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mac80211: add standard deviation to Minstrel stats
[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
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 159 struct cfg80211_chan_def vht_chandef;
179b8fc7 160 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 161 u32 ht_cfreq, ret;
162
179b8fc7
CRI		 163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
6565ec9b
JB		 166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
179b8fc7 171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
53b954ee
EP		 178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 180 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 181 vht_chandef = *chandef;
53b954ee
EP		 182 goto out;
183 }
184
6565ec9b
JB		 185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186 channel->band);
187 /* check that channel matches the right operating channel */
5cdaed1e 188 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 189 /*
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
194 * it should be OK.
195 */
5cdaed1e
JB		 196 sdata_info(sdata,
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201 goto out;
202 }
203
204 /* check 40 MHz support, if we have it */
179b8fc7 205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
210 break;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
214 break;
215 }
216 } else {
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 221 goto out;
222 }
223
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
226 goto out;
227 }
228
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232 channel->band);
233 vht_chandef.center_freq2 = 0;
234
6565ec9b
JB		 235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
cb664981 238 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 239 break;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242 break;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245 break;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
251 channel->band);
6565ec9b
JB		 252 break;
253 default:
5cdaed1e 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 255 sdata_info(sdata,
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
6565ec9b
JB		 258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 264 sdata_info(sdata,
265 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271 ret = 0;
272 goto out;
273 }
274
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 277 sdata_info(sdata,
278 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 279 ret = IEEE80211_STA_DISABLE_VHT;
280 goto out;
281 }
282
283 *chandef = vht_chandef;
284
285 ret = 0;
286
287out:
963a1852
JB		 288 /*
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
299 * starts anew.
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301 *
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
305 */
306 if (tracking &&
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308 return ret;
309
586e01ed
JB		 310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
313
ddfe49b4
JB		 314 /*
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
321 */
6565ec9b 322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 323 tracking ? 0 :
324 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
b56e4b85 328 break;
6565ec9b
JB		 329 }
330
e6b7cde4 331 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 332 }
333
5cdaed1e 334 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 335 sdata_info(sdata,
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339 return ret;
340}
341
30eb1dc2
JB		 342static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
53b954ee 344 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
d5522e03
JB		 348{
349 struct ieee80211_local *local = sdata->local;
30eb1dc2 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 351 struct ieee80211_supported_band *sband;
55de908a 352 struct ieee80211_channel *chan;
30eb1dc2 353 struct cfg80211_chan_def chandef;
9ed6bcce 354 u16 ht_opmode;
30eb1dc2
JB		 355 u32 flags;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
357 int ret;
d5522e03 358
30eb1dc2
JB		 359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 361 return 0;
362
30eb1dc2
JB		 363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365 vht_oper = NULL;
366
367 if (WARN_ON_ONCE(!sta))
368 return -EINVAL;
369
017b45bb
AA		 370 /*
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
373 */
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378 }
379
f2d9330e 380 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 381 sband = local->hw.wiphy->bands[chan->band];
d5522e03 382
30eb1dc2 383 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
386 &chandef, true);
30eb1dc2
JB		 387
388 /*
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
394 */
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 397 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 400 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 403 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 404
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406 return 0;
407
408 sdata_info(sdata,
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
412
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
419 sdata_info(sdata,
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421 ifmgd->bssid);
422 return -EINVAL;
423 }
424
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
429 break;
4bf88530 430 case NL80211_CHAN_WIDTH_40:
30eb1dc2 431 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 432 break;
30eb1dc2
JB		 433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
435 break;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 439 break;
30eb1dc2
JB		 440 default:
441 return -EINVAL;
64f68e5d 442 }
d5522e03 443
30eb1dc2
JB		 444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 446
30eb1dc2
JB		 447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
451 }
64f68e5d 452
30eb1dc2
JB		 453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454 if (ret) {
455 sdata_info(sdata,
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
457 ifmgd->bssid);
458 return ret;
459 }
7cc44ed4 460
30eb1dc2
JB		 461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
0aaffa9b 465 }
d5522e03 466
30eb1dc2 467 return 0;
d5522e03
JB		 468}
469
9c6bd790
JB		 470/* frame sending functions */
471
66e67e41 472static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 473 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
477{
66e67e41
JB		 478 u8 *pos;
479 u32 flags = channel->flags;
480 u16 cap;
481 struct ieee80211_sta_ht_cap ht_cap;
482
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
66e67e41
JB		 485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
66e67e41
JB		 488 /* determine capability flags */
489 cap = ht_cap.cap;
490
9dde6423 491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
502 }
503 break;
504 }
505
24398e39
JB		 506 /*
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
510 */
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
514 }
515
66e67e41
JB		 516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
518 switch (smps) {
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
521 WARN_ON(1);
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
533 break;
534 }
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539}
540
d545daba
MP		 541static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542 struct sk_buff *skb,
b08fbbd8
JB		 543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 545{
546 u8 *pos;
547 u32 cap;
548 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 549 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 550
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 555
556 /* determine capability flags */
557 cap = vht_cap.cap;
558
f2d9d270 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 566 }
567
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 571 }
572
b08fbbd8
JB		 573 /*
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
576 */
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
c1cf6d4e
ES		 581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
585
586 if (ap_bf_sts < our_bf_sts) {
587 cap &= ~mask;
588 cap |= ap_bf_sts;
589 }
590
d545daba 591 /* reserve and fill IE */
d4950281 592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594}
595
66e67e41
JB		 596static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601 struct sk_buff *skb;
602 struct ieee80211_mgmt *mgmt;
603 u8 *pos, qos_info;
604 size_t offset = 0, noffset;
2103dec1 605 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 606 u16 capab;
607 struct ieee80211_supported_band *sband;
55de908a
JB		 608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
2103dec1 610 u32 rate_flags, rates = 0;
66e67e41 611
8d61ffa5 612 sdata_assert_lock(sdata);
66e67e41 613
55de908a
JB		 614 rcu_read_lock();
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
617 rcu_read_unlock();
618 return;
619 }
4bf88530 620 chan = chanctx_conf->def.chan;
2103dec1 621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 622 rcu_read_unlock();
623 sband = local->hw.wiphy->bands[chan->band];
2103dec1 624 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 625
626 if (assoc_data->supp_rates_len) {
627 /*
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
631 * b-only mode)...
632 */
2103dec1
SW		 633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
636 &rates);
66e67e41
JB		 637 } else {
638 /*
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
642 */
2103dec1
SW		 643 rates_len = 0;
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
646 != rate_flags)
647 continue;
648 rates |= BIT(i);
649 rates_len++;
650 }
66e67e41
JB		 651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
cd2f5dd7
AK		 685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
66e67e41
JB		 688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695 skb_put(skb, 10);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 ETH_ALEN);
703 } else {
704 skb_put(skb, 4);
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
710 }
711
712 /* SSID */
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
721 supp_rates_len = 8;
722
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
726
727 count = 0;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
2103dec1
SW		 730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 5 * (1 << shift));
732 *pos++ = (u8) rate;
66e67e41
JB		 733 if (++count == 8)
734 break;
735 }
736 }
737
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
742
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
2103dec1
SW		 745 int rate;
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747 5 * (1 << shift));
748 *pos++ = (u8) rate;
66e67e41
JB		 749 }
750 }
751 }
752
cd2f5dd7
AK		 753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
0430c883
SW		 759 /* max tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 761 }
66e67e41 762
cd2f5dd7 763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
772 }
773 }
774
775 /* if present, add any custom IEs that go before HT */
b3f51e94 776 if (assoc_data->ie_len) {
66e67e41
JB		 777 static const u8 before_ht[] = {
778 WLAN_EID_SSID,
779 WLAN_EID_SUPP_RATES,
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
783 WLAN_EID_RSN,
784 WLAN_EID_QOS_CAPA,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 };
8ed28747
JB		 791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
802 };
803
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805 assoc_data->ie_len,
806 before_ht,
807 ARRAY_SIZE(before_ht),
808 after_ric,
809 ARRAY_SIZE(after_ric),
810 offset);
66e67e41
JB		 811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813 offset = noffset;
814 }
815
f2d9d270
JB		 816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
a8243b72 820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 822 sband, chan, sdata->smps_mode);
66e67e41 823
3de3802c
JB		 824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
827 WLAN_EID_SSID,
828 WLAN_EID_SUPP_RATES,
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
832 WLAN_EID_RSN,
833 WLAN_EID_QOS_CAPA,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
843 };
8ed28747
JB		 844
845 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
d545daba 854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
d545daba 857
66e67e41 858 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 859 if (assoc_data->ie_len) {
66e67e41
JB		 860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861 assoc_data->ie_len,
862 offset);
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865 offset = noffset;
866 }
867
76f0303d
JB		 868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
dc41e4d4
EP		 870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873 } else {
874 qos_info = 0;
875 }
876
40b861a0 877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 878 }
879
880 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 881 if (assoc_data->ie_len) {
66e67e41
JB		 882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 }
886
a1845fc7
JB		 887 drv_mgd_prepare_tx(local, sdata);
888
66e67e41 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 893 ieee80211_tx_skb(sdata, skb);
894}
895
572e0012
KV		 896void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
898{
572e0012
KV		 899 struct ieee80211_pspoll *pspoll;
900 struct sk_buff *skb;
572e0012 901
d8cd189e
KV		 902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903 if (!skb)
572e0012 904 return;
572e0012 905
d8cd189e
KV		 906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 908
62ae67be
JB		 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 911}
912
965bedad
JB		 913void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
915 int powersave)
916{
917 struct sk_buff *skb;
d8cd189e 918 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 920
d8cd189e
KV		 921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922 if (!skb)
965bedad 923 return;
965bedad 924
d8cd189e 925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 926 if (powersave)
d8cd189e 927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 928
6c17b77b
SF		 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 931
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
392b9ffb 935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
62ae67be 938 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 939}
940
d524215f
FF		 941static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
943{
944 struct sk_buff *skb;
945 struct ieee80211_hdr *nullfunc;
946 __le16 fc;
947
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949 return;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 952 if (!skb)
d524215f 953 return;
d15b8459 954
d524215f
FF		 955 skb_reserve(skb, local->hw.extra_tx_headroom);
956
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
969}
970
cc32abd4
JB		 971/* spectrum management related things */
972static void ieee80211_chswitch_work(struct work_struct *work)
973{
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 976 struct ieee80211_local *local = sdata->local;
cc32abd4 977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 978 int ret;
cc32abd4 979
9607e6b6 980 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 981 return;
982
8d61ffa5 983 sdata_lock(sdata);
4c3ebc56
MK		 984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
986
77fdaa12
JB		 987 if (!ifmgd->associated)
988 goto out;
cc32abd4 989
4c3ebc56
MK		 990 if (!sdata->vif.csa_active)
991 goto out;
992
993 /*
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
998 */
999
1000 if (sdata->reserved_chanctx) {
1001 /*
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1004 * reservations
1005 */
1006 if (sdata->reserved_ready)
1007 goto out;
1008
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1010 if (ret) {
1011 sdata_info(sdata,
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ret);
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1016 goto out;
1017 }
1018
1019 goto out;
1020 }
1021
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
7578d575 1024 sdata_info(sdata,
4c3ebc56 1025 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 goto out;
1029 }
675a0b04 1030
cc32abd4 1031 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1033
0c21e632
LC		 1034 ifmgd->csa_waiting_bcn = true;
1035
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1038
1039out:
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1043}
1044
1045static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046{
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049 int ret;
1050
1051 sdata_assert_lock(sdata);
1052
1053 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1054
a46992b4
LC		 1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1059 }
7578d575 1060
0c21e632
LC		 1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1063
f1d65583
LC		 1064 ret = drv_post_channel_switch(sdata);
1065 if (ret) {
1066 sdata_info(sdata,
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
0c21e632 1070 return;
f1d65583 1071 }
688b1ecf
LC		 1072
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1074}
1075
5ce6e438
JB		 1076void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077{
55de908a
JB		 1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1080
1081 trace_api_chswitch_done(sdata, success);
1082 if (!success) {
882a7c69
JB		 1083 sdata_info(sdata,
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1087 } else {
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1089 }
5ce6e438
JB		 1090}
1091EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
cc32abd4
JB		 1093static void ieee80211_chswitch_timer(unsigned long data)
1094{
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
5bb644a0 1097
9b7d72c1 1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1099}
1100
37799e52 1101static void
4a3cb702 1102ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1103 u64 timestamp, u32 device_timestamp,
1104 struct ieee802_11_elems *elems,
04a161f4 1105 bool beacon)
cc32abd4 1106{
b4f286a1 1107 struct ieee80211_local *local = sdata->local;
cc32abd4 1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1109 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1110 struct ieee80211_chanctx_conf *conf;
55de908a 1111 struct ieee80211_chanctx *chanctx;
e6b7cde4 1112 enum ieee80211_band current_band;
c0f17eb9 1113 struct ieee80211_csa_ie csa_ie;
6d027bcc 1114 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1115 int res;
cc32abd4 1116
8d61ffa5 1117 sdata_assert_lock(sdata);
77fdaa12 1118
37799e52 1119 if (!cbss)
cc32abd4
JB		 1120 return;
1121
b4f286a1 1122 if (local->scanning)
cc32abd4
JB		 1123 return;
1124
37799e52 1125 /* disregard subsequent announcements if we are already processing */
3e2a0226 1126 if (sdata->vif.csa_active)
cc32abd4
JB		 1127 return;
1128
e6b7cde4 1129 current_band = cbss->channel->band;
c0f17eb9 1130 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1131 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1132 ifmgd->flags,
c0f17eb9 1133 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1134 if (res < 0)
b4f286a1 1135 ieee80211_queue_work(&local->hw,
882a7c69 1136 &ifmgd->csa_connection_drop_work);
e6b7cde4 1137 if (res)
cc32abd4 1138 return;
cd64f2a9 1139
c0f17eb9 1140 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1141 IEEE80211_CHAN_DISABLED)) {
1142 sdata_info(sdata,
1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1144 ifmgd->associated->bssid,
c0f17eb9
CYY		 1145 csa_ie.chandef.chan->center_freq,
1146 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147 csa_ie.chandef.center_freq2);
85220d71
JB		 1148 ieee80211_queue_work(&local->hw,
1149 &ifmgd->csa_connection_drop_work);
1150 return;
1151 }
1152
f84eaa10
JB		 1153 if (cfg80211_chandef_identical(&csa_ie.chandef,
1154 &sdata->vif.bss_conf.chandef)) {
1155 if (ifmgd->csa_ignored_same_chan)
1156 return;
1157 sdata_info(sdata,
1158 "AP %pM tries to chanswitch to same channel, ignore\n",
1159 ifmgd->associated->bssid);
1160 ifmgd->csa_ignored_same_chan = true;
1161 return;
1162 }
1163
4c3ebc56 1164 mutex_lock(&local->mtx);
7578d575 1165 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1166 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1167 lockdep_is_held(&local->chanctx_mtx));
1168 if (!conf) {
1169 sdata_info(sdata,
1170 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1171 goto drop_connection;
4c3ebc56
MK		 1172 }
1173
1174 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1175
0f791eb4
LC		 1176 if (local->use_chanctx &&
1177 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1178 sdata_info(sdata,
1179 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1180 goto drop_connection;
55de908a
JB		 1181 }
1182
6d027bcc
LC		 1183 ch_switch.timestamp = timestamp;
1184 ch_switch.device_timestamp = device_timestamp;
1185 ch_switch.block_tx = csa_ie.mode;
1186 ch_switch.chandef = csa_ie.chandef;
1187 ch_switch.count = csa_ie.count;
1188
1189 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1190 sdata_info(sdata,
1191 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1192 goto drop_connection;
6d027bcc
LC		 1193 }
1194
4c3ebc56
MK		 1195 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1196 chanctx->mode, false);
1197 if (res) {
55de908a 1198 sdata_info(sdata,
4c3ebc56
MK		 1199 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1200 res);
f3b0bbb3 1201 goto drop_connection;
55de908a 1202 }
b4f286a1 1203 mutex_unlock(&local->chanctx_mtx);
55de908a 1204
c46a73f3 1205 sdata->vif.csa_active = true;
4c3ebc56 1206 sdata->csa_chandef = csa_ie.chandef;
59af6928 1207 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1208 ifmgd->csa_ignored_same_chan = false;
55de908a 1209
59af6928 1210 if (sdata->csa_block_tx)
a46992b4
LC		 1211 ieee80211_stop_vif_queues(local, sdata,
1212 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1213 mutex_unlock(&local->mtx);
57eebdf3 1214
2f457293
LC		 1215 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1216 csa_ie.count);
1217
b4f286a1 1218 if (local->ops->channel_switch) {
5ce6e438 1219 /* use driver's channel switch callback */
0f791eb4 1220 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1221 return;
1222 }
1223
1224 /* channel switch handled in software */
c0f17eb9 1225 if (csa_ie.count <= 1)
b4f286a1 1226 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1227 else
cc32abd4 1228 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1229 TU_TO_EXP_TIME((csa_ie.count - 1) *
1230 cbss->beacon_interval));
f3b0bbb3
JB		 1231 return;
1232 drop_connection:
1233 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1234 mutex_unlock(&local->chanctx_mtx);
1235 mutex_unlock(&local->mtx);
cc32abd4
JB		 1236}
1237
24a4e400
SG		 1238static bool
1239ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1240 struct ieee80211_channel *channel,
1241 const u8 *country_ie, u8 country_ie_len,
1242 const u8 *pwr_constr_elem,
1243 int *chan_pwr, int *pwr_reduction)
cc32abd4 1244{
04b7b2ff
JB		 1245 struct ieee80211_country_ie_triplet *triplet;
1246 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1247 int i, chan_increment;
04b7b2ff 1248 bool have_chan_pwr = false;
cc32abd4 1249
04b7b2ff
JB		 1250 /* Invalid IE */
1251 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1252 return false;
cc32abd4 1253
04b7b2ff
JB		 1254 triplet = (void *)(country_ie + 3);
1255 country_ie_len -= 3;
1256
1257 switch (channel->band) {
1258 default:
1259 WARN_ON_ONCE(1);
1260 /* fall through */
1261 case IEEE80211_BAND_2GHZ:
1262 case IEEE80211_BAND_60GHZ:
1263 chan_increment = 1;
1264 break;
1265 case IEEE80211_BAND_5GHZ:
1266 chan_increment = 4;
1267 break;
cc32abd4 1268 }
04b7b2ff
JB		 1269
1270 /* find channel */
1271 while (country_ie_len >= 3) {
1272 u8 first_channel = triplet->chans.first_channel;
1273
1274 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1275 goto next;
1276
1277 for (i = 0; i < triplet->chans.num_channels; i++) {
1278 if (first_channel + i * chan_increment == chan) {
1279 have_chan_pwr = true;
24a4e400 1280 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1281 break;
1282 }
1283 }
1284 if (have_chan_pwr)
1285 break;
1286
1287 next:
1288 triplet++;
1289 country_ie_len -= 3;
1290 }
1291
a5fee9cb 1292 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1293 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1294 else
1295 *pwr_reduction = 0;
1296
24a4e400
SG		 1297 return have_chan_pwr;
1298}
1299
c8d65917
SG		 1300static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_channel *channel,
1302 const u8 *cisco_dtpc_ie,
1303 int *pwr_level)
1304{
1305 /* From practical testing, the first data byte of the DTPC element
1306 * seems to contain the requested dBm level, and the CLI on Cisco
1307 * APs clearly state the range is -127 to 127 dBm, which indicates
1308 * a signed byte, although it seemingly never actually goes negative.
