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mac80211: reduce indentation by inlining a check
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
322cd406 9 * Copyright (C) 2015 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
5b323edb 16#include <linux/delay.h>
f0706e82
JB		 17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
f0706e82 19#include <linux/if_arp.h>
f0706e82 20#include <linux/etherdevice.h>
d9b93842 21#include <linux/moduleparam.h>
d0709a65 22#include <linux/rtnetlink.h>
e8db0be1 23#include <linux/pm_qos.h>
d91f36db 24#include <linux/crc32.h>
5a0e3ad6 25#include <linux/slab.h>
bc3b2d7f 26#include <linux/export.h>
f0706e82 27#include <net/mac80211.h>
472dbc45 28#include <asm/unaligned.h>
60f8b39c 29
f0706e82 30#include "ieee80211_i.h"
24487981 31#include "driver-ops.h"
2c8dccc7
JB		 32#include "rate.h"
33#include "led.h"
f0706e82 34
1672c0e3 35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 36#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 37#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 41#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 42#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 44
180205bd
BG		 45static int max_nullfunc_tries = 2;
46module_param(max_nullfunc_tries, int, 0644);
47MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50static int max_probe_tries = 5;
51module_param(max_probe_tries, int, 0644);
52MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 54
55/*
7ccc8bd7
FF		 56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
b291ba11 62 */
59c1ec2b
BG		 63static int beacon_loss_count = 7;
64module_param(beacon_loss_count, int, 0644);
65MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 67
b291ba11
JB		 68/*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
d1c5091f 72#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 73/*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
180205bd
BG		 78static int probe_wait_ms = 500;
79module_param(probe_wait_ms, int, 0644);
80MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
f0706e82 83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
ca386f31
JB		 90/*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
8d61ffa5
JB		 100static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
ca386f31 102{
8d61ffa5 103 sdata_assert_lock(sdata);
ca386f31 104
8d61ffa5
JB		 105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 108}
109
d3a910a8 110void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 111{
c1288b12 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 113 return;
114
30686bf7 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 116 return;
117
b291ba11 118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 120}
121
be099e82
LR		 122void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123{
0c699c3a
LR		 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
8628172f
SG		 126 if (unlikely(!sdata->u.mgd.associated))
127 return;
128
448cd2e2
EP		 129 ifmgd->probe_send_count = 0;
130
30686bf7 131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 132 return;
133
134 mod_timer(&sdata->u.mgd.conn_mon_timer,
135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
136}
137
5484e237 138static int ecw2cw(int ecw)
60f8b39c 139{
5484e237 140 return (1 << ecw) - 1;
60f8b39c
JB		 141}
142
6565ec9b
JB		 143static u32
144ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
145 struct ieee80211_supported_band *sband,
146 struct ieee80211_channel *channel,
53b954ee 147 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 150 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 151{
5cdaed1e 152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 153 struct cfg80211_chan_def vht_chandef;
179b8fc7 154 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 155 u32 ht_cfreq, ret;
156
179b8fc7
CRI		 157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159
6565ec9b
JB		 160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
179b8fc7 165 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
53b954ee
EP		 172 if (!(ht_cap->cap_info &
173 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 174 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 175 vht_chandef = *chandef;
53b954ee
EP		 176 goto out;
177 }
178
6565ec9b
JB		 179 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
180 channel->band);
181 /* check that channel matches the right operating channel */
5cdaed1e 182 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 183 /*
184 * It's possible that some APs are confused here;
185 * Netgear WNDR3700 sometimes reports 4 higher than
186 * the actual channel in association responses, but
187 * since we look at probe response/beacon data here
188 * it should be OK.
189 */
5cdaed1e
JB		 190 sdata_info(sdata,
191 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
192 channel->center_freq, ht_cfreq,
193 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 194 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
195 goto out;
196 }
197
198 /* check 40 MHz support, if we have it */
179b8fc7 199 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 200 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
201 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
202 chandef->width = NL80211_CHAN_WIDTH_40;
203 chandef->center_freq1 += 10;
204 break;
205 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
206 chandef->width = NL80211_CHAN_WIDTH_40;
207 chandef->center_freq1 -= 10;
208 break;
209 }
210 } else {
211 /* 40 MHz (and 80 MHz) must be supported for VHT */
212 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 213 /* also mark 40 MHz disabled */
214 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 215 goto out;
216 }
217
218 if (!vht_oper || !sband->vht_cap.vht_supported) {
219 ret = IEEE80211_STA_DISABLE_VHT;
220 goto out;
221 }
222
223 vht_chandef.chan = channel;
224 vht_chandef.center_freq1 =
225 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
226 channel->band);
227 vht_chandef.center_freq2 = 0;
228
6565ec9b
JB		 229 switch (vht_oper->chan_width) {
230 case IEEE80211_VHT_CHANWIDTH_USE_HT:
231 vht_chandef.width = chandef->width;
cb664981 232 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 233 break;
234 case IEEE80211_VHT_CHANWIDTH_80MHZ:
235 vht_chandef.width = NL80211_CHAN_WIDTH_80;
236 break;
237 case IEEE80211_VHT_CHANWIDTH_160MHZ:
238 vht_chandef.width = NL80211_CHAN_WIDTH_160;
239 break;
240 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 242 vht_chandef.center_freq2 =
243 ieee80211_channel_to_frequency(
244 vht_oper->center_freq_seg2_idx,
245 channel->band);
6565ec9b
JB		 246 break;
247 default:
5cdaed1e 248 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 249 sdata_info(sdata,
250 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
251 vht_oper->chan_width);
6565ec9b
JB		 252 ret = IEEE80211_STA_DISABLE_VHT;
253 goto out;
254 }
255
256 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 258 sdata_info(sdata,
259 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 260 ret = IEEE80211_STA_DISABLE_VHT;
261 goto out;
262 }
263
264 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
265 ret = 0;
266 goto out;
267 }
268
269 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 271 sdata_info(sdata,
272 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 273 ret = IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 *chandef = vht_chandef;
278
279 ret = 0;
280
281out:
963a1852
JB		 282 /*
283 * When tracking the current AP, don't do any further checks if the
284 * new chandef is identical to the one we're currently using for the
285 * connection. This keeps us from playing ping-pong with regulatory,
286 * without it the following can happen (for example):
287 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
288 * - AP advertises regdom US
289 * - CRDA loads regdom US with 80 MHz prohibited (old database)
290 * - the code below detects an unsupported channel, downgrades, and
291 * we disconnect from the AP in the caller
292 * - disconnect causes CRDA to reload world regdomain and the game
293 * starts anew.
294 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
295 *
296 * It seems possible that there are still scenarios with CSA or real
297 * bandwidth changes where a this could happen, but those cases are
298 * less common and wouldn't completely prevent using the AP.
299 */
300 if (tracking &&
301 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
302 return ret;
303
586e01ed
JB		 304 /* don't print the message below for VHT mismatch if VHT is disabled */
305 if (ret & IEEE80211_STA_DISABLE_VHT)
306 vht_chandef = *chandef;
307
ddfe49b4
JB		 308 /*
309 * Ignore the DISABLED flag when we're already connected and only
310 * tracking the APs beacon for bandwidth changes - otherwise we
311 * might get disconnected here if we connect to an AP, update our
312 * regulatory information based on the AP's country IE and the
313 * information we have is wrong/outdated and disables the channel
314 * that we're actually using for the connection to the AP.
315 */
6565ec9b 316 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 317 tracking ? 0 :
318 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 319 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
320 ret = IEEE80211_STA_DISABLE_HT |
321 IEEE80211_STA_DISABLE_VHT;
b56e4b85 322 break;
6565ec9b
JB		 323 }
324
e6b7cde4 325 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 326 }
327
5cdaed1e 328 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 329 sdata_info(sdata,
330 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
331
332 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
333 return ret;
334}
335
30eb1dc2
JB		 336static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
337 struct sta_info *sta,
53b954ee 338 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 339 const struct ieee80211_ht_operation *ht_oper,
340 const struct ieee80211_vht_operation *vht_oper,
341 const u8 *bssid, u32 *changed)
d5522e03
JB		 342{
343 struct ieee80211_local *local = sdata->local;
30eb1dc2 344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 345 struct ieee80211_supported_band *sband;
55de908a 346 struct ieee80211_channel *chan;
30eb1dc2 347 struct cfg80211_chan_def chandef;
9ed6bcce 348 u16 ht_opmode;
30eb1dc2
JB		 349 u32 flags;
350 enum ieee80211_sta_rx_bandwidth new_sta_bw;
351 int ret;
d5522e03 352
30eb1dc2
JB		 353 /* if HT was/is disabled, don't track any bandwidth changes */
354 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 355 return 0;
356
30eb1dc2
JB		 357 /* don't check VHT if we associated as non-VHT station */
358 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
359 vht_oper = NULL;
360
361 if (WARN_ON_ONCE(!sta))
362 return -EINVAL;
363
017b45bb
AA		 364 /*
365 * if bss configuration changed store the new one -
366 * this may be applicable even if channel is identical
367 */
368 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
369 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
370 *changed |= BSS_CHANGED_HT;
371 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
372 }
373
f2d9330e 374 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 375 sband = local->hw.wiphy->bands[chan->band];
d5522e03 376
30eb1dc2 377 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 378 flags = ieee80211_determine_chantype(sdata, sband, chan,
379 ht_cap, ht_oper, vht_oper,
380 &chandef, true);
30eb1dc2
JB		 381
382 /*
383 * Downgrade the new channel if we associated with restricted
384 * capabilities. For example, if we associated as a 20 MHz STA
385 * to a 40 MHz AP (due to regulatory, capabilities or config
386 * reasons) then switching to a 40 MHz channel now won't do us
387 * any good -- we couldn't use it with the AP.
388 */
389 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
390 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 391 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 392 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
393 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 394 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 395 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
396 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 397 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 398
399 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
400 return 0;
401
402 sdata_info(sdata,
403 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
404 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
405 chandef.center_freq1, chandef.center_freq2);
406
407 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
408 IEEE80211_STA_DISABLE_VHT |
409 IEEE80211_STA_DISABLE_40MHZ |
410 IEEE80211_STA_DISABLE_80P80MHZ |
411 IEEE80211_STA_DISABLE_160MHZ)) ||
412 !cfg80211_chandef_valid(&chandef)) {
413 sdata_info(sdata,
414 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
415 ifmgd->bssid);
416 return -EINVAL;
417 }
418
419 switch (chandef.width) {
420 case NL80211_CHAN_WIDTH_20_NOHT:
421 case NL80211_CHAN_WIDTH_20:
422 new_sta_bw = IEEE80211_STA_RX_BW_20;
423 break;
4bf88530 424 case NL80211_CHAN_WIDTH_40:
30eb1dc2 425 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 426 break;
30eb1dc2
JB		 427 case NL80211_CHAN_WIDTH_80:
428 new_sta_bw = IEEE80211_STA_RX_BW_80;
429 break;
430 case NL80211_CHAN_WIDTH_80P80:
431 case NL80211_CHAN_WIDTH_160:
432 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 433 break;
30eb1dc2
JB		 434 default:
435 return -EINVAL;
64f68e5d 436 }
d5522e03 437
30eb1dc2
JB		 438 if (new_sta_bw > sta->cur_max_bandwidth)
439 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 440
30eb1dc2
JB		 441 if (new_sta_bw < sta->sta.bandwidth) {
442 sta->sta.bandwidth = new_sta_bw;
443 rate_control_rate_update(local, sband, sta,
444 IEEE80211_RC_BW_CHANGED);
445 }
64f68e5d 446
30eb1dc2
JB		 447 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
448 if (ret) {
449 sdata_info(sdata,
450 "AP %pM changed bandwidth to incompatible one - disconnect\n",
451 ifmgd->bssid);
452 return ret;
453 }
7cc44ed4 454
30eb1dc2
JB		 455 if (new_sta_bw > sta->sta.bandwidth) {
456 sta->sta.bandwidth = new_sta_bw;
457 rate_control_rate_update(local, sband, sta,
458 IEEE80211_RC_BW_CHANGED);
0aaffa9b 459 }
d5522e03 460
30eb1dc2 461 return 0;
d5522e03
JB		 462}
463
9c6bd790
JB		 464/* frame sending functions */
465
66e67e41 466static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 467 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 468 struct ieee80211_supported_band *sband,
469 struct ieee80211_channel *channel,
470 enum ieee80211_smps_mode smps)
471{
66e67e41
JB		 472 u8 *pos;
473 u32 flags = channel->flags;
474 u16 cap;
475 struct ieee80211_sta_ht_cap ht_cap;
476
477 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
478
66e67e41
JB		 479 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
480 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
481
66e67e41
JB		 482 /* determine capability flags */
483 cap = ht_cap.cap;
484
9dde6423 485 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 486 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
487 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
488 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
489 cap &= ~IEEE80211_HT_CAP_SGI_40;
490 }
491 break;
492 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
493 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 }
499
24398e39
JB		 500 /*
501 * If 40 MHz was disabled associate as though we weren't
502 * capable of 40 MHz -- some broken APs will never fall
503 * back to trying to transmit in 20 MHz.
504 */
505 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
506 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
507 cap &= ~IEEE80211_HT_CAP_SGI_40;
508 }
509
66e67e41
JB		 510 /* set SM PS mode properly */
511 cap &= ~IEEE80211_HT_CAP_SM_PS;
512 switch (smps) {
513 case IEEE80211_SMPS_AUTOMATIC:
514 case IEEE80211_SMPS_NUM_MODES:
515 WARN_ON(1);
516 case IEEE80211_SMPS_OFF:
517 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
518 IEEE80211_HT_CAP_SM_PS_SHIFT;
519 break;
520 case IEEE80211_SMPS_STATIC:
521 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
522 IEEE80211_HT_CAP_SM_PS_SHIFT;
523 break;
524 case IEEE80211_SMPS_DYNAMIC:
525 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
526 IEEE80211_HT_CAP_SM_PS_SHIFT;
527 break;
528 }
529
530 /* reserve and fill IE */
531 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
532 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
533}
534
322cd406
SS		 535/* This function determines vht capability flags for the association
536 * and builds the IE.
537 * Note - the function may set the owner of the MU-MIMO capability
538 */
d545daba
MP		 539static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
540 struct sk_buff *skb,
b08fbbd8
JB		 541 struct ieee80211_supported_band *sband,
542 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 543{
322cd406 544 struct ieee80211_local *local = sdata->local;
d545daba
MP		 545 u8 *pos;
546 u32 cap;
547 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 548 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 549
550 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
551
552 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 553 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 554
555 /* determine capability flags */
556 cap = vht_cap.cap;
557
f2d9d270 558 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 559 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
562 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
563 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
564 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 565 }
566
567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
568 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 569 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 570 }
571
b08fbbd8
JB		 572 /*
573 * Some APs apparently get confused if our capabilities are better
574 * than theirs, so restrict what we advertise in the assoc request.
575 */
576 if (!(ap_vht_cap->vht_cap_info &
577 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 578 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
579 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
580 else if (!(ap_vht_cap->vht_cap_info &
581 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
582 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
583
584 /*
585 * If some other vif is using the MU-MIMO capablity we cannot associate
586 * using MU-MIMO - this will lead to contradictions in the group-id
587 * mechanism.
588 * Ownership is defined since association request, in order to avoid
589 * simultaneous associations with MU-MIMO.
590 */
591 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
592 bool disable_mu_mimo = false;
593 struct ieee80211_sub_if_data *other;
594
595 list_for_each_entry_rcu(other, &local->interfaces, list) {
596 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
597 disable_mu_mimo = true;
598 break;
599 }
600 }
601 if (disable_mu_mimo)
602 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
603 else
604 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
605 }
b08fbbd8 606
c1cf6d4e
ES		 607 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
608
609 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
610 our_bf_sts = cap & mask;
611
612 if (ap_bf_sts < our_bf_sts) {
613 cap &= ~mask;
614 cap |= ap_bf_sts;
615 }
616
d545daba 617 /* reserve and fill IE */
d4950281 618 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 619 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
620}
621
66e67e41
JB		 622static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
623{
624 struct ieee80211_local *local = sdata->local;
625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
626 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
627 struct sk_buff *skb;
628 struct ieee80211_mgmt *mgmt;
629 u8 *pos, qos_info;
630 size_t offset = 0, noffset;
2103dec1 631 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 632 u16 capab;
633 struct ieee80211_supported_band *sband;
55de908a
JB		 634 struct ieee80211_chanctx_conf *chanctx_conf;
635 struct ieee80211_channel *chan;
2103dec1 636 u32 rate_flags, rates = 0;
66e67e41 637
8d61ffa5 638 sdata_assert_lock(sdata);
66e67e41 639
55de908a
JB		 640 rcu_read_lock();
641 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
642 if (WARN_ON(!chanctx_conf)) {
643 rcu_read_unlock();
644 return;
645 }
4bf88530 646 chan = chanctx_conf->def.chan;
2103dec1 647 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 648 rcu_read_unlock();
649 sband = local->hw.wiphy->bands[chan->band];
2103dec1 650 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 651
652 if (assoc_data->supp_rates_len) {
653 /*
654 * Get all rates supported by the device and the AP as
655 * some APs don't like getting a superset of their rates
656 * in the association request (e.g. D-Link DAP 1353 in
657 * b-only mode)...
658 */
2103dec1
SW		 659 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
660 assoc_data->supp_rates,
661 assoc_data->supp_rates_len,
662 &rates);
66e67e41
JB		 663 } else {
664 /*
665 * In case AP not provide any supported rates information
666 * before association, we send information element(s) with
667 * all rates that we support.
