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mac80211: respect rate mask in TX
[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>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 34#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 35#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 39#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 40#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 42
180205bd
BG		 43static int max_nullfunc_tries = 2;
44module_param(max_nullfunc_tries, int, 0644);
45MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48static int max_probe_tries = 5;
49module_param(max_probe_tries, int, 0644);
50MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 52
53/*
7ccc8bd7
FF		 54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
b291ba11 60 */
59c1ec2b
BG		 61static int beacon_loss_count = 7;
62module_param(beacon_loss_count, int, 0644);
63MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 65
b291ba11
JB		 66/*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
d1c5091f 70#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 71/*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
180205bd
BG		 76static int probe_wait_ms = 500;
77module_param(probe_wait_ms, int, 0644);
78MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
f0706e82 81
17e4ec14
JM		 82/*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87#define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
391a200a
JM		 89/*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
ca386f31
JB		 95/*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
8d61ffa5
JB		 105static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
ca386f31 107{
8d61ffa5 108 sdata_assert_lock(sdata);
ca386f31 109
8d61ffa5
JB		 110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 113}
114
d3a910a8 115void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 116{
c1288b12 117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 118 return;
119
7eeff74c
JB		 120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
b291ba11 123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 125}
126
be099e82
LR		 127void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128{
0c699c3a
LR		 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
8628172f
SG		 131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
be099e82
LR		 134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 139
140 ifmgd->probe_send_count = 0;
be099e82
LR		 141}
142
5484e237 143static int ecw2cw(int ecw)
60f8b39c 144{
5484e237 145 return (1 << ecw) - 1;
60f8b39c
JB		 146}
147
6565ec9b
JB		 148static u32 chandef_downgrade(struct cfg80211_chan_def *c)
149{
150 u32 ret;
151 int tmp;
152
153 switch (c->width) {
154 case NL80211_CHAN_WIDTH_20:
155 c->width = NL80211_CHAN_WIDTH_20_NOHT;
156 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
157 break;
158 case NL80211_CHAN_WIDTH_40:
159 c->width = NL80211_CHAN_WIDTH_20;
160 c->center_freq1 = c->chan->center_freq;
161 ret = IEEE80211_STA_DISABLE_40MHZ |
162 IEEE80211_STA_DISABLE_VHT;
163 break;
164 case NL80211_CHAN_WIDTH_80:
165 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
166 /* n_P40 */
167 tmp /= 2;
168 /* freq_P40 */
169 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
170 c->width = NL80211_CHAN_WIDTH_40;
171 ret = IEEE80211_STA_DISABLE_VHT;
172 break;
173 case NL80211_CHAN_WIDTH_80P80:
174 c->center_freq2 = 0;
175 c->width = NL80211_CHAN_WIDTH_80;
176 ret = IEEE80211_STA_DISABLE_80P80MHZ |
177 IEEE80211_STA_DISABLE_160MHZ;
178 break;
179 case NL80211_CHAN_WIDTH_160:
180 /* n_P20 */
181 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
182 /* n_P80 */
183 tmp /= 4;
184 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
185 c->width = NL80211_CHAN_WIDTH_80;
186 ret = IEEE80211_STA_DISABLE_80P80MHZ |
187 IEEE80211_STA_DISABLE_160MHZ;
188 break;
189 default:
190 case NL80211_CHAN_WIDTH_20_NOHT:
191 WARN_ON_ONCE(1);
192 c->width = NL80211_CHAN_WIDTH_20_NOHT;
193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 break;
0418a445
SW		 195 case NL80211_CHAN_WIDTH_5:
196 case NL80211_CHAN_WIDTH_10:
197 WARN_ON_ONCE(1);
198 /* keep c->width */
199 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
200 break;
6565ec9b
JB		 201 }
202
203 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
204
205 return ret;
206}
207
208static u32
209ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
210 struct ieee80211_supported_band *sband,
211 struct ieee80211_channel *channel,
212 const struct ieee80211_ht_operation *ht_oper,
213 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 214 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 215{
5cdaed1e 216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 217 struct cfg80211_chan_def vht_chandef;
218 u32 ht_cfreq, ret;
219
220 chandef->chan = channel;
221 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
222 chandef->center_freq1 = channel->center_freq;
223 chandef->center_freq2 = 0;
224
225 if (!ht_oper || !sband->ht_cap.ht_supported) {
226 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
227 goto out;
228 }
229
230 chandef->width = NL80211_CHAN_WIDTH_20;
231
232 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
233 channel->band);
234 /* check that channel matches the right operating channel */
5cdaed1e 235 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 236 /*
237 * It's possible that some APs are confused here;
238 * Netgear WNDR3700 sometimes reports 4 higher than
239 * the actual channel in association responses, but
240 * since we look at probe response/beacon data here
241 * it should be OK.
242 */
5cdaed1e
JB		 243 sdata_info(sdata,
244 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
245 channel->center_freq, ht_cfreq,
246 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 247 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
248 goto out;
249 }
250
251 /* check 40 MHz support, if we have it */
252 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
253 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
254 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
255 chandef->width = NL80211_CHAN_WIDTH_40;
256 chandef->center_freq1 += 10;
257 break;
258 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
259 chandef->width = NL80211_CHAN_WIDTH_40;
260 chandef->center_freq1 -= 10;
261 break;
262 }
263 } else {
264 /* 40 MHz (and 80 MHz) must be supported for VHT */
265 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 266 /* also mark 40 MHz disabled */
267 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 268 goto out;
269 }
270
271 if (!vht_oper || !sband->vht_cap.vht_supported) {
272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 vht_chandef.chan = channel;
277 vht_chandef.center_freq1 =
278 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
279 channel->band);
280 vht_chandef.center_freq2 = 0;
281
6565ec9b
JB		 282 switch (vht_oper->chan_width) {
283 case IEEE80211_VHT_CHANWIDTH_USE_HT:
284 vht_chandef.width = chandef->width;
285 break;
286 case IEEE80211_VHT_CHANWIDTH_80MHZ:
287 vht_chandef.width = NL80211_CHAN_WIDTH_80;
288 break;
289 case IEEE80211_VHT_CHANWIDTH_160MHZ:
290 vht_chandef.width = NL80211_CHAN_WIDTH_160;
291 break;
292 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
293 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 294 vht_chandef.center_freq2 =
295 ieee80211_channel_to_frequency(
296 vht_oper->center_freq_seg2_idx,
297 channel->band);
6565ec9b
JB		 298 break;
299 default:
5cdaed1e 300 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 301 sdata_info(sdata,
302 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
303 vht_oper->chan_width);
6565ec9b
JB		 304 ret = IEEE80211_STA_DISABLE_VHT;
305 goto out;
306 }
307
308 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 309 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 310 sdata_info(sdata,
311 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 312 ret = IEEE80211_STA_DISABLE_VHT;
313 goto out;
314 }
315
316 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
317 ret = 0;
318 goto out;
319 }
320
321 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 322 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 323 sdata_info(sdata,
324 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 325 ret = IEEE80211_STA_DISABLE_VHT;
326 goto out;
327 }
328
329 *chandef = vht_chandef;
330
331 ret = 0;
332
333out:
586e01ed
JB		 334 /* don't print the message below for VHT mismatch if VHT is disabled */
335 if (ret & IEEE80211_STA_DISABLE_VHT)
336 vht_chandef = *chandef;
337
ddfe49b4
JB		 338 /*
339 * Ignore the DISABLED flag when we're already connected and only
340 * tracking the APs beacon for bandwidth changes - otherwise we
341 * might get disconnected here if we connect to an AP, update our
342 * regulatory information based on the AP's country IE and the
343 * information we have is wrong/outdated and disables the channel
344 * that we're actually using for the connection to the AP.
345 */
6565ec9b 346 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 347 tracking ? 0 :
348 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 349 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
350 ret = IEEE80211_STA_DISABLE_HT |
351 IEEE80211_STA_DISABLE_VHT;
b56e4b85 352 break;
6565ec9b
JB		 353 }
354
355 ret |= chandef_downgrade(chandef);
356 }
357
5cdaed1e 358 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 359 sdata_info(sdata,
360 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
361
362 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
363 return ret;
364}
365
30eb1dc2
JB		 366static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
367 struct sta_info *sta,
368 const struct ieee80211_ht_operation *ht_oper,
369 const struct ieee80211_vht_operation *vht_oper,
370 const u8 *bssid, u32 *changed)
d5522e03
JB		 371{
372 struct ieee80211_local *local = sdata->local;
30eb1dc2 373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 374 struct ieee80211_supported_band *sband;
55de908a 375 struct ieee80211_channel *chan;
30eb1dc2 376 struct cfg80211_chan_def chandef;
9ed6bcce 377 u16 ht_opmode;
30eb1dc2
JB		 378 u32 flags;
379 enum ieee80211_sta_rx_bandwidth new_sta_bw;
380 int ret;
d5522e03 381
30eb1dc2
JB		 382 /* if HT was/is disabled, don't track any bandwidth changes */
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 384 return 0;
385
30eb1dc2
JB		 386 /* don't check VHT if we associated as non-VHT station */
387 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
388 vht_oper = NULL;
389
390 if (WARN_ON_ONCE(!sta))
391 return -EINVAL;
392
f2d9330e 393 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 394 sband = local->hw.wiphy->bands[chan->band];
d5522e03 395
30eb1dc2
JB		 396 /* calculate new channel (type) based on HT/VHT operation IEs */
397 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
5cdaed1e 398 vht_oper, &chandef, true);
30eb1dc2
JB		 399
400 /*
401 * Downgrade the new channel if we associated with restricted
402 * capabilities. For example, if we associated as a 20 MHz STA
403 * to a 40 MHz AP (due to regulatory, capabilities or config
404 * reasons) then switching to a 40 MHz channel now won't do us
405 * any good -- we couldn't use it with the AP.
406 */
407 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
408 chandef.width == NL80211_CHAN_WIDTH_80P80)
409 flags |= chandef_downgrade(&chandef);
410 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
411 chandef.width == NL80211_CHAN_WIDTH_160)
412 flags |= chandef_downgrade(&chandef);
413 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
414 chandef.width > NL80211_CHAN_WIDTH_20)
415 flags |= chandef_downgrade(&chandef);
416
417 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
418 return 0;
419
420 sdata_info(sdata,
421 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
422 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
423 chandef.center_freq1, chandef.center_freq2);
424
425 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
426 IEEE80211_STA_DISABLE_VHT |
427 IEEE80211_STA_DISABLE_40MHZ |
428 IEEE80211_STA_DISABLE_80P80MHZ |
429 IEEE80211_STA_DISABLE_160MHZ)) ||
430 !cfg80211_chandef_valid(&chandef)) {
431 sdata_info(sdata,
432 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
433 ifmgd->bssid);
434 return -EINVAL;
435 }
436
437 switch (chandef.width) {
438 case NL80211_CHAN_WIDTH_20_NOHT:
439 case NL80211_CHAN_WIDTH_20:
440 new_sta_bw = IEEE80211_STA_RX_BW_20;
441 break;
4bf88530 442 case NL80211_CHAN_WIDTH_40:
30eb1dc2 443 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 444 break;
30eb1dc2
JB		 445 case NL80211_CHAN_WIDTH_80:
446 new_sta_bw = IEEE80211_STA_RX_BW_80;
447 break;
448 case NL80211_CHAN_WIDTH_80P80:
449 case NL80211_CHAN_WIDTH_160:
450 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 451 break;
30eb1dc2
JB		 452 default:
453 return -EINVAL;
64f68e5d 454 }
d5522e03 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->cur_max_bandwidth)
457 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 458
30eb1dc2
JB		 459 if (new_sta_bw < sta->sta.bandwidth) {
460 sta->sta.bandwidth = new_sta_bw;
461 rate_control_rate_update(local, sband, sta,
462 IEEE80211_RC_BW_CHANGED);
463 }
64f68e5d 464
30eb1dc2
JB		 465 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
466 if (ret) {
467 sdata_info(sdata,
468 "AP %pM changed bandwidth to incompatible one - disconnect\n",
469 ifmgd->bssid);
470 return ret;
471 }
7cc44ed4 472
30eb1dc2
JB		 473 if (new_sta_bw > sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
0aaffa9b 477 }
d5522e03 478
074d46d1 479 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 480
481 /* if bss configuration changed store the new one */
30eb1dc2
JB		 482 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
483 *changed |= BSS_CHANGED_HT;
9ed6bcce 484 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 485 }
486
30eb1dc2 487 return 0;
d5522e03
JB		 488}
489
9c6bd790
JB		 490/* frame sending functions */
491
66e67e41 492static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 493 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 494 struct ieee80211_supported_band *sband,
495 struct ieee80211_channel *channel,
496 enum ieee80211_smps_mode smps)
497{
66e67e41
JB		 498 u8 *pos;
499 u32 flags = channel->flags;
500 u16 cap;
501 struct ieee80211_sta_ht_cap ht_cap;
502
503 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
504
66e67e41
JB		 505 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
506 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
507
66e67e41
JB		 508 /* determine capability flags */
509 cap = ht_cap.cap;
510
9dde6423 511 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 512 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
513 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
515 cap &= ~IEEE80211_HT_CAP_SGI_40;
516 }
517 break;
518 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
519 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
520 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
521 cap &= ~IEEE80211_HT_CAP_SGI_40;
522 }
523 break;
524 }
525
24398e39
JB		 526 /*
527 * If 40 MHz was disabled associate as though we weren't
528 * capable of 40 MHz -- some broken APs will never fall
529 * back to trying to transmit in 20 MHz.
530 */
531 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
532 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
533 cap &= ~IEEE80211_HT_CAP_SGI_40;
534 }
535
66e67e41
JB		 536 /* set SM PS mode properly */
537 cap &= ~IEEE80211_HT_CAP_SM_PS;
538 switch (smps) {
539 case IEEE80211_SMPS_AUTOMATIC:
540 case IEEE80211_SMPS_NUM_MODES:
541 WARN_ON(1);
542 case IEEE80211_SMPS_OFF:
543 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
544 IEEE80211_HT_CAP_SM_PS_SHIFT;
545 break;
546 case IEEE80211_SMPS_STATIC:
547 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
548 IEEE80211_HT_CAP_SM_PS_SHIFT;
549 break;
550 case IEEE80211_SMPS_DYNAMIC:
551 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
552 IEEE80211_HT_CAP_SM_PS_SHIFT;
553 break;
554 }
555
556 /* reserve and fill IE */
557 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
558 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
559}
560
d545daba
MP		 561static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
562 struct sk_buff *skb,
b08fbbd8
JB		 563 struct ieee80211_supported_band *sband,
564 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 565{
566 u8 *pos;
567 u32 cap;
568 struct ieee80211_sta_vht_cap vht_cap;
569
570 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
571
572 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 573 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 574
575 /* determine capability flags */
576 cap = vht_cap.cap;
577
f2d9d270
JB		 578 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
579 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
580 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
581 }
582
583 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
584 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
585 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
586 }
587
b08fbbd8
JB		 588 /*
589 * Some APs apparently get confused if our capabilities are better
590 * than theirs, so restrict what we advertise in the assoc request.
591 */
592 if (!(ap_vht_cap->vht_cap_info &
593 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
594 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
595
d545daba 596 /* reserve and fill IE */
d4950281 597 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 598 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
599}
600
66e67e41
JB		 601static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
602{
603 struct ieee80211_local *local = sdata->local;
604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
605 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
606 struct sk_buff *skb;
607 struct ieee80211_mgmt *mgmt;
608 u8 *pos, qos_info;
609 size_t offset = 0, noffset;
2103dec1 610 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 611 u16 capab;
612 struct ieee80211_supported_band *sband;
55de908a
JB		 613 struct ieee80211_chanctx_conf *chanctx_conf;
614 struct ieee80211_channel *chan;
2103dec1 615 u32 rate_flags, rates = 0;
66e67e41 616
8d61ffa5 617 sdata_assert_lock(sdata);
66e67e41 618
55de908a
JB		 619 rcu_read_lock();
620 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
621 if (WARN_ON(!chanctx_conf)) {
622 rcu_read_unlock();
623 return;
624 }
4bf88530 625 chan = chanctx_conf->def.chan;
2103dec1 626 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 627 rcu_read_unlock();
628 sband = local->hw.wiphy->bands[chan->band];
2103dec1 629 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 630
631 if (assoc_data->supp_rates_len) {
632 /*
633 * Get all rates supported by the device and the AP as
634 * some APs don't like getting a superset of their rates
635 * in the association request (e.g. D-Link DAP 1353 in
636 * b-only mode)...
637 */
2103dec1
SW		 638 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
639 assoc_data->supp_rates,
640 assoc_data->supp_rates_len,
641 &rates);
66e67e41
JB		 642 } else {
643 /*
644 * In case AP not provide any supported rates information
645 * before association, we send information element(s) with
646 * all rates that we support.
