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Merge tag 'v3.10.94' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.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)
e0f23666 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)
e0f23666 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
77fdaa12
JB		 95/*
96 * All cfg80211 functions have to be called outside a locked
97 * section so that they can acquire a lock themselves... This
98 * is much simpler than queuing up things in cfg80211, but we
99 * do need some indirection for that here.
100 */
101enum rx_mgmt_action {
102 /* no action required */
103 RX_MGMT_NONE,
104
77fdaa12
JB		 105 /* caller must call cfg80211_send_deauth() */
106 RX_MGMT_CFG80211_DEAUTH,
107
108 /* caller must call cfg80211_send_disassoc() */
109 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 110
111 /* caller must call cfg80211_send_rx_auth() */
112 RX_MGMT_CFG80211_RX_AUTH,
113
114 /* caller must call cfg80211_send_rx_assoc() */
115 RX_MGMT_CFG80211_RX_ASSOC,
116
117 /* caller must call cfg80211_send_assoc_timeout() */
118 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 119
120 /* used when a processed beacon causes a deauth */
121 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 122};
123
5484e237 124/* utils */
77fdaa12
JB		 125static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
126{
46a5ebaf 127 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 128}
129
ca386f31
JB		 130/*
131 * We can have multiple work items (and connection probing)
132 * scheduling this timer, but we need to take care to only
133 * reschedule it when it should fire _earlier_ than it was
134 * asked for before, or if it's not pending right now. This
135 * function ensures that. Note that it then is required to
136 * run this function for all timeouts after the first one
137 * has happened -- the work that runs from this timer will
138 * do that.
139 */
66e67e41 140static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 141{
142 ASSERT_MGD_MTX(ifmgd);
143
144 if (!timer_pending(&ifmgd->timer) ||
145 time_before(timeout, ifmgd->timer.expires))
146 mod_timer(&ifmgd->timer, timeout);
147}
148
d3a910a8 149void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 150{
c1288b12 151 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 152 return;
153
7eeff74c
JB		 154 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
155 return;
156
b291ba11 157 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 158 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 159}
160
be099e82
LR		 161void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
162{
0c699c3a
LR		 163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
164
8628172f
SG		 165 if (unlikely(!sdata->u.mgd.associated))
166 return;
167
be099e82
LR		 168 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
169 return;
170
171 mod_timer(&sdata->u.mgd.conn_mon_timer,
172 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 173
174 ifmgd->probe_send_count = 0;
be099e82
LR		 175}
176
5484e237 177static int ecw2cw(int ecw)
60f8b39c 178{
5484e237 179 return (1 << ecw) - 1;
60f8b39c
JB		 180}
181
6565ec9b
JB		 182static u32 chandef_downgrade(struct cfg80211_chan_def *c)
183{
184 u32 ret;
185 int tmp;
186
187 switch (c->width) {
188 case NL80211_CHAN_WIDTH_20:
189 c->width = NL80211_CHAN_WIDTH_20_NOHT;
190 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
191 break;
192 case NL80211_CHAN_WIDTH_40:
193 c->width = NL80211_CHAN_WIDTH_20;
194 c->center_freq1 = c->chan->center_freq;
195 ret = IEEE80211_STA_DISABLE_40MHZ |
196 IEEE80211_STA_DISABLE_VHT;
197 break;
198 case NL80211_CHAN_WIDTH_80:
199 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
200 /* n_P40 */
201 tmp /= 2;
202 /* freq_P40 */
203 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
204 c->width = NL80211_CHAN_WIDTH_40;
205 ret = IEEE80211_STA_DISABLE_VHT;
206 break;
207 case NL80211_CHAN_WIDTH_80P80:
208 c->center_freq2 = 0;
209 c->width = NL80211_CHAN_WIDTH_80;
210 ret = IEEE80211_STA_DISABLE_80P80MHZ |
211 IEEE80211_STA_DISABLE_160MHZ;
212 break;
213 case NL80211_CHAN_WIDTH_160:
214 /* n_P20 */
215 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
216 /* n_P80 */
217 tmp /= 4;
218 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
219 c->width = NL80211_CHAN_WIDTH_80;
220 ret = IEEE80211_STA_DISABLE_80P80MHZ |
221 IEEE80211_STA_DISABLE_160MHZ;
222 break;
223 default:
224 case NL80211_CHAN_WIDTH_20_NOHT:
225 WARN_ON_ONCE(1);
226 c->width = NL80211_CHAN_WIDTH_20_NOHT;
227 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
228 break;
229 }
230
231 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
232
233 return ret;
234}
235
236static u32
237ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
238 struct ieee80211_supported_band *sband,
239 struct ieee80211_channel *channel,
240 const struct ieee80211_ht_operation *ht_oper,
241 const struct ieee80211_vht_operation *vht_oper,
7febdf14 242 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 243{
7febdf14 244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 245 struct cfg80211_chan_def vht_chandef;
246 u32 ht_cfreq, ret;
247
248 chandef->chan = channel;
249 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
250 chandef->center_freq1 = channel->center_freq;
251 chandef->center_freq2 = 0;
252
253 if (!ht_oper || !sband->ht_cap.ht_supported) {
254 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
255 goto out;
256 }
257
258 chandef->width = NL80211_CHAN_WIDTH_20;
259
260 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
261 channel->band);
262 /* check that channel matches the right operating channel */
7febdf14 263 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 264 /*
265 * It's possible that some APs are confused here;
266 * Netgear WNDR3700 sometimes reports 4 higher than
267 * the actual channel in association responses, but
268 * since we look at probe response/beacon data here
269 * it should be OK.
270 */
7febdf14
JB		 271 sdata_info(sdata,
272 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
273 channel->center_freq, ht_cfreq,
274 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 275 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
276 goto out;
277 }
278
279 /* check 40 MHz support, if we have it */
280 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
281 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
282 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
283 chandef->width = NL80211_CHAN_WIDTH_40;
284 chandef->center_freq1 += 10;
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 chandef->width = NL80211_CHAN_WIDTH_40;
288 chandef->center_freq1 -= 10;
289 break;
290 }
291 } else {
292 /* 40 MHz (and 80 MHz) must be supported for VHT */
293 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 294 /* also mark 40 MHz disabled */
295 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 296 goto out;
297 }
298
299 if (!vht_oper || !sband->vht_cap.vht_supported) {
300 ret = IEEE80211_STA_DISABLE_VHT;
301 goto out;
302 }
303
304 vht_chandef.chan = channel;
305 vht_chandef.center_freq1 =
306 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
307 channel->band);
308 vht_chandef.center_freq2 = 0;
309
6565ec9b
JB		 310 switch (vht_oper->chan_width) {
311 case IEEE80211_VHT_CHANWIDTH_USE_HT:
312 vht_chandef.width = chandef->width;
c02d9a96 313 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 314 break;
315 case IEEE80211_VHT_CHANWIDTH_80MHZ:
316 vht_chandef.width = NL80211_CHAN_WIDTH_80;
317 break;
318 case IEEE80211_VHT_CHANWIDTH_160MHZ:
319 vht_chandef.width = NL80211_CHAN_WIDTH_160;
320 break;
321 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
322 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 323 vht_chandef.center_freq2 =
324 ieee80211_channel_to_frequency(
325 vht_oper->center_freq_seg2_idx,
326 channel->band);
6565ec9b
JB		 327 break;
328 default:
7febdf14 329 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 330 sdata_info(sdata,
331 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
332 vht_oper->chan_width);
6565ec9b
JB		 333 ret = IEEE80211_STA_DISABLE_VHT;
334 goto out;
335 }
336
337 if (!cfg80211_chandef_valid(&vht_chandef)) {
7febdf14 338 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 339 sdata_info(sdata,
340 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 341 ret = IEEE80211_STA_DISABLE_VHT;
342 goto out;
343 }
344
345 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
346 ret = 0;
347 goto out;
348 }
349
350 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
7febdf14 351 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 352 sdata_info(sdata,
353 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 354 ret = IEEE80211_STA_DISABLE_VHT;
355 goto out;
356 }
357
358 *chandef = vht_chandef;
359
360 ret = 0;
361
362out:
e713fe3d
JB		 363 /*
364 * When tracking the current AP, don't do any further checks if the
365 * new chandef is identical to the one we're currently using for the
366 * connection. This keeps us from playing ping-pong with regulatory,
367 * without it the following can happen (for example):
368 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
369 * - AP advertises regdom US
370 * - CRDA loads regdom US with 80 MHz prohibited (old database)
371 * - the code below detects an unsupported channel, downgrades, and
372 * we disconnect from the AP in the caller
373 * - disconnect causes CRDA to reload world regdomain and the game
374 * starts anew.
375 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
376 *
377 * It seems possible that there are still scenarios with CSA or real
378 * bandwidth changes where a this could happen, but those cases are
379 * less common and wouldn't completely prevent using the AP.
380 */
381 if (tracking &&
382 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
383 return ret;
384
586e01ed
JB		 385 /* don't print the message below for VHT mismatch if VHT is disabled */
386 if (ret & IEEE80211_STA_DISABLE_VHT)
387 vht_chandef = *chandef;
388
775f521c
JB		 389 /*
390 * Ignore the DISABLED flag when we're already connected and only
391 * tracking the APs beacon for bandwidth changes - otherwise we
392 * might get disconnected here if we connect to an AP, update our
393 * regulatory information based on the AP's country IE and the
394 * information we have is wrong/outdated and disables the channel
395 * that we're actually using for the connection to the AP.
396 */
6565ec9b 397 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
775f521c
JB		 398 tracking ? 0 :
399 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 400 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
401 ret = IEEE80211_STA_DISABLE_HT |
402 IEEE80211_STA_DISABLE_VHT;
42c8df37 403 break;
6565ec9b
JB		 404 }
405
406 ret |= chandef_downgrade(chandef);
407 }
408
7febdf14 409 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 410 sdata_info(sdata,
411 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
412
413 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
414 return ret;
415}
416
30eb1dc2
JB		 417static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
418 struct sta_info *sta,
419 const struct ieee80211_ht_operation *ht_oper,
420 const struct ieee80211_vht_operation *vht_oper,
421 const u8 *bssid, u32 *changed)
d5522e03
JB		 422{
423 struct ieee80211_local *local = sdata->local;
30eb1dc2 424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 425 struct ieee80211_supported_band *sband;
55de908a 426 struct ieee80211_channel *chan;
30eb1dc2 427 struct cfg80211_chan_def chandef;
9ed6bcce 428 u16 ht_opmode;
30eb1dc2
JB		 429 u32 flags;
430 enum ieee80211_sta_rx_bandwidth new_sta_bw;
431 int ret;
d5522e03 432
30eb1dc2
JB		 433 /* if HT was/is disabled, don't track any bandwidth changes */
434 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 435 return 0;
436
30eb1dc2
JB		 437 /* don't check VHT if we associated as non-VHT station */
438 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
439 vht_oper = NULL;
440
441 if (WARN_ON_ONCE(!sta))
442 return -EINVAL;
443
f2d9330e 444 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 445 sband = local->hw.wiphy->bands[chan->band];
d5522e03 446
30eb1dc2
JB		 447 /* calculate new channel (type) based on HT/VHT operation IEs */
448 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
7febdf14 449 vht_oper, &chandef, true);
30eb1dc2
JB		 450
451 /*
452 * Downgrade the new channel if we associated with restricted
453 * capabilities. For example, if we associated as a 20 MHz STA
454 * to a 40 MHz AP (due to regulatory, capabilities or config
455 * reasons) then switching to a 40 MHz channel now won't do us
456 * any good -- we couldn't use it with the AP.
457 */
458 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
459 chandef.width == NL80211_CHAN_WIDTH_80P80)
460 flags |= chandef_downgrade(&chandef);
461 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
462 chandef.width == NL80211_CHAN_WIDTH_160)
463 flags |= chandef_downgrade(&chandef);
464 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
465 chandef.width > NL80211_CHAN_WIDTH_20)
466 flags |= chandef_downgrade(&chandef);
467
468 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
469 return 0;
470
471 sdata_info(sdata,
472 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
473 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
474 chandef.center_freq1, chandef.center_freq2);
475
476 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
477 IEEE80211_STA_DISABLE_VHT |
478 IEEE80211_STA_DISABLE_40MHZ |
479 IEEE80211_STA_DISABLE_80P80MHZ |
480 IEEE80211_STA_DISABLE_160MHZ)) ||
481 !cfg80211_chandef_valid(&chandef)) {
482 sdata_info(sdata,
483 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
484 ifmgd->bssid);
485 return -EINVAL;
486 }
487
488 switch (chandef.width) {
489 case NL80211_CHAN_WIDTH_20_NOHT:
490 case NL80211_CHAN_WIDTH_20:
491 new_sta_bw = IEEE80211_STA_RX_BW_20;
492 break;
4bf88530 493 case NL80211_CHAN_WIDTH_40:
30eb1dc2 494 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 495 break;
30eb1dc2
JB		 496 case NL80211_CHAN_WIDTH_80:
497 new_sta_bw = IEEE80211_STA_RX_BW_80;
498 break;
499 case NL80211_CHAN_WIDTH_80P80:
500 case NL80211_CHAN_WIDTH_160:
501 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 502 break;
30eb1dc2
JB		 503 default:
504 return -EINVAL;
64f68e5d 505 }
d5522e03 506
30eb1dc2
JB		 507 if (new_sta_bw > sta->cur_max_bandwidth)
508 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 509
30eb1dc2
JB		 510 if (new_sta_bw < sta->sta.bandwidth) {
511 sta->sta.bandwidth = new_sta_bw;
512 rate_control_rate_update(local, sband, sta,
513 IEEE80211_RC_BW_CHANGED);
514 }
64f68e5d 515
30eb1dc2
JB		 516 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
517 if (ret) {
518 sdata_info(sdata,
519 "AP %pM changed bandwidth to incompatible one - disconnect\n",
520 ifmgd->bssid);
521 return ret;
522 }
7cc44ed4 523
30eb1dc2
JB		 524 if (new_sta_bw > sta->sta.bandwidth) {
525 sta->sta.bandwidth = new_sta_bw;
526 rate_control_rate_update(local, sband, sta,
527 IEEE80211_RC_BW_CHANGED);
0aaffa9b 528 }
d5522e03 529
074d46d1 530 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 531
532 /* if bss configuration changed store the new one */
30eb1dc2
JB		 533 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
534 *changed |= BSS_CHANGED_HT;
9ed6bcce 535 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 536 }
537
30eb1dc2 538 return 0;
d5522e03
JB		 539}
540
9c6bd790
JB		 541/* frame sending functions */
542
66e67e41
JB		 543static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
544 struct ieee80211_supported_band *sband,
545 u32 *rates)
546{
547 int i, j, count;
548 *rates = 0;
549 count = 0;
550 for (i = 0; i < supp_rates_len; i++) {
551 int rate = (supp_rates[i] & 0x7F) * 5;
552
553 for (j = 0; j < sband->n_bitrates; j++)
554 if (sband->bitrates[j].bitrate == rate) {
555 *rates |= BIT(j);
556 count++;
557 break;
558 }
559 }
560
561 return count;
562}
563
564static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 565 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 566 struct ieee80211_supported_band *sband,
567 struct ieee80211_channel *channel,
568 enum ieee80211_smps_mode smps)
569{
66e67e41
JB		 570 u8 *pos;
571 u32 flags = channel->flags;
572 u16 cap;
573 struct ieee80211_sta_ht_cap ht_cap;
574
575 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
576
66e67e41
JB		 577 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
578 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
579
66e67e41
JB		 580 /* determine capability flags */
581 cap = ht_cap.cap;
582
9dde6423 583 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 584 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
585 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
586 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
587 cap &= ~IEEE80211_HT_CAP_SGI_40;
588 }
589 break;
590 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
591 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
592 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
593 cap &= ~IEEE80211_HT_CAP_SGI_40;
594 }
595 break;
596 }
597
24398e39
JB		 598 /*
599 * If 40 MHz was disabled associate as though we weren't
600 * capable of 40 MHz -- some broken APs will never fall
601 * back to trying to transmit in 20 MHz.
602 */
603 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
604 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
605 cap &= ~IEEE80211_HT_CAP_SGI_40;
606 }
607
66e67e41
JB		 608 /* set SM PS mode properly */
609 cap &= ~IEEE80211_HT_CAP_SM_PS;
610 switch (smps) {
611 case IEEE80211_SMPS_AUTOMATIC:
612 case IEEE80211_SMPS_NUM_MODES:
613 WARN_ON(1);
614 case IEEE80211_SMPS_OFF:
615 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
616 IEEE80211_HT_CAP_SM_PS_SHIFT;
617 break;
618 case IEEE80211_SMPS_STATIC:
619 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
620 IEEE80211_HT_CAP_SM_PS_SHIFT;
621 break;
622 case IEEE80211_SMPS_DYNAMIC:
623 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
624 IEEE80211_HT_CAP_SM_PS_SHIFT;
625 break;
626 }
627
628 /* reserve and fill IE */
629 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
630 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
631}
632
d545daba
MP		 633static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
634 struct sk_buff *skb,
b08fbbd8
JB		 635 struct ieee80211_supported_band *sband,
636 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 637{
638 u8 *pos;
639 u32 cap;
640 struct ieee80211_sta_vht_cap vht_cap;
641
642 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
643
644 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 645 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 646
647 /* determine capability flags */
648 cap = vht_cap.cap;
649
f2d9d270
JB		 650 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
651 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
652 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
653 }
654
655 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
656 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
657 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
658 }
659
b08fbbd8
JB		 660 /*
661 * Some APs apparently get confused if our capabilities are better
662 * than theirs, so restrict what we advertise in the assoc request.