668 */
2103dec1
SW		 669 rates_len = 0;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if ((rate_flags & sband->bitrates[i].flags)
672 != rate_flags)
673 continue;
674 rates |= BIT(i);
675 rates_len++;
676 }
66e67e41
JB		 677 }
678
679 skb = alloc_skb(local->hw.extra_tx_headroom +
680 sizeof(*mgmt) + /* bit too much but doesn't matter */
681 2 + assoc_data->ssid_len + /* SSID */
682 4 + rates_len + /* (extended) rates */
683 4 + /* power capability */
684 2 + 2 * sband->n_channels + /* supported channels */
685 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 686 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 687 assoc_data->ie_len + /* extra IEs */
688 9, /* WMM */
689 GFP_KERNEL);
690 if (!skb)
691 return;
692
693 skb_reserve(skb, local->hw.extra_tx_headroom);
694
695 capab = WLAN_CAPABILITY_ESS;
696
697 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 698 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
699 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 700 }
701
702 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
703 capab |= WLAN_CAPABILITY_PRIVACY;
704
705 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 706 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 707 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
708
cd2f5dd7
AK		 709 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
710 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
711
66e67e41
JB		 712 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
713 memset(mgmt, 0, 24);
714 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
715 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
716 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
717
718 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
719 skb_put(skb, 10);
720 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
721 IEEE80211_STYPE_REASSOC_REQ);
722 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
723 mgmt->u.reassoc_req.listen_interval =
724 cpu_to_le16(local->hw.conf.listen_interval);
725 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
726 ETH_ALEN);
727 } else {
728 skb_put(skb, 4);
729 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
730 IEEE80211_STYPE_ASSOC_REQ);
731 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
732 mgmt->u.assoc_req.listen_interval =
733 cpu_to_le16(local->hw.conf.listen_interval);
734 }
735
736 /* SSID */
737 pos = skb_put(skb, 2 + assoc_data->ssid_len);
738 *pos++ = WLAN_EID_SSID;
739 *pos++ = assoc_data->ssid_len;
740 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
741
742 /* add all rates which were marked to be used above */
743 supp_rates_len = rates_len;
744 if (supp_rates_len > 8)
745 supp_rates_len = 8;
746
747 pos = skb_put(skb, supp_rates_len + 2);
748 *pos++ = WLAN_EID_SUPP_RATES;
749 *pos++ = supp_rates_len;
750
751 count = 0;
752 for (i = 0; i < sband->n_bitrates; i++) {
753 if (BIT(i) & rates) {
2103dec1
SW		 754 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
755 5 * (1 << shift));
756 *pos++ = (u8) rate;
66e67e41
JB		 757 if (++count == 8)
758 break;
759 }
760 }
761
762 if (rates_len > count) {
763 pos = skb_put(skb, rates_len - count + 2);
764 *pos++ = WLAN_EID_EXT_SUPP_RATES;
765 *pos++ = rates_len - count;
766
767 for (i++; i < sband->n_bitrates; i++) {
768 if (BIT(i) & rates) {
2103dec1
SW		 769 int rate;
770 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
771 5 * (1 << shift));
772 *pos++ = (u8) rate;
66e67e41
JB		 773 }
774 }
775 }
776
cd2f5dd7
AK		 777 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
778 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 779 pos = skb_put(skb, 4);
780 *pos++ = WLAN_EID_PWR_CAPABILITY;
781 *pos++ = 2;
782 *pos++ = 0; /* min tx power */
0430c883
SW		 783 /* max tx power */
784 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 785 }
66e67e41 786
cd2f5dd7 787 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 788 /* TODO: get this in reg domain format */
789 pos = skb_put(skb, 2 * sband->n_channels + 2);
790 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
791 *pos++ = 2 * sband->n_channels;
792 for (i = 0; i < sband->n_channels; i++) {
793 *pos++ = ieee80211_frequency_to_channel(
794 sband->channels[i].center_freq);
795 *pos++ = 1; /* one channel in the subband*/
796 }
797 }
798
799 /* if present, add any custom IEs that go before HT */
b3f51e94 800 if (assoc_data->ie_len) {
66e67e41
JB		 801 static const u8 before_ht[] = {
802 WLAN_EID_SSID,
803 WLAN_EID_SUPP_RATES,
804 WLAN_EID_EXT_SUPP_RATES,
805 WLAN_EID_PWR_CAPABILITY,
806 WLAN_EID_SUPPORTED_CHANNELS,
807 WLAN_EID_RSN,
808 WLAN_EID_QOS_CAPA,
809 WLAN_EID_RRM_ENABLED_CAPABILITIES,
810 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 811 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
812 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
814 };
8ed28747
JB		 815 static const u8 after_ric[] = {
816 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
817 WLAN_EID_HT_CAPABILITY,
818 WLAN_EID_BSS_COEX_2040,
819 WLAN_EID_EXT_CAPABILITY,
820 WLAN_EID_QOS_TRAFFIC_CAPA,
821 WLAN_EID_TIM_BCAST_REQ,
822 WLAN_EID_INTERWORKING,
823 /* 60GHz doesn't happen right now */
824 WLAN_EID_VHT_CAPABILITY,
825 WLAN_EID_OPMODE_NOTIF,
826 };
827
828 noffset = ieee80211_ie_split_ric(assoc_data->ie,
829 assoc_data->ie_len,
830 before_ht,
831 ARRAY_SIZE(before_ht),
832 after_ric,
833 ARRAY_SIZE(after_ric),
834 offset);
66e67e41
JB		 835 pos = skb_put(skb, noffset - offset);
836 memcpy(pos, assoc_data->ie + offset, noffset - offset);
837 offset = noffset;
838 }
839
f2d9d270
JB		 840 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
841 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
842 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
843
a8243b72 844 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 845 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 846 sband, chan, sdata->smps_mode);
66e67e41 847
3de3802c
JB		 848 /* if present, add any custom IEs that go before VHT */
849 if (assoc_data->ie_len) {
850 static const u8 before_vht[] = {
851 WLAN_EID_SSID,
852 WLAN_EID_SUPP_RATES,
853 WLAN_EID_EXT_SUPP_RATES,
854 WLAN_EID_PWR_CAPABILITY,
855 WLAN_EID_SUPPORTED_CHANNELS,
856 WLAN_EID_RSN,
857 WLAN_EID_QOS_CAPA,
858 WLAN_EID_RRM_ENABLED_CAPABILITIES,
859 WLAN_EID_MOBILITY_DOMAIN,
860 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
861 WLAN_EID_HT_CAPABILITY,
862 WLAN_EID_BSS_COEX_2040,
863 WLAN_EID_EXT_CAPABILITY,
864 WLAN_EID_QOS_TRAFFIC_CAPA,
865 WLAN_EID_TIM_BCAST_REQ,
866 WLAN_EID_INTERWORKING,
867 };
8ed28747
JB		 868
869 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 870 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
871 before_vht, ARRAY_SIZE(before_vht),
872 offset);
873 pos = skb_put(skb, noffset - offset);
874 memcpy(pos, assoc_data->ie + offset, noffset - offset);
875 offset = noffset;
876 }
877
d545daba 878 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 879 ieee80211_add_vht_ie(sdata, skb, sband,
880 &assoc_data->ap_vht_cap);
d545daba 881
66e67e41 882 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 883 if (assoc_data->ie_len) {
66e67e41
JB		 884 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
885 assoc_data->ie_len,
886 offset);
887 pos = skb_put(skb, noffset - offset);
888 memcpy(pos, assoc_data->ie + offset, noffset - offset);
889 offset = noffset;
890 }
891
76f0303d
JB		 892 if (assoc_data->wmm) {
893 if (assoc_data->uapsd) {
dc41e4d4
EP		 894 qos_info = ifmgd->uapsd_queues;
895 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 896 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
897 } else {
898 qos_info = 0;
899 }
900
40b861a0 901 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 902 }
903
904 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 905 if (assoc_data->ie_len) {
66e67e41
JB		 906 noffset = assoc_data->ie_len;
907 pos = skb_put(skb, noffset - offset);
908 memcpy(pos, assoc_data->ie + offset, noffset - offset);
909 }
910
a1845fc7
JB		 911 drv_mgd_prepare_tx(local, sdata);
912
66e67e41 913 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 914 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
916 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 917 ieee80211_tx_skb(sdata, skb);
918}
919
572e0012
KV		 920void ieee80211_send_pspoll(struct ieee80211_local *local,
921 struct ieee80211_sub_if_data *sdata)
922{
572e0012
KV		 923 struct ieee80211_pspoll *pspoll;
924 struct sk_buff *skb;
572e0012 925
d8cd189e
KV		 926 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
927 if (!skb)
572e0012 928 return;
572e0012 929
d8cd189e
KV		 930 pspoll = (struct ieee80211_pspoll *) skb->data;
931 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 932
62ae67be
JB		 933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
934 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 935}
936
965bedad
JB		 937void ieee80211_send_nullfunc(struct ieee80211_local *local,
938 struct ieee80211_sub_if_data *sdata,
939 int powersave)
940{
941 struct sk_buff *skb;
d8cd189e 942 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 944
d8cd189e
KV		 945 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
946 if (!skb)
965bedad 947 return;
965bedad 948
d8cd189e 949 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 950 if (powersave)
d8cd189e 951 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 952
6c17b77b
SF		 953 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
954 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 955
30686bf7 956 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 957 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
958
392b9ffb 959 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 960 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
961
62ae67be 962 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 963}
964
d524215f
FF		 965static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
966 struct ieee80211_sub_if_data *sdata)
967{
968 struct sk_buff *skb;
969 struct ieee80211_hdr *nullfunc;
970 __le16 fc;
971
972 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
973 return;
974
975 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 976 if (!skb)
d524215f 977 return;
d15b8459 978
d524215f
FF		 979 skb_reserve(skb, local->hw.extra_tx_headroom);
980
981 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
982 memset(nullfunc, 0, 30);
983 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
984 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
985 nullfunc->frame_control = fc;
986 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
987 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
988 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
989 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
990
991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
992 ieee80211_tx_skb(sdata, skb);
993}
994
cc32abd4
JB		 995/* spectrum management related things */
996static void ieee80211_chswitch_work(struct work_struct *work)
997{
998 struct ieee80211_sub_if_data *sdata =
999 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 1000 struct ieee80211_local *local = sdata->local;
cc32abd4 1001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 1002 int ret;
cc32abd4 1003
9607e6b6 1004 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 1005 return;
1006
8d61ffa5 1007 sdata_lock(sdata);
4c3ebc56
MK		 1008 mutex_lock(&local->mtx);
1009 mutex_lock(&local->chanctx_mtx);
1010
77fdaa12
JB		 1011 if (!ifmgd->associated)
1012 goto out;
cc32abd4 1013
4c3ebc56
MK		 1014 if (!sdata->vif.csa_active)
1015 goto out;
1016
1017 /*
1018 * using reservation isn't immediate as it may be deferred until later
1019 * with multi-vif. once reservation is complete it will re-schedule the
1020 * work with no reserved_chanctx so verify chandef to check if it
1021 * completed successfully
1022 */
1023
1024 if (sdata->reserved_chanctx) {
1025 /*
1026 * with multi-vif csa driver may call ieee80211_csa_finish()
1027 * many times while waiting for other interfaces to use their
1028 * reservations
1029 */
1030 if (sdata->reserved_ready)
1031 goto out;
1032
1033 ret = ieee80211_vif_use_reserved_context(sdata);
1034 if (ret) {
1035 sdata_info(sdata,
1036 "failed to use reserved channel context, disconnecting (err=%d)\n",
1037 ret);
1038 ieee80211_queue_work(&sdata->local->hw,
1039 &ifmgd->csa_connection_drop_work);
1040 goto out;
1041 }
1042
1043 goto out;
1044 }
1045
1046 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1047 &sdata->csa_chandef)) {
7578d575 1048 sdata_info(sdata,
4c3ebc56 1049 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1050 ieee80211_queue_work(&sdata->local->hw,
1051 &ifmgd->csa_connection_drop_work);
1052 goto out;
1053 }
675a0b04 1054
cc32abd4 1055 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1056 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1057
0c21e632
LC		 1058 ifmgd->csa_waiting_bcn = true;
1059
1060 ieee80211_sta_reset_beacon_monitor(sdata);
1061 ieee80211_sta_reset_conn_monitor(sdata);
1062
1063out:
1064 mutex_unlock(&local->chanctx_mtx);
1065 mutex_unlock(&local->mtx);
1066 sdata_unlock(sdata);
1067}
1068
1069static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1070{
1071 struct ieee80211_local *local = sdata->local;
1072 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1073 int ret;
1074
1075 sdata_assert_lock(sdata);
1076
1077 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1078
a46992b4
LC		 1079 if (sdata->csa_block_tx) {
1080 ieee80211_wake_vif_queues(local, sdata,
1081 IEEE80211_QUEUE_STOP_REASON_CSA);
1082 sdata->csa_block_tx = false;
1083 }
7578d575 1084
0c21e632
LC		 1085 sdata->vif.csa_active = false;
1086 ifmgd->csa_waiting_bcn = false;
1087
f1d65583
LC		 1088 ret = drv_post_channel_switch(sdata);
1089 if (ret) {
1090 sdata_info(sdata,
1091 "driver post channel switch failed, disconnecting\n");
1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
0c21e632 1094 return;
f1d65583 1095 }
688b1ecf
LC		 1096
1097 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1098}
1099
5ce6e438
JB		 1100void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1101{
55de908a
JB		 1102 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1104
1105 trace_api_chswitch_done(sdata, success);
1106 if (!success) {
882a7c69
JB		 1107 sdata_info(sdata,
1108 "driver channel switch failed, disconnecting\n");
1109 ieee80211_queue_work(&sdata->local->hw,
1110 &ifmgd->csa_connection_drop_work);
1111 } else {
1112 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1113 }
5ce6e438
JB		 1114}
1115EXPORT_SYMBOL(ieee80211_chswitch_done);
1116
cc32abd4
JB		 1117static void ieee80211_chswitch_timer(unsigned long data)
1118{
1119 struct ieee80211_sub_if_data *sdata =
1120 (struct ieee80211_sub_if_data *) data;
5bb644a0 1121
9b7d72c1 1122 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1123}
1124
37799e52 1125static void
4a3cb702 1126ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1127 u64 timestamp, u32 device_timestamp,
1128 struct ieee802_11_elems *elems,
04a161f4 1129 bool beacon)
cc32abd4 1130{
b4f286a1 1131 struct ieee80211_local *local = sdata->local;
cc32abd4 1132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1133 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1134 struct ieee80211_chanctx_conf *conf;
55de908a 1135 struct ieee80211_chanctx *chanctx;
e6b7cde4 1136 enum ieee80211_band current_band;
c0f17eb9 1137 struct ieee80211_csa_ie csa_ie;
6d027bcc 1138 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1139 int res;
cc32abd4 1140
8d61ffa5 1141 sdata_assert_lock(sdata);
77fdaa12 1142
37799e52 1143 if (!cbss)
cc32abd4
JB		 1144 return;
1145
b4f286a1 1146 if (local->scanning)
cc32abd4
JB		 1147 return;
1148
37799e52 1149 /* disregard subsequent announcements if we are already processing */
3e2a0226 1150 if (sdata->vif.csa_active)
cc32abd4
JB		 1151 return;
1152
e6b7cde4 1153 current_band = cbss->channel->band;
c0f17eb9 1154 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1155 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1156 ifmgd->flags,
c0f17eb9 1157 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1158 if (res < 0)
b4f286a1 1159 ieee80211_queue_work(&local->hw,
882a7c69 1160 &ifmgd->csa_connection_drop_work);
e6b7cde4 1161 if (res)
cc32abd4 1162 return;
cd64f2a9 1163
c0f17eb9 1164 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1165 IEEE80211_CHAN_DISABLED)) {
1166 sdata_info(sdata,
1167 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1168 ifmgd->associated->bssid,
c0f17eb9
CYY		 1169 csa_ie.chandef.chan->center_freq,
1170 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1171 csa_ie.chandef.center_freq2);
85220d71
JB		 1172 ieee80211_queue_work(&local->hw,
1173 &ifmgd->csa_connection_drop_work);
1174 return;
1175 }
1176
f84eaa10
JB		 1177 if (cfg80211_chandef_identical(&csa_ie.chandef,
1178 &sdata->vif.bss_conf.chandef)) {
1179 if (ifmgd->csa_ignored_same_chan)
1180 return;
1181 sdata_info(sdata,
1182 "AP %pM tries to chanswitch to same channel, ignore\n",
1183 ifmgd->associated->bssid);
1184 ifmgd->csa_ignored_same_chan = true;
1185 return;
1186 }
1187
c5a71688
AN		 1188 /*
1189 * Drop all TDLS peers - either we disconnect or move to a different
1190 * channel from this point on. There's no telling what our peer will do.
1191 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1192 * have an incompatible wider chandef.
1193 */
1194 ieee80211_teardown_tdls_peers(sdata);
1195
4c3ebc56 1196 mutex_lock(&local->mtx);
7578d575 1197 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1198 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1199 lockdep_is_held(&local->chanctx_mtx));
1200 if (!conf) {
1201 sdata_info(sdata,
1202 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1203 goto drop_connection;
4c3ebc56
MK		 1204 }
1205
1206 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1207
0f791eb4 1208 if (local->use_chanctx &&
30686bf7 1209 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1210 sdata_info(sdata,
1211 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1212 goto drop_connection;
55de908a
JB		 1213 }
1214
6d027bcc
LC		 1215 ch_switch.timestamp = timestamp;
1216 ch_switch.device_timestamp = device_timestamp;
1217 ch_switch.block_tx = csa_ie.mode;
1218 ch_switch.chandef = csa_ie.chandef;
1219 ch_switch.count = csa_ie.count;
1220
1221 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1222 sdata_info(sdata,
1223 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1224 goto drop_connection;
6d027bcc
LC		 1225 }
1226
4c3ebc56
MK		 1227 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1228 chanctx->mode, false);
1229 if (res) {
55de908a 1230 sdata_info(sdata,
4c3ebc56
MK		 1231 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1232 res);
f3b0bbb3 1233 goto drop_connection;
55de908a 1234 }
b4f286a1 1235 mutex_unlock(&local->chanctx_mtx);
55de908a 1236
c46a73f3 1237 sdata->vif.csa_active = true;
4c3ebc56 1238 sdata->csa_chandef = csa_ie.chandef;
59af6928 1239 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1240 ifmgd->csa_ignored_same_chan = false;
55de908a 1241
59af6928 1242 if (sdata->csa_block_tx)
a46992b4
LC		 1243 ieee80211_stop_vif_queues(local, sdata,
1244 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1245 mutex_unlock(&local->mtx);
57eebdf3 1246
2f457293
LC		 1247 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1248 csa_ie.count);
1249
b4f286a1 1250 if (local->ops->channel_switch) {
5ce6e438 1251 /* use driver's channel switch callback */
0f791eb4 1252 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1253 return;
1254 }
1255
1256 /* channel switch handled in software */
c0f17eb9 1257 if (csa_ie.count <= 1)
b4f286a1 1258 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1259 else
cc32abd4 1260 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1261 TU_TO_EXP_TIME((csa_ie.count - 1) *
1262 cbss->beacon_interval));
f3b0bbb3
JB		 1263 return;
1264 drop_connection:
1265 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1266 mutex_unlock(&local->chanctx_mtx);
1267 mutex_unlock(&local->mtx);
cc32abd4
JB		 1268}
1269
24a4e400
SG		 1270static bool
1271ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1272 struct ieee80211_channel *channel,
1273 const u8 *country_ie, u8 country_ie_len,
1274 const u8 *pwr_constr_elem,
1275 int *chan_pwr, int *pwr_reduction)
cc32abd4 1276{
04b7b2ff
JB		 1277 struct ieee80211_country_ie_triplet *triplet;
1278 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1279 int i, chan_increment;
04b7b2ff 1280 bool have_chan_pwr = false;
cc32abd4 1281
04b7b2ff
JB		 1282 /* Invalid IE */
1283 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1284 return false;
cc32abd4 1285
04b7b2ff
JB		 1286 triplet = (void *)(country_ie + 3);
1287 country_ie_len -= 3;
1288
1289 switch (channel->band) {
1290 default:
1291 WARN_ON_ONCE(1);
1292 /* fall through */
1293 case IEEE80211_BAND_2GHZ:
1294 case IEEE80211_BAND_60GHZ:
1295 chan_increment = 1;
1296 break;
1297 case IEEE80211_BAND_5GHZ:
1298 chan_increment = 4;
1299 break;
cc32abd4 1300 }
04b7b2ff
JB		 1301
1302 /* find channel */
1303 while (country_ie_len >= 3) {
1304 u8 first_channel = triplet->chans.first_channel;
1305
1306 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1307 goto next;
1308
1309 for (i = 0; i < triplet->chans.num_channels; i++) {
1310 if (first_channel + i * chan_increment == chan) {
1311 have_chan_pwr = true;
24a4e400 1312 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1313 break;
1314 }
1315 }
1316 if (have_chan_pwr)
1317 break;
1318
1319 next:
1320 triplet++;
1321 country_ie_len -= 3;
1322 }
1323
a5fee9cb 1324 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1325 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1326 else
1327 *pwr_reduction = 0;
1328
24a4e400
SG		 1329 return have_chan_pwr;
1330}
1331
c8d65917
SG		 1332static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1333 struct ieee80211_channel *channel,
1334 const u8 *cisco_dtpc_ie,
1335 int *pwr_level)
1336{
1337 /* From practical testing, the first data byte of the DTPC element
1338 * seems to contain the requested dBm level, and the CLI on Cisco
1339 * APs clearly state the range is -127 to 127 dBm, which indicates
1340 * a signed byte, although it seemingly never actually goes negative.