647 */
2103dec1
SW		 648 rates_len = 0;
649 for (i = 0; i < sband->n_bitrates; i++) {
650 if ((rate_flags & sband->bitrates[i].flags)
651 != rate_flags)
652 continue;
653 rates |= BIT(i);
654 rates_len++;
655 }
66e67e41
JB		 656 }
657
658 skb = alloc_skb(local->hw.extra_tx_headroom +
659 sizeof(*mgmt) + /* bit too much but doesn't matter */
660 2 + assoc_data->ssid_len + /* SSID */
661 4 + rates_len + /* (extended) rates */
662 4 + /* power capability */
663 2 + 2 * sband->n_channels + /* supported channels */
664 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 665 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 666 assoc_data->ie_len + /* extra IEs */
667 9, /* WMM */
668 GFP_KERNEL);
669 if (!skb)
670 return;
671
672 skb_reserve(skb, local->hw.extra_tx_headroom);
673
674 capab = WLAN_CAPABILITY_ESS;
675
676 if (sband->band == IEEE80211_BAND_2GHZ) {
677 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
678 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
679 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
680 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
681 }
682
683 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
684 capab |= WLAN_CAPABILITY_PRIVACY;
685
686 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
687 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
688 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
689
690 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
691 memset(mgmt, 0, 24);
692 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
693 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
694 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
695
696 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
697 skb_put(skb, 10);
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_REASSOC_REQ);
700 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.reassoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
704 ETH_ALEN);
705 } else {
706 skb_put(skb, 4);
707 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
708 IEEE80211_STYPE_ASSOC_REQ);
709 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
710 mgmt->u.assoc_req.listen_interval =
711 cpu_to_le16(local->hw.conf.listen_interval);
712 }
713
714 /* SSID */
715 pos = skb_put(skb, 2 + assoc_data->ssid_len);
716 *pos++ = WLAN_EID_SSID;
717 *pos++ = assoc_data->ssid_len;
718 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
719
720 /* add all rates which were marked to be used above */
721 supp_rates_len = rates_len;
722 if (supp_rates_len > 8)
723 supp_rates_len = 8;
724
725 pos = skb_put(skb, supp_rates_len + 2);
726 *pos++ = WLAN_EID_SUPP_RATES;
727 *pos++ = supp_rates_len;
728
729 count = 0;
730 for (i = 0; i < sband->n_bitrates; i++) {
731 if (BIT(i) & rates) {
2103dec1
SW		 732 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
733 5 * (1 << shift));
734 *pos++ = (u8) rate;
66e67e41
JB		 735 if (++count == 8)
736 break;
737 }
738 }
739
740 if (rates_len > count) {
741 pos = skb_put(skb, rates_len - count + 2);
742 *pos++ = WLAN_EID_EXT_SUPP_RATES;
743 *pos++ = rates_len - count;
744
745 for (i++; i < sband->n_bitrates; i++) {
746 if (BIT(i) & rates) {
2103dec1
SW		 747 int rate;
748 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
749 5 * (1 << shift));
750 *pos++ = (u8) rate;
66e67e41
JB		 751 }
752 }
753 }
754
755 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
756 /* 1. power capabilities */
757 pos = skb_put(skb, 4);
758 *pos++ = WLAN_EID_PWR_CAPABILITY;
759 *pos++ = 2;
760 *pos++ = 0; /* min tx power */
0430c883
SW		 761 /* max tx power */
762 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
66e67e41
JB		 763
764 /* 2. supported channels */
765 /* TODO: get this in reg domain format */
766 pos = skb_put(skb, 2 * sband->n_channels + 2);
767 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
768 *pos++ = 2 * sband->n_channels;
769 for (i = 0; i < sband->n_channels; i++) {
770 *pos++ = ieee80211_frequency_to_channel(
771 sband->channels[i].center_freq);
772 *pos++ = 1; /* one channel in the subband*/
773 }
774 }
775
776 /* if present, add any custom IEs that go before HT */
777 if (assoc_data->ie_len && assoc_data->ie) {
778 static const u8 before_ht[] = {
779 WLAN_EID_SSID,
780 WLAN_EID_SUPP_RATES,
781 WLAN_EID_EXT_SUPP_RATES,
782 WLAN_EID_PWR_CAPABILITY,
783 WLAN_EID_SUPPORTED_CHANNELS,
784 WLAN_EID_RSN,
785 WLAN_EID_QOS_CAPA,
786 WLAN_EID_RRM_ENABLED_CAPABILITIES,
787 WLAN_EID_MOBILITY_DOMAIN,
788 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
789 };
790 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
791 before_ht, ARRAY_SIZE(before_ht),
792 offset);
793 pos = skb_put(skb, noffset - offset);
794 memcpy(pos, assoc_data->ie + offset, noffset - offset);
795 offset = noffset;
796 }
797
f2d9d270
JB		 798 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
799 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
800 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
801
a8243b72 802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 803 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 804 sband, chan, sdata->smps_mode);
66e67e41 805
d545daba 806 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 807 ieee80211_add_vht_ie(sdata, skb, sband,
808 &assoc_data->ap_vht_cap);
d545daba 809
66e67e41
JB		 810 /* if present, add any custom non-vendor IEs that go after HT */
811 if (assoc_data->ie_len && assoc_data->ie) {
812 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
813 assoc_data->ie_len,
814 offset);
815 pos = skb_put(skb, noffset - offset);
816 memcpy(pos, assoc_data->ie + offset, noffset - offset);
817 offset = noffset;
818 }
819
76f0303d
JB		 820 if (assoc_data->wmm) {
821 if (assoc_data->uapsd) {
dc41e4d4
EP		 822 qos_info = ifmgd->uapsd_queues;
823 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 824 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
825 } else {
826 qos_info = 0;
827 }
828
829 pos = skb_put(skb, 9);
830 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
831 *pos++ = 7; /* len */
832 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
833 *pos++ = 0x50;
834 *pos++ = 0xf2;
835 *pos++ = 2; /* WME */
836 *pos++ = 0; /* WME info */
837 *pos++ = 1; /* WME ver */
838 *pos++ = qos_info;
839 }
840
841 /* add any remaining custom (i.e. vendor specific here) IEs */
842 if (assoc_data->ie_len && assoc_data->ie) {
843 noffset = assoc_data->ie_len;
844 pos = skb_put(skb, noffset - offset);
845 memcpy(pos, assoc_data->ie + offset, noffset - offset);
846 }
847
a1845fc7
JB		 848 drv_mgd_prepare_tx(local, sdata);
849
66e67e41 850 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 851 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
852 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
853 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 854 ieee80211_tx_skb(sdata, skb);
855}
856
572e0012
KV		 857void ieee80211_send_pspoll(struct ieee80211_local *local,
858 struct ieee80211_sub_if_data *sdata)
859{
572e0012
KV		 860 struct ieee80211_pspoll *pspoll;
861 struct sk_buff *skb;
572e0012 862
d8cd189e
KV		 863 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
864 if (!skb)
572e0012 865 return;
572e0012 866
d8cd189e
KV		 867 pspoll = (struct ieee80211_pspoll *) skb->data;
868 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 869
62ae67be
JB		 870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
871 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 872}
873
965bedad
JB		 874void ieee80211_send_nullfunc(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata,
876 int powersave)
877{
878 struct sk_buff *skb;
d8cd189e 879 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 881
d8cd189e
KV		 882 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
883 if (!skb)
965bedad 884 return;
965bedad 885
d8cd189e 886 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 887 if (powersave)
d8cd189e 888 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 889
6c17b77b
SF		 890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
891 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 892
893 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
895
b6f35301
RM		 896 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
897 IEEE80211_STA_CONNECTION_POLL))
898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
899
62ae67be 900 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 901}
902
d524215f
FF		 903static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
904 struct ieee80211_sub_if_data *sdata)
905{
906 struct sk_buff *skb;
907 struct ieee80211_hdr *nullfunc;
908 __le16 fc;
909
910 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
911 return;
912
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 914 if (!skb)
d524215f 915 return;
d15b8459 916
d524215f
FF		 917 skb_reserve(skb, local->hw.extra_tx_headroom);
918
919 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
920 memset(nullfunc, 0, 30);
921 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
922 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
923 nullfunc->frame_control = fc;
924 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
925 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
926 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
927 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
928
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
930 ieee80211_tx_skb(sdata, skb);
931}
932
cc32abd4
JB		 933/* spectrum management related things */
934static void ieee80211_chswitch_work(struct work_struct *work)
935{
936 struct ieee80211_sub_if_data *sdata =
937 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 938 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
940
9607e6b6 941 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 942 return;
943
8d61ffa5 944 sdata_lock(sdata);
77fdaa12
JB		 945 if (!ifmgd->associated)
946 goto out;
cc32abd4 947
85220d71 948 local->_oper_chandef = local->csa_chandef;
675a0b04
KB		 949
950 if (!local->ops->channel_switch) {
5ce6e438 951 /* call "hw_config" only if doing sw channel switch */
675a0b04 952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 953 } else {
954 /* update the device channel directly */
675a0b04 955 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 956 }
77fdaa12 957
cc32abd4 958 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 959 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 960
57eebdf3 961 /* XXX: wait for a beacon first? */
675a0b04 962 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 963 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 964 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 965 out:
966 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
8d61ffa5 967 sdata_unlock(sdata);
cc32abd4
JB		 968}
969
5ce6e438
JB		 970void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
971{
55de908a
JB		 972 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 974
975 trace_api_chswitch_done(sdata, success);
976 if (!success) {
882a7c69
JB		 977 sdata_info(sdata,
978 "driver channel switch failed, disconnecting\n");
979 ieee80211_queue_work(&sdata->local->hw,
980 &ifmgd->csa_connection_drop_work);
981 } else {
982 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 983 }
5ce6e438
JB		 984}
985EXPORT_SYMBOL(ieee80211_chswitch_done);
986
cc32abd4
JB		 987static void ieee80211_chswitch_timer(unsigned long data)
988{
989 struct ieee80211_sub_if_data *sdata =
990 (struct ieee80211_sub_if_data *) data;
5bb644a0 991
9b7d72c1 992 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 993}
994
37799e52 995static void
4a3cb702 996ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 997 u64 timestamp, struct ieee802_11_elems *elems,
998 bool beacon)
cc32abd4 999{
b4f286a1 1000 struct ieee80211_local *local = sdata->local;
cc32abd4 1001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52
JB		 1002 struct cfg80211_bss *cbss = ifmgd->associated;
1003 struct ieee80211_bss *bss;
55de908a 1004 struct ieee80211_chanctx *chanctx;
b4f286a1
JB		 1005 enum ieee80211_band new_band;
1006 int new_freq;
1007 u8 new_chan_no;
1008 u8 count;
1009 u8 mode;
cd64f2a9 1010 struct ieee80211_channel *new_chan;
85220d71 1011 struct cfg80211_chan_def new_chandef = {};
cd64f2a9
JB		 1012 struct cfg80211_chan_def new_vht_chandef = {};
1013 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1014 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
04a161f4 1015 const struct ieee80211_ht_operation *ht_oper;
85220d71 1016 int secondary_channel_offset = -1;
cc32abd4 1017
8d61ffa5 1018 sdata_assert_lock(sdata);
77fdaa12 1019
37799e52 1020 if (!cbss)
cc32abd4
JB		 1021 return;
1022
b4f286a1 1023 if (local->scanning)
cc32abd4
JB		 1024 return;
1025
37799e52 1026 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1027 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1028 return;
1029
cd64f2a9
JB		 1030 sec_chan_offs = elems->sec_chan_offs;
1031 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
04a161f4 1032 ht_oper = elems->ht_operation;
cd64f2a9
JB		 1033
1034 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1035 IEEE80211_STA_DISABLE_40MHZ)) {
1036 sec_chan_offs = NULL;
1037 wide_bw_chansw_ie = NULL;
04a161f4
JB		 1038 /* only used for bandwidth here */
1039 ht_oper = NULL;
85220d71
JB		 1040 }
1041
cd64f2a9
JB		 1042 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1043 wide_bw_chansw_ie = NULL;
85220d71 1044
b4f286a1
JB		 1045 if (elems->ext_chansw_ie) {
1046 if (!ieee80211_operating_class_to_band(
1047 elems->ext_chansw_ie->new_operating_class,
1048 &new_band)) {
1049 sdata_info(sdata,
1050 "cannot understand ECSA IE operating class %d, disconnecting\n",
1051 elems->ext_chansw_ie->new_operating_class);
1052 ieee80211_queue_work(&local->hw,
1053 &ifmgd->csa_connection_drop_work);
1054 }
1055 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1056 count = elems->ext_chansw_ie->count;
1057 mode = elems->ext_chansw_ie->mode;
1058 } else if (elems->ch_switch_ie) {
1059 new_band = cbss->channel->band;
1060 new_chan_no = elems->ch_switch_ie->new_ch_num;
1061 count = elems->ch_switch_ie->count;
1062 mode = elems->ch_switch_ie->mode;
1063 } else {
1064 /* nothing here we understand */
37799e52 1065 return;
b4f286a1 1066 }
37799e52
JB		 1067
1068 bss = (void *)cbss->priv;
1069
b4f286a1 1070 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
cd64f2a9
JB		 1071 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1072 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
882a7c69
JB		 1073 sdata_info(sdata,
1074 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1075 ifmgd->associated->bssid, new_freq);
b4f286a1 1076 ieee80211_queue_work(&local->hw,
882a7c69 1077 &ifmgd->csa_connection_drop_work);
cc32abd4 1078 return;
882a7c69 1079 }
cc32abd4 1080
04a161f4 1081 if (!beacon && sec_chan_offs) {
cd64f2a9 1082 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
04a161f4
JB		 1083 } else if (beacon && ht_oper) {
1084 secondary_channel_offset =
1085 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
cd64f2a9 1086 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
04a161f4
JB		 1087 /*
1088 * If it's not a beacon, HT is enabled and the IE not present,
1089 * it's 20 MHz, 802.11-2012 8.5.2.6:
1090 * This element [the Secondary Channel Offset Element] is
1091 * present when switching to a 40 MHz channel. It may be
1092 * present when switching to a 20 MHz channel (in which
1093 * case the secondary channel offset is set to SCN).
