projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
rfkill: document rfkill module parameters
[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
4c3ebc56 1153 mutex_lock(&local->mtx);
7578d575 1154 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1155 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1156 lockdep_is_held(&local->chanctx_mtx));
1157 if (!conf) {
1158 sdata_info(sdata,
1159 "no channel context assigned to vif?, disconnecting\n");
1160 ieee80211_queue_work(&local->hw,
1161 &ifmgd->csa_connection_drop_work);
1162 mutex_unlock(&local->chanctx_mtx);
1163 mutex_unlock(&local->mtx);
1164 return;
1165 }
1166
1167 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1168
0f791eb4
LC		 1169 if (local->use_chanctx &&
1170 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1171 sdata_info(sdata,
1172 "driver doesn't support chan-switch with channel contexts\n");
1173 ieee80211_queue_work(&local->hw,
1174 &ifmgd->csa_connection_drop_work);
1175 mutex_unlock(&local->chanctx_mtx);
1176 mutex_unlock(&local->mtx);
1177 return;
55de908a
JB		 1178 }
1179
6d027bcc
LC		 1180 ch_switch.timestamp = timestamp;
1181 ch_switch.device_timestamp = device_timestamp;
1182 ch_switch.block_tx = csa_ie.mode;
1183 ch_switch.chandef = csa_ie.chandef;
1184 ch_switch.count = csa_ie.count;
1185
1186 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1187 sdata_info(sdata,
1188 "preparing for channel switch failed, disconnecting\n");
1189 ieee80211_queue_work(&local->hw,
1190 &ifmgd->csa_connection_drop_work);
1191 mutex_unlock(&local->chanctx_mtx);
1192 mutex_unlock(&local->mtx);
1193 return;
1194 }
1195
4c3ebc56
MK		 1196 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1197 chanctx->mode, false);
1198 if (res) {
55de908a 1199 sdata_info(sdata,
4c3ebc56
MK		 1200 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1201 res);
b4f286a1 1202 ieee80211_queue_work(&local->hw,
55de908a 1203 &ifmgd->csa_connection_drop_work);
b4f286a1 1204 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1205 mutex_unlock(&local->mtx);
55de908a
JB		 1206 return;
1207 }
b4f286a1 1208 mutex_unlock(&local->chanctx_mtx);
55de908a 1209
c46a73f3 1210 sdata->vif.csa_active = true;
4c3ebc56 1211 sdata->csa_chandef = csa_ie.chandef;
59af6928 1212 sdata->csa_block_tx = csa_ie.mode;
55de908a 1213
59af6928 1214 if (sdata->csa_block_tx)
a46992b4
LC		 1215 ieee80211_stop_vif_queues(local, sdata,
1216 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1217 mutex_unlock(&local->mtx);
57eebdf3 1218
2f457293
LC		 1219 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1220 csa_ie.count);
1221
b4f286a1 1222 if (local->ops->channel_switch) {
5ce6e438 1223 /* use driver's channel switch callback */
0f791eb4 1224 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1225 return;
1226 }
1227
1228 /* channel switch handled in software */
c0f17eb9 1229 if (csa_ie.count <= 1)
b4f286a1 1230 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1231 else
cc32abd4 1232 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1233 TU_TO_EXP_TIME((csa_ie.count - 1) *
1234 cbss->beacon_interval));
cc32abd4
JB		 1235}
1236
24a4e400
SG		 1237static bool
1238ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239 struct ieee80211_channel *channel,
1240 const u8 *country_ie, u8 country_ie_len,
1241 const u8 *pwr_constr_elem,
1242 int *chan_pwr, int *pwr_reduction)
cc32abd4 1243{
04b7b2ff
JB		 1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1246 int i, chan_increment;
04b7b2ff 1247 bool have_chan_pwr = false;
cc32abd4 1248
04b7b2ff
JB		 1249 /* Invalid IE */
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1251 return false;
cc32abd4 1252
04b7b2ff
JB		 1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1255
1256 switch (channel->band) {
1257 default:
1258 WARN_ON_ONCE(1);
1259 /* fall through */
1260 case IEEE80211_BAND_2GHZ:
1261 case IEEE80211_BAND_60GHZ:
1262 chan_increment = 1;
1263 break;
1264 case IEEE80211_BAND_5GHZ:
1265 chan_increment = 4;
1266 break;
cc32abd4 1267 }
04b7b2ff
JB		 1268
1269 /* find channel */
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1272
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274 goto next;
1275
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
24a4e400 1279 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1280 break;
1281 }
1282 }
1283 if (have_chan_pwr)
1284 break;
1285
1286 next:
1287 triplet++;
1288 country_ie_len -= 3;
1289 }
1290
a5fee9cb 1291 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1292 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1293 else
1294 *pwr_reduction = 0;
1295
24a4e400
SG		 1296 return have_chan_pwr;
1297}
1298
c8d65917
SG		 1299static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 const u8 *cisco_dtpc_ie,
1302 int *pwr_level)
1303{
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1309 */
1310 *pwr_level = (__s8)cisco_dtpc_ie[4];
1311}
1312
24a4e400
SG		 1313static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314 struct ieee80211_channel *channel,
1315 struct ieee80211_mgmt *mgmt,
1316 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1317 const u8 *pwr_constr_ie,
1318 const u8 *cisco_dtpc_ie)
24a4e400 1319{
c8d65917
SG		 1320 bool has_80211h_pwr = false, has_cisco_pwr = false;
1321 int chan_pwr = 0, pwr_reduction_80211h = 0;
1322 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1323 int new_ap_level;
a5fee9cb 1324 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1325
a5fee9cb
MB		 1326 if (country_ie &&
1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330 sdata, channel, country_ie, country_ie_len,
1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1332 pwr_level_80211h =
1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1334 }
1335
1336 if (cisco_dtpc_ie) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339 has_cisco_pwr = true;
24a4e400 1340 }
04b7b2ff 1341
c8d65917 1342 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1343 return 0;
04b7b2ff 1344
c8d65917
SG		 1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1347 */
1348 if (has_80211h_pwr &&
1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350 sdata_info(sdata,
1351 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1352 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1353 sdata->u.mgd.bssid);
1354 new_ap_level = pwr_level_80211h;
1355 } else { /* has_cisco_pwr is always true here. */
1356 sdata_info(sdata,
1357 "Limiting TX power to %d dBm as advertised by %pM\n",
1358 pwr_level_cisco, sdata->u.mgd.bssid);
1359 new_ap_level = pwr_level_cisco;
1360 }
04b7b2ff 1361
1ea6f9c0
JB		 1362 if (sdata->ap_power_level == new_ap_level)
1363 return 0;
04b7b2ff 1364
1ea6f9c0
JB		 1365 sdata->ap_power_level = new_ap_level;
1366 if (__ieee80211_recalc_txpower(sdata))
1367 return BSS_CHANGED_TXPOWER;
1368 return 0;
cc32abd4
JB		 1369}
1370
965bedad
JB		 1371/* powersave */
1372static void ieee80211_enable_ps(struct ieee80211_local *local,
1373 struct ieee80211_sub_if_data *sdata)
1374{
1375 struct ieee80211_conf *conf = &local->hw.conf;
1376
d5edaedc
JB		 1377 /*
1378 * If we are scanning right now then the parameters will
1379 * take effect when scan finishes.
1380 */
fbe9c429 1381 if (local->scanning)
d5edaedc
JB		 1382 return;
1383
965bedad
JB		 1384 if (conf->dynamic_ps_timeout > 0 &&
1385 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1386 mod_timer(&local->dynamic_ps_timer, jiffies +
1387 msecs_to_jiffies(conf->dynamic_ps_timeout));
1388 } else {
1389 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1390 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1391
2a13052f
JO		 1392 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1393 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1394 return;
1395
1396 conf->flags |= IEEE80211_CONF_PS;
1397 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1398 }
1399}
1400
1401static void ieee80211_change_ps(struct ieee80211_local *local)
1402{
1403 struct ieee80211_conf *conf = &local->hw.conf;
1404
1405 if (local->ps_sdata) {
965bedad
JB		 1406 ieee80211_enable_ps(local, local->ps_sdata);
1407 } else if (conf->flags & IEEE80211_CONF_PS) {
1408 conf->flags &= ~IEEE80211_CONF_PS;
1409 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410 del_timer_sync(&local->dynamic_ps_timer);
1411 cancel_work_sync(&local->dynamic_ps_enable_work);
1412 }
1413}
1414
808118cb
JY		 1415static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1416{
1417 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1418 struct sta_info *sta = NULL;
c2c98fde 1419 bool authorized = false;
808118cb
JY		 1420
1421 if (!mgd->powersave)
1422 return false;
1423
05cb9108
JB		 1424 if (mgd->broken_ap)
1425 return false;
1426
808118cb
JY		 1427 if (!mgd->associated)
1428 return false;
1429
392b9ffb 1430 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1431 return false;
1432
989c6505 1433 if (!mgd->have_beacon)
ce857888
AB		 1434 return false;
1435
808118cb
JY		 1436 rcu_read_lock();
1437 sta = sta_info_get(sdata, mgd->bssid);
1438 if (sta)
c2c98fde 1439 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1440 rcu_read_unlock();
1441
c2c98fde 1442 return authorized;
808118cb
JY		 1443}
1444
965bedad 1445/* need to hold RTNL or interface lock */
10f644a4 1446void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1447{
1448 struct ieee80211_sub_if_data *sdata, *found = NULL;
1449 int count = 0;
195e294d 1450 int timeout;
965bedad
JB		 1451
1452 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1453 local->ps_sdata = NULL;
1454 return;
1455 }
1456
1457 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1458 if (!ieee80211_sdata_running(sdata))
965bedad 1459 continue;
8c7914de
RM		 1460 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1461 /* If an AP vif is found, then disable PS
1462 * by setting the count to zero thereby setting
1463 * ps_sdata to NULL.
1464 */
1465 count = 0;
1466 break;
1467 }
965bedad
JB		 1468 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1469 continue;
1470 found = sdata;
1471 count++;
1472 }
1473
808118cb 1474 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1475 s32 beaconint_us;
1476
1477 if (latency < 0)
ed77134b 1478 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1479
1480 beaconint_us = ieee80211_tu_to_usec(
1481 found->vif.bss_conf.beacon_int);
1482
ff616381 1483 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1484 if (timeout < 0) {
1485 /*
ff616381
JO		 1486 * Go to full PSM if the user configures a very low
1487 * latency requirement.
0ab82b04
EP		 1488 * The 2000 second value is there for compatibility
1489 * until the PM_QOS_NETWORK_LATENCY is configured
1490 * with real values.
195e294d 1491 */
0ab82b04
EP		 1492 if (latency > (1900 * USEC_PER_MSEC) &&
1493 latency != (2000 * USEC_PER_SEC))
195e294d 1494 timeout = 0;
ff616381
JO		 1495 else
1496 timeout = 100;
195e294d 1497 }
09b85568 1498 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1499
04fe2037 1500 if (beaconint_us > latency) {
10f644a4 1501 local->ps_sdata = NULL;
04fe2037 1502 } else {
04fe2037 1503 int maxslp = 1;
826262c3 1504 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1505
1506 /* If the TIM IE is invalid, pretend the value is 1 */
1507 if (!dtimper)
1508 dtimper = 1;
1509 else if (dtimper > 1)
04fe2037
JB		 1510 maxslp = min_t(int, dtimper,
1511 latency / beaconint_us);
1512
9ccebe61 1513 local->hw.conf.max_sleep_period = maxslp;
56007a02 1514 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1515 local->ps_sdata = found;
04fe2037 1516 }
10f644a4 1517 } else {
965bedad 1518 local->ps_sdata = NULL;
10f644a4 1519 }
965bedad
JB		 1520
1521 ieee80211_change_ps(local);
1522}
1523
ab095877
EP		 1524void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1525{
1526 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1527
1528 if (sdata->vif.bss_conf.ps != ps_allowed) {
1529 sdata->vif.bss_conf.ps = ps_allowed;
1530 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1531 }
1532}
1533
965bedad
JB		 1534void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1535{
1536 struct ieee80211_local *local =
1537 container_of(work, struct ieee80211_local,
1538 dynamic_ps_disable_work);
1539
1540 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1541 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1542 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1543 }
1544
1545 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1546 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1547 IEEE80211_QUEUE_STOP_REASON_PS,
1548 false);
965bedad
JB		 1549}
1550
1551void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1552{
1553 struct ieee80211_local *local =
1554 container_of(work, struct ieee80211_local,
1555 dynamic_ps_enable_work);
1556 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1557 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1558 unsigned long flags;
1559 int q;
965bedad
JB		 1560
1561 /* can only happen when PS was just disabled anyway */
1562 if (!sdata)
1563 return;
1564
5e34069c
CL		 1565 ifmgd = &sdata->u.mgd;
1566
965bedad
JB		 1567 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1568 return;
1569
09b85568 1570 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1571 /* don't enter PS if TX frames are pending */
1572 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1574 msecs_to_jiffies(
1575 local->hw.conf.dynamic_ps_timeout));
1576 return;
1577 }
77b7023a
AN		 1578
1579 /*
1580 * transmission can be stopped by others which leads to
1581 * dynamic_ps_timer expiry. Postpone the ps timer if it
1582 * is not the actual idle state.