663 */
664 if (!(ap_vht_cap->vht_cap_info &
665 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
666 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
667
d545daba 668 /* reserve and fill IE */
d4950281 669 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 670 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
671}
672
66e67e41
JB		 673static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
674{
675 struct ieee80211_local *local = sdata->local;
676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
677 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
678 struct sk_buff *skb;
679 struct ieee80211_mgmt *mgmt;
680 u8 *pos, qos_info;
681 size_t offset = 0, noffset;
682 int i, count, rates_len, supp_rates_len;
683 u16 capab;
684 struct ieee80211_supported_band *sband;
55de908a
JB		 685 struct ieee80211_chanctx_conf *chanctx_conf;
686 struct ieee80211_channel *chan;
66e67e41 687 u32 rates = 0;
66e67e41
JB		 688
689 lockdep_assert_held(&ifmgd->mtx);
690
55de908a
JB		 691 rcu_read_lock();
692 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
693 if (WARN_ON(!chanctx_conf)) {
694 rcu_read_unlock();
695 return;
696 }
4bf88530 697 chan = chanctx_conf->def.chan;
55de908a
JB		 698 rcu_read_unlock();
699 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 700
701 if (assoc_data->supp_rates_len) {
702 /*
703 * Get all rates supported by the device and the AP as
704 * some APs don't like getting a superset of their rates
705 * in the association request (e.g. D-Link DAP 1353 in
706 * b-only mode)...
707 */
708 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
709 assoc_data->supp_rates_len,
710 sband, &rates);
711 } else {
712 /*
713 * In case AP not provide any supported rates information
714 * before association, we send information element(s) with
715 * all rates that we support.
716 */
717 rates = ~0;
718 rates_len = sband->n_bitrates;
719 }
720
721 skb = alloc_skb(local->hw.extra_tx_headroom +
722 sizeof(*mgmt) + /* bit too much but doesn't matter */
723 2 + assoc_data->ssid_len + /* SSID */
724 4 + rates_len + /* (extended) rates */
725 4 + /* power capability */
726 2 + 2 * sband->n_channels + /* supported channels */
727 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 728 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 729 assoc_data->ie_len + /* extra IEs */
730 9, /* WMM */
731 GFP_KERNEL);
732 if (!skb)
733 return;
734
735 skb_reserve(skb, local->hw.extra_tx_headroom);
736
737 capab = WLAN_CAPABILITY_ESS;
738
739 if (sband->band == IEEE80211_BAND_2GHZ) {
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
742 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
743 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
744 }
745
746 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
747 capab |= WLAN_CAPABILITY_PRIVACY;
748
749 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
750 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
751 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
752
753 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
754 memset(mgmt, 0, 24);
755 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
756 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
757 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
758
759 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
760 skb_put(skb, 10);
761 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
762 IEEE80211_STYPE_REASSOC_REQ);
763 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
764 mgmt->u.reassoc_req.listen_interval =
765 cpu_to_le16(local->hw.conf.listen_interval);
766 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
767 ETH_ALEN);
768 } else {
769 skb_put(skb, 4);
770 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
771 IEEE80211_STYPE_ASSOC_REQ);
772 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
773 mgmt->u.assoc_req.listen_interval =
774 cpu_to_le16(local->hw.conf.listen_interval);
775 }
776
777 /* SSID */
778 pos = skb_put(skb, 2 + assoc_data->ssid_len);
779 *pos++ = WLAN_EID_SSID;
780 *pos++ = assoc_data->ssid_len;
781 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
782
783 /* add all rates which were marked to be used above */
784 supp_rates_len = rates_len;
785 if (supp_rates_len > 8)
786 supp_rates_len = 8;
787
788 pos = skb_put(skb, supp_rates_len + 2);
789 *pos++ = WLAN_EID_SUPP_RATES;
790 *pos++ = supp_rates_len;
791
792 count = 0;
793 for (i = 0; i < sband->n_bitrates; i++) {
794 if (BIT(i) & rates) {
795 int rate = sband->bitrates[i].bitrate;
796 *pos++ = (u8) (rate / 5);
797 if (++count == 8)
798 break;
799 }
800 }
801
802 if (rates_len > count) {
803 pos = skb_put(skb, rates_len - count + 2);
804 *pos++ = WLAN_EID_EXT_SUPP_RATES;
805 *pos++ = rates_len - count;
806
807 for (i++; i < sband->n_bitrates; i++) {
808 if (BIT(i) & rates) {
809 int rate = sband->bitrates[i].bitrate;
810 *pos++ = (u8) (rate / 5);
811 }
812 }
813 }
814
815 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
816 /* 1. power capabilities */
817 pos = skb_put(skb, 4);
818 *pos++ = WLAN_EID_PWR_CAPABILITY;
819 *pos++ = 2;
820 *pos++ = 0; /* min tx power */
55de908a 821 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 822
823 /* 2. supported channels */
824 /* TODO: get this in reg domain format */
825 pos = skb_put(skb, 2 * sband->n_channels + 2);
826 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
827 *pos++ = 2 * sband->n_channels;
828 for (i = 0; i < sband->n_channels; i++) {
829 *pos++ = ieee80211_frequency_to_channel(
830 sband->channels[i].center_freq);
831 *pos++ = 1; /* one channel in the subband*/
832 }
833 }
834
835 /* if present, add any custom IEs that go before HT */
836 if (assoc_data->ie_len && assoc_data->ie) {
837 static const u8 before_ht[] = {
838 WLAN_EID_SSID,
839 WLAN_EID_SUPP_RATES,
840 WLAN_EID_EXT_SUPP_RATES,
841 WLAN_EID_PWR_CAPABILITY,
842 WLAN_EID_SUPPORTED_CHANNELS,
843 WLAN_EID_RSN,
844 WLAN_EID_QOS_CAPA,
845 WLAN_EID_RRM_ENABLED_CAPABILITIES,
846 WLAN_EID_MOBILITY_DOMAIN,
847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848 };
849 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
850 before_ht, ARRAY_SIZE(before_ht),
851 offset);
852 pos = skb_put(skb, noffset - offset);
853 memcpy(pos, assoc_data->ie + offset, noffset - offset);
854 offset = noffset;
855 }
856
f2d9d270
JB		 857 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
858 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
859 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
860
a8243b72 861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 862 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 863 sband, chan, sdata->smps_mode);
66e67e41 864
d545daba 865 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 866 ieee80211_add_vht_ie(sdata, skb, sband,
867 &assoc_data->ap_vht_cap);
d545daba 868
66e67e41
JB		 869 /* if present, add any custom non-vendor IEs that go after HT */
870 if (assoc_data->ie_len && assoc_data->ie) {
871 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
872 assoc_data->ie_len,
873 offset);
874 pos = skb_put(skb, noffset - offset);
875 memcpy(pos, assoc_data->ie + offset, noffset - offset);
876 offset = noffset;
877 }
878
76f0303d
JB		 879 if (assoc_data->wmm) {
880 if (assoc_data->uapsd) {
dc41e4d4
EP		 881 qos_info = ifmgd->uapsd_queues;
882 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 883 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
884 } else {
885 qos_info = 0;
886 }
887
888 pos = skb_put(skb, 9);
889 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
890 *pos++ = 7; /* len */
891 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
892 *pos++ = 0x50;
893 *pos++ = 0xf2;
894 *pos++ = 2; /* WME */
895 *pos++ = 0; /* WME info */
896 *pos++ = 1; /* WME ver */
897 *pos++ = qos_info;
898 }
899
900 /* add any remaining custom (i.e. vendor specific here) IEs */
901 if (assoc_data->ie_len && assoc_data->ie) {
902 noffset = assoc_data->ie_len;
903 pos = skb_put(skb, noffset - offset);
904 memcpy(pos, assoc_data->ie + offset, noffset - offset);
905 }
906
a1845fc7
JB		 907 drv_mgd_prepare_tx(local, sdata);
908
66e67e41 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 910 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
911 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
912 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 913 ieee80211_tx_skb(sdata, skb);
914}
915
572e0012
KV		 916void ieee80211_send_pspoll(struct ieee80211_local *local,
917 struct ieee80211_sub_if_data *sdata)
918{
572e0012
KV		 919 struct ieee80211_pspoll *pspoll;
920 struct sk_buff *skb;
572e0012 921
d8cd189e
KV		 922 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
923 if (!skb)
572e0012 924 return;
572e0012 925
d8cd189e
KV		 926 pspoll = (struct ieee80211_pspoll *) skb->data;
927 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 928
62ae67be
JB		 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
930 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 931}
932
965bedad
JB		 933void ieee80211_send_nullfunc(struct ieee80211_local *local,
934 struct ieee80211_sub_if_data *sdata,
935 int powersave)
936{
937 struct sk_buff *skb;
d8cd189e 938 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 940
d8cd189e
KV		 941 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
942 if (!skb)
965bedad 943 return;
965bedad 944
d8cd189e 945 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 946 if (powersave)
d8cd189e 947 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 948
6c17b77b
SF		 949 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
950 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 951 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
952 IEEE80211_STA_CONNECTION_POLL))
953 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
954
62ae67be 955 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 956}
957
d524215f
FF		 958static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
959 struct ieee80211_sub_if_data *sdata)
960{
961 struct sk_buff *skb;
962 struct ieee80211_hdr *nullfunc;
963 __le16 fc;
964
965 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
966 return;
967
968 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 969 if (!skb)
d524215f 970 return;
d15b8459 971
d524215f
FF		 972 skb_reserve(skb, local->hw.extra_tx_headroom);
973
974 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
975 memset(nullfunc, 0, 30);
976 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
977 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
978 nullfunc->frame_control = fc;
979 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
980 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
981 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
982 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
983
984 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
985 ieee80211_tx_skb(sdata, skb);
986}
987
cc32abd4
JB		 988/* spectrum management related things */
989static void ieee80211_chswitch_work(struct work_struct *work)
990{
991 struct ieee80211_sub_if_data *sdata =
992 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 993 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
995
9607e6b6 996 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 997 return;
998
77fdaa12
JB		 999 mutex_lock(&ifmgd->mtx);
1000 if (!ifmgd->associated)
1001 goto out;
cc32abd4 1002
85220d71 1003 local->_oper_chandef = local->csa_chandef;
675a0b04
KB		 1004
1005 if (!local->ops->channel_switch) {
5ce6e438 1006 /* call "hw_config" only if doing sw channel switch */
675a0b04 1007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1008 } else {
1009 /* update the device channel directly */
675a0b04 1010 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 1011 }
77fdaa12 1012
cc32abd4 1013 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 1014 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 1015
57eebdf3 1016 /* XXX: wait for a beacon first? */
675a0b04 1017 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1018 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 1019 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1020 out:
1021 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1022 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1023}
1024
5ce6e438
JB		 1025void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1026{
55de908a
JB		 1027 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1029
1030 trace_api_chswitch_done(sdata, success);
1031 if (!success) {
882a7c69
JB		 1032 sdata_info(sdata,
1033 "driver channel switch failed, disconnecting\n");
1034 ieee80211_queue_work(&sdata->local->hw,
1035 &ifmgd->csa_connection_drop_work);
1036 } else {
1037 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1038 }
5ce6e438
JB		 1039}
1040EXPORT_SYMBOL(ieee80211_chswitch_done);
1041
cc32abd4
JB		 1042static void ieee80211_chswitch_timer(unsigned long data)
1043{
1044 struct ieee80211_sub_if_data *sdata =
1045 (struct ieee80211_sub_if_data *) data;
5bb644a0 1046
9b7d72c1 1047 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1048}
1049
37799e52 1050static void
4a3cb702 1051ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
3670946f
JB		 1052 u64 timestamp, struct ieee802_11_elems *elems,
1053 bool beacon)
cc32abd4 1054{
b4f286a1 1055 struct ieee80211_local *local = sdata->local;
cc32abd4 1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52
JB		 1057 struct cfg80211_bss *cbss = ifmgd->associated;
1058 struct ieee80211_bss *bss;
55de908a 1059 struct ieee80211_chanctx *chanctx;
b4f286a1
JB		 1060 enum ieee80211_band new_band;
1061 int new_freq;
1062 u8 new_chan_no;
1063 u8 count;
1064 u8 mode;
cd64f2a9 1065 struct ieee80211_channel *new_chan;
85220d71 1066 struct cfg80211_chan_def new_chandef = {};
cd64f2a9
JB		 1067 struct cfg80211_chan_def new_vht_chandef = {};
1068 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1069 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
3670946f 1070 const struct ieee80211_ht_operation *ht_oper;
85220d71 1071 int secondary_channel_offset = -1;
cc32abd4 1072
77fdaa12
JB		 1073 ASSERT_MGD_MTX(ifmgd);
1074
37799e52 1075 if (!cbss)
cc32abd4
JB		 1076 return;
1077
b4f286a1 1078 if (local->scanning)
cc32abd4
JB		 1079 return;
1080
37799e52 1081 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1082 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1083 return;
1084
cd64f2a9
JB		 1085 sec_chan_offs = elems->sec_chan_offs;
1086 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
3670946f 1087 ht_oper = elems->ht_operation;
cd64f2a9
JB		 1088
1089 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1090 IEEE80211_STA_DISABLE_40MHZ)) {
1091 sec_chan_offs = NULL;
1092 wide_bw_chansw_ie = NULL;
3670946f
JB		 1093 /* only used for bandwidth here */
1094 ht_oper = NULL;
85220d71
JB		 1095 }
1096
cd64f2a9
JB		 1097 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1098 wide_bw_chansw_ie = NULL;
85220d71 1099
b4f286a1
JB		 1100 if (elems->ext_chansw_ie) {
1101 if (!ieee80211_operating_class_to_band(
1102 elems->ext_chansw_ie->new_operating_class,
1103 &new_band)) {
1104 sdata_info(sdata,
1105 "cannot understand ECSA IE operating class %d, disconnecting\n",
1106 elems->ext_chansw_ie->new_operating_class);
1107 ieee80211_queue_work(&local->hw,
1108 &ifmgd->csa_connection_drop_work);
1109 }
1110 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1111 count = elems->ext_chansw_ie->count;
1112 mode = elems->ext_chansw_ie->mode;
1113 } else if (elems->ch_switch_ie) {
1114 new_band = cbss->channel->band;
1115 new_chan_no = elems->ch_switch_ie->new_ch_num;
1116 count = elems->ch_switch_ie->count;
1117 mode = elems->ch_switch_ie->mode;
1118 } else {
1119 /* nothing here we understand */
37799e52 1120 return;
b4f286a1 1121 }
37799e52
JB		 1122
1123 bss = (void *)cbss->priv;
1124
b4f286a1 1125 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
cd64f2a9
JB		 1126 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1127 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
882a7c69
JB		 1128 sdata_info(sdata,
1129 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1130 ifmgd->associated->bssid, new_freq);
b4f286a1 1131 ieee80211_queue_work(&local->hw,
882a7c69 1132 &ifmgd->csa_connection_drop_work);
cc32abd4 1133 return;
882a7c69 1134 }
cc32abd4 1135
3670946f 1136 if (!beacon && sec_chan_offs) {
cd64f2a9 1137 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
3670946f
JB		 1138 } else if (beacon && ht_oper) {
1139 secondary_channel_offset =
1140 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
cd64f2a9 1141 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3670946f
JB		 1142 /*
1143 * If it's not a beacon, HT is enabled and the IE not present,
1144 * it's 20 MHz, 802.11-2012 8.5.2.6:
1145 * This element [the Secondary Channel Offset Element] is
1146 * present when switching to a 40 MHz channel. It may be
1147 * present when switching to a 20 MHz channel (in which
1148 * case the secondary channel offset is set to SCN).