1094 */
cd64f2a9
JB		 1095 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1096 }
1097
85220d71
JB		 1098 switch (secondary_channel_offset) {
1099 default:
1100 /* secondary_channel_offset was present but is invalid */
1101 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
cd64f2a9 1102 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1103 NL80211_CHAN_HT20);
1104 break;
1105 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
cd64f2a9 1106 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1107 NL80211_CHAN_HT40PLUS);
1108 break;
1109 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
cd64f2a9 1110 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1111 NL80211_CHAN_HT40MINUS);
1112 break;
1113 case -1:
cd64f2a9 1114 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71 1115 NL80211_CHAN_NO_HT);
ab1e8ad3
SW		 1116 /* keep width for 5/10 MHz channels */
1117 switch (sdata->vif.bss_conf.chandef.width) {
1118 case NL80211_CHAN_WIDTH_5:
1119 case NL80211_CHAN_WIDTH_10:
1120 new_chandef.width = sdata->vif.bss_conf.chandef.width;
1121 break;
1122 default:
1123 break;
1124 }
85220d71
JB		 1125 break;
1126 }
1127
cd64f2a9
JB		 1128 if (wide_bw_chansw_ie) {
1129 new_vht_chandef.chan = new_chan;
1130 new_vht_chandef.center_freq1 =
1131 ieee80211_channel_to_frequency(
1132 wide_bw_chansw_ie->new_center_freq_seg0,
1133 new_band);
1134
1135 switch (wide_bw_chansw_ie->new_channel_width) {
1136 default:
1137 /* hmmm, ignore VHT and use HT if present */
1138 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1139 new_vht_chandef.chan = NULL;
1140 break;
1141 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1142 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1143 break;
1144 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1145 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1146 break;
1147 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1148 /* field is otherwise reserved */
1149 new_vht_chandef.center_freq2 =
1150 ieee80211_channel_to_frequency(
1151 wide_bw_chansw_ie->new_center_freq_seg1,
1152 new_band);
1153 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1154 break;
1155 }
1156 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1157 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1158 chandef_downgrade(&new_vht_chandef);
1159 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1160 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1161 chandef_downgrade(&new_vht_chandef);
1162 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1163 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1164 chandef_downgrade(&new_vht_chandef);
1165 }
1166
1167 /* if VHT data is there validate & use it */
1168 if (new_vht_chandef.chan) {
1169 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1170 &new_chandef)) {
1171 sdata_info(sdata,
1172 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1173 ifmgd->associated->bssid);
1174 ieee80211_queue_work(&local->hw,
1175 &ifmgd->csa_connection_drop_work);
1176 return;
1177 }
1178 new_chandef = new_vht_chandef;
1179 }
1180
85220d71
JB		 1181 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1182 IEEE80211_CHAN_DISABLED)) {
1183 sdata_info(sdata,
1184 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1185 ifmgd->associated->bssid, new_freq,
1186 new_chandef.width, new_chandef.center_freq1,
1187 new_chandef.center_freq2);
1188 ieee80211_queue_work(&local->hw,
1189 &ifmgd->csa_connection_drop_work);
1190 return;
1191 }
1192
57eebdf3
JB		 1193 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1194
b4f286a1 1195 if (local->use_chanctx) {
55de908a
JB		 1196 sdata_info(sdata,
1197 "not handling channel switch with channel contexts\n");
b4f286a1 1198 ieee80211_queue_work(&local->hw,
55de908a 1199 &ifmgd->csa_connection_drop_work);
246dc3fd 1200 return;
55de908a
JB		 1201 }
1202
b4f286a1 1203 mutex_lock(&local->chanctx_mtx);
55de908a 1204 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
b4f286a1 1205 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1206 return;
1207 }
1208 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1209 struct ieee80211_chanctx, conf);
1210 if (chanctx->refcount > 1) {
1211 sdata_info(sdata,
1212 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1213 ieee80211_queue_work(&local->hw,
55de908a 1214 &ifmgd->csa_connection_drop_work);
b4f286a1 1215 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1216 return;
1217 }
b4f286a1 1218 mutex_unlock(&local->chanctx_mtx);
55de908a 1219
85220d71 1220 local->csa_chandef = new_chandef;
55de908a 1221
b4f286a1
JB		 1222 if (mode)
1223 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1224 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1225 IEEE80211_QUEUE_STOP_REASON_CSA);
1226
b4f286a1 1227 if (local->ops->channel_switch) {
5ce6e438 1228 /* use driver's channel switch callback */
57eebdf3
JB		 1229 struct ieee80211_channel_switch ch_switch = {
1230 .timestamp = timestamp,
b4f286a1 1231 .block_tx = mode,
85220d71 1232 .chandef = new_chandef,
b4f286a1 1233 .count = count,
57eebdf3
JB		 1234 };
1235
b4f286a1 1236 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1237 return;
1238 }
1239
1240 /* channel switch handled in software */
b4f286a1
JB		 1241 if (count <= 1)
1242 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1243 else
cc32abd4 1244 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1245 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1246}
1247
1ea6f9c0
JB		 1248static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1249 struct ieee80211_channel *channel,
1250 const u8 *country_ie, u8 country_ie_len,
1251 const u8 *pwr_constr_elem)
cc32abd4 1252{
04b7b2ff
JB		 1253 struct ieee80211_country_ie_triplet *triplet;
1254 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1255 int i, chan_pwr, chan_increment, new_ap_level;
1256 bool have_chan_pwr = false;
cc32abd4 1257
04b7b2ff
JB		 1258 /* Invalid IE */
1259 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1260 return 0;
cc32abd4 1261
04b7b2ff
JB		 1262 triplet = (void *)(country_ie + 3);
1263 country_ie_len -= 3;
1264
1265 switch (channel->band) {
1266 default:
1267 WARN_ON_ONCE(1);
1268 /* fall through */
1269 case IEEE80211_BAND_2GHZ:
1270 case IEEE80211_BAND_60GHZ:
1271 chan_increment = 1;
1272 break;
1273 case IEEE80211_BAND_5GHZ:
1274 chan_increment = 4;
1275 break;
cc32abd4 1276 }
04b7b2ff
JB		 1277
1278 /* find channel */
1279 while (country_ie_len >= 3) {
1280 u8 first_channel = triplet->chans.first_channel;
1281
1282 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1283 goto next;
1284
1285 for (i = 0; i < triplet->chans.num_channels; i++) {
1286 if (first_channel + i * chan_increment == chan) {
1287 have_chan_pwr = true;
1288 chan_pwr = triplet->chans.max_power;
1289 break;
1290 }
1291 }
1292 if (have_chan_pwr)
1293 break;
1294
1295 next:
1296 triplet++;
1297 country_ie_len -= 3;
1298 }
1299
1300 if (!have_chan_pwr)
1ea6f9c0 1301 return 0;
04b7b2ff
JB		 1302
1303 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1304
1ea6f9c0
JB		 1305 if (sdata->ap_power_level == new_ap_level)
1306 return 0;
04b7b2ff
JB		 1307
1308 sdata_info(sdata,
1309 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1310 new_ap_level, chan_pwr, *pwr_constr_elem,
1311 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1312 sdata->ap_power_level = new_ap_level;
1313 if (__ieee80211_recalc_txpower(sdata))
1314 return BSS_CHANGED_TXPOWER;
1315 return 0;
cc32abd4
JB		 1316}
1317
965bedad
JB		 1318/* powersave */
1319static void ieee80211_enable_ps(struct ieee80211_local *local,
1320 struct ieee80211_sub_if_data *sdata)
1321{
1322 struct ieee80211_conf *conf = &local->hw.conf;
1323
d5edaedc
JB		 1324 /*
1325 * If we are scanning right now then the parameters will
1326 * take effect when scan finishes.
1327 */
fbe9c429 1328 if (local->scanning)
d5edaedc
JB		 1329 return;
1330
965bedad
JB		 1331 if (conf->dynamic_ps_timeout > 0 &&
1332 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1333 mod_timer(&local->dynamic_ps_timer, jiffies +
1334 msecs_to_jiffies(conf->dynamic_ps_timeout));
1335 } else {
1336 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1337 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1338
2a13052f
JO		 1339 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1340 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1341 return;
1342
1343 conf->flags |= IEEE80211_CONF_PS;
1344 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1345 }
1346}
1347
1348static void ieee80211_change_ps(struct ieee80211_local *local)
1349{
1350 struct ieee80211_conf *conf = &local->hw.conf;
1351
1352 if (local->ps_sdata) {
965bedad
JB		 1353 ieee80211_enable_ps(local, local->ps_sdata);
1354 } else if (conf->flags & IEEE80211_CONF_PS) {
1355 conf->flags &= ~IEEE80211_CONF_PS;
1356 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1357 del_timer_sync(&local->dynamic_ps_timer);
1358 cancel_work_sync(&local->dynamic_ps_enable_work);
1359 }
1360}
1361
808118cb
JY		 1362static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1363{
1364 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1365 struct sta_info *sta = NULL;
c2c98fde 1366 bool authorized = false;
808118cb
JY		 1367
1368 if (!mgd->powersave)
1369 return false;
1370
05cb9108
JB		 1371 if (mgd->broken_ap)
1372 return false;
1373
808118cb
JY		 1374 if (!mgd->associated)
1375 return false;
1376
808118cb
JY		 1377 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1378 IEEE80211_STA_CONNECTION_POLL))
1379 return false;
1380
989c6505 1381 if (!mgd->have_beacon)
ce857888
AB		 1382 return false;
1383
808118cb
JY		 1384 rcu_read_lock();
1385 sta = sta_info_get(sdata, mgd->bssid);
1386 if (sta)
c2c98fde 1387 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1388 rcu_read_unlock();
1389
c2c98fde 1390 return authorized;
808118cb
JY		 1391}
1392
965bedad 1393/* need to hold RTNL or interface lock */
10f644a4 1394void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1395{
1396 struct ieee80211_sub_if_data *sdata, *found = NULL;
1397 int count = 0;
195e294d 1398 int timeout;
965bedad
JB		 1399
1400 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1401 local->ps_sdata = NULL;
1402 return;
1403 }
1404
1405 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1406 if (!ieee80211_sdata_running(sdata))
965bedad 1407 continue;
8c7914de
RM		 1408 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1409 /* If an AP vif is found, then disable PS
1410 * by setting the count to zero thereby setting
1411 * ps_sdata to NULL.
1412 */
1413 count = 0;
1414 break;
1415 }
965bedad
JB		 1416 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1417 continue;
1418 found = sdata;
1419 count++;
1420 }
1421
808118cb 1422 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1423 s32 beaconint_us;
1424
1425 if (latency < 0)
ed77134b 1426 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1427
1428 beaconint_us = ieee80211_tu_to_usec(
1429 found->vif.bss_conf.beacon_int);
1430
ff616381 1431 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1432 if (timeout < 0) {
1433 /*
ff616381
JO		 1434 * Go to full PSM if the user configures a very low
1435 * latency requirement.
0ab82b04
EP		 1436 * The 2000 second value is there for compatibility
1437 * until the PM_QOS_NETWORK_LATENCY is configured
1438 * with real values.
195e294d 1439 */
0ab82b04
EP		 1440 if (latency > (1900 * USEC_PER_MSEC) &&
1441 latency != (2000 * USEC_PER_SEC))
195e294d 1442 timeout = 0;
ff616381
JO		 1443 else
1444 timeout = 100;
195e294d 1445 }
09b85568 1446 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1447
04fe2037 1448 if (beaconint_us > latency) {
10f644a4 1449 local->ps_sdata = NULL;
04fe2037 1450 } else {
04fe2037 1451 int maxslp = 1;
826262c3 1452 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1453
1454 /* If the TIM IE is invalid, pretend the value is 1 */
1455 if (!dtimper)
1456 dtimper = 1;
1457 else if (dtimper > 1)
04fe2037
JB		 1458 maxslp = min_t(int, dtimper,
1459 latency / beaconint_us);
1460
9ccebe61 1461 local->hw.conf.max_sleep_period = maxslp;
56007a02 1462 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1463 local->ps_sdata = found;
04fe2037 1464 }
10f644a4 1465 } else {
965bedad 1466 local->ps_sdata = NULL;
10f644a4 1467 }
965bedad
JB		 1468
1469 ieee80211_change_ps(local);
1470}
1471
ab095877
EP		 1472void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1473{
1474 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1475
1476 if (sdata->vif.bss_conf.ps != ps_allowed) {
1477 sdata->vif.bss_conf.ps = ps_allowed;
1478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1479 }
1480}
1481
965bedad
JB		 1482void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1483{
1484 struct ieee80211_local *local =
1485 container_of(work, struct ieee80211_local,
1486 dynamic_ps_disable_work);
1487
1488 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1489 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1490 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1491 }
1492
1493 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1494 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1495 IEEE80211_QUEUE_STOP_REASON_PS);
1496}
1497
1498void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1499{
1500 struct ieee80211_local *local =
1501 container_of(work, struct ieee80211_local,
1502 dynamic_ps_enable_work);
1503 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1504 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1505 unsigned long flags;
1506 int q;
965bedad
JB		 1507
1508 /* can only happen when PS was just disabled anyway */
1509 if (!sdata)
1510 return;
1511
5e34069c
CL		 1512 ifmgd = &sdata->u.mgd;
1513
965bedad
JB		 1514 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1515 return;
1516
09b85568 1517 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1518 /* don't enter PS if TX frames are pending */
1519 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1520 mod_timer(&local->dynamic_ps_timer, jiffies +
1521 msecs_to_jiffies(
1522 local->hw.conf.dynamic_ps_timeout));
1523 return;
1524 }
77b7023a
AN		 1525
1526 /*
1527 * transmission can be stopped by others which leads to
1528 * dynamic_ps_timer expiry. Postpone the ps timer if it
1529 * is not the actual idle state.
1530 */
1531 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1532 for (q = 0; q < local->hw.queues; q++) {
1533 if (local->queue_stop_reasons[q]) {
1534 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1535 flags);
1536 mod_timer(&local->dynamic_ps_timer, jiffies +
1537 msecs_to_jiffies(
1538 local->hw.conf.dynamic_ps_timeout));
1539 return;
1540 }
1541 }
1542 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1543 }
1ddc2867 1544
375177bf 1545 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1546 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1547 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1548 mod_timer(&local->dynamic_ps_timer, jiffies +
1549 msecs_to_jiffies(
1550 local->hw.conf.dynamic_ps_timeout));
a1598383 1551 } else {
e8306f98
VN		 1552 ieee80211_send_nullfunc(local, sdata, 1);
1553 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1554 ieee80211_flush_queues(local, sdata);
e8306f98 1555 }
f3e85b9e
VN		 1556 }
1557
2a13052f
JO		 1558 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1559 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1560 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1561 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1562 local->hw.conf.flags |= IEEE80211_CONF_PS;
1563 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1564 }
965bedad
JB		 1565}
1566
1567void ieee80211_dynamic_ps_timer(unsigned long data)
1568{
1569 struct ieee80211_local *local = (void *) data;
1570
78f1a8b7 1571 if (local->quiescing || local->suspended)
5bb644a0
JB		 1572 return;
1573
42935eca 1574 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1575}
1576
164eb02d
SW		 1577void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1578{
1579 struct delayed_work *delayed_work =
1580 container_of(work, struct delayed_work, work);
1581 struct ieee80211_sub_if_data *sdata =
1582 container_of(delayed_work, struct ieee80211_sub_if_data,
1583 dfs_cac_timer_work);
1584
1585 ieee80211_vif_release_channel(sdata);
1586
1587 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1588}
1589
60f8b39c 1590/* MLME */
7d25745d 1591static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1592 struct ieee80211_sub_if_data *sdata,
4a3cb702 1593 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1594{
f0706e82 1595 struct ieee80211_tx_queue_params params;
4ced3f74 1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1597 size_t left;
1598 int count;
4a3cb702
JB		 1599 const u8 *pos;
1600 u8 uapsd_queues = 0;
f0706e82 1601
e1b3ec1a 1602 if (!local->ops->conf_tx)
7d25745d 1603 return false;
e1b3ec1a 1604
32c5057b 1605 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1606 return false;
3434fbd3
JB		 1607
1608 if (!wmm_param)
7d25745d 1609 return false;
3434fbd3 1610
f0706e82 1611 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1612 return false;
ab13315a
KV		 1613
1614 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1615 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1616
f0706e82 1617 count = wmm_param[6] & 0x0f;
46900298 1618 if (count == ifmgd->wmm_last_param_set)
7d25745d 1619 return false;
46900298 1620 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1621
1622 pos = wmm_param + 8;
1623 left = wmm_param_len - 8;
1624
1625 memset(&params, 0, sizeof(params));
1626
00e96dec 1627 sdata->wmm_acm = 0;
f0706e82
JB		 1628 for (; left >= 4; left -= 4, pos += 4) {
1629 int aci = (pos[0] >> 5) & 0x03;
1630 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1631 bool uapsd = false;
f0706e82
JB		 1632 int queue;
1633
1634 switch (aci) {
0eeb59fe 1635 case 1: /* AC_BK */
e100bb64 1636 queue = 3;
988c0f72 1637 if (acm)
00e96dec 1638 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1639 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1640 uapsd = true;
f0706e82 1641 break;
0eeb59fe 1642 case 2: /* AC_VI */
e100bb64 1643 queue = 1;
988c0f72 1644 if (acm)
00e96dec 1645 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1646 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1647 uapsd = true;
f0706e82 1648 break;
0eeb59fe 1649 case 3: /* AC_VO */
e100bb64 1650 queue = 0;
988c0f72 1651 if (acm)
00e96dec 1652 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1654 uapsd = true;
f0706e82 1655 break;
0eeb59fe 1656 case 0: /* AC_BE */
f0706e82 1657 default:
e100bb64 1658 queue = 2;
988c0f72 1659 if (acm)
00e96dec 1660 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1661 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1662 uapsd = true;
f0706e82
JB		 1663 break;
1664 }
1665
1666 params.aifs = pos[0] & 0x0f;
1667 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1668 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1669 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1670 params.acm = acm;
ab13315a
KV		 1671 params.uapsd = uapsd;
1672
bdcbd8e0
JB		 1673 mlme_dbg(sdata,
1674 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1675 queue, aci, acm,
1676 params.aifs, params.cw_min, params.cw_max,
1677 params.txop, params.uapsd);
f6f3def3
EP		 1678 sdata->tx_conf[queue] = params;
1679 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1680 sdata_err(sdata,
1681 "failed to set TX queue parameters for queue %d\n",
1682 queue);
f0706e82 1683 }
e1b3ec1a
SG		 1684
1685 /* enable WMM or activate new settings */
4ced3f74 1686 sdata->vif.bss_conf.qos = true;
7d25745d 1687 return true;
f0706e82
JB		 1688}
1689
925e64c3
SG		 1690static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1691{
1692 lockdep_assert_held(&sdata->local->mtx);
1693
1694 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1695 IEEE80211_STA_BEACON_POLL);
1696 ieee80211_run_deferred_scan(sdata->local);
1697}
1698
1699static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1700{
1701 mutex_lock(&sdata->local->mtx);
1702 __ieee80211_stop_poll(sdata);
1703 mutex_unlock(&sdata->local->mtx);
1704}
1705
7a5158ef
JB		 1706static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1707 u16 capab, bool erp_valid, u8 erp)
5628221c 1708{
bda3933a 1709 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1710 u32 changed = 0;
7a5158ef
JB		 1711 bool use_protection;
1712 bool use_short_preamble;
1713 bool use_short_slot;
1714
1715 if (erp_valid) {
1716 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1717 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1718 } else {
1719 use_protection = false;
1720 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1721 }
1722
1723 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1724 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1725 use_short_slot = true;
5628221c 1726
471b3efd 1727 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1728 bss_conf->use_cts_prot = use_protection;
1729 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1730 }
7e9ed188 1731
d43c7b37 1732 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1733 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1734 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1735 }
d9430a32 1736
7a5158ef 1737 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1738 bss_conf->use_short_slot = use_short_slot;
1739 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1740 }
1741
1742 return changed;
1743}
1744
f698d856 1745static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1746 struct cfg80211_bss *cbss,
ae5eb026 1747 u32 bss_info_changed)
f0706e82 1748{
0c1ad2ca 1749 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1750 struct ieee80211_local *local = sdata->local;
68542962 1751 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1752
ae5eb026 1753 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1754 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1755 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1756
7ccc8bd7 1757 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1758 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1759
0c1ad2ca
JB		 1760 sdata->u.mgd.associated = cbss;
1761 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1762
17e4ec14
JM		 1763 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1764
488dd7b5 1765 if (sdata->vif.p2p) {
9caf0364 1766 const struct cfg80211_bss_ies *ies;
488dd7b5 1767
9caf0364
JB		 1768 rcu_read_lock();
1769 ies = rcu_dereference(cbss->ies);
1770 if (ies) {
9caf0364
JB		 1771 int ret;
1772
1773 ret = cfg80211_get_p2p_attr(
1774 ies->data, ies->len,
1775 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1776 (u8 *) &bss_conf->p2p_noa_attr,
1777 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1778 if (ret >= 2) {
67baf663
JD		 1779 sdata->u.mgd.p2p_noa_index =
1780 bss_conf->p2p_noa_attr.index;
9caf0364 1781 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1782 }
488dd7b5 1783 }
9caf0364 1784 rcu_read_unlock();
488dd7b5
JB		 1785 }
1786
b291ba11 1787 /* just to be sure */
925e64c3 1788 ieee80211_stop_poll(sdata);
b291ba11 1789
9ac19a90 1790 ieee80211_led_assoc(local, 1);
9306102e 1791
989c6505 1792 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1793 /*
1794 * If the AP is buggy we may get here with no DTIM period
1795 * known, so assume it's 1 which is the only safe assumption
1796 * in that case, although if the TIM IE is broken powersave
1797 * probably just won't work at all.