1309 * The other byte seems to always be zero.
1310 */
1311 *pwr_level = (__s8)cisco_dtpc_ie[4];
1312}
1313
24a4e400
SG		 1314static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1315 struct ieee80211_channel *channel,
1316 struct ieee80211_mgmt *mgmt,
1317 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1318 const u8 *pwr_constr_ie,
1319 const u8 *cisco_dtpc_ie)
24a4e400 1320{
c8d65917
SG		 1321 bool has_80211h_pwr = false, has_cisco_pwr = false;
1322 int chan_pwr = 0, pwr_reduction_80211h = 0;
1323 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1324 int new_ap_level;
a5fee9cb 1325 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1326
a5fee9cb
MB		 1327 if (country_ie &&
1328 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1329 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1330 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1331 sdata, channel, country_ie, country_ie_len,
1332 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1333 pwr_level_80211h =
1334 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1335 }
1336
1337 if (cisco_dtpc_ie) {
1338 ieee80211_find_cisco_dtpc(
1339 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1340 has_cisco_pwr = true;
24a4e400 1341 }
04b7b2ff 1342
c8d65917 1343 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1344 return 0;
04b7b2ff 1345
c8d65917
SG		 1346 /* If we have both 802.11h and Cisco DTPC, apply both limits
1347 * by picking the smallest of the two power levels advertised.
1348 */
1349 if (has_80211h_pwr &&
1350 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1351 sdata_info(sdata,
1352 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1353 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1354 sdata->u.mgd.bssid);
1355 new_ap_level = pwr_level_80211h;
1356 } else { /* has_cisco_pwr is always true here. */
1357 sdata_info(sdata,
1358 "Limiting TX power to %d dBm as advertised by %pM\n",
1359 pwr_level_cisco, sdata->u.mgd.bssid);
1360 new_ap_level = pwr_level_cisco;
1361 }
04b7b2ff 1362
1ea6f9c0
JB		 1363 if (sdata->ap_power_level == new_ap_level)
1364 return 0;
04b7b2ff 1365
1ea6f9c0
JB		 1366 sdata->ap_power_level = new_ap_level;
1367 if (__ieee80211_recalc_txpower(sdata))
1368 return BSS_CHANGED_TXPOWER;
1369 return 0;
cc32abd4
JB		 1370}
1371
965bedad
JB		 1372/* powersave */
1373static void ieee80211_enable_ps(struct ieee80211_local *local,
1374 struct ieee80211_sub_if_data *sdata)
1375{
1376 struct ieee80211_conf *conf = &local->hw.conf;
1377
d5edaedc
JB		 1378 /*
1379 * If we are scanning right now then the parameters will
1380 * take effect when scan finishes.
1381 */
fbe9c429 1382 if (local->scanning)
d5edaedc
JB		 1383 return;
1384
965bedad
JB		 1385 if (conf->dynamic_ps_timeout > 0 &&
1386 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1387 mod_timer(&local->dynamic_ps_timer, jiffies +
1388 msecs_to_jiffies(conf->dynamic_ps_timeout));
1389 } else {
1390 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1391 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1392
2a13052f
JO		 1393 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1394 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1395 return;
1396
1397 conf->flags |= IEEE80211_CONF_PS;
1398 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1399 }
1400}
1401
1402static void ieee80211_change_ps(struct ieee80211_local *local)
1403{
1404 struct ieee80211_conf *conf = &local->hw.conf;
1405
1406 if (local->ps_sdata) {
965bedad
JB		 1407 ieee80211_enable_ps(local, local->ps_sdata);
1408 } else if (conf->flags & IEEE80211_CONF_PS) {
1409 conf->flags &= ~IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411 del_timer_sync(&local->dynamic_ps_timer);
1412 cancel_work_sync(&local->dynamic_ps_enable_work);
1413 }
1414}
1415
808118cb
JY		 1416static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1417{
1418 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1419 struct sta_info *sta = NULL;
c2c98fde 1420 bool authorized = false;
808118cb
JY		 1421
1422 if (!mgd->powersave)
1423 return false;
1424
05cb9108
JB		 1425 if (mgd->broken_ap)
1426 return false;
1427
808118cb
JY		 1428 if (!mgd->associated)
1429 return false;
1430
392b9ffb 1431 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1432 return false;
1433
989c6505 1434 if (!mgd->have_beacon)
ce857888
AB		 1435 return false;
1436
808118cb
JY		 1437 rcu_read_lock();
1438 sta = sta_info_get(sdata, mgd->bssid);
1439 if (sta)
c2c98fde 1440 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1441 rcu_read_unlock();
1442
c2c98fde 1443 return authorized;
808118cb
JY		 1444}
1445
965bedad 1446/* need to hold RTNL or interface lock */
10f644a4 1447void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1448{
1449 struct ieee80211_sub_if_data *sdata, *found = NULL;
1450 int count = 0;
195e294d 1451 int timeout;
965bedad
JB		 1452
1453 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1454 local->ps_sdata = NULL;
1455 return;
1456 }
1457
1458 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1459 if (!ieee80211_sdata_running(sdata))
965bedad 1460 continue;
8c7914de
RM		 1461 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1462 /* If an AP vif is found, then disable PS
1463 * by setting the count to zero thereby setting
1464 * ps_sdata to NULL.
1465 */
1466 count = 0;
1467 break;
1468 }
965bedad
JB		 1469 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1470 continue;
1471 found = sdata;
1472 count++;
1473 }
1474
808118cb 1475 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1476 s32 beaconint_us;
1477
1478 if (latency < 0)
ed77134b 1479 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1480
1481 beaconint_us = ieee80211_tu_to_usec(
1482 found->vif.bss_conf.beacon_int);
1483
ff616381 1484 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1485 if (timeout < 0) {
1486 /*
ff616381
JO		 1487 * Go to full PSM if the user configures a very low
1488 * latency requirement.
0ab82b04
EP		 1489 * The 2000 second value is there for compatibility
1490 * until the PM_QOS_NETWORK_LATENCY is configured
1491 * with real values.
195e294d 1492 */
0ab82b04
EP		 1493 if (latency > (1900 * USEC_PER_MSEC) &&
1494 latency != (2000 * USEC_PER_SEC))
195e294d 1495 timeout = 0;
ff616381
JO		 1496 else
1497 timeout = 100;
195e294d 1498 }
09b85568 1499 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1500
04fe2037 1501 if (beaconint_us > latency) {
10f644a4 1502 local->ps_sdata = NULL;
04fe2037 1503 } else {
04fe2037 1504 int maxslp = 1;
826262c3 1505 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1506
1507 /* If the TIM IE is invalid, pretend the value is 1 */
1508 if (!dtimper)
1509 dtimper = 1;
1510 else if (dtimper > 1)
04fe2037
JB		 1511 maxslp = min_t(int, dtimper,
1512 latency / beaconint_us);
1513
9ccebe61 1514 local->hw.conf.max_sleep_period = maxslp;
56007a02 1515 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1516 local->ps_sdata = found;
04fe2037 1517 }
10f644a4 1518 } else {
965bedad 1519 local->ps_sdata = NULL;
10f644a4 1520 }
965bedad
JB		 1521
1522 ieee80211_change_ps(local);
1523}
1524
ab095877
EP		 1525void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1526{
1527 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1528
1529 if (sdata->vif.bss_conf.ps != ps_allowed) {
1530 sdata->vif.bss_conf.ps = ps_allowed;
1531 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1532 }
1533}
1534
965bedad
JB		 1535void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1536{
1537 struct ieee80211_local *local =
1538 container_of(work, struct ieee80211_local,
1539 dynamic_ps_disable_work);
1540
1541 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1542 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1543 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1544 }
1545
1546 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1547 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1548 IEEE80211_QUEUE_STOP_REASON_PS,
1549 false);
965bedad
JB		 1550}
1551
1552void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1553{
1554 struct ieee80211_local *local =
1555 container_of(work, struct ieee80211_local,
1556 dynamic_ps_enable_work);
1557 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1558 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1559 unsigned long flags;
1560 int q;
965bedad
JB		 1561
1562 /* can only happen when PS was just disabled anyway */
1563 if (!sdata)
1564 return;
1565
5e34069c
CL		 1566 ifmgd = &sdata->u.mgd;
1567
965bedad
JB		 1568 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1569 return;
1570
09b85568 1571 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1572 /* don't enter PS if TX frames are pending */
1573 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1574 mod_timer(&local->dynamic_ps_timer, jiffies +
1575 msecs_to_jiffies(
1576 local->hw.conf.dynamic_ps_timeout));
1577 return;
1578 }
77b7023a
AN		 1579
1580 /*
1581 * transmission can be stopped by others which leads to
1582 * dynamic_ps_timer expiry. Postpone the ps timer if it
1583 * is not the actual idle state.
1584 */
1585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1586 for (q = 0; q < local->hw.queues; q++) {
1587 if (local->queue_stop_reasons[q]) {
1588 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1589 flags);
1590 mod_timer(&local->dynamic_ps_timer, jiffies +
1591 msecs_to_jiffies(
1592 local->hw.conf.dynamic_ps_timeout));
1593 return;
1594 }
1595 }
1596 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1597 }
1ddc2867 1598
375177bf 1599 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1600 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1601 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1602 mod_timer(&local->dynamic_ps_timer, jiffies +
1603 msecs_to_jiffies(
1604 local->hw.conf.dynamic_ps_timeout));
a1598383 1605 } else {
e8306f98
VN		 1606 ieee80211_send_nullfunc(local, sdata, 1);
1607 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1608 ieee80211_flush_queues(local, sdata, false);
e8306f98 1609 }
f3e85b9e
VN		 1610 }
1611
2a13052f
JO		 1612 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1613 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1614 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1615 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1616 local->hw.conf.flags |= IEEE80211_CONF_PS;
1617 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1618 }
965bedad
JB		 1619}
1620
1621void ieee80211_dynamic_ps_timer(unsigned long data)
1622{
1623 struct ieee80211_local *local = (void *) data;
1624
42935eca 1625 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1626}
1627
164eb02d
SW		 1628void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1629{
1630 struct delayed_work *delayed_work =
1631 container_of(work, struct delayed_work, work);
1632 struct ieee80211_sub_if_data *sdata =
1633 container_of(delayed_work, struct ieee80211_sub_if_data,
1634 dfs_cac_timer_work);
d2859df5 1635 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1636
34a3740d
JB		 1637 mutex_lock(&sdata->local->mtx);
1638 if (sdata->wdev.cac_started) {
1639 ieee80211_vif_release_channel(sdata);
1640 cfg80211_cac_event(sdata->dev, &chandef,
1641 NL80211_RADAR_CAC_FINISHED,
1642 GFP_KERNEL);
1643 }
1644 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1645}
1646
02219b3a
JB		 1647static bool
1648__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1649{
1650 struct ieee80211_local *local = sdata->local;
1651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1652 bool ret = false;
02219b3a
JB		 1653 int ac;
1654
1655 if (local->hw.queues < IEEE80211_NUM_ACS)
1656 return false;
1657
1658 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1659 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1660 int non_acm_ac;
1661 unsigned long now = jiffies;
1662
1663 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1664 tx_tspec->admitted_time &&
1665 time_after(now, tx_tspec->time_slice_start + HZ)) {
1666 tx_tspec->consumed_tx_time = 0;
1667 tx_tspec->time_slice_start = now;
1668
1669 if (tx_tspec->downgraded)
1670 tx_tspec->action =
1671 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1672 }
1673
1674 switch (tx_tspec->action) {
1675 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1676 /* take the original parameters */
1677 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1678 sdata_err(sdata,
1679 "failed to set TX queue parameters for queue %d\n",
1680 ac);
1681 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1682 tx_tspec->downgraded = false;
1683 ret = true;
1684 break;
1685 case TX_TSPEC_ACTION_DOWNGRADE:
1686 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 ret = true;
1689 break;
1690 }
1691 /* downgrade next lower non-ACM AC */
1692 for (non_acm_ac = ac + 1;
1693 non_acm_ac < IEEE80211_NUM_ACS;
1694 non_acm_ac++)
1695 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1696 break;
1697 /* The loop will result in using BK even if it requires
1698 * admission control, such configuration makes no sense
1699 * and we have to transmit somehow - the AC selection
1700 * does the same thing.