1583 */
1584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1585 for (q = 0; q < local->hw.queues; q++) {
1586 if (local->queue_stop_reasons[q]) {
1587 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1588 flags);
1589 mod_timer(&local->dynamic_ps_timer, jiffies +
1590 msecs_to_jiffies(
1591 local->hw.conf.dynamic_ps_timeout));
1592 return;
1593 }
1594 }
1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1596 }
1ddc2867 1597
375177bf 1598 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1599 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1600 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
a1598383 1604 } else {
e8306f98
VN		 1605 ieee80211_send_nullfunc(local, sdata, 1);
1606 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1607 ieee80211_flush_queues(local, sdata);
e8306f98 1608 }
f3e85b9e
VN		 1609 }
1610
2a13052f
JO		 1611 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1612 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1613 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1614 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1615 local->hw.conf.flags |= IEEE80211_CONF_PS;
1616 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1617 }
965bedad
JB		 1618}
1619
1620void ieee80211_dynamic_ps_timer(unsigned long data)
1621{
1622 struct ieee80211_local *local = (void *) data;
1623
78f1a8b7 1624 if (local->quiescing || local->suspended)
5bb644a0
JB		 1625 return;
1626
42935eca 1627 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1628}
1629
164eb02d
SW		 1630void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1631{
1632 struct delayed_work *delayed_work =
1633 container_of(work, struct delayed_work, work);
1634 struct ieee80211_sub_if_data *sdata =
1635 container_of(delayed_work, struct ieee80211_sub_if_data,
1636 dfs_cac_timer_work);
d2859df5 1637 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1638
34a3740d
JB		 1639 mutex_lock(&sdata->local->mtx);
1640 if (sdata->wdev.cac_started) {
1641 ieee80211_vif_release_channel(sdata);
1642 cfg80211_cac_event(sdata->dev, &chandef,
1643 NL80211_RADAR_CAC_FINISHED,
1644 GFP_KERNEL);
1645 }
1646 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1647}
1648
02219b3a
JB		 1649static bool
1650__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1651{
1652 struct ieee80211_local *local = sdata->local;
1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1654 bool ret;
1655 int ac;
1656
1657 if (local->hw.queues < IEEE80211_NUM_ACS)
1658 return false;
1659
1660 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1661 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1662 int non_acm_ac;
1663 unsigned long now = jiffies;
1664
1665 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1666 tx_tspec->admitted_time &&
1667 time_after(now, tx_tspec->time_slice_start + HZ)) {
1668 tx_tspec->consumed_tx_time = 0;
1669 tx_tspec->time_slice_start = now;
1670
1671 if (tx_tspec->downgraded)
1672 tx_tspec->action =
1673 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1674 }
1675
1676 switch (tx_tspec->action) {
1677 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1678 /* take the original parameters */
1679 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1680 sdata_err(sdata,
1681 "failed to set TX queue parameters for queue %d\n",
1682 ac);
1683 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1684 tx_tspec->downgraded = false;
1685 ret = true;
1686 break;
1687 case TX_TSPEC_ACTION_DOWNGRADE:
1688 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690 ret = true;
1691 break;
1692 }
1693 /* downgrade next lower non-ACM AC */
1694 for (non_acm_ac = ac + 1;
1695 non_acm_ac < IEEE80211_NUM_ACS;
1696 non_acm_ac++)
1697 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1698 break;
1699 /* The loop will result in using BK even if it requires
1700 * admission control, such configuration makes no sense
1701 * and we have to transmit somehow - the AC selection
1702 * does the same thing.
1703 */
1704 if (drv_conf_tx(local, sdata, ac,
1705 &sdata->tx_conf[non_acm_ac]))
1706 sdata_err(sdata,
1707 "failed to set TX queue parameters for queue %d\n",
1708 ac);
1709 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1710 ret = true;
1711 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1712 tx_tspec->time_slice_start + HZ - now + 1);
1713 break;
1714 case TX_TSPEC_ACTION_NONE:
1715 /* nothing now */
1716 break;
1717 }
1718 }
1719
1720 return ret;
1721}
1722
1723void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1724{
1725 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1726 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1727}
1728
1729static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1730{
1731 struct ieee80211_sub_if_data *sdata;
1732
1733 sdata = container_of(work, struct ieee80211_sub_if_data,
1734 u.mgd.tx_tspec_wk.work);
1735 ieee80211_sta_handle_tspec_ac_params(sdata);
1736}
1737
60f8b39c 1738/* MLME */
7d25745d 1739static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1740 struct ieee80211_sub_if_data *sdata,
4a3cb702 1741 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1742{
f0706e82 1743 struct ieee80211_tx_queue_params params;
4ced3f74 1744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1745 size_t left;
1746 int count;
4a3cb702
JB		 1747 const u8 *pos;
1748 u8 uapsd_queues = 0;
f0706e82 1749
e1b3ec1a 1750 if (!local->ops->conf_tx)
7d25745d 1751 return false;
e1b3ec1a 1752
32c5057b 1753 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1754 return false;
3434fbd3
JB		 1755
1756 if (!wmm_param)
7d25745d 1757 return false;
3434fbd3 1758
f0706e82 1759 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1760 return false;
ab13315a
KV		 1761
1762 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1763 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1764
f0706e82 1765 count = wmm_param[6] & 0x0f;
46900298 1766 if (count == ifmgd->wmm_last_param_set)
7d25745d 1767 return false;
46900298 1768 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1769
1770 pos = wmm_param + 8;
1771 left = wmm_param_len - 8;
1772
1773 memset(&params, 0, sizeof(params));
1774
00e96dec 1775 sdata->wmm_acm = 0;
f0706e82
JB		 1776 for (; left >= 4; left -= 4, pos += 4) {
1777 int aci = (pos[0] >> 5) & 0x03;
1778 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1779 bool uapsd = false;
f0706e82
JB		 1780 int queue;
1781
1782 switch (aci) {
0eeb59fe 1783 case 1: /* AC_BK */
e100bb64 1784 queue = 3;
988c0f72 1785 if (acm)
00e96dec 1786 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1788 uapsd = true;
f0706e82 1789 break;
0eeb59fe 1790 case 2: /* AC_VI */
e100bb64 1791 queue = 1;
988c0f72 1792 if (acm)
00e96dec 1793 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1794 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1795 uapsd = true;
f0706e82 1796 break;
0eeb59fe 1797 case 3: /* AC_VO */
e100bb64 1798 queue = 0;
988c0f72 1799 if (acm)
00e96dec 1800 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1801 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1802 uapsd = true;
f0706e82 1803 break;
0eeb59fe 1804 case 0: /* AC_BE */
f0706e82 1805 default:
e100bb64 1806 queue = 2;
988c0f72 1807 if (acm)
00e96dec 1808 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1810 uapsd = true;
f0706e82
JB		 1811 break;
1812 }
1813
1814 params.aifs = pos[0] & 0x0f;
1815 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1816 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1817 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1818 params.acm = acm;
ab13315a
KV		 1819 params.uapsd = uapsd;
1820
bdcbd8e0 1821 mlme_dbg(sdata,
02219b3a 1822 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1823 queue, aci, acm,
1824 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1825 params.txop, params.uapsd,
1826 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1827 sdata->tx_conf[queue] = params;
02219b3a
JB		 1828 if (!ifmgd->tx_tspec[queue].downgraded &&
1829 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1830 sdata_err(sdata,
1831 "failed to set TX queue parameters for queue %d\n",
1832 queue);
f0706e82 1833 }
e1b3ec1a
SG		 1834
1835 /* enable WMM or activate new settings */
4ced3f74 1836 sdata->vif.bss_conf.qos = true;
7d25745d 1837 return true;
f0706e82
JB		 1838}
1839
925e64c3
SG		 1840static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841{
1842 lockdep_assert_held(&sdata->local->mtx);
1843
392b9ffb 1844 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1845 ieee80211_run_deferred_scan(sdata->local);
1846}
1847
1848static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1849{
1850 mutex_lock(&sdata->local->mtx);
1851 __ieee80211_stop_poll(sdata);
1852 mutex_unlock(&sdata->local->mtx);
1853}
1854
7a5158ef
JB		 1855static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1856 u16 capab, bool erp_valid, u8 erp)
5628221c 1857{
bda3933a 1858 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1859 u32 changed = 0;
7a5158ef
JB		 1860 bool use_protection;
1861 bool use_short_preamble;
1862 bool use_short_slot;
1863
1864 if (erp_valid) {
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867 } else {
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870 }
1871
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1873 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1874 use_short_slot = true;
5628221c 1875
471b3efd 1876 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1879 }
7e9ed188 1880
d43c7b37 1881 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1882 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1884 }
d9430a32 1885
7a5158ef 1886 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1889 }
1890
1891 return changed;
1892}
1893
f698d856 1894static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1895 struct cfg80211_bss *cbss,
ae5eb026 1896 u32 bss_info_changed)
f0706e82 1897{
0c1ad2ca 1898 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1899 struct ieee80211_local *local = sdata->local;
68542962 1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1901
ae5eb026 1902 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1905
7ccc8bd7 1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1907 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1908
0c1ad2ca
JB		 1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1911
17e4ec14
JM		 1912 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1913
488dd7b5 1914 if (sdata->vif.p2p) {
9caf0364 1915 const struct cfg80211_bss_ies *ies;
488dd7b5 1916
9caf0364
JB		 1917 rcu_read_lock();
1918 ies = rcu_dereference(cbss->ies);
1919 if (ies) {
9caf0364
JB		 1920 int ret;
1921
1922 ret = cfg80211_get_p2p_attr(
1923 ies->data, ies->len,
1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1925 (u8 *) &bss_conf->p2p_noa_attr,
1926 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1927 if (ret >= 2) {
67baf663
JD		 1928 sdata->u.mgd.p2p_noa_index =
1929 bss_conf->p2p_noa_attr.index;
9caf0364 1930 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1931 }
488dd7b5 1932 }
9caf0364 1933 rcu_read_unlock();
488dd7b5
JB		 1934 }
1935
b291ba11 1936 /* just to be sure */
925e64c3 1937 ieee80211_stop_poll(sdata);
b291ba11 1938
9ac19a90 1939 ieee80211_led_assoc(local, 1);
9306102e 1940
989c6505 1941 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1942 /*
1943 * If the AP is buggy we may get here with no DTIM period
1944 * known, so assume it's 1 which is the only safe assumption
1945 * in that case, although if the TIM IE is broken powersave
1946 * probably just won't work at all.
1947 */
1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1949 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1951 } else {
817cee76 1952 bss_conf->beacon_rate = NULL;
e5b900d2 1953 bss_conf->dtim_period = 0;
826262c3 1954 }
e5b900d2 1955
68542962 1956 bss_conf->assoc = 1;
9cef8737 1957
a97c13c3 1958 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1960 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1961 bss_info_changed |= BSS_CHANGED_CQM;
1962
68542962 1963 /* Enable ARP filtering */
0f19b41e 1964 if (bss_conf->arp_addr_cnt)
68542962 1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1966
ae5eb026 1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1968
056508dc
JB		 1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local, -1);
1971 mutex_unlock(&local->iflist_mtx);
e0cb686f 1972
04ecd257 1973 ieee80211_recalc_smps(sdata);
ab095877
EP		 1974 ieee80211_recalc_ps_vif(sdata);
1975
9ac19a90 1976 netif_carrier_on(sdata->dev);
f0706e82
JB		 1977}
1978
e69e95db 1979static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1980 u16 stype, u16 reason, bool tx,
1981 u8 *frame_buf)
aa458d17 1982{
46900298 1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1984 struct ieee80211_local *local = sdata->local;
3cc5240b 1985 u32 changed = 0;
aa458d17 1986
8d61ffa5 1987 sdata_assert_lock(sdata);
77fdaa12 1988
37ad3888
JB		 1989 if (WARN_ON_ONCE(tx && !frame_buf))
1990 return;
1991
b291ba11
JB		 1992 if (WARN_ON(!ifmgd->associated))
1993 return;
1994
79543d8e
DS		 1995 ieee80211_stop_poll(sdata);
1996
77fdaa12 1997 ifmgd->associated = NULL;
aa458d17
TW		 1998 netif_carrier_off(sdata->dev);
1999
88bc40e8
EP		 2000 /*
2001 * if we want to get out of ps before disassoc (why?) we have
2002 * to do it before sending disassoc, as otherwise the null-packet
2003 * won't be valid.
2004 */
2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2008 }
2009 local->ps_sdata = NULL;
2010
ab095877
EP		 2011 /* disable per-vif ps */
2012 ieee80211_recalc_ps_vif(sdata);
2013
f823981e
EP		 2014 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2015 if (tx)
39ecc01d 2016 ieee80211_flush_queues(local, sdata);
f823981e 2017
37ad3888
JB		 2018 /* deauthenticate/disassociate now */
2019 if (tx || frame_buf)
88a9e31c
EP		 2020 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2021 reason, tx, frame_buf);
37ad3888
JB		 2022
2023 /* flush out frame */
2024 if (tx)
39ecc01d 2025 ieee80211_flush_queues(local, sdata);
37ad3888 2026
88a9e31c
EP		 2027 /* clear bssid only after building the needed mgmt frames */
2028 memset(ifmgd->bssid, 0, ETH_ALEN);
2029
37ad3888 2030 /* remove AP and TDLS peers */
d34ba216 2031 sta_info_flush(sdata);
37ad3888
JB		 2032
2033 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2034 changed |= ieee80211_reset_erp_info(sdata);
2035
f5e5bf25 2036 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2037 changed |= BSS_CHANGED_ASSOC;
2038 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2039
67baf663
JD		 2040 ifmgd->p2p_noa_index = -1;
2041 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2042 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2043
dd5ecfea 2044 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2045 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2046 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2047 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2048 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2049
1ea6f9c0 2050 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2051
520eb820
KV		 2052 del_timer_sync(&local->dynamic_ps_timer);
2053 cancel_work_sync(&local->dynamic_ps_enable_work);
2054
68542962 2055 /* Disable ARP filtering */
0f19b41e 2056 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2057 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2058
3abead59
JB		 2059 sdata->vif.bss_conf.qos = false;
2060 changed |= BSS_CHANGED_QOS;
2061
0aaffa9b
JB		 2062 /* The BSSID (not really interesting) and HT changed */
2063 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2064 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2065
3abead59
JB		 2066 /* disassociated - set to defaults now */
2067 ieee80211_set_wmm_default(sdata, false);
2068
b9dcf712
JB		 2069 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2070 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2071 del_timer_sync(&sdata->u.mgd.timer);
2072 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2073
826262c3 2074 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2075 sdata->vif.bss_conf.beacon_rate = NULL;
2076
989c6505 2077 ifmgd->have_beacon = false;
826262c3 2078
028e8da0 2079 ifmgd->flags = 0;
34a3740d 2080 mutex_lock(&local->mtx);
028e8da0 2081 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2082
2083 sdata->vif.csa_active = false;
0c21e632 2084 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2085 if (sdata->csa_block_tx) {
2086 ieee80211_wake_vif_queues(local, sdata,
2087 IEEE80211_QUEUE_STOP_REASON_CSA);
2088 sdata->csa_block_tx = false;
2089 }
34a3740d 2090 mutex_unlock(&local->mtx);
2475b1cc 2091
02219b3a
JB		 2092 /* existing TX TSPEC sessions no longer exist */
2093 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2094 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2095
2475b1cc 2096 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2097}
f0706e82 2098
3cf335d5
KV		 2099void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2100 struct ieee80211_hdr *hdr)
2101{
2102 /*
2103 * We can postpone the mgd.timer whenever receiving unicast frames
2104 * from AP because we know that the connection is working both ways
2105 * at that time. But multicast frames (and hence also beacons) must
2106 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2107 * data idle periods for sending the periodic probe request to the
2108 * AP we're connected to.
3cf335d5 2109 */
b291ba11
JB		 2110 if (is_multicast_ether_addr(hdr->addr1))
2111 return;
2112
be099e82 2113 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2114}
f0706e82 2115
4e5ff376
FF		 2116static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2117{
2118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2119 struct ieee80211_local *local = sdata->local;
4e5ff376 2120
133d40f9 2121 mutex_lock(&local->mtx);
392b9ffb
SG		 2122 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2123 goto out;
4e5ff376 2124
925e64c3 2125 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2126
2127 mutex_lock(&local->iflist_mtx);
2128 ieee80211_recalc_ps(local, -1);
2129 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2130
2131 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2132 goto out;
4e5ff376
FF		 2133
2134 /*
2135 * We've received a probe response, but are not sure whether
2136 * we have or will be receiving any beacons or data, so let's
2137 * schedule the timers again, just in case.