1798 */
1799 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1800 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1801 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1802 } else {
817cee76 1803 bss_conf->beacon_rate = NULL;
e5b900d2 1804 bss_conf->dtim_period = 0;
826262c3 1805 }
e5b900d2 1806
68542962 1807 bss_conf->assoc = 1;
9cef8737 1808
a97c13c3 1809 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1810 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1811 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1812 bss_info_changed |= BSS_CHANGED_CQM;
1813
68542962 1814 /* Enable ARP filtering */
0f19b41e 1815 if (bss_conf->arp_addr_cnt)
68542962 1816 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1817
ae5eb026 1818 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1819
056508dc
JB		 1820 mutex_lock(&local->iflist_mtx);
1821 ieee80211_recalc_ps(local, -1);
1822 mutex_unlock(&local->iflist_mtx);
e0cb686f 1823
04ecd257 1824 ieee80211_recalc_smps(sdata);
ab095877
EP		 1825 ieee80211_recalc_ps_vif(sdata);
1826
9ac19a90 1827 netif_carrier_on(sdata->dev);
f0706e82
JB		 1828}
1829
e69e95db 1830static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1831 u16 stype, u16 reason, bool tx,
1832 u8 *frame_buf)
aa458d17 1833{
46900298 1834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1835 struct ieee80211_local *local = sdata->local;
3cc5240b 1836 u32 changed = 0;
aa458d17 1837
8d61ffa5 1838 sdata_assert_lock(sdata);
77fdaa12 1839
37ad3888
JB		 1840 if (WARN_ON_ONCE(tx && !frame_buf))
1841 return;
1842
b291ba11
JB		 1843 if (WARN_ON(!ifmgd->associated))
1844 return;
1845
79543d8e
DS		 1846 ieee80211_stop_poll(sdata);
1847
77fdaa12 1848 ifmgd->associated = NULL;
aa458d17
TW		 1849 netif_carrier_off(sdata->dev);
1850
88bc40e8
EP		 1851 /*
1852 * if we want to get out of ps before disassoc (why?) we have
1853 * to do it before sending disassoc, as otherwise the null-packet
1854 * won't be valid.
1855 */
1856 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1857 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1858 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1859 }
1860 local->ps_sdata = NULL;
1861
ab095877
EP		 1862 /* disable per-vif ps */
1863 ieee80211_recalc_ps_vif(sdata);
1864
f823981e
EP		 1865 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1866 if (tx)
39ecc01d 1867 ieee80211_flush_queues(local, sdata);
f823981e 1868
37ad3888
JB		 1869 /* deauthenticate/disassociate now */
1870 if (tx || frame_buf)
88a9e31c
EP		 1871 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1872 reason, tx, frame_buf);
37ad3888
JB		 1873
1874 /* flush out frame */
1875 if (tx)
39ecc01d 1876 ieee80211_flush_queues(local, sdata);
37ad3888 1877
88a9e31c
EP		 1878 /* clear bssid only after building the needed mgmt frames */
1879 memset(ifmgd->bssid, 0, ETH_ALEN);
1880
37ad3888 1881 /* remove AP and TDLS peers */
051007d9 1882 sta_info_flush_defer(sdata);
37ad3888
JB		 1883
1884 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1885 changed |= ieee80211_reset_erp_info(sdata);
1886
f5e5bf25 1887 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1888 changed |= BSS_CHANGED_ASSOC;
1889 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1890
67baf663
JD		 1891 ifmgd->p2p_noa_index = -1;
1892 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1893 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1894
dd5ecfea 1895 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1896 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1897 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1898 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1899 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1900
1ea6f9c0 1901 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1902
520eb820
KV		 1903 del_timer_sync(&local->dynamic_ps_timer);
1904 cancel_work_sync(&local->dynamic_ps_enable_work);
1905
68542962 1906 /* Disable ARP filtering */
0f19b41e 1907 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1908 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1909
3abead59
JB		 1910 sdata->vif.bss_conf.qos = false;
1911 changed |= BSS_CHANGED_QOS;
1912
0aaffa9b
JB		 1913 /* The BSSID (not really interesting) and HT changed */
1914 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1915 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1916
3abead59
JB		 1917 /* disassociated - set to defaults now */
1918 ieee80211_set_wmm_default(sdata, false);
1919
b9dcf712
JB		 1920 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1921 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1922 del_timer_sync(&sdata->u.mgd.timer);
1923 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1924
826262c3 1925 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1926 sdata->vif.bss_conf.beacon_rate = NULL;
1927
989c6505 1928 ifmgd->have_beacon = false;
826262c3 1929
028e8da0
JB		 1930 ifmgd->flags = 0;
1931 ieee80211_vif_release_channel(sdata);
aa458d17 1932}
f0706e82 1933
3cf335d5
KV		 1934void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1935 struct ieee80211_hdr *hdr)
1936{
1937 /*
1938 * We can postpone the mgd.timer whenever receiving unicast frames
1939 * from AP because we know that the connection is working both ways
1940 * at that time. But multicast frames (and hence also beacons) must
1941 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1942 * data idle periods for sending the periodic probe request to the
1943 * AP we're connected to.
3cf335d5 1944 */
b291ba11
JB		 1945 if (is_multicast_ether_addr(hdr->addr1))
1946 return;
1947
be099e82 1948 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1949}
f0706e82 1950
4e5ff376
FF		 1951static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1952{
1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1954 struct ieee80211_local *local = sdata->local;
4e5ff376 1955
133d40f9 1956 mutex_lock(&local->mtx);
4e5ff376 1957 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1958 IEEE80211_STA_CONNECTION_POLL))) {
1959 mutex_unlock(&local->mtx);
1960 return;
1961 }
4e5ff376 1962
925e64c3 1963 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1964
1965 mutex_lock(&local->iflist_mtx);
1966 ieee80211_recalc_ps(local, -1);
1967 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1968
1969 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1970 goto out;
4e5ff376
FF		 1971
1972 /*
1973 * We've received a probe response, but are not sure whether
1974 * we have or will be receiving any beacons or data, so let's
1975 * schedule the timers again, just in case.
1976 */
1977 ieee80211_sta_reset_beacon_monitor(sdata);
1978
1979 mod_timer(&ifmgd->conn_mon_timer,
1980 round_jiffies_up(jiffies +
1981 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1982out:
133d40f9 1983 mutex_unlock(&local->mtx);
4e5ff376
FF		 1984}
1985
1986void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1987 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1988{
75706d0e 1989 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1990 return;
1991
4e5ff376
FF		 1992 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1993 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1994 if (ack)
cab1c7fd 1995 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1996 else
1997 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1998 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1999 return;
4e5ff376 2000 }
cab1c7fd
WD		 2001
2002 if (ack)
2003 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2004}
2005
a43abf29
ML		 2006static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2007{
2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2009 const u8 *ssid;
f01a067d 2010 u8 *dst = ifmgd->associated->bssid;
180205bd 2011 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2012
2013 /*
2014 * Try sending broadcast probe requests for the last three
2015 * probe requests after the first ones failed since some
2016 * buggy APs only support broadcast probe requests.
2017 */
2018 if (ifmgd->probe_send_count >= unicast_limit)
2019 dst = NULL;
a43abf29 2020
4e5ff376
FF		 2021 /*
2022 * When the hardware reports an accurate Tx ACK status, it's
2023 * better to send a nullfunc frame instead of a probe request,
2024 * as it will kick us off the AP quickly if we aren't associated
2025 * anymore. The timeout will be reset if the frame is ACKed by
2026 * the AP.
2027 */
992e68bf
SD		 2028 ifmgd->probe_send_count++;
2029
04ac3c0e
FF		 2030 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2031 ifmgd->nullfunc_failed = false;
4e5ff376 2032 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2033 } else {
88c868c4
SG		 2034 int ssid_len;
2035
9caf0364 2036 rcu_read_lock();
4e5ff376 2037 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2038 if (WARN_ON_ONCE(ssid == NULL))
2039 ssid_len = 0;
2040 else
2041 ssid_len = ssid[1];
2042
2043 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2044 0, (u32) -1, true, 0,
55de908a 2045 ifmgd->associated->channel, false);
9caf0364 2046 rcu_read_unlock();
4e5ff376 2047 }
a43abf29 2048
180205bd 2049 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2050 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2051 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2052 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2053}
2054
b291ba11
JB		 2055static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2056 bool beacon)
04de8381 2057{
04de8381 2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2059 bool already = false;
34bfc411 2060
9607e6b6 2061 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2062 return;
2063
8d61ffa5 2064 sdata_lock(sdata);
77fdaa12
JB		 2065
2066 if (!ifmgd->associated)
2067 goto out;
2068
133d40f9
SG		 2069 mutex_lock(&sdata->local->mtx);
2070
2071 if (sdata->local->tmp_channel || sdata->local->scanning) {
2072 mutex_unlock(&sdata->local->mtx);
2073 goto out;
2074 }
2075
a13fbe54 2076 if (beacon) {
bdcbd8e0 2077 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2078 "detected beacon loss from AP (missed %d beacons) - probing\n",
2079 beacon_loss_count);
bdcbd8e0 2080
a13fbe54
BG		 2081 ieee80211_cqm_rssi_notify(&sdata->vif,
2082 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2083 GFP_KERNEL);
2084 }
04de8381 2085
b291ba11
JB		 2086 /*
2087 * The driver/our work has already reported this event or the
2088 * connection monitoring has kicked in and we have already sent
2089 * a probe request. Or maybe the AP died and the driver keeps
2090 * reporting until we disassociate...
2091 *
2092 * In either case we have to ignore the current call to this
2093 * function (except for setting the correct probe reason bit)
2094 * because otherwise we would reset the timer every time and
2095 * never check whether we received a probe response!
2096 */
2097 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2098 IEEE80211_STA_CONNECTION_POLL))
2099 already = true;
2100
2101 if (beacon)
2102 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2103 else
2104 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2105
133d40f9
SG		 2106 mutex_unlock(&sdata->local->mtx);
2107
b291ba11
JB		 2108 if (already)
2109 goto out;
2110
4e751843
JB		 2111 mutex_lock(&sdata->local->iflist_mtx);
2112 ieee80211_recalc_ps(sdata->local, -1);
2113 mutex_unlock(&sdata->local->iflist_mtx);
2114
a43abf29
ML		 2115 ifmgd->probe_send_count = 0;
2116 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2117 out:
8d61ffa5 2118 sdata_unlock(sdata);
04de8381
KV		 2119}
2120
a619a4c0
JO		 2121struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2122 struct ieee80211_vif *vif)
2123{
2124 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2126 struct cfg80211_bss *cbss;
a619a4c0
JO		 2127 struct sk_buff *skb;
2128 const u8 *ssid;
88c868c4 2129 int ssid_len;
a619a4c0
JO		 2130
2131 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2132 return NULL;
2133
8d61ffa5 2134 sdata_assert_lock(sdata);
a619a4c0 2135
d9b3b28b
EP		 2136 if (ifmgd->associated)
2137 cbss = ifmgd->associated;
2138 else if (ifmgd->auth_data)
2139 cbss = ifmgd->auth_data->bss;
2140 else if (ifmgd->assoc_data)
2141 cbss = ifmgd->assoc_data->bss;
2142 else
a619a4c0
JO		 2143 return NULL;
2144
9caf0364 2145 rcu_read_lock();
d9b3b28b 2146 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2147 if (WARN_ON_ONCE(ssid == NULL))
2148 ssid_len = 0;
2149 else
2150 ssid_len = ssid[1];
2151
d9b3b28b 2152 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2153 (u32) -1, cbss->channel,
6b77863b 2154 ssid + 2, ssid_len,
85a237fe 2155 NULL, 0, true);
9caf0364 2156 rcu_read_unlock();
a619a4c0
JO		 2157
2158 return skb;
2159}
2160EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2161
eef9e54c 2162static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2163{
2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2165 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2166
8d61ffa5 2167 sdata_lock(sdata);
1e4dcd01 2168 if (!ifmgd->associated) {
8d61ffa5 2169 sdata_unlock(sdata);
1e4dcd01
JO		 2170 return;
2171 }
2172
37ad3888
JB		 2173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2174 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2175 true, frame_buf);
882a7c69 2176 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2177 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2178 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2179 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 2180
6ff57cf8
JB		 2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2182 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2183 sdata_unlock(sdata);
1e4dcd01
JO		 2184}
2185
cc74c0c7 2186static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2187{
2188 struct ieee80211_sub_if_data *sdata =
2189 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2190 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct sta_info *sta;
2193
2194 if (ifmgd->associated) {
30fa9047 2195 rcu_read_lock();
a85e1d55
PS		 2196 sta = sta_info_get(sdata, ifmgd->bssid);
2197 if (sta)
2198 sta->beacon_loss_count++;
30fa9047 2199 rcu_read_unlock();
a85e1d55 2200 }
b291ba11 2201
682bd38b 2202 if (ifmgd->connection_loss) {
882a7c69
JB		 2203 sdata_info(sdata, "Connection to AP %pM lost\n",
2204 ifmgd->bssid);
eef9e54c 2205 __ieee80211_disconnect(sdata);
882a7c69 2206 } else {
1e4dcd01 2207 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2208 }
2209}
2210
2211static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2212{
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.csa_connection_drop_work);
2216
eef9e54c 2217 __ieee80211_disconnect(sdata);
b291ba11
JB		 2218}
2219
04de8381
KV		 2220void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2221{
2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2223 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2224
b5878a2d
JB		 2225 trace_api_beacon_loss(sdata);
2226
682bd38b 2227 sdata->u.mgd.connection_loss = false;
1e4dcd01 2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2229}
2230EXPORT_SYMBOL(ieee80211_beacon_loss);
2231
1e4dcd01
JO		 2232void ieee80211_connection_loss(struct ieee80211_vif *vif)
2233{
2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2235 struct ieee80211_hw *hw = &sdata->local->hw;
2236
b5878a2d
JB		 2237 trace_api_connection_loss(sdata);
2238
682bd38b 2239 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2241}
2242EXPORT_SYMBOL(ieee80211_connection_loss);
2243
2244
66e67e41
JB		 2245static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2246 bool assoc)
2247{
2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2249
8d61ffa5 2250 sdata_assert_lock(sdata);
66e67e41 2251
66e67e41
JB		 2252 if (!assoc) {
2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2254
2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2257 sdata->u.mgd.flags = 0;
55de908a 2258 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2259 }
2260
5b112d3d 2261 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2262 kfree(auth_data);
2263 sdata->u.mgd.auth_data = NULL;
2264}
2265
2266static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2267 struct ieee80211_mgmt *mgmt, size_t len)
2268{
1672c0e3 2269 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2270 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2271 u8 *pos;
2272 struct ieee802_11_elems elems;
1672c0e3 2273 u32 tx_flags = 0;
66e67e41
JB		 2274
2275 pos = mgmt->u.auth.variable;
b2e506bf 2276 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2277 if (!elems.challenge)
2278 return;
2279 auth_data->expected_transaction = 4;
a1845fc7 2280 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2281 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2282 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2283 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2284 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2285 elems.challenge - 2, elems.challenge_len + 2,
2286 auth_data->bss->bssid, auth_data->bss->bssid,
2287 auth_data->key, auth_data->key_len,
1672c0e3 2288 auth_data->key_idx, tx_flags);
66e67e41
JB		 2289}
2290
8d61ffa5
JB		 2291static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2292 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2293{
2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2295 u8 bssid[ETH_ALEN];
2296 u16 auth_alg, auth_transaction, status_code;
2297 struct sta_info *sta;
2298
8d61ffa5 2299 sdata_assert_lock(sdata);
66e67e41
JB		 2300
2301 if (len < 24 + 6)
8d61ffa5 2302 return;
66e67e41
JB		 2303
2304 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2305 return;
66e67e41
JB		 2306
2307 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2308
b203ca39 2309 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2310 return;
66e67e41
JB		 2311
2312 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2313 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2314 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2315
2316 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2317 auth_transaction != ifmgd->auth_data->expected_transaction) {
2318 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2319 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2320 auth_transaction,
2321 ifmgd->auth_data->expected_transaction);
8d61ffa5 2322 return;
0f4126e8 2323 }
66e67e41
JB		 2324
2325 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2326 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2327 mgmt->sa, status_code);
dac211ec 2328 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2329 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2330 return;
66e67e41
JB		 2331 }
2332
2333 switch (ifmgd->auth_data->algorithm) {
2334 case WLAN_AUTH_OPEN:
2335 case WLAN_AUTH_LEAP:
2336 case WLAN_AUTH_FT:
6b8ece3a 2337 case WLAN_AUTH_SAE:
66e67e41
JB		 2338 break;
2339 case WLAN_AUTH_SHARED_KEY:
2340 if (ifmgd->auth_data->expected_transaction != 4) {
2341 ieee80211_auth_challenge(sdata, mgmt, len);
2342 /* need another frame */
8d61ffa5 2343 return;
66e67e41
JB		 2344 }
2345 break;
2346 default:
2347 WARN_ONCE(1, "invalid auth alg %d",
2348 ifmgd->auth_data->algorithm);
8d61ffa5 2349 return;
66e67e41
JB		 2350 }
2351
bdcbd8e0 2352 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2353 ifmgd->auth_data->done = true;
2354 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2355 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2356 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2357
6b8ece3a
JM		 2358 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2359 ifmgd->auth_data->expected_transaction != 2) {
2360 /*
2361 * Report auth frame to user space for processing since another
2362 * round of Authentication frames is still needed.