1149 */
cd64f2a9
JB		 1150 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1151 }
1152
85220d71
JB		 1153 switch (secondary_channel_offset) {
1154 default:
1155 /* secondary_channel_offset was present but is invalid */
1156 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
cd64f2a9 1157 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1158 NL80211_CHAN_HT20);
1159 break;
1160 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
cd64f2a9 1161 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1162 NL80211_CHAN_HT40PLUS);
1163 break;
1164 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
cd64f2a9 1165 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1166 NL80211_CHAN_HT40MINUS);
1167 break;
1168 case -1:
cd64f2a9 1169 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1170 NL80211_CHAN_NO_HT);
1171 break;
1172 }
1173
cd64f2a9
JB		 1174 if (wide_bw_chansw_ie) {
1175 new_vht_chandef.chan = new_chan;
1176 new_vht_chandef.center_freq1 =
1177 ieee80211_channel_to_frequency(
1178 wide_bw_chansw_ie->new_center_freq_seg0,
1179 new_band);
1180
1181 switch (wide_bw_chansw_ie->new_channel_width) {
1182 default:
1183 /* hmmm, ignore VHT and use HT if present */
1184 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1185 new_vht_chandef.chan = NULL;
1186 break;
1187 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1188 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1189 break;
1190 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1191 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1192 break;
1193 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1194 /* field is otherwise reserved */
1195 new_vht_chandef.center_freq2 =
1196 ieee80211_channel_to_frequency(
1197 wide_bw_chansw_ie->new_center_freq_seg1,
1198 new_band);
1199 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1200 break;
1201 }
1202 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1203 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1204 chandef_downgrade(&new_vht_chandef);
1205 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1206 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1207 chandef_downgrade(&new_vht_chandef);
1208 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1209 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1210 chandef_downgrade(&new_vht_chandef);
1211 }
1212
1213 /* if VHT data is there validate & use it */
1214 if (new_vht_chandef.chan) {
1215 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1216 &new_chandef)) {
1217 sdata_info(sdata,
1218 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1219 ifmgd->associated->bssid);
1220 ieee80211_queue_work(&local->hw,
1221 &ifmgd->csa_connection_drop_work);
1222 return;
1223 }
1224 new_chandef = new_vht_chandef;
1225 }
1226
85220d71
JB		 1227 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1228 IEEE80211_CHAN_DISABLED)) {
1229 sdata_info(sdata,
1230 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1231 ifmgd->associated->bssid, new_freq,
1232 new_chandef.width, new_chandef.center_freq1,
1233 new_chandef.center_freq2);
1234 ieee80211_queue_work(&local->hw,
1235 &ifmgd->csa_connection_drop_work);
1236 return;
1237 }
1238
57eebdf3
JB		 1239 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1240
b4f286a1 1241 if (local->use_chanctx) {
55de908a
JB		 1242 sdata_info(sdata,
1243 "not handling channel switch with channel contexts\n");
b4f286a1 1244 ieee80211_queue_work(&local->hw,
55de908a 1245 &ifmgd->csa_connection_drop_work);
246dc3fd 1246 return;
55de908a
JB		 1247 }
1248
b4f286a1 1249 mutex_lock(&local->chanctx_mtx);
55de908a 1250 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
b4f286a1 1251 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1252 return;
1253 }
1254 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1255 struct ieee80211_chanctx, conf);
1256 if (chanctx->refcount > 1) {
1257 sdata_info(sdata,
1258 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1259 ieee80211_queue_work(&local->hw,
55de908a 1260 &ifmgd->csa_connection_drop_work);
b4f286a1 1261 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1262 return;
1263 }
b4f286a1 1264 mutex_unlock(&local->chanctx_mtx);
55de908a 1265
85220d71 1266 local->csa_chandef = new_chandef;
55de908a 1267
b4f286a1
JB		 1268 if (mode)
1269 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1270 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1271 IEEE80211_QUEUE_STOP_REASON_CSA);
1272
b4f286a1 1273 if (local->ops->channel_switch) {
5ce6e438 1274 /* use driver's channel switch callback */
57eebdf3
JB		 1275 struct ieee80211_channel_switch ch_switch = {
1276 .timestamp = timestamp,
b4f286a1 1277 .block_tx = mode,
85220d71 1278 .chandef = new_chandef,
b4f286a1 1279 .count = count,
57eebdf3
JB		 1280 };
1281
b4f286a1 1282 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1283 return;
1284 }
1285
1286 /* channel switch handled in software */
b4f286a1
JB		 1287 if (count <= 1)
1288 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1289 else
cc32abd4 1290 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1291 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1292}
1293
1ea6f9c0
JB		 1294static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1295 struct ieee80211_channel *channel,
1296 const u8 *country_ie, u8 country_ie_len,
1297 const u8 *pwr_constr_elem)
cc32abd4 1298{
04b7b2ff
JB		 1299 struct ieee80211_country_ie_triplet *triplet;
1300 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1301 int i, chan_pwr, chan_increment, new_ap_level;
1302 bool have_chan_pwr = false;
cc32abd4 1303
04b7b2ff
JB		 1304 /* Invalid IE */
1305 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1306 return 0;
cc32abd4 1307
04b7b2ff
JB		 1308 triplet = (void *)(country_ie + 3);
1309 country_ie_len -= 3;
1310
1311 switch (channel->band) {
1312 default:
1313 WARN_ON_ONCE(1);
1314 /* fall through */
1315 case IEEE80211_BAND_2GHZ:
1316 case IEEE80211_BAND_60GHZ:
1317 chan_increment = 1;
1318 break;
1319 case IEEE80211_BAND_5GHZ:
1320 chan_increment = 4;
1321 break;
cc32abd4 1322 }
04b7b2ff
JB		 1323
1324 /* find channel */
1325 while (country_ie_len >= 3) {
1326 u8 first_channel = triplet->chans.first_channel;
1327
1328 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1329 goto next;
1330
1331 for (i = 0; i < triplet->chans.num_channels; i++) {
1332 if (first_channel + i * chan_increment == chan) {
1333 have_chan_pwr = true;
1334 chan_pwr = triplet->chans.max_power;
1335 break;
1336 }
1337 }
1338 if (have_chan_pwr)
1339 break;
1340
1341 next:
1342 triplet++;
1343 country_ie_len -= 3;
1344 }
1345
1346 if (!have_chan_pwr)
1ea6f9c0 1347 return 0;
04b7b2ff
JB		 1348
1349 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1350
1ea6f9c0
JB		 1351 if (sdata->ap_power_level == new_ap_level)
1352 return 0;
04b7b2ff
JB		 1353
1354 sdata_info(sdata,
1355 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1356 new_ap_level, chan_pwr, *pwr_constr_elem,
1357 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1358 sdata->ap_power_level = new_ap_level;
1359 if (__ieee80211_recalc_txpower(sdata))
1360 return BSS_CHANGED_TXPOWER;
1361 return 0;
cc32abd4
JB		 1362}
1363
965bedad
JB		 1364/* powersave */
1365static void ieee80211_enable_ps(struct ieee80211_local *local,
1366 struct ieee80211_sub_if_data *sdata)
1367{
1368 struct ieee80211_conf *conf = &local->hw.conf;
1369
d5edaedc
JB		 1370 /*
1371 * If we are scanning right now then the parameters will
1372 * take effect when scan finishes.
1373 */
fbe9c429 1374 if (local->scanning)
d5edaedc
JB		 1375 return;
1376
965bedad
JB		 1377 if (conf->dynamic_ps_timeout > 0 &&
1378 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1379 mod_timer(&local->dynamic_ps_timer, jiffies +
1380 msecs_to_jiffies(conf->dynamic_ps_timeout));
1381 } else {
1382 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1383 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1384
2a13052f
JO		 1385 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1386 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1387 return;
1388
1389 conf->flags |= IEEE80211_CONF_PS;
1390 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1391 }
1392}
1393
1394static void ieee80211_change_ps(struct ieee80211_local *local)
1395{
1396 struct ieee80211_conf *conf = &local->hw.conf;
1397
1398 if (local->ps_sdata) {
965bedad
JB		 1399 ieee80211_enable_ps(local, local->ps_sdata);
1400 } else if (conf->flags & IEEE80211_CONF_PS) {
1401 conf->flags &= ~IEEE80211_CONF_PS;
1402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1403 del_timer_sync(&local->dynamic_ps_timer);
1404 cancel_work_sync(&local->dynamic_ps_enable_work);
1405 }
1406}
1407
808118cb
JY		 1408static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1409{
1410 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1411 struct sta_info *sta = NULL;
c2c98fde 1412 bool authorized = false;
808118cb
JY		 1413
1414 if (!mgd->powersave)
1415 return false;
1416
05cb9108
JB		 1417 if (mgd->broken_ap)
1418 return false;
1419
808118cb
JY		 1420 if (!mgd->associated)
1421 return false;
1422
808118cb
JY		 1423 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1424 IEEE80211_STA_CONNECTION_POLL))
1425 return false;
1426
1427 rcu_read_lock();
1428 sta = sta_info_get(sdata, mgd->bssid);
1429 if (sta)
c2c98fde 1430 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1431 rcu_read_unlock();
1432
c2c98fde 1433 return authorized;
808118cb
JY		 1434}
1435
965bedad 1436/* need to hold RTNL or interface lock */
10f644a4 1437void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1438{
1439 struct ieee80211_sub_if_data *sdata, *found = NULL;
1440 int count = 0;
195e294d 1441 int timeout;
965bedad
JB		 1442
1443 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1444 local->ps_sdata = NULL;
1445 return;
1446 }
1447
1448 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1449 if (!ieee80211_sdata_running(sdata))
965bedad 1450 continue;
8c7914de
RM		 1451 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1452 /* If an AP vif is found, then disable PS
1453 * by setting the count to zero thereby setting
1454 * ps_sdata to NULL.
1455 */
1456 count = 0;
1457 break;
1458 }
965bedad
JB		 1459 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1460 continue;
1461 found = sdata;
1462 count++;
1463 }
1464
808118cb 1465 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1466 s32 beaconint_us;
1467
1468 if (latency < 0)
ed77134b 1469 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1470
1471 beaconint_us = ieee80211_tu_to_usec(
1472 found->vif.bss_conf.beacon_int);
1473
ff616381 1474 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1475 if (timeout < 0) {
1476 /*
ff616381
JO		 1477 * Go to full PSM if the user configures a very low
1478 * latency requirement.
0ab82b04
EP		 1479 * The 2000 second value is there for compatibility
1480 * until the PM_QOS_NETWORK_LATENCY is configured
1481 * with real values.
195e294d 1482 */
0ab82b04
EP		 1483 if (latency > (1900 * USEC_PER_MSEC) &&
1484 latency != (2000 * USEC_PER_SEC))
195e294d 1485 timeout = 0;
ff616381
JO		 1486 else
1487 timeout = 100;
195e294d 1488 }
09b85568 1489 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1490
04fe2037 1491 if (beaconint_us > latency) {
10f644a4 1492 local->ps_sdata = NULL;
04fe2037 1493 } else {
04fe2037 1494 int maxslp = 1;
826262c3 1495 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1496
1497 /* If the TIM IE is invalid, pretend the value is 1 */
1498 if (!dtimper)
1499 dtimper = 1;
1500 else if (dtimper > 1)
04fe2037
JB		 1501 maxslp = min_t(int, dtimper,
1502 latency / beaconint_us);
1503
9ccebe61 1504 local->hw.conf.max_sleep_period = maxslp;
56007a02 1505 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1506 local->ps_sdata = found;
04fe2037 1507 }
10f644a4 1508 } else {
965bedad 1509 local->ps_sdata = NULL;
10f644a4 1510 }
965bedad
JB		 1511
1512 ieee80211_change_ps(local);
1513}
1514
ab095877
EP		 1515void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1516{
1517 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1518
1519 if (sdata->vif.bss_conf.ps != ps_allowed) {
1520 sdata->vif.bss_conf.ps = ps_allowed;
1521 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1522 }
1523}
1524
965bedad
JB		 1525void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1526{
1527 struct ieee80211_local *local =
1528 container_of(work, struct ieee80211_local,
1529 dynamic_ps_disable_work);
1530
1531 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1532 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1533 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1534 }
1535
1536 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1537 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1538 IEEE80211_QUEUE_STOP_REASON_PS);
1539}
1540
1541void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1542{
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_enable_work);
1546 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1547 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1548 unsigned long flags;
1549 int q;
965bedad
JB		 1550
1551 /* can only happen when PS was just disabled anyway */
1552 if (!sdata)
1553 return;
1554
5e34069c
CL		 1555 ifmgd = &sdata->u.mgd;
1556
965bedad
JB		 1557 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1558 return;
1559
09b85568 1560 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1561 /* don't enter PS if TX frames are pending */
1562 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1563 mod_timer(&local->dynamic_ps_timer, jiffies +
1564 msecs_to_jiffies(
1565 local->hw.conf.dynamic_ps_timeout));
1566 return;
1567 }
77b7023a
AN		 1568
1569 /*
1570 * transmission can be stopped by others which leads to
1571 * dynamic_ps_timer expiry. Postpone the ps timer if it
1572 * is not the actual idle state.
1573 */
1574 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1575 for (q = 0; q < local->hw.queues; q++) {
1576 if (local->queue_stop_reasons[q]) {
1577 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1578 flags);
1579 mod_timer(&local->dynamic_ps_timer, jiffies +
1580 msecs_to_jiffies(
1581 local->hw.conf.dynamic_ps_timeout));
1582 return;
1583 }
1584 }
1585 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1586 }
1ddc2867 1587
375177bf 1588 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1589 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1590 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1591 mod_timer(&local->dynamic_ps_timer, jiffies +
1592 msecs_to_jiffies(
1593 local->hw.conf.dynamic_ps_timeout));
a1598383 1594 } else {
e8306f98
VN		 1595 ieee80211_send_nullfunc(local, sdata, 1);
1596 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1597 ieee80211_flush_queues(local, sdata);
e8306f98 1598 }
f3e85b9e
VN		 1599 }
1600
2a13052f
JO		 1601 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1602 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1603 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1604 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1605 local->hw.conf.flags |= IEEE80211_CONF_PS;
1606 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1607 }
965bedad
JB		 1608}
1609
1610void ieee80211_dynamic_ps_timer(unsigned long data)
1611{
1612 struct ieee80211_local *local = (void *) data;
1613
78f1a8b7 1614 if (local->quiescing || local->suspended)
5bb644a0
JB		 1615 return;
1616
42935eca 1617 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1618}
1619
164eb02d
SW		 1620void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1621{
1622 struct delayed_work *delayed_work =
1623 container_of(work, struct delayed_work, work);
1624 struct ieee80211_sub_if_data *sdata =
1625 container_of(delayed_work, struct ieee80211_sub_if_data,
1626 dfs_cac_timer_work);
1627
1628 ieee80211_vif_release_channel(sdata);
1629
1630 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1631}
1632
60f8b39c 1633/* MLME */
7d25745d 1634static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1635 struct ieee80211_sub_if_data *sdata,
4a3cb702 1636 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1637{
f0706e82 1638 struct ieee80211_tx_queue_params params;
4ced3f74 1639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1640 size_t left;
1641 int count;
4a3cb702
JB		 1642 const u8 *pos;
1643 u8 uapsd_queues = 0;
f0706e82 1644
e1b3ec1a 1645 if (!local->ops->conf_tx)
7d25745d 1646 return false;
e1b3ec1a 1647
32c5057b 1648 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1649 return false;
3434fbd3
JB		 1650
1651 if (!wmm_param)
7d25745d 1652 return false;
3434fbd3 1653
f0706e82 1654 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1655 return false;
ab13315a
KV		 1656
1657 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1658 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1659
f0706e82 1660 count = wmm_param[6] & 0x0f;
46900298 1661 if (count == ifmgd->wmm_last_param_set)
7d25745d 1662 return false;
46900298 1663 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1664
1665 pos = wmm_param + 8;
1666 left = wmm_param_len - 8;
1667
1668 memset(&params, 0, sizeof(params));
1669
00e96dec 1670 sdata->wmm_acm = 0;
f0706e82
JB		 1671 for (; left >= 4; left -= 4, pos += 4) {
1672 int aci = (pos[0] >> 5) & 0x03;
1673 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1674 bool uapsd = false;
f0706e82
JB		 1675 int queue;
1676
1677 switch (aci) {
0eeb59fe 1678 case 1: /* AC_BK */
e100bb64 1679 queue = 3;
988c0f72 1680 if (acm)
00e96dec 1681 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1682 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1683 uapsd = true;
f0706e82 1684 break;
0eeb59fe 1685 case 2: /* AC_VI */
e100bb64 1686 queue = 1;
988c0f72 1687 if (acm)
00e96dec 1688 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1689 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1690 uapsd = true;
f0706e82 1691 break;
0eeb59fe 1692 case 3: /* AC_VO */
e100bb64 1693 queue = 0;
988c0f72 1694 if (acm)
00e96dec 1695 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1696 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1697 uapsd = true;
f0706e82 1698 break;
0eeb59fe 1699 case 0: /* AC_BE */
f0706e82 1700 default:
e100bb64 1701 queue = 2;
988c0f72 1702 if (acm)
00e96dec 1703 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1704 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1705 uapsd = true;
f0706e82
JB		 1706 break;
1707 }
1708
1709 params.aifs = pos[0] & 0x0f;
1710 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1711 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1712 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1713 params.acm = acm;
ab13315a
KV		 1714 params.uapsd = uapsd;
1715
bdcbd8e0
JB		 1716 mlme_dbg(sdata,
1717 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1718 queue, aci, acm,
1719 params.aifs, params.cw_min, params.cw_max,
1720 params.txop, params.uapsd);
f6f3def3
EP		 1721 sdata->tx_conf[queue] = params;
1722 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1723 sdata_err(sdata,
1724 "failed to set TX queue parameters for queue %d\n",
1725 queue);
f0706e82 1726 }
e1b3ec1a
SG		 1727
1728 /* enable WMM or activate new settings */
4ced3f74 1729 sdata->vif.bss_conf.qos = true;
7d25745d 1730 return true;
f0706e82
JB		 1731}
1732
925e64c3
SG		 1733static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1734{
1735 lockdep_assert_held(&sdata->local->mtx);
1736
1737 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1738 IEEE80211_STA_BEACON_POLL);
1739 ieee80211_run_deferred_scan(sdata->local);
1740}
1741
1742static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1743{
1744 mutex_lock(&sdata->local->mtx);
1745 __ieee80211_stop_poll(sdata);
1746 mutex_unlock(&sdata->local->mtx);
1747}
1748
7a5158ef
JB		 1749static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1750 u16 capab, bool erp_valid, u8 erp)
5628221c 1751{
bda3933a 1752 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1753 u32 changed = 0;
7a5158ef
JB		 1754 bool use_protection;
1755 bool use_short_preamble;
1756 bool use_short_slot;
1757
1758 if (erp_valid) {
1759 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1760 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1761 } else {
1762 use_protection = false;
1763 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1764 }
1765
1766 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1767 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1768 use_short_slot = true;
5628221c 1769
471b3efd 1770 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1771 bss_conf->use_cts_prot = use_protection;
1772 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1773 }
7e9ed188 1774
d43c7b37 1775 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1776 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1777 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1778 }
d9430a32 1779
7a5158ef 1780 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1781 bss_conf->use_short_slot = use_short_slot;
1782 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1783 }
1784
1785 return changed;
1786}
1787
f698d856 1788static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1789 struct cfg80211_bss *cbss,
ae5eb026 1790 u32 bss_info_changed)
f0706e82 1791{
0c1ad2ca 1792 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1793 struct ieee80211_local *local = sdata->local;
68542962 1794 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1795
ae5eb026 1796 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1797 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1798 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1799
7ccc8bd7 1800 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1801 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1802
0c1ad2ca
JB		 1803 sdata->u.mgd.associated = cbss;
1804 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1805
17e4ec14
JM		 1806 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1807
488dd7b5 1808 if (sdata->vif.p2p) {
9caf0364 1809 const struct cfg80211_bss_ies *ies;
488dd7b5 1810
9caf0364
JB		 1811 rcu_read_lock();
1812 ies = rcu_dereference(cbss->ies);
1813 if (ies) {
9caf0364
JB		 1814 int ret;
1815
1816 ret = cfg80211_get_p2p_attr(
1817 ies->data, ies->len,
1818 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1819 (u8 *) &bss_conf->p2p_noa_attr,
1820 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1821 if (ret >= 2) {
67baf663
JD		 1822 sdata->u.mgd.p2p_noa_index =
1823 bss_conf->p2p_noa_attr.index;
9caf0364 1824 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1825 }
488dd7b5 1826 }
9caf0364 1827 rcu_read_unlock();
488dd7b5
JB		 1828 }
1829
b291ba11 1830 /* just to be sure */
925e64c3 1831 ieee80211_stop_poll(sdata);
b291ba11 1832
9ac19a90 1833 ieee80211_led_assoc(local, 1);
9306102e 1834
c65dd147 1835 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1836 /*
1837 * If the AP is buggy we may get here with no DTIM period
1838 * known, so assume it's 1 which is the only safe assumption
1839 * in that case, although if the TIM IE is broken powersave
1840 * probably just won't work at all.