2138 */
2139 ieee80211_sta_reset_beacon_monitor(sdata);
2140
2141 mod_timer(&ifmgd->conn_mon_timer,
2142 round_jiffies_up(jiffies +
2143 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2144out:
133d40f9 2145 mutex_unlock(&local->mtx);
4e5ff376
FF		 2146}
2147
02219b3a
JB		 2148static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2149 struct ieee80211_hdr *hdr,
2150 u16 tx_time)
2151{
2152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2154 int ac = ieee80211_ac_from_tid(tid);
2155 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2156 unsigned long now = jiffies;
2157
2158 if (likely(!tx_tspec->admitted_time))
2159 return;
2160
2161 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2162 tx_tspec->consumed_tx_time = 0;
2163 tx_tspec->time_slice_start = now;
2164
2165 if (tx_tspec->downgraded) {
2166 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2167 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2168 }
2169 }
2170
2171 if (tx_tspec->downgraded)
2172 return;
2173
2174 tx_tspec->consumed_tx_time += tx_time;
2175
2176 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2177 tx_tspec->downgraded = true;
2178 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2179 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2180 }
2181}
2182
4e5ff376 2183void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2184 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2185{
02219b3a
JB		 2186 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2187
75706d0e 2188 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2189 return;
2190
4e5ff376
FF		 2191 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2192 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2193 if (ack)
cab1c7fd 2194 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2195 else
2196 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2197 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2198 return;
4e5ff376 2199 }
cab1c7fd
WD		 2200
2201 if (ack)
2202 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2203}
2204
a43abf29
ML		 2205static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2206{
2207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2208 const u8 *ssid;
f01a067d 2209 u8 *dst = ifmgd->associated->bssid;
180205bd 2210 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2211
2212 /*
2213 * Try sending broadcast probe requests for the last three
2214 * probe requests after the first ones failed since some
2215 * buggy APs only support broadcast probe requests.
2216 */
2217 if (ifmgd->probe_send_count >= unicast_limit)
2218 dst = NULL;
a43abf29 2219
4e5ff376
FF		 2220 /*
2221 * When the hardware reports an accurate Tx ACK status, it's
2222 * better to send a nullfunc frame instead of a probe request,
2223 * as it will kick us off the AP quickly if we aren't associated
2224 * anymore. The timeout will be reset if the frame is ACKed by
2225 * the AP.
2226 */
992e68bf
SD		 2227 ifmgd->probe_send_count++;
2228
04ac3c0e
FF		 2229 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2230 ifmgd->nullfunc_failed = false;
4e5ff376 2231 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2232 } else {
88c868c4
SG		 2233 int ssid_len;
2234
9caf0364 2235 rcu_read_lock();
4e5ff376 2236 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2237 if (WARN_ON_ONCE(ssid == NULL))
2238 ssid_len = 0;
2239 else
2240 ssid_len = ssid[1];
2241
a344d677
JB		 2242 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2243 ssid + 2, ssid_len, NULL,
1672c0e3 2244 0, (u32) -1, true, 0,
55de908a 2245 ifmgd->associated->channel, false);
9caf0364 2246 rcu_read_unlock();
4e5ff376 2247 }
a43abf29 2248
180205bd 2249 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2250 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2251}
2252
b291ba11
JB		 2253static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2254 bool beacon)
04de8381 2255{
04de8381 2256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2257 bool already = false;
34bfc411 2258
9607e6b6 2259 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2260 return;
2261
8d61ffa5 2262 sdata_lock(sdata);
77fdaa12
JB		 2263
2264 if (!ifmgd->associated)
2265 goto out;
2266
133d40f9
SG		 2267 mutex_lock(&sdata->local->mtx);
2268
2269 if (sdata->local->tmp_channel || sdata->local->scanning) {
2270 mutex_unlock(&sdata->local->mtx);
2271 goto out;
2272 }
2273
a13fbe54 2274 if (beacon) {
bdcbd8e0 2275 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2276 "detected beacon loss from AP (missed %d beacons) - probing\n",
2277 beacon_loss_count);
bdcbd8e0 2278
98f03342 2279 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2280 }
04de8381 2281
b291ba11
JB		 2282 /*
2283 * The driver/our work has already reported this event or the
2284 * connection monitoring has kicked in and we have already sent
2285 * a probe request. Or maybe the AP died and the driver keeps
2286 * reporting until we disassociate...
2287 *
2288 * In either case we have to ignore the current call to this
2289 * function (except for setting the correct probe reason bit)
2290 * because otherwise we would reset the timer every time and
2291 * never check whether we received a probe response!
2292 */
392b9ffb 2293 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2294 already = true;
2295
12b5f34d
EP		 2296 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2297
133d40f9
SG		 2298 mutex_unlock(&sdata->local->mtx);
2299
b291ba11
JB		 2300 if (already)
2301 goto out;
2302
4e751843
JB		 2303 mutex_lock(&sdata->local->iflist_mtx);
2304 ieee80211_recalc_ps(sdata->local, -1);
2305 mutex_unlock(&sdata->local->iflist_mtx);
2306
a43abf29
ML		 2307 ifmgd->probe_send_count = 0;
2308 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2309 out:
8d61ffa5 2310 sdata_unlock(sdata);
04de8381
KV		 2311}
2312
a619a4c0
JO		 2313struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2314 struct ieee80211_vif *vif)
2315{
2316 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2318 struct cfg80211_bss *cbss;
a619a4c0
JO		 2319 struct sk_buff *skb;
2320 const u8 *ssid;
88c868c4 2321 int ssid_len;
a619a4c0
JO		 2322
2323 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2324 return NULL;
2325
8d61ffa5 2326 sdata_assert_lock(sdata);
a619a4c0 2327
d9b3b28b
EP		 2328 if (ifmgd->associated)
2329 cbss = ifmgd->associated;
2330 else if (ifmgd->auth_data)
2331 cbss = ifmgd->auth_data->bss;
2332 else if (ifmgd->assoc_data)
2333 cbss = ifmgd->assoc_data->bss;
2334 else
a619a4c0
JO		 2335 return NULL;
2336
9caf0364 2337 rcu_read_lock();
d9b3b28b 2338 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2339 if (WARN_ON_ONCE(ssid == NULL))
2340 ssid_len = 0;
2341 else
2342 ssid_len = ssid[1];
2343
a344d677 2344 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2345 (u32) -1, cbss->channel,
6b77863b 2346 ssid + 2, ssid_len,
85a237fe 2347 NULL, 0, true);
9caf0364 2348 rcu_read_unlock();
a619a4c0
JO		 2349
2350 return skb;
2351}
2352EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2353
eef9e54c 2354static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2355{
59af6928 2356 struct ieee80211_local *local = sdata->local;
1e4dcd01 2357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2358 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2359
8d61ffa5 2360 sdata_lock(sdata);
1e4dcd01 2361 if (!ifmgd->associated) {
8d61ffa5 2362 sdata_unlock(sdata);
1e4dcd01
JO		 2363 return;
2364 }
2365
37ad3888
JB		 2366 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2367 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2368 true, frame_buf);
59af6928 2369 mutex_lock(&local->mtx);
7578d575 2370 sdata->vif.csa_active = false;
0c21e632 2371 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2372 if (sdata->csa_block_tx) {
2373 ieee80211_wake_vif_queues(local, sdata,
2374 IEEE80211_QUEUE_STOP_REASON_CSA);
2375 sdata->csa_block_tx = false;
2376 }
59af6928 2377 mutex_unlock(&local->mtx);
7da7cc1d 2378
6ff57cf8
JB		 2379 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2380 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2381 sdata_unlock(sdata);
1e4dcd01
JO		 2382}
2383
cc74c0c7 2384static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2385{
2386 struct ieee80211_sub_if_data *sdata =
2387 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2388 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2390 struct sta_info *sta;
2391
2392 if (ifmgd->associated) {
30fa9047 2393 rcu_read_lock();
a85e1d55
PS		 2394 sta = sta_info_get(sdata, ifmgd->bssid);
2395 if (sta)
2396 sta->beacon_loss_count++;
30fa9047 2397 rcu_read_unlock();
a85e1d55 2398 }
b291ba11 2399
682bd38b 2400 if (ifmgd->connection_loss) {
882a7c69
JB		 2401 sdata_info(sdata, "Connection to AP %pM lost\n",
2402 ifmgd->bssid);
eef9e54c 2403 __ieee80211_disconnect(sdata);
882a7c69 2404 } else {
1e4dcd01 2405 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2406 }
2407}
2408
2409static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2410{
2411 struct ieee80211_sub_if_data *sdata =
2412 container_of(work, struct ieee80211_sub_if_data,
2413 u.mgd.csa_connection_drop_work);
2414
eef9e54c 2415 __ieee80211_disconnect(sdata);
b291ba11
JB		 2416}
2417
04de8381
KV		 2418void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2419{
2420 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2421 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2422
b5878a2d
JB		 2423 trace_api_beacon_loss(sdata);
2424
682bd38b 2425 sdata->u.mgd.connection_loss = false;
1e4dcd01 2426 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2427}
2428EXPORT_SYMBOL(ieee80211_beacon_loss);
2429
1e4dcd01
JO		 2430void ieee80211_connection_loss(struct ieee80211_vif *vif)
2431{
2432 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2433 struct ieee80211_hw *hw = &sdata->local->hw;
2434
b5878a2d
JB		 2435 trace_api_connection_loss(sdata);
2436
682bd38b 2437 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2438 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2439}
2440EXPORT_SYMBOL(ieee80211_connection_loss);
2441
2442
66e67e41
JB		 2443static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2444 bool assoc)
2445{
2446 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2447
8d61ffa5 2448 sdata_assert_lock(sdata);
66e67e41 2449
66e67e41
JB		 2450 if (!assoc) {
2451 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2452
2453 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2454 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2455 sdata->u.mgd.flags = 0;
34a3740d 2456 mutex_lock(&sdata->local->mtx);
55de908a 2457 ieee80211_vif_release_channel(sdata);
34a3740d 2458 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2459 }
2460
5b112d3d 2461 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2462 kfree(auth_data);
2463 sdata->u.mgd.auth_data = NULL;
2464}
2465
2466static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2467 struct ieee80211_mgmt *mgmt, size_t len)
2468{
1672c0e3 2469 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2470 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2471 u8 *pos;
2472 struct ieee802_11_elems elems;
1672c0e3 2473 u32 tx_flags = 0;
66e67e41
JB		 2474
2475 pos = mgmt->u.auth.variable;
b2e506bf 2476 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2477 if (!elems.challenge)
2478 return;
2479 auth_data->expected_transaction = 4;
a1845fc7 2480 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2481 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2482 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2483 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2484 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2485 elems.challenge - 2, elems.challenge_len + 2,
2486 auth_data->bss->bssid, auth_data->bss->bssid,
2487 auth_data->key, auth_data->key_len,
1672c0e3 2488 auth_data->key_idx, tx_flags);
66e67e41
JB		 2489}
2490
8d61ffa5
JB		 2491static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2492 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2493{
2494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2495 u8 bssid[ETH_ALEN];
2496 u16 auth_alg, auth_transaction, status_code;
2497 struct sta_info *sta;
2498
8d61ffa5 2499 sdata_assert_lock(sdata);
66e67e41
JB		 2500
2501 if (len < 24 + 6)
8d61ffa5 2502 return;
66e67e41
JB		 2503
2504 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2505 return;
66e67e41
JB		 2506
2507 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2508
b203ca39 2509 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2510 return;
66e67e41
JB		 2511
2512 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2513 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2514 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2515
2516 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2517 auth_transaction != ifmgd->auth_data->expected_transaction) {
2518 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2519 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2520 auth_transaction,
2521 ifmgd->auth_data->expected_transaction);
8d61ffa5 2522 return;
0f4126e8 2523 }
66e67e41
JB		 2524
2525 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2526 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2527 mgmt->sa, status_code);
dac211ec 2528 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2529 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2530 return;
66e67e41
JB		 2531 }
2532
2533 switch (ifmgd->auth_data->algorithm) {
2534 case WLAN_AUTH_OPEN:
2535 case WLAN_AUTH_LEAP:
2536 case WLAN_AUTH_FT:
6b8ece3a 2537 case WLAN_AUTH_SAE:
66e67e41
JB		 2538 break;
2539 case WLAN_AUTH_SHARED_KEY:
2540 if (ifmgd->auth_data->expected_transaction != 4) {
2541 ieee80211_auth_challenge(sdata, mgmt, len);
2542 /* need another frame */
8d61ffa5 2543 return;
66e67e41
JB		 2544 }
2545 break;
2546 default:
2547 WARN_ONCE(1, "invalid auth alg %d",
2548 ifmgd->auth_data->algorithm);
8d61ffa5 2549 return;
66e67e41
JB		 2550 }
2551
bdcbd8e0 2552 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2553 ifmgd->auth_data->done = true;
2554 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2555 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2556 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2557
6b8ece3a
JM		 2558 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2559 ifmgd->auth_data->expected_transaction != 2) {
2560 /*
2561 * Report auth frame to user space for processing since another
2562 * round of Authentication frames is still needed.