2363 */
6ff57cf8 2364 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2365 return;
6b8ece3a
JM		 2366 }
2367
66e67e41
JB		 2368 /* move station state to auth */
2369 mutex_lock(&sdata->local->sta_mtx);
2370 sta = sta_info_get(sdata, bssid);
2371 if (!sta) {
2372 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2373 goto out_err;
2374 }
2375 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2376 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2377 goto out_err;
2378 }
2379 mutex_unlock(&sdata->local->sta_mtx);
2380
6ff57cf8 2381 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2382 return;
66e67e41
JB		 2383 out_err:
2384 mutex_unlock(&sdata->local->sta_mtx);
2385 /* ignore frame -- wait for timeout */
66e67e41
JB		 2386}
2387
2388
8d61ffa5
JB		 2389static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2390 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2391{
46900298 2392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2393 const u8 *bssid = NULL;
f0706e82
JB		 2394 u16 reason_code;
2395
8d61ffa5 2396 sdata_assert_lock(sdata);
66e67e41 2397
f4ea83dd 2398 if (len < 24 + 2)
8d61ffa5 2399 return;
f0706e82 2400
66e67e41 2401 if (!ifmgd->associated ||
b203ca39 2402 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2403 return;
77fdaa12 2404
0c1ad2ca 2405 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2406
2407 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2408
bdcbd8e0
JB		 2409 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2410 bssid, reason_code);
77fdaa12 2411
37ad3888
JB		 2412 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2413
6ff57cf8 2414 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2415}
2416
2417
8d61ffa5
JB		 2418static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2419 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2420{
46900298 2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2422 u16 reason_code;
2423
8d61ffa5 2424 sdata_assert_lock(sdata);
77fdaa12 2425
66e67e41 2426 if (len < 24 + 2)
8d61ffa5 2427 return;
77fdaa12 2428
66e67e41 2429 if (!ifmgd->associated ||
b203ca39 2430 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2431 return;
f0706e82
JB		 2432
2433 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2434
bdcbd8e0
JB		 2435 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2436 mgmt->sa, reason_code);
f0706e82 2437
37ad3888
JB		 2438 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2439
6ff57cf8 2440 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2441}
2442
c74d084f
CL		 2443static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2444 u8 *supp_rates, unsigned int supp_rates_len,
2445 u32 *rates, u32 *basic_rates,
2446 bool *have_higher_than_11mbit,
2103dec1
SW		 2447 int *min_rate, int *min_rate_index,
2448 int shift, u32 rate_flags)
c74d084f
CL		 2449{
2450 int i, j;
2451
2452 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2453 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2454 bool is_basic = !!(supp_rates[i] & 0x80);
2455
2103dec1 2456 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2457 *have_higher_than_11mbit = true;
2458
2459 /*
2460 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2461 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2462 *
2463 * Note: Even through the membership selector and the basic
2464 * rate flag share the same bit, they are not exactly
2465 * the same.
2466 */
2467 if (!!(supp_rates[i] & 0x80) &&
2468 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2469 continue;
2470
2471 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2472 struct ieee80211_rate *br;
2473 int brate;
2474
2475 br = &sband->bitrates[j];
2476 if ((rate_flags & br->flags) != rate_flags)
2477 continue;
2478
2479 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2480 if (brate == rate) {
c74d084f
CL		 2481 *rates |= BIT(j);
2482 if (is_basic)
2483 *basic_rates |= BIT(j);
2103dec1
SW		 2484 if ((rate * 5) < *min_rate) {
2485 *min_rate = rate * 5;
c74d084f
CL		 2486 *min_rate_index = j;
2487 }
2488 break;
2489 }
2490 }
2491 }
2492}
f0706e82 2493
66e67e41
JB		 2494static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2495 bool assoc)
2496{
2497 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2498
8d61ffa5 2499 sdata_assert_lock(sdata);
66e67e41 2500
66e67e41
JB		 2501 if (!assoc) {
2502 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2503
2504 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2505 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2506 sdata->u.mgd.flags = 0;
55de908a 2507 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2508 }
2509
2510 kfree(assoc_data);
2511 sdata->u.mgd.assoc_data = NULL;
2512}
2513
2514static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2515 struct cfg80211_bss *cbss,
af6b6374 2516 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2517{
46900298 2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2519 struct ieee80211_local *local = sdata->local;
8318d78a 2520 struct ieee80211_supported_band *sband;
f0706e82 2521 struct sta_info *sta;
af6b6374 2522 u8 *pos;
af6b6374 2523 u16 capab_info, aid;
f0706e82 2524 struct ieee802_11_elems elems;
bda3933a 2525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2526 const struct cfg80211_bss_ies *bss_ies = NULL;
2527 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2528 u32 changed = 0;
c74d084f 2529 int err;
35d865af 2530 bool ret;
f0706e82 2531
af6b6374 2532 /* AssocResp and ReassocResp have identical structure */
f0706e82 2533
f0706e82 2534 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2535 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2536
1dd84aa2 2537 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2538 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2539 aid);
1dd84aa2
JB		 2540 aid &= ~(BIT(15) | BIT(14));
2541
05cb9108
JB		 2542 ifmgd->broken_ap = false;
2543
2544 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2545 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2546 aid);
05cb9108
JB		 2547 aid = 0;
2548 ifmgd->broken_ap = true;
2549 }
2550
af6b6374 2551 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2552 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2553
f0706e82 2554 if (!elems.supp_rates) {
bdcbd8e0 2555 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2556 return false;
f0706e82
JB		 2557 }
2558
46900298 2559 ifmgd->aid = aid;
f0706e82 2560
35d865af
JB		 2561 /*
2562 * Some APs are erroneously not including some information in their
2563 * (re)association response frames. Try to recover by using the data
2564 * from the beacon or probe response. This seems to afflict mobile
2565 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2566 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2567 */
2568 if ((assoc_data->wmm && !elems.wmm_param) ||
2569 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2570 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2571 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2572 (!elems.vht_cap_elem || !elems.vht_operation))) {
2573 const struct cfg80211_bss_ies *ies;
2574 struct ieee802_11_elems bss_elems;
2575
2576 rcu_read_lock();
2577 ies = rcu_dereference(cbss->ies);
2578 if (ies)
2579 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2580 GFP_ATOMIC);
2581 rcu_read_unlock();
2582 if (!bss_ies)
2583 return false;
2584
2585 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2586 false, &bss_elems);
2587 if (assoc_data->wmm &&
2588 !elems.wmm_param && bss_elems.wmm_param) {
2589 elems.wmm_param = bss_elems.wmm_param;
2590 sdata_info(sdata,
2591 "AP bug: WMM param missing from AssocResp\n");
2592 }
2593
2594 /*
2595 * Also check if we requested HT/VHT, otherwise the AP doesn't
2596 * have to include the IEs in the (re)association response.
2597 */
2598 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2599 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2600 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2601 sdata_info(sdata,
2602 "AP bug: HT capability missing from AssocResp\n");
2603 }
2604 if (!elems.ht_operation && bss_elems.ht_operation &&
2605 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2606 elems.ht_operation = bss_elems.ht_operation;
2607 sdata_info(sdata,
2608 "AP bug: HT operation missing from AssocResp\n");
2609 }
2610 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2611 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2612 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2613 sdata_info(sdata,
2614 "AP bug: VHT capa missing from AssocResp\n");
2615 }
2616 if (!elems.vht_operation && bss_elems.vht_operation &&
2617 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2618 elems.vht_operation = bss_elems.vht_operation;
2619 sdata_info(sdata,
2620 "AP bug: VHT operation missing from AssocResp\n");
2621 }
2622 }
2623
30eb1dc2
JB		 2624 /*
2625 * We previously checked these in the beacon/probe response, so
2626 * they should be present here. This is just a safety net.
2627 */
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2629 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2630 sdata_info(sdata,
35d865af
JB		 2631 "HT AP is missing WMM params or HT capability/operation\n");
2632 ret = false;
2633 goto out;
30eb1dc2
JB		 2634 }
2635
2636 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2637 (!elems.vht_cap_elem || !elems.vht_operation)) {
2638 sdata_info(sdata,
35d865af
JB		 2639 "VHT AP is missing VHT capability/operation\n");
2640 ret = false;
2641 goto out;
30eb1dc2
JB		 2642 }
2643
2a33bee2
GE		 2644 mutex_lock(&sdata->local->sta_mtx);
2645 /*
2646 * station info was already allocated and inserted before
2647 * the association and should be available to us
2648 */
7852e361 2649 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2650 if (WARN_ON(!sta)) {
2651 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2652 ret = false;
2653 goto out;
77fdaa12 2654 }
05e5e883 2655
55de908a 2656 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2657
30eb1dc2 2658 /* Set up internal HT/VHT capabilities */
a8243b72 2659 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2660 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2661 elems.ht_cap_elem, sta);
64f68e5d 2662
818255ea
MP		 2663 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2664 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2665 elems.vht_cap_elem, sta);
818255ea 2666
30eb1dc2
JB		 2667 /*
2668 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2669 * in their association response, so ignore that data for our own
2670 * configuration. If it changed since the last beacon, we'll get the
2671 * next beacon and update then.
2672 */
1128958d 2673
bee7f586
JB		 2674 /*
2675 * If an operating mode notification IE is present, override the
2676 * NSS calculation (that would be done in rate_control_rate_init())
2677 * and use the # of streams from that element.
2678 */
2679 if (elems.opmode_notif &&
2680 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2681 u8 nss;
2682
2683 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2684 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2685 nss += 1;
2686 sta->sta.rx_nss = nss;
2687 }
2688
4b7679a5 2689 rate_control_rate_init(sta);
f0706e82 2690
46900298 2691 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2692 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2693
ddf4ac53 2694 if (elems.wmm_param)
c2c98fde 2695 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2696
3e4d40fa 2697 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2698 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2699 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2700 if (err) {
bdcbd8e0
JB		 2701 sdata_info(sdata,
2702 "failed to move station %pM to desired state\n",
2703 sta->sta.addr);
c8987876
JB		 2704 WARN_ON(__sta_info_destroy(sta));
2705 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2706 ret = false;
2707 goto out;
c8987876
JB		 2708 }
2709
7852e361 2710 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2711
f2176d72
JO		 2712 /*
2713 * Always handle WMM once after association regardless
2714 * of the first value the AP uses. Setting -1 here has
2715 * that effect because the AP values is an unsigned
2716 * 4-bit value.
2717 */
2718 ifmgd->wmm_last_param_set = -1;
2719
ddf4ac53 2720 if (elems.wmm_param)
4ced3f74 2721 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2722 elems.wmm_param_len);
aa837e1d 2723 else
3abead59
JB		 2724 ieee80211_set_wmm_default(sdata, false);
2725 changed |= BSS_CHANGED_QOS;
f0706e82 2726
60f8b39c
JB		 2727 /* set AID and assoc capability,
2728 * ieee80211_set_associated() will tell the driver */
2729 bss_conf->aid = aid;
2730 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2731 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2732
d524215f
FF		 2733 /*
2734 * If we're using 4-addr mode, let the AP know that we're
2735 * doing so, so that it can create the STA VLAN on its side
2736 */
2737 if (ifmgd->use_4addr)
2738 ieee80211_send_4addr_nullfunc(local, sdata);
2739
15b7b062 2740 /*
b291ba11
JB		 2741 * Start timer to probe the connection to the AP now.
2742 * Also start the timer that will detect beacon loss.
15b7b062 2743 */
b291ba11 2744 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2745 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2746
35d865af
JB		 2747 ret = true;
2748 out:
2749 kfree(bss_ies);
2750 return ret;
f0706e82
JB		 2751}
2752
8d61ffa5
JB		 2753static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2754 struct ieee80211_mgmt *mgmt,
2755 size_t len)
66e67e41
JB		 2756{
2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2758 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2759 u16 capab_info, status_code, aid;
2760 struct ieee802_11_elems elems;
2761 u8 *pos;
2762 bool reassoc;
8d61ffa5 2763 struct cfg80211_bss *bss;
66e67e41 2764
8d61ffa5 2765 sdata_assert_lock(sdata);
66e67e41
JB		 2766
2767 if (!assoc_data)
8d61ffa5 2768 return;
b203ca39 2769 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2770 return;
66e67e41
JB		 2771
2772 /*
2773 * AssocResp and ReassocResp have identical structure, so process both
2774 * of them in this function.
2775 */
2776
2777 if (len < 24 + 6)
8d61ffa5 2778 return;
66e67e41
JB		 2779
2780 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2781 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2782 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2783 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2784
bdcbd8e0
JB		 2785 sdata_info(sdata,
2786 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2787 reassoc ? "Rea" : "A", mgmt->sa,
2788 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2789
2790 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2791 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2792
2793 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2794 elems.timeout_int &&
2795 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2796 u32 tu, ms;
79ba1d89 2797 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2798 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2799 sdata_info(sdata,
2800 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2801 mgmt->sa, tu, ms);
66e67e41 2802 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2803 assoc_data->timeout_started = true;
66e67e41 2804 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2805 run_again(sdata, assoc_data->timeout);
2806 return;
66e67e41
JB		 2807 }
2808
8d61ffa5 2809 bss = assoc_data->bss;
66e67e41
JB		 2810
2811 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2812 sdata_info(sdata, "%pM denied association (code=%d)\n",
2813 mgmt->sa, status_code);
66e67e41
JB		 2814 ieee80211_destroy_assoc_data(sdata, false);
2815 } else {
8d61ffa5 2816 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2817 /* oops -- internal error -- send timeout for now */
10a9109f 2818 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2819 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2820 return;
66e67e41 2821 }
635d999f 2822 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2823
2824 /*
2825 * destroy assoc_data afterwards, as otherwise an idle
2826 * recalc after assoc_data is NULL but before associated
2827 * is set can cause the interface to go idle
2828 */
2829 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2830 }
2831
6ff57cf8 2832 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2833}
8e3c1b77 2834
98c8fccf 2835static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2836 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2837 struct ieee80211_rx_status *rx_status,
d45c4172 2838 struct ieee802_11_elems *elems)
98c8fccf
JB		 2839{
2840 struct ieee80211_local *local = sdata->local;
2841 int freq;
c2b13452 2842 struct ieee80211_bss *bss;
98c8fccf 2843 struct ieee80211_channel *channel;
56007a02 2844
8d61ffa5 2845 sdata_assert_lock(sdata);
b4f286a1 2846
1cd8e88e 2847 if (elems->ds_params)
59eb21a6
BR		 2848 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2849 rx_status->band);
98c8fccf
JB		 2850 else
2851 freq = rx_status->freq;
2852
2853 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2854
2855 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2856 return;
2857
98c8fccf 2858 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2859 channel);
817cee76 2860 if (bss) {
77fdaa12 2861 ieee80211_rx_bss_put(local, bss);
817cee76
AB		 2862 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2863 }
f0706e82
JB		 2864}
2865
2866
f698d856 2867static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2868 struct sk_buff *skb)
f0706e82 2869{
af6b6374 2870 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2871 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2872 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2873 size_t baselen, len = skb->len;
ae6a44e3
EK		 2874 struct ieee802_11_elems elems;
2875
15b7b062
KV		 2876 ifmgd = &sdata->u.mgd;
2877
8d61ffa5 2878 sdata_assert_lock(sdata);
77fdaa12 2879
b203ca39 2880 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2881 return; /* ignore ProbeResp to foreign address */
2882
ae6a44e3
EK		 2883 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2884 if (baselen > len)
2885 return;
2886
2887 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2888 false, &elems);
ae6a44e3 2889
d45c4172 2890 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2891
77fdaa12 2892 if (ifmgd->associated &&
b203ca39 2893 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2894 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2895
2896 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2897 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2898 /* got probe response, continue with auth */
bdcbd8e0 2899 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2900 ifmgd->auth_data->tries = 0;
2901 ifmgd->auth_data->timeout = jiffies;
89afe614 2902 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2903 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2904 }
f0706e82
JB		 2905}
2906
d91f36db
JB		 2907/*
2908 * This is the canonical list of information elements we care about,
2909 * the filter code also gives us all changes to the Microsoft OUI
2910 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2911 *
2912 * We implement beacon filtering in software since that means we can
2913 * avoid processing the frame here and in cfg80211, and userspace
2914 * will not be able to tell whether the hardware supports it or not.