1701 */
1702 if (drv_conf_tx(local, sdata, ac,
1703 &sdata->tx_conf[non_acm_ac]))
1704 sdata_err(sdata,
1705 "failed to set TX queue parameters for queue %d\n",
1706 ac);
1707 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1708 ret = true;
1709 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1710 tx_tspec->time_slice_start + HZ - now + 1);
1711 break;
1712 case TX_TSPEC_ACTION_NONE:
1713 /* nothing now */
1714 break;
1715 }
1716 }
1717
1718 return ret;
1719}
1720
1721void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1722{
1723 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1724 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1725}
1726
1727static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1728{
1729 struct ieee80211_sub_if_data *sdata;
1730
1731 sdata = container_of(work, struct ieee80211_sub_if_data,
1732 u.mgd.tx_tspec_wk.work);
1733 ieee80211_sta_handle_tspec_ac_params(sdata);
1734}
1735
60f8b39c 1736/* MLME */
7d25745d 1737static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1738 struct ieee80211_sub_if_data *sdata,
4a3cb702 1739 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1740{
f0706e82 1741 struct ieee80211_tx_queue_params params;
4ced3f74 1742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1743 size_t left;
1744 int count;
4a3cb702
JB		 1745 const u8 *pos;
1746 u8 uapsd_queues = 0;
f0706e82 1747
e1b3ec1a 1748 if (!local->ops->conf_tx)
7d25745d 1749 return false;
e1b3ec1a 1750
32c5057b 1751 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1752 return false;
3434fbd3
JB		 1753
1754 if (!wmm_param)
7d25745d 1755 return false;
3434fbd3 1756
f0706e82 1757 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1758 return false;
ab13315a
KV		 1759
1760 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1761 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1762
f0706e82 1763 count = wmm_param[6] & 0x0f;
46900298 1764 if (count == ifmgd->wmm_last_param_set)
7d25745d 1765 return false;
46900298 1766 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1767
1768 pos = wmm_param + 8;
1769 left = wmm_param_len - 8;
1770
1771 memset(&params, 0, sizeof(params));
1772
00e96dec 1773 sdata->wmm_acm = 0;
f0706e82
JB		 1774 for (; left >= 4; left -= 4, pos += 4) {
1775 int aci = (pos[0] >> 5) & 0x03;
1776 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1777 bool uapsd = false;
f0706e82
JB		 1778 int queue;
1779
1780 switch (aci) {
0eeb59fe 1781 case 1: /* AC_BK */
e100bb64 1782 queue = 3;
988c0f72 1783 if (acm)
00e96dec 1784 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1785 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1786 uapsd = true;
f0706e82 1787 break;
0eeb59fe 1788 case 2: /* AC_VI */
e100bb64 1789 queue = 1;
988c0f72 1790 if (acm)
00e96dec 1791 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1793 uapsd = true;
f0706e82 1794 break;
0eeb59fe 1795 case 3: /* AC_VO */
e100bb64 1796 queue = 0;
988c0f72 1797 if (acm)
00e96dec 1798 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1799 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1800 uapsd = true;
f0706e82 1801 break;
0eeb59fe 1802 case 0: /* AC_BE */
f0706e82 1803 default:
e100bb64 1804 queue = 2;
988c0f72 1805 if (acm)
00e96dec 1806 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1807 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1808 uapsd = true;
f0706e82
JB		 1809 break;
1810 }
1811
1812 params.aifs = pos[0] & 0x0f;
1813 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1814 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1815 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1816 params.acm = acm;
ab13315a
KV		 1817 params.uapsd = uapsd;
1818
bdcbd8e0 1819 mlme_dbg(sdata,
02219b3a 1820 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1821 queue, aci, acm,
1822 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1823 params.txop, params.uapsd,
1824 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1825 sdata->tx_conf[queue] = params;
02219b3a
JB		 1826 if (!ifmgd->tx_tspec[queue].downgraded &&
1827 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1828 sdata_err(sdata,
1829 "failed to set TX queue parameters for queue %d\n",
1830 queue);
f0706e82 1831 }
e1b3ec1a
SG		 1832
1833 /* enable WMM or activate new settings */
4ced3f74 1834 sdata->vif.bss_conf.qos = true;
7d25745d 1835 return true;
f0706e82
JB		 1836}
1837
925e64c3
SG		 1838static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1839{
1840 lockdep_assert_held(&sdata->local->mtx);
1841
392b9ffb 1842 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1843 ieee80211_run_deferred_scan(sdata->local);
1844}
1845
1846static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1847{
1848 mutex_lock(&sdata->local->mtx);
1849 __ieee80211_stop_poll(sdata);
1850 mutex_unlock(&sdata->local->mtx);
1851}
1852
7a5158ef
JB		 1853static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1854 u16 capab, bool erp_valid, u8 erp)
5628221c 1855{
bda3933a 1856 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1857 u32 changed = 0;
7a5158ef
JB		 1858 bool use_protection;
1859 bool use_short_preamble;
1860 bool use_short_slot;
1861
1862 if (erp_valid) {
1863 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1864 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1865 } else {
1866 use_protection = false;
1867 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1868 }
1869
1870 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1871 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1872 use_short_slot = true;
5628221c 1873
471b3efd 1874 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1875 bss_conf->use_cts_prot = use_protection;
1876 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1877 }
7e9ed188 1878
d43c7b37 1879 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1880 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1881 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1882 }
d9430a32 1883
7a5158ef 1884 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1885 bss_conf->use_short_slot = use_short_slot;
1886 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1887 }
1888
1889 return changed;
1890}
1891
f698d856 1892static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1893 struct cfg80211_bss *cbss,
ae5eb026 1894 u32 bss_info_changed)
f0706e82 1895{
0c1ad2ca 1896 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1897 struct ieee80211_local *local = sdata->local;
68542962 1898 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1899
ae5eb026 1900 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1901 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1902 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1903
7ccc8bd7 1904 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1905 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1906
0c1ad2ca
JB		 1907 sdata->u.mgd.associated = cbss;
1908 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1909
17e4ec14
JM		 1910 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1911
488dd7b5 1912 if (sdata->vif.p2p) {
9caf0364 1913 const struct cfg80211_bss_ies *ies;
488dd7b5 1914
9caf0364
JB		 1915 rcu_read_lock();
1916 ies = rcu_dereference(cbss->ies);
1917 if (ies) {
9caf0364
JB		 1918 int ret;
1919
1920 ret = cfg80211_get_p2p_attr(
1921 ies->data, ies->len,
1922 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1923 (u8 *) &bss_conf->p2p_noa_attr,
1924 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1925 if (ret >= 2) {
67baf663
JD		 1926 sdata->u.mgd.p2p_noa_index =
1927 bss_conf->p2p_noa_attr.index;
9caf0364 1928 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1929 }
488dd7b5 1930 }
9caf0364 1931 rcu_read_unlock();
488dd7b5
JB		 1932 }
1933
b291ba11 1934 /* just to be sure */
925e64c3 1935 ieee80211_stop_poll(sdata);
b291ba11 1936
9ac19a90 1937 ieee80211_led_assoc(local, 1);
9306102e 1938
989c6505 1939 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1940 /*
1941 * If the AP is buggy we may get here with no DTIM period
1942 * known, so assume it's 1 which is the only safe assumption
1943 * in that case, although if the TIM IE is broken powersave
1944 * probably just won't work at all.
1945 */
1946 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1947 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1948 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1949 } else {
817cee76 1950 bss_conf->beacon_rate = NULL;
e5b900d2 1951 bss_conf->dtim_period = 0;
826262c3 1952 }
e5b900d2 1953
68542962 1954 bss_conf->assoc = 1;
9cef8737 1955
a97c13c3 1956 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1957 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1958 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1959 bss_info_changed |= BSS_CHANGED_CQM;
1960
68542962 1961 /* Enable ARP filtering */
0f19b41e 1962 if (bss_conf->arp_addr_cnt)
68542962 1963 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1964
ae5eb026 1965 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1966
056508dc
JB		 1967 mutex_lock(&local->iflist_mtx);
1968 ieee80211_recalc_ps(local, -1);
1969 mutex_unlock(&local->iflist_mtx);
e0cb686f 1970
04ecd257 1971 ieee80211_recalc_smps(sdata);
ab095877
EP		 1972 ieee80211_recalc_ps_vif(sdata);
1973
9ac19a90 1974 netif_carrier_on(sdata->dev);
f0706e82
JB		 1975}
1976
e69e95db 1977static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1978 u16 stype, u16 reason, bool tx,
1979 u8 *frame_buf)
aa458d17 1980{
46900298 1981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1982 struct ieee80211_local *local = sdata->local;
3cc5240b 1983 u32 changed = 0;
aa458d17 1984
8d61ffa5 1985 sdata_assert_lock(sdata);
77fdaa12 1986
37ad3888
JB		 1987 if (WARN_ON_ONCE(tx && !frame_buf))
1988 return;
1989
b291ba11
JB		 1990 if (WARN_ON(!ifmgd->associated))
1991 return;
1992
79543d8e
DS		 1993 ieee80211_stop_poll(sdata);
1994
77fdaa12 1995 ifmgd->associated = NULL;
aa458d17
TW		 1996 netif_carrier_off(sdata->dev);
1997
88bc40e8
EP		 1998 /*
1999 * if we want to get out of ps before disassoc (why?) we have
2000 * to do it before sending disassoc, as otherwise the null-packet
2001 * won't be valid.
2002 */
2003 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2004 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2005 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2006 }
2007 local->ps_sdata = NULL;
2008
ab095877
EP		 2009 /* disable per-vif ps */
2010 ieee80211_recalc_ps_vif(sdata);
2011
14f2ae83
EG		 2012 /* make sure ongoing transmission finishes */
2013 synchronize_net();
2014
3b24f4c6
EG		 2015 /*
2016 * drop any frame before deauth/disassoc, this can be data or
2017 * management frame. Since we are disconnecting, we should not
2018 * insist sending these frames which can take time and delay
2019 * the disconnection and possible the roaming.
2020 */
f823981e 2021 if (tx)
3b24f4c6 2022 ieee80211_flush_queues(local, sdata, true);
f823981e 2023
37ad3888
JB		 2024 /* deauthenticate/disassociate now */
2025 if (tx || frame_buf)
88a9e31c
EP		 2026 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2027 reason, tx, frame_buf);
37ad3888 2028
3b24f4c6 2029 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2030 if (tx)
3b24f4c6 2031 ieee80211_flush_queues(local, sdata, false);
37ad3888 2032
88a9e31c 2033 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2034 eth_zero_addr(ifmgd->bssid);
88a9e31c 2035
37ad3888 2036 /* remove AP and TDLS peers */
d34ba216 2037 sta_info_flush(sdata);
37ad3888
JB		 2038
2039 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2040 changed |= ieee80211_reset_erp_info(sdata);
2041
f5e5bf25 2042 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2043 changed |= BSS_CHANGED_ASSOC;
2044 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2045
67baf663
JD		 2046 ifmgd->p2p_noa_index = -1;
2047 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2048 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2049
dd5ecfea 2050 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2051 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2052 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2053 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2054 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2055
1ea6f9c0 2056 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2057
520eb820
KV		 2058 del_timer_sync(&local->dynamic_ps_timer);
2059 cancel_work_sync(&local->dynamic_ps_enable_work);
2060
68542962 2061 /* Disable ARP filtering */
0f19b41e 2062 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2063 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2064
3abead59
JB		 2065 sdata->vif.bss_conf.qos = false;
2066 changed |= BSS_CHANGED_QOS;
2067
0aaffa9b
JB		 2068 /* The BSSID (not really interesting) and HT changed */
2069 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2070 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2071
3abead59
JB		 2072 /* disassociated - set to defaults now */
2073 ieee80211_set_wmm_default(sdata, false);
2074
b9dcf712
JB		 2075 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2076 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2077 del_timer_sync(&sdata->u.mgd.timer);
2078 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2079
826262c3 2080 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2081 sdata->vif.bss_conf.beacon_rate = NULL;
2082
989c6505 2083 ifmgd->have_beacon = false;
826262c3 2084
028e8da0 2085 ifmgd->flags = 0;
34a3740d 2086 mutex_lock(&local->mtx);
028e8da0 2087 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2088
2089 sdata->vif.csa_active = false;
0c21e632 2090 ifmgd->csa_waiting_bcn = false;
f84eaa10 2091 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2092 if (sdata->csa_block_tx) {
2093 ieee80211_wake_vif_queues(local, sdata,
2094 IEEE80211_QUEUE_STOP_REASON_CSA);
2095 sdata->csa_block_tx = false;
2096 }
34a3740d 2097 mutex_unlock(&local->mtx);
2475b1cc 2098
02219b3a
JB		 2099 /* existing TX TSPEC sessions no longer exist */
2100 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2101 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2102
2475b1cc 2103 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2104}
f0706e82 2105
3cf335d5
KV		 2106void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2107 struct ieee80211_hdr *hdr)
2108{
2109 /*
2110 * We can postpone the mgd.timer whenever receiving unicast frames
2111 * from AP because we know that the connection is working both ways
2112 * at that time. But multicast frames (and hence also beacons) must
2113 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2114 * data idle periods for sending the periodic probe request to the
2115 * AP we're connected to.
3cf335d5 2116 */
b291ba11
JB		 2117 if (is_multicast_ether_addr(hdr->addr1))
2118 return;
2119
be099e82 2120 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2121}
f0706e82 2122
4e5ff376
FF		 2123static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2124{
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2126 struct ieee80211_local *local = sdata->local;
4e5ff376 2127
133d40f9 2128 mutex_lock(&local->mtx);
392b9ffb
SG		 2129 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2130 goto out;
4e5ff376 2131
925e64c3 2132 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2133
2134 mutex_lock(&local->iflist_mtx);
2135 ieee80211_recalc_ps(local, -1);
2136 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2137
2138 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2139 goto out;
4e5ff376
FF		 2140
2141 /*
2142 * We've received a probe response, but are not sure whether
2143 * we have or will be receiving any beacons or data, so let's
2144 * schedule the timers again, just in case.
2145 */
2146 ieee80211_sta_reset_beacon_monitor(sdata);
2147
2148 mod_timer(&ifmgd->conn_mon_timer,
2149 round_jiffies_up(jiffies +
2150 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2151out:
133d40f9 2152 mutex_unlock(&local->mtx);
4e5ff376
FF		 2153}
2154
02219b3a
JB		 2155static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2156 struct ieee80211_hdr *hdr,
2157 u16 tx_time)
2158{
2159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2160 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2161 int ac = ieee80211_ac_from_tid(tid);
2162 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2163 unsigned long now = jiffies;
2164
2165 if (likely(!tx_tspec->admitted_time))
2166 return;
2167
2168 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2169 tx_tspec->consumed_tx_time = 0;
2170 tx_tspec->time_slice_start = now;
2171
2172 if (tx_tspec->downgraded) {
2173 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2174 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2175 }
2176 }
2177
2178 if (tx_tspec->downgraded)
2179 return;
2180
2181 tx_tspec->consumed_tx_time += tx_time;
2182
2183 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2184 tx_tspec->downgraded = true;
2185 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2186 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2187 }
2188}
2189
4e5ff376 2190void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2191 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2192{
02219b3a
JB		 2193 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2194
75706d0e 2195 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2196 return;
2197
4e5ff376
FF		 2198 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2199 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2200 if (ack)
cab1c7fd 2201 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2202 else
2203 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2204 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2205 return;
4e5ff376 2206 }
cab1c7fd
WD		 2207
2208 if (ack)
2209 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2210}
2211
a43abf29
ML		 2212static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2213{
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2215 const u8 *ssid;
f01a067d 2216 u8 *dst = ifmgd->associated->bssid;
180205bd 2217 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2218
2219 /*
2220 * Try sending broadcast probe requests for the last three
2221 * probe requests after the first ones failed since some
2222 * buggy APs only support broadcast probe requests.
2223 */
2224 if (ifmgd->probe_send_count >= unicast_limit)
2225 dst = NULL;
a43abf29 2226
4e5ff376
FF		 2227 /*
2228 * When the hardware reports an accurate Tx ACK status, it's
2229 * better to send a nullfunc frame instead of a probe request,
2230 * as it will kick us off the AP quickly if we aren't associated
2231 * anymore. The timeout will be reset if the frame is ACKed by
2232 * the AP.
2233 */
992e68bf
SD		 2234 ifmgd->probe_send_count++;
2235
04ac3c0e
FF		 2236 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2237 ifmgd->nullfunc_failed = false;
4e5ff376 2238 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2239 } else {
88c868c4
SG		 2240 int ssid_len;
2241
9caf0364 2242 rcu_read_lock();
4e5ff376 2243 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2244 if (WARN_ON_ONCE(ssid == NULL))
2245 ssid_len = 0;
2246 else
2247 ssid_len = ssid[1];
2248
a73f8e21 2249 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2250 ssid + 2, ssid_len, NULL,
1672c0e3 2251 0, (u32) -1, true, 0,
55de908a 2252 ifmgd->associated->channel, false);
9caf0364 2253 rcu_read_unlock();
4e5ff376 2254 }
a43abf29 2255
180205bd 2256 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2257 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2258}
2259
b291ba11
JB		 2260static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2261 bool beacon)
04de8381 2262{
04de8381 2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2264 bool already = false;
34bfc411 2265
9607e6b6 2266 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2267 return;
2268
8d61ffa5 2269 sdata_lock(sdata);
77fdaa12
JB		 2270
2271 if (!ifmgd->associated)
2272 goto out;
2273
133d40f9
SG		 2274 mutex_lock(&sdata->local->mtx);
2275
2276 if (sdata->local->tmp_channel || sdata->local->scanning) {
2277 mutex_unlock(&sdata->local->mtx);
2278 goto out;
2279 }
2280
a13fbe54 2281 if (beacon) {
bdcbd8e0 2282 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2283 "detected beacon loss from AP (missed %d beacons) - probing\n",
2284 beacon_loss_count);
bdcbd8e0 2285
98f03342 2286 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2287 }
04de8381 2288
b291ba11
JB		 2289 /*
2290 * The driver/our work has already reported this event or the
2291 * connection monitoring has kicked in and we have already sent
2292 * a probe request. Or maybe the AP died and the driver keeps
2293 * reporting until we disassociate...
2294 *
2295 * In either case we have to ignore the current call to this
2296 * function (except for setting the correct probe reason bit)
2297 * because otherwise we would reset the timer every time and
2298 * never check whether we received a probe response!