2563 */
6ff57cf8 2564 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2565 return;
6b8ece3a
JM		 2566 }
2567
66e67e41
JB		 2568 /* move station state to auth */
2569 mutex_lock(&sdata->local->sta_mtx);
2570 sta = sta_info_get(sdata, bssid);
2571 if (!sta) {
2572 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2573 goto out_err;
2574 }
2575 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2576 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2577 goto out_err;
2578 }
2579 mutex_unlock(&sdata->local->sta_mtx);
2580
6ff57cf8 2581 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2582 return;
66e67e41
JB		 2583 out_err:
2584 mutex_unlock(&sdata->local->sta_mtx);
2585 /* ignore frame -- wait for timeout */
66e67e41
JB		 2586}
2587
dfa1ad29
CO		 2588#define case_WLAN(type) \
2589 case WLAN_REASON_##type: return #type
2590
2591static const char *ieee80211_get_reason_code_string(u16 reason_code)
2592{
2593 switch (reason_code) {
2594 case_WLAN(UNSPECIFIED);
2595 case_WLAN(PREV_AUTH_NOT_VALID);
2596 case_WLAN(DEAUTH_LEAVING);
2597 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2598 case_WLAN(DISASSOC_AP_BUSY);
2599 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2600 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2601 case_WLAN(DISASSOC_STA_HAS_LEFT);
2602 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2603 case_WLAN(DISASSOC_BAD_POWER);
2604 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2605 case_WLAN(INVALID_IE);
2606 case_WLAN(MIC_FAILURE);
2607 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2608 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2609 case_WLAN(IE_DIFFERENT);
2610 case_WLAN(INVALID_GROUP_CIPHER);
2611 case_WLAN(INVALID_PAIRWISE_CIPHER);
2612 case_WLAN(INVALID_AKMP);
2613 case_WLAN(UNSUPP_RSN_VERSION);
2614 case_WLAN(INVALID_RSN_IE_CAP);
2615 case_WLAN(IEEE8021X_FAILED);
2616 case_WLAN(CIPHER_SUITE_REJECTED);
2617 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2618 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2619 case_WLAN(DISASSOC_LOW_ACK);
2620 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2621 case_WLAN(QSTA_LEAVE_QBSS);
2622 case_WLAN(QSTA_NOT_USE);
2623 case_WLAN(QSTA_REQUIRE_SETUP);
2624 case_WLAN(QSTA_TIMEOUT);
2625 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2626 case_WLAN(MESH_PEER_CANCELED);
2627 case_WLAN(MESH_MAX_PEERS);
2628 case_WLAN(MESH_CONFIG);
2629 case_WLAN(MESH_CLOSE);
2630 case_WLAN(MESH_MAX_RETRIES);
2631 case_WLAN(MESH_CONFIRM_TIMEOUT);
2632 case_WLAN(MESH_INVALID_GTK);
2633 case_WLAN(MESH_INCONSISTENT_PARAM);
2634 case_WLAN(MESH_INVALID_SECURITY);
2635 case_WLAN(MESH_PATH_ERROR);
2636 case_WLAN(MESH_PATH_NOFORWARD);
2637 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2638 case_WLAN(MAC_EXISTS_IN_MBSS);
2639 case_WLAN(MESH_CHAN_REGULATORY);
2640 case_WLAN(MESH_CHAN);
2641 default: return "<unknown>";
2642 }
2643}
66e67e41 2644
8d61ffa5
JB		 2645static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2646 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2647{
46900298 2648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2649 const u8 *bssid = NULL;
f0706e82
JB		 2650 u16 reason_code;
2651
8d61ffa5 2652 sdata_assert_lock(sdata);
66e67e41 2653
f4ea83dd 2654 if (len < 24 + 2)
8d61ffa5 2655 return;
f0706e82 2656
66e67e41 2657 if (!ifmgd->associated ||
b203ca39 2658 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2659 return;
77fdaa12 2660
0c1ad2ca 2661 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2662
2663 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2664
dfa1ad29
CO		 2665 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2666 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2667
37ad3888
JB		 2668 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2669
6ff57cf8 2670 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2671}
2672
2673
8d61ffa5
JB		 2674static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2675 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2676{
46900298 2677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2678 u16 reason_code;
2679
8d61ffa5 2680 sdata_assert_lock(sdata);
77fdaa12 2681
66e67e41 2682 if (len < 24 + 2)
8d61ffa5 2683 return;
77fdaa12 2684
66e67e41 2685 if (!ifmgd->associated ||
b203ca39 2686 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2687 return;
f0706e82
JB		 2688
2689 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2690
bdcbd8e0
JB		 2691 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2692 mgmt->sa, reason_code);
f0706e82 2693
37ad3888
JB		 2694 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2695
6ff57cf8 2696 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2697}
2698
c74d084f
CL		 2699static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2700 u8 *supp_rates, unsigned int supp_rates_len,
2701 u32 *rates, u32 *basic_rates,
2702 bool *have_higher_than_11mbit,
2103dec1
SW		 2703 int *min_rate, int *min_rate_index,
2704 int shift, u32 rate_flags)
c74d084f
CL		 2705{
2706 int i, j;
2707
2708 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2709 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2710 bool is_basic = !!(supp_rates[i] & 0x80);
2711
2103dec1 2712 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2713 *have_higher_than_11mbit = true;
2714
2715 /*
2716 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2717 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2718 *
2719 * Note: Even through the membership selector and the basic
2720 * rate flag share the same bit, they are not exactly
2721 * the same.
2722 */
2723 if (!!(supp_rates[i] & 0x80) &&
2724 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2725 continue;
2726
2727 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2728 struct ieee80211_rate *br;
2729 int brate;
2730
2731 br = &sband->bitrates[j];
2732 if ((rate_flags & br->flags) != rate_flags)
2733 continue;
2734
2735 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2736 if (brate == rate) {
c74d084f
CL		 2737 *rates |= BIT(j);
2738 if (is_basic)
2739 *basic_rates |= BIT(j);
2103dec1
SW		 2740 if ((rate * 5) < *min_rate) {
2741 *min_rate = rate * 5;
c74d084f
CL		 2742 *min_rate_index = j;
2743 }
2744 break;
2745 }
2746 }
2747 }
2748}
f0706e82 2749
66e67e41
JB		 2750static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2751 bool assoc)
2752{
2753 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2754
8d61ffa5 2755 sdata_assert_lock(sdata);
66e67e41 2756
66e67e41
JB		 2757 if (!assoc) {
2758 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2759
2760 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2761 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2762 sdata->u.mgd.flags = 0;
34a3740d 2763 mutex_lock(&sdata->local->mtx);
55de908a 2764 ieee80211_vif_release_channel(sdata);
34a3740d 2765 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2766 }
2767
2768 kfree(assoc_data);
2769 sdata->u.mgd.assoc_data = NULL;
2770}
2771
2772static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2773 struct cfg80211_bss *cbss,
af6b6374 2774 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2775{
46900298 2776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2777 struct ieee80211_local *local = sdata->local;
8318d78a 2778 struct ieee80211_supported_band *sband;
f0706e82 2779 struct sta_info *sta;
af6b6374 2780 u8 *pos;
af6b6374 2781 u16 capab_info, aid;
f0706e82 2782 struct ieee802_11_elems elems;
bda3933a 2783 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2784 const struct cfg80211_bss_ies *bss_ies = NULL;
2785 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2786 u32 changed = 0;
c74d084f 2787 int err;
35d865af 2788 bool ret;
f0706e82 2789
af6b6374 2790 /* AssocResp and ReassocResp have identical structure */
f0706e82 2791
f0706e82 2792 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2793 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2794
1dd84aa2 2795 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2796 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2797 aid);
1dd84aa2
JB		 2798 aid &= ~(BIT(15) | BIT(14));
2799
05cb9108
JB		 2800 ifmgd->broken_ap = false;
2801
2802 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2803 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2804 aid);
05cb9108
JB		 2805 aid = 0;
2806 ifmgd->broken_ap = true;
2807 }
2808
af6b6374 2809 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2810 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2811
f0706e82 2812 if (!elems.supp_rates) {
bdcbd8e0 2813 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2814 return false;
f0706e82
JB		 2815 }
2816
46900298 2817 ifmgd->aid = aid;
9041c1fa
AN		 2818 ifmgd->tdls_chan_switch_prohibited =
2819 elems.ext_capab && elems.ext_capab_len >= 5 &&
2820 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2821
35d865af
JB		 2822 /*
2823 * Some APs are erroneously not including some information in their
2824 * (re)association response frames. Try to recover by using the data
2825 * from the beacon or probe response. This seems to afflict mobile
2826 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2827 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2828 */
2829 if ((assoc_data->wmm && !elems.wmm_param) ||
2830 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2831 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2832 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2833 (!elems.vht_cap_elem || !elems.vht_operation))) {
2834 const struct cfg80211_bss_ies *ies;
2835 struct ieee802_11_elems bss_elems;
2836
2837 rcu_read_lock();
2838 ies = rcu_dereference(cbss->ies);
2839 if (ies)
2840 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2841 GFP_ATOMIC);
2842 rcu_read_unlock();
2843 if (!bss_ies)
2844 return false;
2845
2846 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2847 false, &bss_elems);
2848 if (assoc_data->wmm &&
2849 !elems.wmm_param && bss_elems.wmm_param) {
2850 elems.wmm_param = bss_elems.wmm_param;
2851 sdata_info(sdata,
2852 "AP bug: WMM param missing from AssocResp\n");
2853 }
2854
2855 /*
2856 * Also check if we requested HT/VHT, otherwise the AP doesn't
2857 * have to include the IEs in the (re)association response.
2858 */
2859 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2860 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2861 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2862 sdata_info(sdata,
2863 "AP bug: HT capability missing from AssocResp\n");
2864 }
2865 if (!elems.ht_operation && bss_elems.ht_operation &&
2866 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2867 elems.ht_operation = bss_elems.ht_operation;
2868 sdata_info(sdata,
2869 "AP bug: HT operation missing from AssocResp\n");
2870 }
2871 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2872 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2873 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2874 sdata_info(sdata,
2875 "AP bug: VHT capa missing from AssocResp\n");
2876 }
2877 if (!elems.vht_operation && bss_elems.vht_operation &&
2878 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2879 elems.vht_operation = bss_elems.vht_operation;
2880 sdata_info(sdata,
2881 "AP bug: VHT operation missing from AssocResp\n");
2882 }
2883 }
2884
30eb1dc2
JB		 2885 /*
2886 * We previously checked these in the beacon/probe response, so
2887 * they should be present here. This is just a safety net.
2888 */
2889 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2890 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2891 sdata_info(sdata,
35d865af
JB		 2892 "HT AP is missing WMM params or HT capability/operation\n");
2893 ret = false;
2894 goto out;
30eb1dc2
JB		 2895 }
2896
2897 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2898 (!elems.vht_cap_elem || !elems.vht_operation)) {
2899 sdata_info(sdata,
35d865af
JB		 2900 "VHT AP is missing VHT capability/operation\n");
2901 ret = false;
2902 goto out;
30eb1dc2
JB		 2903 }
2904
2a33bee2
GE		 2905 mutex_lock(&sdata->local->sta_mtx);
2906 /*
2907 * station info was already allocated and inserted before
2908 * the association and should be available to us
2909 */
7852e361 2910 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2911 if (WARN_ON(!sta)) {
2912 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2913 ret = false;
2914 goto out;
77fdaa12 2915 }
05e5e883 2916
55de908a 2917 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2918
30eb1dc2 2919 /* Set up internal HT/VHT capabilities */
a8243b72 2920 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2921 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2922 elems.ht_cap_elem, sta);
64f68e5d 2923
818255ea
MP		 2924 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2925 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2926 elems.vht_cap_elem, sta);
818255ea 2927
30eb1dc2
JB		 2928 /*
2929 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2930 * in their association response, so ignore that data for our own
2931 * configuration. If it changed since the last beacon, we'll get the
2932 * next beacon and update then.
2933 */
1128958d 2934
bee7f586
JB		 2935 /*
2936 * If an operating mode notification IE is present, override the
2937 * NSS calculation (that would be done in rate_control_rate_init())
2938 * and use the # of streams from that element.
2939 */
2940 if (elems.opmode_notif &&
2941 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2942 u8 nss;
2943
2944 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2945 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2946 nss += 1;
2947 sta->sta.rx_nss = nss;
2948 }
2949
4b7679a5 2950 rate_control_rate_init(sta);
f0706e82 2951
46900298 2952 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2953 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2954
a74a8c84 2955 sta->sta.wme = elems.wmm_param;
ddf4ac53 2956
3e4d40fa 2957 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2958 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2959 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2960 if (err) {
bdcbd8e0
JB		 2961 sdata_info(sdata,
2962 "failed to move station %pM to desired state\n",
2963 sta->sta.addr);
c8987876
JB		 2964 WARN_ON(__sta_info_destroy(sta));
2965 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2966 ret = false;
2967 goto out;
c8987876
JB		 2968 }
2969
7852e361 2970 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2971
f2176d72
JO		 2972 /*
2973 * Always handle WMM once after association regardless
2974 * of the first value the AP uses. Setting -1 here has
2975 * that effect because the AP values is an unsigned
2976 * 4-bit value.
2977 */
2978 ifmgd->wmm_last_param_set = -1;
2979
095d81ce 2980 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2981 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2982 elems.wmm_param_len);
aa837e1d 2983 else
3abead59
JB		 2984 ieee80211_set_wmm_default(sdata, false);
2985 changed |= BSS_CHANGED_QOS;
f0706e82 2986
60f8b39c
JB		 2987 /* set AID and assoc capability,
2988 * ieee80211_set_associated() will tell the driver */
2989 bss_conf->aid = aid;
2990 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2991 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2992
d524215f
FF		 2993 /*
2994 * If we're using 4-addr mode, let the AP know that we're
2995 * doing so, so that it can create the STA VLAN on its side
2996 */
2997 if (ifmgd->use_4addr)
2998 ieee80211_send_4addr_nullfunc(local, sdata);
2999
15b7b062 3000 /*
b291ba11
JB		 3001 * Start timer to probe the connection to the AP now.
3002 * Also start the timer that will detect beacon loss.
15b7b062 3003 */
b291ba11 3004 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3005 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3006
35d865af
JB		 3007 ret = true;
3008 out:
3009 kfree(bss_ies);
3010 return ret;
f0706e82
JB		 3011}
3012
8d61ffa5
JB		 3013static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3014 struct ieee80211_mgmt *mgmt,
3015 size_t len)
66e67e41
JB		 3016{
3017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3018 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3019 u16 capab_info, status_code, aid;
3020 struct ieee802_11_elems elems;
b0b6aa2c 3021 int ac, uapsd_queues = -1;
66e67e41
JB		 3022 u8 *pos;
3023 bool reassoc;
8d61ffa5 3024 struct cfg80211_bss *bss;
66e67e41 3025
8d61ffa5 3026 sdata_assert_lock(sdata);
66e67e41
JB		 3027
3028 if (!assoc_data)
8d61ffa5 3029 return;
b203ca39 3030 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3031 return;
66e67e41
JB		 3032
3033 /*
3034 * AssocResp and ReassocResp have identical structure, so process both
3035 * of them in this function.