1341 * The other byte seems to always be zero.
1342 */
1343 *pwr_level = (__s8)cisco_dtpc_ie[4];
1344}
1345
24a4e400
SG		 1346static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1347 struct ieee80211_channel *channel,
1348 struct ieee80211_mgmt *mgmt,
1349 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1350 const u8 *pwr_constr_ie,
1351 const u8 *cisco_dtpc_ie)
24a4e400 1352{
c8d65917
SG		 1353 bool has_80211h_pwr = false, has_cisco_pwr = false;
1354 int chan_pwr = 0, pwr_reduction_80211h = 0;
1355 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1356 int new_ap_level;
a5fee9cb 1357 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1358
a5fee9cb
MB		 1359 if (country_ie &&
1360 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1361 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1362 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1363 sdata, channel, country_ie, country_ie_len,
1364 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1365 pwr_level_80211h =
1366 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1367 }
1368
1369 if (cisco_dtpc_ie) {
1370 ieee80211_find_cisco_dtpc(
1371 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1372 has_cisco_pwr = true;
24a4e400 1373 }
04b7b2ff 1374
c8d65917 1375 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1376 return 0;
04b7b2ff 1377
c8d65917
SG		 1378 /* If we have both 802.11h and Cisco DTPC, apply both limits
1379 * by picking the smallest of the two power levels advertised.
1380 */
1381 if (has_80211h_pwr &&
1382 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1383 sdata_dbg(sdata,
1384 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1385 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1386 sdata->u.mgd.bssid);
c8d65917
SG		 1387 new_ap_level = pwr_level_80211h;
1388 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1389 sdata_dbg(sdata,
1390 "Limiting TX power to %d dBm as advertised by %pM\n",
1391 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1392 new_ap_level = pwr_level_cisco;
1393 }
04b7b2ff 1394
1ea6f9c0
JB		 1395 if (sdata->ap_power_level == new_ap_level)
1396 return 0;
04b7b2ff 1397
1ea6f9c0
JB		 1398 sdata->ap_power_level = new_ap_level;
1399 if (__ieee80211_recalc_txpower(sdata))
1400 return BSS_CHANGED_TXPOWER;
1401 return 0;
cc32abd4
JB		 1402}
1403
965bedad
JB		 1404/* powersave */
1405static void ieee80211_enable_ps(struct ieee80211_local *local,
1406 struct ieee80211_sub_if_data *sdata)
1407{
1408 struct ieee80211_conf *conf = &local->hw.conf;
1409
d5edaedc
JB		 1410 /*
1411 * If we are scanning right now then the parameters will
1412 * take effect when scan finishes.
1413 */
fbe9c429 1414 if (local->scanning)
d5edaedc
JB		 1415 return;
1416
965bedad 1417 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1418 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1419 mod_timer(&local->dynamic_ps_timer, jiffies +
1420 msecs_to_jiffies(conf->dynamic_ps_timeout));
1421 } else {
30686bf7 1422 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
965bedad 1423 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1424
30686bf7
JB		 1425 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1426 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1427 return;
1428
1429 conf->flags |= IEEE80211_CONF_PS;
1430 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1431 }
1432}
1433
1434static void ieee80211_change_ps(struct ieee80211_local *local)
1435{
1436 struct ieee80211_conf *conf = &local->hw.conf;
1437
1438 if (local->ps_sdata) {
965bedad
JB		 1439 ieee80211_enable_ps(local, local->ps_sdata);
1440 } else if (conf->flags & IEEE80211_CONF_PS) {
1441 conf->flags &= ~IEEE80211_CONF_PS;
1442 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1443 del_timer_sync(&local->dynamic_ps_timer);
1444 cancel_work_sync(&local->dynamic_ps_enable_work);
1445 }
1446}
1447
808118cb
JY		 1448static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1449{
1450 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1451 struct sta_info *sta = NULL;
c2c98fde 1452 bool authorized = false;
808118cb
JY		 1453
1454 if (!mgd->powersave)
1455 return false;
1456
05cb9108
JB		 1457 if (mgd->broken_ap)
1458 return false;
1459
808118cb
JY		 1460 if (!mgd->associated)
1461 return false;
1462
392b9ffb 1463 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1464 return false;
1465
989c6505 1466 if (!mgd->have_beacon)
ce857888
AB		 1467 return false;
1468
808118cb
JY		 1469 rcu_read_lock();
1470 sta = sta_info_get(sdata, mgd->bssid);
1471 if (sta)
c2c98fde 1472 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1473 rcu_read_unlock();
1474
c2c98fde 1475 return authorized;
808118cb
JY		 1476}
1477
965bedad 1478/* need to hold RTNL or interface lock */
10f644a4 1479void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1480{
1481 struct ieee80211_sub_if_data *sdata, *found = NULL;
1482 int count = 0;
195e294d 1483 int timeout;
965bedad 1484
30686bf7 1485 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1486 local->ps_sdata = NULL;
1487 return;
1488 }
1489
1490 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1491 if (!ieee80211_sdata_running(sdata))
965bedad 1492 continue;
8c7914de
RM		 1493 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1494 /* If an AP vif is found, then disable PS
1495 * by setting the count to zero thereby setting
1496 * ps_sdata to NULL.
1497 */
1498 count = 0;
1499 break;
1500 }
965bedad
JB		 1501 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1502 continue;
1503 found = sdata;
1504 count++;
1505 }
1506
808118cb 1507 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1508 s32 beaconint_us;
1509
1510 if (latency < 0)
ed77134b 1511 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1512
1513 beaconint_us = ieee80211_tu_to_usec(
1514 found->vif.bss_conf.beacon_int);
1515
ff616381 1516 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1517 if (timeout < 0) {
1518 /*
ff616381
JO		 1519 * Go to full PSM if the user configures a very low
1520 * latency requirement.
0ab82b04
EP		 1521 * The 2000 second value is there for compatibility
1522 * until the PM_QOS_NETWORK_LATENCY is configured
1523 * with real values.
195e294d 1524 */
0ab82b04
EP		 1525 if (latency > (1900 * USEC_PER_MSEC) &&
1526 latency != (2000 * USEC_PER_SEC))
195e294d 1527 timeout = 0;
ff616381
JO		 1528 else
1529 timeout = 100;
195e294d 1530 }
09b85568 1531 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1532
04fe2037 1533 if (beaconint_us > latency) {
10f644a4 1534 local->ps_sdata = NULL;
04fe2037 1535 } else {
04fe2037 1536 int maxslp = 1;
826262c3 1537 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1538
1539 /* If the TIM IE is invalid, pretend the value is 1 */
1540 if (!dtimper)
1541 dtimper = 1;
1542 else if (dtimper > 1)
04fe2037
JB		 1543 maxslp = min_t(int, dtimper,
1544 latency / beaconint_us);
1545
9ccebe61 1546 local->hw.conf.max_sleep_period = maxslp;
56007a02 1547 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1548 local->ps_sdata = found;
04fe2037 1549 }
10f644a4 1550 } else {
965bedad 1551 local->ps_sdata = NULL;
10f644a4 1552 }
965bedad
JB		 1553
1554 ieee80211_change_ps(local);
1555}
1556
ab095877
EP		 1557void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1558{
1559 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1560
1561 if (sdata->vif.bss_conf.ps != ps_allowed) {
1562 sdata->vif.bss_conf.ps = ps_allowed;
1563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1564 }
1565}
1566
965bedad
JB		 1567void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1568{
1569 struct ieee80211_local *local =
1570 container_of(work, struct ieee80211_local,
1571 dynamic_ps_disable_work);
1572
1573 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1574 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1575 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1576 }
1577
1578 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1579 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1580 IEEE80211_QUEUE_STOP_REASON_PS,
1581 false);
965bedad
JB		 1582}
1583
1584void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1585{
1586 struct ieee80211_local *local =
1587 container_of(work, struct ieee80211_local,
1588 dynamic_ps_enable_work);
1589 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1590 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1591 unsigned long flags;
1592 int q;
965bedad
JB		 1593
1594 /* can only happen when PS was just disabled anyway */
1595 if (!sdata)
1596 return;
1597
5e34069c
CL		 1598 ifmgd = &sdata->u.mgd;
1599
965bedad
JB		 1600 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1601 return;
1602
09b85568 1603 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1604 /* don't enter PS if TX frames are pending */
1605 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1606 mod_timer(&local->dynamic_ps_timer, jiffies +
1607 msecs_to_jiffies(
1608 local->hw.conf.dynamic_ps_timeout));
1609 return;
1610 }
77b7023a
AN		 1611
1612 /*
1613 * transmission can be stopped by others which leads to
1614 * dynamic_ps_timer expiry. Postpone the ps timer if it
1615 * is not the actual idle state.
1616 */
1617 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1618 for (q = 0; q < local->hw.queues; q++) {
1619 if (local->queue_stop_reasons[q]) {
1620 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1621 flags);
1622 mod_timer(&local->dynamic_ps_timer, jiffies +
1623 msecs_to_jiffies(
1624 local->hw.conf.dynamic_ps_timeout));
1625 return;
1626 }
1627 }
1628 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1629 }
1ddc2867 1630
30686bf7 1631 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1632 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1633 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1634 mod_timer(&local->dynamic_ps_timer, jiffies +
1635 msecs_to_jiffies(
1636 local->hw.conf.dynamic_ps_timeout));
a1598383 1637 } else {
e8306f98
VN		 1638 ieee80211_send_nullfunc(local, sdata, 1);
1639 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1640 ieee80211_flush_queues(local, sdata, false);
e8306f98 1641 }
f3e85b9e
VN		 1642 }
1643
30686bf7
JB		 1644 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1645 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1646 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1647 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1648 local->hw.conf.flags |= IEEE80211_CONF_PS;
1649 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1650 }
965bedad
JB		 1651}
1652
1653void ieee80211_dynamic_ps_timer(unsigned long data)
1654{
1655 struct ieee80211_local *local = (void *) data;
1656
42935eca 1657 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1658}
1659
164eb02d
SW		 1660void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1661{
1662 struct delayed_work *delayed_work =
1663 container_of(work, struct delayed_work, work);
1664 struct ieee80211_sub_if_data *sdata =
1665 container_of(delayed_work, struct ieee80211_sub_if_data,
1666 dfs_cac_timer_work);
d2859df5 1667 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1668
34a3740d
JB		 1669 mutex_lock(&sdata->local->mtx);
1670 if (sdata->wdev.cac_started) {
1671 ieee80211_vif_release_channel(sdata);
1672 cfg80211_cac_event(sdata->dev, &chandef,
1673 NL80211_RADAR_CAC_FINISHED,
1674 GFP_KERNEL);
1675 }
1676 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1677}
1678
02219b3a
JB		 1679static bool
1680__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1681{
1682 struct ieee80211_local *local = sdata->local;
1683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1684 bool ret = false;
02219b3a
JB		 1685 int ac;
1686
1687 if (local->hw.queues < IEEE80211_NUM_ACS)
1688 return false;
1689
1690 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1691 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1692 int non_acm_ac;
1693 unsigned long now = jiffies;
1694
1695 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1696 tx_tspec->admitted_time &&
1697 time_after(now, tx_tspec->time_slice_start + HZ)) {
1698 tx_tspec->consumed_tx_time = 0;
1699 tx_tspec->time_slice_start = now;
1700
1701 if (tx_tspec->downgraded)
1702 tx_tspec->action =
1703 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1704 }
1705
1706 switch (tx_tspec->action) {
1707 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1708 /* take the original parameters */
1709 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 tx_tspec->downgraded = false;
1715 ret = true;
1716 break;
1717 case TX_TSPEC_ACTION_DOWNGRADE:
1718 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1719 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1720 ret = true;
1721 break;
1722 }
1723 /* downgrade next lower non-ACM AC */
1724 for (non_acm_ac = ac + 1;
1725 non_acm_ac < IEEE80211_NUM_ACS;
1726 non_acm_ac++)
1727 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1728 break;
1729 /* The loop will result in using BK even if it requires
1730 * admission control, such configuration makes no sense
1731 * and we have to transmit somehow - the AC selection
1732 * does the same thing.
1733 */
1734 if (drv_conf_tx(local, sdata, ac,
1735 &sdata->tx_conf[non_acm_ac]))
1736 sdata_err(sdata,
1737 "failed to set TX queue parameters for queue %d\n",
1738 ac);
1739 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1740 ret = true;
1741 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1742 tx_tspec->time_slice_start + HZ - now + 1);
1743 break;
1744 case TX_TSPEC_ACTION_NONE:
1745 /* nothing now */
1746 break;
1747 }
1748 }
1749
1750 return ret;
1751}
1752
1753void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1754{
1755 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1756 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1757}
1758
1759static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1760{
1761 struct ieee80211_sub_if_data *sdata;
1762
1763 sdata = container_of(work, struct ieee80211_sub_if_data,
1764 u.mgd.tx_tspec_wk.work);
1765 ieee80211_sta_handle_tspec_ac_params(sdata);
1766}
1767
60f8b39c 1768/* MLME */
7d25745d 1769static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1770 struct ieee80211_sub_if_data *sdata,
4a3cb702 1771 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1772{
f0706e82 1773 struct ieee80211_tx_queue_params params;
4ced3f74 1774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1775 size_t left;
1776 int count;
4a3cb702
JB		 1777 const u8 *pos;
1778 u8 uapsd_queues = 0;
f0706e82 1779
e1b3ec1a 1780 if (!local->ops->conf_tx)
7d25745d 1781 return false;
e1b3ec1a 1782
32c5057b 1783 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1784 return false;
3434fbd3
JB		 1785
1786 if (!wmm_param)
7d25745d 1787 return false;
3434fbd3 1788
f0706e82 1789 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1790 return false;
ab13315a
KV		 1791
1792 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1793 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1794
f0706e82 1795 count = wmm_param[6] & 0x0f;
46900298 1796 if (count == ifmgd->wmm_last_param_set)
7d25745d 1797 return false;
46900298 1798 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1799
1800 pos = wmm_param + 8;
1801 left = wmm_param_len - 8;
1802
1803 memset(&params, 0, sizeof(params));
1804
00e96dec 1805 sdata->wmm_acm = 0;
f0706e82
JB		 1806 for (; left >= 4; left -= 4, pos += 4) {
1807 int aci = (pos[0] >> 5) & 0x03;
1808 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1809 bool uapsd = false;
f0706e82
JB		 1810 int queue;
1811
1812 switch (aci) {
0eeb59fe 1813 case 1: /* AC_BK */
e100bb64 1814 queue = 3;
988c0f72 1815 if (acm)
00e96dec 1816 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1817 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1818 uapsd = true;
f0706e82 1819 break;
0eeb59fe 1820 case 2: /* AC_VI */
e100bb64 1821 queue = 1;
988c0f72 1822 if (acm)
00e96dec 1823 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1824 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1825 uapsd = true;
f0706e82 1826 break;
0eeb59fe 1827 case 3: /* AC_VO */
e100bb64 1828 queue = 0;
988c0f72 1829 if (acm)
00e96dec 1830 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1831 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1832 uapsd = true;
f0706e82 1833 break;
0eeb59fe 1834 case 0: /* AC_BE */
f0706e82 1835 default:
e100bb64 1836 queue = 2;
988c0f72 1837 if (acm)
00e96dec 1838 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1839 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1840 uapsd = true;
f0706e82
JB		 1841 break;
1842 }
1843
1844 params.aifs = pos[0] & 0x0f;
1845 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1846 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1847 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1848 params.acm = acm;
ab13315a
KV		 1849 params.uapsd = uapsd;
1850
bdcbd8e0 1851 mlme_dbg(sdata,
02219b3a 1852 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1853 queue, aci, acm,
1854 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1855 params.txop, params.uapsd,
1856 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1857 sdata->tx_conf[queue] = params;
02219b3a
JB		 1858 if (!ifmgd->tx_tspec[queue].downgraded &&
1859 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1860 sdata_err(sdata,
1861 "failed to set TX queue parameters for queue %d\n",
1862 queue);
f0706e82 1863 }
e1b3ec1a
SG		 1864
1865 /* enable WMM or activate new settings */
4ced3f74 1866 sdata->vif.bss_conf.qos = true;
7d25745d 1867 return true;
f0706e82
JB		 1868}
1869
925e64c3
SG		 1870static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1871{
1872 lockdep_assert_held(&sdata->local->mtx);
1873
392b9ffb 1874 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1875 ieee80211_run_deferred_scan(sdata->local);
1876}
1877
1878static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1879{
1880 mutex_lock(&sdata->local->mtx);
1881 __ieee80211_stop_poll(sdata);
1882 mutex_unlock(&sdata->local->mtx);
1883}
1884
7a5158ef
JB		 1885static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1886 u16 capab, bool erp_valid, u8 erp)
5628221c 1887{
bda3933a 1888 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1889 u32 changed = 0;
7a5158ef
JB		 1890 bool use_protection;
1891 bool use_short_preamble;
1892 bool use_short_slot;
1893
1894 if (erp_valid) {
1895 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1896 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1897 } else {
1898 use_protection = false;
1899 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1900 }
1901
1902 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1903 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1904 use_short_slot = true;
5628221c 1905
471b3efd 1906 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1907 bss_conf->use_cts_prot = use_protection;
1908 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1909 }
7e9ed188 1910
d43c7b37 1911 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1912 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1913 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1914 }
d9430a32 1915
7a5158ef 1916 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1917 bss_conf->use_short_slot = use_short_slot;
1918 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1919 }
1920
1921 return changed;
1922}
1923
f698d856 1924static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1925 struct cfg80211_bss *cbss,
ae5eb026 1926 u32 bss_info_changed)
f0706e82 1927{
0c1ad2ca 1928 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1929 struct ieee80211_local *local = sdata->local;
68542962 1930 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1931
ae5eb026 1932 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1933 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1934 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1935
7ccc8bd7 1936 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1937 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1938
0c1ad2ca
JB		 1939 sdata->u.mgd.associated = cbss;
1940 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1941
17e4ec14
JM		 1942 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1943
488dd7b5 1944 if (sdata->vif.p2p) {
9caf0364 1945 const struct cfg80211_bss_ies *ies;
488dd7b5 1946
9caf0364
JB		 1947 rcu_read_lock();
1948 ies = rcu_dereference(cbss->ies);
1949 if (ies) {
9caf0364
JB		 1950 int ret;
1951
1952 ret = cfg80211_get_p2p_attr(
1953 ies->data, ies->len,
1954 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1955 (u8 *) &bss_conf->p2p_noa_attr,
1956 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1957 if (ret >= 2) {
67baf663
JD		 1958 sdata->u.mgd.p2p_noa_index =
1959 bss_conf->p2p_noa_attr.index;
9caf0364 1960 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1961 }
488dd7b5 1962 }
9caf0364 1963 rcu_read_unlock();
488dd7b5
JB		 1964 }
1965
b291ba11 1966 /* just to be sure */
925e64c3 1967 ieee80211_stop_poll(sdata);
b291ba11 1968
9ac19a90 1969 ieee80211_led_assoc(local, 1);
9306102e 1970
989c6505 1971 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1972 /*
1973 * If the AP is buggy we may get here with no DTIM period
1974 * known, so assume it's 1 which is the only safe assumption
1975 * in that case, although if the TIM IE is broken powersave
1976 * probably just won't work at all.