2299 */
392b9ffb 2300 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2301 already = true;
2302
12b5f34d
EP		 2303 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2304
133d40f9
SG		 2305 mutex_unlock(&sdata->local->mtx);
2306
b291ba11
JB		 2307 if (already)
2308 goto out;
2309
4e751843
JB		 2310 mutex_lock(&sdata->local->iflist_mtx);
2311 ieee80211_recalc_ps(sdata->local, -1);
2312 mutex_unlock(&sdata->local->iflist_mtx);
2313
a43abf29
ML		 2314 ifmgd->probe_send_count = 0;
2315 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2316 out:
8d61ffa5 2317 sdata_unlock(sdata);
04de8381
KV		 2318}
2319
a619a4c0
JO		 2320struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2321 struct ieee80211_vif *vif)
2322{
2323 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2325 struct cfg80211_bss *cbss;
a619a4c0
JO		 2326 struct sk_buff *skb;
2327 const u8 *ssid;
88c868c4 2328 int ssid_len;
a619a4c0
JO		 2329
2330 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2331 return NULL;
2332
8d61ffa5 2333 sdata_assert_lock(sdata);
a619a4c0 2334
d9b3b28b
EP		 2335 if (ifmgd->associated)
2336 cbss = ifmgd->associated;
2337 else if (ifmgd->auth_data)
2338 cbss = ifmgd->auth_data->bss;
2339 else if (ifmgd->assoc_data)
2340 cbss = ifmgd->assoc_data->bss;
2341 else
a619a4c0
JO		 2342 return NULL;
2343
9caf0364 2344 rcu_read_lock();
d9b3b28b 2345 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2346 if (WARN_ON_ONCE(ssid == NULL))
2347 ssid_len = 0;
2348 else
2349 ssid_len = ssid[1];
2350
a344d677 2351 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2352 (u32) -1, cbss->channel,
6b77863b 2353 ssid + 2, ssid_len,
85a237fe 2354 NULL, 0, true);
9caf0364 2355 rcu_read_unlock();
a619a4c0
JO		 2356
2357 return skb;
2358}
2359EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2360
a90faa9d
EG		 2361static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2362 const u8 *buf, size_t len, bool tx,
2363 u16 reason)
2364{
2365 struct ieee80211_event event = {
2366 .type = MLME_EVENT,
2367 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2368 .u.mlme.reason = reason,
2369 };
2370
2371 if (tx)
2372 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2373 else
2374 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2375
2376 drv_event_callback(sdata->local, sdata, &event);
2377}
2378
eef9e54c 2379static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2380{
59af6928 2381 struct ieee80211_local *local = sdata->local;
1e4dcd01 2382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2383 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2384
8d61ffa5 2385 sdata_lock(sdata);
1e4dcd01 2386 if (!ifmgd->associated) {
8d61ffa5 2387 sdata_unlock(sdata);
1e4dcd01
JO		 2388 return;
2389 }
2390
37ad3888
JB		 2391 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2392 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2393 true, frame_buf);
59af6928 2394 mutex_lock(&local->mtx);
7578d575 2395 sdata->vif.csa_active = false;
0c21e632 2396 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2397 if (sdata->csa_block_tx) {
2398 ieee80211_wake_vif_queues(local, sdata,
2399 IEEE80211_QUEUE_STOP_REASON_CSA);
2400 sdata->csa_block_tx = false;
2401 }
59af6928 2402 mutex_unlock(&local->mtx);
7da7cc1d 2403
a90faa9d
EG		 2404 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2405 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2406
8d61ffa5 2407 sdata_unlock(sdata);
1e4dcd01
JO		 2408}
2409
cc74c0c7 2410static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2411{
2412 struct ieee80211_sub_if_data *sdata =
2413 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2414 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416 struct sta_info *sta;
2417
2418 if (ifmgd->associated) {
30fa9047 2419 rcu_read_lock();
a85e1d55
PS		 2420 sta = sta_info_get(sdata, ifmgd->bssid);
2421 if (sta)
2422 sta->beacon_loss_count++;
30fa9047 2423 rcu_read_unlock();
a85e1d55 2424 }
b291ba11 2425
682bd38b 2426 if (ifmgd->connection_loss) {
882a7c69
JB		 2427 sdata_info(sdata, "Connection to AP %pM lost\n",
2428 ifmgd->bssid);
eef9e54c 2429 __ieee80211_disconnect(sdata);
882a7c69 2430 } else {
1e4dcd01 2431 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2432 }
2433}
2434
2435static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2436{
2437 struct ieee80211_sub_if_data *sdata =
2438 container_of(work, struct ieee80211_sub_if_data,
2439 u.mgd.csa_connection_drop_work);
2440
eef9e54c 2441 __ieee80211_disconnect(sdata);
b291ba11
JB		 2442}
2443
04de8381
KV		 2444void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2445{
2446 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2447 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2448
b5878a2d
JB		 2449 trace_api_beacon_loss(sdata);
2450
682bd38b 2451 sdata->u.mgd.connection_loss = false;
1e4dcd01 2452 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2453}
2454EXPORT_SYMBOL(ieee80211_beacon_loss);
2455
1e4dcd01
JO		 2456void ieee80211_connection_loss(struct ieee80211_vif *vif)
2457{
2458 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2459 struct ieee80211_hw *hw = &sdata->local->hw;
2460
b5878a2d
JB		 2461 trace_api_connection_loss(sdata);
2462
682bd38b 2463 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2464 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2465}
2466EXPORT_SYMBOL(ieee80211_connection_loss);
2467
2468
66e67e41
JB		 2469static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2470 bool assoc)
2471{
2472 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2473
8d61ffa5 2474 sdata_assert_lock(sdata);
66e67e41 2475
66e67e41 2476 if (!assoc) {
c1e140bf
EG		 2477 /*
2478 * we are not authenticated yet, the only timer that could be
2479 * running is the timeout for the authentication response which
2480 * which is not relevant anymore.
2481 */
2482 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2483 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2484
c84a67a2 2485 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2486 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2487 sdata->u.mgd.flags = 0;
34a3740d 2488 mutex_lock(&sdata->local->mtx);
55de908a 2489 ieee80211_vif_release_channel(sdata);
34a3740d 2490 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2491 }
2492
5b112d3d 2493 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2494 kfree(auth_data);
2495 sdata->u.mgd.auth_data = NULL;
2496}
2497
2498static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2499 struct ieee80211_mgmt *mgmt, size_t len)
2500{
1672c0e3 2501 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2502 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2503 u8 *pos;
2504 struct ieee802_11_elems elems;
1672c0e3 2505 u32 tx_flags = 0;
66e67e41
JB		 2506
2507 pos = mgmt->u.auth.variable;
b2e506bf 2508 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2509 if (!elems.challenge)
2510 return;
2511 auth_data->expected_transaction = 4;
a1845fc7 2512 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2513 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2514 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2515 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2516 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2517 elems.challenge - 2, elems.challenge_len + 2,
2518 auth_data->bss->bssid, auth_data->bss->bssid,
2519 auth_data->key, auth_data->key_len,
1672c0e3 2520 auth_data->key_idx, tx_flags);
66e67e41
JB		 2521}
2522
8d61ffa5
JB		 2523static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2524 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2525{
2526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2527 u8 bssid[ETH_ALEN];
2528 u16 auth_alg, auth_transaction, status_code;
2529 struct sta_info *sta;
a9409093
EG		 2530 struct ieee80211_event event = {
2531 .type = MLME_EVENT,
2532 .u.mlme.data = AUTH_EVENT,
2533 };
66e67e41 2534
8d61ffa5 2535 sdata_assert_lock(sdata);
66e67e41
JB		 2536
2537 if (len < 24 + 6)
8d61ffa5 2538 return;
66e67e41
JB		 2539
2540 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2541 return;
66e67e41
JB		 2542
2543 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2544
b203ca39 2545 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2546 return;
66e67e41
JB		 2547
2548 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2549 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2550 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2551
2552 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2553 auth_transaction != ifmgd->auth_data->expected_transaction) {
2554 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2555 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2556 auth_transaction,
2557 ifmgd->auth_data->expected_transaction);
8d61ffa5 2558 return;
0f4126e8 2559 }
66e67e41
JB		 2560
2561 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2562 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2563 mgmt->sa, status_code);
dac211ec 2564 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2565 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2566 event.u.mlme.status = MLME_DENIED;
2567 event.u.mlme.reason = status_code;
2568 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2569 return;
66e67e41
JB		 2570 }
2571
2572 switch (ifmgd->auth_data->algorithm) {
2573 case WLAN_AUTH_OPEN:
2574 case WLAN_AUTH_LEAP:
2575 case WLAN_AUTH_FT:
6b8ece3a 2576 case WLAN_AUTH_SAE:
66e67e41
JB		 2577 break;
2578 case WLAN_AUTH_SHARED_KEY:
2579 if (ifmgd->auth_data->expected_transaction != 4) {
2580 ieee80211_auth_challenge(sdata, mgmt, len);
2581 /* need another frame */
8d61ffa5 2582 return;
66e67e41
JB		 2583 }
2584 break;
2585 default:
2586 WARN_ONCE(1, "invalid auth alg %d",
2587 ifmgd->auth_data->algorithm);
8d61ffa5 2588 return;
66e67e41
JB		 2589 }
2590
a9409093
EG		 2591 event.u.mlme.status = MLME_SUCCESS;
2592 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2593 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2594 ifmgd->auth_data->done = true;
2595 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2596 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2597 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2598
6b8ece3a
JM		 2599 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2600 ifmgd->auth_data->expected_transaction != 2) {
2601 /*
2602 * Report auth frame to user space for processing since another
2603 * round of Authentication frames is still needed.
2604 */
6ff57cf8 2605 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2606 return;
6b8ece3a
JM		 2607 }
2608
66e67e41
JB		 2609 /* move station state to auth */
2610 mutex_lock(&sdata->local->sta_mtx);
2611 sta = sta_info_get(sdata, bssid);
2612 if (!sta) {
2613 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2614 goto out_err;
2615 }
2616 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2617 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2618 goto out_err;
2619 }
2620 mutex_unlock(&sdata->local->sta_mtx);
2621
6ff57cf8 2622 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2623 return;
66e67e41
JB		 2624 out_err:
2625 mutex_unlock(&sdata->local->sta_mtx);
2626 /* ignore frame -- wait for timeout */
66e67e41
JB		 2627}
2628
dfa1ad29
CO		 2629#define case_WLAN(type) \
2630 case WLAN_REASON_##type: return #type
2631
2632static const char *ieee80211_get_reason_code_string(u16 reason_code)
2633{
2634 switch (reason_code) {
2635 case_WLAN(UNSPECIFIED);
2636 case_WLAN(PREV_AUTH_NOT_VALID);
2637 case_WLAN(DEAUTH_LEAVING);
2638 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2639 case_WLAN(DISASSOC_AP_BUSY);
2640 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2641 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2642 case_WLAN(DISASSOC_STA_HAS_LEFT);
2643 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2644 case_WLAN(DISASSOC_BAD_POWER);
2645 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2646 case_WLAN(INVALID_IE);
2647 case_WLAN(MIC_FAILURE);
2648 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2649 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2650 case_WLAN(IE_DIFFERENT);
2651 case_WLAN(INVALID_GROUP_CIPHER);
2652 case_WLAN(INVALID_PAIRWISE_CIPHER);
2653 case_WLAN(INVALID_AKMP);
2654 case_WLAN(UNSUPP_RSN_VERSION);
2655 case_WLAN(INVALID_RSN_IE_CAP);
2656 case_WLAN(IEEE8021X_FAILED);
2657 case_WLAN(CIPHER_SUITE_REJECTED);
2658 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2659 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2660 case_WLAN(DISASSOC_LOW_ACK);
2661 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2662 case_WLAN(QSTA_LEAVE_QBSS);
2663 case_WLAN(QSTA_NOT_USE);
2664 case_WLAN(QSTA_REQUIRE_SETUP);
2665 case_WLAN(QSTA_TIMEOUT);
2666 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2667 case_WLAN(MESH_PEER_CANCELED);
2668 case_WLAN(MESH_MAX_PEERS);
2669 case_WLAN(MESH_CONFIG);
2670 case_WLAN(MESH_CLOSE);
2671 case_WLAN(MESH_MAX_RETRIES);
2672 case_WLAN(MESH_CONFIRM_TIMEOUT);
2673 case_WLAN(MESH_INVALID_GTK);
2674 case_WLAN(MESH_INCONSISTENT_PARAM);
2675 case_WLAN(MESH_INVALID_SECURITY);
2676 case_WLAN(MESH_PATH_ERROR);
2677 case_WLAN(MESH_PATH_NOFORWARD);
2678 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2679 case_WLAN(MAC_EXISTS_IN_MBSS);
2680 case_WLAN(MESH_CHAN_REGULATORY);
2681 case_WLAN(MESH_CHAN);
2682 default: return "<unknown>";
2683 }
2684}
66e67e41 2685
8d61ffa5
JB		 2686static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2687 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2688{
46900298 2689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2690 const u8 *bssid = NULL;
f0706e82
JB		 2691 u16 reason_code;
2692
8d61ffa5 2693 sdata_assert_lock(sdata);
66e67e41 2694
f4ea83dd 2695 if (len < 24 + 2)
8d61ffa5 2696 return;
f0706e82 2697
66e67e41 2698 if (!ifmgd->associated ||
b203ca39 2699 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2700 return;
77fdaa12 2701
0c1ad2ca 2702 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2703
2704 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2705
dfa1ad29
CO		 2706 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2707 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2708
37ad3888
JB		 2709 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2710
a90faa9d 2711 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2712}
2713
2714
8d61ffa5
JB		 2715static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2716 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2717{
46900298 2718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2719 u16 reason_code;
2720
8d61ffa5 2721 sdata_assert_lock(sdata);
77fdaa12 2722
66e67e41 2723 if (len < 24 + 2)
8d61ffa5 2724 return;
77fdaa12 2725
66e67e41 2726 if (!ifmgd->associated ||
b203ca39 2727 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2728 return;
f0706e82
JB		 2729
2730 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2731
bdcbd8e0
JB		 2732 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2733 mgmt->sa, reason_code);
f0706e82 2734
37ad3888
JB		 2735 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2736
a90faa9d 2737 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2738}
2739
c74d084f
CL		 2740static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2741 u8 *supp_rates, unsigned int supp_rates_len,
2742 u32 *rates, u32 *basic_rates,
2743 bool *have_higher_than_11mbit,
2103dec1
SW		 2744 int *min_rate, int *min_rate_index,
2745 int shift, u32 rate_flags)
c74d084f
CL		 2746{
2747 int i, j;
2748
2749 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2750 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2751 bool is_basic = !!(supp_rates[i] & 0x80);
2752
2103dec1 2753 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2754 *have_higher_than_11mbit = true;
2755
2756 /*
2757 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2758 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2759 *
2760 * Note: Even through the membership selector and the basic
2761 * rate flag share the same bit, they are not exactly
2762 * the same.
2763 */
2764 if (!!(supp_rates[i] & 0x80) &&
2765 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2766 continue;
2767
2768 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2769 struct ieee80211_rate *br;
2770 int brate;
2771
2772 br = &sband->bitrates[j];
2773 if ((rate_flags & br->flags) != rate_flags)
2774 continue;
2775
2776 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2777 if (brate == rate) {
c74d084f
CL		 2778 *rates |= BIT(j);
2779 if (is_basic)
2780 *basic_rates |= BIT(j);
2103dec1
SW		 2781 if ((rate * 5) < *min_rate) {
2782 *min_rate = rate * 5;
c74d084f
CL		 2783 *min_rate_index = j;
2784 }
2785 break;
2786 }
2787 }
2788 }
2789}
f0706e82 2790
66e67e41
JB		 2791static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2792 bool assoc)
2793{
2794 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2795
8d61ffa5 2796 sdata_assert_lock(sdata);
66e67e41 2797
66e67e41 2798 if (!assoc) {
c1e140bf
EG		 2799 /*
2800 * we are not associated yet, the only timer that could be
2801 * running is the timeout for the association response which
2802 * which is not relevant anymore.
2803 */
2804 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2805 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2806
c84a67a2 2807 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2808 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2809 sdata->u.mgd.flags = 0;
34a3740d 2810 mutex_lock(&sdata->local->mtx);
55de908a 2811 ieee80211_vif_release_channel(sdata);
34a3740d 2812 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2813 }
2814
2815 kfree(assoc_data);
2816 sdata->u.mgd.assoc_data = NULL;
2817}
2818
2819static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2820 struct cfg80211_bss *cbss,
af6b6374 2821 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2822{
46900298 2823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2824 struct ieee80211_local *local = sdata->local;
8318d78a 2825 struct ieee80211_supported_band *sband;
f0706e82 2826 struct sta_info *sta;
af6b6374 2827 u8 *pos;
af6b6374 2828 u16 capab_info, aid;
f0706e82 2829 struct ieee802_11_elems elems;
bda3933a 2830 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2831 const struct cfg80211_bss_ies *bss_ies = NULL;
2832 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2833 u32 changed = 0;
c74d084f 2834 int err;
35d865af 2835 bool ret;
f0706e82 2836
af6b6374 2837 /* AssocResp and ReassocResp have identical structure */
f0706e82 2838
f0706e82 2839 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2840 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2841
1dd84aa2 2842 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2843 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2844 aid);
1dd84aa2
JB		 2845 aid &= ~(BIT(15) | BIT(14));
2846
05cb9108
JB		 2847 ifmgd->broken_ap = false;
2848
2849 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2850 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2851 aid);
05cb9108
JB		 2852 aid = 0;
2853 ifmgd->broken_ap = true;
2854 }
2855
af6b6374 2856 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2857 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2858
f0706e82 2859 if (!elems.supp_rates) {
bdcbd8e0 2860 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2861 return false;
f0706e82
JB		 2862 }
2863
46900298 2864 ifmgd->aid = aid;
9041c1fa
AN		 2865 ifmgd->tdls_chan_switch_prohibited =
2866 elems.ext_capab && elems.ext_capab_len >= 5 &&
2867 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2868
35d865af
JB		 2869 /*
2870 * Some APs are erroneously not including some information in their
2871 * (re)association response frames. Try to recover by using the data
2872 * from the beacon or probe response. This seems to afflict mobile
2873 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2874 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2875 */
2876 if ((assoc_data->wmm && !elems.wmm_param) ||
2877 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2878 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2879 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2880 (!elems.vht_cap_elem || !elems.vht_operation))) {
2881 const struct cfg80211_bss_ies *ies;
2882 struct ieee802_11_elems bss_elems;
2883
2884 rcu_read_lock();
2885 ies = rcu_dereference(cbss->ies);
2886 if (ies)
2887 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2888 GFP_ATOMIC);
2889 rcu_read_unlock();
2890 if (!bss_ies)
2891 return false;
2892
2893 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2894 false, &bss_elems);
2895 if (assoc_data->wmm &&
2896 !elems.wmm_param && bss_elems.wmm_param) {
2897 elems.wmm_param = bss_elems.wmm_param;
2898 sdata_info(sdata,
2899 "AP bug: WMM param missing from AssocResp\n");
2900 }
2901
2902 /*
2903 * Also check if we requested HT/VHT, otherwise the AP doesn't
2904 * have to include the IEs in the (re)association response.