3036 */
3037
3038 if (len < 24 + 6)
8d61ffa5 3039 return;
66e67e41
JB		 3040
3041 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3042 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3043 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3044 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3045
bdcbd8e0
JB		 3046 sdata_info(sdata,
3047 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3048 reassoc ? "Rea" : "A", mgmt->sa,
3049 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3050
3051 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3052 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3053
3054 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3055 elems.timeout_int &&
3056 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3057 u32 tu, ms;
79ba1d89 3058 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3059 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3060 sdata_info(sdata,
3061 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3062 mgmt->sa, tu, ms);
66e67e41 3063 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3064 assoc_data->timeout_started = true;
66e67e41 3065 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3066 run_again(sdata, assoc_data->timeout);
3067 return;
66e67e41
JB		 3068 }
3069
8d61ffa5 3070 bss = assoc_data->bss;
66e67e41
JB		 3071
3072 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3073 sdata_info(sdata, "%pM denied association (code=%d)\n",
3074 mgmt->sa, status_code);
66e67e41
JB		 3075 ieee80211_destroy_assoc_data(sdata, false);
3076 } else {
8d61ffa5 3077 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3078 /* oops -- internal error -- send timeout for now */
10a9109f 3079 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3080 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3081 return;
66e67e41 3082 }
635d999f 3083 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3084
3085 /*
3086 * destroy assoc_data afterwards, as otherwise an idle
3087 * recalc after assoc_data is NULL but before associated
3088 * is set can cause the interface to go idle
3089 */
3090 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3091
3092 /* get uapsd queues configuration */
3093 uapsd_queues = 0;
3094 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3095 if (sdata->tx_conf[ac].uapsd)
3096 uapsd_queues |= BIT(ac);
66e67e41
JB		 3097 }
3098
b0b6aa2c 3099 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3100}
8e3c1b77 3101
98c8fccf 3102static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3103 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3104 struct ieee80211_rx_status *rx_status,
d45c4172 3105 struct ieee802_11_elems *elems)
98c8fccf
JB		 3106{
3107 struct ieee80211_local *local = sdata->local;
c2b13452 3108 struct ieee80211_bss *bss;
98c8fccf 3109 struct ieee80211_channel *channel;
56007a02 3110
8d61ffa5 3111 sdata_assert_lock(sdata);
b4f286a1 3112
3afc2167
EG		 3113 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3114 if (!channel)
98c8fccf
JB		 3115 return;
3116
98c8fccf 3117 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3118 channel);
817cee76 3119 if (bss) {
817cee76 3120 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3121 ieee80211_rx_bss_put(local, bss);
817cee76 3122 }
f0706e82
JB		 3123}
3124
3125
f698d856 3126static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3127 struct sk_buff *skb)
f0706e82 3128{
af6b6374 3129 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3130 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3131 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3132 size_t baselen, len = skb->len;
ae6a44e3
EK		 3133 struct ieee802_11_elems elems;
3134
15b7b062
KV		 3135 ifmgd = &sdata->u.mgd;
3136
8d61ffa5 3137 sdata_assert_lock(sdata);
77fdaa12 3138
b203ca39 3139 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3140 return; /* ignore ProbeResp to foreign address */
3141
ae6a44e3
EK		 3142 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3143 if (baselen > len)
3144 return;
3145
3146 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3147 false, &elems);
ae6a44e3 3148
d45c4172 3149 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3150
77fdaa12 3151 if (ifmgd->associated &&
b203ca39 3152 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3153 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3154
3155 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3156 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3157 /* got probe response, continue with auth */
bdcbd8e0 3158 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3159 ifmgd->auth_data->tries = 0;
3160 ifmgd->auth_data->timeout = jiffies;
89afe614 3161 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3162 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3163 }
f0706e82
JB		 3164}
3165
d91f36db
JB		 3166/*
3167 * This is the canonical list of information elements we care about,
3168 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3169 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3170 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3171 * changes to requested client power.
d91f36db
JB		 3172 *
3173 * We implement beacon filtering in software since that means we can
3174 * avoid processing the frame here and in cfg80211, and userspace
3175 * will not be able to tell whether the hardware supports it or not.
3176 *
3177 * XXX: This list needs to be dynamic -- userspace needs to be able to
3178 * add items it requires. It also needs to be able to tell us to
3179 * look out for other vendor IEs.
3180 */
3181static const u64 care_about_ies =
1d4df3a5
JB		 3182 (1ULL << WLAN_EID_COUNTRY) |
3183 (1ULL << WLAN_EID_ERP_INFO) |
3184 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3185 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3186 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 3187 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 3188
8d61ffa5
JB		 3189static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3190 struct ieee80211_mgmt *mgmt, size_t len,
3191 struct ieee80211_rx_status *rx_status)
f0706e82 3192{
d91f36db 3193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3194 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3195 size_t baselen;
3196 struct ieee802_11_elems elems;
f698d856 3197 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3198 struct ieee80211_chanctx_conf *chanctx_conf;
3199 struct ieee80211_channel *chan;
bee7f586 3200 struct sta_info *sta;
471b3efd 3201 u32 changed = 0;
f87ad637 3202 bool erp_valid;
7a5158ef 3203 u8 erp_value = 0;
d91f36db 3204 u32 ncrc;
77fdaa12 3205 u8 *bssid;
8d61ffa5 3206 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3207
8d61ffa5 3208 sdata_assert_lock(sdata);
f0706e82 3209
ae6a44e3
EK		 3210 /* Process beacon from the current BSS */
3211 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3212 if (baselen > len)
8d61ffa5 3213 return;
ae6a44e3 3214
55de908a
JB		 3215 rcu_read_lock();
3216 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3217 if (!chanctx_conf) {
3218 rcu_read_unlock();
8d61ffa5 3219 return;
55de908a
JB		 3220 }
3221
4bf88530 3222 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3223 rcu_read_unlock();
8d61ffa5 3224 return;
55de908a 3225 }
4bf88530 3226 chan = chanctx_conf->def.chan;
55de908a 3227 rcu_read_unlock();
f0706e82 3228
c65dd147 3229 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3230 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3231 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3232 len - baselen, false, &elems);
77fdaa12 3233
d45c4172 3234 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3235 if (elems.tim && !elems.parse_error) {
3236 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3237 ifmgd->dtim_period = tim_ie->dtim_period;
3238 }
989c6505 3239 ifmgd->have_beacon = true;
c65dd147 3240 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3241 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3242 sdata->vif.bss_conf.sync_tsf =
3243 le64_to_cpu(mgmt->u.beacon.timestamp);
3244 sdata->vif.bss_conf.sync_device_ts =
3245 rx_status->device_timestamp;
3246 if (elems.tim)
3247 sdata->vif.bss_conf.sync_dtim_count =
3248 elems.tim->dtim_count;
3249 else
3250 sdata->vif.bss_conf.sync_dtim_count = 0;
3251 }
66e67e41
JB		 3252 /* continue assoc process */
3253 ifmgd->assoc_data->timeout = jiffies;
89afe614 3254 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3255 run_again(sdata, ifmgd->assoc_data->timeout);
3256 return;
66e67e41 3257 }
77fdaa12 3258
66e67e41 3259 if (!ifmgd->associated ||
b203ca39 3260 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3261 return;
66e67e41 3262 bssid = ifmgd->associated->bssid;
f0706e82 3263
17e4ec14
JM		 3264 /* Track average RSSI from the Beacon frames of the current AP */
3265 ifmgd->last_beacon_signal = rx_status->signal;
3266 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3267 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3268 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3269 ifmgd->last_cqm_event_signal = 0;
391a200a 3270 ifmgd->count_beacon_signal = 1;
615f7b9b 3271 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3272 } else {
3273 ifmgd->ave_beacon_signal =
3274 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3275 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3276 ifmgd->ave_beacon_signal) / 16;
391a200a 3277 ifmgd->count_beacon_signal++;
17e4ec14 3278 }
615f7b9b
MV		 3279
3280 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3281 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3282 int sig = ifmgd->ave_beacon_signal;
3283 int last_sig = ifmgd->last_ave_beacon_signal;
3284
3285 /*
3286 * if signal crosses either of the boundaries, invoke callback
3287 * with appropriate parameters
3288 */
3289 if (sig > ifmgd->rssi_max_thold &&
3290 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3291 ifmgd->last_ave_beacon_signal = sig;
887da917 3292 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3293 } else if (sig < ifmgd->rssi_min_thold &&
3294 (last_sig >= ifmgd->rssi_max_thold ||
3295 last_sig == 0)) {
3296 ifmgd->last_ave_beacon_signal = sig;
887da917 3297 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3298 }
3299 }
3300
17e4ec14 3301 if (bss_conf->cqm_rssi_thold &&
391a200a 3302 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3303 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3304 int sig = ifmgd->ave_beacon_signal / 16;
3305 int last_event = ifmgd->last_cqm_event_signal;
3306 int thold = bss_conf->cqm_rssi_thold;
3307 int hyst = bss_conf->cqm_rssi_hyst;
3308 if (sig < thold &&
3309 (last_event == 0 || sig < last_event - hyst)) {
3310 ifmgd->last_cqm_event_signal = sig;
3311 ieee80211_cqm_rssi_notify(
3312 &sdata->vif,
3313 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3314 GFP_KERNEL);
3315 } else if (sig > thold &&
3316 (last_event == 0 || sig > last_event + hyst)) {
3317 ifmgd->last_cqm_event_signal = sig;
3318 ieee80211_cqm_rssi_notify(
3319 &sdata->vif,
3320 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3321 GFP_KERNEL);
3322 }
3323 }
3324
392b9ffb 3325 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3326 mlme_dbg_ratelimited(sdata,
112c31f0 3327 "cancelling AP probe due to a received beacon\n");
392b9ffb 3328 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3329 }
3330
b291ba11
JB		 3331 /*
3332 * Push the beacon loss detection into the future since
3333 * we are processing a beacon from the AP just now.
3334 */
d3a910a8 3335 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3336
d91f36db
JB		 3337 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3338 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3339 len - baselen, false, &elems,
d91f36db
JB		 3340 care_about_ies, ncrc);
3341
25c9c875 3342 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3343 bool directed_tim = ieee80211_check_tim(elems.tim,
3344 elems.tim_len,
3345 ifmgd->aid);
1fb3606b 3346 if (directed_tim) {
572e0012 3347 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3348 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3349 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3350 ieee80211_hw_config(local,
3351 IEEE80211_CONF_CHANGE_PS);
3352 }
572e0012 3353 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3354 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3355 local->pspolling = true;
3356
3357 /*
3358 * Here is assumed that the driver will be
3359 * able to send ps-poll frame and receive a
3360 * response even though power save mode is
3361 * enabled, but some drivers might require
3362 * to disable power save here. This needs
3363 * to be investigated.
3364 */
3365 ieee80211_send_pspoll(local, sdata);
3366 }
a97b77b9
VN		 3367 }
3368 }
7a5158ef 3369
488dd7b5 3370 if (sdata->vif.p2p) {
67baf663 3371 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3372 int ret;
3373
3374 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3375 len - baselen,
3376 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3377 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3378 if (ret >= 2) {
3379 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3380 /* valid noa_attr and index changed */
3381 sdata->u.mgd.p2p_noa_index = noa.index;
3382 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3383 changed |= BSS_CHANGED_P2P_PS;
3384 /*
3385 * make sure we update all information, the CRC
3386 * mechanism doesn't look at P2P attributes.
3387 */
3388 ifmgd->beacon_crc_valid = false;
3389 }
3390 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3391 /* noa_attr not found and we had valid noa_attr before */
3392 sdata->u.mgd.p2p_noa_index = -1;
3393 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3394 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3395 ifmgd->beacon_crc_valid = false;
3396 }
3397 }
3398
0c21e632
LC		 3399 if (ifmgd->csa_waiting_bcn)
3400 ieee80211_chswitch_post_beacon(sdata);
3401
d8ec4433 3402 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3403 return;
30196673 3404 ifmgd->beacon_crc = ncrc;
d8ec4433 3405 ifmgd->beacon_crc_valid = true;
30196673 3406
d45c4172 3407 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3408
d70b7616 3409 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3410 rx_status->device_timestamp,
d70b7616
JB		 3411 &elems, true);
3412
095d81ce
JB		 3413 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3414 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3415 elems.wmm_param_len))
3416 changed |= BSS_CHANGED_QOS;
3417
c65dd147
EG		 3418 /*
3419 * If we haven't had a beacon before, tell the driver about the
ef429dad 3420 * DTIM period (and beacon timing if desired) now.