1977 */
1978 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1979 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1980 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1981 } else {
817cee76 1982 bss_conf->beacon_rate = NULL;
e5b900d2 1983 bss_conf->dtim_period = 0;
826262c3 1984 }
e5b900d2 1985
68542962 1986 bss_conf->assoc = 1;
9cef8737 1987
a97c13c3 1988 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1989 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1990 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1991 bss_info_changed |= BSS_CHANGED_CQM;
1992
68542962 1993 /* Enable ARP filtering */
0f19b41e 1994 if (bss_conf->arp_addr_cnt)
68542962 1995 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1996
ae5eb026 1997 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1998
056508dc
JB		 1999 mutex_lock(&local->iflist_mtx);
2000 ieee80211_recalc_ps(local, -1);
2001 mutex_unlock(&local->iflist_mtx);
e0cb686f 2002
04ecd257 2003 ieee80211_recalc_smps(sdata);
ab095877
EP		 2004 ieee80211_recalc_ps_vif(sdata);
2005
9ac19a90 2006 netif_carrier_on(sdata->dev);
f0706e82
JB		 2007}
2008
e69e95db 2009static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2010 u16 stype, u16 reason, bool tx,
2011 u8 *frame_buf)
aa458d17 2012{
46900298 2013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2014 struct ieee80211_local *local = sdata->local;
3cc5240b 2015 u32 changed = 0;
aa458d17 2016
8d61ffa5 2017 sdata_assert_lock(sdata);
77fdaa12 2018
37ad3888
JB		 2019 if (WARN_ON_ONCE(tx && !frame_buf))
2020 return;
2021
b291ba11
JB		 2022 if (WARN_ON(!ifmgd->associated))
2023 return;
2024
79543d8e
DS		 2025 ieee80211_stop_poll(sdata);
2026
77fdaa12 2027 ifmgd->associated = NULL;
aa458d17
TW		 2028 netif_carrier_off(sdata->dev);
2029
88bc40e8
EP		 2030 /*
2031 * if we want to get out of ps before disassoc (why?) we have
2032 * to do it before sending disassoc, as otherwise the null-packet
2033 * won't be valid.
2034 */
2035 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2036 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2037 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2038 }
2039 local->ps_sdata = NULL;
2040
ab095877
EP		 2041 /* disable per-vif ps */
2042 ieee80211_recalc_ps_vif(sdata);
2043
14f2ae83
EG		 2044 /* make sure ongoing transmission finishes */
2045 synchronize_net();
2046
3b24f4c6
EG		 2047 /*
2048 * drop any frame before deauth/disassoc, this can be data or
2049 * management frame. Since we are disconnecting, we should not
2050 * insist sending these frames which can take time and delay
2051 * the disconnection and possible the roaming.
2052 */
f823981e 2053 if (tx)
3b24f4c6 2054 ieee80211_flush_queues(local, sdata, true);
f823981e 2055
37ad3888
JB		 2056 /* deauthenticate/disassociate now */
2057 if (tx || frame_buf)
88a9e31c
EP		 2058 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2059 reason, tx, frame_buf);
37ad3888 2060
3b24f4c6 2061 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2062 if (tx)
3b24f4c6 2063 ieee80211_flush_queues(local, sdata, false);
37ad3888 2064
88a9e31c 2065 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2066 eth_zero_addr(ifmgd->bssid);
88a9e31c 2067
37ad3888 2068 /* remove AP and TDLS peers */
d34ba216 2069 sta_info_flush(sdata);
37ad3888
JB		 2070
2071 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2072 changed |= ieee80211_reset_erp_info(sdata);
2073
f5e5bf25 2074 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2075 changed |= BSS_CHANGED_ASSOC;
2076 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2077
67baf663
JD		 2078 ifmgd->p2p_noa_index = -1;
2079 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2080 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2081
dd5ecfea 2082 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2083 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2084 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2085 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2086 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2087 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2088
1ea6f9c0 2089 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2090
520eb820
KV		 2091 del_timer_sync(&local->dynamic_ps_timer);
2092 cancel_work_sync(&local->dynamic_ps_enable_work);
2093
68542962 2094 /* Disable ARP filtering */
0f19b41e 2095 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2096 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2097
3abead59
JB		 2098 sdata->vif.bss_conf.qos = false;
2099 changed |= BSS_CHANGED_QOS;
2100
0aaffa9b
JB		 2101 /* The BSSID (not really interesting) and HT changed */
2102 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2103 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2104
3abead59
JB		 2105 /* disassociated - set to defaults now */
2106 ieee80211_set_wmm_default(sdata, false);
2107
b9dcf712
JB		 2108 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2109 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2110 del_timer_sync(&sdata->u.mgd.timer);
2111 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2112
826262c3 2113 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2114 sdata->vif.bss_conf.beacon_rate = NULL;
2115
989c6505 2116 ifmgd->have_beacon = false;
826262c3 2117
028e8da0 2118 ifmgd->flags = 0;
34a3740d 2119 mutex_lock(&local->mtx);
028e8da0 2120 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2121
2122 sdata->vif.csa_active = false;
0c21e632 2123 ifmgd->csa_waiting_bcn = false;
f84eaa10 2124 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2125 if (sdata->csa_block_tx) {
2126 ieee80211_wake_vif_queues(local, sdata,
2127 IEEE80211_QUEUE_STOP_REASON_CSA);
2128 sdata->csa_block_tx = false;
2129 }
34a3740d 2130 mutex_unlock(&local->mtx);
2475b1cc 2131
02219b3a
JB		 2132 /* existing TX TSPEC sessions no longer exist */
2133 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2134 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2135
2475b1cc 2136 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2137}
f0706e82 2138
3cf335d5
KV		 2139void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2140 struct ieee80211_hdr *hdr)
2141{
2142 /*
2143 * We can postpone the mgd.timer whenever receiving unicast frames
2144 * from AP because we know that the connection is working both ways
2145 * at that time. But multicast frames (and hence also beacons) must
2146 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2147 * data idle periods for sending the periodic probe request to the
2148 * AP we're connected to.
3cf335d5 2149 */
b291ba11
JB		 2150 if (is_multicast_ether_addr(hdr->addr1))
2151 return;
2152
be099e82 2153 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2154}
f0706e82 2155
4e5ff376
FF		 2156static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2157{
2158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2159 struct ieee80211_local *local = sdata->local;
4e5ff376 2160
133d40f9 2161 mutex_lock(&local->mtx);
392b9ffb
SG		 2162 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2163 goto out;
4e5ff376 2164
925e64c3 2165 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2166
2167 mutex_lock(&local->iflist_mtx);
2168 ieee80211_recalc_ps(local, -1);
2169 mutex_unlock(&local->iflist_mtx);
4e5ff376 2170
30686bf7 2171 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2172 goto out;
4e5ff376
FF		 2173
2174 /*
2175 * We've received a probe response, but are not sure whether
2176 * we have or will be receiving any beacons or data, so let's
2177 * schedule the timers again, just in case.
2178 */
2179 ieee80211_sta_reset_beacon_monitor(sdata);
2180
2181 mod_timer(&ifmgd->conn_mon_timer,
2182 round_jiffies_up(jiffies +
2183 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2184out:
133d40f9 2185 mutex_unlock(&local->mtx);
4e5ff376
FF		 2186}
2187
02219b3a
JB		 2188static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2189 struct ieee80211_hdr *hdr,
2190 u16 tx_time)
2191{
2192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2193 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2194 int ac = ieee80211_ac_from_tid(tid);
2195 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2196 unsigned long now = jiffies;
2197
2198 if (likely(!tx_tspec->admitted_time))
2199 return;
2200
2201 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2202 tx_tspec->consumed_tx_time = 0;
2203 tx_tspec->time_slice_start = now;
2204
2205 if (tx_tspec->downgraded) {
2206 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2207 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2208 }
2209 }
2210
2211 if (tx_tspec->downgraded)
2212 return;
2213
2214 tx_tspec->consumed_tx_time += tx_time;
2215
2216 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2217 tx_tspec->downgraded = true;
2218 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2219 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2220 }
2221}
2222
4e5ff376 2223void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2224 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2225{
02219b3a
JB		 2226 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2227
75706d0e 2228 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2229 return;
2230
4e5ff376
FF		 2231 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2232 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2233 if (ack)
cab1c7fd 2234 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2235 else
2236 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2237 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2238 return;
4e5ff376 2239 }
cab1c7fd
WD		 2240
2241 if (ack)
2242 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2243}
2244
a43abf29
ML		 2245static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2246{
2247 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2248 const u8 *ssid;
f01a067d 2249 u8 *dst = ifmgd->associated->bssid;
180205bd 2250 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2251
2252 /*
2253 * Try sending broadcast probe requests for the last three
2254 * probe requests after the first ones failed since some
2255 * buggy APs only support broadcast probe requests.
2256 */
2257 if (ifmgd->probe_send_count >= unicast_limit)
2258 dst = NULL;
a43abf29 2259
4e5ff376
FF		 2260 /*
2261 * When the hardware reports an accurate Tx ACK status, it's
2262 * better to send a nullfunc frame instead of a probe request,
2263 * as it will kick us off the AP quickly if we aren't associated
2264 * anymore. The timeout will be reset if the frame is ACKed by
2265 * the AP.
2266 */
992e68bf
SD		 2267 ifmgd->probe_send_count++;
2268
30686bf7 2269 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2270 ifmgd->nullfunc_failed = false;
4e5ff376 2271 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2272 } else {
88c868c4
SG		 2273 int ssid_len;
2274
9caf0364 2275 rcu_read_lock();
4e5ff376 2276 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2277 if (WARN_ON_ONCE(ssid == NULL))
2278 ssid_len = 0;
2279 else
2280 ssid_len = ssid[1];
2281
a73f8e21 2282 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2283 ssid + 2, ssid_len, NULL,
1672c0e3 2284 0, (u32) -1, true, 0,
55de908a 2285 ifmgd->associated->channel, false);
9caf0364 2286 rcu_read_unlock();
4e5ff376 2287 }
a43abf29 2288
180205bd 2289 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2290 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2291}
2292
b291ba11
JB		 2293static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2294 bool beacon)
04de8381 2295{
04de8381 2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2297 bool already = false;
34bfc411 2298
9607e6b6 2299 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2300 return;
2301
8d61ffa5 2302 sdata_lock(sdata);
77fdaa12
JB		 2303
2304 if (!ifmgd->associated)
2305 goto out;
2306
133d40f9
SG		 2307 mutex_lock(&sdata->local->mtx);
2308
2309 if (sdata->local->tmp_channel || sdata->local->scanning) {
2310 mutex_unlock(&sdata->local->mtx);
2311 goto out;
2312 }
2313
a13fbe54 2314 if (beacon) {
bdcbd8e0 2315 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2316 "detected beacon loss from AP (missed %d beacons) - probing\n",
2317 beacon_loss_count);
bdcbd8e0 2318
98f03342 2319 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2320 }
04de8381 2321
b291ba11
JB		 2322 /*
2323 * The driver/our work has already reported this event or the
2324 * connection monitoring has kicked in and we have already sent
2325 * a probe request. Or maybe the AP died and the driver keeps
2326 * reporting until we disassociate...
2327 *
2328 * In either case we have to ignore the current call to this
2329 * function (except for setting the correct probe reason bit)
2330 * because otherwise we would reset the timer every time and
2331 * never check whether we received a probe response!
2332 */
392b9ffb 2333 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2334 already = true;
2335
12b5f34d
EP		 2336 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2337
133d40f9
SG		 2338 mutex_unlock(&sdata->local->mtx);
2339
b291ba11
JB		 2340 if (already)
2341 goto out;
2342
4e751843
JB		 2343 mutex_lock(&sdata->local->iflist_mtx);
2344 ieee80211_recalc_ps(sdata->local, -1);
2345 mutex_unlock(&sdata->local->iflist_mtx);
2346
a43abf29
ML		 2347 ifmgd->probe_send_count = 0;
2348 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2349 out:
8d61ffa5 2350 sdata_unlock(sdata);
04de8381
KV		 2351}
2352
a619a4c0
JO		 2353struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2354 struct ieee80211_vif *vif)
2355{
2356 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2358 struct cfg80211_bss *cbss;
a619a4c0
JO		 2359 struct sk_buff *skb;
2360 const u8 *ssid;
88c868c4 2361 int ssid_len;
a619a4c0
JO		 2362
2363 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2364 return NULL;
2365
8d61ffa5 2366 sdata_assert_lock(sdata);
a619a4c0 2367
d9b3b28b
EP		 2368 if (ifmgd->associated)
2369 cbss = ifmgd->associated;
2370 else if (ifmgd->auth_data)
2371 cbss = ifmgd->auth_data->bss;
2372 else if (ifmgd->assoc_data)
2373 cbss = ifmgd->assoc_data->bss;
2374 else
a619a4c0
JO		 2375 return NULL;
2376
9caf0364 2377 rcu_read_lock();
d9b3b28b 2378 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2379 if (WARN_ON_ONCE(ssid == NULL))
2380 ssid_len = 0;
2381 else
2382 ssid_len = ssid[1];
2383
a344d677 2384 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2385 (u32) -1, cbss->channel,
6b77863b 2386 ssid + 2, ssid_len,
85a237fe 2387 NULL, 0, true);
9caf0364 2388 rcu_read_unlock();
a619a4c0
JO		 2389
2390 return skb;
2391}
2392EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2393
a90faa9d
EG		 2394static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2395 const u8 *buf, size_t len, bool tx,
2396 u16 reason)
2397{
2398 struct ieee80211_event event = {
2399 .type = MLME_EVENT,
2400 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2401 .u.mlme.reason = reason,
2402 };
2403
2404 if (tx)
2405 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2406 else
2407 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2408
2409 drv_event_callback(sdata->local, sdata, &event);
2410}
2411
eef9e54c 2412static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2413{
59af6928 2414 struct ieee80211_local *local = sdata->local;
1e4dcd01 2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2416 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2417
8d61ffa5 2418 sdata_lock(sdata);
1e4dcd01 2419 if (!ifmgd->associated) {
8d61ffa5 2420 sdata_unlock(sdata);
1e4dcd01
JO		 2421 return;
2422 }
2423
37ad3888
JB		 2424 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2425 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2426 true, frame_buf);
59af6928 2427 mutex_lock(&local->mtx);
7578d575 2428 sdata->vif.csa_active = false;
0c21e632 2429 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2430 if (sdata->csa_block_tx) {
2431 ieee80211_wake_vif_queues(local, sdata,
2432 IEEE80211_QUEUE_STOP_REASON_CSA);
2433 sdata->csa_block_tx = false;
2434 }
59af6928 2435 mutex_unlock(&local->mtx);
7da7cc1d 2436
a90faa9d
EG		 2437 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2438 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2439
8d61ffa5 2440 sdata_unlock(sdata);
1e4dcd01
JO		 2441}
2442
cc74c0c7 2443static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2444{
2445 struct ieee80211_sub_if_data *sdata =
2446 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2447 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2449 struct sta_info *sta;
2450
2451 if (ifmgd->associated) {
30fa9047 2452 rcu_read_lock();
a85e1d55
PS		 2453 sta = sta_info_get(sdata, ifmgd->bssid);
2454 if (sta)
2455 sta->beacon_loss_count++;
30fa9047 2456 rcu_read_unlock();
a85e1d55 2457 }
b291ba11 2458
682bd38b 2459 if (ifmgd->connection_loss) {
882a7c69
JB		 2460 sdata_info(sdata, "Connection to AP %pM lost\n",
2461 ifmgd->bssid);
eef9e54c 2462 __ieee80211_disconnect(sdata);
882a7c69 2463 } else {
1e4dcd01 2464 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2465 }
2466}
2467
2468static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2469{
2470 struct ieee80211_sub_if_data *sdata =
2471 container_of(work, struct ieee80211_sub_if_data,
2472 u.mgd.csa_connection_drop_work);
2473
eef9e54c 2474 __ieee80211_disconnect(sdata);
b291ba11
JB		 2475}
2476
04de8381
KV		 2477void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2478{
2479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2480 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2481
b5878a2d
JB		 2482 trace_api_beacon_loss(sdata);
2483
682bd38b 2484 sdata->u.mgd.connection_loss = false;
1e4dcd01 2485 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2486}
2487EXPORT_SYMBOL(ieee80211_beacon_loss);
2488
1e4dcd01
JO		 2489void ieee80211_connection_loss(struct ieee80211_vif *vif)
2490{
2491 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2492 struct ieee80211_hw *hw = &sdata->local->hw;
2493
b5878a2d
JB		 2494 trace_api_connection_loss(sdata);
2495
682bd38b 2496 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2497 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2498}
2499EXPORT_SYMBOL(ieee80211_connection_loss);
2500
2501
66e67e41
JB		 2502static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2503 bool assoc)
2504{
2505 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2506
8d61ffa5 2507 sdata_assert_lock(sdata);
66e67e41 2508
66e67e41 2509 if (!assoc) {
c1e140bf
EG		 2510 /*
2511 * we are not authenticated yet, the only timer that could be
2512 * running is the timeout for the authentication response which
2513 * which is not relevant anymore.
2514 */
2515 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2516 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2517
c84a67a2 2518 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2519 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2520 sdata->u.mgd.flags = 0;
34a3740d 2521 mutex_lock(&sdata->local->mtx);
55de908a 2522 ieee80211_vif_release_channel(sdata);
34a3740d 2523 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2524 }
2525
5b112d3d 2526 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2527 kfree(auth_data);
2528 sdata->u.mgd.auth_data = NULL;
2529}
2530
c9c99f89
JB		 2531static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2532 bool assoc)
2533{
2534 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2535
2536 sdata_assert_lock(sdata);
2537
2538 if (!assoc) {
2539 /*
2540 * we are not associated yet, the only timer that could be
2541 * running is the timeout for the association response which
2542 * which is not relevant anymore.