2905 */
2906 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2907 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2908 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2909 sdata_info(sdata,
2910 "AP bug: HT capability missing from AssocResp\n");
2911 }
2912 if (!elems.ht_operation && bss_elems.ht_operation &&
2913 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2914 elems.ht_operation = bss_elems.ht_operation;
2915 sdata_info(sdata,
2916 "AP bug: HT operation missing from AssocResp\n");
2917 }
2918 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2919 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2920 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2921 sdata_info(sdata,
2922 "AP bug: VHT capa missing from AssocResp\n");
2923 }
2924 if (!elems.vht_operation && bss_elems.vht_operation &&
2925 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2926 elems.vht_operation = bss_elems.vht_operation;
2927 sdata_info(sdata,
2928 "AP bug: VHT operation missing from AssocResp\n");
2929 }
2930 }
2931
30eb1dc2
JB		 2932 /*
2933 * We previously checked these in the beacon/probe response, so
2934 * they should be present here. This is just a safety net.
2935 */
2936 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2937 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2938 sdata_info(sdata,
35d865af
JB		 2939 "HT AP is missing WMM params or HT capability/operation\n");
2940 ret = false;
2941 goto out;
30eb1dc2
JB		 2942 }
2943
2944 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2945 (!elems.vht_cap_elem || !elems.vht_operation)) {
2946 sdata_info(sdata,
35d865af
JB		 2947 "VHT AP is missing VHT capability/operation\n");
2948 ret = false;
2949 goto out;
30eb1dc2
JB		 2950 }
2951
2a33bee2
GE		 2952 mutex_lock(&sdata->local->sta_mtx);
2953 /*
2954 * station info was already allocated and inserted before
2955 * the association and should be available to us
2956 */
7852e361 2957 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2958 if (WARN_ON(!sta)) {
2959 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2960 ret = false;
2961 goto out;
77fdaa12 2962 }
05e5e883 2963
55de908a 2964 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2965
30eb1dc2 2966 /* Set up internal HT/VHT capabilities */
a8243b72 2967 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2968 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2969 elems.ht_cap_elem, sta);
64f68e5d 2970
818255ea
MP		 2971 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2972 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2973 elems.vht_cap_elem, sta);
818255ea 2974
30eb1dc2
JB		 2975 /*
2976 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2977 * in their association response, so ignore that data for our own
2978 * configuration. If it changed since the last beacon, we'll get the
2979 * next beacon and update then.
2980 */
1128958d 2981
bee7f586
JB		 2982 /*
2983 * If an operating mode notification IE is present, override the
2984 * NSS calculation (that would be done in rate_control_rate_init())
2985 * and use the # of streams from that element.
2986 */
2987 if (elems.opmode_notif &&
2988 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2989 u8 nss;
2990
2991 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2992 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2993 nss += 1;
2994 sta->sta.rx_nss = nss;
2995 }
2996
4b7679a5 2997 rate_control_rate_init(sta);
f0706e82 2998
64a8cef4 2999 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3000 set_sta_flag(sta, WLAN_STA_MFP);
64a8cef4
SJ		 3001 sta->sta.mfp = true;
3002 } else {
3003 sta->sta.mfp = false;
3004 }
5394af4d 3005
527871d7 3006 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3007
3e4d40fa 3008 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3009 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3010 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3011 if (err) {
bdcbd8e0
JB		 3012 sdata_info(sdata,
3013 "failed to move station %pM to desired state\n",
3014 sta->sta.addr);
c8987876
JB		 3015 WARN_ON(__sta_info_destroy(sta));
3016 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3017 ret = false;
3018 goto out;
c8987876
JB		 3019 }
3020
7852e361 3021 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3022
f2176d72
JO		 3023 /*
3024 * Always handle WMM once after association regardless
3025 * of the first value the AP uses. Setting -1 here has
3026 * that effect because the AP values is an unsigned
3027 * 4-bit value.
3028 */
3029 ifmgd->wmm_last_param_set = -1;
3030
095d81ce 3031 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3032 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3033 elems.wmm_param_len);
aa837e1d 3034 else
3abead59
JB		 3035 ieee80211_set_wmm_default(sdata, false);
3036 changed |= BSS_CHANGED_QOS;
f0706e82 3037
60f8b39c
JB		 3038 /* set AID and assoc capability,
3039 * ieee80211_set_associated() will tell the driver */
3040 bss_conf->aid = aid;
3041 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3042 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3043
d524215f
FF		 3044 /*
3045 * If we're using 4-addr mode, let the AP know that we're
3046 * doing so, so that it can create the STA VLAN on its side
3047 */
3048 if (ifmgd->use_4addr)
3049 ieee80211_send_4addr_nullfunc(local, sdata);
3050
15b7b062 3051 /*
b291ba11
JB		 3052 * Start timer to probe the connection to the AP now.
3053 * Also start the timer that will detect beacon loss.
15b7b062 3054 */
b291ba11 3055 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3056 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3057
35d865af
JB		 3058 ret = true;
3059 out:
3060 kfree(bss_ies);
3061 return ret;
f0706e82
JB		 3062}
3063
8d61ffa5
JB		 3064static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3065 struct ieee80211_mgmt *mgmt,
3066 size_t len)
66e67e41
JB		 3067{
3068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3069 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3070 u16 capab_info, status_code, aid;
3071 struct ieee802_11_elems elems;
b0b6aa2c 3072 int ac, uapsd_queues = -1;
66e67e41
JB		 3073 u8 *pos;
3074 bool reassoc;
8d61ffa5 3075 struct cfg80211_bss *bss;
d0d1a12f
EG		 3076 struct ieee80211_event event = {
3077 .type = MLME_EVENT,
3078 .u.mlme.data = ASSOC_EVENT,
3079 };
66e67e41 3080
8d61ffa5 3081 sdata_assert_lock(sdata);
66e67e41
JB		 3082
3083 if (!assoc_data)
8d61ffa5 3084 return;
b203ca39 3085 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3086 return;
66e67e41
JB		 3087
3088 /*
3089 * AssocResp and ReassocResp have identical structure, so process both
3090 * of them in this function.
3091 */
3092
3093 if (len < 24 + 6)
8d61ffa5 3094 return;
66e67e41
JB		 3095
3096 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3097 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3098 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3099 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3100
bdcbd8e0
JB		 3101 sdata_info(sdata,
3102 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3103 reassoc ? "Rea" : "A", mgmt->sa,
3104 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3105
3106 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3107 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3108
3109 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3110 elems.timeout_int &&
3111 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3112 u32 tu, ms;
79ba1d89 3113 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3114 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3115 sdata_info(sdata,
3116 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3117 mgmt->sa, tu, ms);
66e67e41 3118 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3119 assoc_data->timeout_started = true;
66e67e41 3120 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3121 run_again(sdata, assoc_data->timeout);
3122 return;
66e67e41
JB		 3123 }
3124
8d61ffa5 3125 bss = assoc_data->bss;
66e67e41
JB		 3126
3127 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3128 sdata_info(sdata, "%pM denied association (code=%d)\n",
3129 mgmt->sa, status_code);
66e67e41 3130 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3131 event.u.mlme.status = MLME_DENIED;
3132 event.u.mlme.reason = status_code;
3133 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3134 } else {
8d61ffa5 3135 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3136 /* oops -- internal error -- send timeout for now */
10a9109f 3137 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3138 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3139 return;
66e67e41 3140 }
d0d1a12f
EG		 3141 event.u.mlme.status = MLME_SUCCESS;
3142 drv_event_callback(sdata->local, sdata, &event);
635d999f 3143 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3144
3145 /*
3146 * destroy assoc_data afterwards, as otherwise an idle
3147 * recalc after assoc_data is NULL but before associated
3148 * is set can cause the interface to go idle
3149 */
3150 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3151
3152 /* get uapsd queues configuration */
3153 uapsd_queues = 0;
3154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3155 if (sdata->tx_conf[ac].uapsd)
3156 uapsd_queues |= BIT(ac);
66e67e41
JB		 3157 }
3158
b0b6aa2c 3159 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3160}
8e3c1b77 3161
98c8fccf 3162static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3163 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3164 struct ieee80211_rx_status *rx_status,
d45c4172 3165 struct ieee802_11_elems *elems)
98c8fccf
JB		 3166{
3167 struct ieee80211_local *local = sdata->local;
c2b13452 3168 struct ieee80211_bss *bss;
98c8fccf 3169 struct ieee80211_channel *channel;
56007a02 3170
8d61ffa5 3171 sdata_assert_lock(sdata);
b4f286a1 3172
3afc2167
EG		 3173 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3174 if (!channel)
98c8fccf
JB		 3175 return;
3176
98c8fccf 3177 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3178 channel);
817cee76 3179 if (bss) {
817cee76 3180 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3181 ieee80211_rx_bss_put(local, bss);
817cee76 3182 }
f0706e82
JB		 3183}
3184
3185
f698d856 3186static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3187 struct sk_buff *skb)
f0706e82 3188{
af6b6374 3189 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3190 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3191 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3192 size_t baselen, len = skb->len;
ae6a44e3
EK		 3193 struct ieee802_11_elems elems;
3194
15b7b062
KV		 3195 ifmgd = &sdata->u.mgd;
3196
8d61ffa5 3197 sdata_assert_lock(sdata);
77fdaa12 3198
b203ca39 3199 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3200 return; /* ignore ProbeResp to foreign address */
3201
ae6a44e3
EK		 3202 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3203 if (baselen > len)
3204 return;
3205
3206 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3207 false, &elems);
ae6a44e3 3208
d45c4172 3209 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3210
77fdaa12 3211 if (ifmgd->associated &&
b203ca39 3212 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3213 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3214
3215 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3216 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3217 /* got probe response, continue with auth */
bdcbd8e0 3218 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3219 ifmgd->auth_data->tries = 0;
3220 ifmgd->auth_data->timeout = jiffies;
89afe614 3221 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3222 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3223 }
f0706e82
JB		 3224}
3225
d91f36db
JB		 3226/*
3227 * This is the canonical list of information elements we care about,
3228 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3229 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3230 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3231 * changes to requested client power.
d91f36db
JB		 3232 *
3233 * We implement beacon filtering in software since that means we can
3234 * avoid processing the frame here and in cfg80211, and userspace
3235 * will not be able to tell whether the hardware supports it or not.
3236 *
3237 * XXX: This list needs to be dynamic -- userspace needs to be able to
3238 * add items it requires. It also needs to be able to tell us to
3239 * look out for other vendor IEs.
3240 */
3241static const u64 care_about_ies =
1d4df3a5
JB		 3242 (1ULL << WLAN_EID_COUNTRY) |
3243 (1ULL << WLAN_EID_ERP_INFO) |
3244 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3245 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3246 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3247 (1ULL << WLAN_EID_HT_OPERATION) |
3248 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3249
8d61ffa5
JB		 3250static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3251 struct ieee80211_mgmt *mgmt, size_t len,
3252 struct ieee80211_rx_status *rx_status)
f0706e82 3253{
d91f36db 3254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3255 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3256 size_t baselen;
3257 struct ieee802_11_elems elems;
f698d856 3258 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3259 struct ieee80211_chanctx_conf *chanctx_conf;
3260 struct ieee80211_channel *chan;
bee7f586 3261 struct sta_info *sta;
471b3efd 3262 u32 changed = 0;
f87ad637 3263 bool erp_valid;
7a5158ef 3264 u8 erp_value = 0;
d91f36db 3265 u32 ncrc;
77fdaa12 3266 u8 *bssid;
8d61ffa5 3267 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3268
8d61ffa5 3269 sdata_assert_lock(sdata);
f0706e82 3270
ae6a44e3
EK		 3271 /* Process beacon from the current BSS */
3272 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3273 if (baselen > len)
8d61ffa5 3274 return;
ae6a44e3 3275
55de908a
JB		 3276 rcu_read_lock();
3277 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3278 if (!chanctx_conf) {
3279 rcu_read_unlock();
8d61ffa5 3280 return;
55de908a
JB		 3281 }
3282
4bf88530 3283 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3284 rcu_read_unlock();
8d61ffa5 3285 return;
55de908a 3286 }
4bf88530 3287 chan = chanctx_conf->def.chan;
55de908a 3288 rcu_read_unlock();
f0706e82 3289
c65dd147 3290 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3291 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3292 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3293 len - baselen, false, &elems);
77fdaa12 3294
d45c4172 3295 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3296 if (elems.tim && !elems.parse_error) {
3297 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3298 ifmgd->dtim_period = tim_ie->dtim_period;
3299 }
989c6505 3300 ifmgd->have_beacon = true;
c65dd147 3301 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3302 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3303 sdata->vif.bss_conf.sync_tsf =
3304 le64_to_cpu(mgmt->u.beacon.timestamp);
3305 sdata->vif.bss_conf.sync_device_ts =
3306 rx_status->device_timestamp;
3307 if (elems.tim)
3308 sdata->vif.bss_conf.sync_dtim_count =
3309 elems.tim->dtim_count;
3310 else
3311 sdata->vif.bss_conf.sync_dtim_count = 0;
3312 }
66e67e41
JB		 3313 /* continue assoc process */
3314 ifmgd->assoc_data->timeout = jiffies;
89afe614 3315 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3316 run_again(sdata, ifmgd->assoc_data->timeout);
3317 return;
66e67e41 3318 }
77fdaa12 3319
66e67e41 3320 if (!ifmgd->associated ||
b203ca39 3321 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3322 return;
66e67e41 3323 bssid = ifmgd->associated->bssid;
f0706e82 3324
17e4ec14
JM		 3325 /* Track average RSSI from the Beacon frames of the current AP */
3326 ifmgd->last_beacon_signal = rx_status->signal;
3327 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3328 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3329 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3330 ifmgd->last_cqm_event_signal = 0;
391a200a 3331 ifmgd->count_beacon_signal = 1;
615f7b9b 3332 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3333 } else {
3334 ifmgd->ave_beacon_signal =
3335 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3336 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3337 ifmgd->ave_beacon_signal) / 16;
391a200a 3338 ifmgd->count_beacon_signal++;
17e4ec14 3339 }
615f7b9b
MV		 3340
3341 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3342 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3343 int sig = ifmgd->ave_beacon_signal;
3344 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3345 struct ieee80211_event event = {
3346 .type = RSSI_EVENT,
3347 };
615f7b9b
MV		 3348
3349 /*
3350 * if signal crosses either of the boundaries, invoke callback
3351 * with appropriate parameters
3352 */
3353 if (sig > ifmgd->rssi_max_thold &&
3354 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3355 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3356 event.u.rssi.data = RSSI_EVENT_HIGH;
3357 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3358 } else if (sig < ifmgd->rssi_min_thold &&
3359 (last_sig >= ifmgd->rssi_max_thold ||
3360 last_sig == 0)) {
3361 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3362 event.u.rssi.data = RSSI_EVENT_LOW;
3363 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3364 }
3365 }
3366
17e4ec14 3367 if (bss_conf->cqm_rssi_thold &&
391a200a 3368 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3369 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3370 int sig = ifmgd->ave_beacon_signal / 16;
3371 int last_event = ifmgd->last_cqm_event_signal;
3372 int thold = bss_conf->cqm_rssi_thold;
3373 int hyst = bss_conf->cqm_rssi_hyst;
3374 if (sig < thold &&
3375 (last_event == 0 || sig < last_event - hyst)) {
3376 ifmgd->last_cqm_event_signal = sig;
3377 ieee80211_cqm_rssi_notify(
3378 &sdata->vif,
3379 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3380 GFP_KERNEL);
3381 } else if (sig > thold &&
3382 (last_event == 0 || sig > last_event + hyst)) {
3383 ifmgd->last_cqm_event_signal = sig;
3384 ieee80211_cqm_rssi_notify(
3385 &sdata->vif,
3386 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3387 GFP_KERNEL);
3388 }
3389 }
3390
392b9ffb 3391 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3392 mlme_dbg_ratelimited(sdata,
112c31f0 3393 "cancelling AP probe due to a received beacon\n");
392b9ffb 3394 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3395 }
3396
b291ba11
JB		 3397 /*
3398 * Push the beacon loss detection into the future since
3399 * we are processing a beacon from the AP just now.
3400 */
d3a910a8 3401 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3402
d91f36db
JB		 3403 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3404 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3405 len - baselen, false, &elems,
d91f36db
JB		 3406 care_about_ies, ncrc);
3407
25c9c875 3408 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3409 bool directed_tim = ieee80211_check_tim(elems.tim,
3410 elems.tim_len,
3411 ifmgd->aid);
1fb3606b 3412 if (directed_tim) {
572e0012 3413 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3414 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3415 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3416 ieee80211_hw_config(local,
3417 IEEE80211_CONF_CHANGE_PS);
3418 }
572e0012 3419 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3420 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3421 local->pspolling = true;
3422
3423 /*
3424 * Here is assumed that the driver will be
3425 * able to send ps-poll frame and receive a
3426 * response even though power save mode is
3427 * enabled, but some drivers might require
3428 * to disable power save here. This needs
3429 * to be investigated.