c65dd147 3421 */
989c6505 3422 if (!ifmgd->have_beacon) {
c65dd147
EG		 3423 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3424 if (elems.tim)
3425 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3426 else
3427 bss_conf->dtim_period = 1;
ef429dad
JB		 3428
3429 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3430 sdata->vif.bss_conf.sync_tsf =
3431 le64_to_cpu(mgmt->u.beacon.timestamp);
3432 sdata->vif.bss_conf.sync_device_ts =
3433 rx_status->device_timestamp;
3434 if (elems.tim)
3435 sdata->vif.bss_conf.sync_dtim_count =
3436 elems.tim->dtim_count;
3437 else
3438 sdata->vif.bss_conf.sync_dtim_count = 0;
3439 }
3440
989c6505
AB		 3441 changed |= BSS_CHANGED_BEACON_INFO;
3442 ifmgd->have_beacon = true;
482a9c74
AB		 3443
3444 mutex_lock(&local->iflist_mtx);
3445 ieee80211_recalc_ps(local, -1);
3446 mutex_unlock(&local->iflist_mtx);
3447
ce857888 3448 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3449 }
3450
1946bed9 3451 if (elems.erp_info) {
7a5158ef
JB		 3452 erp_valid = true;
3453 erp_value = elems.erp_info[0];
3454 } else {
3455 erp_valid = false;
50c4afb9 3456 }
7a5158ef
JB		 3457 changed |= ieee80211_handle_bss_capability(sdata,
3458 le16_to_cpu(mgmt->u.beacon.capab_info),
3459 erp_valid, erp_value);
f0706e82 3460
1128958d 3461 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3462 sta = sta_info_get(sdata, bssid);
3463
53b954ee
EP		 3464 if (ieee80211_config_bw(sdata, sta,
3465 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3466 elems.vht_operation, bssid, &changed)) {
3467 mutex_unlock(&local->sta_mtx);
3468 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3469 WLAN_REASON_DEAUTH_LEAVING,
3470 true, deauth_buf);
6ff57cf8
JB		 3471 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3472 sizeof(deauth_buf));
8d61ffa5 3473 return;
30eb1dc2 3474 }
bee7f586
JB		 3475
3476 if (sta && elems.opmode_notif)
3477 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3478 rx_status->band, true);
1128958d 3479 mutex_unlock(&local->sta_mtx);
d3c990fb 3480
24a4e400
SG		 3481 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3482 elems.country_elem,
3483 elems.country_elem_len,
c8d65917
SG		 3484 elems.pwr_constr_elem,
3485 elems.cisco_dtpc_elem);
3f2355cb 3486
471b3efd 3487 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3488}
3489
1fa57d01
JB		 3490void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3491 struct sk_buff *skb)
f0706e82
JB		 3492{
3493 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3494 struct ieee80211_mgmt *mgmt;
3495 u16 fc;
1b3a2e49
JB		 3496 struct ieee802_11_elems elems;
3497 int ies_len;
f0706e82 3498
f0706e82
JB		 3499 rx_status = (struct ieee80211_rx_status *) skb->cb;
3500 mgmt = (struct ieee80211_mgmt *) skb->data;
3501 fc = le16_to_cpu(mgmt->frame_control);
3502
8d61ffa5 3503 sdata_lock(sdata);
77fdaa12 3504
66e67e41
JB		 3505 switch (fc & IEEE80211_FCTL_STYPE) {
3506 case IEEE80211_STYPE_BEACON:
8d61ffa5 3507 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3508 break;
3509 case IEEE80211_STYPE_PROBE_RESP:
3510 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3511 break;
3512 case IEEE80211_STYPE_AUTH:
8d61ffa5 3513 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3514 break;
3515 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3516 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3517 break;
3518 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3519 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3520 break;
3521 case IEEE80211_STYPE_ASSOC_RESP:
3522 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3523 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3524 break;
3525 case IEEE80211_STYPE_ACTION:
37799e52 3526 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3527 ies_len = skb->len -
3528 offsetof(struct ieee80211_mgmt,
3529 u.action.u.chan_switch.variable);
37799e52
JB		 3530
3531 if (ies_len < 0)
3532 break;
3533
3534 ieee802_11_parse_elems(
3535 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3536 ies_len, true, &elems);
37799e52
JB		 3537
3538 if (elems.parse_error)
3539 break;
3540
1b3a2e49 3541 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3542 rx_status->mactime,
3543 rx_status->device_timestamp,
3544 &elems, false);
1b3a2e49
JB		 3545 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3546 ies_len = skb->len -
3547 offsetof(struct ieee80211_mgmt,
3548 u.action.u.ext_chan_switch.variable);
3549
3550 if (ies_len < 0)
3551 break;
3552
3553 ieee802_11_parse_elems(
3554 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3555 ies_len, true, &elems);
1b3a2e49
JB		 3556
3557 if (elems.parse_error)
3558 break;
3559
3560 /* for the handling code pretend this was also an IE */
3561 elems.ext_chansw_ie =
3562 &mgmt->u.action.u.ext_chan_switch.data;
3563
66e67e41 3564 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3565 rx_status->mactime,
3566 rx_status->device_timestamp,
3567 &elems, false);
77fdaa12 3568 }
37799e52 3569 break;
77fdaa12 3570 }
8d61ffa5 3571 sdata_unlock(sdata);
f0706e82
JB		 3572}
3573
9c6bd790 3574static void ieee80211_sta_timer(unsigned long data)
f0706e82 3575{
60f8b39c
JB		 3576 struct ieee80211_sub_if_data *sdata =
3577 (struct ieee80211_sub_if_data *) data;
5bb644a0 3578
9b7d72c1 3579 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3580}
3581
04ac3c0e 3582static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3583 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3584{
6ae16775 3585 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3586
37ad3888 3587 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3588 tx, frame_buf);
37ad3888 3589
6ff57cf8
JB		 3590 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3591 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3592}
3593
66e67e41
JB		 3594static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3595{
3596 struct ieee80211_local *local = sdata->local;
3597 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3598 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3599 u32 tx_flags = 0;
66e67e41 3600
8d61ffa5 3601 sdata_assert_lock(sdata);
66e67e41
JB		 3602
3603 if (WARN_ON_ONCE(!auth_data))
3604 return -EINVAL;
3605
66e67e41
JB		 3606 auth_data->tries++;
3607
3608 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3609 sdata_info(sdata, "authentication with %pM timed out\n",
3610 auth_data->bss->bssid);
66e67e41
JB		 3611
3612 /*
3613 * Most likely AP is not in the range so remove the
3614 * bss struct for that AP.
3615 */
3616 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3617
3618 return -ETIMEDOUT;
3619 }
3620
a1845fc7
JB		 3621 drv_mgd_prepare_tx(local, sdata);
3622
66e67e41 3623 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3624 u16 trans = 1;
3625 u16 status = 0;
3626
bdcbd8e0
JB		 3627 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3628 auth_data->bss->bssid, auth_data->tries,
3629 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3630
3631 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3632
3633 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3634 trans = auth_data->sae_trans;
3635 status = auth_data->sae_status;
3636 auth_data->expected_transaction = trans;
3637 }
3638
6211dd12
SG		 3639 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3640 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3641 IEEE80211_TX_INTFL_MLME_CONN_TX;
3642
6b8ece3a
JM		 3643 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3644 auth_data->data, auth_data->data_len,
66e67e41 3645 auth_data->bss->bssid,
1672c0e3
JB		 3646 auth_data->bss->bssid, NULL, 0, 0,
3647 tx_flags);
66e67e41
JB		 3648 } else {
3649 const u8 *ssidie;
3650
bdcbd8e0
JB		 3651 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3652 auth_data->bss->bssid, auth_data->tries,
3653 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3654
9caf0364 3655 rcu_read_lock();
66e67e41 3656 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3657 if (!ssidie) {
3658 rcu_read_unlock();
66e67e41 3659 return -EINVAL;
9caf0364 3660 }
66e67e41
JB		 3661 /*
3662 * Direct probe is sent to broadcast address as some APs
3663 * will not answer to direct packet in unassociated state.
3664 */
a344d677
JB		 3665 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3666 ssidie + 2, ssidie[1],
6211dd12 3667 NULL, 0, (u32) -1, true, 0,
55de908a 3668 auth_data->bss->channel, false);
9caf0364 3669 rcu_read_unlock();
66e67e41
JB		 3670 }
3671
6211dd12 3672 if (tx_flags == 0) {
1672c0e3 3673 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3674 auth_data->timeout_started = true;
8d61ffa5 3675 run_again(sdata, auth_data->timeout);
89afe614 3676 } else {
cb236d2d
JB		 3677 auth_data->timeout =
3678 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3679 auth_data->timeout_started = true;
3680 run_again(sdata, auth_data->timeout);
1672c0e3 3681 }
66e67e41
JB		 3682
3683 return 0;
3684}
3685
3686static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3687{
3688 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3689 struct ieee80211_local *local = sdata->local;
3690
8d61ffa5 3691 sdata_assert_lock(sdata);
66e67e41 3692
66e67e41
JB		 3693 assoc_data->tries++;
3694 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3695 sdata_info(sdata, "association with %pM timed out\n",
3696 assoc_data->bss->bssid);
66e67e41
JB		 3697
3698 /*
3699 * Most likely AP is not in the range so remove the
3700 * bss struct for that AP.
3701 */
3702 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3703
3704 return -ETIMEDOUT;
3705 }
3706
bdcbd8e0
JB		 3707 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3708 assoc_data->bss->bssid, assoc_data->tries,
3709 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3710 ieee80211_send_assoc(sdata);
3711
1672c0e3
JB		 3712 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3713 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3714 assoc_data->timeout_started = true;
8d61ffa5 3715 run_again(sdata, assoc_data->timeout);
89afe614 3716 } else {
cb236d2d
JB		 3717 assoc_data->timeout =
3718 round_jiffies_up(jiffies +
3719 IEEE80211_ASSOC_TIMEOUT_LONG);
3720 assoc_data->timeout_started = true;
3721 run_again(sdata, assoc_data->timeout);
1672c0e3 3722 }
66e67e41
JB		 3723
3724 return 0;
3725}
3726
1672c0e3
JB		 3727void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3728 __le16 fc, bool acked)
3729{
3730 struct ieee80211_local *local = sdata->local;
3731
3732 sdata->u.mgd.status_fc = fc;
3733 sdata->u.mgd.status_acked = acked;
3734 sdata->u.mgd.status_received = true;
3735
3736 ieee80211_queue_work(&local->hw, &sdata->work);
3737}
3738
1fa57d01 3739void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3740{
9c6bd790 3741 struct ieee80211_local *local = sdata->local;
1fa57d01 3742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3743
8d61ffa5 3744 sdata_lock(sdata);
77fdaa12 3745
1672c0e3
JB		 3746 if (ifmgd->status_received) {
3747 __le16 fc = ifmgd->status_fc;
3748 bool status_acked = ifmgd->status_acked;
3749
3750 ifmgd->status_received = false;
3751 if (ifmgd->auth_data &&
3752 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3753 if (status_acked) {
3754 ifmgd->auth_data->timeout =
3755 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3756 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3757 } else {
3758 ifmgd->auth_data->timeout = jiffies - 1;
3759 }
89afe614 3760 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3761 } else if (ifmgd->assoc_data &&
3762 (ieee80211_is_assoc_req(fc) ||
3763 ieee80211_is_reassoc_req(fc))) {
3764 if (status_acked) {
3765 ifmgd->assoc_data->timeout =
3766 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3767 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3768 } else {
3769 ifmgd->assoc_data->timeout = jiffies - 1;
3770 }
89afe614 3771 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3772 }
3773 }
3774
89afe614 3775 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3776 time_after(jiffies, ifmgd->auth_data->timeout)) {
3777 if (ifmgd->auth_data->done) {
3778 /*
3779 * ok ... we waited for assoc but userspace didn't,
3780 * so let's just kill the auth data
3781 */
3782 ieee80211_destroy_auth_data(sdata, false);
3783 } else if (ieee80211_probe_auth(sdata)) {
3784 u8 bssid[ETH_ALEN];
3785
3786 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3787
3788 ieee80211_destroy_auth_data(sdata, false);
3789
6ff57cf8 3790 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3791 }
89afe614 3792 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3793 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3794
89afe614 3795 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3796 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3797 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3798 ieee80211_do_assoc(sdata)) {
959867fa 3799 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3800
3801 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3802 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3803 }
89afe614 3804 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3805 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3806
392b9ffb 3807 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3808 ifmgd->associated) {
a43abf29 3809 u8 bssid[ETH_ALEN];
72a8a3ed 3810 int max_tries;
a43abf29 3811
0c1ad2ca 3812 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3813
72a8a3ed 3814 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3815 max_tries = max_nullfunc_tries;
72a8a3ed 3816 else
180205bd 3817 max_tries = max_probe_tries;
72a8a3ed 3818
4e5ff376
FF		 3819 /* ACK received for nullfunc probing frame */
3820 if (!ifmgd->probe_send_count)
3821 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3822 else if (ifmgd->nullfunc_failed) {
3823 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3824 mlme_dbg(sdata,
3825 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3826 bssid, ifmgd->probe_send_count,
3827 max_tries);
04ac3c0e
FF		 3828 ieee80211_mgd_probe_ap_send(sdata);
3829 } else {
bdcbd8e0
JB		 3830 mlme_dbg(sdata,
3831 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3832 bssid);
95acac61 3833 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3834 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3835 false);
04ac3c0e
FF		 3836 }
3837 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3838 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3839 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3840 mlme_dbg(sdata,
3841 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3842 bssid, probe_wait_ms);
95acac61 3843 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3844 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3845 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3846 mlme_dbg(sdata,
3847 "No probe response from AP %pM after %dms, try %d/%i\n",
3848 bssid, probe_wait_ms,
3849 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3850 ieee80211_mgd_probe_ap_send(sdata);
3851 } else {
b291ba11
JB		 3852 /*
3853 * We actually lost the connection ... or did we?
3854 * Let's make sure!
3855 */
b38afa87
BG		 3856 wiphy_debug(local->hw.wiphy,
3857 "%s: No probe response from AP %pM"
3858 " after %dms, disconnecting.\n",
3859 sdata->name,
180205bd 3860 bssid, probe_wait_ms);
04ac3c0e 3861
95acac61 3862 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3863 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3864 }
3865 }
3866
8d61ffa5 3867 sdata_unlock(sdata);
f0706e82
JB		 3868}
3869
b291ba11
JB		 3870static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3871{
3872 struct ieee80211_sub_if_data *sdata =
3873 (struct ieee80211_sub_if_data *) data;
3874 struct ieee80211_local *local = sdata->local;
0c21e632 3875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11
JB		 3876
3877 if (local->quiescing)
3878 return;
3879
0c21e632 3880 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3881 return;
3882
682bd38b 3883 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3884 ieee80211_queue_work(&sdata->local->hw,
3885 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3886}
3887
3888static void ieee80211_sta_conn_mon_timer(unsigned long data)
3889{
3890 struct ieee80211_sub_if_data *sdata =
3891 (struct ieee80211_sub_if_data *) data;
3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3893 struct ieee80211_local *local = sdata->local;
3894
3895 if (local->quiescing)
3896 return;
3897
0c21e632 3898 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3899 return;
3900
42935eca 3901 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3902}
3903
3904static void ieee80211_sta_monitor_work(struct work_struct *work)
3905{
3906 struct ieee80211_sub_if_data *sdata =
3907 container_of(work, struct ieee80211_sub_if_data,
3908 u.mgd.monitor_work);
3909
3910 ieee80211_mgd_probe_ap(sdata, false);
3911}
3912
9c6bd790
JB		 3913static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3914{
494f1fe5
EP		 3915 u32 flags;
3916
ad935687 3917 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3918 __ieee80211_stop_poll(sdata);
ad935687 3919
b291ba11 3920 /* let's probe the connection once */
494f1fe5
EP		 3921 flags = sdata->local->hw.flags;
3922 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3923 ieee80211_queue_work(&sdata->local->hw,
3924 &sdata->u.mgd.monitor_work);
b291ba11 3925 /* and do all the other regular work too */
64592c8f 3926 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3927 }
9c6bd790 3928}
f0706e82 3929
b8360ab8 3930#ifdef CONFIG_PM
1a1cb744
JB		 3931void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3932{
3933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3934 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3935
3936 sdata_lock(sdata);
3937
c52666ae
EG		 3938 if (ifmgd->auth_data || ifmgd->assoc_data) {
3939 const u8 *bssid = ifmgd->auth_data ?
3940 ifmgd->auth_data->bss->bssid :
3941 ifmgd->assoc_data->bss->bssid;
3942
1a1cb744 3943 /*
c52666ae
EG		 3944 * If we are trying to authenticate / associate while suspending,
3945 * cfg80211 won't know and won't actually abort those attempts,
3946 * thus we need to do that ourselves.