2543 */
2544 del_timer_sync(&sdata->u.mgd.timer);
2545 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2546
2547 eth_zero_addr(sdata->u.mgd.bssid);
2548 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2549 sdata->u.mgd.flags = 0;
322cd406 2550 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2551 mutex_lock(&sdata->local->mtx);
2552 ieee80211_vif_release_channel(sdata);
2553 mutex_unlock(&sdata->local->mtx);
2554 }
2555
2556 kfree(assoc_data);
2557 sdata->u.mgd.assoc_data = NULL;
2558}
2559
66e67e41
JB		 2560static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2561 struct ieee80211_mgmt *mgmt, size_t len)
2562{
1672c0e3 2563 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2564 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2565 u8 *pos;
2566 struct ieee802_11_elems elems;
1672c0e3 2567 u32 tx_flags = 0;
66e67e41
JB		 2568
2569 pos = mgmt->u.auth.variable;
b2e506bf 2570 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2571 if (!elems.challenge)
2572 return;
2573 auth_data->expected_transaction = 4;
a1845fc7 2574 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2575 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2576 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2577 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2578 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2579 elems.challenge - 2, elems.challenge_len + 2,
2580 auth_data->bss->bssid, auth_data->bss->bssid,
2581 auth_data->key, auth_data->key_len,
1672c0e3 2582 auth_data->key_idx, tx_flags);
66e67e41
JB		 2583}
2584
8d61ffa5
JB		 2585static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2586 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2587{
2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2589 u8 bssid[ETH_ALEN];
2590 u16 auth_alg, auth_transaction, status_code;
2591 struct sta_info *sta;
a9409093
EG		 2592 struct ieee80211_event event = {
2593 .type = MLME_EVENT,
2594 .u.mlme.data = AUTH_EVENT,
2595 };
66e67e41 2596
8d61ffa5 2597 sdata_assert_lock(sdata);
66e67e41
JB		 2598
2599 if (len < 24 + 6)
8d61ffa5 2600 return;
66e67e41
JB		 2601
2602 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2603 return;
66e67e41
JB		 2604
2605 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2606
b203ca39 2607 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2608 return;
66e67e41
JB		 2609
2610 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2611 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2612 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2613
2614 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2615 auth_transaction != ifmgd->auth_data->expected_transaction) {
2616 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2617 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2618 auth_transaction,
2619 ifmgd->auth_data->expected_transaction);
8d61ffa5 2620 return;
0f4126e8 2621 }
66e67e41
JB		 2622
2623 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2624 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2625 mgmt->sa, status_code);
dac211ec 2626 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2627 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2628 event.u.mlme.status = MLME_DENIED;
2629 event.u.mlme.reason = status_code;
2630 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2631 return;
66e67e41
JB		 2632 }
2633
2634 switch (ifmgd->auth_data->algorithm) {
2635 case WLAN_AUTH_OPEN:
2636 case WLAN_AUTH_LEAP:
2637 case WLAN_AUTH_FT:
6b8ece3a 2638 case WLAN_AUTH_SAE:
66e67e41
JB		 2639 break;
2640 case WLAN_AUTH_SHARED_KEY:
2641 if (ifmgd->auth_data->expected_transaction != 4) {
2642 ieee80211_auth_challenge(sdata, mgmt, len);
2643 /* need another frame */
8d61ffa5 2644 return;
66e67e41
JB		 2645 }
2646 break;
2647 default:
2648 WARN_ONCE(1, "invalid auth alg %d",
2649 ifmgd->auth_data->algorithm);
8d61ffa5 2650 return;
66e67e41
JB		 2651 }
2652
a9409093
EG		 2653 event.u.mlme.status = MLME_SUCCESS;
2654 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2655 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2656 ifmgd->auth_data->done = true;
2657 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2658 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2659 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2660
6b8ece3a
JM		 2661 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2662 ifmgd->auth_data->expected_transaction != 2) {
2663 /*
2664 * Report auth frame to user space for processing since another
2665 * round of Authentication frames is still needed.
2666 */
6ff57cf8 2667 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2668 return;
6b8ece3a
JM		 2669 }
2670
66e67e41
JB		 2671 /* move station state to auth */
2672 mutex_lock(&sdata->local->sta_mtx);
2673 sta = sta_info_get(sdata, bssid);
2674 if (!sta) {
2675 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2676 goto out_err;
2677 }
2678 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2679 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2680 goto out_err;
2681 }
2682 mutex_unlock(&sdata->local->sta_mtx);
2683
6ff57cf8 2684 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2685 return;
66e67e41
JB		 2686 out_err:
2687 mutex_unlock(&sdata->local->sta_mtx);
2688 /* ignore frame -- wait for timeout */
66e67e41
JB		 2689}
2690
dfa1ad29
CO		 2691#define case_WLAN(type) \
2692 case WLAN_REASON_##type: return #type
2693
2694static const char *ieee80211_get_reason_code_string(u16 reason_code)
2695{
2696 switch (reason_code) {
2697 case_WLAN(UNSPECIFIED);
2698 case_WLAN(PREV_AUTH_NOT_VALID);
2699 case_WLAN(DEAUTH_LEAVING);
2700 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2701 case_WLAN(DISASSOC_AP_BUSY);
2702 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2703 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2704 case_WLAN(DISASSOC_STA_HAS_LEFT);
2705 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2706 case_WLAN(DISASSOC_BAD_POWER);
2707 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2708 case_WLAN(INVALID_IE);
2709 case_WLAN(MIC_FAILURE);
2710 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2711 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2712 case_WLAN(IE_DIFFERENT);
2713 case_WLAN(INVALID_GROUP_CIPHER);
2714 case_WLAN(INVALID_PAIRWISE_CIPHER);
2715 case_WLAN(INVALID_AKMP);
2716 case_WLAN(UNSUPP_RSN_VERSION);
2717 case_WLAN(INVALID_RSN_IE_CAP);
2718 case_WLAN(IEEE8021X_FAILED);
2719 case_WLAN(CIPHER_SUITE_REJECTED);
2720 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2721 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2722 case_WLAN(DISASSOC_LOW_ACK);
2723 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2724 case_WLAN(QSTA_LEAVE_QBSS);
2725 case_WLAN(QSTA_NOT_USE);
2726 case_WLAN(QSTA_REQUIRE_SETUP);
2727 case_WLAN(QSTA_TIMEOUT);
2728 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2729 case_WLAN(MESH_PEER_CANCELED);
2730 case_WLAN(MESH_MAX_PEERS);
2731 case_WLAN(MESH_CONFIG);
2732 case_WLAN(MESH_CLOSE);
2733 case_WLAN(MESH_MAX_RETRIES);
2734 case_WLAN(MESH_CONFIRM_TIMEOUT);
2735 case_WLAN(MESH_INVALID_GTK);
2736 case_WLAN(MESH_INCONSISTENT_PARAM);
2737 case_WLAN(MESH_INVALID_SECURITY);
2738 case_WLAN(MESH_PATH_ERROR);
2739 case_WLAN(MESH_PATH_NOFORWARD);
2740 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2741 case_WLAN(MAC_EXISTS_IN_MBSS);
2742 case_WLAN(MESH_CHAN_REGULATORY);
2743 case_WLAN(MESH_CHAN);
2744 default: return "<unknown>";
2745 }
2746}
66e67e41 2747
8d61ffa5
JB		 2748static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2749 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2750{
46900298 2751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2752 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2753
8d61ffa5 2754 sdata_assert_lock(sdata);
66e67e41 2755
f4ea83dd 2756 if (len < 24 + 2)
8d61ffa5 2757 return;
f0706e82 2758
c9c99f89
JB		 2759 if (ifmgd->associated &&
2760 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2761 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2762
c9c99f89
JB		 2763 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2764 bssid, reason_code,
2765 ieee80211_get_reason_code_string(reason_code));
f0706e82 2766
c9c99f89 2767 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2768
c9c99f89
JB		 2769 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2770 reason_code);
2771 return;
2772 }
77fdaa12 2773
c9c99f89
JB		 2774 if (ifmgd->assoc_data &&
2775 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2776 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2777
c9c99f89
JB		 2778 sdata_info(sdata,
2779 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2780 bssid, reason_code,
2781 ieee80211_get_reason_code_string(reason_code));
2782
2783 ieee80211_destroy_assoc_data(sdata, false);
2784
2785 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2786 return;
2787 }
f0706e82
JB		 2788}
2789
2790
8d61ffa5
JB		 2791static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2792 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2793{
46900298 2794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2795 u16 reason_code;
2796
8d61ffa5 2797 sdata_assert_lock(sdata);
77fdaa12 2798
66e67e41 2799 if (len < 24 + 2)
8d61ffa5 2800 return;
77fdaa12 2801
66e67e41 2802 if (!ifmgd->associated ||
b203ca39 2803 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2804 return;
f0706e82
JB		 2805
2806 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2807
bdcbd8e0
JB		 2808 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2809 mgmt->sa, reason_code);
f0706e82 2810
37ad3888
JB		 2811 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2812
a90faa9d 2813 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2814}
2815
c74d084f
CL		 2816static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2817 u8 *supp_rates, unsigned int supp_rates_len,
2818 u32 *rates, u32 *basic_rates,
2819 bool *have_higher_than_11mbit,
2103dec1
SW		 2820 int *min_rate, int *min_rate_index,
2821 int shift, u32 rate_flags)
c74d084f
CL		 2822{
2823 int i, j;
2824
2825 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2826 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2827 bool is_basic = !!(supp_rates[i] & 0x80);
2828
2103dec1 2829 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2830 *have_higher_than_11mbit = true;
2831
2832 /*
2833 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2834 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2835 *
2836 * Note: Even through the membership selector and the basic
2837 * rate flag share the same bit, they are not exactly
2838 * the same.
2839 */
2840 if (!!(supp_rates[i] & 0x80) &&
2841 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2842 continue;
2843
2844 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2845 struct ieee80211_rate *br;
2846 int brate;
2847
2848 br = &sband->bitrates[j];
2849 if ((rate_flags & br->flags) != rate_flags)
2850 continue;
2851
2852 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2853 if (brate == rate) {
c74d084f
CL		 2854 *rates |= BIT(j);
2855 if (is_basic)
2856 *basic_rates |= BIT(j);
2103dec1
SW		 2857 if ((rate * 5) < *min_rate) {
2858 *min_rate = rate * 5;
c74d084f
CL		 2859 *min_rate_index = j;
2860 }
2861 break;
2862 }
2863 }
2864 }
2865}
f0706e82 2866
66e67e41
JB		 2867static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2868 struct cfg80211_bss *cbss,
af6b6374 2869 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2870{
46900298 2871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2872 struct ieee80211_local *local = sdata->local;
8318d78a 2873 struct ieee80211_supported_band *sband;
f0706e82 2874 struct sta_info *sta;
af6b6374 2875 u8 *pos;
af6b6374 2876 u16 capab_info, aid;
f0706e82 2877 struct ieee802_11_elems elems;
bda3933a 2878 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2879 const struct cfg80211_bss_ies *bss_ies = NULL;
2880 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2881 u32 changed = 0;
c74d084f 2882 int err;
35d865af 2883 bool ret;
f0706e82 2884
af6b6374 2885 /* AssocResp and ReassocResp have identical structure */
f0706e82 2886
f0706e82 2887 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2888 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2889
1dd84aa2 2890 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2891 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2892 aid);
1dd84aa2
JB		 2893 aid &= ~(BIT(15) | BIT(14));
2894
05cb9108
JB		 2895 ifmgd->broken_ap = false;
2896
2897 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2898 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2899 aid);
05cb9108
JB		 2900 aid = 0;
2901 ifmgd->broken_ap = true;
2902 }
2903
af6b6374 2904 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2905 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2906
f0706e82 2907 if (!elems.supp_rates) {
bdcbd8e0 2908 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2909 return false;
f0706e82
JB		 2910 }
2911
46900298 2912 ifmgd->aid = aid;
9041c1fa
AN		 2913 ifmgd->tdls_chan_switch_prohibited =
2914 elems.ext_capab && elems.ext_capab_len >= 5 &&
2915 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2916
35d865af
JB		 2917 /*
2918 * Some APs are erroneously not including some information in their
2919 * (re)association response frames. Try to recover by using the data
2920 * from the beacon or probe response. This seems to afflict mobile
2921 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2922 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2923 */
2924 if ((assoc_data->wmm && !elems.wmm_param) ||
2925 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2926 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2927 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2928 (!elems.vht_cap_elem || !elems.vht_operation))) {
2929 const struct cfg80211_bss_ies *ies;
2930 struct ieee802_11_elems bss_elems;
2931
2932 rcu_read_lock();
2933 ies = rcu_dereference(cbss->ies);
2934 if (ies)
2935 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2936 GFP_ATOMIC);
2937 rcu_read_unlock();
2938 if (!bss_ies)
2939 return false;
2940
2941 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2942 false, &bss_elems);
2943 if (assoc_data->wmm &&
2944 !elems.wmm_param && bss_elems.wmm_param) {
2945 elems.wmm_param = bss_elems.wmm_param;
2946 sdata_info(sdata,
2947 "AP bug: WMM param missing from AssocResp\n");
2948 }
2949
2950 /*
2951 * Also check if we requested HT/VHT, otherwise the AP doesn't
2952 * have to include the IEs in the (re)association response.
2953 */
2954 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2956 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2957 sdata_info(sdata,
2958 "AP bug: HT capability missing from AssocResp\n");
2959 }
2960 if (!elems.ht_operation && bss_elems.ht_operation &&
2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2962 elems.ht_operation = bss_elems.ht_operation;
2963 sdata_info(sdata,
2964 "AP bug: HT operation missing from AssocResp\n");
2965 }
2966 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2967 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2968 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2969 sdata_info(sdata,
2970 "AP bug: VHT capa missing from AssocResp\n");
2971 }
2972 if (!elems.vht_operation && bss_elems.vht_operation &&
2973 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2974 elems.vht_operation = bss_elems.vht_operation;
2975 sdata_info(sdata,
2976 "AP bug: VHT operation missing from AssocResp\n");
2977 }
2978 }
2979
30eb1dc2
JB		 2980 /*
2981 * We previously checked these in the beacon/probe response, so
2982 * they should be present here. This is just a safety net.
2983 */
2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2985 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2986 sdata_info(sdata,
35d865af
JB		 2987 "HT AP is missing WMM params or HT capability/operation\n");
2988 ret = false;
2989 goto out;
30eb1dc2
JB		 2990 }
2991
2992 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2993 (!elems.vht_cap_elem || !elems.vht_operation)) {
2994 sdata_info(sdata,
35d865af
JB		 2995 "VHT AP is missing VHT capability/operation\n");
2996 ret = false;
2997 goto out;
30eb1dc2
JB		 2998 }
2999
2a33bee2
GE		 3000 mutex_lock(&sdata->local->sta_mtx);
3001 /*
3002 * station info was already allocated and inserted before
3003 * the association and should be available to us
3004 */
7852e361 3005 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 3006 if (WARN_ON(!sta)) {
3007 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3008 ret = false;
3009 goto out;
77fdaa12 3010 }
05e5e883 3011
55de908a 3012 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 3013
30eb1dc2 3014 /* Set up internal HT/VHT capabilities */
a8243b72 3015 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 3016 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3017 elems.ht_cap_elem, sta);
64f68e5d 3018
818255ea
MP		 3019 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3020 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3021 elems.vht_cap_elem, sta);
818255ea 3022
30eb1dc2
JB		 3023 /*
3024 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3025 * in their association response, so ignore that data for our own
3026 * configuration. If it changed since the last beacon, we'll get the
3027 * next beacon and update then.
3028 */
1128958d 3029
bee7f586
JB		 3030 /*
3031 * If an operating mode notification IE is present, override the
3032 * NSS calculation (that would be done in rate_control_rate_init())
3033 * and use the # of streams from that element.
3034 */
3035 if (elems.opmode_notif &&
3036 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3037 u8 nss;
3038
3039 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3040 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3041 nss += 1;
3042 sta->sta.rx_nss = nss;
3043 }
3044
4b7679a5 3045 rate_control_rate_init(sta);
f0706e82 3046
5c48f120 3047 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 3048 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 3049
527871d7 3050 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3051
3e4d40fa 3052 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3053 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3054 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3055 if (err) {
bdcbd8e0
JB		 3056 sdata_info(sdata,
3057 "failed to move station %pM to desired state\n",
3058 sta->sta.addr);
c8987876
JB		 3059 WARN_ON(__sta_info_destroy(sta));
3060 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3061 ret = false;
3062 goto out;
c8987876
JB		 3063 }
3064
7852e361 3065 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3066
f2176d72
JO		 3067 /*
3068 * Always handle WMM once after association regardless
3069 * of the first value the AP uses. Setting -1 here has
3070 * that effect because the AP values is an unsigned
3071 * 4-bit value.
3072 */
3073 ifmgd->wmm_last_param_set = -1;
3074
095d81ce 3075 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3076 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3077 elems.wmm_param_len);
aa837e1d 3078 else
3abead59
JB		 3079 ieee80211_set_wmm_default(sdata, false);
3080 changed |= BSS_CHANGED_QOS;
f0706e82 3081
60f8b39c
JB		 3082 /* set AID and assoc capability,
3083 * ieee80211_set_associated() will tell the driver */
3084 bss_conf->aid = aid;
3085 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3086 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3087
d524215f
FF		 3088 /*
3089 * If we're using 4-addr mode, let the AP know that we're
3090 * doing so, so that it can create the STA VLAN on its side
3091 */
3092 if (ifmgd->use_4addr)
3093 ieee80211_send_4addr_nullfunc(local, sdata);
3094
15b7b062 3095 /*
b291ba11
JB		 3096 * Start timer to probe the connection to the AP now.
3097 * Also start the timer that will detect beacon loss.
15b7b062 3098 */
b291ba11 3099 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3100 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3101
35d865af
JB		 3102 ret = true;
3103 out:
3104 kfree(bss_ies);
3105 return ret;
f0706e82
JB		 3106}
3107
8d61ffa5
JB		 3108static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3109 struct ieee80211_mgmt *mgmt,
3110 size_t len)
66e67e41
JB		 3111{
3112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3113 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3114 u16 capab_info, status_code, aid;
3115 struct ieee802_11_elems elems;
b0b6aa2c 3116 int ac, uapsd_queues = -1;
66e67e41
JB		 3117 u8 *pos;
3118 bool reassoc;
8d61ffa5 3119 struct cfg80211_bss *bss;
d0d1a12f
EG		 3120 struct ieee80211_event event = {
3121 .type = MLME_EVENT,
3122 .u.mlme.data = ASSOC_EVENT,
3123 };
66e67e41 3124
8d61ffa5 3125 sdata_assert_lock(sdata);
66e67e41
JB		 3126
3127 if (!assoc_data)
8d61ffa5 3128 return;
b203ca39 3129 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3130 return;
66e67e41
JB		 3131
3132 /*
3133 * AssocResp and ReassocResp have identical structure, so process both
3134 * of them in this function.
3135 */
3136
3137 if (len < 24 + 6)
8d61ffa5 3138 return;
66e67e41
JB		 3139
3140 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3141 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3142 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3143 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3144
bdcbd8e0
JB		 3145 sdata_info(sdata,
3146 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3147 reassoc ? "Rea" : "A", mgmt->sa,
3148 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3149
3150 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3151 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3152
3153 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3154 elems.timeout_int &&
3155 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3156 u32 tu, ms;
79ba1d89 3157 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3158 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3159 sdata_info(sdata,
3160 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3161 mgmt->sa, tu, ms);
66e67e41 3162 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3163 assoc_data->timeout_started = true;
66e67e41 3164 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3165 run_again(sdata, assoc_data->timeout);
3166 return;
66e67e41
JB		 3167 }
3168
8d61ffa5 3169 bss = assoc_data->bss;
66e67e41
JB		 3170
3171 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3172 sdata_info(sdata, "%pM denied association (code=%d)\n",
3173 mgmt->sa, status_code);
66e67e41 3174 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3175 event.u.mlme.status = MLME_DENIED;
3176 event.u.mlme.reason = status_code;
3177 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3178 } else {
8d61ffa5 3179 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3180 /* oops -- internal error -- send timeout for now */
10a9109f 3181 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3182 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3183 return;
66e67e41 3184 }
d0d1a12f
EG		 3185 event.u.mlme.status = MLME_SUCCESS;
3186 drv_event_callback(sdata->local, sdata, &event);
635d999f 3187 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3188
3189 /*
3190 * destroy assoc_data afterwards, as otherwise an idle
3191 * recalc after assoc_data is NULL but before associated
3192 * is set can cause the interface to go idle
3193 */
3194 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3195
3196 /* get uapsd queues configuration */
3197 uapsd_queues = 0;
3198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3199 if (sdata->tx_conf[ac].uapsd)
3200 uapsd_queues |= BIT(ac);
66e67e41
JB		 3201 }
3202
b0b6aa2c 3203 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3204}
8e3c1b77 3205
98c8fccf 3206static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3207 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3208 struct ieee80211_rx_status *rx_status,
d45c4172 3209 struct ieee802_11_elems *elems)
98c8fccf
JB		 3210{
3211 struct ieee80211_local *local = sdata->local;
c2b13452 3212 struct ieee80211_bss *bss;
98c8fccf 3213 struct ieee80211_channel *channel;
56007a02 3214
8d61ffa5 3215 sdata_assert_lock(sdata);
b4f286a1 3216
3afc2167
EG		 3217 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3218 if (!channel)
98c8fccf
JB		 3219 return;
3220
98c8fccf 3221 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3222 channel);
817cee76 3223 if (bss) {
817cee76 3224 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3225 ieee80211_rx_bss_put(local, bss);
817cee76 3226 }
f0706e82
JB		 3227}
3228
3229
f698d856 3230static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3231 struct sk_buff *skb)
f0706e82 3232{
af6b6374 3233 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3234 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3235 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3236 size_t baselen, len = skb->len;
ae6a44e3
EK		 3237 struct ieee802_11_elems elems;
3238
15b7b062
KV		 3239 ifmgd = &sdata->u.mgd;
3240
8d61ffa5 3241 sdata_assert_lock(sdata);
77fdaa12 3242
b203ca39 3243 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3244 return; /* ignore ProbeResp to foreign address */
3245
ae6a44e3
EK		 3246 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3247 if (baselen > len)
3248 return;
3249
3250 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3251 false, &elems);
ae6a44e3 3252
d45c4172 3253 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3254
77fdaa12 3255 if (ifmgd->associated &&
b203ca39 3256 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3257 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3258}
3259
d91f36db
JB		 3260/*
3261 * This is the canonical list of information elements we care about,
3262 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3263 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3264 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3265 * changes to requested client power.
d91f36db
JB		 3266 *
3267 * We implement beacon filtering in software since that means we can
3268 * avoid processing the frame here and in cfg80211, and userspace
3269 * will not be able to tell whether the hardware supports it or not.