1841 */
1842 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1843 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1844 } else {
e5b900d2 1845 bss_conf->dtim_period = 0;
826262c3 1846 }
e5b900d2 1847
68542962 1848 bss_conf->assoc = 1;
9cef8737 1849
a97c13c3 1850 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1851 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1852 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1853 bss_info_changed |= BSS_CHANGED_CQM;
1854
68542962 1855 /* Enable ARP filtering */
0f19b41e 1856 if (bss_conf->arp_addr_cnt)
68542962 1857 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1858
ae5eb026 1859 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1860
056508dc
JB		 1861 mutex_lock(&local->iflist_mtx);
1862 ieee80211_recalc_ps(local, -1);
1863 mutex_unlock(&local->iflist_mtx);
e0cb686f 1864
04ecd257 1865 ieee80211_recalc_smps(sdata);
ab095877
EP		 1866 ieee80211_recalc_ps_vif(sdata);
1867
9ac19a90 1868 netif_carrier_on(sdata->dev);
f0706e82
JB		 1869}
1870
e69e95db 1871static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1872 u16 stype, u16 reason, bool tx,
1873 u8 *frame_buf)
aa458d17 1874{
46900298 1875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1876 struct ieee80211_local *local = sdata->local;
3cc5240b 1877 u32 changed = 0;
aa458d17 1878
77fdaa12
JB		 1879 ASSERT_MGD_MTX(ifmgd);
1880
37ad3888
JB		 1881 if (WARN_ON_ONCE(tx && !frame_buf))
1882 return;
1883
b291ba11
JB		 1884 if (WARN_ON(!ifmgd->associated))
1885 return;
1886
79543d8e
DS		 1887 ieee80211_stop_poll(sdata);
1888
77fdaa12 1889 ifmgd->associated = NULL;
aa458d17
TW		 1890 netif_carrier_off(sdata->dev);
1891
88bc40e8
EP		 1892 /*
1893 * if we want to get out of ps before disassoc (why?) we have
1894 * to do it before sending disassoc, as otherwise the null-packet
1895 * won't be valid.
1896 */
1897 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1898 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1899 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1900 }
1901 local->ps_sdata = NULL;
1902
ab095877
EP		 1903 /* disable per-vif ps */
1904 ieee80211_recalc_ps_vif(sdata);
1905
f823981e
EP		 1906 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1907 if (tx)
39ecc01d 1908 ieee80211_flush_queues(local, sdata);
f823981e 1909
37ad3888
JB		 1910 /* deauthenticate/disassociate now */
1911 if (tx || frame_buf)
88a9e31c
EP		 1912 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1913 reason, tx, frame_buf);
37ad3888
JB		 1914
1915 /* flush out frame */
1916 if (tx)
39ecc01d 1917 ieee80211_flush_queues(local, sdata);
37ad3888 1918
88a9e31c
EP		 1919 /* clear bssid only after building the needed mgmt frames */
1920 memset(ifmgd->bssid, 0, ETH_ALEN);
1921
37ad3888 1922 /* remove AP and TDLS peers */
051007d9 1923 sta_info_flush_defer(sdata);
37ad3888
JB		 1924
1925 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1926 changed |= ieee80211_reset_erp_info(sdata);
1927
f5e5bf25 1928 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1929 changed |= BSS_CHANGED_ASSOC;
1930 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1931
67baf663
JD		 1932 ifmgd->p2p_noa_index = -1;
1933 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1934 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1935
dd5ecfea 1936 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1937 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1938 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1939 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1940 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1941
1ea6f9c0 1942 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1943
520eb820
KV		 1944 del_timer_sync(&local->dynamic_ps_timer);
1945 cancel_work_sync(&local->dynamic_ps_enable_work);
1946
68542962 1947 /* Disable ARP filtering */
0f19b41e 1948 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1949 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1950
3abead59
JB		 1951 sdata->vif.bss_conf.qos = false;
1952 changed |= BSS_CHANGED_QOS;
1953
0aaffa9b
JB		 1954 /* The BSSID (not really interesting) and HT changed */
1955 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1956 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1957
3abead59
JB		 1958 /* disassociated - set to defaults now */
1959 ieee80211_set_wmm_default(sdata, false);
1960
b9dcf712
JB		 1961 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1962 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1963 del_timer_sync(&sdata->u.mgd.timer);
1964 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1965
826262c3
JB		 1966 sdata->vif.bss_conf.dtim_period = 0;
1967
028e8da0
JB		 1968 ifmgd->flags = 0;
1969 ieee80211_vif_release_channel(sdata);
aa458d17 1970}
f0706e82 1971
3cf335d5
KV		 1972void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1973 struct ieee80211_hdr *hdr)
1974{
1975 /*
1976 * We can postpone the mgd.timer whenever receiving unicast frames
1977 * from AP because we know that the connection is working both ways
1978 * at that time. But multicast frames (and hence also beacons) must
1979 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1980 * data idle periods for sending the periodic probe request to the
1981 * AP we're connected to.
3cf335d5 1982 */
b291ba11
JB		 1983 if (is_multicast_ether_addr(hdr->addr1))
1984 return;
1985
be099e82 1986 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1987}
f0706e82 1988
4e5ff376
FF		 1989static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1990{
1991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1992 struct ieee80211_local *local = sdata->local;
4e5ff376 1993
133d40f9 1994 mutex_lock(&local->mtx);
4e5ff376 1995 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1996 IEEE80211_STA_CONNECTION_POLL))) {
1997 mutex_unlock(&local->mtx);
1998 return;
1999 }
4e5ff376 2000
925e64c3 2001 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2002
2003 mutex_lock(&local->iflist_mtx);
2004 ieee80211_recalc_ps(local, -1);
2005 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2006
2007 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2008 goto out;
4e5ff376
FF		 2009
2010 /*
2011 * We've received a probe response, but are not sure whether
2012 * we have or will be receiving any beacons or data, so let's
2013 * schedule the timers again, just in case.
2014 */
2015 ieee80211_sta_reset_beacon_monitor(sdata);
2016
2017 mod_timer(&ifmgd->conn_mon_timer,
2018 round_jiffies_up(jiffies +
2019 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2020out:
133d40f9 2021 mutex_unlock(&local->mtx);
4e5ff376
FF		 2022}
2023
2024void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 2025 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 2026{
75706d0e 2027 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2028 return;
2029
4e5ff376
FF		 2030 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2031 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2032 if (ack)
cab1c7fd 2033 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2034 else
2035 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2036 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2037 return;
4e5ff376 2038 }
cab1c7fd
WD		 2039
2040 if (ack)
2041 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2042}
2043
a43abf29
ML		 2044static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2045{
2046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2047 const u8 *ssid;
f01a067d 2048 u8 *dst = ifmgd->associated->bssid;
180205bd 2049 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2050
2051 /*
2052 * Try sending broadcast probe requests for the last three
2053 * probe requests after the first ones failed since some
2054 * buggy APs only support broadcast probe requests.
2055 */
2056 if (ifmgd->probe_send_count >= unicast_limit)
2057 dst = NULL;
a43abf29 2058
4e5ff376
FF		 2059 /*
2060 * When the hardware reports an accurate Tx ACK status, it's
2061 * better to send a nullfunc frame instead of a probe request,
2062 * as it will kick us off the AP quickly if we aren't associated
2063 * anymore. The timeout will be reset if the frame is ACKed by
2064 * the AP.
2065 */
992e68bf
SD		 2066 ifmgd->probe_send_count++;
2067
04ac3c0e
FF		 2068 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2069 ifmgd->nullfunc_failed = false;
4e5ff376 2070 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2071 } else {
88c868c4
SG		 2072 int ssid_len;
2073
9caf0364 2074 rcu_read_lock();
4e5ff376 2075 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2076 if (WARN_ON_ONCE(ssid == NULL))
2077 ssid_len = 0;
2078 else
2079 ssid_len = ssid[1];
2080
2081 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2082 0, (u32) -1, true, 0,
55de908a 2083 ifmgd->associated->channel, false);
9caf0364 2084 rcu_read_unlock();
4e5ff376 2085 }
a43abf29 2086
180205bd 2087 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 2088 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 2089 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2090 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2091}
2092
b291ba11
JB		 2093static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2094 bool beacon)
04de8381 2095{
04de8381 2096 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2097 bool already = false;
34bfc411 2098
9607e6b6 2099 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2100 return;
2101
77fdaa12
JB		 2102 mutex_lock(&ifmgd->mtx);
2103
2104 if (!ifmgd->associated)
2105 goto out;
2106
133d40f9
SG		 2107 mutex_lock(&sdata->local->mtx);
2108
2109 if (sdata->local->tmp_channel || sdata->local->scanning) {
2110 mutex_unlock(&sdata->local->mtx);
2111 goto out;
2112 }
2113
a13fbe54 2114 if (beacon) {
bdcbd8e0 2115 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2116 "detected beacon loss from AP (missed %d beacons) - probing\n",
2117 beacon_loss_count);
bdcbd8e0 2118
a13fbe54
BG		 2119 ieee80211_cqm_rssi_notify(&sdata->vif,
2120 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2121 GFP_KERNEL);
2122 }
04de8381 2123
b291ba11
JB		 2124 /*
2125 * The driver/our work has already reported this event or the
2126 * connection monitoring has kicked in and we have already sent
2127 * a probe request. Or maybe the AP died and the driver keeps
2128 * reporting until we disassociate...
2129 *
2130 * In either case we have to ignore the current call to this
2131 * function (except for setting the correct probe reason bit)
2132 * because otherwise we would reset the timer every time and
2133 * never check whether we received a probe response!
2134 */
2135 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2136 IEEE80211_STA_CONNECTION_POLL))
2137 already = true;
2138
2139 if (beacon)
2140 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2141 else
2142 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2143
133d40f9
SG		 2144 mutex_unlock(&sdata->local->mtx);
2145
b291ba11
JB		 2146 if (already)
2147 goto out;
2148
4e751843
JB		 2149 mutex_lock(&sdata->local->iflist_mtx);
2150 ieee80211_recalc_ps(sdata->local, -1);
2151 mutex_unlock(&sdata->local->iflist_mtx);
2152
a43abf29
ML		 2153 ifmgd->probe_send_count = 0;
2154 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2155 out:
2156 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2157}
2158
a619a4c0
JO		 2159struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2160 struct ieee80211_vif *vif)
2161{
2162 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2164 struct cfg80211_bss *cbss;
a619a4c0
JO		 2165 struct sk_buff *skb;
2166 const u8 *ssid;
88c868c4 2167 int ssid_len;
a619a4c0
JO		 2168
2169 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2170 return NULL;
2171
2172 ASSERT_MGD_MTX(ifmgd);
2173
d9b3b28b
EP		 2174 if (ifmgd->associated)
2175 cbss = ifmgd->associated;
2176 else if (ifmgd->auth_data)
2177 cbss = ifmgd->auth_data->bss;
2178 else if (ifmgd->assoc_data)
2179 cbss = ifmgd->assoc_data->bss;
2180 else
a619a4c0
JO		 2181 return NULL;
2182
9caf0364 2183 rcu_read_lock();
d9b3b28b 2184 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2185 if (WARN_ON_ONCE(ssid == NULL))
2186 ssid_len = 0;
2187 else
2188 ssid_len = ssid[1];
2189
d9b3b28b 2190 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2191 (u32) -1, cbss->channel,
6b77863b 2192 ssid + 2, ssid_len,
85a237fe 2193 NULL, 0, true);
9caf0364 2194 rcu_read_unlock();
a619a4c0
JO		 2195
2196 return skb;
2197}
2198EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2199
eef9e54c 2200static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2201{
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2203 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2204
2205 mutex_lock(&ifmgd->mtx);
2206 if (!ifmgd->associated) {
2207 mutex_unlock(&ifmgd->mtx);
2208 return;
2209 }
2210
37ad3888
JB		 2211 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2212 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2213 true, frame_buf);
882a7c69 2214 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2215 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2216 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2217 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2218 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2219
1e4dcd01
JO		 2220 /*
2221 * must be outside lock due to cfg80211,
2222 * but that's not a problem.
2223 */
6ae16775 2224 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2225}
2226
cc74c0c7 2227static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2228{
2229 struct ieee80211_sub_if_data *sdata =
2230 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2231 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233 struct sta_info *sta;
2234
2235 if (ifmgd->associated) {
30fa9047 2236 rcu_read_lock();
a85e1d55
PS		 2237 sta = sta_info_get(sdata, ifmgd->bssid);
2238 if (sta)
2239 sta->beacon_loss_count++;
30fa9047 2240 rcu_read_unlock();
a85e1d55 2241 }
b291ba11 2242
682bd38b 2243 if (ifmgd->connection_loss) {
882a7c69
JB		 2244 sdata_info(sdata, "Connection to AP %pM lost\n",
2245 ifmgd->bssid);
eef9e54c 2246 __ieee80211_disconnect(sdata);
882a7c69 2247 } else {
1e4dcd01 2248 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2249 }
2250}
2251
2252static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2253{
2254 struct ieee80211_sub_if_data *sdata =
2255 container_of(work, struct ieee80211_sub_if_data,
2256 u.mgd.csa_connection_drop_work);
2257
eef9e54c 2258 __ieee80211_disconnect(sdata);
b291ba11
JB		 2259}
2260
04de8381
KV		 2261void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2262{
2263 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2264 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2265
b5878a2d
JB		 2266 trace_api_beacon_loss(sdata);
2267
682bd38b 2268 sdata->u.mgd.connection_loss = false;
1e4dcd01 2269 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2270}
2271EXPORT_SYMBOL(ieee80211_beacon_loss);
2272
1e4dcd01
JO		 2273void ieee80211_connection_loss(struct ieee80211_vif *vif)
2274{
2275 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2276 struct ieee80211_hw *hw = &sdata->local->hw;
2277
b5878a2d
JB		 2278 trace_api_connection_loss(sdata);
2279
682bd38b 2280 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2281 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2282}
2283EXPORT_SYMBOL(ieee80211_connection_loss);
2284
2285
66e67e41
JB		 2286static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2287 bool assoc)
2288{
2289 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2290
2291 lockdep_assert_held(&sdata->u.mgd.mtx);
2292
66e67e41
JB		 2293 if (!assoc) {
2294 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2295
2296 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2297 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2298 sdata->u.mgd.flags = 0;
55de908a 2299 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2300 }
2301
5b112d3d 2302 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2303 kfree(auth_data);
2304 sdata->u.mgd.auth_data = NULL;
2305}
2306
2307static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2308 struct ieee80211_mgmt *mgmt, size_t len)
2309{
1672c0e3 2310 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2311 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2312 u8 *pos;
2313 struct ieee802_11_elems elems;
1672c0e3 2314 u32 tx_flags = 0;
66e67e41
JB		 2315
2316 pos = mgmt->u.auth.variable;
b2e506bf 2317 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2318 if (!elems.challenge)
2319 return;
2320 auth_data->expected_transaction = 4;
a1845fc7 2321 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2322 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2323 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2324 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2325 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2326 elems.challenge - 2, elems.challenge_len + 2,
2327 auth_data->bss->bssid, auth_data->bss->bssid,
2328 auth_data->key, auth_data->key_len,
1672c0e3 2329 auth_data->key_idx, tx_flags);
66e67e41
JB		 2330}
2331
2332static enum rx_mgmt_action __must_check
2333ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2334 struct ieee80211_mgmt *mgmt, size_t len)
2335{
2336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2337 u8 bssid[ETH_ALEN];
2338 u16 auth_alg, auth_transaction, status_code;
2339 struct sta_info *sta;
2340
2341 lockdep_assert_held(&ifmgd->mtx);
2342
2343 if (len < 24 + 6)
2344 return RX_MGMT_NONE;
2345
2346 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2347 return RX_MGMT_NONE;
2348
2349 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2350
b203ca39 2351 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2352 return RX_MGMT_NONE;
2353
2354 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2355 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2356 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2357
2358 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2359 auth_transaction != ifmgd->auth_data->expected_transaction) {
2360 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2361 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2362 auth_transaction,
2363 ifmgd->auth_data->expected_transaction);
66e67e41 2364 return RX_MGMT_NONE;
0f4126e8 2365 }
66e67e41
JB		 2366
2367 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2368 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2369 mgmt->sa, status_code);
dac211ec
EP		 2370 ieee80211_destroy_auth_data(sdata, false);
2371 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2372 }
2373
2374 switch (ifmgd->auth_data->algorithm) {
2375 case WLAN_AUTH_OPEN:
2376 case WLAN_AUTH_LEAP:
2377 case WLAN_AUTH_FT:
6b8ece3a 2378 case WLAN_AUTH_SAE:
66e67e41
JB		 2379 break;
2380 case WLAN_AUTH_SHARED_KEY:
2381 if (ifmgd->auth_data->expected_transaction != 4) {
2382 ieee80211_auth_challenge(sdata, mgmt, len);
2383 /* need another frame */
2384 return RX_MGMT_NONE;
2385 }
2386 break;
2387 default:
2388 WARN_ONCE(1, "invalid auth alg %d",
2389 ifmgd->auth_data->algorithm);
2390 return RX_MGMT_NONE;
2391 }
2392
bdcbd8e0 2393 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2394 ifmgd->auth_data->done = true;
2395 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2396 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2397 run_again(ifmgd, ifmgd->auth_data->timeout);
2398
6b8ece3a
JM		 2399 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2400 ifmgd->auth_data->expected_transaction != 2) {
2401 /*
2402 * Report auth frame to user space for processing since another
2403 * round of Authentication frames is still needed.