3430 */
3431 ieee80211_send_pspoll(local, sdata);
3432 }
a97b77b9
VN		 3433 }
3434 }
7a5158ef 3435
488dd7b5 3436 if (sdata->vif.p2p) {
67baf663 3437 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3438 int ret;
3439
3440 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3441 len - baselen,
3442 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3443 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3444 if (ret >= 2) {
3445 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3446 /* valid noa_attr and index changed */
3447 sdata->u.mgd.p2p_noa_index = noa.index;
3448 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3449 changed |= BSS_CHANGED_P2P_PS;
3450 /*
3451 * make sure we update all information, the CRC
3452 * mechanism doesn't look at P2P attributes.
3453 */
3454 ifmgd->beacon_crc_valid = false;
3455 }
3456 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3457 /* noa_attr not found and we had valid noa_attr before */
3458 sdata->u.mgd.p2p_noa_index = -1;
3459 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3460 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3461 ifmgd->beacon_crc_valid = false;
3462 }
3463 }
3464
0c21e632
LC		 3465 if (ifmgd->csa_waiting_bcn)
3466 ieee80211_chswitch_post_beacon(sdata);
3467
2ecc3905
AB		 3468 /*
3469 * Update beacon timing and dtim count on every beacon appearance. This
3470 * will allow the driver to use the most updated values. Do it before
3471 * comparing this one with last received beacon.
3472 * IMPORTANT: These parameters would possibly be out of sync by the time
3473 * the driver will use them. The synchronized view is currently
3474 * guaranteed only in certain callbacks.
3475 */
3476 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3477 sdata->vif.bss_conf.sync_tsf =
3478 le64_to_cpu(mgmt->u.beacon.timestamp);
3479 sdata->vif.bss_conf.sync_device_ts =
3480 rx_status->device_timestamp;
3481 if (elems.tim)
3482 sdata->vif.bss_conf.sync_dtim_count =
3483 elems.tim->dtim_count;
3484 else
3485 sdata->vif.bss_conf.sync_dtim_count = 0;
3486 }
3487
d8ec4433 3488 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3489 return;
30196673 3490 ifmgd->beacon_crc = ncrc;
d8ec4433 3491 ifmgd->beacon_crc_valid = true;
30196673 3492
d45c4172 3493 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3494
d70b7616 3495 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3496 rx_status->device_timestamp,
d70b7616
JB		 3497 &elems, true);
3498
095d81ce
JB		 3499 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3500 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3501 elems.wmm_param_len))
3502 changed |= BSS_CHANGED_QOS;
3503
c65dd147
EG		 3504 /*
3505 * If we haven't had a beacon before, tell the driver about the
ef429dad 3506 * DTIM period (and beacon timing if desired) now.
c65dd147 3507 */
989c6505 3508 if (!ifmgd->have_beacon) {
c65dd147
EG		 3509 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3510 if (elems.tim)
3511 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3512 else
3513 bss_conf->dtim_period = 1;
ef429dad 3514
989c6505
AB		 3515 changed |= BSS_CHANGED_BEACON_INFO;
3516 ifmgd->have_beacon = true;
482a9c74
AB		 3517
3518 mutex_lock(&local->iflist_mtx);
3519 ieee80211_recalc_ps(local, -1);
3520 mutex_unlock(&local->iflist_mtx);
3521
ce857888 3522 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3523 }
3524
1946bed9 3525 if (elems.erp_info) {
7a5158ef
JB		 3526 erp_valid = true;
3527 erp_value = elems.erp_info[0];
3528 } else {
3529 erp_valid = false;
50c4afb9 3530 }
7a5158ef
JB		 3531 changed |= ieee80211_handle_bss_capability(sdata,
3532 le16_to_cpu(mgmt->u.beacon.capab_info),
3533 erp_valid, erp_value);
f0706e82 3534
1128958d 3535 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3536 sta = sta_info_get(sdata, bssid);
3537
53b954ee
EP		 3538 if (ieee80211_config_bw(sdata, sta,
3539 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3540 elems.vht_operation, bssid, &changed)) {
3541 mutex_unlock(&local->sta_mtx);
3542 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3543 WLAN_REASON_DEAUTH_LEAVING,
3544 true, deauth_buf);
a90faa9d
EG		 3545 ieee80211_report_disconnect(sdata, deauth_buf,
3546 sizeof(deauth_buf), true,
3547 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3548 return;
30eb1dc2 3549 }
bee7f586
JB		 3550
3551 if (sta && elems.opmode_notif)
3552 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3553 rx_status->band, true);
1128958d 3554 mutex_unlock(&local->sta_mtx);
d3c990fb 3555
24a4e400
SG		 3556 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3557 elems.country_elem,
3558 elems.country_elem_len,
c8d65917
SG		 3559 elems.pwr_constr_elem,
3560 elems.cisco_dtpc_elem);
3f2355cb 3561
471b3efd 3562 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3563}
3564
1fa57d01
JB		 3565void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3566 struct sk_buff *skb)
f0706e82
JB		 3567{
3568 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3569 struct ieee80211_mgmt *mgmt;
3570 u16 fc;
1b3a2e49
JB		 3571 struct ieee802_11_elems elems;
3572 int ies_len;
f0706e82 3573
f0706e82
JB		 3574 rx_status = (struct ieee80211_rx_status *) skb->cb;
3575 mgmt = (struct ieee80211_mgmt *) skb->data;
3576 fc = le16_to_cpu(mgmt->frame_control);
3577
8d61ffa5 3578 sdata_lock(sdata);
77fdaa12 3579
66e67e41
JB		 3580 switch (fc & IEEE80211_FCTL_STYPE) {
3581 case IEEE80211_STYPE_BEACON:
8d61ffa5 3582 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3583 break;
3584 case IEEE80211_STYPE_PROBE_RESP:
3585 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3586 break;
3587 case IEEE80211_STYPE_AUTH:
8d61ffa5 3588 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3589 break;
3590 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3591 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3592 break;
3593 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3594 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3595 break;
3596 case IEEE80211_STYPE_ASSOC_RESP:
3597 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3598 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3599 break;
3600 case IEEE80211_STYPE_ACTION:
37799e52 3601 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3602 ies_len = skb->len -
3603 offsetof(struct ieee80211_mgmt,
3604 u.action.u.chan_switch.variable);
37799e52
JB		 3605
3606 if (ies_len < 0)
3607 break;
3608
3609 ieee802_11_parse_elems(
3610 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3611 ies_len, true, &elems);
37799e52
JB		 3612
3613 if (elems.parse_error)
3614 break;
3615
1b3a2e49 3616 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3617 rx_status->mactime,
3618 rx_status->device_timestamp,
3619 &elems, false);
1b3a2e49
JB		 3620 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3621 ies_len = skb->len -
3622 offsetof(struct ieee80211_mgmt,
3623 u.action.u.ext_chan_switch.variable);
3624
3625 if (ies_len < 0)
3626 break;
3627
3628 ieee802_11_parse_elems(
3629 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3630 ies_len, true, &elems);
1b3a2e49
JB		 3631
3632 if (elems.parse_error)
3633 break;
3634
3635 /* for the handling code pretend this was also an IE */
3636 elems.ext_chansw_ie =
3637 &mgmt->u.action.u.ext_chan_switch.data;
3638
66e67e41 3639 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3640 rx_status->mactime,
3641 rx_status->device_timestamp,
3642 &elems, false);
77fdaa12 3643 }
37799e52 3644 break;
77fdaa12 3645 }
8d61ffa5 3646 sdata_unlock(sdata);
f0706e82
JB		 3647}
3648
9c6bd790 3649static void ieee80211_sta_timer(unsigned long data)
f0706e82 3650{
60f8b39c
JB		 3651 struct ieee80211_sub_if_data *sdata =
3652 (struct ieee80211_sub_if_data *) data;
5bb644a0 3653
9b7d72c1 3654 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3655}
3656
04ac3c0e 3657static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3658 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3659{
6ae16775 3660 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3661
37ad3888 3662 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3663 tx, frame_buf);
37ad3888 3664
a90faa9d
EG		 3665 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3666 reason);
04ac3c0e
FF		 3667}
3668
66e67e41
JB		 3669static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3670{
3671 struct ieee80211_local *local = sdata->local;
3672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3673 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3674 u32 tx_flags = 0;
66e67e41 3675
8d61ffa5 3676 sdata_assert_lock(sdata);
66e67e41
JB		 3677
3678 if (WARN_ON_ONCE(!auth_data))
3679 return -EINVAL;
3680
66e67e41
JB		 3681 auth_data->tries++;
3682
3683 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3684 sdata_info(sdata, "authentication with %pM timed out\n",
3685 auth_data->bss->bssid);
66e67e41
JB		 3686
3687 /*
3688 * Most likely AP is not in the range so remove the
3689 * bss struct for that AP.
3690 */
3691 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3692
3693 return -ETIMEDOUT;
3694 }
3695
a1845fc7
JB		 3696 drv_mgd_prepare_tx(local, sdata);
3697
66e67e41 3698 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3699 u16 trans = 1;
3700 u16 status = 0;
3701
bdcbd8e0
JB		 3702 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3703 auth_data->bss->bssid, auth_data->tries,
3704 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3705
3706 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3707
3708 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3709 trans = auth_data->sae_trans;
3710 status = auth_data->sae_status;
3711 auth_data->expected_transaction = trans;
3712 }
3713
6211dd12
SG		 3714 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3715 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3716 IEEE80211_TX_INTFL_MLME_CONN_TX;
3717
6b8ece3a
JM		 3718 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3719 auth_data->data, auth_data->data_len,
66e67e41 3720 auth_data->bss->bssid,
1672c0e3
JB		 3721 auth_data->bss->bssid, NULL, 0, 0,
3722 tx_flags);
66e67e41
JB		 3723 } else {
3724 const u8 *ssidie;
3725
bdcbd8e0
JB		 3726 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3727 auth_data->bss->bssid, auth_data->tries,
3728 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3729
9caf0364 3730 rcu_read_lock();
66e67e41 3731 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3732 if (!ssidie) {
3733 rcu_read_unlock();
66e67e41 3734 return -EINVAL;
9caf0364 3735 }
66e67e41
JB		 3736 /*
3737 * Direct probe is sent to broadcast address as some APs
3738 * will not answer to direct packet in unassociated state.
3739 */
a344d677
JB		 3740 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3741 ssidie + 2, ssidie[1],
6211dd12 3742 NULL, 0, (u32) -1, true, 0,
55de908a 3743 auth_data->bss->channel, false);
9caf0364 3744 rcu_read_unlock();
66e67e41
JB		 3745 }
3746
6211dd12 3747 if (tx_flags == 0) {
1672c0e3 3748 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3749 auth_data->timeout_started = true;
8d61ffa5 3750 run_again(sdata, auth_data->timeout);
89afe614 3751 } else {
cb236d2d
JB		 3752 auth_data->timeout =
3753 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3754 auth_data->timeout_started = true;
3755 run_again(sdata, auth_data->timeout);
1672c0e3 3756 }
66e67e41
JB		 3757
3758 return 0;
3759}
3760
3761static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3762{
3763 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3764 struct ieee80211_local *local = sdata->local;
3765
8d61ffa5 3766 sdata_assert_lock(sdata);
66e67e41 3767
66e67e41
JB		 3768 assoc_data->tries++;
3769 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3770 sdata_info(sdata, "association with %pM timed out\n",
3771 assoc_data->bss->bssid);
66e67e41
JB		 3772
3773 /*
3774 * Most likely AP is not in the range so remove the
3775 * bss struct for that AP.
3776 */
3777 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3778
3779 return -ETIMEDOUT;
3780 }
3781
bdcbd8e0
JB		 3782 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3783 assoc_data->bss->bssid, assoc_data->tries,
3784 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3785 ieee80211_send_assoc(sdata);
3786
1672c0e3
JB		 3787 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3788 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3789 assoc_data->timeout_started = true;
8d61ffa5 3790 run_again(sdata, assoc_data->timeout);
89afe614 3791 } else {
cb236d2d
JB		 3792 assoc_data->timeout =
3793 round_jiffies_up(jiffies +
3794 IEEE80211_ASSOC_TIMEOUT_LONG);
3795 assoc_data->timeout_started = true;
3796 run_again(sdata, assoc_data->timeout);
1672c0e3 3797 }
66e67e41
JB		 3798
3799 return 0;
3800}
3801
1672c0e3
JB		 3802void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3803 __le16 fc, bool acked)
3804{
3805 struct ieee80211_local *local = sdata->local;
3806
3807 sdata->u.mgd.status_fc = fc;
3808 sdata->u.mgd.status_acked = acked;
3809 sdata->u.mgd.status_received = true;
3810
3811 ieee80211_queue_work(&local->hw, &sdata->work);
3812}
3813
1fa57d01 3814void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3815{
9c6bd790 3816 struct ieee80211_local *local = sdata->local;
1fa57d01 3817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3818
8d61ffa5 3819 sdata_lock(sdata);
77fdaa12 3820
1672c0e3
JB		 3821 if (ifmgd->status_received) {
3822 __le16 fc = ifmgd->status_fc;
3823 bool status_acked = ifmgd->status_acked;
3824
3825 ifmgd->status_received = false;
3826 if (ifmgd->auth_data &&
3827 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3828 if (status_acked) {
3829 ifmgd->auth_data->timeout =
3830 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3831 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3832 } else {
3833 ifmgd->auth_data->timeout = jiffies - 1;
3834 }
89afe614 3835 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3836 } else if (ifmgd->assoc_data &&
3837 (ieee80211_is_assoc_req(fc) ||
3838 ieee80211_is_reassoc_req(fc))) {
3839 if (status_acked) {
3840 ifmgd->assoc_data->timeout =
3841 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3842 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3843 } else {
3844 ifmgd->assoc_data->timeout = jiffies - 1;
3845 }
89afe614 3846 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3847 }
3848 }
3849
89afe614 3850 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3851 time_after(jiffies, ifmgd->auth_data->timeout)) {
3852 if (ifmgd->auth_data->done) {
3853 /*
3854 * ok ... we waited for assoc but userspace didn't,
3855 * so let's just kill the auth data
3856 */
3857 ieee80211_destroy_auth_data(sdata, false);
3858 } else if (ieee80211_probe_auth(sdata)) {
3859 u8 bssid[ETH_ALEN];
a9409093
EG		 3860 struct ieee80211_event event = {
3861 .type = MLME_EVENT,
3862 .u.mlme.data = AUTH_EVENT,
3863 .u.mlme.status = MLME_TIMEOUT,
3864 };
66e67e41
JB		 3865
3866 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3867
3868 ieee80211_destroy_auth_data(sdata, false);
3869
6ff57cf8 3870 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3871 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3872 }
89afe614 3873 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3874 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3875
89afe614 3876 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3877 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3878 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3879 ieee80211_do_assoc(sdata)) {
959867fa 3880 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3881 struct ieee80211_event event = {
3882 .type = MLME_EVENT,
3883 .u.mlme.data = ASSOC_EVENT,
3884 .u.mlme.status = MLME_TIMEOUT,
3885 };
66e67e41
JB		 3886
3887 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3888 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3889 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3890 }
89afe614 3891 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3892 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3893
392b9ffb 3894 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3895 ifmgd->associated) {
a43abf29 3896 u8 bssid[ETH_ALEN];
72a8a3ed 3897 int max_tries;
a43abf29 3898
0c1ad2ca 3899 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3900
72a8a3ed 3901 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3902 max_tries = max_nullfunc_tries;
72a8a3ed 3903 else
180205bd 3904 max_tries = max_probe_tries;
72a8a3ed 3905
4e5ff376
FF		 3906 /* ACK received for nullfunc probing frame */
3907 if (!ifmgd->probe_send_count)
3908 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3909 else if (ifmgd->nullfunc_failed) {
3910 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3911 mlme_dbg(sdata,
3912 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3913 bssid, ifmgd->probe_send_count,
3914 max_tries);
04ac3c0e
FF		 3915 ieee80211_mgd_probe_ap_send(sdata);
3916 } else {
bdcbd8e0
JB		 3917 mlme_dbg(sdata,
3918 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3919 bssid);
95acac61 3920 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3921 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3922 false);
04ac3c0e
FF		 3923 }
3924 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3925 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3926 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3927 mlme_dbg(sdata,
3928 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3929 bssid, probe_wait_ms);
95acac61 3930 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3931 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3932 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3933 mlme_dbg(sdata,
3934 "No probe response from AP %pM after %dms, try %d/%i\n",
3935 bssid, probe_wait_ms,
3936 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3937 ieee80211_mgd_probe_ap_send(sdata);
3938 } else {
b291ba11
JB		 3939 /*
3940 * We actually lost the connection ... or did we?
3941 * Let's make sure!