3270 *
3271 * XXX: This list needs to be dynamic -- userspace needs to be able to
3272 * add items it requires. It also needs to be able to tell us to
3273 * look out for other vendor IEs.
3274 */
3275static const u64 care_about_ies =
1d4df3a5
JB		 3276 (1ULL << WLAN_EID_COUNTRY) |
3277 (1ULL << WLAN_EID_ERP_INFO) |
3278 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3279 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3280 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3281 (1ULL << WLAN_EID_HT_OPERATION) |
3282 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3283
8d61ffa5
JB		 3284static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3285 struct ieee80211_mgmt *mgmt, size_t len,
3286 struct ieee80211_rx_status *rx_status)
f0706e82 3287{
d91f36db 3288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3289 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3290 size_t baselen;
3291 struct ieee802_11_elems elems;
f698d856 3292 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3293 struct ieee80211_chanctx_conf *chanctx_conf;
3294 struct ieee80211_channel *chan;
bee7f586 3295 struct sta_info *sta;
471b3efd 3296 u32 changed = 0;
f87ad637 3297 bool erp_valid;
7a5158ef 3298 u8 erp_value = 0;
d91f36db 3299 u32 ncrc;
77fdaa12 3300 u8 *bssid;
8d61ffa5 3301 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3302
8d61ffa5 3303 sdata_assert_lock(sdata);
f0706e82 3304
ae6a44e3
EK		 3305 /* Process beacon from the current BSS */
3306 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3307 if (baselen > len)
8d61ffa5 3308 return;
ae6a44e3 3309
55de908a
JB		 3310 rcu_read_lock();
3311 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3312 if (!chanctx_conf) {
3313 rcu_read_unlock();
8d61ffa5 3314 return;
55de908a
JB		 3315 }
3316
4bf88530 3317 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3318 rcu_read_unlock();
8d61ffa5 3319 return;
55de908a 3320 }
4bf88530 3321 chan = chanctx_conf->def.chan;
55de908a 3322 rcu_read_unlock();
f0706e82 3323
c65dd147 3324 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3325 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3326 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3327 len - baselen, false, &elems);
77fdaa12 3328
d45c4172 3329 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3330 if (elems.tim && !elems.parse_error) {
3331 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3332 ifmgd->dtim_period = tim_ie->dtim_period;
3333 }
989c6505 3334 ifmgd->have_beacon = true;
c65dd147 3335 ifmgd->assoc_data->need_beacon = false;
30686bf7 3336 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3337 sdata->vif.bss_conf.sync_tsf =
3338 le64_to_cpu(mgmt->u.beacon.timestamp);
3339 sdata->vif.bss_conf.sync_device_ts =
3340 rx_status->device_timestamp;
3341 if (elems.tim)
3342 sdata->vif.bss_conf.sync_dtim_count =
3343 elems.tim->dtim_count;
3344 else
3345 sdata->vif.bss_conf.sync_dtim_count = 0;
3346 }
66e67e41
JB		 3347 /* continue assoc process */
3348 ifmgd->assoc_data->timeout = jiffies;
89afe614 3349 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3350 run_again(sdata, ifmgd->assoc_data->timeout);
3351 return;
66e67e41 3352 }
77fdaa12 3353
66e67e41 3354 if (!ifmgd->associated ||
b203ca39 3355 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3356 return;
66e67e41 3357 bssid = ifmgd->associated->bssid;
f0706e82 3358
17e4ec14 3359 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3360 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3361 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3362 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3363 ifmgd->last_cqm_event_signal = 0;
391a200a 3364 ifmgd->count_beacon_signal = 1;
615f7b9b 3365 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3366 } else {
391a200a 3367 ifmgd->count_beacon_signal++;
17e4ec14 3368 }
615f7b9b 3369
338c17ae
JB		 3370 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3371
615f7b9b
MV		 3372 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3373 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3374 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3375 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3376 struct ieee80211_event event = {
3377 .type = RSSI_EVENT,
3378 };
615f7b9b
MV		 3379
3380 /*
3381 * if signal crosses either of the boundaries, invoke callback
3382 * with appropriate parameters
3383 */
3384 if (sig > ifmgd->rssi_max_thold &&
3385 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3386 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3387 event.u.rssi.data = RSSI_EVENT_HIGH;
3388 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3389 } else if (sig < ifmgd->rssi_min_thold &&
3390 (last_sig >= ifmgd->rssi_max_thold ||
3391 last_sig == 0)) {
3392 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3393 event.u.rssi.data = RSSI_EVENT_LOW;
3394 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3395 }
3396 }
3397
17e4ec14 3398 if (bss_conf->cqm_rssi_thold &&
391a200a 3399 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3400 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3401 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3402 int last_event = ifmgd->last_cqm_event_signal;
3403 int thold = bss_conf->cqm_rssi_thold;
3404 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3405
17e4ec14
JM		 3406 if (sig < thold &&
3407 (last_event == 0 || sig < last_event - hyst)) {
3408 ifmgd->last_cqm_event_signal = sig;
3409 ieee80211_cqm_rssi_notify(
3410 &sdata->vif,
3411 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3412 GFP_KERNEL);
3413 } else if (sig > thold &&
3414 (last_event == 0 || sig > last_event + hyst)) {
3415 ifmgd->last_cqm_event_signal = sig;
3416 ieee80211_cqm_rssi_notify(
3417 &sdata->vif,
3418 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3419 GFP_KERNEL);
3420 }
3421 }
3422
392b9ffb 3423 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3424 mlme_dbg_ratelimited(sdata,
112c31f0 3425 "cancelling AP probe due to a received beacon\n");
392b9ffb 3426 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3427 }
3428
b291ba11
JB		 3429 /*
3430 * Push the beacon loss detection into the future since
3431 * we are processing a beacon from the AP just now.
3432 */
d3a910a8 3433 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3434
d91f36db
JB		 3435 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3436 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3437 len - baselen, false, &elems,
d91f36db
JB		 3438 care_about_ies, ncrc);
3439
90d13e8f
JB		 3440 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3441 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3442 if (local->hw.conf.dynamic_ps_timeout > 0) {
3443 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3444 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3445 ieee80211_hw_config(local,
3446 IEEE80211_CONF_CHANGE_PS);
572e0012 3447 }
90d13e8f
JB		 3448 ieee80211_send_nullfunc(local, sdata, 0);
3449 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3450 local->pspolling = true;
3451
3452 /*
3453 * Here is assumed that the driver will be
3454 * able to send ps-poll frame and receive a
3455 * response even though power save mode is
3456 * enabled, but some drivers might require
3457 * to disable power save here. This needs
3458 * to be investigated.
3459 */
3460 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3461 }
3462 }
7a5158ef 3463
488dd7b5 3464 if (sdata->vif.p2p) {
67baf663 3465 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3466 int ret;
3467
3468 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3469 len - baselen,
3470 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3471 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3472 if (ret >= 2) {
3473 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3474 /* valid noa_attr and index changed */
3475 sdata->u.mgd.p2p_noa_index = noa.index;
3476 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3477 changed |= BSS_CHANGED_P2P_PS;
3478 /*
3479 * make sure we update all information, the CRC
3480 * mechanism doesn't look at P2P attributes.
3481 */
3482 ifmgd->beacon_crc_valid = false;
3483 }
3484 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3485 /* noa_attr not found and we had valid noa_attr before */
3486 sdata->u.mgd.p2p_noa_index = -1;
3487 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3488 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3489 ifmgd->beacon_crc_valid = false;
3490 }
3491 }
3492
0c21e632
LC		 3493 if (ifmgd->csa_waiting_bcn)
3494 ieee80211_chswitch_post_beacon(sdata);
3495
2ecc3905
AB		 3496 /*
3497 * Update beacon timing and dtim count on every beacon appearance. This
3498 * will allow the driver to use the most updated values. Do it before
3499 * comparing this one with last received beacon.
3500 * IMPORTANT: These parameters would possibly be out of sync by the time
3501 * the driver will use them. The synchronized view is currently
3502 * guaranteed only in certain callbacks.
3503 */
30686bf7 3504 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3505 sdata->vif.bss_conf.sync_tsf =
3506 le64_to_cpu(mgmt->u.beacon.timestamp);
3507 sdata->vif.bss_conf.sync_device_ts =
3508 rx_status->device_timestamp;
3509 if (elems.tim)
3510 sdata->vif.bss_conf.sync_dtim_count =
3511 elems.tim->dtim_count;
3512 else
3513 sdata->vif.bss_conf.sync_dtim_count = 0;
3514 }
3515
d8ec4433 3516 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3517 return;
30196673 3518 ifmgd->beacon_crc = ncrc;
d8ec4433 3519 ifmgd->beacon_crc_valid = true;
30196673 3520
d45c4172 3521 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3522
d70b7616 3523 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3524 rx_status->device_timestamp,
d70b7616
JB		 3525 &elems, true);
3526
095d81ce
JB		 3527 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3528 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3529 elems.wmm_param_len))
3530 changed |= BSS_CHANGED_QOS;
3531
c65dd147
EG		 3532 /*
3533 * If we haven't had a beacon before, tell the driver about the
ef429dad 3534 * DTIM period (and beacon timing if desired) now.
c65dd147 3535 */
989c6505 3536 if (!ifmgd->have_beacon) {
c65dd147
EG		 3537 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3538 if (elems.tim)
3539 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3540 else
3541 bss_conf->dtim_period = 1;
ef429dad 3542
989c6505
AB		 3543 changed |= BSS_CHANGED_BEACON_INFO;
3544 ifmgd->have_beacon = true;
482a9c74
AB		 3545
3546 mutex_lock(&local->iflist_mtx);
3547 ieee80211_recalc_ps(local, -1);
3548 mutex_unlock(&local->iflist_mtx);
3549
ce857888 3550 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3551 }
3552
1946bed9 3553 if (elems.erp_info) {
7a5158ef
JB		 3554 erp_valid = true;
3555 erp_value = elems.erp_info[0];
3556 } else {
3557 erp_valid = false;
50c4afb9 3558 }
7a5158ef
JB		 3559 changed |= ieee80211_handle_bss_capability(sdata,
3560 le16_to_cpu(mgmt->u.beacon.capab_info),
3561 erp_valid, erp_value);
f0706e82 3562
1128958d 3563 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3564 sta = sta_info_get(sdata, bssid);
3565
53b954ee
EP		 3566 if (ieee80211_config_bw(sdata, sta,
3567 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3568 elems.vht_operation, bssid, &changed)) {
3569 mutex_unlock(&local->sta_mtx);
3570 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3571 WLAN_REASON_DEAUTH_LEAVING,
3572 true, deauth_buf);
a90faa9d
EG		 3573 ieee80211_report_disconnect(sdata, deauth_buf,
3574 sizeof(deauth_buf), true,
3575 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3576 return;
30eb1dc2 3577 }
bee7f586
JB		 3578
3579 if (sta && elems.opmode_notif)
3580 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3581 rx_status->band, true);
1128958d 3582 mutex_unlock(&local->sta_mtx);
d3c990fb 3583
24a4e400
SG		 3584 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3585 elems.country_elem,
3586 elems.country_elem_len,
c8d65917
SG		 3587 elems.pwr_constr_elem,
3588 elems.cisco_dtpc_elem);
3f2355cb 3589
471b3efd 3590 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3591}
3592
1fa57d01
JB		 3593void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3594 struct sk_buff *skb)
f0706e82
JB		 3595{
3596 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3597 struct ieee80211_mgmt *mgmt;
3598 u16 fc;
1b3a2e49
JB		 3599 struct ieee802_11_elems elems;
3600 int ies_len;
f0706e82 3601
f0706e82
JB		 3602 rx_status = (struct ieee80211_rx_status *) skb->cb;
3603 mgmt = (struct ieee80211_mgmt *) skb->data;
3604 fc = le16_to_cpu(mgmt->frame_control);
3605
8d61ffa5 3606 sdata_lock(sdata);
77fdaa12 3607
66e67e41
JB		 3608 switch (fc & IEEE80211_FCTL_STYPE) {
3609 case IEEE80211_STYPE_BEACON:
8d61ffa5 3610 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3611 break;
3612 case IEEE80211_STYPE_PROBE_RESP:
3613 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3614 break;
3615 case IEEE80211_STYPE_AUTH:
8d61ffa5 3616 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3617 break;
3618 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3619 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3620 break;
3621 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3622 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3623 break;
3624 case IEEE80211_STYPE_ASSOC_RESP:
3625 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3626 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3627 break;
3628 case IEEE80211_STYPE_ACTION:
37799e52 3629 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3630 ies_len = skb->len -
3631 offsetof(struct ieee80211_mgmt,
3632 u.action.u.chan_switch.variable);
37799e52
JB		 3633
3634 if (ies_len < 0)
3635 break;
3636
3637 ieee802_11_parse_elems(
3638 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3639 ies_len, true, &elems);
37799e52
JB		 3640
3641 if (elems.parse_error)
3642 break;
3643
1b3a2e49 3644 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3645 rx_status->mactime,
3646 rx_status->device_timestamp,
3647 &elems, false);
1b3a2e49
JB		 3648 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3649 ies_len = skb->len -
3650 offsetof(struct ieee80211_mgmt,
3651 u.action.u.ext_chan_switch.variable);
3652
3653 if (ies_len < 0)
3654 break;
3655
3656 ieee802_11_parse_elems(
3657 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3658 ies_len, true, &elems);
1b3a2e49
JB		 3659
3660 if (elems.parse_error)
3661 break;
3662
3663 /* for the handling code pretend this was also an IE */
3664 elems.ext_chansw_ie =
3665 &mgmt->u.action.u.ext_chan_switch.data;
3666
66e67e41 3667 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3668 rx_status->mactime,
3669 rx_status->device_timestamp,
3670 &elems, false);
77fdaa12 3671 }
37799e52 3672 break;
77fdaa12 3673 }
8d61ffa5 3674 sdata_unlock(sdata);
f0706e82
JB		 3675}
3676
9c6bd790 3677static void ieee80211_sta_timer(unsigned long data)
f0706e82 3678{
60f8b39c
JB		 3679 struct ieee80211_sub_if_data *sdata =
3680 (struct ieee80211_sub_if_data *) data;
5bb644a0 3681
9b7d72c1 3682 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3683}
3684
04ac3c0e 3685static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3686 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3687{
6ae16775 3688 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3689
37ad3888 3690 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3691 tx, frame_buf);
37ad3888 3692
a90faa9d
EG		 3693 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3694 reason);
04ac3c0e
FF		 3695}
3696
46cad4b7 3697static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3698{
3699 struct ieee80211_local *local = sdata->local;
3700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3701 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3702 u32 tx_flags = 0;
46cad4b7
JB		 3703 u16 trans = 1;
3704 u16 status = 0;
66e67e41 3705
8d61ffa5 3706 sdata_assert_lock(sdata);
66e67e41
JB		 3707
3708 if (WARN_ON_ONCE(!auth_data))
3709 return -EINVAL;
3710
66e67e41
JB		 3711 auth_data->tries++;
3712
3713 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3714 sdata_info(sdata, "authentication with %pM timed out\n",
3715 auth_data->bss->bssid);
66e67e41
JB		 3716
3717 /*
3718 * Most likely AP is not in the range so remove the
3719 * bss struct for that AP.
3720 */
3721 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3722
3723 return -ETIMEDOUT;
3724 }
3725
a1845fc7
JB		 3726 drv_mgd_prepare_tx(local, sdata);
3727
46cad4b7
JB		 3728 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3729 auth_data->bss->bssid, auth_data->tries,
3730 IEEE80211_AUTH_MAX_TRIES);
6b8ece3a 3731
46cad4b7 3732 auth_data->expected_transaction = 2;
6b8ece3a 3733
46cad4b7
JB		 3734 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3735 trans = auth_data->sae_trans;
3736 status = auth_data->sae_status;
3737 auth_data->expected_transaction = trans;
3738 }
66e67e41 3739
46cad4b7
JB		 3740 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3741 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3742 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3743
46cad4b7
JB		 3744 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3745 auth_data->data, auth_data->data_len,
3746 auth_data->bss->bssid,
3747 auth_data->bss->bssid, NULL, 0, 0,
3748 tx_flags);
66e67e41 3749
6211dd12 3750 if (tx_flags == 0) {
1672c0e3 3751 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3752 auth_data->timeout_started = true;
8d61ffa5 3753 run_again(sdata, auth_data->timeout);
89afe614 3754 } else {
cb236d2d
JB		 3755 auth_data->timeout =
3756 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3757 auth_data->timeout_started = true;
3758 run_again(sdata, auth_data->timeout);
1672c0e3 3759 }
66e67e41
JB		 3760
3761 return 0;
3762}
3763
3764static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3765{
3766 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3767 struct ieee80211_local *local = sdata->local;
3768
8d61ffa5 3769 sdata_assert_lock(sdata);
66e67e41 3770
66e67e41
JB		 3771 assoc_data->tries++;
3772 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3773 sdata_info(sdata, "association with %pM timed out\n",
3774 assoc_data->bss->bssid);
66e67e41
JB		 3775
3776 /*
3777 * Most likely AP is not in the range so remove the
3778 * bss struct for that AP.