2915 *
2916 * XXX: This list needs to be dynamic -- userspace needs to be able to
2917 * add items it requires. It also needs to be able to tell us to
2918 * look out for other vendor IEs.
2919 */
2920static const u64 care_about_ies =
1d4df3a5
JB		 2921 (1ULL << WLAN_EID_COUNTRY) |
2922 (1ULL << WLAN_EID_ERP_INFO) |
2923 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2924 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2925 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2926 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2927
8d61ffa5
JB		 2928static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2929 struct ieee80211_mgmt *mgmt, size_t len,
2930 struct ieee80211_rx_status *rx_status)
f0706e82 2931{
d91f36db 2932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2933 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2934 size_t baselen;
2935 struct ieee802_11_elems elems;
f698d856 2936 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2937 struct ieee80211_chanctx_conf *chanctx_conf;
2938 struct ieee80211_channel *chan;
bee7f586 2939 struct sta_info *sta;
471b3efd 2940 u32 changed = 0;
f87ad637 2941 bool erp_valid;
7a5158ef 2942 u8 erp_value = 0;
d91f36db 2943 u32 ncrc;
77fdaa12 2944 u8 *bssid;
8d61ffa5 2945 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2946
8d61ffa5 2947 sdata_assert_lock(sdata);
f0706e82 2948
ae6a44e3
EK		 2949 /* Process beacon from the current BSS */
2950 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2951 if (baselen > len)
8d61ffa5 2952 return;
ae6a44e3 2953
55de908a
JB		 2954 rcu_read_lock();
2955 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2956 if (!chanctx_conf) {
2957 rcu_read_unlock();
8d61ffa5 2958 return;
55de908a
JB		 2959 }
2960
4bf88530 2961 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2962 rcu_read_unlock();
8d61ffa5 2963 return;
55de908a 2964 }
4bf88530 2965 chan = chanctx_conf->def.chan;
55de908a 2966 rcu_read_unlock();
f0706e82 2967
c65dd147 2968 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2969 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2970 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2971 len - baselen, false, &elems);
77fdaa12 2972
d45c4172 2973 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2974 if (elems.tim && !elems.parse_error) {
2975 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2976 ifmgd->dtim_period = tim_ie->dtim_period;
2977 }
989c6505 2978 ifmgd->have_beacon = true;
c65dd147 2979 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2980 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2981 sdata->vif.bss_conf.sync_tsf =
2982 le64_to_cpu(mgmt->u.beacon.timestamp);
2983 sdata->vif.bss_conf.sync_device_ts =
2984 rx_status->device_timestamp;
2985 if (elems.tim)
2986 sdata->vif.bss_conf.sync_dtim_count =
2987 elems.tim->dtim_count;
2988 else
2989 sdata->vif.bss_conf.sync_dtim_count = 0;
2990 }
66e67e41
JB		 2991 /* continue assoc process */
2992 ifmgd->assoc_data->timeout = jiffies;
89afe614 2993 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2994 run_again(sdata, ifmgd->assoc_data->timeout);
2995 return;
66e67e41 2996 }
77fdaa12 2997
66e67e41 2998 if (!ifmgd->associated ||
b203ca39 2999 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3000 return;
66e67e41 3001 bssid = ifmgd->associated->bssid;
f0706e82 3002
17e4ec14
JM		 3003 /* Track average RSSI from the Beacon frames of the current AP */
3004 ifmgd->last_beacon_signal = rx_status->signal;
3005 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3006 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3007 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3008 ifmgd->last_cqm_event_signal = 0;
391a200a 3009 ifmgd->count_beacon_signal = 1;
615f7b9b 3010 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3011 } else {
3012 ifmgd->ave_beacon_signal =
3013 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3014 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3015 ifmgd->ave_beacon_signal) / 16;
391a200a 3016 ifmgd->count_beacon_signal++;
17e4ec14 3017 }
615f7b9b
MV		 3018
3019 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3020 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3021 int sig = ifmgd->ave_beacon_signal;
3022 int last_sig = ifmgd->last_ave_beacon_signal;
3023
3024 /*
3025 * if signal crosses either of the boundaries, invoke callback
3026 * with appropriate parameters
3027 */
3028 if (sig > ifmgd->rssi_max_thold &&
3029 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3030 ifmgd->last_ave_beacon_signal = sig;
887da917 3031 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3032 } else if (sig < ifmgd->rssi_min_thold &&
3033 (last_sig >= ifmgd->rssi_max_thold ||
3034 last_sig == 0)) {
3035 ifmgd->last_ave_beacon_signal = sig;
887da917 3036 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3037 }
3038 }
3039
17e4ec14 3040 if (bss_conf->cqm_rssi_thold &&
391a200a 3041 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3042 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3043 int sig = ifmgd->ave_beacon_signal / 16;
3044 int last_event = ifmgd->last_cqm_event_signal;
3045 int thold = bss_conf->cqm_rssi_thold;
3046 int hyst = bss_conf->cqm_rssi_hyst;
3047 if (sig < thold &&
3048 (last_event == 0 || sig < last_event - hyst)) {
3049 ifmgd->last_cqm_event_signal = sig;
3050 ieee80211_cqm_rssi_notify(
3051 &sdata->vif,
3052 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3053 GFP_KERNEL);
3054 } else if (sig > thold &&
3055 (last_event == 0 || sig > last_event + hyst)) {
3056 ifmgd->last_cqm_event_signal = sig;
3057 ieee80211_cqm_rssi_notify(
3058 &sdata->vif,
3059 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3060 GFP_KERNEL);
3061 }
3062 }
3063
b291ba11 3064 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 3065 mlme_dbg_ratelimited(sdata,
112c31f0 3066 "cancelling AP probe due to a received beacon\n");
925e64c3 3067 mutex_lock(&local->mtx);
b291ba11 3068 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 3069 ieee80211_run_deferred_scan(local);
3070 mutex_unlock(&local->mtx);
3071
4e751843
JB		 3072 mutex_lock(&local->iflist_mtx);
3073 ieee80211_recalc_ps(local, -1);
3074 mutex_unlock(&local->iflist_mtx);
92778180
JM		 3075 }
3076
b291ba11
JB		 3077 /*
3078 * Push the beacon loss detection into the future since
3079 * we are processing a beacon from the AP just now.
3080 */
d3a910a8 3081 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3082
d91f36db
JB		 3083 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3084 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3085 len - baselen, false, &elems,
d91f36db
JB		 3086 care_about_ies, ncrc);
3087
25c9c875 3088 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3089 bool directed_tim = ieee80211_check_tim(elems.tim,
3090 elems.tim_len,
3091 ifmgd->aid);
1fb3606b 3092 if (directed_tim) {
572e0012 3093 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3096 ieee80211_hw_config(local,
3097 IEEE80211_CONF_CHANGE_PS);
3098 }
572e0012 3099 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3100 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3101 local->pspolling = true;
3102
3103 /*
3104 * Here is assumed that the driver will be
3105 * able to send ps-poll frame and receive a
3106 * response even though power save mode is
3107 * enabled, but some drivers might require
3108 * to disable power save here. This needs
3109 * to be investigated.
3110 */
3111 ieee80211_send_pspoll(local, sdata);
3112 }
a97b77b9
VN		 3113 }
3114 }
7a5158ef 3115
488dd7b5 3116 if (sdata->vif.p2p) {
67baf663 3117 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3118 int ret;
3119
3120 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3121 len - baselen,
3122 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3123 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3124 if (ret >= 2) {
3125 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3126 /* valid noa_attr and index changed */
3127 sdata->u.mgd.p2p_noa_index = noa.index;
3128 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3129 changed |= BSS_CHANGED_P2P_PS;
3130 /*
3131 * make sure we update all information, the CRC
3132 * mechanism doesn't look at P2P attributes.
3133 */
3134 ifmgd->beacon_crc_valid = false;
3135 }
3136 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3137 /* noa_attr not found and we had valid noa_attr before */
3138 sdata->u.mgd.p2p_noa_index = -1;
3139 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3140 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3141 ifmgd->beacon_crc_valid = false;
3142 }
3143 }
3144
d8ec4433 3145 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3146 return;
30196673 3147 ifmgd->beacon_crc = ncrc;
d8ec4433 3148 ifmgd->beacon_crc_valid = true;
30196673 3149
d45c4172 3150 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3151
d70b7616
JB		 3152 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3153 &elems, true);
3154
7d25745d
JB		 3155 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3156 elems.wmm_param_len))
3157 changed |= BSS_CHANGED_QOS;
3158
c65dd147
EG		 3159 /*
3160 * If we haven't had a beacon before, tell the driver about the
ef429dad 3161 * DTIM period (and beacon timing if desired) now.
c65dd147 3162 */
989c6505 3163 if (!ifmgd->have_beacon) {
c65dd147
EG		 3164 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3165 if (elems.tim)
3166 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3167 else
3168 bss_conf->dtim_period = 1;
ef429dad
JB		 3169
3170 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3171 sdata->vif.bss_conf.sync_tsf =
3172 le64_to_cpu(mgmt->u.beacon.timestamp);
3173 sdata->vif.bss_conf.sync_device_ts =
3174 rx_status->device_timestamp;
3175 if (elems.tim)
3176 sdata->vif.bss_conf.sync_dtim_count =
3177 elems.tim->dtim_count;
3178 else
3179 sdata->vif.bss_conf.sync_dtim_count = 0;
3180 }
3181
989c6505
AB		 3182 changed |= BSS_CHANGED_BEACON_INFO;
3183 ifmgd->have_beacon = true;
482a9c74
AB		 3184
3185 mutex_lock(&local->iflist_mtx);
3186 ieee80211_recalc_ps(local, -1);
3187 mutex_unlock(&local->iflist_mtx);
3188
ce857888 3189 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3190 }
3191
1946bed9 3192 if (elems.erp_info) {
7a5158ef
JB		 3193 erp_valid = true;
3194 erp_value = elems.erp_info[0];
3195 } else {
3196 erp_valid = false;
50c4afb9 3197 }
7a5158ef
JB		 3198 changed |= ieee80211_handle_bss_capability(sdata,
3199 le16_to_cpu(mgmt->u.beacon.capab_info),
3200 erp_valid, erp_value);
f0706e82 3201
1128958d 3202 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3203 sta = sta_info_get(sdata, bssid);
3204
30eb1dc2
JB		 3205 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3206 elems.vht_operation, bssid, &changed)) {
3207 mutex_unlock(&local->sta_mtx);
3208 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3209 WLAN_REASON_DEAUTH_LEAVING,
3210 true, deauth_buf);
6ff57cf8
JB		 3211 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3212 sizeof(deauth_buf));
8d61ffa5 3213 return;
30eb1dc2 3214 }
bee7f586
JB		 3215
3216 if (sta && elems.opmode_notif)
3217 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3218 rx_status->band, true);
1128958d 3219 mutex_unlock(&local->sta_mtx);
d3c990fb 3220
04b7b2ff
JB		 3221 if (elems.country_elem && elems.pwr_constr_elem &&
3222 mgmt->u.probe_resp.capab_info &
3223 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3224 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3225 elems.country_elem,
3226 elems.country_elem_len,
3227 elems.pwr_constr_elem);
3f2355cb 3228
471b3efd 3229 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3230}
3231
1fa57d01
JB		 3232void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3233 struct sk_buff *skb)
f0706e82
JB		 3234{
3235 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3236 struct ieee80211_mgmt *mgmt;
3237 u16 fc;
1b3a2e49
JB		 3238 struct ieee802_11_elems elems;
3239 int ies_len;
f0706e82 3240
f0706e82
JB		 3241 rx_status = (struct ieee80211_rx_status *) skb->cb;
3242 mgmt = (struct ieee80211_mgmt *) skb->data;
3243 fc = le16_to_cpu(mgmt->frame_control);
3244
8d61ffa5 3245 sdata_lock(sdata);
77fdaa12 3246
66e67e41
JB		 3247 switch (fc & IEEE80211_FCTL_STYPE) {
3248 case IEEE80211_STYPE_BEACON:
8d61ffa5 3249 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3250 break;
3251 case IEEE80211_STYPE_PROBE_RESP:
3252 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3253 break;
3254 case IEEE80211_STYPE_AUTH:
8d61ffa5 3255 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3256 break;
3257 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3258 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3259 break;
3260 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3261 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3262 break;
3263 case IEEE80211_STYPE_ASSOC_RESP:
3264 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3265 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3266 break;
3267 case IEEE80211_STYPE_ACTION:
37799e52 3268 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3269 ies_len = skb->len -
3270 offsetof(struct ieee80211_mgmt,
3271 u.action.u.chan_switch.variable);
37799e52
JB		 3272
3273 if (ies_len < 0)
3274 break;
3275
3276 ieee802_11_parse_elems(
3277 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3278 ies_len, true, &elems);
37799e52
JB		 3279
3280 if (elems.parse_error)
3281 break;
3282
1b3a2e49
JB		 3283 ieee80211_sta_process_chanswitch(sdata,
3284 rx_status->mactime,
04a161f4 3285 &elems, false);
1b3a2e49
JB		 3286 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3287 ies_len = skb->len -
3288 offsetof(struct ieee80211_mgmt,
3289 u.action.u.ext_chan_switch.variable);
3290
3291 if (ies_len < 0)
3292 break;
3293
3294 ieee802_11_parse_elems(
3295 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3296 ies_len, true, &elems);
1b3a2e49
JB		 3297
3298 if (elems.parse_error)
3299 break;
3300
3301 /* for the handling code pretend this was also an IE */
3302 elems.ext_chansw_ie =
3303 &mgmt->u.action.u.ext_chan_switch.data;
3304
66e67e41 3305 ieee80211_sta_process_chanswitch(sdata,
37799e52 3306 rx_status->mactime,
04a161f4 3307 &elems, false);
77fdaa12 3308 }
37799e52 3309 break;
77fdaa12 3310 }
8d61ffa5 3311 sdata_unlock(sdata);
f0706e82
JB		 3312}
3313
9c6bd790 3314static void ieee80211_sta_timer(unsigned long data)
f0706e82 3315{
60f8b39c
JB		 3316 struct ieee80211_sub_if_data *sdata =
3317 (struct ieee80211_sub_if_data *) data;
5bb644a0 3318
9b7d72c1 3319 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3320}
3321
04ac3c0e 3322static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3323 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3324{
6ae16775 3325 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3326
37ad3888 3327 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3328 tx, frame_buf);
37ad3888 3329
6ff57cf8
JB		 3330 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3331 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3332}
3333
66e67e41
JB		 3334static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3335{
3336 struct ieee80211_local *local = sdata->local;
3337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3338 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3339 u32 tx_flags = 0;
66e67e41 3340
8d61ffa5 3341 sdata_assert_lock(sdata);
66e67e41
JB		 3342
3343 if (WARN_ON_ONCE(!auth_data))
3344 return -EINVAL;
3345
66e67e41
JB		 3346 auth_data->tries++;
3347
3348 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3349 sdata_info(sdata, "authentication with %pM timed out\n",
3350 auth_data->bss->bssid);
66e67e41
JB		 3351
3352 /*
3353 * Most likely AP is not in the range so remove the
3354 * bss struct for that AP.
3355 */
3356 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3357
3358 return -ETIMEDOUT;
3359 }
3360
a1845fc7
JB		 3361 drv_mgd_prepare_tx(local, sdata);
3362
66e67e41 3363 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3364 u16 trans = 1;
3365 u16 status = 0;
3366
bdcbd8e0
JB		 3367 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3368 auth_data->bss->bssid, auth_data->tries,
3369 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3370
3371 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3372
3373 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3374 trans = auth_data->sae_trans;
3375 status = auth_data->sae_status;
3376 auth_data->expected_transaction = trans;
3377 }
3378
6211dd12
SG		 3379 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3380 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3381 IEEE80211_TX_INTFL_MLME_CONN_TX;
3382
6b8ece3a
JM		 3383 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3384 auth_data->data, auth_data->data_len,
66e67e41 3385 auth_data->bss->bssid,
1672c0e3
JB		 3386 auth_data->bss->bssid, NULL, 0, 0,
3387 tx_flags);
66e67e41
JB		 3388 } else {
3389 const u8 *ssidie;
3390
bdcbd8e0
JB		 3391 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3392 auth_data->bss->bssid, auth_data->tries,
3393 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3394
9caf0364 3395 rcu_read_lock();
66e67e41 3396 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3397 if (!ssidie) {
3398 rcu_read_unlock();
66e67e41 3399 return -EINVAL;
9caf0364 3400 }
66e67e41
JB		 3401 /*
3402 * Direct probe is sent to broadcast address as some APs
3403 * will not answer to direct packet in unassociated state.