2404 */
2405 return RX_MGMT_CFG80211_RX_AUTH;
2406 }
2407
66e67e41
JB		 2408 /* move station state to auth */
2409 mutex_lock(&sdata->local->sta_mtx);
2410 sta = sta_info_get(sdata, bssid);
2411 if (!sta) {
2412 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2413 goto out_err;
2414 }
2415 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2416 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2417 goto out_err;
2418 }
2419 mutex_unlock(&sdata->local->sta_mtx);
2420
2421 return RX_MGMT_CFG80211_RX_AUTH;
2422 out_err:
2423 mutex_unlock(&sdata->local->sta_mtx);
2424 /* ignore frame -- wait for timeout */
2425 return RX_MGMT_NONE;
2426}
2427
2428
77fdaa12
JB		 2429static enum rx_mgmt_action __must_check
2430ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2431 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2432{
46900298 2433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2434 const u8 *bssid = NULL;
f0706e82
JB		 2435 u16 reason_code;
2436
66e67e41
JB		 2437 lockdep_assert_held(&ifmgd->mtx);
2438
f4ea83dd 2439 if (len < 24 + 2)
77fdaa12 2440 return RX_MGMT_NONE;
f0706e82 2441
66e67e41 2442 if (!ifmgd->associated ||
b203ca39 2443 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2444 return RX_MGMT_NONE;
77fdaa12 2445
0c1ad2ca 2446 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2447
2448 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2449
bdcbd8e0
JB		 2450 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2451 bssid, reason_code);
77fdaa12 2452
37ad3888
JB		 2453 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2454
77fdaa12 2455 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2456}
2457
2458
77fdaa12
JB		 2459static enum rx_mgmt_action __must_check
2460ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2461 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2462{
46900298 2463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2464 u16 reason_code;
2465
66e67e41 2466 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2467
66e67e41 2468 if (len < 24 + 2)
77fdaa12
JB		 2469 return RX_MGMT_NONE;
2470
66e67e41 2471 if (!ifmgd->associated ||
b203ca39 2472 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2473 return RX_MGMT_NONE;
f0706e82
JB		 2474
2475 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2476
bdcbd8e0
JB		 2477 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2478 mgmt->sa, reason_code);
f0706e82 2479
37ad3888
JB		 2480 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2481
77fdaa12 2482 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2483}
2484
c74d084f
CL		 2485static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2486 u8 *supp_rates, unsigned int supp_rates_len,
2487 u32 *rates, u32 *basic_rates,
2488 bool *have_higher_than_11mbit,
2489 int *min_rate, int *min_rate_index)
2490{
2491 int i, j;
2492
2493 for (i = 0; i < supp_rates_len; i++) {
2494 int rate = (supp_rates[i] & 0x7f) * 5;
2495 bool is_basic = !!(supp_rates[i] & 0x80);
2496
2497 if (rate > 110)
2498 *have_higher_than_11mbit = true;
2499
2500 /*
2501 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2502 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2503 *
2504 * Note: Even through the membership selector and the basic
2505 * rate flag share the same bit, they are not exactly
2506 * the same.
2507 */
2508 if (!!(supp_rates[i] & 0x80) &&
2509 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2510 continue;
2511
2512 for (j = 0; j < sband->n_bitrates; j++) {
2513 if (sband->bitrates[j].bitrate == rate) {
2514 *rates |= BIT(j);
2515 if (is_basic)
2516 *basic_rates |= BIT(j);
2517 if (rate < *min_rate) {
2518 *min_rate = rate;
2519 *min_rate_index = j;
2520 }
2521 break;
2522 }
2523 }
2524 }
2525}
f0706e82 2526
66e67e41
JB		 2527static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2528 bool assoc)
2529{
2530 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2531
2532 lockdep_assert_held(&sdata->u.mgd.mtx);
2533
66e67e41
JB		 2534 if (!assoc) {
2535 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2536
2537 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2538 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2539 sdata->u.mgd.flags = 0;
55de908a 2540 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2541 }
2542
2543 kfree(assoc_data);
2544 sdata->u.mgd.assoc_data = NULL;
2545}
2546
2547static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2548 struct cfg80211_bss *cbss,
af6b6374 2549 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2550{
46900298 2551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2552 struct ieee80211_local *local = sdata->local;
8318d78a 2553 struct ieee80211_supported_band *sband;
f0706e82 2554 struct sta_info *sta;
af6b6374 2555 u8 *pos;
af6b6374 2556 u16 capab_info, aid;
f0706e82 2557 struct ieee802_11_elems elems;
bda3933a 2558 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2559 const struct cfg80211_bss_ies *bss_ies = NULL;
2560 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2561 u32 changed = 0;
c74d084f 2562 int err;
35d865af 2563 bool ret;
f0706e82 2564
af6b6374 2565 /* AssocResp and ReassocResp have identical structure */
f0706e82 2566
f0706e82 2567 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2568 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2569
1dd84aa2 2570 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2571 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2572 aid);
1dd84aa2
JB		 2573 aid &= ~(BIT(15) | BIT(14));
2574
05cb9108
JB		 2575 ifmgd->broken_ap = false;
2576
2577 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2578 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2579 aid);
05cb9108
JB		 2580 aid = 0;
2581 ifmgd->broken_ap = true;
2582 }
2583
af6b6374 2584 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2585 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2586
f0706e82 2587 if (!elems.supp_rates) {
bdcbd8e0 2588 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2589 return false;
f0706e82
JB		 2590 }
2591
46900298 2592 ifmgd->aid = aid;
f0706e82 2593
35d865af
JB		 2594 /*
2595 * Some APs are erroneously not including some information in their
2596 * (re)association response frames. Try to recover by using the data
2597 * from the beacon or probe response. This seems to afflict mobile
2598 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2599 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2600 */
2601 if ((assoc_data->wmm && !elems.wmm_param) ||
2602 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2603 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2604 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2605 (!elems.vht_cap_elem || !elems.vht_operation))) {
2606 const struct cfg80211_bss_ies *ies;
2607 struct ieee802_11_elems bss_elems;
2608
2609 rcu_read_lock();
2610 ies = rcu_dereference(cbss->ies);
2611 if (ies)
2612 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2613 GFP_ATOMIC);
2614 rcu_read_unlock();
2615 if (!bss_ies)
2616 return false;
2617
2618 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2619 false, &bss_elems);
2620 if (assoc_data->wmm &&
2621 !elems.wmm_param && bss_elems.wmm_param) {
2622 elems.wmm_param = bss_elems.wmm_param;
2623 sdata_info(sdata,
2624 "AP bug: WMM param missing from AssocResp\n");
2625 }
2626
2627 /*
2628 * Also check if we requested HT/VHT, otherwise the AP doesn't
2629 * have to include the IEs in the (re)association response.
2630 */
2631 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2632 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2633 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2634 sdata_info(sdata,
2635 "AP bug: HT capability missing from AssocResp\n");
2636 }
2637 if (!elems.ht_operation && bss_elems.ht_operation &&
2638 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2639 elems.ht_operation = bss_elems.ht_operation;
2640 sdata_info(sdata,
2641 "AP bug: HT operation missing from AssocResp\n");
2642 }
2643 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2644 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2645 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2646 sdata_info(sdata,
2647 "AP bug: VHT capa missing from AssocResp\n");
2648 }
2649 if (!elems.vht_operation && bss_elems.vht_operation &&
2650 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2651 elems.vht_operation = bss_elems.vht_operation;
2652 sdata_info(sdata,
2653 "AP bug: VHT operation missing from AssocResp\n");
2654 }
2655 }
2656
30eb1dc2
JB		 2657 /*
2658 * We previously checked these in the beacon/probe response, so
2659 * they should be present here. This is just a safety net.
2660 */
2661 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2662 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2663 sdata_info(sdata,
35d865af
JB		 2664 "HT AP is missing WMM params or HT capability/operation\n");
2665 ret = false;
2666 goto out;
30eb1dc2
JB		 2667 }
2668
2669 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2670 (!elems.vht_cap_elem || !elems.vht_operation)) {
2671 sdata_info(sdata,
35d865af
JB		 2672 "VHT AP is missing VHT capability/operation\n");
2673 ret = false;
2674 goto out;
30eb1dc2
JB		 2675 }
2676
2a33bee2
GE		 2677 mutex_lock(&sdata->local->sta_mtx);
2678 /*
2679 * station info was already allocated and inserted before
2680 * the association and should be available to us
2681 */
7852e361 2682 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2683 if (WARN_ON(!sta)) {
2684 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2685 ret = false;
2686 goto out;
77fdaa12 2687 }
05e5e883 2688
55de908a 2689 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2690
30eb1dc2 2691 /* Set up internal HT/VHT capabilities */
a8243b72 2692 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2693 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2694 elems.ht_cap_elem, sta);
64f68e5d 2695
818255ea
MP		 2696 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2697 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2698 elems.vht_cap_elem, sta);
818255ea 2699
30eb1dc2
JB		 2700 /*
2701 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2702 * in their association response, so ignore that data for our own
2703 * configuration. If it changed since the last beacon, we'll get the
2704 * next beacon and update then.
2705 */
1128958d 2706
bee7f586
JB		 2707 /*
2708 * If an operating mode notification IE is present, override the
2709 * NSS calculation (that would be done in rate_control_rate_init())
2710 * and use the # of streams from that element.
2711 */
2712 if (elems.opmode_notif &&
2713 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2714 u8 nss;
2715
2716 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2717 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2718 nss += 1;
2719 sta->sta.rx_nss = nss;
2720 }
2721
4b7679a5 2722 rate_control_rate_init(sta);
f0706e82 2723
46900298 2724 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2725 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2726
ddf4ac53 2727 if (elems.wmm_param)
c2c98fde 2728 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2729
3e4d40fa 2730 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2731 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2732 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2733 if (err) {
bdcbd8e0
JB		 2734 sdata_info(sdata,
2735 "failed to move station %pM to desired state\n",
2736 sta->sta.addr);
c8987876
JB		 2737 WARN_ON(__sta_info_destroy(sta));
2738 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2739 ret = false;
2740 goto out;
c8987876
JB		 2741 }
2742
7852e361 2743 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2744
f2176d72
JO		 2745 /*
2746 * Always handle WMM once after association regardless
2747 * of the first value the AP uses. Setting -1 here has
2748 * that effect because the AP values is an unsigned
2749 * 4-bit value.
2750 */
2751 ifmgd->wmm_last_param_set = -1;
2752
ddf4ac53 2753 if (elems.wmm_param)
4ced3f74 2754 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2755 elems.wmm_param_len);
aa837e1d 2756 else
3abead59
JB		 2757 ieee80211_set_wmm_default(sdata, false);
2758 changed |= BSS_CHANGED_QOS;
f0706e82 2759
60f8b39c
JB		 2760 /* set AID and assoc capability,
2761 * ieee80211_set_associated() will tell the driver */
2762 bss_conf->aid = aid;
2763 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2764 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2765
d524215f
FF		 2766 /*
2767 * If we're using 4-addr mode, let the AP know that we're
2768 * doing so, so that it can create the STA VLAN on its side
2769 */
2770 if (ifmgd->use_4addr)
2771 ieee80211_send_4addr_nullfunc(local, sdata);
2772
15b7b062 2773 /*
b291ba11
JB		 2774 * Start timer to probe the connection to the AP now.
2775 * Also start the timer that will detect beacon loss.
15b7b062 2776 */
b291ba11 2777 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2778 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2779
35d865af
JB		 2780 ret = true;
2781 out:
2782 kfree(bss_ies);
2783 return ret;
f0706e82
JB		 2784}
2785
66e67e41
JB		 2786static enum rx_mgmt_action __must_check
2787ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2788 struct ieee80211_mgmt *mgmt, size_t len,
2789 struct cfg80211_bss **bss)
2790{
2791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2792 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2793 u16 capab_info, status_code, aid;
2794 struct ieee802_11_elems elems;
2795 u8 *pos;
2796 bool reassoc;
2797
2798 lockdep_assert_held(&ifmgd->mtx);
2799
2800 if (!assoc_data)
2801 return RX_MGMT_NONE;
b203ca39 2802 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2803 return RX_MGMT_NONE;
2804
2805 /*
2806 * AssocResp and ReassocResp have identical structure, so process both
2807 * of them in this function.
2808 */
2809
2810 if (len < 24 + 6)
2811 return RX_MGMT_NONE;
2812
2813 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2814 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2815 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2816 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2817
bdcbd8e0
JB		 2818 sdata_info(sdata,
2819 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2820 reassoc ? "Rea" : "A", mgmt->sa,
2821 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2822
2823 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2824 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2825
2826 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2827 elems.timeout_int &&
2828 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2829 u32 tu, ms;
79ba1d89 2830 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2831 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2832 sdata_info(sdata,
2833 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2834 mgmt->sa, tu, ms);
66e67e41 2835 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2836 assoc_data->timeout_started = true;
66e67e41
JB		 2837 if (ms > IEEE80211_ASSOC_TIMEOUT)
2838 run_again(ifmgd, assoc_data->timeout);
2839 return RX_MGMT_NONE;
2840 }
2841
2842 *bss = assoc_data->bss;
2843
2844 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2845 sdata_info(sdata, "%pM denied association (code=%d)\n",
2846 mgmt->sa, status_code);
66e67e41
JB		 2847 ieee80211_destroy_assoc_data(sdata, false);
2848 } else {
66e67e41
JB		 2849 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2850 /* oops -- internal error -- send timeout for now */
10a9109f 2851 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2852 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2853 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2854 }
635d999f 2855 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2856
2857 /*
2858 * destroy assoc_data afterwards, as otherwise an idle
2859 * recalc after assoc_data is NULL but before associated
2860 * is set can cause the interface to go idle
2861 */
2862 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2863 }
2864
2865 return RX_MGMT_CFG80211_RX_ASSOC;
2866}
8e3c1b77 2867
98c8fccf 2868static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2869 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2870 struct ieee80211_rx_status *rx_status,
d45c4172 2871 struct ieee802_11_elems *elems)
98c8fccf
JB		 2872{
2873 struct ieee80211_local *local = sdata->local;
2874 int freq;
c2b13452 2875 struct ieee80211_bss *bss;
98c8fccf 2876 struct ieee80211_channel *channel;
56007a02
JB		 2877 bool need_ps = false;
2878
b4f286a1
JB		 2879 lockdep_assert_held(&sdata->u.mgd.mtx);
2880
826262c3
JB		 2881 if ((sdata->u.mgd.associated &&
2882 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2883 (sdata->u.mgd.assoc_data &&
2884 ether_addr_equal(mgmt->bssid,
2885 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2886 /* not previously set so we may need to recalc */
826262c3
JB		 2887 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2888
2889 if (elems->tim && !elems->parse_error) {
4a3cb702 2890 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2891 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2892 }
56007a02 2893 }
98c8fccf 2894
1cd8e88e 2895 if (elems->ds_params)
59eb21a6
BR		 2896 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2897 rx_status->band);
98c8fccf
JB		 2898 else
2899 freq = rx_status->freq;
2900
2901 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2902
2903 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2904 return;
2905
98c8fccf 2906 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2907 channel);
77fdaa12
JB		 2908 if (bss)
2909 ieee80211_rx_bss_put(local, bss);
2910
37799e52
JB		 2911 if (!sdata->u.mgd.associated ||
2912 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
98c8fccf
JB		 2913 return;
2914
56007a02
JB		 2915 if (need_ps) {
2916 mutex_lock(&local->iflist_mtx);
2917 ieee80211_recalc_ps(local, -1);
2918 mutex_unlock(&local->iflist_mtx);
2919 }
2920
3670946f
JB		 2921 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2922 elems, true);
b4f286a1 2923
f0706e82
JB		 2924}
2925
2926
f698d856 2927static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2928 struct sk_buff *skb)
f0706e82 2929{
af6b6374 2930 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2931 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2932 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2933 size_t baselen, len = skb->len;
ae6a44e3
EK		 2934 struct ieee802_11_elems elems;
2935
15b7b062
KV		 2936 ifmgd = &sdata->u.mgd;
2937
77fdaa12
JB		 2938 ASSERT_MGD_MTX(ifmgd);
2939
b203ca39 2940 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2941 return; /* ignore ProbeResp to foreign address */
2942
ae6a44e3
EK		 2943 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2944 if (baselen > len)
2945 return;
2946
2947 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2948 false, &elems);
ae6a44e3 2949
d45c4172 2950 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2951
77fdaa12 2952 if (ifmgd->associated &&
b203ca39 2953 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2954 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2955
2956 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2957 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2958 /* got probe response, continue with auth */
bdcbd8e0 2959 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2960 ifmgd->auth_data->tries = 0;
2961 ifmgd->auth_data->timeout = jiffies;
89afe614 2962 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2963 run_again(ifmgd, ifmgd->auth_data->timeout);
2964 }
f0706e82
JB		 2965}
2966
d91f36db
JB		 2967/*
2968 * This is the canonical list of information elements we care about,
2969 * the filter code also gives us all changes to the Microsoft OUI
2970 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2971 *
2972 * We implement beacon filtering in software since that means we can
2973 * avoid processing the frame here and in cfg80211, and userspace
2974 * will not be able to tell whether the hardware supports it or not.
2975 *
2976 * XXX: This list needs to be dynamic -- userspace needs to be able to
2977 * add items it requires. It also needs to be able to tell us to
2978 * look out for other vendor IEs.