3779 */
3780 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3781
3782 return -ETIMEDOUT;
3783 }
3784
bdcbd8e0
JB		 3785 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3786 assoc_data->bss->bssid, assoc_data->tries,
3787 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3788 ieee80211_send_assoc(sdata);
3789
30686bf7 3790 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3791 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3792 assoc_data->timeout_started = true;
8d61ffa5 3793 run_again(sdata, assoc_data->timeout);
89afe614 3794 } else {
cb236d2d
JB		 3795 assoc_data->timeout =
3796 round_jiffies_up(jiffies +
3797 IEEE80211_ASSOC_TIMEOUT_LONG);
3798 assoc_data->timeout_started = true;
3799 run_again(sdata, assoc_data->timeout);
1672c0e3 3800 }
66e67e41
JB		 3801
3802 return 0;
3803}
3804
1672c0e3
JB		 3805void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3806 __le16 fc, bool acked)
3807{
3808 struct ieee80211_local *local = sdata->local;
3809
3810 sdata->u.mgd.status_fc = fc;
3811 sdata->u.mgd.status_acked = acked;
3812 sdata->u.mgd.status_received = true;
3813
3814 ieee80211_queue_work(&local->hw, &sdata->work);
3815}
3816
1fa57d01 3817void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3818{
9c6bd790 3819 struct ieee80211_local *local = sdata->local;
1fa57d01 3820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3821
8d61ffa5 3822 sdata_lock(sdata);
77fdaa12 3823
1672c0e3
JB		 3824 if (ifmgd->status_received) {
3825 __le16 fc = ifmgd->status_fc;
3826 bool status_acked = ifmgd->status_acked;
3827
3828 ifmgd->status_received = false;
46cad4b7 3829 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3830 if (status_acked) {
3831 ifmgd->auth_data->timeout =
3832 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3833 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3834 } else {
3835 ifmgd->auth_data->timeout = jiffies - 1;
3836 }
89afe614 3837 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3838 } else if (ifmgd->assoc_data &&
3839 (ieee80211_is_assoc_req(fc) ||
3840 ieee80211_is_reassoc_req(fc))) {
3841 if (status_acked) {
3842 ifmgd->assoc_data->timeout =
3843 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3844 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3845 } else {
3846 ifmgd->assoc_data->timeout = jiffies - 1;
3847 }
89afe614 3848 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3849 }
3850 }
3851
89afe614 3852 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3853 time_after(jiffies, ifmgd->auth_data->timeout)) {
3854 if (ifmgd->auth_data->done) {
3855 /*
3856 * ok ... we waited for assoc but userspace didn't,
3857 * so let's just kill the auth data
3858 */
3859 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3860 } else if (ieee80211_auth(sdata)) {
66e67e41 3861 u8 bssid[ETH_ALEN];
a9409093
EG		 3862 struct ieee80211_event event = {
3863 .type = MLME_EVENT,
3864 .u.mlme.data = AUTH_EVENT,
3865 .u.mlme.status = MLME_TIMEOUT,
3866 };
66e67e41
JB		 3867
3868 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3869
3870 ieee80211_destroy_auth_data(sdata, false);
3871
6ff57cf8 3872 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3873 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3874 }
89afe614 3875 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3876 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3877
89afe614 3878 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3879 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3880 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3881 ieee80211_do_assoc(sdata)) {
959867fa 3882 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3883 struct ieee80211_event event = {
3884 .type = MLME_EVENT,
3885 .u.mlme.data = ASSOC_EVENT,
3886 .u.mlme.status = MLME_TIMEOUT,
3887 };
66e67e41
JB		 3888
3889 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3890 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3891 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3892 }
89afe614 3893 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3894 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3895
392b9ffb 3896 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3897 ifmgd->associated) {
a43abf29 3898 u8 bssid[ETH_ALEN];
72a8a3ed 3899 int max_tries;
a43abf29 3900
0c1ad2ca 3901 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3902
30686bf7 3903 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3904 max_tries = max_nullfunc_tries;
72a8a3ed 3905 else
180205bd 3906 max_tries = max_probe_tries;
72a8a3ed 3907
4e5ff376
FF		 3908 /* ACK received for nullfunc probing frame */
3909 if (!ifmgd->probe_send_count)
3910 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3911 else if (ifmgd->nullfunc_failed) {
3912 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3913 mlme_dbg(sdata,
3914 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3915 bssid, ifmgd->probe_send_count,
3916 max_tries);
04ac3c0e
FF		 3917 ieee80211_mgd_probe_ap_send(sdata);
3918 } else {
bdcbd8e0
JB		 3919 mlme_dbg(sdata,
3920 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3921 bssid);
95acac61 3922 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3923 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3924 false);
04ac3c0e
FF		 3925 }
3926 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3927 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3928 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3929 mlme_dbg(sdata,
3930 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3931 bssid, probe_wait_ms);
95acac61 3932 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3933 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3934 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3935 mlme_dbg(sdata,
3936 "No probe response from AP %pM after %dms, try %d/%i\n",
3937 bssid, probe_wait_ms,
3938 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3939 ieee80211_mgd_probe_ap_send(sdata);
3940 } else {
b291ba11
JB		 3941 /*
3942 * We actually lost the connection ... or did we?
3943 * Let's make sure!
3944 */
b38afa87
BG		 3945 wiphy_debug(local->hw.wiphy,
3946 "%s: No probe response from AP %pM"
3947 " after %dms, disconnecting.\n",
3948 sdata->name,
180205bd 3949 bssid, probe_wait_ms);
04ac3c0e 3950
95acac61 3951 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3952 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3953 }
3954 }
3955
8d61ffa5 3956 sdata_unlock(sdata);
f0706e82
JB		 3957}
3958
b291ba11
JB		 3959static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3960{
3961 struct ieee80211_sub_if_data *sdata =
3962 (struct ieee80211_sub_if_data *) data;
0c21e632 3963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3964
0c21e632 3965 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3966 return;
3967
682bd38b 3968 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3969 ieee80211_queue_work(&sdata->local->hw,
3970 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3971}
3972
3973static void ieee80211_sta_conn_mon_timer(unsigned long data)
3974{
3975 struct ieee80211_sub_if_data *sdata =
3976 (struct ieee80211_sub_if_data *) data;
3977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3978 struct ieee80211_local *local = sdata->local;
3979
0c21e632 3980 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3981 return;
3982
42935eca 3983 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3984}
3985
3986static void ieee80211_sta_monitor_work(struct work_struct *work)
3987{
3988 struct ieee80211_sub_if_data *sdata =
3989 container_of(work, struct ieee80211_sub_if_data,
3990 u.mgd.monitor_work);
3991
3992 ieee80211_mgd_probe_ap(sdata, false);
3993}
3994
9c6bd790
JB		 3995static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3996{
ad935687 3997 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3998 __ieee80211_stop_poll(sdata);
ad935687 3999
b291ba11 4000 /* let's probe the connection once */
30686bf7 4001 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4002 ieee80211_queue_work(&sdata->local->hw,
4003 &sdata->u.mgd.monitor_work);
b291ba11 4004 /* and do all the other regular work too */
64592c8f 4005 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4006 }
9c6bd790 4007}
f0706e82 4008
b8360ab8 4009#ifdef CONFIG_PM
1a1cb744
JB		 4010void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4011{
4012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4013 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4014
4015 sdata_lock(sdata);
4016
c52666ae
EG		 4017 if (ifmgd->auth_data || ifmgd->assoc_data) {
4018 const u8 *bssid = ifmgd->auth_data ?
4019 ifmgd->auth_data->bss->bssid :
4020 ifmgd->assoc_data->bss->bssid;
4021
1a1cb744 4022 /*
c52666ae
EG		 4023 * If we are trying to authenticate / associate while suspending,
4024 * cfg80211 won't know and won't actually abort those attempts,
4025 * thus we need to do that ourselves.
1a1cb744 4026 */
c52666ae 4027 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4028 IEEE80211_STYPE_DEAUTH,
4029 WLAN_REASON_DEAUTH_LEAVING,
4030 false, frame_buf);
c52666ae
EG		 4031 if (ifmgd->assoc_data)
4032 ieee80211_destroy_assoc_data(sdata, false);
4033 if (ifmgd->auth_data)
4034 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4035 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4036 IEEE80211_DEAUTH_FRAME_LEN);
4037 }
4038
be72afe0
JB		 4039 /* This is a bit of a hack - we should find a better and more generic
4040 * solution to this. Normally when suspending, cfg80211 will in fact
4041 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4042 * auth (not so important) or assoc (this is the problem) process.
4043 *
4044 * As a consequence, it can happen that we are in the process of both
4045 * associating and suspending, and receive an association response
4046 * after cfg80211 has checked if it needs to disconnect, but before
4047 * we actually set the flag to drop incoming frames. This will then
4048 * cause the workqueue flush to process the association response in
4049 * the suspend, resulting in a successful association just before it
4050 * tries to remove the interface from the driver, which now though
4051 * has a channel context assigned ... this results in issues.
4052 *
4053 * To work around this (for now) simply deauth here again if we're
4054 * now connected.
4055 */
4056 if (ifmgd->associated && !sdata->local->wowlan) {
4057 u8 bssid[ETH_ALEN];
4058 struct cfg80211_deauth_request req = {
4059 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4060 .bssid = bssid,
4061 };
4062
4063 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4064 ieee80211_mgd_deauth(sdata, &req);
4065 }
4066
1a1cb744
JB		 4067 sdata_unlock(sdata);
4068}
4069
b8360ab8
JB		 4070void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4071{
4072 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4073
8d61ffa5 4074 sdata_lock(sdata);
b8360ab8 4075 if (!ifmgd->associated) {
8d61ffa5 4076 sdata_unlock(sdata);
b8360ab8
JB		 4077 return;
4078 }
4079
4080 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4081 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4082 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4083 ieee80211_sta_connection_lost(sdata,
4084 ifmgd->associated->bssid,
4085 WLAN_REASON_UNSPECIFIED,
4086 true);
8d61ffa5 4087 sdata_unlock(sdata);
b8360ab8
JB		 4088 return;
4089 }
8d61ffa5 4090 sdata_unlock(sdata);
b8360ab8
JB		 4091}
4092#endif
4093
9c6bd790
JB		 4094/* interface setup */
4095void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4096{
46900298 4097 struct ieee80211_if_managed *ifmgd;
988c0f72 4098
46900298 4099 ifmgd = &sdata->u.mgd;
b291ba11 4100 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4101 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4102 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4103 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4104 INIT_WORK(&ifmgd->csa_connection_drop_work,
4105 ieee80211_csa_connection_drop_work);
687da132 4106 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4107 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4108 ieee80211_tdls_peer_del_work);
46900298 4109 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4110 (unsigned long) sdata);
b291ba11
JB		 4111 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4112 (unsigned long) sdata);
4113 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4114 (unsigned long) sdata);
46900298 4115 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4116 (unsigned long) sdata);
02219b3a
JB		 4117 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4118 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4119
ab1faead 4120 ifmgd->flags = 0;
1478acb3 4121 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4122 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4123 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4124 ifmgd->p2p_noa_index = -1;
bbbdff9e 4125
0d8614b4 4126 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4127 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4128 else
4129 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4130
4131 /* Setup TDLS data */
4132 spin_lock_init(&ifmgd->teardown_lock);
4133 ifmgd->teardown_skb = NULL;
4134 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4135}
4136
77fdaa12
JB		 4137/* scan finished notification */
4138void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4139{
31ee67a1 4140 struct ieee80211_sub_if_data *sdata;
60f8b39c 4141
77fdaa12
JB		 4142 /* Restart STA timers */
4143 rcu_read_lock();
370bd005
BG		 4144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4145 if (ieee80211_sdata_running(sdata))
4146 ieee80211_restart_sta_timer(sdata);
4147 }
77fdaa12
JB		 4148 rcu_read_unlock();
4149}
60f8b39c 4150
77fdaa12
JB		 4151int ieee80211_max_network_latency(struct notifier_block *nb,
4152 unsigned long data, void *dummy)
4153{
4154 s32 latency_usec = (s32) data;
4155 struct ieee80211_local *local =
4156 container_of(nb, struct ieee80211_local,
4157 network_latency_notifier);
1fa6f4af 4158
77fdaa12
JB		 4159 mutex_lock(&local->iflist_mtx);
4160 ieee80211_recalc_ps(local, latency_usec);
4161 mutex_unlock(&local->iflist_mtx);
dfe67012 4162
8bd811aa 4163 return NOTIFY_OK;
9c6bd790
JB		 4164}
4165
f2d9d270
JB		 4166static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4167 struct cfg80211_bss *cbss)
4168{
4169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4170 const u8 *ht_cap_ie, *vht_cap_ie;
4171 const struct ieee80211_ht_cap *ht_cap;
4172 const struct ieee80211_vht_cap *vht_cap;
4173 u8 chains = 1;
4174
4175 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4176 return chains;
4177
9caf0364 4178 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4179 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4180 ht_cap = (void *)(ht_cap_ie + 2);
4181 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4182 /*
4183 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4184 * "Tx Unequal Modulation Supported" fields.
4185 */
4186 }
4187
4188 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4189 return chains;
4190
9caf0364 4191 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4192 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4193 u8 nss;
4194 u16 tx_mcs_map;
4195
4196 vht_cap = (void *)(vht_cap_ie + 2);
4197 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4198 for (nss = 8; nss > 0; nss--) {
4199 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4200 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4201 break;
4202 }
4203 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4204 chains = max(chains, nss);
4205 }
4206
4207 return chains;
4208}
4209
b17166a7
JB		 4210static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4211 struct cfg80211_bss *cbss)
a1cf775d
JB		 4212{
4213 struct ieee80211_local *local = sdata->local;
4214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4215 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4216 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4217 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4218 struct ieee80211_supported_band *sband;
4bf88530 4219 struct cfg80211_chan_def chandef;
f2d9d270 4220 int ret;
a1cf775d 4221
24398e39
JB		 4222 sband = local->hw.wiphy->bands[cbss->channel->band];
4223
f2d9d270
JB		 4224 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4225 IEEE80211_STA_DISABLE_80P80MHZ |
4226 IEEE80211_STA_DISABLE_160MHZ);
4227
9caf0364
JB		 4228 rcu_read_lock();
4229
f2d9d270
JB		 4230 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4231 sband->ht_cap.ht_supported) {
53b954ee 4232 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4233
9caf0364 4234 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4235 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4236 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4237
53b954ee
EP		 4238 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4239 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4240 ht_cap = (void *)(ht_cap_ie + 2);
4241
4242 if (!ht_cap) {
08e6effa
JB		 4243 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4244 ht_oper = NULL;
4245 }
24398e39
JB		 4246 }
4247
f2d9d270
JB		 4248 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4249 sband->vht_cap.vht_supported) {
08e6effa 4250 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4251
9caf0364
JB		 4252 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4253 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4254 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4255 vht_oper = (void *)(vht_oper_ie + 2);
4256 if (vht_oper && !ht_oper) {
4257 vht_oper = NULL;
bdcbd8e0 4258 sdata_info(sdata,
f2d9d270 4259 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4260 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4261 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4262 }
08e6effa
JB		 4263
4264 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4265 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4266 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4267 vht_oper = NULL;
4268 }
24398e39
JB		 4269 }
4270
f2d9d270
JB		 4271 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4272 cbss->channel,
53b954ee 4273 ht_cap, ht_oper, vht_oper,
5cdaed1e 4274 &chandef, false);
04ecd257 4275
f2d9d270
JB		 4276 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4277 local->rx_chains);
24398e39 4278
9caf0364
JB		 4279 rcu_read_unlock();
4280
04ecd257
JB		 4281 /* will change later if needed */
4282 sdata->smps_mode = IEEE80211_SMPS_OFF;
4283
34a3740d 4284 mutex_lock(&local->mtx);
f2d9d270
JB		 4285 /*
4286 * If this fails (possibly due to channel context sharing
4287 * on incompatible channels, e.g. 80+80 and 160 sharing the
4288 * same control channel) try to use a smaller bandwidth.
4289 */
4290 ret = ieee80211_vif_use_channel(sdata, &chandef,
4291 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4292
4293 /* don't downgrade for 5 and 10 MHz channels, though. */
4294 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4295 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4296 goto out;
0418a445 4297
d601cd8d 4298 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4299 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4300 ret = ieee80211_vif_use_channel(sdata, &chandef,
4301 IEEE80211_CHANCTX_SHARED);
4302 }
34a3740d
JB		 4303 out:
4304 mutex_unlock(&local->mtx);
f2d9d270 4305 return ret;
b17166a7
JB		 4306}
4307
4308static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4309 struct cfg80211_bss *cbss, bool assoc,
4310 bool override)
b17166a7
JB		 4311{
4312 struct ieee80211_local *local = sdata->local;
4313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4314 struct ieee80211_bss *bss = (void *)cbss->priv;
4315 struct sta_info *new_sta = NULL;
179b8fc7 4316 struct ieee80211_supported_band *sband;
c1041f10 4317 bool have_sta = false;
b17166a7
JB		 4318 int err;
4319
179b8fc7
CRI		 4320 sband = local->hw.wiphy->bands[cbss->channel->band];
4321
b17166a7
JB		 4322 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4323 return -EINVAL;
4324
4325 if (assoc) {
4326 rcu_read_lock();
4327 have_sta = sta_info_get(sdata, cbss->bssid);
4328 rcu_read_unlock();
4329 }
4330
4331 if (!have_sta) {
4332 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4333 if (!new_sta)
4334 return -ENOMEM;
4335 }
179b8fc7 4336
c1041f10 4337 if (new_sta || override) {
179b8fc7
CRI		 4338 err = ieee80211_prep_channel(sdata, cbss);
4339 if (err) {
4340 if (new_sta)
4341 sta_info_free(local, new_sta);
4342 return -EINVAL;
4343 }
4344 }
4345
13e0c8e3 4346 if (new_sta) {
5d6a1b06
JB		 4347 u32 rates = 0, basic_rates = 0;
4348 bool have_higher_than_11mbit;
4349 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4350 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4351 const struct cfg80211_bss_ies *ies;
179b8fc7 4352 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4353 u32 rate_flags;
b17166a7 4354
2103dec1
SW		 4355 rcu_read_lock();
4356 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4357 if (WARN_ON(!chanctx_conf)) {
4358 rcu_read_unlock();
c368ddaa 4359 sta_info_free(local, new_sta);
2103dec1
SW		 4360 return -EINVAL;
4361 }
4362 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4363 rcu_read_unlock();
5d6a1b06 4364
5d6a1b06
JB		 4365 ieee80211_get_rates(sband, bss->supp_rates,
4366 bss->supp_rates_len,
4367 &rates, &basic_rates,
4368 &have_higher_than_11mbit,
2103dec1
SW		 4369 &min_rate, &min_rate_index,
4370 shift, rate_flags);
5d6a1b06
JB		 4371
4372 /*
4373 * This used to be a workaround for basic rates missing
4374 * in the association response frame. Now that we no
4375 * longer use the basic rates from there, it probably
4376 * doesn't happen any more, but keep the workaround so
4377 * in case some *other* APs are buggy in different ways
4378 * we can connect -- with a warning.