3942 */
b38afa87
BG		 3943 wiphy_debug(local->hw.wiphy,
3944 "%s: No probe response from AP %pM"
3945 " after %dms, disconnecting.\n",
3946 sdata->name,
180205bd 3947 bssid, probe_wait_ms);
04ac3c0e 3948
95acac61 3949 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3950 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3951 }
3952 }
3953
8d61ffa5 3954 sdata_unlock(sdata);
f0706e82
JB		 3955}
3956
b291ba11
JB		 3957static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3958{
3959 struct ieee80211_sub_if_data *sdata =
3960 (struct ieee80211_sub_if_data *) data;
0c21e632 3961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3962
0c21e632 3963 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3964 return;
3965
682bd38b 3966 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3967 ieee80211_queue_work(&sdata->local->hw,
3968 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3969}
3970
3971static void ieee80211_sta_conn_mon_timer(unsigned long data)
3972{
3973 struct ieee80211_sub_if_data *sdata =
3974 (struct ieee80211_sub_if_data *) data;
3975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3976 struct ieee80211_local *local = sdata->local;
3977
0c21e632 3978 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3979 return;
3980
42935eca 3981 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3982}
3983
3984static void ieee80211_sta_monitor_work(struct work_struct *work)
3985{
3986 struct ieee80211_sub_if_data *sdata =
3987 container_of(work, struct ieee80211_sub_if_data,
3988 u.mgd.monitor_work);
3989
3990 ieee80211_mgd_probe_ap(sdata, false);
3991}
3992
9c6bd790
JB		 3993static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3994{
494f1fe5
EP		 3995 u32 flags;
3996
ad935687 3997 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3998 __ieee80211_stop_poll(sdata);
ad935687 3999
b291ba11 4000 /* let's probe the connection once */
494f1fe5
EP		 4001 flags = sdata->local->hw.flags;
4002 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
4003 ieee80211_queue_work(&sdata->local->hw,
4004 &sdata->u.mgd.monitor_work);
b291ba11 4005 /* and do all the other regular work too */
64592c8f 4006 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4007 }
9c6bd790 4008}
f0706e82 4009
b8360ab8 4010#ifdef CONFIG_PM
1a1cb744
JB		 4011void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4012{
4013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4014 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4015
4016 sdata_lock(sdata);
4017
c52666ae
EG		 4018 if (ifmgd->auth_data || ifmgd->assoc_data) {
4019 const u8 *bssid = ifmgd->auth_data ?
4020 ifmgd->auth_data->bss->bssid :
4021 ifmgd->assoc_data->bss->bssid;
4022
1a1cb744 4023 /*
c52666ae
EG		 4024 * If we are trying to authenticate / associate while suspending,
4025 * cfg80211 won't know and won't actually abort those attempts,
4026 * thus we need to do that ourselves.
1a1cb744 4027 */
c52666ae 4028 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4029 IEEE80211_STYPE_DEAUTH,
4030 WLAN_REASON_DEAUTH_LEAVING,
4031 false, frame_buf);
c52666ae
EG		 4032 if (ifmgd->assoc_data)
4033 ieee80211_destroy_assoc_data(sdata, false);
4034 if (ifmgd->auth_data)
4035 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4036 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4037 IEEE80211_DEAUTH_FRAME_LEN);
4038 }
4039
be72afe0
JB		 4040 /* This is a bit of a hack - we should find a better and more generic
4041 * solution to this. Normally when suspending, cfg80211 will in fact
4042 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4043 * auth (not so important) or assoc (this is the problem) process.
4044 *
4045 * As a consequence, it can happen that we are in the process of both
4046 * associating and suspending, and receive an association response
4047 * after cfg80211 has checked if it needs to disconnect, but before
4048 * we actually set the flag to drop incoming frames. This will then
4049 * cause the workqueue flush to process the association response in
4050 * the suspend, resulting in a successful association just before it
4051 * tries to remove the interface from the driver, which now though
4052 * has a channel context assigned ... this results in issues.
4053 *
4054 * To work around this (for now) simply deauth here again if we're
4055 * now connected.
4056 */
4057 if (ifmgd->associated && !sdata->local->wowlan) {
4058 u8 bssid[ETH_ALEN];
4059 struct cfg80211_deauth_request req = {
4060 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4061 .bssid = bssid,
4062 };
4063
4064 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4065 ieee80211_mgd_deauth(sdata, &req);
4066 }
4067
1a1cb744
JB		 4068 sdata_unlock(sdata);
4069}
4070
b8360ab8
JB		 4071void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4072{
4073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4074
8d61ffa5 4075 sdata_lock(sdata);
b8360ab8 4076 if (!ifmgd->associated) {
8d61ffa5 4077 sdata_unlock(sdata);
b8360ab8
JB		 4078 return;
4079 }
4080
4081 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4082 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4083 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4084 ieee80211_sta_connection_lost(sdata,
4085 ifmgd->associated->bssid,
4086 WLAN_REASON_UNSPECIFIED,
4087 true);
8d61ffa5 4088 sdata_unlock(sdata);
b8360ab8
JB		 4089 return;
4090 }
8d61ffa5 4091 sdata_unlock(sdata);
b8360ab8
JB		 4092}
4093#endif
4094
9c6bd790
JB		 4095/* interface setup */
4096void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4097{
46900298 4098 struct ieee80211_if_managed *ifmgd;
988c0f72 4099
46900298 4100 ifmgd = &sdata->u.mgd;
b291ba11 4101 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4102 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4103 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4104 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4105 INIT_WORK(&ifmgd->csa_connection_drop_work,
4106 ieee80211_csa_connection_drop_work);
687da132 4107 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4108 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4109 ieee80211_tdls_peer_del_work);
46900298 4110 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4111 (unsigned long) sdata);
b291ba11
JB		 4112 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4113 (unsigned long) sdata);
4114 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4115 (unsigned long) sdata);
46900298 4116 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4117 (unsigned long) sdata);
02219b3a
JB		 4118 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4119 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4120
ab1faead 4121 ifmgd->flags = 0;
1478acb3 4122 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4123 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4124 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4125 ifmgd->p2p_noa_index = -1;
bbbdff9e 4126
0d8614b4 4127 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4128 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4129 else
4130 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4131
4132 /* Setup TDLS data */
4133 spin_lock_init(&ifmgd->teardown_lock);
4134 ifmgd->teardown_skb = NULL;
4135 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4136}
4137
77fdaa12
JB		 4138/* scan finished notification */
4139void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4140{
31ee67a1 4141 struct ieee80211_sub_if_data *sdata;
60f8b39c 4142
77fdaa12
JB		 4143 /* Restart STA timers */
4144 rcu_read_lock();
370bd005
BG		 4145 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4146 if (ieee80211_sdata_running(sdata))
4147 ieee80211_restart_sta_timer(sdata);
4148 }
77fdaa12
JB		 4149 rcu_read_unlock();
4150}
60f8b39c 4151
77fdaa12
JB		 4152int ieee80211_max_network_latency(struct notifier_block *nb,
4153 unsigned long data, void *dummy)
4154{
4155 s32 latency_usec = (s32) data;
4156 struct ieee80211_local *local =
4157 container_of(nb, struct ieee80211_local,
4158 network_latency_notifier);
1fa6f4af 4159
77fdaa12
JB		 4160 mutex_lock(&local->iflist_mtx);
4161 ieee80211_recalc_ps(local, latency_usec);
4162 mutex_unlock(&local->iflist_mtx);
dfe67012 4163
8bd811aa 4164 return NOTIFY_OK;
9c6bd790
JB		 4165}
4166
f2d9d270
JB		 4167static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4168 struct cfg80211_bss *cbss)
4169{
4170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4171 const u8 *ht_cap_ie, *vht_cap_ie;
4172 const struct ieee80211_ht_cap *ht_cap;
4173 const struct ieee80211_vht_cap *vht_cap;
4174 u8 chains = 1;
4175
4176 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4177 return chains;
4178
9caf0364 4179 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4180 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4181 ht_cap = (void *)(ht_cap_ie + 2);
4182 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4183 /*
4184 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4185 * "Tx Unequal Modulation Supported" fields.
4186 */
4187 }
4188
4189 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4190 return chains;
4191
9caf0364 4192 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4193 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4194 u8 nss;
4195 u16 tx_mcs_map;
4196
4197 vht_cap = (void *)(vht_cap_ie + 2);
4198 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4199 for (nss = 8; nss > 0; nss--) {
4200 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4201 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4202 break;
4203 }
4204 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4205 chains = max(chains, nss);
4206 }
4207
4208 return chains;
4209}
4210
b17166a7
JB		 4211static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4212 struct cfg80211_bss *cbss)
a1cf775d
JB		 4213{
4214 struct ieee80211_local *local = sdata->local;
4215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4216 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4217 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4218 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4219 struct ieee80211_supported_band *sband;
4bf88530 4220 struct cfg80211_chan_def chandef;
f2d9d270 4221 int ret;
a1cf775d 4222
24398e39
JB		 4223 sband = local->hw.wiphy->bands[cbss->channel->band];
4224
f2d9d270
JB		 4225 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4226 IEEE80211_STA_DISABLE_80P80MHZ |
4227 IEEE80211_STA_DISABLE_160MHZ);
4228
9caf0364
JB		 4229 rcu_read_lock();
4230
f2d9d270
JB		 4231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4232 sband->ht_cap.ht_supported) {
53b954ee 4233 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4234
9caf0364 4235 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4236 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4237 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4238
53b954ee
EP		 4239 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4240 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4241 ht_cap = (void *)(ht_cap_ie + 2);
4242
4243 if (!ht_cap) {
08e6effa
JB		 4244 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4245 ht_oper = NULL;
4246 }
24398e39
JB		 4247 }
4248
f2d9d270
JB		 4249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4250 sband->vht_cap.vht_supported) {
08e6effa 4251 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4252
9caf0364
JB		 4253 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4254 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4255 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4256 vht_oper = (void *)(vht_oper_ie + 2);
4257 if (vht_oper && !ht_oper) {
4258 vht_oper = NULL;
bdcbd8e0 4259 sdata_info(sdata,
f2d9d270 4260 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4261 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4262 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4263 }
08e6effa
JB		 4264
4265 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4266 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4267 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4268 vht_oper = NULL;
4269 }
24398e39
JB		 4270 }
4271
f2d9d270
JB		 4272 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4273 cbss->channel,
53b954ee 4274 ht_cap, ht_oper, vht_oper,
5cdaed1e 4275 &chandef, false);
04ecd257 4276
f2d9d270
JB		 4277 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4278 local->rx_chains);
24398e39 4279
9caf0364
JB		 4280 rcu_read_unlock();
4281
04ecd257
JB		 4282 /* will change later if needed */
4283 sdata->smps_mode = IEEE80211_SMPS_OFF;
4284
34a3740d 4285 mutex_lock(&local->mtx);
f2d9d270
JB		 4286 /*
4287 * If this fails (possibly due to channel context sharing
4288 * on incompatible channels, e.g. 80+80 and 160 sharing the
4289 * same control channel) try to use a smaller bandwidth.
4290 */
4291 ret = ieee80211_vif_use_channel(sdata, &chandef,
4292 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4293
4294 /* don't downgrade for 5 and 10 MHz channels, though. */
4295 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4296 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4297 goto out;
0418a445 4298
d601cd8d 4299 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4300 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4301 ret = ieee80211_vif_use_channel(sdata, &chandef,
4302 IEEE80211_CHANCTX_SHARED);
4303 }
34a3740d
JB		 4304 out:
4305 mutex_unlock(&local->mtx);
f2d9d270 4306 return ret;
b17166a7
JB		 4307}
4308
4309static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4310 struct cfg80211_bss *cbss, bool assoc)
4311{
4312 struct ieee80211_local *local = sdata->local;
4313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4314 struct ieee80211_bss *bss = (void *)cbss->priv;
4315 struct sta_info *new_sta = NULL;
179b8fc7
CRI		 4316 struct ieee80211_supported_band *sband;
4317 struct ieee80211_sta_ht_cap sta_ht_cap;
4318 bool have_sta = false, is_override = false;
b17166a7
JB		 4319 int err;
4320
179b8fc7
CRI		 4321 sband = local->hw.wiphy->bands[cbss->channel->band];
4322
b17166a7
JB		 4323 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4324 return -EINVAL;
4325
4326 if (assoc) {
4327 rcu_read_lock();
4328 have_sta = sta_info_get(sdata, cbss->bssid);
4329 rcu_read_unlock();
4330 }
4331
4332 if (!have_sta) {
4333 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4334 if (!new_sta)
4335 return -ENOMEM;
4336 }
179b8fc7
CRI		 4337
4338 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4339 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4340
4341 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4342 (sband->ht_cap.cap &
4343 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4344
4345 if (new_sta || is_override) {
4346 err = ieee80211_prep_channel(sdata, cbss);
4347 if (err) {
4348 if (new_sta)
4349 sta_info_free(local, new_sta);
4350 return -EINVAL;
4351 }
4352 }
4353
13e0c8e3 4354 if (new_sta) {
5d6a1b06
JB		 4355 u32 rates = 0, basic_rates = 0;
4356 bool have_higher_than_11mbit;
4357 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4358 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4359 const struct cfg80211_bss_ies *ies;
179b8fc7 4360 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4361 u32 rate_flags;
b17166a7 4362
2103dec1
SW		 4363 rcu_read_lock();
4364 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4365 if (WARN_ON(!chanctx_conf)) {
4366 rcu_read_unlock();
c368ddaa 4367 sta_info_free(local, new_sta);
2103dec1
SW		 4368 return -EINVAL;
4369 }
4370 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4371 rcu_read_unlock();
5d6a1b06 4372
5d6a1b06
JB		 4373 ieee80211_get_rates(sband, bss->supp_rates,
4374 bss->supp_rates_len,
4375 &rates, &basic_rates,
4376 &have_higher_than_11mbit,
2103dec1
SW		 4377 &min_rate, &min_rate_index,
4378 shift, rate_flags);
5d6a1b06
JB		 4379
4380 /*
4381 * This used to be a workaround for basic rates missing
4382 * in the association response frame. Now that we no
4383 * longer use the basic rates from there, it probably
4384 * doesn't happen any more, but keep the workaround so
4385 * in case some *other* APs are buggy in different ways
4386 * we can connect -- with a warning.