2979 */
2980static const u64 care_about_ies =
1d4df3a5
JB		 2981 (1ULL << WLAN_EID_COUNTRY) |
2982 (1ULL << WLAN_EID_ERP_INFO) |
2983 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2984 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2985 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2986 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2987
30eb1dc2
JB		 2988static enum rx_mgmt_action
2989ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2990 struct ieee80211_mgmt *mgmt, size_t len,
2991 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2992{
d91f36db 2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2994 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2995 size_t baselen;
2996 struct ieee802_11_elems elems;
f698d856 2997 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2998 struct ieee80211_chanctx_conf *chanctx_conf;
2999 struct ieee80211_channel *chan;
bee7f586 3000 struct sta_info *sta;
471b3efd 3001 u32 changed = 0;
f87ad637 3002 bool erp_valid;
7a5158ef 3003 u8 erp_value = 0;
d91f36db 3004 u32 ncrc;
77fdaa12
JB		 3005 u8 *bssid;
3006
66e67e41 3007 lockdep_assert_held(&ifmgd->mtx);
f0706e82 3008
ae6a44e3
EK		 3009 /* Process beacon from the current BSS */
3010 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3011 if (baselen > len)
30eb1dc2 3012 return RX_MGMT_NONE;
ae6a44e3 3013
55de908a
JB		 3014 rcu_read_lock();
3015 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3016 if (!chanctx_conf) {
3017 rcu_read_unlock();
30eb1dc2 3018 return RX_MGMT_NONE;
55de908a
JB		 3019 }
3020
4bf88530 3021 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3022 rcu_read_unlock();
30eb1dc2 3023 return RX_MGMT_NONE;
55de908a 3024 }
4bf88530 3025 chan = chanctx_conf->def.chan;
55de908a 3026 rcu_read_unlock();
f0706e82 3027
c65dd147 3028 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3029 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3030 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3031 len - baselen, false, &elems);
77fdaa12 3032
d45c4172 3033 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 3034 ifmgd->assoc_data->have_beacon = true;
c65dd147 3035 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3036 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3037 sdata->vif.bss_conf.sync_tsf =
3038 le64_to_cpu(mgmt->u.beacon.timestamp);
3039 sdata->vif.bss_conf.sync_device_ts =
3040 rx_status->device_timestamp;
3041 if (elems.tim)
3042 sdata->vif.bss_conf.sync_dtim_count =
3043 elems.tim->dtim_count;
3044 else
3045 sdata->vif.bss_conf.sync_dtim_count = 0;
3046 }
66e67e41
JB		 3047 /* continue assoc process */
3048 ifmgd->assoc_data->timeout = jiffies;
89afe614 3049 ifmgd->assoc_data->timeout_started = true;
66e67e41 3050 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 3051 return RX_MGMT_NONE;
66e67e41 3052 }
77fdaa12 3053
66e67e41 3054 if (!ifmgd->associated ||
b203ca39 3055 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 3056 return RX_MGMT_NONE;
66e67e41 3057 bssid = ifmgd->associated->bssid;
f0706e82 3058
17e4ec14
JM		 3059 /* Track average RSSI from the Beacon frames of the current AP */
3060 ifmgd->last_beacon_signal = rx_status->signal;
3061 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3062 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3063 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3064 ifmgd->last_cqm_event_signal = 0;
391a200a 3065 ifmgd->count_beacon_signal = 1;
615f7b9b 3066 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3067 } else {
3068 ifmgd->ave_beacon_signal =
3069 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3070 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3071 ifmgd->ave_beacon_signal) / 16;
391a200a 3072 ifmgd->count_beacon_signal++;
17e4ec14 3073 }
615f7b9b
MV		 3074
3075 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3076 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
ad9550e5 3077 int sig = ifmgd->ave_beacon_signal / 16;
615f7b9b
MV		 3078 int last_sig = ifmgd->last_ave_beacon_signal;
3079
3080 /*
3081 * if signal crosses either of the boundaries, invoke callback
3082 * with appropriate parameters
3083 */
3084 if (sig > ifmgd->rssi_max_thold &&
3085 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3086 ifmgd->last_ave_beacon_signal = sig;
887da917 3087 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3088 } else if (sig < ifmgd->rssi_min_thold &&
3089 (last_sig >= ifmgd->rssi_max_thold ||
3090 last_sig == 0)) {
3091 ifmgd->last_ave_beacon_signal = sig;
887da917 3092 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3093 }
3094 }
3095
17e4ec14 3096 if (bss_conf->cqm_rssi_thold &&
391a200a 3097 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3098 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3099 int sig = ifmgd->ave_beacon_signal / 16;
3100 int last_event = ifmgd->last_cqm_event_signal;
3101 int thold = bss_conf->cqm_rssi_thold;
3102 int hyst = bss_conf->cqm_rssi_hyst;
3103 if (sig < thold &&
3104 (last_event == 0 || sig < last_event - hyst)) {
3105 ifmgd->last_cqm_event_signal = sig;
3106 ieee80211_cqm_rssi_notify(
3107 &sdata->vif,
3108 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3109 GFP_KERNEL);
3110 } else if (sig > thold &&
3111 (last_event == 0 || sig > last_event + hyst)) {
3112 ifmgd->last_cqm_event_signal = sig;
3113 ieee80211_cqm_rssi_notify(
3114 &sdata->vif,
3115 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3116 GFP_KERNEL);
3117 }
3118 }
3119
b291ba11 3120 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 3121 mlme_dbg_ratelimited(sdata,
112c31f0 3122 "cancelling AP probe due to a received beacon\n");
925e64c3 3123 mutex_lock(&local->mtx);
b291ba11 3124 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 3125 ieee80211_run_deferred_scan(local);
3126 mutex_unlock(&local->mtx);
3127
4e751843
JB		 3128 mutex_lock(&local->iflist_mtx);
3129 ieee80211_recalc_ps(local, -1);
3130 mutex_unlock(&local->iflist_mtx);
92778180
JM		 3131 }
3132
b291ba11
JB		 3133 /*
3134 * Push the beacon loss detection into the future since
3135 * we are processing a beacon from the AP just now.
3136 */
d3a910a8 3137 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3138
d91f36db
JB		 3139 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3140 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3141 len - baselen, false, &elems,
d91f36db
JB		 3142 care_about_ies, ncrc);
3143
25c9c875 3144 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3145 bool directed_tim = ieee80211_check_tim(elems.tim,
3146 elems.tim_len,
3147 ifmgd->aid);
1fb3606b 3148 if (directed_tim) {
572e0012 3149 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3150 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3151 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3152 ieee80211_hw_config(local,
3153 IEEE80211_CONF_CHANGE_PS);
3154 }
572e0012 3155 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3156 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3157 local->pspolling = true;
3158
3159 /*
3160 * Here is assumed that the driver will be
3161 * able to send ps-poll frame and receive a
3162 * response even though power save mode is
3163 * enabled, but some drivers might require
3164 * to disable power save here. This needs
3165 * to be investigated.
3166 */
3167 ieee80211_send_pspoll(local, sdata);
3168 }
a97b77b9
VN		 3169 }
3170 }
7a5158ef 3171
488dd7b5 3172 if (sdata->vif.p2p) {
67baf663 3173 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3174 int ret;
3175
3176 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3177 len - baselen,
3178 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3179 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3180 if (ret >= 2) {
3181 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3182 /* valid noa_attr and index changed */
3183 sdata->u.mgd.p2p_noa_index = noa.index;
3184 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3185 changed |= BSS_CHANGED_P2P_PS;
3186 /*
3187 * make sure we update all information, the CRC
3188 * mechanism doesn't look at P2P attributes.
3189 */
3190 ifmgd->beacon_crc_valid = false;
3191 }
3192 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3193 /* noa_attr not found and we had valid noa_attr before */
3194 sdata->u.mgd.p2p_noa_index = -1;
3195 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3196 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3197 ifmgd->beacon_crc_valid = false;
3198 }
3199 }
3200
d8ec4433 3201 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 3202 return RX_MGMT_NONE;
30196673 3203 ifmgd->beacon_crc = ncrc;
d8ec4433 3204 ifmgd->beacon_crc_valid = true;
30196673 3205
d45c4172 3206 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 3207
3208 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3209 elems.wmm_param_len))
3210 changed |= BSS_CHANGED_QOS;
3211
c65dd147
EG		 3212 /*
3213 * If we haven't had a beacon before, tell the driver about the
ef429dad 3214 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3215 */
3216 if (!bss_conf->dtim_period) {
3217 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3218 if (elems.tim)
3219 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3220 else
3221 bss_conf->dtim_period = 1;
ef429dad
JB		 3222
3223 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3224 sdata->vif.bss_conf.sync_tsf =
3225 le64_to_cpu(mgmt->u.beacon.timestamp);
3226 sdata->vif.bss_conf.sync_device_ts =
3227 rx_status->device_timestamp;
3228 if (elems.tim)
3229 sdata->vif.bss_conf.sync_dtim_count =
3230 elems.tim->dtim_count;
3231 else
3232 sdata->vif.bss_conf.sync_dtim_count = 0;
3233 }
3234
c65dd147
EG		 3235 changed |= BSS_CHANGED_DTIM_PERIOD;
3236 }
3237
1946bed9 3238 if (elems.erp_info) {
7a5158ef
JB		 3239 erp_valid = true;
3240 erp_value = elems.erp_info[0];
3241 } else {
3242 erp_valid = false;
50c4afb9 3243 }
7a5158ef
JB		 3244 changed |= ieee80211_handle_bss_capability(sdata,
3245 le16_to_cpu(mgmt->u.beacon.capab_info),
3246 erp_valid, erp_value);
f0706e82 3247
1128958d 3248 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3249 sta = sta_info_get(sdata, bssid);
3250
30eb1dc2
JB		 3251 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3252 elems.vht_operation, bssid, &changed)) {
3253 mutex_unlock(&local->sta_mtx);
3254 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3255 WLAN_REASON_DEAUTH_LEAVING,
3256 true, deauth_buf);
3257 return RX_MGMT_CFG80211_TX_DEAUTH;
3258 }
bee7f586
JB		 3259
3260 if (sta && elems.opmode_notif)
3261 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3262 rx_status->band, true);
1128958d 3263 mutex_unlock(&local->sta_mtx);
d3c990fb 3264
04b7b2ff
JB		 3265 if (elems.country_elem && elems.pwr_constr_elem &&
3266 mgmt->u.probe_resp.capab_info &
3267 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3268 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3269 elems.country_elem,
3270 elems.country_elem_len,
3271 elems.pwr_constr_elem);
3f2355cb 3272
471b3efd 3273 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3274
3275 return RX_MGMT_NONE;
f0706e82
JB		 3276}
3277
1fa57d01
JB		 3278void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3279 struct sk_buff *skb)
f0706e82 3280{
77fdaa12 3281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3282 struct ieee80211_rx_status *rx_status;
f0706e82 3283 struct ieee80211_mgmt *mgmt;
66e67e41 3284 struct cfg80211_bss *bss = NULL;
77fdaa12 3285 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3286 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82 3287 u16 fc;
1b3a2e49
JB		 3288 struct ieee802_11_elems elems;
3289 int ies_len;
f0706e82 3290
f0706e82
JB		 3291 rx_status = (struct ieee80211_rx_status *) skb->cb;
3292 mgmt = (struct ieee80211_mgmt *) skb->data;
3293 fc = le16_to_cpu(mgmt->frame_control);
3294
77fdaa12
JB		 3295 mutex_lock(&ifmgd->mtx);
3296
66e67e41
JB		 3297 switch (fc & IEEE80211_FCTL_STYPE) {
3298 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3299 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3300 deauth_buf, rx_status);
66e67e41
JB		 3301 break;
3302 case IEEE80211_STYPE_PROBE_RESP:
3303 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3304 break;
3305 case IEEE80211_STYPE_AUTH:
3306 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3307 break;
3308 case IEEE80211_STYPE_DEAUTH:
3309 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3310 break;
3311 case IEEE80211_STYPE_DISASSOC:
3312 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3313 break;
3314 case IEEE80211_STYPE_ASSOC_RESP:
3315 case IEEE80211_STYPE_REASSOC_RESP:
3316 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3317 break;
3318 case IEEE80211_STYPE_ACTION:
37799e52 3319 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3320 ies_len = skb->len -
3321 offsetof(struct ieee80211_mgmt,
3322 u.action.u.chan_switch.variable);
37799e52
JB		 3323
3324 if (ies_len < 0)
3325 break;
3326
3327 ieee802_11_parse_elems(
3328 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3329 ies_len, true, &elems);
37799e52
JB		 3330
3331 if (elems.parse_error)
3332 break;
3333
1b3a2e49
JB		 3334 ieee80211_sta_process_chanswitch(sdata,
3335 rx_status->mactime,
3670946f 3336 &elems, false);
1b3a2e49
JB		 3337 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3338 ies_len = skb->len -
3339 offsetof(struct ieee80211_mgmt,
3340 u.action.u.ext_chan_switch.variable);
3341
3342 if (ies_len < 0)
3343 break;
3344
3345 ieee802_11_parse_elems(
3346 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3347 ies_len, true, &elems);
1b3a2e49
JB		 3348
3349 if (elems.parse_error)
3350 break;
3351
3352 /* for the handling code pretend this was also an IE */
3353 elems.ext_chansw_ie =
3354 &mgmt->u.action.u.ext_chan_switch.data;
3355
66e67e41 3356 ieee80211_sta_process_chanswitch(sdata,
37799e52 3357 rx_status->mactime,
3670946f 3358 &elems, false);
77fdaa12 3359 }
37799e52 3360 break;
77fdaa12 3361 }
77fdaa12
JB		 3362 mutex_unlock(&ifmgd->mtx);
3363
66e67e41
JB		 3364 switch (rma) {
3365 case RX_MGMT_NONE:
3366 /* no action */
3367 break;
3368 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3369 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3370 break;
3371 case RX_MGMT_CFG80211_DISASSOC:
3372 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3373 break;
3374 case RX_MGMT_CFG80211_RX_AUTH:
3375 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3376 break;
3377 case RX_MGMT_CFG80211_RX_ASSOC:
3378 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3379 break;
3380 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3381 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3382 break;
30eb1dc2
JB		 3383 case RX_MGMT_CFG80211_TX_DEAUTH:
3384 cfg80211_send_deauth(sdata->dev, deauth_buf,
3385 sizeof(deauth_buf));
3386 break;
66e67e41
JB		 3387 default:
3388 WARN(1, "unexpected: %d", rma);
b054b747 3389 }
f0706e82
JB		 3390}
3391
9c6bd790 3392static void ieee80211_sta_timer(unsigned long data)
f0706e82 3393{
60f8b39c
JB		 3394 struct ieee80211_sub_if_data *sdata =
3395 (struct ieee80211_sub_if_data *) data;
5bb644a0 3396
9b7d72c1 3397 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3398}
3399
04ac3c0e 3400static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3401 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3402{
04ac3c0e 3403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3404 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3405
37ad3888 3406 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3407 tx, frame_buf);
04ac3c0e 3408 mutex_unlock(&ifmgd->mtx);
37ad3888 3409
04ac3c0e
FF		 3410 /*
3411 * must be outside lock due to cfg80211,
3412 * but that's not a problem.
3413 */
6ae16775 3414 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3415
04ac3c0e
FF		 3416 mutex_lock(&ifmgd->mtx);
3417}
3418
66e67e41
JB		 3419static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3420{
3421 struct ieee80211_local *local = sdata->local;
3422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3423 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3424 u32 tx_flags = 0;
66e67e41
JB		 3425
3426 lockdep_assert_held(&ifmgd->mtx);
3427
3428 if (WARN_ON_ONCE(!auth_data))
3429 return -EINVAL;
3430
66e67e41
JB		 3431 auth_data->tries++;
3432
3433 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3434 sdata_info(sdata, "authentication with %pM timed out\n",
3435 auth_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, auth_data->bss);
3442
3443 return -ETIMEDOUT;
3444 }
3445
a1845fc7
JB		 3446 drv_mgd_prepare_tx(local, sdata);
3447
66e67e41 3448 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3449 u16 trans = 1;
3450 u16 status = 0;
3451
bdcbd8e0
JB		 3452 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3453 auth_data->bss->bssid, auth_data->tries,
3454 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3455
3456 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3457
3458 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3459 trans = auth_data->sae_trans;
3460 status = auth_data->sae_status;
3461 auth_data->expected_transaction = trans;
3462 }
3463
6211dd12
SG		 3464 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3465 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3466 IEEE80211_TX_INTFL_MLME_CONN_TX;
3467
6b8ece3a
JM		 3468 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3469 auth_data->data, auth_data->data_len,
66e67e41 3470 auth_data->bss->bssid,
1672c0e3
JB		 3471 auth_data->bss->bssid, NULL, 0, 0,
3472 tx_flags);
66e67e41
JB		 3473 } else {
3474 const u8 *ssidie;
3475
bdcbd8e0
JB		 3476 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3477 auth_data->bss->bssid, auth_data->tries,
3478 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3479
9caf0364 3480 rcu_read_lock();
66e67e41 3481 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3482 if (!ssidie) {
3483 rcu_read_unlock();
66e67e41 3484 return -EINVAL;
9caf0364 3485 }
66e67e41
JB		 3486 /*
3487 * Direct probe is sent to broadcast address as some APs
3488 * will not answer to direct packet in unassociated state.
3489 */
3490 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3491 NULL, 0, (u32) -1, true, 0,
55de908a 3492 auth_data->bss->channel, false);
9caf0364 3493 rcu_read_unlock();
66e67e41
JB		 3494 }
3495
6211dd12 3496 if (tx_flags == 0) {
1672c0e3 3497 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
e0f23666 3498 auth_data->timeout_started = true;
1672c0e3 3499 run_again(ifmgd, auth_data->timeout);
89afe614 3500 } else {
e0f23666
JB		 3501 auth_data->timeout =
3502 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3503 auth_data->timeout_started = true;
3504 run_again(ifmgd, auth_data->timeout);
1672c0e3 3505 }
66e67e41
JB		 3506
3507 return 0;
3508}
3509
3510static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3511{
3512 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3513 struct ieee80211_local *local = sdata->local;
3514
3515 lockdep_assert_held(&sdata->u.mgd.mtx);
3516
66e67e41
JB		 3517 assoc_data->tries++;
3518 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3519 sdata_info(sdata, "association with %pM timed out\n",
3520 assoc_data->bss->bssid);
66e67e41
JB		 3521
3522 /*
3523 * Most likely AP is not in the range so remove the
3524 * bss struct for that AP.