3404 */
3405 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3406 NULL, 0, (u32) -1, true, 0,
55de908a 3407 auth_data->bss->channel, false);
9caf0364 3408 rcu_read_unlock();
66e67e41
JB		 3409 }
3410
6211dd12 3411 if (tx_flags == 0) {
1672c0e3 3412 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3413 auth_data->timeout_started = true;
8d61ffa5 3414 run_again(sdata, auth_data->timeout);
89afe614 3415 } else {
cb236d2d
JB		 3416 auth_data->timeout =
3417 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3418 auth_data->timeout_started = true;
3419 run_again(sdata, auth_data->timeout);
1672c0e3 3420 }
66e67e41
JB		 3421
3422 return 0;
3423}
3424
3425static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3426{
3427 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3428 struct ieee80211_local *local = sdata->local;
3429
8d61ffa5 3430 sdata_assert_lock(sdata);
66e67e41 3431
66e67e41
JB		 3432 assoc_data->tries++;
3433 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3434 sdata_info(sdata, "association with %pM timed out\n",
3435 assoc_data->bss->bssid);
66e67e41
JB		 3436
3437 /*
3438 * Most likely AP is not in the range so remove the
3439 * bss struct for that AP.
3440 */
3441 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3442
3443 return -ETIMEDOUT;
3444 }
3445
bdcbd8e0
JB		 3446 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3447 assoc_data->bss->bssid, assoc_data->tries,
3448 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3449 ieee80211_send_assoc(sdata);
3450
1672c0e3
JB		 3451 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3452 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3453 assoc_data->timeout_started = true;
8d61ffa5 3454 run_again(sdata, assoc_data->timeout);
89afe614 3455 } else {
cb236d2d
JB		 3456 assoc_data->timeout =
3457 round_jiffies_up(jiffies +
3458 IEEE80211_ASSOC_TIMEOUT_LONG);
3459 assoc_data->timeout_started = true;
3460 run_again(sdata, assoc_data->timeout);
1672c0e3 3461 }
66e67e41
JB		 3462
3463 return 0;
3464}
3465
1672c0e3
JB		 3466void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3467 __le16 fc, bool acked)
3468{
3469 struct ieee80211_local *local = sdata->local;
3470
3471 sdata->u.mgd.status_fc = fc;
3472 sdata->u.mgd.status_acked = acked;
3473 sdata->u.mgd.status_received = true;
3474
3475 ieee80211_queue_work(&local->hw, &sdata->work);
3476}
3477
1fa57d01 3478void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3479{
9c6bd790 3480 struct ieee80211_local *local = sdata->local;
1fa57d01 3481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3482
8d61ffa5 3483 sdata_lock(sdata);
77fdaa12 3484
1672c0e3
JB		 3485 if (ifmgd->status_received) {
3486 __le16 fc = ifmgd->status_fc;
3487 bool status_acked = ifmgd->status_acked;
3488
3489 ifmgd->status_received = false;
3490 if (ifmgd->auth_data &&
3491 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3492 if (status_acked) {
3493 ifmgd->auth_data->timeout =
3494 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3495 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3496 } else {
3497 ifmgd->auth_data->timeout = jiffies - 1;
3498 }
89afe614 3499 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3500 } else if (ifmgd->assoc_data &&
3501 (ieee80211_is_assoc_req(fc) ||
3502 ieee80211_is_reassoc_req(fc))) {
3503 if (status_acked) {
3504 ifmgd->assoc_data->timeout =
3505 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3506 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3507 } else {
3508 ifmgd->assoc_data->timeout = jiffies - 1;
3509 }
89afe614 3510 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3511 }
3512 }
3513
89afe614 3514 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3515 time_after(jiffies, ifmgd->auth_data->timeout)) {
3516 if (ifmgd->auth_data->done) {
3517 /*
3518 * ok ... we waited for assoc but userspace didn't,
3519 * so let's just kill the auth data
3520 */
3521 ieee80211_destroy_auth_data(sdata, false);
3522 } else if (ieee80211_probe_auth(sdata)) {
3523 u8 bssid[ETH_ALEN];
3524
3525 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3526
3527 ieee80211_destroy_auth_data(sdata, false);
3528
6ff57cf8 3529 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3530 }
89afe614 3531 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3532 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3533
89afe614 3534 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3535 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3536 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3537 ieee80211_do_assoc(sdata)) {
959867fa 3538 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3539
3540 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3541 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3542 }
89afe614 3543 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3544 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3545
b291ba11
JB		 3546 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3547 IEEE80211_STA_CONNECTION_POLL) &&
3548 ifmgd->associated) {
a43abf29 3549 u8 bssid[ETH_ALEN];
72a8a3ed 3550 int max_tries;
a43abf29 3551
0c1ad2ca 3552 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3553
72a8a3ed 3554 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3555 max_tries = max_nullfunc_tries;
72a8a3ed 3556 else
180205bd 3557 max_tries = max_probe_tries;
72a8a3ed 3558
4e5ff376
FF		 3559 /* ACK received for nullfunc probing frame */
3560 if (!ifmgd->probe_send_count)
3561 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3562 else if (ifmgd->nullfunc_failed) {
3563 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3564 mlme_dbg(sdata,
3565 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3566 bssid, ifmgd->probe_send_count,
3567 max_tries);
04ac3c0e
FF		 3568 ieee80211_mgd_probe_ap_send(sdata);
3569 } else {
bdcbd8e0
JB		 3570 mlme_dbg(sdata,
3571 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3572 bssid);
95acac61 3573 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3574 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3575 false);
04ac3c0e
FF		 3576 }
3577 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3578 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3579 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3580 mlme_dbg(sdata,
3581 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3582 bssid, probe_wait_ms);
95acac61 3583 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3584 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3585 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3586 mlme_dbg(sdata,
3587 "No probe response from AP %pM after %dms, try %d/%i\n",
3588 bssid, probe_wait_ms,
3589 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3590 ieee80211_mgd_probe_ap_send(sdata);
3591 } else {
b291ba11
JB		 3592 /*
3593 * We actually lost the connection ... or did we?
3594 * Let's make sure!
3595 */
b38afa87
BG		 3596 wiphy_debug(local->hw.wiphy,
3597 "%s: No probe response from AP %pM"
3598 " after %dms, disconnecting.\n",
3599 sdata->name,
180205bd 3600 bssid, probe_wait_ms);
04ac3c0e 3601
95acac61 3602 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3603 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3604 }
3605 }
3606
8d61ffa5 3607 sdata_unlock(sdata);
f0706e82
JB		 3608}
3609
b291ba11
JB		 3610static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3611{
3612 struct ieee80211_sub_if_data *sdata =
3613 (struct ieee80211_sub_if_data *) data;
3614 struct ieee80211_local *local = sdata->local;
3615
3616 if (local->quiescing)
3617 return;
3618
682bd38b 3619 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3620 ieee80211_queue_work(&sdata->local->hw,
3621 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3622}
3623
3624static void ieee80211_sta_conn_mon_timer(unsigned long data)
3625{
3626 struct ieee80211_sub_if_data *sdata =
3627 (struct ieee80211_sub_if_data *) data;
3628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3629 struct ieee80211_local *local = sdata->local;
3630
3631 if (local->quiescing)
3632 return;
3633
42935eca 3634 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3635}
3636
3637static void ieee80211_sta_monitor_work(struct work_struct *work)
3638{
3639 struct ieee80211_sub_if_data *sdata =
3640 container_of(work, struct ieee80211_sub_if_data,
3641 u.mgd.monitor_work);
3642
3643 ieee80211_mgd_probe_ap(sdata, false);
3644}
3645
9c6bd790
JB		 3646static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3647{
494f1fe5
EP		 3648 u32 flags;
3649
ad935687 3650 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3651 __ieee80211_stop_poll(sdata);
ad935687 3652
b291ba11 3653 /* let's probe the connection once */
494f1fe5
EP		 3654 flags = sdata->local->hw.flags;
3655 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3656 ieee80211_queue_work(&sdata->local->hw,
3657 &sdata->u.mgd.monitor_work);
b291ba11 3658 /* and do all the other regular work too */
64592c8f 3659 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3660 }
9c6bd790 3661}
f0706e82 3662
b8360ab8
JB		 3663#ifdef CONFIG_PM
3664void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3665{
3666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3667
8d61ffa5 3668 sdata_lock(sdata);
b8360ab8 3669 if (!ifmgd->associated) {
8d61ffa5 3670 sdata_unlock(sdata);
b8360ab8
JB		 3671 return;
3672 }
3673
3674 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3675 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3676 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3677 ieee80211_sta_connection_lost(sdata,
3678 ifmgd->associated->bssid,
3679 WLAN_REASON_UNSPECIFIED,
3680 true);
8d61ffa5 3681 sdata_unlock(sdata);
b8360ab8
JB		 3682 return;
3683 }
8d61ffa5 3684 sdata_unlock(sdata);
b8360ab8
JB		 3685}
3686#endif
3687
9c6bd790
JB		 3688/* interface setup */
3689void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3690{
46900298 3691 struct ieee80211_if_managed *ifmgd;
988c0f72 3692
46900298 3693 ifmgd = &sdata->u.mgd;
b291ba11 3694 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3695 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3696 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3697 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3698 INIT_WORK(&ifmgd->csa_connection_drop_work,
3699 ieee80211_csa_connection_drop_work);
d1f5b7a3 3700 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3701 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3702 (unsigned long) sdata);
b291ba11
JB		 3703 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3704 (unsigned long) sdata);
3705 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3706 (unsigned long) sdata);
46900298 3707 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3708 (unsigned long) sdata);
9c6bd790 3709
ab1faead 3710 ifmgd->flags = 0;
1478acb3 3711 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3712 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3713 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3714 ifmgd->p2p_noa_index = -1;
bbbdff9e 3715
0f78231b
JB		 3716 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3717 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3718 else
3719 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3720}
3721
77fdaa12
JB		 3722/* scan finished notification */
3723void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3724{
31ee67a1 3725 struct ieee80211_sub_if_data *sdata;
60f8b39c 3726
77fdaa12
JB		 3727 /* Restart STA timers */
3728 rcu_read_lock();
370bd005
BG		 3729 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3730 if (ieee80211_sdata_running(sdata))
3731 ieee80211_restart_sta_timer(sdata);
3732 }
77fdaa12
JB		 3733 rcu_read_unlock();
3734}
60f8b39c 3735
77fdaa12
JB		 3736int ieee80211_max_network_latency(struct notifier_block *nb,
3737 unsigned long data, void *dummy)
3738{
3739 s32 latency_usec = (s32) data;
3740 struct ieee80211_local *local =
3741 container_of(nb, struct ieee80211_local,
3742 network_latency_notifier);
1fa6f4af 3743
77fdaa12
JB		 3744 mutex_lock(&local->iflist_mtx);
3745 ieee80211_recalc_ps(local, latency_usec);
3746 mutex_unlock(&local->iflist_mtx);
dfe67012 3747
77fdaa12 3748 return 0;
9c6bd790
JB		 3749}
3750
f2d9d270
JB		 3751static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3752 struct cfg80211_bss *cbss)
3753{
3754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3755 const u8 *ht_cap_ie, *vht_cap_ie;
3756 const struct ieee80211_ht_cap *ht_cap;
3757 const struct ieee80211_vht_cap *vht_cap;
3758 u8 chains = 1;
3759
3760 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3761 return chains;
3762
9caf0364 3763 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3764 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3765 ht_cap = (void *)(ht_cap_ie + 2);
3766 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3767 /*
3768 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3769 * "Tx Unequal Modulation Supported" fields.
3770 */
3771 }
3772
3773 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3774 return chains;
3775
9caf0364 3776 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3777 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3778 u8 nss;
3779 u16 tx_mcs_map;
3780
3781 vht_cap = (void *)(vht_cap_ie + 2);
3782 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3783 for (nss = 8; nss > 0; nss--) {
3784 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3785 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3786 break;
3787 }
3788 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3789 chains = max(chains, nss);
3790 }
3791
3792 return chains;
3793}
3794
b17166a7
JB		 3795static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3796 struct cfg80211_bss *cbss)
a1cf775d
JB		 3797{
3798 struct ieee80211_local *local = sdata->local;
3799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3800 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3801 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3802 struct ieee80211_supported_band *sband;
4bf88530 3803 struct cfg80211_chan_def chandef;
f2d9d270 3804 int ret;
a1cf775d 3805
24398e39
JB		 3806 sband = local->hw.wiphy->bands[cbss->channel->band];
3807
f2d9d270
JB		 3808 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3809 IEEE80211_STA_DISABLE_80P80MHZ |
3810 IEEE80211_STA_DISABLE_160MHZ);
3811
9caf0364
JB		 3812 rcu_read_lock();
3813
f2d9d270
JB		 3814 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3815 sband->ht_cap.ht_supported) {
08e6effa 3816 const u8 *ht_oper_ie, *ht_cap;
24398e39 3817
9caf0364 3818 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3819 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3820 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3821
3822 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3823 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3824 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3825 ht_oper = NULL;
3826 }
24398e39
JB		 3827 }
3828
f2d9d270
JB		 3829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3830 sband->vht_cap.vht_supported) {
08e6effa 3831 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3832
9caf0364
JB		 3833 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3834 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3835 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3836 vht_oper = (void *)(vht_oper_ie + 2);
3837 if (vht_oper && !ht_oper) {
3838 vht_oper = NULL;
bdcbd8e0 3839 sdata_info(sdata,
f2d9d270 3840 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3841 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3842 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3843 }
08e6effa
JB		 3844
3845 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3846 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3847 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3848 vht_oper = NULL;
3849 }
24398e39
JB		 3850 }
3851
f2d9d270
JB		 3852 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3853 cbss->channel,
3854 ht_oper, vht_oper,
5cdaed1e 3855 &chandef, false);
04ecd257 3856
f2d9d270
JB		 3857 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3858 local->rx_chains);
24398e39 3859
9caf0364
JB		 3860 rcu_read_unlock();
3861
04ecd257
JB		 3862 /* will change later if needed */
3863 sdata->smps_mode = IEEE80211_SMPS_OFF;
3864
f2d9d270
JB		 3865 /*
3866 * If this fails (possibly due to channel context sharing
3867 * on incompatible channels, e.g. 80+80 and 160 sharing the
3868 * same control channel) try to use a smaller bandwidth.
3869 */
3870 ret = ieee80211_vif_use_channel(sdata, &chandef,
3871 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3872
3873 /* don't downgrade for 5 and 10 MHz channels, though. */
3874 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3875 chandef.width == NL80211_CHAN_WIDTH_10)
3876 return ret;
3877
d601cd8d 3878 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3879 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3880 ret = ieee80211_vif_use_channel(sdata, &chandef,
3881 IEEE80211_CHANCTX_SHARED);
3882 }
f2d9d270 3883 return ret;
b17166a7
JB		 3884}
3885
3886static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3887 struct cfg80211_bss *cbss, bool assoc)
3888{
3889 struct ieee80211_local *local = sdata->local;
3890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3891 struct ieee80211_bss *bss = (void *)cbss->priv;
3892 struct sta_info *new_sta = NULL;
3893 bool have_sta = false;
3894 int err;
3895
3896 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3897 return -EINVAL;
3898
3899 if (assoc) {
3900 rcu_read_lock();
3901 have_sta = sta_info_get(sdata, cbss->bssid);
3902 rcu_read_unlock();
3903 }
3904
3905 if (!have_sta) {
3906 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3907 if (!new_sta)
3908 return -ENOMEM;
3909 }
13e0c8e3 3910 if (new_sta) {
5d6a1b06
JB		 3911 u32 rates = 0, basic_rates = 0;
3912 bool have_higher_than_11mbit;
3913 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3914 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3915 struct ieee80211_supported_band *sband;
8cef2c9d 3916 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3917 int shift;
3918 u32 rate_flags;
b17166a7
JB		 3919
3920 sband = local->hw.wiphy->bands[cbss->channel->band];
3921
3922 err = ieee80211_prep_channel(sdata, cbss);
3923 if (err) {
3924 sta_info_free(local, new_sta);
2103dec1 3925 return -EINVAL;
b17166a7 3926 }
2103dec1
SW		 3927 shift = ieee80211_vif_get_shift(&sdata->vif);
3928
3929 rcu_read_lock();
3930 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3931 if (WARN_ON(!chanctx_conf)) {
3932 rcu_read_unlock();
3933 return -EINVAL;
3934 }
3935 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3936 rcu_read_unlock();
5d6a1b06 3937
5d6a1b06
JB		 3938 ieee80211_get_rates(sband, bss->supp_rates,
3939 bss->supp_rates_len,
3940 &rates, &basic_rates,
3941 &have_higher_than_11mbit,
2103dec1
SW		 3942 &min_rate, &min_rate_index,
3943 shift, rate_flags);
5d6a1b06
JB		 3944
3945 /*
3946 * This used to be a workaround for basic rates missing
3947 * in the association response frame. Now that we no
3948 * longer use the basic rates from there, it probably
3949 * doesn't happen any more, but keep the workaround so
3950 * in case some *other* APs are buggy in different ways
3951 * we can connect -- with a warning.