4379 */
4380 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4381 sdata_info(sdata,
4382 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4383 basic_rates = BIT(min_rate_index);
4384 }
4385
13e0c8e3 4386 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4387 sdata->vif.bss_conf.basic_rates = basic_rates;
4388
4389 /* cf. IEEE 802.11 9.2.12 */
55de908a 4390 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4391 have_higher_than_11mbit)
4392 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4393 else
4394 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4395
4396 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4397
8c358bcd
JB		 4398 /* set timing information */
4399 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4400 rcu_read_lock();
ef429dad
JB		 4401 ies = rcu_dereference(cbss->beacon_ies);
4402 if (ies) {
4403 const u8 *tim_ie;
4404
4405 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4406 sdata->vif.bss_conf.sync_device_ts =
4407 bss->device_ts_beacon;
4408 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4409 ies->data, ies->len);
4410 if (tim_ie && tim_ie[1] >= 2)
4411 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4412 else
4413 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4414 } else if (!ieee80211_hw_check(&sdata->local->hw,
4415 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4416 ies = rcu_dereference(cbss->proberesp_ies);
4417 /* must be non-NULL since beacon IEs were NULL */
4418 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4419 sdata->vif.bss_conf.sync_device_ts =
4420 bss->device_ts_presp;
4421 sdata->vif.bss_conf.sync_dtim_count = 0;
4422 } else {
4423 sdata->vif.bss_conf.sync_tsf = 0;
4424 sdata->vif.bss_conf.sync_device_ts = 0;
4425 sdata->vif.bss_conf.sync_dtim_count = 0;
4426 }
8cef2c9d 4427 rcu_read_unlock();
8c358bcd
JB		 4428
4429 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4430 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4431 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4432 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4433
4434 if (assoc)
13e0c8e3 4435 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4436
13e0c8e3
JB		 4437 err = sta_info_insert(new_sta);
4438 new_sta = NULL;
a1cf775d 4439 if (err) {
bdcbd8e0
JB		 4440 sdata_info(sdata,
4441 "failed to insert STA entry for the AP (error %d)\n",
4442 err);
a1cf775d
JB		 4443 return err;
4444 }
4445 } else
b203ca39 4446 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4447
7d830a19
DS		 4448 /* Cancel scan to ensure that nothing interferes with connection */
4449 if (local->scanning)
4450 ieee80211_scan_cancel(local);
4451
a1cf775d
JB		 4452 return 0;
4453}
4454
77fdaa12
JB		 4455/* config hooks */
4456int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4457 struct cfg80211_auth_request *req)
9c6bd790 4458{
66e67e41
JB		 4459 struct ieee80211_local *local = sdata->local;
4460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4461 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4462 u16 auth_alg;
66e67e41
JB		 4463 int err;
4464
4465 /* prepare auth data structure */
9c6bd790 4466
77fdaa12
JB		 4467 switch (req->auth_type) {
4468 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4469 auth_alg = WLAN_AUTH_OPEN;
4470 break;
4471 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4472 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4473 return -EOPNOTSUPP;
77fdaa12
JB		 4474 auth_alg = WLAN_AUTH_SHARED_KEY;
4475 break;
4476 case NL80211_AUTHTYPE_FT:
4477 auth_alg = WLAN_AUTH_FT;
4478 break;
4479 case NL80211_AUTHTYPE_NETWORK_EAP:
4480 auth_alg = WLAN_AUTH_LEAP;
4481 break;
6b8ece3a
JM		 4482 case NL80211_AUTHTYPE_SAE:
4483 auth_alg = WLAN_AUTH_SAE;
4484 break;
77fdaa12
JB		 4485 default:
4486 return -EOPNOTSUPP;
60f8b39c 4487 }
77fdaa12 4488
6b8ece3a
JM		 4489 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4490 req->ie_len, GFP_KERNEL);
66e67e41 4491 if (!auth_data)
9c6bd790 4492 return -ENOMEM;
77fdaa12 4493
66e67e41 4494 auth_data->bss = req->bss;
77fdaa12 4495
6b8ece3a
JM		 4496 if (req->sae_data_len >= 4) {
4497 __le16 *pos = (__le16 *) req->sae_data;
4498 auth_data->sae_trans = le16_to_cpu(pos[0]);
4499 auth_data->sae_status = le16_to_cpu(pos[1]);
4500 memcpy(auth_data->data, req->sae_data + 4,
4501 req->sae_data_len - 4);
4502 auth_data->data_len += req->sae_data_len - 4;
4503 }
4504
77fdaa12 4505 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4506 memcpy(&auth_data->data[auth_data->data_len],
4507 req->ie, req->ie_len);
4508 auth_data->data_len += req->ie_len;
9c6bd790 4509 }
77fdaa12 4510
fffd0934 4511 if (req->key && req->key_len) {
66e67e41
JB		 4512 auth_data->key_len = req->key_len;
4513 auth_data->key_idx = req->key_idx;
4514 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4515 }
4516
66e67e41 4517 auth_data->algorithm = auth_alg;
60f8b39c 4518
66e67e41 4519 /* try to authenticate/probe */
2a33bee2 4520
66e67e41
JB		 4521 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4522 ifmgd->assoc_data) {
4523 err = -EBUSY;
4524 goto err_free;
2a33bee2
GE		 4525 }
4526
66e67e41
JB		 4527 if (ifmgd->auth_data)
4528 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4529
66e67e41
JB		 4530 /* prep auth_data so we don't go into idle on disassoc */
4531 ifmgd->auth_data = auth_data;
af6b6374 4532
7b119dc0
JB		 4533 if (ifmgd->associated) {
4534 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4535
4536 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4537 WLAN_REASON_UNSPECIFIED,
4538 false, frame_buf);
4539
a90faa9d
EG		 4540 ieee80211_report_disconnect(sdata, frame_buf,
4541 sizeof(frame_buf), true,
4542 WLAN_REASON_UNSPECIFIED);
7b119dc0 4543 }
af6b6374 4544
bdcbd8e0 4545 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4546
c1041f10 4547 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4548 if (err)
66e67e41 4549 goto err_clear;
af6b6374 4550
46cad4b7 4551 err = ieee80211_auth(sdata);
66e67e41 4552 if (err) {
66e67e41
JB		 4553 sta_info_destroy_addr(sdata, req->bss->bssid);
4554 goto err_clear;
4555 }
4556
4557 /* hold our own reference */
5b112d3d 4558 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4559 return 0;
66e67e41
JB		 4560
4561 err_clear:
c84a67a2 4562 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4564 ifmgd->auth_data = NULL;
d01f858c
MK		 4565 mutex_lock(&sdata->local->mtx);
4566 ieee80211_vif_release_channel(sdata);
4567 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4568 err_free:
4569 kfree(auth_data);
66e67e41 4570 return err;
af6b6374
JB		 4571}
4572
095d81ce
JB		 4573static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4574 const u8 *wmm_param, int len)
4575{
4576 const u8 *pos;
4577 size_t left;
4578
4579 if (len < 8)
4580 return false;
4581
4582 if (wmm_param[5] != 1 /* version */)
4583 return false;
4584
4585 pos = wmm_param + 8;
4586 left = len - 8;
4587
4588 for (; left >= 4; left -= 4, pos += 4) {
4589 u8 aifsn = pos[0] & 0x0f;
4590 u8 ecwmin = pos[1] & 0x0f;
4591 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4592 int aci = (pos[0] >> 5) & 0x03;
4593
4594 if (aifsn < 2) {
4595 sdata_info(sdata,
4596 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4597 aifsn, aci);
4598 return false;
4599 }
4600 if (ecwmin > ecwmax) {
4601 sdata_info(sdata,
4602 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4603 ecwmin, ecwmax, aci);
4604 return false;
4605 }
4606 }
4607
4608 return true;
4609}
4610
77fdaa12
JB		 4611int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4612 struct cfg80211_assoc_request *req)
f0706e82 4613{
66e67e41 4614 struct ieee80211_local *local = sdata->local;
77fdaa12 4615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4616 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4617 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4618 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4619 struct ieee80211_supported_band *sband;
b08fbbd8 4620 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4621 int i, err;
c1041f10 4622 bool override = false;
f0706e82 4623
66e67e41
JB		 4624 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4625 if (!assoc_data)
4626 return -ENOMEM;
4627
9caf0364
JB		 4628 rcu_read_lock();
4629 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4630 if (!ssidie) {
4631 rcu_read_unlock();
4632 kfree(assoc_data);
4633 return -EINVAL;
4634 }
4635 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4636 assoc_data->ssid_len = ssidie[1];
4637 rcu_read_unlock();
4638
7b119dc0
JB		 4639 if (ifmgd->associated) {
4640 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4641
4642 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4643 WLAN_REASON_UNSPECIFIED,
4644 false, frame_buf);
4645
a90faa9d
EG		 4646 ieee80211_report_disconnect(sdata, frame_buf,
4647 sizeof(frame_buf), true,
4648 WLAN_REASON_UNSPECIFIED);
7b119dc0 4649 }
66e67e41
JB		 4650
4651 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4652 err = -EBUSY;
4653 goto err_free;
af6b6374 4654 }
77fdaa12 4655
66e67e41
JB		 4656 if (ifmgd->assoc_data) {
4657 err = -EBUSY;
4658 goto err_free;
4659 }
77fdaa12 4660
66e67e41
JB		 4661 if (ifmgd->auth_data) {
4662 bool match;
4663
4664 /* keep sta info, bssid if matching */
b203ca39 4665 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4666 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4667 }
4668
66e67e41 4669 /* prepare assoc data */
095d81ce 4670
d8ec4433
JO		 4671 ifmgd->beacon_crc_valid = false;
4672
095d81ce
JB		 4673 assoc_data->wmm = bss->wmm_used &&
4674 (local->hw.queues >= IEEE80211_NUM_ACS);
4675 if (assoc_data->wmm) {
4676 /* try to check validity of WMM params IE */
4677 const struct cfg80211_bss_ies *ies;
4678 const u8 *wp, *start, *end;
4679
4680 rcu_read_lock();
4681 ies = rcu_dereference(req->bss->ies);
4682 start = ies->data;
4683 end = start + ies->len;
4684
4685 while (true) {
4686 wp = cfg80211_find_vendor_ie(
4687 WLAN_OUI_MICROSOFT,
4688 WLAN_OUI_TYPE_MICROSOFT_WMM,
4689 start, end - start);
4690 if (!wp)
4691 break;
4692 start = wp + wp[1] + 2;
4693 /* if this IE is too short, try the next */
4694 if (wp[1] <= 4)
4695 continue;
4696 /* if this IE is WMM params, we found what we wanted */
4697 if (wp[6] == 1)
4698 break;
4699 }
4700
4701 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4702 wp[1] - 2)) {
4703 assoc_data->wmm = false;
4704 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4705 }
4706 rcu_read_unlock();
4707 }
4708
de5036aa
JB		 4709 /*
4710 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4711 * We still associate in non-HT mode (11a/b/g) if any one of these
4712 * ciphers is configured as pairwise.
4713 * We can set this to true for non-11n hardware, that'll be checked
4714 * separately along with the peer capabilities.
4715 */
1c4cb928 4716 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4717 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4718 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4719 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4720 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4721 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4722 netdev_info(sdata->dev,
d545daba 4723 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4724 }
4725 }
77fdaa12 4726
4e74bfdb
JB		 4727 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4728 sband = local->hw.wiphy->bands[req->bss->channel->band];
4729 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4730 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4731 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4732 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4733 if (!bss->wmm_used &&
4734 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4735 netdev_info(sdata->dev,
4736 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4737 }
4e74bfdb 4738
d545daba
MP		 4739 /* disable VHT if we don't support it or the AP doesn't use WMM */
4740 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4741 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4742 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4743 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4744 if (!bss->wmm_used &&
4745 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4746 netdev_info(sdata->dev,
4747 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4748 }
4749
ef96a842
BG		 4750 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4751 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4752 sizeof(ifmgd->ht_capa_mask));
4753
dd5ecfea
JB		 4754 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4755 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4756 sizeof(ifmgd->vht_capa_mask));
4757
77fdaa12 4758 if (req->ie && req->ie_len) {
66e67e41
JB		 4759 memcpy(assoc_data->ie, req->ie, req->ie_len);
4760 assoc_data->ie_len = req->ie_len;
4761 }
f679f65d 4762
66e67e41 4763 assoc_data->bss = req->bss;
f679f65d 4764
af6b6374
JB		 4765 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4766 if (ifmgd->powersave)
04ecd257 4767 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4768 else
04ecd257 4769 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4770 } else
04ecd257 4771 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4772
66e67e41 4773 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4774 assoc_data->supp_rates = bss->supp_rates;
4775 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4776
9caf0364 4777 rcu_read_lock();
9dde6423
JB		 4778 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4779 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4780 assoc_data->ap_ht_param =
4781 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4782 else
a8243b72 4783 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4784 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4785 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4786 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4787 sizeof(struct ieee80211_vht_cap));
4788 else
4789 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4790 rcu_read_unlock();
63f170e0 4791
848955cc 4792 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4793 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4794 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4795 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4796
ab13315a 4797 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4798 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4799 assoc_data->uapsd = true;
ab13315a
KV		 4800 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4801 } else {
76f0303d 4802 assoc_data->uapsd = false;
ab13315a
KV		 4803 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4804 }
4805
77fdaa12 4806 if (req->prev_bssid)
66e67e41 4807 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4808
4809 if (req->use_mfp) {
4810 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4811 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4812 } else {
4813 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4814 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4815 }
4816
cd2f5dd7
AK		 4817 if (req->flags & ASSOC_REQ_USE_RRM)
4818 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4819 else
4820 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4821
77fdaa12
JB		 4822 if (req->crypto.control_port)
4823 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4824 else
4825 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4826
a621fa4d
JB		 4827 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4828 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4829 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4830 sdata->vif.type);
a621fa4d 4831
66e67e41
JB		 4832 /* kick off associate process */
4833
4834 ifmgd->assoc_data = assoc_data;
826262c3 4835 ifmgd->dtim_period = 0;
989c6505 4836 ifmgd->have_beacon = false;
66e67e41 4837
c1041f10
CRI		 4838 /* override HT/VHT configuration only if the AP and we support it */
4839 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4840 struct ieee80211_sta_ht_cap sta_ht_cap;
4841
4842 if (req->flags & ASSOC_REQ_DISABLE_HT)
4843 override = true;
4844
4845 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4846 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4847
4848 /* check for 40 MHz disable override */
4849 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4850 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4851 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4852 override = true;
4853
4854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4855 req->flags & ASSOC_REQ_DISABLE_VHT)
4856 override = true;
4857 }
4858
4859 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4860 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4861 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4862 }
4863
4864 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4865 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4866
4867 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4868 if (err)
4869 goto err_clear;
66e67e41 4870
c65dd147
EG		 4871 rcu_read_lock();
4872 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4873
30686bf7 4874 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4875 !beacon_ies) {
4876 /*
4877 * Wait up to one beacon interval ...
4878 * should this be more if we miss one?
4879 */
4880 sdata_info(sdata, "waiting for beacon from %pM\n",
4881 ifmgd->bssid);
4882 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4883 assoc_data->timeout_started = true;
c65dd147
EG		 4884 assoc_data->need_beacon = true;
4885 } else if (beacon_ies) {
4886 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4887 beacon_ies->data,
4888 beacon_ies->len);
ef429dad
JB		 4889 u8 dtim_count = 0;
4890
c65dd147
EG		 4891 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4892 const struct ieee80211_tim_ie *tim;
4893 tim = (void *)(tim_ie + 2);
4894 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4895 dtim_count = tim->dtim_count;
826262c3 4896 }
989c6505 4897 ifmgd->have_beacon = true;
66e67e41 4898 assoc_data->timeout = jiffies;
89afe614 4899 assoc_data->timeout_started = true;
ef429dad 4900
30686bf7 4901 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4902 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4903 sdata->vif.bss_conf.sync_device_ts =
4904 bss->device_ts_beacon;
4905 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4906 }
c65dd147
EG		 4907 } else {
4908 assoc_data->timeout = jiffies;
89afe614 4909 assoc_data->timeout_started = true;
66e67e41 4910 }
c65dd147
EG		 4911 rcu_read_unlock();
4912
8d61ffa5 4913 run_again(sdata, assoc_data->timeout);
66e67e41 4914
fcff4f10
PS		 4915 if (bss->corrupt_data) {
4916 char *corrupt_type = "data";
4917 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4918 if (bss->corrupt_data &
4919 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4920 corrupt_type = "beacon and probe response";
4921 else
4922 corrupt_type = "beacon";
4923 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4924 corrupt_type = "probe response";
bdcbd8e0
JB		 4925 sdata_info(sdata, "associating with AP with corrupt %s\n",
4926 corrupt_type);
fcff4f10
PS		 4927 }
4928
8d61ffa5 4929 return 0;
66e67e41 4930 err_clear:
c84a67a2 4931 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4932 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4933 ifmgd->assoc_data = NULL;
4934 err_free:
4935 kfree(assoc_data);
66e67e41 4936 return err;
f0706e82
JB		 4937}
4938
77fdaa12 4939int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4940 struct cfg80211_deauth_request *req)
f0706e82 4941{
46900298 4942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4943 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4944 bool tx = !req->local_state_change;
f0706e82 4945
c9c3a060
JB		 4946 if (ifmgd->auth_data &&
4947 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4948 sdata_info(sdata,
4949 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4950 req->bssid, req->reason_code,
4951 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4952
8c7d857c 4953 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4954 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4955 IEEE80211_STYPE_DEAUTH,
6863255b 4956 req->reason_code, tx,
37ad3888 4957 frame_buf);
86552017 4958 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4959 ieee80211_report_disconnect(sdata, frame_buf,
4960 sizeof(frame_buf), true,
4961 req->reason_code);
86552017 4962
c9c3a060 4963 return 0;
8c7d857c
EG		 4964 }
4965
86552017
JB		 4966 if (ifmgd->associated &&
4967 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4968 sdata_info(sdata,
4969 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4970 req->bssid, req->reason_code,
4971 ieee80211_get_reason_code_string(req->reason_code));
4972
86552017
JB		 4973 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4974 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4975 ieee80211_report_disconnect(sdata, frame_buf,
4976 sizeof(frame_buf), true,
4977 req->reason_code);
c9c3a060
JB		 4978 return 0;
4979 }
86552017 4980
c9c3a060 4981 return -ENOTCONN;
f0706e82 4982}
84363e6e 4983
77fdaa12 4984int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4985 struct cfg80211_disassoc_request *req)
9c6bd790 4986{
77fdaa12 4987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4988 u8 bssid[ETH_ALEN];
6ae16775 4989 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4990
8d8b261a
JB		 4991 /*
4992 * cfg80211 should catch this ... but it's racy since
4993 * we can receive a disassoc frame, process it, hand it
4994 * to cfg80211 while that's in a locked section already
4995 * trying to tell us that the user wants to disconnect.
4996 */
8d61ffa5 4997 if (ifmgd->associated != req->bss)
77fdaa12 4998 return -ENOLINK;
77fdaa12 4999
bdcbd8e0 5000 sdata_info(sdata,
dfa1ad29
CO		 5001 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5002 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5003
e69e95db 5004 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5005 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5006 req->reason_code, !req->local_state_change,
5007 frame_buf);
10f644a4 5008
a90faa9d
EG		 5009 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5010 req->reason_code);
bc83b681 5011
10f644a4
JB		 5012 return 0;
5013}
026331c4 5014
afa762f6 5015void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5016{
5017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5018
49921859
BG		 5019 /*
5020 * Make sure some work items will not run after this,
5021 * they will not do anything but might not have been
5022 * cancelled when disconnecting.
5023 */
5024 cancel_work_sync(&ifmgd->monitor_work);
5025 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5026 cancel_work_sync(&ifmgd->request_smps_work);
5027 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5028 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5029 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5030
8d61ffa5 5031 sdata_lock(sdata);
959867fa
JB		 5032 if (ifmgd->assoc_data) {
5033 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5034 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5035 cfg80211_assoc_timeout(sdata->dev, bss);
5036 }
54e4ffb2
JB		 5037 if (ifmgd->auth_data)
5038 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5039 spin_lock_bh(&ifmgd->teardown_lock);
5040 if (ifmgd->teardown_skb) {
5041 kfree_skb(ifmgd->teardown_skb);
5042 ifmgd->teardown_skb = NULL;
5043 ifmgd->orig_teardown_skb = NULL;
5044 }
5045 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5046 del_timer_sync(&ifmgd->timer);
8d61ffa5 5047 sdata_unlock(sdata);
54e4ffb2
JB		 5048}
5049
a97c13c3
JO		 5050void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5051 enum nl80211_cqm_rssi_threshold_event rssi_event,
5052 gfp_t gfp)
5053{
5054 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5055
b5878a2d
JB		 5056 trace_api_cqm_rssi_notify(sdata, rssi_event);
5057
a97c13c3
JO		 5058 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5059}
5060EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5061
5062void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5063{
5064 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5065
5066 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5067
5068 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5069}
5070EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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