3525 */
3526 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3527
3528 return -ETIMEDOUT;
3529 }
3530
bdcbd8e0
JB		 3531 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3532 assoc_data->bss->bssid, assoc_data->tries,
3533 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3534 ieee80211_send_assoc(sdata);
3535
1672c0e3
JB		 3536 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3537 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3538 assoc_data->timeout_started = true;
1672c0e3 3539 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614 3540 } else {
e0f23666
JB		 3541 assoc_data->timeout =
3542 round_jiffies_up(jiffies +
3543 IEEE80211_ASSOC_TIMEOUT_LONG);
3544 assoc_data->timeout_started = true;
3545 run_again(&sdata->u.mgd, assoc_data->timeout);
1672c0e3 3546 }
66e67e41
JB		 3547
3548 return 0;
3549}
3550
1672c0e3
JB		 3551void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3552 __le16 fc, bool acked)
3553{
3554 struct ieee80211_local *local = sdata->local;
3555
3556 sdata->u.mgd.status_fc = fc;
3557 sdata->u.mgd.status_acked = acked;
3558 sdata->u.mgd.status_received = true;
3559
3560 ieee80211_queue_work(&local->hw, &sdata->work);
3561}
3562
1fa57d01 3563void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3564{
9c6bd790 3565 struct ieee80211_local *local = sdata->local;
1fa57d01 3566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3567
77fdaa12
JB		 3568 mutex_lock(&ifmgd->mtx);
3569
1672c0e3
JB		 3570 if (ifmgd->status_received) {
3571 __le16 fc = ifmgd->status_fc;
3572 bool status_acked = ifmgd->status_acked;
3573
3574 ifmgd->status_received = false;
3575 if (ifmgd->auth_data &&
3576 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3577 if (status_acked) {
3578 ifmgd->auth_data->timeout =
3579 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3580 run_again(ifmgd, ifmgd->auth_data->timeout);
3581 } else {
3582 ifmgd->auth_data->timeout = jiffies - 1;
3583 }
89afe614 3584 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3585 } else if (ifmgd->assoc_data &&
3586 (ieee80211_is_assoc_req(fc) ||
3587 ieee80211_is_reassoc_req(fc))) {
3588 if (status_acked) {
3589 ifmgd->assoc_data->timeout =
3590 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3591 run_again(ifmgd, ifmgd->assoc_data->timeout);
3592 } else {
3593 ifmgd->assoc_data->timeout = jiffies - 1;
3594 }
89afe614 3595 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3596 }
3597 }
3598
89afe614 3599 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3600 time_after(jiffies, ifmgd->auth_data->timeout)) {
3601 if (ifmgd->auth_data->done) {
3602 /*
3603 * ok ... we waited for assoc but userspace didn't,
3604 * so let's just kill the auth data
3605 */
3606 ieee80211_destroy_auth_data(sdata, false);
3607 } else if (ieee80211_probe_auth(sdata)) {
3608 u8 bssid[ETH_ALEN];
3609
3610 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3611
3612 ieee80211_destroy_auth_data(sdata, false);
3613
3614 mutex_unlock(&ifmgd->mtx);
3615 cfg80211_send_auth_timeout(sdata->dev, bssid);
3616 mutex_lock(&ifmgd->mtx);
3617 }
89afe614 3618 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3619 run_again(ifmgd, ifmgd->auth_data->timeout);
3620
89afe614 3621 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3622 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3623 if ((ifmgd->assoc_data->need_beacon &&
3624 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3625 ieee80211_do_assoc(sdata)) {
3626 u8 bssid[ETH_ALEN];
3627
3628 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3629
3630 ieee80211_destroy_assoc_data(sdata, false);
3631
3632 mutex_unlock(&ifmgd->mtx);
3633 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3634 mutex_lock(&ifmgd->mtx);
3635 }
89afe614 3636 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3637 run_again(ifmgd, ifmgd->assoc_data->timeout);
3638
b291ba11
JB		 3639 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3640 IEEE80211_STA_CONNECTION_POLL) &&
3641 ifmgd->associated) {
a43abf29 3642 u8 bssid[ETH_ALEN];
72a8a3ed 3643 int max_tries;
a43abf29 3644
0c1ad2ca 3645 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3646
72a8a3ed 3647 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3648 max_tries = max_nullfunc_tries;
72a8a3ed 3649 else
180205bd 3650 max_tries = max_probe_tries;
72a8a3ed 3651
4e5ff376
FF		 3652 /* ACK received for nullfunc probing frame */
3653 if (!ifmgd->probe_send_count)
3654 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3655 else if (ifmgd->nullfunc_failed) {
3656 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3657 mlme_dbg(sdata,
3658 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3659 bssid, ifmgd->probe_send_count,
3660 max_tries);
04ac3c0e
FF		 3661 ieee80211_mgd_probe_ap_send(sdata);
3662 } else {
bdcbd8e0
JB		 3663 mlme_dbg(sdata,
3664 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3665 bssid);
95acac61 3666 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3667 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3668 false);
04ac3c0e
FF		 3669 }
3670 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3671 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3672 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3673 mlme_dbg(sdata,
3674 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3675 bssid, probe_wait_ms);
95acac61 3676 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3677 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3678 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3679 mlme_dbg(sdata,
3680 "No probe response from AP %pM after %dms, try %d/%i\n",
3681 bssid, probe_wait_ms,
3682 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3683 ieee80211_mgd_probe_ap_send(sdata);
3684 } else {
b291ba11
JB		 3685 /*
3686 * We actually lost the connection ... or did we?
3687 * Let's make sure!
3688 */
b38afa87
BG		 3689 wiphy_debug(local->hw.wiphy,
3690 "%s: No probe response from AP %pM"
3691 " after %dms, disconnecting.\n",
3692 sdata->name,
180205bd 3693 bssid, probe_wait_ms);
04ac3c0e 3694
95acac61 3695 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3696 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3697 }
3698 }
3699
77fdaa12 3700 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3701}
3702
b291ba11
JB		 3703static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3704{
3705 struct ieee80211_sub_if_data *sdata =
3706 (struct ieee80211_sub_if_data *) data;
3707 struct ieee80211_local *local = sdata->local;
3708
3709 if (local->quiescing)
3710 return;
3711
682bd38b 3712 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3713 ieee80211_queue_work(&sdata->local->hw,
3714 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3715}
3716
3717static void ieee80211_sta_conn_mon_timer(unsigned long data)
3718{
3719 struct ieee80211_sub_if_data *sdata =
3720 (struct ieee80211_sub_if_data *) data;
3721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3722 struct ieee80211_local *local = sdata->local;
3723
3724 if (local->quiescing)
3725 return;
3726
42935eca 3727 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3728}
3729
3730static void ieee80211_sta_monitor_work(struct work_struct *work)
3731{
3732 struct ieee80211_sub_if_data *sdata =
3733 container_of(work, struct ieee80211_sub_if_data,
3734 u.mgd.monitor_work);
3735
3736 ieee80211_mgd_probe_ap(sdata, false);
3737}
3738
9c6bd790
JB		 3739static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3740{
494f1fe5
EP		 3741 u32 flags;
3742
ad935687 3743 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3744 __ieee80211_stop_poll(sdata);
ad935687 3745
b291ba11 3746 /* let's probe the connection once */
494f1fe5
EP		 3747 flags = sdata->local->hw.flags;
3748 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3749 ieee80211_queue_work(&sdata->local->hw,
3750 &sdata->u.mgd.monitor_work);
b291ba11 3751 /* and do all the other regular work too */
64592c8f 3752 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3753 }
9c6bd790 3754}
f0706e82 3755
b8360ab8 3756#ifdef CONFIG_PM
ef55c176
JB		 3757void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3758{
3759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3760 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3761
3762 mutex_lock(&ifmgd->mtx);
3763
3764 if (ifmgd->auth_data) {
3765 /*
3766 * If we are trying to authenticate while suspending, cfg80211
3767 * won't know and won't actually abort those attempts, thus we
3768 * need to do that ourselves.
3769 */
3770 ieee80211_send_deauth_disassoc(sdata,
3771 ifmgd->auth_data->bss->bssid,
3772 IEEE80211_STYPE_DEAUTH,
3773 WLAN_REASON_DEAUTH_LEAVING,
3774 false, frame_buf);
3775 ieee80211_destroy_auth_data(sdata, false);
3776 cfg80211_send_deauth(sdata->dev, frame_buf,
3777 IEEE80211_DEAUTH_FRAME_LEN);
3778 }
3779
3780 mutex_unlock(&ifmgd->mtx);
3781}
3782
b8360ab8
JB		 3783void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3784{
3785 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3786
3787 mutex_lock(&ifmgd->mtx);
3788 if (!ifmgd->associated) {
3789 mutex_unlock(&ifmgd->mtx);
3790 return;
3791 }
3792
3793 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3794 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3795 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3796 ieee80211_sta_connection_lost(sdata,
3797 ifmgd->associated->bssid,
3798 WLAN_REASON_UNSPECIFIED,
3799 true);
3800 mutex_unlock(&ifmgd->mtx);
3801 return;
3802 }
3803 mutex_unlock(&ifmgd->mtx);
3804}
3805#endif
3806
9c6bd790
JB		 3807/* interface setup */
3808void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3809{
46900298 3810 struct ieee80211_if_managed *ifmgd;
988c0f72 3811
46900298 3812 ifmgd = &sdata->u.mgd;
b291ba11 3813 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3814 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3815 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3816 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3817 INIT_WORK(&ifmgd->csa_connection_drop_work,
3818 ieee80211_csa_connection_drop_work);
d1f5b7a3 3819 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3820 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3821 (unsigned long) sdata);
b291ba11
JB		 3822 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3823 (unsigned long) sdata);
3824 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3825 (unsigned long) sdata);
46900298 3826 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3827 (unsigned long) sdata);
9c6bd790 3828
ab1faead 3829 ifmgd->flags = 0;
1478acb3 3830 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3831 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3832 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3833 ifmgd->p2p_noa_index = -1;
bbbdff9e 3834
77fdaa12 3835 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3836
3837 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3838 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3839 else
3840 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3841}
3842
77fdaa12
JB		 3843/* scan finished notification */
3844void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3845{
31ee67a1 3846 struct ieee80211_sub_if_data *sdata;
60f8b39c 3847
77fdaa12
JB		 3848 /* Restart STA timers */
3849 rcu_read_lock();
370bd005
BG		 3850 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3851 if (ieee80211_sdata_running(sdata))
3852 ieee80211_restart_sta_timer(sdata);
3853 }
77fdaa12
JB		 3854 rcu_read_unlock();
3855}
60f8b39c 3856
77fdaa12
JB		 3857int ieee80211_max_network_latency(struct notifier_block *nb,
3858 unsigned long data, void *dummy)
3859{
3860 s32 latency_usec = (s32) data;
3861 struct ieee80211_local *local =
3862 container_of(nb, struct ieee80211_local,
3863 network_latency_notifier);
1fa6f4af 3864
77fdaa12
JB		 3865 mutex_lock(&local->iflist_mtx);
3866 ieee80211_recalc_ps(local, latency_usec);
3867 mutex_unlock(&local->iflist_mtx);
dfe67012 3868
77fdaa12 3869 return 0;
9c6bd790
JB		 3870}
3871
f2d9d270
JB		 3872static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3873 struct cfg80211_bss *cbss)
3874{
3875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3876 const u8 *ht_cap_ie, *vht_cap_ie;
3877 const struct ieee80211_ht_cap *ht_cap;
3878 const struct ieee80211_vht_cap *vht_cap;
3879 u8 chains = 1;
3880
3881 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3882 return chains;
3883
9caf0364 3884 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3885 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3886 ht_cap = (void *)(ht_cap_ie + 2);
3887 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3888 /*
3889 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3890 * "Tx Unequal Modulation Supported" fields.
3891 */
3892 }
3893
3894 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3895 return chains;
3896
9caf0364 3897 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3898 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3899 u8 nss;
3900 u16 tx_mcs_map;
3901
3902 vht_cap = (void *)(vht_cap_ie + 2);
3903 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3904 for (nss = 8; nss > 0; nss--) {
3905 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3906 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3907 break;
3908 }
3909 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3910 chains = max(chains, nss);
3911 }
3912
3913 return chains;
3914}
3915
b17166a7
JB		 3916static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3917 struct cfg80211_bss *cbss)
a1cf775d
JB		 3918{
3919 struct ieee80211_local *local = sdata->local;
3920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3921 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3922 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3923 struct ieee80211_supported_band *sband;
4bf88530 3924 struct cfg80211_chan_def chandef;
f2d9d270 3925 int ret;
a1cf775d 3926
24398e39
JB		 3927 sband = local->hw.wiphy->bands[cbss->channel->band];
3928
f2d9d270
JB		 3929 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3930 IEEE80211_STA_DISABLE_80P80MHZ |
3931 IEEE80211_STA_DISABLE_160MHZ);
3932
9caf0364
JB		 3933 rcu_read_lock();
3934
f2d9d270
JB		 3935 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3936 sband->ht_cap.ht_supported) {
08e6effa 3937 const u8 *ht_oper_ie, *ht_cap;
24398e39 3938
9caf0364 3939 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3940 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3941 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3942
3943 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3944 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3945 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3946 ht_oper = NULL;
3947 }
24398e39
JB		 3948 }
3949
f2d9d270
JB		 3950 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3951 sband->vht_cap.vht_supported) {
08e6effa 3952 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3953
9caf0364
JB		 3954 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3955 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3956 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3957 vht_oper = (void *)(vht_oper_ie + 2);
3958 if (vht_oper && !ht_oper) {
3959 vht_oper = NULL;
bdcbd8e0 3960 sdata_info(sdata,
f2d9d270 3961 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3962 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3963 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3964 }
08e6effa
JB		 3965
3966 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3967 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3968 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3969 vht_oper = NULL;
3970 }
24398e39
JB		 3971 }
3972
f2d9d270
JB		 3973 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3974 cbss->channel,
3975 ht_oper, vht_oper,
7febdf14 3976 &chandef, false);
04ecd257 3977
f2d9d270
JB		 3978 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3979 local->rx_chains);
24398e39 3980
9caf0364
JB		 3981 rcu_read_unlock();
3982
04ecd257
JB		 3983 /* will change later if needed */
3984 sdata->smps_mode = IEEE80211_SMPS_OFF;
3985
f2d9d270
JB		 3986 /*
3987 * If this fails (possibly due to channel context sharing
3988 * on incompatible channels, e.g. 80+80 and 160 sharing the
3989 * same control channel) try to use a smaller bandwidth.
3990 */
3991 ret = ieee80211_vif_use_channel(sdata, &chandef,
3992 IEEE80211_CHANCTX_SHARED);
d601cd8d 3993 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3994 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3995 ret = ieee80211_vif_use_channel(sdata, &chandef,
3996 IEEE80211_CHANCTX_SHARED);
3997 }
f2d9d270 3998 return ret;
b17166a7
JB		 3999}
4000
4001static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4002 struct cfg80211_bss *cbss, bool assoc)
4003{
4004 struct ieee80211_local *local = sdata->local;
4005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4006 struct ieee80211_bss *bss = (void *)cbss->priv;
4007 struct sta_info *new_sta = NULL;
4008 bool have_sta = false;
4009 int err;
4010
4011 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4012 return -EINVAL;
4013
4014 if (assoc) {
4015 rcu_read_lock();
4016 have_sta = sta_info_get(sdata, cbss->bssid);
4017 rcu_read_unlock();
4018 }
4019
4020 if (!have_sta) {
4021 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4022 if (!new_sta)
4023 return -ENOMEM;
4024 }
4025
13e0c8e3 4026 if (new_sta) {
5d6a1b06
JB		 4027 u32 rates = 0, basic_rates = 0;
4028 bool have_higher_than_11mbit;
4029 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 4030 struct ieee80211_supported_band *sband;
8cef2c9d 4031 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 4032
4033 sband = local->hw.wiphy->bands[cbss->channel->band];
4034
4035 err = ieee80211_prep_channel(sdata, cbss);
4036 if (err) {
4037 sta_info_free(local, new_sta);
4038 return err;
4039 }
5d6a1b06 4040
5d6a1b06
JB		 4041 ieee80211_get_rates(sband, bss->supp_rates,
4042 bss->supp_rates_len,
4043 &rates, &basic_rates,
4044 &have_higher_than_11mbit,
4045 &min_rate, &min_rate_index);
4046
4047 /*
4048 * This used to be a workaround for basic rates missing
4049 * in the association response frame. Now that we no
4050 * longer use the basic rates from there, it probably
4051 * doesn't happen any more, but keep the workaround so
4052 * in case some *other* APs are buggy in different ways
4053 * we can connect -- with a warning.