4387 */
4388 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4389 sdata_info(sdata,
4390 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4391 basic_rates = BIT(min_rate_index);
4392 }
4393
13e0c8e3 4394 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4395 sdata->vif.bss_conf.basic_rates = basic_rates;
4396
4397 /* cf. IEEE 802.11 9.2.12 */
55de908a 4398 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4399 have_higher_than_11mbit)
4400 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4401 else
4402 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4403
4404 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4405
8c358bcd
JB		 4406 /* set timing information */
4407 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4408 rcu_read_lock();
ef429dad
JB		 4409 ies = rcu_dereference(cbss->beacon_ies);
4410 if (ies) {
4411 const u8 *tim_ie;
4412
4413 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4414 sdata->vif.bss_conf.sync_device_ts =
4415 bss->device_ts_beacon;
4416 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4417 ies->data, ies->len);
4418 if (tim_ie && tim_ie[1] >= 2)
4419 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4420 else
4421 sdata->vif.bss_conf.sync_dtim_count = 0;
4422 } else if (!(local->hw.flags &
4423 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4424 ies = rcu_dereference(cbss->proberesp_ies);
4425 /* must be non-NULL since beacon IEs were NULL */
4426 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4427 sdata->vif.bss_conf.sync_device_ts =
4428 bss->device_ts_presp;
4429 sdata->vif.bss_conf.sync_dtim_count = 0;
4430 } else {
4431 sdata->vif.bss_conf.sync_tsf = 0;
4432 sdata->vif.bss_conf.sync_device_ts = 0;
4433 sdata->vif.bss_conf.sync_dtim_count = 0;
4434 }
8cef2c9d 4435 rcu_read_unlock();
8c358bcd
JB		 4436
4437 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4438 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4439 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4440 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4441
4442 if (assoc)
13e0c8e3 4443 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4444
13e0c8e3
JB		 4445 err = sta_info_insert(new_sta);
4446 new_sta = NULL;
a1cf775d 4447 if (err) {
bdcbd8e0
JB		 4448 sdata_info(sdata,
4449 "failed to insert STA entry for the AP (error %d)\n",
4450 err);
a1cf775d
JB		 4451 return err;
4452 }
4453 } else
b203ca39 4454 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4455
7d830a19
DS		 4456 /* Cancel scan to ensure that nothing interferes with connection */
4457 if (local->scanning)
4458 ieee80211_scan_cancel(local);
4459
a1cf775d
JB		 4460 return 0;
4461}
4462
77fdaa12
JB		 4463/* config hooks */
4464int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4465 struct cfg80211_auth_request *req)
9c6bd790 4466{
66e67e41
JB		 4467 struct ieee80211_local *local = sdata->local;
4468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4469 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4470 u16 auth_alg;
66e67e41
JB		 4471 int err;
4472
4473 /* prepare auth data structure */
9c6bd790 4474
77fdaa12
JB		 4475 switch (req->auth_type) {
4476 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4477 auth_alg = WLAN_AUTH_OPEN;
4478 break;
4479 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4480 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4481 return -EOPNOTSUPP;
77fdaa12
JB		 4482 auth_alg = WLAN_AUTH_SHARED_KEY;
4483 break;
4484 case NL80211_AUTHTYPE_FT:
4485 auth_alg = WLAN_AUTH_FT;
4486 break;
4487 case NL80211_AUTHTYPE_NETWORK_EAP:
4488 auth_alg = WLAN_AUTH_LEAP;
4489 break;
6b8ece3a
JM		 4490 case NL80211_AUTHTYPE_SAE:
4491 auth_alg = WLAN_AUTH_SAE;
4492 break;
77fdaa12
JB		 4493 default:
4494 return -EOPNOTSUPP;
60f8b39c 4495 }
77fdaa12 4496
6b8ece3a
JM		 4497 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4498 req->ie_len, GFP_KERNEL);
66e67e41 4499 if (!auth_data)
9c6bd790 4500 return -ENOMEM;
77fdaa12 4501
66e67e41 4502 auth_data->bss = req->bss;
77fdaa12 4503
6b8ece3a
JM		 4504 if (req->sae_data_len >= 4) {
4505 __le16 *pos = (__le16 *) req->sae_data;
4506 auth_data->sae_trans = le16_to_cpu(pos[0]);
4507 auth_data->sae_status = le16_to_cpu(pos[1]);
4508 memcpy(auth_data->data, req->sae_data + 4,
4509 req->sae_data_len - 4);
4510 auth_data->data_len += req->sae_data_len - 4;
4511 }
4512
77fdaa12 4513 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4514 memcpy(&auth_data->data[auth_data->data_len],
4515 req->ie, req->ie_len);
4516 auth_data->data_len += req->ie_len;
9c6bd790 4517 }
77fdaa12 4518
fffd0934 4519 if (req->key && req->key_len) {
66e67e41
JB		 4520 auth_data->key_len = req->key_len;
4521 auth_data->key_idx = req->key_idx;
4522 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4523 }
4524
66e67e41 4525 auth_data->algorithm = auth_alg;
60f8b39c 4526
66e67e41 4527 /* try to authenticate/probe */
2a33bee2 4528
66e67e41
JB		 4529 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4530 ifmgd->assoc_data) {
4531 err = -EBUSY;
4532 goto err_free;
2a33bee2
GE		 4533 }
4534
66e67e41
JB		 4535 if (ifmgd->auth_data)
4536 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4537
66e67e41
JB		 4538 /* prep auth_data so we don't go into idle on disassoc */
4539 ifmgd->auth_data = auth_data;
af6b6374 4540
7b119dc0
JB		 4541 if (ifmgd->associated) {
4542 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4543
4544 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4545 WLAN_REASON_UNSPECIFIED,
4546 false, frame_buf);
4547
a90faa9d
EG		 4548 ieee80211_report_disconnect(sdata, frame_buf,
4549 sizeof(frame_buf), true,
4550 WLAN_REASON_UNSPECIFIED);
7b119dc0 4551 }
af6b6374 4552
bdcbd8e0 4553 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4554
a1cf775d
JB		 4555 err = ieee80211_prep_connection(sdata, req->bss, false);
4556 if (err)
66e67e41 4557 goto err_clear;
af6b6374 4558
66e67e41
JB		 4559 err = ieee80211_probe_auth(sdata);
4560 if (err) {
66e67e41
JB		 4561 sta_info_destroy_addr(sdata, req->bss->bssid);
4562 goto err_clear;
4563 }
4564
4565 /* hold our own reference */
5b112d3d 4566 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4567 return 0;
66e67e41
JB		 4568
4569 err_clear:
c84a67a2 4570 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4571 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4572 ifmgd->auth_data = NULL;
4573 err_free:
4574 kfree(auth_data);
66e67e41 4575 return err;
af6b6374
JB		 4576}
4577
095d81ce
JB		 4578static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4579 const u8 *wmm_param, int len)
4580{
4581 const u8 *pos;
4582 size_t left;
4583
4584 if (len < 8)
4585 return false;
4586
4587 if (wmm_param[5] != 1 /* version */)
4588 return false;
4589
4590 pos = wmm_param + 8;
4591 left = len - 8;
4592
4593 for (; left >= 4; left -= 4, pos += 4) {
4594 u8 aifsn = pos[0] & 0x0f;
4595 u8 ecwmin = pos[1] & 0x0f;
4596 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4597 int aci = (pos[0] >> 5) & 0x03;
4598
4599 if (aifsn < 2) {
4600 sdata_info(sdata,
4601 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4602 aifsn, aci);
4603 return false;
4604 }
4605 if (ecwmin > ecwmax) {
4606 sdata_info(sdata,
4607 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4608 ecwmin, ecwmax, aci);
4609 return false;
4610 }
4611 }
4612
4613 return true;
4614}
4615
77fdaa12
JB		 4616int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4617 struct cfg80211_assoc_request *req)
f0706e82 4618{
66e67e41 4619 struct ieee80211_local *local = sdata->local;
77fdaa12 4620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4621 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4622 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4623 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4624 struct ieee80211_supported_band *sband;
b08fbbd8 4625 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4626 int i, err;
f0706e82 4627
66e67e41
JB		 4628 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4629 if (!assoc_data)
4630 return -ENOMEM;
4631
9caf0364
JB		 4632 rcu_read_lock();
4633 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4634 if (!ssidie) {
4635 rcu_read_unlock();
4636 kfree(assoc_data);
4637 return -EINVAL;
4638 }
4639 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4640 assoc_data->ssid_len = ssidie[1];
4641 rcu_read_unlock();
4642
7b119dc0
JB		 4643 if (ifmgd->associated) {
4644 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4645
4646 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4647 WLAN_REASON_UNSPECIFIED,
4648 false, frame_buf);
4649
a90faa9d
EG		 4650 ieee80211_report_disconnect(sdata, frame_buf,
4651 sizeof(frame_buf), true,
4652 WLAN_REASON_UNSPECIFIED);
7b119dc0 4653 }
66e67e41
JB		 4654
4655 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4656 err = -EBUSY;
4657 goto err_free;
af6b6374 4658 }
77fdaa12 4659
66e67e41
JB		 4660 if (ifmgd->assoc_data) {
4661 err = -EBUSY;
4662 goto err_free;
4663 }
77fdaa12 4664
66e67e41
JB		 4665 if (ifmgd->auth_data) {
4666 bool match;
4667
4668 /* keep sta info, bssid if matching */
b203ca39 4669 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4670 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4671 }
4672
66e67e41 4673 /* prepare assoc data */
095d81ce 4674
d8ec4433
JO		 4675 ifmgd->beacon_crc_valid = false;
4676
095d81ce
JB		 4677 assoc_data->wmm = bss->wmm_used &&
4678 (local->hw.queues >= IEEE80211_NUM_ACS);
4679 if (assoc_data->wmm) {
4680 /* try to check validity of WMM params IE */
4681 const struct cfg80211_bss_ies *ies;
4682 const u8 *wp, *start, *end;
4683
4684 rcu_read_lock();
4685 ies = rcu_dereference(req->bss->ies);
4686 start = ies->data;
4687 end = start + ies->len;
4688
4689 while (true) {
4690 wp = cfg80211_find_vendor_ie(
4691 WLAN_OUI_MICROSOFT,
4692 WLAN_OUI_TYPE_MICROSOFT_WMM,
4693 start, end - start);
4694 if (!wp)
4695 break;
4696 start = wp + wp[1] + 2;
4697 /* if this IE is too short, try the next */
4698 if (wp[1] <= 4)
4699 continue;
4700 /* if this IE is WMM params, we found what we wanted */
4701 if (wp[6] == 1)
4702 break;
4703 }
4704
4705 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4706 wp[1] - 2)) {
4707 assoc_data->wmm = false;
4708 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4709 }
4710 rcu_read_unlock();
4711 }
4712
de5036aa
JB		 4713 /*
4714 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4715 * We still associate in non-HT mode (11a/b/g) if any one of these
4716 * ciphers is configured as pairwise.
4717 * We can set this to true for non-11n hardware, that'll be checked
4718 * separately along with the peer capabilities.
4719 */
1c4cb928 4720 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4721 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4722 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4723 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4725 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4726 netdev_info(sdata->dev,
d545daba 4727 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4728 }
4729 }
77fdaa12 4730
d545daba 4731 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4732 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4733 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4734 }
ef96a842 4735
dd5ecfea
JB		 4736 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4737 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4738
4e74bfdb
JB		 4739 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4740 sband = local->hw.wiphy->bands[req->bss->channel->band];
4741 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4742 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4743 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4744 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4745 if (!bss->wmm_used &&
4746 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4747 netdev_info(sdata->dev,
4748 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4749 }
4e74bfdb 4750
d545daba
MP		 4751 /* disable VHT if we don't support it or the AP doesn't use WMM */
4752 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4753 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4754 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4755 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4756 if (!bss->wmm_used &&
4757 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4758 netdev_info(sdata->dev,
4759 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4760 }
4761
ef96a842
BG		 4762 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4763 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4764 sizeof(ifmgd->ht_capa_mask));
4765
dd5ecfea
JB		 4766 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4767 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4768 sizeof(ifmgd->vht_capa_mask));
4769
77fdaa12 4770 if (req->ie && req->ie_len) {
66e67e41
JB		 4771 memcpy(assoc_data->ie, req->ie, req->ie_len);
4772 assoc_data->ie_len = req->ie_len;
4773 }
f679f65d 4774
66e67e41 4775 assoc_data->bss = req->bss;
f679f65d 4776
af6b6374
JB		 4777 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4778 if (ifmgd->powersave)
04ecd257 4779 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4780 else
04ecd257 4781 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4782 } else
04ecd257 4783 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4784
66e67e41 4785 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4786 assoc_data->supp_rates = bss->supp_rates;
4787 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4788
9caf0364 4789 rcu_read_lock();
9dde6423
JB		 4790 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4791 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4792 assoc_data->ap_ht_param =
4793 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4794 else
a8243b72 4795 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4796 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4797 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4798 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4799 sizeof(struct ieee80211_vht_cap));
4800 else
4801 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4802 rcu_read_unlock();
63f170e0 4803
848955cc
JB		 4804 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4805 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4806 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4807 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4808
ab13315a 4809 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4810 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4811 assoc_data->uapsd = true;
ab13315a
KV		 4812 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4813 } else {
76f0303d 4814 assoc_data->uapsd = false;
ab13315a
KV		 4815 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4816 }
4817
77fdaa12 4818 if (req->prev_bssid)
66e67e41 4819 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4820
4821 if (req->use_mfp) {
4822 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4823 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4824 } else {
4825 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4826 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4827 }
4828
cd2f5dd7
AK		 4829 if (req->flags & ASSOC_REQ_USE_RRM)
4830 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4831 else
4832 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4833
77fdaa12
JB		 4834 if (req->crypto.control_port)
4835 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4836 else
4837 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4838
a621fa4d
JB		 4839 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4840 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4841 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4842 sdata->vif.type);
a621fa4d 4843
66e67e41
JB		 4844 /* kick off associate process */
4845
4846 ifmgd->assoc_data = assoc_data;
826262c3 4847 ifmgd->dtim_period = 0;
989c6505 4848 ifmgd->have_beacon = false;
66e67e41 4849
a1cf775d
JB		 4850 err = ieee80211_prep_connection(sdata, req->bss, true);
4851 if (err)
4852 goto err_clear;
66e67e41 4853
c65dd147
EG		 4854 rcu_read_lock();
4855 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4856
c65dd147
EG		 4857 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4858 !beacon_ies) {
4859 /*
4860 * Wait up to one beacon interval ...
4861 * should this be more if we miss one?
4862 */
4863 sdata_info(sdata, "waiting for beacon from %pM\n",
4864 ifmgd->bssid);
4865 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4866 assoc_data->timeout_started = true;
c65dd147
EG		 4867 assoc_data->need_beacon = true;
4868 } else if (beacon_ies) {
4869 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4870 beacon_ies->data,
4871 beacon_ies->len);
ef429dad
JB		 4872 u8 dtim_count = 0;
4873
c65dd147
EG		 4874 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4875 const struct ieee80211_tim_ie *tim;
4876 tim = (void *)(tim_ie + 2);
4877 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4878 dtim_count = tim->dtim_count;
826262c3 4879 }
989c6505 4880 ifmgd->have_beacon = true;
66e67e41 4881 assoc_data->timeout = jiffies;
89afe614 4882 assoc_data->timeout_started = true;
ef429dad
JB		 4883
4884 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4885 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4886 sdata->vif.bss_conf.sync_device_ts =
4887 bss->device_ts_beacon;
4888 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4889 }
c65dd147
EG		 4890 } else {
4891 assoc_data->timeout = jiffies;
89afe614 4892 assoc_data->timeout_started = true;
66e67e41 4893 }
c65dd147
EG		 4894 rcu_read_unlock();
4895
8d61ffa5 4896 run_again(sdata, assoc_data->timeout);
66e67e41 4897
fcff4f10
PS		 4898 if (bss->corrupt_data) {
4899 char *corrupt_type = "data";
4900 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4901 if (bss->corrupt_data &
4902 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4903 corrupt_type = "beacon and probe response";
4904 else
4905 corrupt_type = "beacon";
4906 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4907 corrupt_type = "probe response";
bdcbd8e0
JB		 4908 sdata_info(sdata, "associating with AP with corrupt %s\n",
4909 corrupt_type);
fcff4f10
PS		 4910 }
4911
8d61ffa5 4912 return 0;
66e67e41 4913 err_clear:
c84a67a2 4914 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4915 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4916 ifmgd->assoc_data = NULL;
4917 err_free:
4918 kfree(assoc_data);
66e67e41 4919 return err;
f0706e82
JB		 4920}
4921
77fdaa12 4922int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4923 struct cfg80211_deauth_request *req)
f0706e82 4924{
46900298 4925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4926 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4927 bool tx = !req->local_state_change;
f0706e82 4928
c9c3a060
JB		 4929 if (ifmgd->auth_data &&
4930 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4931 sdata_info(sdata,
4932 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4933 req->bssid, req->reason_code,
4934 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4935
8c7d857c 4936 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4937 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4938 IEEE80211_STYPE_DEAUTH,
6863255b 4939 req->reason_code, tx,
37ad3888 4940 frame_buf);
86552017 4941 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4942 ieee80211_report_disconnect(sdata, frame_buf,
4943 sizeof(frame_buf), true,
4944 req->reason_code);
86552017 4945
c9c3a060 4946 return 0;
8c7d857c
EG		 4947 }
4948
86552017
JB		 4949 if (ifmgd->associated &&
4950 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4951 sdata_info(sdata,
4952 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4953 req->bssid, req->reason_code,
4954 ieee80211_get_reason_code_string(req->reason_code));
4955
86552017
JB		 4956 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4957 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4958 ieee80211_report_disconnect(sdata, frame_buf,
4959 sizeof(frame_buf), true,
4960 req->reason_code);
c9c3a060
JB		 4961 return 0;
4962 }
86552017 4963
c9c3a060 4964 return -ENOTCONN;
f0706e82 4965}
84363e6e 4966
77fdaa12 4967int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4968 struct cfg80211_disassoc_request *req)
9c6bd790 4969{
77fdaa12 4970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4971 u8 bssid[ETH_ALEN];
6ae16775 4972 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4973
8d8b261a
JB		 4974 /*
4975 * cfg80211 should catch this ... but it's racy since
4976 * we can receive a disassoc frame, process it, hand it
4977 * to cfg80211 while that's in a locked section already
4978 * trying to tell us that the user wants to disconnect.
4979 */
8d61ffa5 4980 if (ifmgd->associated != req->bss)
77fdaa12 4981 return -ENOLINK;
77fdaa12 4982
bdcbd8e0 4983 sdata_info(sdata,
dfa1ad29
CO		 4984 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4985 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4986
e69e95db 4987 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4988 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4989 req->reason_code, !req->local_state_change,
4990 frame_buf);
10f644a4 4991
a90faa9d
EG		 4992 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4993 req->reason_code);
bc83b681 4994
10f644a4
JB		 4995 return 0;
4996}
026331c4 4997
afa762f6 4998void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4999{
5000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5001
49921859
BG		 5002 /*
5003 * Make sure some work items will not run after this,
5004 * they will not do anything but might not have been
5005 * cancelled when disconnecting.
5006 */
5007 cancel_work_sync(&ifmgd->monitor_work);
5008 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5009 cancel_work_sync(&ifmgd->request_smps_work);
5010 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5011 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5012 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5013
8d61ffa5 5014 sdata_lock(sdata);
959867fa
JB		 5015 if (ifmgd->assoc_data) {
5016 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5017 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5018 cfg80211_assoc_timeout(sdata->dev, bss);
5019 }
54e4ffb2
JB		 5020 if (ifmgd->auth_data)
5021 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5022 spin_lock_bh(&ifmgd->teardown_lock);
5023 if (ifmgd->teardown_skb) {
5024 kfree_skb(ifmgd->teardown_skb);
5025 ifmgd->teardown_skb = NULL;
5026 ifmgd->orig_teardown_skb = NULL;
5027 }
5028 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5029 del_timer_sync(&ifmgd->timer);
8d61ffa5 5030 sdata_unlock(sdata);
54e4ffb2
JB		 5031}
5032
a97c13c3
JO		 5033void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5034 enum nl80211_cqm_rssi_threshold_event rssi_event,
5035 gfp_t gfp)
5036{
5037 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5038
b5878a2d
JB		 5039 trace_api_cqm_rssi_notify(sdata, rssi_event);
5040
a97c13c3
JO		 5041 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5042}
5043EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5044
5045void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5046{
5047 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5048
5049 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5050
5051 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5052}
5053EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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