3952 */
3953 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3954 sdata_info(sdata,
3955 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3956 basic_rates = BIT(min_rate_index);
3957 }
3958
13e0c8e3 3959 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3960 sdata->vif.bss_conf.basic_rates = basic_rates;
3961
3962 /* cf. IEEE 802.11 9.2.12 */
55de908a 3963 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3964 have_higher_than_11mbit)
3965 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3966 else
3967 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3968
3969 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3970
8c358bcd
JB		 3971 /* set timing information */
3972 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3973 rcu_read_lock();
ef429dad
JB		 3974 ies = rcu_dereference(cbss->beacon_ies);
3975 if (ies) {
3976 const u8 *tim_ie;
3977
3978 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3979 sdata->vif.bss_conf.sync_device_ts =
3980 bss->device_ts_beacon;
3981 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3982 ies->data, ies->len);
3983 if (tim_ie && tim_ie[1] >= 2)
3984 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3985 else
3986 sdata->vif.bss_conf.sync_dtim_count = 0;
3987 } else if (!(local->hw.flags &
3988 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3989 ies = rcu_dereference(cbss->proberesp_ies);
3990 /* must be non-NULL since beacon IEs were NULL */
3991 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3992 sdata->vif.bss_conf.sync_device_ts =
3993 bss->device_ts_presp;
3994 sdata->vif.bss_conf.sync_dtim_count = 0;
3995 } else {
3996 sdata->vif.bss_conf.sync_tsf = 0;
3997 sdata->vif.bss_conf.sync_device_ts = 0;
3998 sdata->vif.bss_conf.sync_dtim_count = 0;
3999 }
8cef2c9d 4000 rcu_read_unlock();
8c358bcd
JB		 4001
4002 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4003 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4004 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4005 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4006
4007 if (assoc)
13e0c8e3 4008 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4009
13e0c8e3
JB		 4010 err = sta_info_insert(new_sta);
4011 new_sta = NULL;
a1cf775d 4012 if (err) {
bdcbd8e0
JB		 4013 sdata_info(sdata,
4014 "failed to insert STA entry for the AP (error %d)\n",
4015 err);
a1cf775d
JB		 4016 return err;
4017 }
4018 } else
b203ca39 4019 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4020
4021 return 0;
4022}
4023
77fdaa12
JB		 4024/* config hooks */
4025int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4026 struct cfg80211_auth_request *req)
9c6bd790 4027{
66e67e41
JB		 4028 struct ieee80211_local *local = sdata->local;
4029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4030 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4031 u16 auth_alg;
66e67e41
JB		 4032 int err;
4033
4034 /* prepare auth data structure */
9c6bd790 4035
77fdaa12
JB		 4036 switch (req->auth_type) {
4037 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4038 auth_alg = WLAN_AUTH_OPEN;
4039 break;
4040 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4041 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4042 return -EOPNOTSUPP;
77fdaa12
JB		 4043 auth_alg = WLAN_AUTH_SHARED_KEY;
4044 break;
4045 case NL80211_AUTHTYPE_FT:
4046 auth_alg = WLAN_AUTH_FT;
4047 break;
4048 case NL80211_AUTHTYPE_NETWORK_EAP:
4049 auth_alg = WLAN_AUTH_LEAP;
4050 break;
6b8ece3a
JM		 4051 case NL80211_AUTHTYPE_SAE:
4052 auth_alg = WLAN_AUTH_SAE;
4053 break;
77fdaa12
JB		 4054 default:
4055 return -EOPNOTSUPP;
60f8b39c 4056 }
77fdaa12 4057
6b8ece3a
JM		 4058 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4059 req->ie_len, GFP_KERNEL);
66e67e41 4060 if (!auth_data)
9c6bd790 4061 return -ENOMEM;
77fdaa12 4062
66e67e41 4063 auth_data->bss = req->bss;
77fdaa12 4064
6b8ece3a
JM		 4065 if (req->sae_data_len >= 4) {
4066 __le16 *pos = (__le16 *) req->sae_data;
4067 auth_data->sae_trans = le16_to_cpu(pos[0]);
4068 auth_data->sae_status = le16_to_cpu(pos[1]);
4069 memcpy(auth_data->data, req->sae_data + 4,
4070 req->sae_data_len - 4);
4071 auth_data->data_len += req->sae_data_len - 4;
4072 }
4073
77fdaa12 4074 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4075 memcpy(&auth_data->data[auth_data->data_len],
4076 req->ie, req->ie_len);
4077 auth_data->data_len += req->ie_len;
9c6bd790 4078 }
77fdaa12 4079
fffd0934 4080 if (req->key && req->key_len) {
66e67e41
JB		 4081 auth_data->key_len = req->key_len;
4082 auth_data->key_idx = req->key_idx;
4083 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4084 }
4085
66e67e41 4086 auth_data->algorithm = auth_alg;
60f8b39c 4087
66e67e41 4088 /* try to authenticate/probe */
2a33bee2 4089
66e67e41
JB		 4090 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4091 ifmgd->assoc_data) {
4092 err = -EBUSY;
4093 goto err_free;
2a33bee2
GE		 4094 }
4095
66e67e41
JB		 4096 if (ifmgd->auth_data)
4097 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4098
66e67e41
JB		 4099 /* prep auth_data so we don't go into idle on disassoc */
4100 ifmgd->auth_data = auth_data;
af6b6374 4101
7b119dc0
JB		 4102 if (ifmgd->associated) {
4103 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4104
4105 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4106 WLAN_REASON_UNSPECIFIED,
4107 false, frame_buf);
4108
6ff57cf8
JB		 4109 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4110 sizeof(frame_buf));
7b119dc0 4111 }
af6b6374 4112
bdcbd8e0 4113 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4114
a1cf775d
JB		 4115 err = ieee80211_prep_connection(sdata, req->bss, false);
4116 if (err)
66e67e41 4117 goto err_clear;
af6b6374 4118
66e67e41
JB		 4119 err = ieee80211_probe_auth(sdata);
4120 if (err) {
66e67e41
JB		 4121 sta_info_destroy_addr(sdata, req->bss->bssid);
4122 goto err_clear;
4123 }
4124
4125 /* hold our own reference */
5b112d3d 4126 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4127 return 0;
66e67e41
JB		 4128
4129 err_clear:
3d2abdfd
EP		 4130 memset(ifmgd->bssid, 0, ETH_ALEN);
4131 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4132 ifmgd->auth_data = NULL;
4133 err_free:
4134 kfree(auth_data);
66e67e41 4135 return err;
af6b6374
JB		 4136}
4137
77fdaa12
JB		 4138int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4139 struct cfg80211_assoc_request *req)
f0706e82 4140{
66e67e41 4141 struct ieee80211_local *local = sdata->local;
77fdaa12 4142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4143 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4144 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4145 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4146 struct ieee80211_supported_band *sband;
b08fbbd8 4147 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4148 int i, err;
f0706e82 4149
66e67e41
JB		 4150 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4151 if (!assoc_data)
4152 return -ENOMEM;
4153
9caf0364
JB		 4154 rcu_read_lock();
4155 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4156 if (!ssidie) {
4157 rcu_read_unlock();
4158 kfree(assoc_data);
4159 return -EINVAL;
4160 }
4161 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4162 assoc_data->ssid_len = ssidie[1];
4163 rcu_read_unlock();
4164
7b119dc0
JB		 4165 if (ifmgd->associated) {
4166 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4167
4168 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4169 WLAN_REASON_UNSPECIFIED,
4170 false, frame_buf);
4171
6ff57cf8
JB		 4172 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4173 sizeof(frame_buf));
7b119dc0 4174 }
66e67e41
JB		 4175
4176 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4177 err = -EBUSY;
4178 goto err_free;
af6b6374 4179 }
77fdaa12 4180
66e67e41
JB		 4181 if (ifmgd->assoc_data) {
4182 err = -EBUSY;
4183 goto err_free;
4184 }
77fdaa12 4185
66e67e41
JB		 4186 if (ifmgd->auth_data) {
4187 bool match;
4188
4189 /* keep sta info, bssid if matching */
b203ca39 4190 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4191 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4192 }
4193
66e67e41 4194 /* prepare assoc data */
19c3b830 4195
d8ec4433
JO		 4196 ifmgd->beacon_crc_valid = false;
4197
de5036aa
JB		 4198 /*
4199 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4200 * We still associate in non-HT mode (11a/b/g) if any one of these
4201 * ciphers is configured as pairwise.
4202 * We can set this to true for non-11n hardware, that'll be checked
4203 * separately along with the peer capabilities.
4204 */
1c4cb928 4205 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4206 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4207 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4208 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4209 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4210 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4211 netdev_info(sdata->dev,
d545daba 4212 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4213 }
4214 }
77fdaa12 4215
d545daba 4216 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4217 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4218 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4219 }
ef96a842 4220
dd5ecfea
JB		 4221 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4222 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4223
4e74bfdb
JB		 4224 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4225 sband = local->hw.wiphy->bands[req->bss->channel->band];
4226 if (!sband->ht_cap.ht_supported ||
1c4cb928 4227 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4228 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4229 if (!bss->wmm_used)
4230 netdev_info(sdata->dev,
4231 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4232 }
4e74bfdb 4233
d545daba
MP		 4234 /* disable VHT if we don't support it or the AP doesn't use WMM */
4235 if (!sband->vht_cap.vht_supported ||
4236 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4237 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4238 if (!bss->wmm_used)
4239 netdev_info(sdata->dev,
4240 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4241 }
4242
ef96a842
BG		 4243 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4244 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4245 sizeof(ifmgd->ht_capa_mask));
4246
dd5ecfea
JB		 4247 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4248 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4249 sizeof(ifmgd->vht_capa_mask));
4250
77fdaa12 4251 if (req->ie && req->ie_len) {
66e67e41
JB		 4252 memcpy(assoc_data->ie, req->ie, req->ie_len);
4253 assoc_data->ie_len = req->ie_len;
4254 }
f679f65d 4255
66e67e41 4256 assoc_data->bss = req->bss;
f679f65d 4257
af6b6374
JB		 4258 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4259 if (ifmgd->powersave)
04ecd257 4260 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4261 else
04ecd257 4262 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4263 } else
04ecd257 4264 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4265
66e67e41 4266 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4267 assoc_data->wmm = bss->wmm_used &&
4268 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4269 assoc_data->supp_rates = bss->supp_rates;
4270 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4271
9caf0364 4272 rcu_read_lock();
9dde6423
JB		 4273 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4274 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4275 assoc_data->ap_ht_param =
4276 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4277 else
a8243b72 4278 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4279 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4280 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4281 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4282 sizeof(struct ieee80211_vht_cap));
4283 else
4284 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4285 rcu_read_unlock();
63f170e0 4286
ab13315a 4287 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4288 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4289 sdata->wmm_acm != 0xff) {
76f0303d 4290 assoc_data->uapsd = true;
ab13315a
KV		 4291 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4292 } else {
76f0303d 4293 assoc_data->uapsd = false;
ab13315a
KV		 4294 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4295 }
4296
77fdaa12 4297 if (req->prev_bssid)
66e67e41 4298 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4299
4300 if (req->use_mfp) {
4301 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4302 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4303 } else {
4304 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4305 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4306 }
4307
4308 if (req->crypto.control_port)
4309 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4310 else
4311 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4312
a621fa4d
JB		 4313 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4314 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4315
66e67e41
JB		 4316 /* kick off associate process */
4317
4318 ifmgd->assoc_data = assoc_data;
826262c3 4319 ifmgd->dtim_period = 0;
989c6505 4320 ifmgd->have_beacon = false;
66e67e41 4321
a1cf775d
JB		 4322 err = ieee80211_prep_connection(sdata, req->bss, true);
4323 if (err)
4324 goto err_clear;
66e67e41 4325
c65dd147
EG		 4326 rcu_read_lock();
4327 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4328
c65dd147
EG		 4329 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4330 !beacon_ies) {
4331 /*
4332 * Wait up to one beacon interval ...
4333 * should this be more if we miss one?
4334 */
4335 sdata_info(sdata, "waiting for beacon from %pM\n",
4336 ifmgd->bssid);
4337 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4338 assoc_data->timeout_started = true;
c65dd147
EG		 4339 assoc_data->need_beacon = true;
4340 } else if (beacon_ies) {
4341 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4342 beacon_ies->data,
4343 beacon_ies->len);
ef429dad
JB		 4344 u8 dtim_count = 0;
4345
c65dd147
EG		 4346 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4347 const struct ieee80211_tim_ie *tim;
4348 tim = (void *)(tim_ie + 2);
4349 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4350 dtim_count = tim->dtim_count;
826262c3 4351 }
989c6505 4352 ifmgd->have_beacon = true;
66e67e41 4353 assoc_data->timeout = jiffies;
89afe614 4354 assoc_data->timeout_started = true;
ef429dad
JB		 4355
4356 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4357 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4358 sdata->vif.bss_conf.sync_device_ts =
4359 bss->device_ts_beacon;
4360 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4361 }
c65dd147
EG		 4362 } else {
4363 assoc_data->timeout = jiffies;
89afe614 4364 assoc_data->timeout_started = true;
66e67e41 4365 }
c65dd147
EG		 4366 rcu_read_unlock();
4367
8d61ffa5 4368 run_again(sdata, assoc_data->timeout);
66e67e41 4369
fcff4f10
PS		 4370 if (bss->corrupt_data) {
4371 char *corrupt_type = "data";
4372 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4373 if (bss->corrupt_data &
4374 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4375 corrupt_type = "beacon and probe response";
4376 else
4377 corrupt_type = "beacon";
4378 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4379 corrupt_type = "probe response";
bdcbd8e0
JB		 4380 sdata_info(sdata, "associating with AP with corrupt %s\n",
4381 corrupt_type);
fcff4f10
PS		 4382 }
4383
8d61ffa5 4384 return 0;
66e67e41 4385 err_clear:
3d2abdfd
EP		 4386 memset(ifmgd->bssid, 0, ETH_ALEN);
4387 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4388 ifmgd->assoc_data = NULL;
4389 err_free:
4390 kfree(assoc_data);
66e67e41 4391 return err;
f0706e82
JB		 4392}
4393
77fdaa12 4394int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4395 struct cfg80211_deauth_request *req)
f0706e82 4396{
46900298 4397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4398 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4399 bool tx = !req->local_state_change;
de3d43a3 4400 bool report_frame = false;
f0706e82 4401
bdcbd8e0
JB		 4402 sdata_info(sdata,
4403 "deauthenticating from %pM by local choice (reason=%d)\n",
4404 req->bssid, req->reason_code);
0ff71613 4405
86552017 4406 if (ifmgd->auth_data) {
8c7d857c 4407 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4408 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4409 IEEE80211_STYPE_DEAUTH,
6863255b 4410 req->reason_code, tx,
37ad3888 4411 frame_buf);
86552017 4412 ieee80211_destroy_auth_data(sdata, false);
86552017 4413
de3d43a3 4414 report_frame = true;
86552017 4415 goto out;
8c7d857c
EG		 4416 }
4417
86552017
JB		 4418 if (ifmgd->associated &&
4419 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4420 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4421 req->reason_code, tx, frame_buf);
de3d43a3 4422 report_frame = true;
86552017 4423 }
37ad3888 4424
86552017 4425 out:
de3d43a3 4426 if (report_frame)
6ff57cf8
JB		 4427 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4428 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4429
f0706e82
JB		 4430 return 0;
4431}
84363e6e 4432
77fdaa12 4433int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4434 struct cfg80211_disassoc_request *req)
9c6bd790 4435{
77fdaa12 4436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4437 u8 bssid[ETH_ALEN];
6ae16775 4438 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4439
8d8b261a
JB		 4440 /*
4441 * cfg80211 should catch this ... but it's racy since
4442 * we can receive a disassoc frame, process it, hand it
4443 * to cfg80211 while that's in a locked section already
4444 * trying to tell us that the user wants to disconnect.
4445 */
8d61ffa5 4446 if (ifmgd->associated != req->bss)
77fdaa12 4447 return -ENOLINK;
77fdaa12 4448
bdcbd8e0
JB		 4449 sdata_info(sdata,
4450 "disassociating from %pM by local choice (reason=%d)\n",
4451 req->bss->bssid, req->reason_code);
0ff71613 4452
e69e95db 4453 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4454 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4455 req->reason_code, !req->local_state_change,
4456 frame_buf);
10f644a4 4457
6ff57cf8
JB		 4458 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4459 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4460
10f644a4
JB		 4461 return 0;
4462}
026331c4 4463
afa762f6 4464void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4465{
4466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4467
49921859
BG		 4468 /*
4469 * Make sure some work items will not run after this,
4470 * they will not do anything but might not have been
4471 * cancelled when disconnecting.
4472 */
4473 cancel_work_sync(&ifmgd->monitor_work);
4474 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4475 cancel_work_sync(&ifmgd->request_smps_work);
4476 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4477 cancel_work_sync(&ifmgd->chswitch_work);
4478
8d61ffa5 4479 sdata_lock(sdata);
959867fa
JB		 4480 if (ifmgd->assoc_data) {
4481 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4482 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4483 cfg80211_assoc_timeout(sdata->dev, bss);
4484 }
54e4ffb2
JB		 4485 if (ifmgd->auth_data)
4486 ieee80211_destroy_auth_data(sdata, false);
4487 del_timer_sync(&ifmgd->timer);
8d61ffa5 4488 sdata_unlock(sdata);
54e4ffb2
JB		 4489}
4490
a97c13c3
JO		 4491void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4492 enum nl80211_cqm_rssi_threshold_event rssi_event,
4493 gfp_t gfp)
4494{
4495 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4496
b5878a2d
JB		 4497 trace_api_cqm_rssi_notify(sdata, rssi_event);
4498
a97c13c3
JO		 4499 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4500}
4501EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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