1a1cb744 3947 */
c52666ae 3948 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3949 IEEE80211_STYPE_DEAUTH,
3950 WLAN_REASON_DEAUTH_LEAVING,
3951 false, frame_buf);
c52666ae
EG		 3952 if (ifmgd->assoc_data)
3953 ieee80211_destroy_assoc_data(sdata, false);
3954 if (ifmgd->auth_data)
3955 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3956 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3957 IEEE80211_DEAUTH_FRAME_LEN);
3958 }
3959
3960 sdata_unlock(sdata);
3961}
3962
b8360ab8
JB		 3963void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3964{
3965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3966
8d61ffa5 3967 sdata_lock(sdata);
b8360ab8 3968 if (!ifmgd->associated) {
8d61ffa5 3969 sdata_unlock(sdata);
b8360ab8
JB		 3970 return;
3971 }
3972
3973 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3974 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3975 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3976 ieee80211_sta_connection_lost(sdata,
3977 ifmgd->associated->bssid,
3978 WLAN_REASON_UNSPECIFIED,
3979 true);
8d61ffa5 3980 sdata_unlock(sdata);
b8360ab8
JB		 3981 return;
3982 }
8d61ffa5 3983 sdata_unlock(sdata);
b8360ab8
JB		 3984}
3985#endif
3986
9c6bd790
JB		 3987/* interface setup */
3988void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3989{
46900298 3990 struct ieee80211_if_managed *ifmgd;
988c0f72 3991
46900298 3992 ifmgd = &sdata->u.mgd;
b291ba11 3993 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3994 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3995 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3996 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3997 INIT_WORK(&ifmgd->csa_connection_drop_work,
3998 ieee80211_csa_connection_drop_work);
687da132 3999 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4000 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4001 ieee80211_tdls_peer_del_work);
46900298 4002 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4003 (unsigned long) sdata);
b291ba11
JB		 4004 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4005 (unsigned long) sdata);
4006 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4007 (unsigned long) sdata);
46900298 4008 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4009 (unsigned long) sdata);
02219b3a
JB		 4010 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4011 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4012
ab1faead 4013 ifmgd->flags = 0;
1478acb3 4014 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4015 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4016 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4017 ifmgd->p2p_noa_index = -1;
bbbdff9e 4018
0d8614b4 4019 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4020 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4021 else
4022 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4023
4024 /* Setup TDLS data */
4025 spin_lock_init(&ifmgd->teardown_lock);
4026 ifmgd->teardown_skb = NULL;
4027 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4028}
4029
77fdaa12
JB		 4030/* scan finished notification */
4031void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4032{
31ee67a1 4033 struct ieee80211_sub_if_data *sdata;
60f8b39c 4034
77fdaa12
JB		 4035 /* Restart STA timers */
4036 rcu_read_lock();
370bd005
BG		 4037 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4038 if (ieee80211_sdata_running(sdata))
4039 ieee80211_restart_sta_timer(sdata);
4040 }
77fdaa12
JB		 4041 rcu_read_unlock();
4042}
60f8b39c 4043
77fdaa12
JB		 4044int ieee80211_max_network_latency(struct notifier_block *nb,
4045 unsigned long data, void *dummy)
4046{
4047 s32 latency_usec = (s32) data;
4048 struct ieee80211_local *local =
4049 container_of(nb, struct ieee80211_local,
4050 network_latency_notifier);
1fa6f4af 4051
77fdaa12
JB		 4052 mutex_lock(&local->iflist_mtx);
4053 ieee80211_recalc_ps(local, latency_usec);
4054 mutex_unlock(&local->iflist_mtx);
dfe67012 4055
8bd811aa 4056 return NOTIFY_OK;
9c6bd790
JB		 4057}
4058
f2d9d270
JB		 4059static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4060 struct cfg80211_bss *cbss)
4061{
4062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4063 const u8 *ht_cap_ie, *vht_cap_ie;
4064 const struct ieee80211_ht_cap *ht_cap;
4065 const struct ieee80211_vht_cap *vht_cap;
4066 u8 chains = 1;
4067
4068 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4069 return chains;
4070
9caf0364 4071 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4072 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4073 ht_cap = (void *)(ht_cap_ie + 2);
4074 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4075 /*
4076 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4077 * "Tx Unequal Modulation Supported" fields.
4078 */
4079 }
4080
4081 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4082 return chains;
4083
9caf0364 4084 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4085 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4086 u8 nss;
4087 u16 tx_mcs_map;
4088
4089 vht_cap = (void *)(vht_cap_ie + 2);
4090 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4091 for (nss = 8; nss > 0; nss--) {
4092 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4093 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4094 break;
4095 }
4096 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4097 chains = max(chains, nss);
4098 }
4099
4100 return chains;
4101}
4102
b17166a7
JB		 4103static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4104 struct cfg80211_bss *cbss)
a1cf775d
JB		 4105{
4106 struct ieee80211_local *local = sdata->local;
4107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4108 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4109 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4110 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4111 struct ieee80211_supported_band *sband;
4bf88530 4112 struct cfg80211_chan_def chandef;
f2d9d270 4113 int ret;
a1cf775d 4114
24398e39
JB		 4115 sband = local->hw.wiphy->bands[cbss->channel->band];
4116
f2d9d270
JB		 4117 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4118 IEEE80211_STA_DISABLE_80P80MHZ |
4119 IEEE80211_STA_DISABLE_160MHZ);
4120
9caf0364
JB		 4121 rcu_read_lock();
4122
f2d9d270
JB		 4123 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4124 sband->ht_cap.ht_supported) {
53b954ee 4125 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4126
9caf0364 4127 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4128 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4129 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4130
53b954ee
EP		 4131 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4132 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4133 ht_cap = (void *)(ht_cap_ie + 2);
4134
4135 if (!ht_cap) {
08e6effa
JB		 4136 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4137 ht_oper = NULL;
4138 }
24398e39
JB		 4139 }
4140
f2d9d270
JB		 4141 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4142 sband->vht_cap.vht_supported) {
08e6effa 4143 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4144
9caf0364
JB		 4145 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4146 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4147 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4148 vht_oper = (void *)(vht_oper_ie + 2);
4149 if (vht_oper && !ht_oper) {
4150 vht_oper = NULL;
bdcbd8e0 4151 sdata_info(sdata,
f2d9d270 4152 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4153 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4154 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4155 }
08e6effa
JB		 4156
4157 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4158 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4159 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4160 vht_oper = NULL;
4161 }
24398e39
JB		 4162 }
4163
f2d9d270
JB		 4164 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4165 cbss->channel,
53b954ee 4166 ht_cap, ht_oper, vht_oper,
5cdaed1e 4167 &chandef, false);
04ecd257 4168
f2d9d270
JB		 4169 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4170 local->rx_chains);
24398e39 4171
9caf0364
JB		 4172 rcu_read_unlock();
4173
04ecd257
JB		 4174 /* will change later if needed */
4175 sdata->smps_mode = IEEE80211_SMPS_OFF;
4176
34a3740d 4177 mutex_lock(&local->mtx);
f2d9d270
JB		 4178 /*
4179 * If this fails (possibly due to channel context sharing
4180 * on incompatible channels, e.g. 80+80 and 160 sharing the
4181 * same control channel) try to use a smaller bandwidth.
4182 */
4183 ret = ieee80211_vif_use_channel(sdata, &chandef,
4184 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4185
4186 /* don't downgrade for 5 and 10 MHz channels, though. */
4187 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4188 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4189 goto out;
0418a445 4190
d601cd8d 4191 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4192 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4193 ret = ieee80211_vif_use_channel(sdata, &chandef,
4194 IEEE80211_CHANCTX_SHARED);
4195 }
34a3740d
JB		 4196 out:
4197 mutex_unlock(&local->mtx);
f2d9d270 4198 return ret;
b17166a7
JB		 4199}
4200
4201static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4202 struct cfg80211_bss *cbss, bool assoc)
4203{
4204 struct ieee80211_local *local = sdata->local;
4205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4206 struct ieee80211_bss *bss = (void *)cbss->priv;
4207 struct sta_info *new_sta = NULL;
179b8fc7
CRI		 4208 struct ieee80211_supported_band *sband;
4209 struct ieee80211_sta_ht_cap sta_ht_cap;
4210 bool have_sta = false, is_override = false;
b17166a7
JB		 4211 int err;
4212
179b8fc7
CRI		 4213 sband = local->hw.wiphy->bands[cbss->channel->band];
4214
b17166a7
JB		 4215 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4216 return -EINVAL;
4217
4218 if (assoc) {
4219 rcu_read_lock();
4220 have_sta = sta_info_get(sdata, cbss->bssid);
4221 rcu_read_unlock();
4222 }
4223
4224 if (!have_sta) {
4225 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4226 if (!new_sta)
4227 return -ENOMEM;
4228 }
179b8fc7
CRI		 4229
4230 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4231 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4232
4233 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4234 (sband->ht_cap.cap &
4235 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4236
4237 if (new_sta || is_override) {
4238 err = ieee80211_prep_channel(sdata, cbss);
4239 if (err) {
4240 if (new_sta)
4241 sta_info_free(local, new_sta);
4242 return -EINVAL;
4243 }
4244 }
4245
13e0c8e3 4246 if (new_sta) {
5d6a1b06
JB		 4247 u32 rates = 0, basic_rates = 0;
4248 bool have_higher_than_11mbit;
4249 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4250 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4251 const struct cfg80211_bss_ies *ies;
179b8fc7 4252 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4253 u32 rate_flags;
b17166a7 4254
2103dec1
SW		 4255 rcu_read_lock();
4256 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4257 if (WARN_ON(!chanctx_conf)) {
4258 rcu_read_unlock();
c368ddaa 4259 sta_info_free(local, new_sta);
2103dec1
SW		 4260 return -EINVAL;
4261 }
4262 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4263 rcu_read_unlock();
5d6a1b06 4264
5d6a1b06
JB		 4265 ieee80211_get_rates(sband, bss->supp_rates,
4266 bss->supp_rates_len,
4267 &rates, &basic_rates,
4268 &have_higher_than_11mbit,
2103dec1
SW		 4269 &min_rate, &min_rate_index,
4270 shift, rate_flags);
5d6a1b06
JB		 4271
4272 /*
4273 * This used to be a workaround for basic rates missing
4274 * in the association response frame. Now that we no
4275 * longer use the basic rates from there, it probably
4276 * doesn't happen any more, but keep the workaround so
4277 * in case some *other* APs are buggy in different ways
4278 * we can connect -- with a warning.
4279 */
4280 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4281 sdata_info(sdata,
4282 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4283 basic_rates = BIT(min_rate_index);
4284 }
4285
13e0c8e3 4286 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4287 sdata->vif.bss_conf.basic_rates = basic_rates;
4288
4289 /* cf. IEEE 802.11 9.2.12 */
55de908a 4290 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4291 have_higher_than_11mbit)
4292 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4293 else
4294 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4295
4296 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4297
8c358bcd
JB		 4298 /* set timing information */
4299 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4300 rcu_read_lock();
ef429dad
JB		 4301 ies = rcu_dereference(cbss->beacon_ies);
4302 if (ies) {
4303 const u8 *tim_ie;
4304
4305 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4306 sdata->vif.bss_conf.sync_device_ts =
4307 bss->device_ts_beacon;
4308 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4309 ies->data, ies->len);
4310 if (tim_ie && tim_ie[1] >= 2)
4311 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4312 else
4313 sdata->vif.bss_conf.sync_dtim_count = 0;
4314 } else if (!(local->hw.flags &
4315 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4316 ies = rcu_dereference(cbss->proberesp_ies);
4317 /* must be non-NULL since beacon IEs were NULL */
4318 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4319 sdata->vif.bss_conf.sync_device_ts =
4320 bss->device_ts_presp;
4321 sdata->vif.bss_conf.sync_dtim_count = 0;
4322 } else {
4323 sdata->vif.bss_conf.sync_tsf = 0;
4324 sdata->vif.bss_conf.sync_device_ts = 0;
4325 sdata->vif.bss_conf.sync_dtim_count = 0;
4326 }
8cef2c9d 4327 rcu_read_unlock();
8c358bcd
JB		 4328
4329 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4330 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4331 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4332 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4333
4334 if (assoc)
13e0c8e3 4335 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4336
13e0c8e3
JB		 4337 err = sta_info_insert(new_sta);
4338 new_sta = NULL;
a1cf775d 4339 if (err) {
bdcbd8e0
JB		 4340 sdata_info(sdata,
4341 "failed to insert STA entry for the AP (error %d)\n",
4342 err);
a1cf775d
JB		 4343 return err;
4344 }
4345 } else
b203ca39 4346 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4347
4348 return 0;
4349}
4350
77fdaa12
JB		 4351/* config hooks */
4352int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4353 struct cfg80211_auth_request *req)
9c6bd790 4354{
66e67e41
JB		 4355 struct ieee80211_local *local = sdata->local;
4356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4357 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4358 u16 auth_alg;
66e67e41
JB		 4359 int err;
4360
4361 /* prepare auth data structure */
9c6bd790 4362
77fdaa12
JB		 4363 switch (req->auth_type) {
4364 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4365 auth_alg = WLAN_AUTH_OPEN;
4366 break;
4367 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4368 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4369 return -EOPNOTSUPP;
77fdaa12
JB		 4370 auth_alg = WLAN_AUTH_SHARED_KEY;
4371 break;
4372 case NL80211_AUTHTYPE_FT:
4373 auth_alg = WLAN_AUTH_FT;
4374 break;
4375 case NL80211_AUTHTYPE_NETWORK_EAP:
4376 auth_alg = WLAN_AUTH_LEAP;
4377 break;
6b8ece3a
JM		 4378 case NL80211_AUTHTYPE_SAE:
4379 auth_alg = WLAN_AUTH_SAE;
4380 break;
77fdaa12
JB		 4381 default:
4382 return -EOPNOTSUPP;
60f8b39c 4383 }
77fdaa12 4384
6b8ece3a
JM		 4385 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4386 req->ie_len, GFP_KERNEL);
66e67e41 4387 if (!auth_data)
9c6bd790 4388 return -ENOMEM;
77fdaa12 4389
66e67e41 4390 auth_data->bss = req->bss;
77fdaa12 4391
6b8ece3a
JM		 4392 if (req->sae_data_len >= 4) {
4393 __le16 *pos = (__le16 *) req->sae_data;
4394 auth_data->sae_trans = le16_to_cpu(pos[0]);
4395 auth_data->sae_status = le16_to_cpu(pos[1]);
4396 memcpy(auth_data->data, req->sae_data + 4,
4397 req->sae_data_len - 4);
4398 auth_data->data_len += req->sae_data_len - 4;
4399 }
4400
77fdaa12 4401 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4402 memcpy(&auth_data->data[auth_data->data_len],
4403 req->ie, req->ie_len);
4404 auth_data->data_len += req->ie_len;
9c6bd790 4405 }
77fdaa12 4406
fffd0934 4407 if (req->key && req->key_len) {
66e67e41
JB		 4408 auth_data->key_len = req->key_len;
4409 auth_data->key_idx = req->key_idx;
4410 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4411 }
4412
66e67e41 4413 auth_data->algorithm = auth_alg;
60f8b39c 4414
66e67e41 4415 /* try to authenticate/probe */
2a33bee2 4416
66e67e41
JB		 4417 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4418 ifmgd->assoc_data) {
4419 err = -EBUSY;
4420 goto err_free;
2a33bee2
GE		 4421 }
4422
66e67e41
JB		 4423 if (ifmgd->auth_data)
4424 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4425
66e67e41
JB		 4426 /* prep auth_data so we don't go into idle on disassoc */
4427 ifmgd->auth_data = auth_data;
af6b6374 4428
7b119dc0
JB		 4429 if (ifmgd->associated) {
4430 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4431
4432 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4433 WLAN_REASON_UNSPECIFIED,
4434 false, frame_buf);
4435
6ff57cf8
JB		 4436 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4437 sizeof(frame_buf));
7b119dc0 4438 }
af6b6374 4439
bdcbd8e0 4440 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4441
a1cf775d
JB		 4442 err = ieee80211_prep_connection(sdata, req->bss, false);
4443 if (err)
66e67e41 4444 goto err_clear;
af6b6374 4445
66e67e41
JB		 4446 err = ieee80211_probe_auth(sdata);
4447 if (err) {
66e67e41
JB		 4448 sta_info_destroy_addr(sdata, req->bss->bssid);
4449 goto err_clear;
4450 }
4451
4452 /* hold our own reference */
5b112d3d 4453 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4454 return 0;
66e67e41
JB		 4455
4456 err_clear:
3d2abdfd
EP		 4457 memset(ifmgd->bssid, 0, ETH_ALEN);
4458 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4459 ifmgd->auth_data = NULL;
4460 err_free:
4461 kfree(auth_data);
66e67e41 4462 return err;
af6b6374
JB		 4463}
4464
095d81ce
JB		 4465static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4466 const u8 *wmm_param, int len)
4467{
4468 const u8 *pos;
4469 size_t left;
4470
4471 if (len < 8)
4472 return false;
4473
4474 if (wmm_param[5] != 1 /* version */)
4475 return false;
4476
4477 pos = wmm_param + 8;
4478 left = len - 8;
4479
4480 for (; left >= 4; left -= 4, pos += 4) {
4481 u8 aifsn = pos[0] & 0x0f;
4482 u8 ecwmin = pos[1] & 0x0f;
4483 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4484 int aci = (pos[0] >> 5) & 0x03;
4485
4486 if (aifsn < 2) {
4487 sdata_info(sdata,
4488 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4489 aifsn, aci);
4490 return false;
4491 }
4492 if (ecwmin > ecwmax) {
4493 sdata_info(sdata,
4494 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4495 ecwmin, ecwmax, aci);
4496 return false;
4497 }
4498 }
4499
4500 return true;
4501}
4502
77fdaa12
JB		 4503int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4504 struct cfg80211_assoc_request *req)
f0706e82 4505{
66e67e41 4506 struct ieee80211_local *local = sdata->local;
77fdaa12 4507 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4508 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4509 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4510 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4511 struct ieee80211_supported_band *sband;
b08fbbd8 4512 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4513 int i, err;
f0706e82 4514
66e67e41
JB		 4515 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4516 if (!assoc_data)
4517 return -ENOMEM;
4518
9caf0364
JB		 4519 rcu_read_lock();
4520 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4521 if (!ssidie) {
4522 rcu_read_unlock();
4523 kfree(assoc_data);
4524 return -EINVAL;
4525 }
4526 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4527 assoc_data->ssid_len = ssidie[1];
4528 rcu_read_unlock();
4529
7b119dc0
JB		 4530 if (ifmgd->associated) {
4531 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4532
4533 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4534 WLAN_REASON_UNSPECIFIED,
4535 false, frame_buf);
4536
6ff57cf8
JB		 4537 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4538 sizeof(frame_buf));
7b119dc0 4539 }
66e67e41
JB		 4540
4541 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4542 err = -EBUSY;
4543 goto err_free;
af6b6374 4544 }
77fdaa12 4545
66e67e41
JB		 4546 if (ifmgd->assoc_data) {
4547 err = -EBUSY;
4548 goto err_free;
4549 }
77fdaa12 4550
66e67e41
JB		 4551 if (ifmgd->auth_data) {
4552 bool match;
4553
4554 /* keep sta info, bssid if matching */
b203ca39 4555 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4556 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4557 }
4558
66e67e41 4559 /* prepare assoc data */
095d81ce 4560
d8ec4433
JO		 4561 ifmgd->beacon_crc_valid = false;
4562
095d81ce
JB		 4563 assoc_data->wmm = bss->wmm_used &&
4564 (local->hw.queues >= IEEE80211_NUM_ACS);
4565 if (assoc_data->wmm) {
4566 /* try to check validity of WMM params IE */
4567 const struct cfg80211_bss_ies *ies;
4568 const u8 *wp, *start, *end;
4569
4570 rcu_read_lock();
4571 ies = rcu_dereference(req->bss->ies);
4572 start = ies->data;
4573 end = start + ies->len;
4574
4575 while (true) {
4576 wp = cfg80211_find_vendor_ie(
4577 WLAN_OUI_MICROSOFT,
4578 WLAN_OUI_TYPE_MICROSOFT_WMM,
4579 start, end - start);
4580 if (!wp)
4581 break;
4582 start = wp + wp[1] + 2;
4583 /* if this IE is too short, try the next */
4584 if (wp[1] <= 4)
4585 continue;
4586 /* if this IE is WMM params, we found what we wanted */
4587 if (wp[6] == 1)
4588 break;
4589 }
4590
4591 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4592 wp[1] - 2)) {
4593 assoc_data->wmm = false;
4594 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4595 }
4596 rcu_read_unlock();
4597 }
4598
de5036aa
JB		 4599 /*
4600 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4601 * We still associate in non-HT mode (11a/b/g) if any one of these
4602 * ciphers is configured as pairwise.
4603 * We can set this to true for non-11n hardware, that'll be checked
4604 * separately along with the peer capabilities.
4605 */
1c4cb928 4606 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4607 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4608 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4609 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4610 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4611 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4612 netdev_info(sdata->dev,
d545daba 4613 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4614 }
4615 }
77fdaa12 4616
d545daba 4617 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4618 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4619 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4620 }
ef96a842 4621
dd5ecfea
JB		 4622 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4623 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4624
4e74bfdb
JB		 4625 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4626 sband = local->hw.wiphy->bands[req->bss->channel->band];
4627 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4628 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4629 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4630 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4631 if (!bss->wmm_used &&
4632 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4633 netdev_info(sdata->dev,
4634 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4635 }
4e74bfdb 4636
d545daba
MP		 4637 /* disable VHT if we don't support it or the AP doesn't use WMM */
4638 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4639 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4640 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4641 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4642 if (!bss->wmm_used &&
4643 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4644 netdev_info(sdata->dev,
4645 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4646 }
4647
ef96a842
BG		 4648 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4649 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4650 sizeof(ifmgd->ht_capa_mask));
4651
dd5ecfea
JB		 4652 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4653 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4654 sizeof(ifmgd->vht_capa_mask));
4655
77fdaa12 4656 if (req->ie && req->ie_len) {
66e67e41
JB		 4657 memcpy(assoc_data->ie, req->ie, req->ie_len);
4658 assoc_data->ie_len = req->ie_len;
4659 }
f679f65d 4660
66e67e41 4661 assoc_data->bss = req->bss;
f679f65d 4662
af6b6374
JB		 4663 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4664 if (ifmgd->powersave)
04ecd257 4665 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4666 else
04ecd257 4667 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4668 } else
04ecd257 4669 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4670
66e67e41 4671 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4672 assoc_data->supp_rates = bss->supp_rates;
4673 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4674
9caf0364 4675 rcu_read_lock();
9dde6423
JB		 4676 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4677 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4678 assoc_data->ap_ht_param =
4679 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4680 else
a8243b72 4681 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4682 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4683 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4684 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4685 sizeof(struct ieee80211_vht_cap));
4686 else
4687 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4688 rcu_read_unlock();
63f170e0 4689
848955cc
JB		 4690 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4691 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4692 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4693 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4694
ab13315a 4695 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4696 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4697 assoc_data->uapsd = true;
ab13315a
KV		 4698 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4699 } else {
76f0303d 4700 assoc_data->uapsd = false;
ab13315a
KV		 4701 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4702 }
4703
77fdaa12 4704 if (req->prev_bssid)
66e67e41 4705 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4706
4707 if (req->use_mfp) {
4708 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4709 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4710 } else {
4711 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4712 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4713 }
4714
cd2f5dd7
AK		 4715 if (req->flags & ASSOC_REQ_USE_RRM)
4716 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4717 else
4718 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4719
77fdaa12
JB		 4720 if (req->crypto.control_port)
4721 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4722 else
4723 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4724
a621fa4d
JB		 4725 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4726 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4727 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4728 sdata->vif.type);
a621fa4d 4729
66e67e41
JB		 4730 /* kick off associate process */
4731
4732 ifmgd->assoc_data = assoc_data;
826262c3 4733 ifmgd->dtim_period = 0;
989c6505 4734 ifmgd->have_beacon = false;
66e67e41 4735
a1cf775d
JB		 4736 err = ieee80211_prep_connection(sdata, req->bss, true);
4737 if (err)
4738 goto err_clear;
66e67e41 4739
c65dd147
EG		 4740 rcu_read_lock();
4741 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4742
c65dd147
EG		 4743 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4744 !beacon_ies) {
4745 /*
4746 * Wait up to one beacon interval ...
4747 * should this be more if we miss one?
4748 */
4749 sdata_info(sdata, "waiting for beacon from %pM\n",
4750 ifmgd->bssid);
4751 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4752 assoc_data->timeout_started = true;
c65dd147
EG		 4753 assoc_data->need_beacon = true;
4754 } else if (beacon_ies) {
4755 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4756 beacon_ies->data,
4757 beacon_ies->len);
ef429dad
JB		 4758 u8 dtim_count = 0;
4759
c65dd147
EG		 4760 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4761 const struct ieee80211_tim_ie *tim;
4762 tim = (void *)(tim_ie + 2);
4763 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4764 dtim_count = tim->dtim_count;
826262c3 4765 }
989c6505 4766 ifmgd->have_beacon = true;
66e67e41 4767 assoc_data->timeout = jiffies;
89afe614 4768 assoc_data->timeout_started = true;
ef429dad
JB		 4769
4770 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4771 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4772 sdata->vif.bss_conf.sync_device_ts =
4773 bss->device_ts_beacon;
4774 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4775 }
c65dd147
EG		 4776 } else {
4777 assoc_data->timeout = jiffies;
89afe614 4778 assoc_data->timeout_started = true;
66e67e41 4779 }
c65dd147
EG		 4780 rcu_read_unlock();
4781
8d61ffa5 4782 run_again(sdata, assoc_data->timeout);
66e67e41 4783
fcff4f10
PS		 4784 if (bss->corrupt_data) {
4785 char *corrupt_type = "data";
4786 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4787 if (bss->corrupt_data &
4788 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4789 corrupt_type = "beacon and probe response";
4790 else
4791 corrupt_type = "beacon";
4792 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4793 corrupt_type = "probe response";
bdcbd8e0
JB		 4794 sdata_info(sdata, "associating with AP with corrupt %s\n",
4795 corrupt_type);
fcff4f10
PS		 4796 }
4797
8d61ffa5 4798 return 0;
66e67e41 4799 err_clear:
3d2abdfd
EP		 4800 memset(ifmgd->bssid, 0, ETH_ALEN);
4801 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4802 ifmgd->assoc_data = NULL;
4803 err_free:
4804 kfree(assoc_data);
66e67e41 4805 return err;
f0706e82
JB		 4806}
4807
77fdaa12 4808int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4809 struct cfg80211_deauth_request *req)
f0706e82 4810{
46900298 4811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4812 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4813 bool tx = !req->local_state_change;
f0706e82 4814
c9c3a060
JB		 4815 if (ifmgd->auth_data &&
4816 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4817 sdata_info(sdata,
4818 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4819 req->bssid, req->reason_code,
4820 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4821
8c7d857c 4822 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4823 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4824 IEEE80211_STYPE_DEAUTH,
6863255b 4825 req->reason_code, tx,
37ad3888 4826 frame_buf);
86552017 4827 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4828 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4829 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4830
c9c3a060 4831 return 0;
8c7d857c
EG		 4832 }
4833
86552017
JB		 4834 if (ifmgd->associated &&
4835 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4836 sdata_info(sdata,
4837 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4838 req->bssid, req->reason_code,
4839 ieee80211_get_reason_code_string(req->reason_code));
4840
86552017
JB		 4841 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4842 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4843 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4844 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4845 return 0;
4846 }
86552017 4847
c9c3a060 4848 return -ENOTCONN;
f0706e82 4849}
84363e6e 4850
77fdaa12 4851int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4852 struct cfg80211_disassoc_request *req)
9c6bd790 4853{
77fdaa12 4854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4855 u8 bssid[ETH_ALEN];
6ae16775 4856 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4857
8d8b261a
JB		 4858 /*
4859 * cfg80211 should catch this ... but it's racy since
4860 * we can receive a disassoc frame, process it, hand it
4861 * to cfg80211 while that's in a locked section already
4862 * trying to tell us that the user wants to disconnect.
4863 */
8d61ffa5 4864 if (ifmgd->associated != req->bss)
77fdaa12 4865 return -ENOLINK;
77fdaa12 4866
bdcbd8e0 4867 sdata_info(sdata,
dfa1ad29
CO		 4868 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4869 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4870
e69e95db 4871 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4872 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4873 req->reason_code, !req->local_state_change,
4874 frame_buf);
10f644a4 4875
6ff57cf8
JB		 4876 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4877 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4878
10f644a4
JB		 4879 return 0;
4880}
026331c4 4881
afa762f6 4882void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4883{
4884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4885
49921859
BG		 4886 /*
4887 * Make sure some work items will not run after this,
4888 * they will not do anything but might not have been
4889 * cancelled when disconnecting.
4890 */
4891 cancel_work_sync(&ifmgd->monitor_work);
4892 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4893 cancel_work_sync(&ifmgd->request_smps_work);
4894 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4895 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4896 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4897
8d61ffa5 4898 sdata_lock(sdata);
959867fa
JB		 4899 if (ifmgd->assoc_data) {
4900 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4901 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4902 cfg80211_assoc_timeout(sdata->dev, bss);
4903 }
54e4ffb2
JB		 4904 if (ifmgd->auth_data)
4905 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4906 spin_lock_bh(&ifmgd->teardown_lock);
4907 if (ifmgd->teardown_skb) {
4908 kfree_skb(ifmgd->teardown_skb);
4909 ifmgd->teardown_skb = NULL;
4910 ifmgd->orig_teardown_skb = NULL;
4911 }
4912 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 4913 del_timer_sync(&ifmgd->timer);
8d61ffa5 4914 sdata_unlock(sdata);
54e4ffb2
JB		 4915}
4916
a97c13c3
JO		 4917void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4918 enum nl80211_cqm_rssi_threshold_event rssi_event,
4919 gfp_t gfp)
4920{
4921 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4922
b5878a2d
JB		 4923 trace_api_cqm_rssi_notify(sdata, rssi_event);
4924
a97c13c3
JO		 4925 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4926}
4927EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 4928
4929void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4930{
4931 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4932
4933 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4934
4935 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4936}
4937EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
This page took 1.133027 seconds and 5 git commands to generate.