4054 */
4055 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4056 sdata_info(sdata,
4057 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4058 basic_rates = BIT(min_rate_index);
4059 }
4060
13e0c8e3 4061 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4062 sdata->vif.bss_conf.basic_rates = basic_rates;
4063
4064 /* cf. IEEE 802.11 9.2.12 */
55de908a 4065 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4066 have_higher_than_11mbit)
4067 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4068 else
4069 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4070
4071 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4072
8c358bcd
JB		 4073 /* set timing information */
4074 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4075 rcu_read_lock();
ef429dad
JB		 4076 ies = rcu_dereference(cbss->beacon_ies);
4077 if (ies) {
4078 const u8 *tim_ie;
4079
4080 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4081 sdata->vif.bss_conf.sync_device_ts =
4082 bss->device_ts_beacon;
4083 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4084 ies->data, ies->len);
4085 if (tim_ie && tim_ie[1] >= 2)
4086 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4087 else
4088 sdata->vif.bss_conf.sync_dtim_count = 0;
4089 } else if (!(local->hw.flags &
4090 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4091 ies = rcu_dereference(cbss->proberesp_ies);
4092 /* must be non-NULL since beacon IEs were NULL */
4093 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4094 sdata->vif.bss_conf.sync_device_ts =
4095 bss->device_ts_presp;
4096 sdata->vif.bss_conf.sync_dtim_count = 0;
4097 } else {
4098 sdata->vif.bss_conf.sync_tsf = 0;
4099 sdata->vif.bss_conf.sync_device_ts = 0;
4100 sdata->vif.bss_conf.sync_dtim_count = 0;
4101 }
8cef2c9d 4102 rcu_read_unlock();
8c358bcd
JB		 4103
4104 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4105 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4106 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4107 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4108
4109 if (assoc)
13e0c8e3 4110 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4111
13e0c8e3
JB		 4112 err = sta_info_insert(new_sta);
4113 new_sta = NULL;
a1cf775d 4114 if (err) {
bdcbd8e0
JB		 4115 sdata_info(sdata,
4116 "failed to insert STA entry for the AP (error %d)\n",
4117 err);
a1cf775d
JB		 4118 return err;
4119 }
4120 } else
b203ca39 4121 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4122
4123 return 0;
4124}
4125
77fdaa12
JB		 4126/* config hooks */
4127int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4128 struct cfg80211_auth_request *req)
9c6bd790 4129{
66e67e41
JB		 4130 struct ieee80211_local *local = sdata->local;
4131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4132 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4133 u16 auth_alg;
66e67e41
JB		 4134 int err;
4135
4136 /* prepare auth data structure */
9c6bd790 4137
77fdaa12
JB		 4138 switch (req->auth_type) {
4139 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4140 auth_alg = WLAN_AUTH_OPEN;
4141 break;
4142 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4143 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4144 return -EOPNOTSUPP;
77fdaa12
JB		 4145 auth_alg = WLAN_AUTH_SHARED_KEY;
4146 break;
4147 case NL80211_AUTHTYPE_FT:
4148 auth_alg = WLAN_AUTH_FT;
4149 break;
4150 case NL80211_AUTHTYPE_NETWORK_EAP:
4151 auth_alg = WLAN_AUTH_LEAP;
4152 break;
6b8ece3a
JM		 4153 case NL80211_AUTHTYPE_SAE:
4154 auth_alg = WLAN_AUTH_SAE;
4155 break;
77fdaa12
JB		 4156 default:
4157 return -EOPNOTSUPP;
60f8b39c 4158 }
77fdaa12 4159
6b8ece3a
JM		 4160 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4161 req->ie_len, GFP_KERNEL);
66e67e41 4162 if (!auth_data)
9c6bd790 4163 return -ENOMEM;
77fdaa12 4164
66e67e41 4165 auth_data->bss = req->bss;
77fdaa12 4166
6b8ece3a
JM		 4167 if (req->sae_data_len >= 4) {
4168 __le16 *pos = (__le16 *) req->sae_data;
4169 auth_data->sae_trans = le16_to_cpu(pos[0]);
4170 auth_data->sae_status = le16_to_cpu(pos[1]);
4171 memcpy(auth_data->data, req->sae_data + 4,
4172 req->sae_data_len - 4);
4173 auth_data->data_len += req->sae_data_len - 4;
4174 }
4175
77fdaa12 4176 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4177 memcpy(&auth_data->data[auth_data->data_len],
4178 req->ie, req->ie_len);
4179 auth_data->data_len += req->ie_len;
9c6bd790 4180 }
77fdaa12 4181
fffd0934 4182 if (req->key && req->key_len) {
66e67e41
JB		 4183 auth_data->key_len = req->key_len;
4184 auth_data->key_idx = req->key_idx;
4185 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4186 }
4187
66e67e41 4188 auth_data->algorithm = auth_alg;
60f8b39c 4189
66e67e41 4190 /* try to authenticate/probe */
2a33bee2 4191
66e67e41 4192 mutex_lock(&ifmgd->mtx);
2a33bee2 4193
66e67e41
JB		 4194 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4195 ifmgd->assoc_data) {
4196 err = -EBUSY;
4197 goto err_free;
2a33bee2
GE		 4198 }
4199
66e67e41
JB		 4200 if (ifmgd->auth_data)
4201 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4202
66e67e41
JB		 4203 /* prep auth_data so we don't go into idle on disassoc */
4204 ifmgd->auth_data = auth_data;
af6b6374 4205
7b119dc0
JB		 4206 if (ifmgd->associated) {
4207 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4208
4209 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4210 WLAN_REASON_UNSPECIFIED,
4211 false, frame_buf);
4212
4213 __cfg80211_send_deauth(sdata->dev, frame_buf,
4214 sizeof(frame_buf));
4215 }
af6b6374 4216
bdcbd8e0 4217 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4218
a1cf775d
JB		 4219 err = ieee80211_prep_connection(sdata, req->bss, false);
4220 if (err)
66e67e41 4221 goto err_clear;
af6b6374 4222
66e67e41
JB		 4223 err = ieee80211_probe_auth(sdata);
4224 if (err) {
66e67e41
JB		 4225 sta_info_destroy_addr(sdata, req->bss->bssid);
4226 goto err_clear;
4227 }
4228
4229 /* hold our own reference */
5b112d3d 4230 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 4231 err = 0;
4232 goto out_unlock;
4233
4234 err_clear:
3d2abdfd
EP		 4235 memset(ifmgd->bssid, 0, ETH_ALEN);
4236 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4237 ifmgd->auth_data = NULL;
4238 err_free:
4239 kfree(auth_data);
4240 out_unlock:
4241 mutex_unlock(&ifmgd->mtx);
b2abb6e2 4242
66e67e41 4243 return err;
af6b6374
JB		 4244}
4245
77fdaa12
JB		 4246int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4247 struct cfg80211_assoc_request *req)
f0706e82 4248{
66e67e41 4249 struct ieee80211_local *local = sdata->local;
77fdaa12 4250 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4251 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4252 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4253 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4254 struct ieee80211_supported_band *sband;
b08fbbd8 4255 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4256 int i, err;
f0706e82 4257
66e67e41
JB		 4258 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4259 if (!assoc_data)
4260 return -ENOMEM;
4261
9caf0364
JB		 4262 rcu_read_lock();
4263 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4264 if (!ssidie) {
4265 rcu_read_unlock();
4266 kfree(assoc_data);
4267 return -EINVAL;
4268 }
4269 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4270 assoc_data->ssid_len = ssidie[1];
4271 rcu_read_unlock();
4272
77fdaa12 4273 mutex_lock(&ifmgd->mtx);
9c87ba67 4274
7b119dc0
JB		 4275 if (ifmgd->associated) {
4276 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4277
4278 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4279 WLAN_REASON_UNSPECIFIED,
4280 false, frame_buf);
4281
4282 __cfg80211_send_deauth(sdata->dev, frame_buf,
4283 sizeof(frame_buf));
4284 }
66e67e41
JB		 4285
4286 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4287 err = -EBUSY;
4288 goto err_free;
af6b6374 4289 }
77fdaa12 4290
66e67e41
JB		 4291 if (ifmgd->assoc_data) {
4292 err = -EBUSY;
4293 goto err_free;
4294 }
77fdaa12 4295
66e67e41
JB		 4296 if (ifmgd->auth_data) {
4297 bool match;
4298
4299 /* keep sta info, bssid if matching */
b203ca39 4300 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4301 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4302 }
4303
66e67e41 4304 /* prepare assoc data */
19c3b830 4305
d8ec4433
JO		 4306 ifmgd->beacon_crc_valid = false;
4307
de5036aa
JB		 4308 /*
4309 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4310 * We still associate in non-HT mode (11a/b/g) if any one of these
4311 * ciphers is configured as pairwise.
4312 * We can set this to true for non-11n hardware, that'll be checked
4313 * separately along with the peer capabilities.
4314 */
1c4cb928 4315 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4316 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4317 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4318 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4319 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4320 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4321 netdev_info(sdata->dev,
d545daba 4322 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4323 }
4324 }
77fdaa12 4325
d545daba 4326 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4327 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4328 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4329 }
ef96a842 4330
dd5ecfea
JB		 4331 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4332 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4333
4e74bfdb
JB		 4334 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4335 sband = local->hw.wiphy->bands[req->bss->channel->band];
4336 if (!sband->ht_cap.ht_supported ||
1c4cb928 4337 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4338 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4339 if (!bss->wmm_used)
4340 netdev_info(sdata->dev,
4341 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4342 }
4e74bfdb 4343
d545daba
MP		 4344 /* disable VHT if we don't support it or the AP doesn't use WMM */
4345 if (!sband->vht_cap.vht_supported ||
4346 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4348 if (!bss->wmm_used)
4349 netdev_info(sdata->dev,
4350 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4351 }
4352
ef96a842
BG		 4353 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4354 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4355 sizeof(ifmgd->ht_capa_mask));
4356
dd5ecfea
JB		 4357 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4358 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4359 sizeof(ifmgd->vht_capa_mask));
4360
77fdaa12 4361 if (req->ie && req->ie_len) {
66e67e41
JB		 4362 memcpy(assoc_data->ie, req->ie, req->ie_len);
4363 assoc_data->ie_len = req->ie_len;
4364 }
f679f65d 4365
66e67e41 4366 assoc_data->bss = req->bss;
f679f65d 4367
af6b6374
JB		 4368 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4369 if (ifmgd->powersave)
04ecd257 4370 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4371 else
04ecd257 4372 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4373 } else
04ecd257 4374 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4375
66e67e41 4376 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4377 assoc_data->wmm = bss->wmm_used &&
4378 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4379 assoc_data->supp_rates = bss->supp_rates;
4380 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4381
9caf0364 4382 rcu_read_lock();
9dde6423
JB		 4383 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4384 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4385 assoc_data->ap_ht_param =
4386 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4387 else
a8243b72 4388 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4389 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4390 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4391 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4392 sizeof(struct ieee80211_vht_cap));
4393 else
4394 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4395 rcu_read_unlock();
63f170e0 4396
ab13315a 4397 if (bss->wmm_used && bss->uapsd_supported &&
baa28fb6 4398 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4399 assoc_data->uapsd = true;
ab13315a
KV		 4400 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4401 } else {
76f0303d 4402 assoc_data->uapsd = false;
ab13315a
KV		 4403 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4404 }
4405
77fdaa12 4406 if (req->prev_bssid)
66e67e41 4407 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4408
4409 if (req->use_mfp) {
4410 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4411 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4412 } else {
4413 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4414 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4415 }
4416
4417 if (req->crypto.control_port)
4418 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4419 else
4420 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4421
a621fa4d
JB		 4422 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4423 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4424
66e67e41
JB		 4425 /* kick off associate process */
4426
4427 ifmgd->assoc_data = assoc_data;
826262c3 4428 ifmgd->dtim_period = 0;
66e67e41 4429
a1cf775d
JB		 4430 err = ieee80211_prep_connection(sdata, req->bss, true);
4431 if (err)
4432 goto err_clear;
66e67e41 4433
c65dd147
EG		 4434 rcu_read_lock();
4435 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4436
c65dd147
EG		 4437 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4438 !beacon_ies) {
4439 /*
4440 * Wait up to one beacon interval ...
4441 * should this be more if we miss one?
4442 */
4443 sdata_info(sdata, "waiting for beacon from %pM\n",
4444 ifmgd->bssid);
4445 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4446 assoc_data->timeout_started = true;
c65dd147
EG		 4447 assoc_data->need_beacon = true;
4448 } else if (beacon_ies) {
4449 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4450 beacon_ies->data,
4451 beacon_ies->len);
ef429dad
JB		 4452 u8 dtim_count = 0;
4453
c65dd147
EG		 4454 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4455 const struct ieee80211_tim_ie *tim;
4456 tim = (void *)(tim_ie + 2);
4457 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4458 dtim_count = tim->dtim_count;
826262c3 4459 }
66e67e41 4460 assoc_data->have_beacon = true;
66e67e41 4461 assoc_data->timeout = jiffies;
89afe614 4462 assoc_data->timeout_started = true;
ef429dad
JB		 4463
4464 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4465 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4466 sdata->vif.bss_conf.sync_device_ts =
4467 bss->device_ts_beacon;
4468 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4469 }
c65dd147
EG		 4470 } else {
4471 assoc_data->timeout = jiffies;
89afe614 4472 assoc_data->timeout_started = true;
66e67e41 4473 }
c65dd147
EG		 4474 rcu_read_unlock();
4475
66e67e41
JB		 4476 run_again(ifmgd, assoc_data->timeout);
4477
fcff4f10
PS		 4478 if (bss->corrupt_data) {
4479 char *corrupt_type = "data";
4480 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4481 if (bss->corrupt_data &
4482 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4483 corrupt_type = "beacon and probe response";
4484 else
4485 corrupt_type = "beacon";
4486 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4487 corrupt_type = "probe response";
bdcbd8e0
JB		 4488 sdata_info(sdata, "associating with AP with corrupt %s\n",
4489 corrupt_type);
fcff4f10
PS		 4490 }
4491
66e67e41
JB		 4492 err = 0;
4493 goto out;
4494 err_clear:
3d2abdfd
EP		 4495 memset(ifmgd->bssid, 0, ETH_ALEN);
4496 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4497 ifmgd->assoc_data = NULL;
4498 err_free:
4499 kfree(assoc_data);
4500 out:
4501 mutex_unlock(&ifmgd->mtx);
4502
4503 return err;
f0706e82
JB		 4504}
4505
77fdaa12 4506int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4507 struct cfg80211_deauth_request *req)
f0706e82 4508{
46900298 4509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4510 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4511 bool tx = !req->local_state_change;
de3d43a3 4512 bool report_frame = false;
f0706e82 4513
77fdaa12
JB		 4514 mutex_lock(&ifmgd->mtx);
4515
bdcbd8e0
JB		 4516 sdata_info(sdata,
4517 "deauthenticating from %pM by local choice (reason=%d)\n",
4518 req->bssid, req->reason_code);
0ff71613 4519
86552017 4520 if (ifmgd->auth_data) {
8c7d857c 4521 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4522 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4523 IEEE80211_STYPE_DEAUTH,
6863255b 4524 req->reason_code, tx,
37ad3888 4525 frame_buf);
86552017
JB		 4526 ieee80211_destroy_auth_data(sdata, false);
4527 mutex_unlock(&ifmgd->mtx);
4528
de3d43a3 4529 report_frame = true;
86552017 4530 goto out;
8c7d857c
EG		 4531 }
4532
86552017
JB		 4533 if (ifmgd->associated &&
4534 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4535 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4536 req->reason_code, tx, frame_buf);
de3d43a3 4537 report_frame = true;
86552017 4538 }
37ad3888
JB		 4539 mutex_unlock(&ifmgd->mtx);
4540
86552017 4541 out:
de3d43a3 4542 if (report_frame)
86552017
JB		 4543 __cfg80211_send_deauth(sdata->dev, frame_buf,
4544 IEEE80211_DEAUTH_FRAME_LEN);
4545
f0706e82
JB		 4546 return 0;
4547}
84363e6e 4548
77fdaa12 4549int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4550 struct cfg80211_disassoc_request *req)
9c6bd790 4551{
77fdaa12 4552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4553 u8 bssid[ETH_ALEN];
6ae16775 4554 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4555
77fdaa12 4556 mutex_lock(&ifmgd->mtx);
10f644a4 4557
8d8b261a
JB		 4558 /*
4559 * cfg80211 should catch this ... but it's racy since
4560 * we can receive a disassoc frame, process it, hand it
4561 * to cfg80211 while that's in a locked section already
4562 * trying to tell us that the user wants to disconnect.
4563 */
0c1ad2ca 4564 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4565 mutex_unlock(&ifmgd->mtx);
4566 return -ENOLINK;
4567 }
4568
bdcbd8e0
JB		 4569 sdata_info(sdata,
4570 "disassociating from %pM by local choice (reason=%d)\n",
4571 req->bss->bssid, req->reason_code);
0ff71613 4572
e69e95db 4573 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4575 req->reason_code, !req->local_state_change,
4576 frame_buf);
77fdaa12 4577 mutex_unlock(&ifmgd->mtx);
10f644a4 4578
6ae16775
AQ		 4579 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4580 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4581
10f644a4
JB		 4582 return 0;
4583}
026331c4 4584
afa762f6 4585void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4586{
4587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4588
49921859
BG		 4589 /*
4590 * Make sure some work items will not run after this,
4591 * they will not do anything but might not have been
4592 * cancelled when disconnecting.
4593 */
4594 cancel_work_sync(&ifmgd->monitor_work);
4595 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4596 cancel_work_sync(&ifmgd->request_smps_work);
4597 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4598 cancel_work_sync(&ifmgd->chswitch_work);
4599
54e4ffb2
JB		 4600 mutex_lock(&ifmgd->mtx);
4601 if (ifmgd->assoc_data)
4602 ieee80211_destroy_assoc_data(sdata, false);
4603 if (ifmgd->auth_data)
4604 ieee80211_destroy_auth_data(sdata, false);
4605 del_timer_sync(&ifmgd->timer);
4606 mutex_unlock(&ifmgd->mtx);
4607}
4608
a97c13c3
JO		 4609void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4610 enum nl80211_cqm_rssi_threshold_event rssi_event,
4611 gfp_t gfp)
4612{
4613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4614
b5878a2d
JB		 4615 trace_api_cqm_rssi_notify(sdata, rssi_event);
4616
a97c13c3
JO		 4617 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4618}
4619EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
kernel source for telekom puls (alcatel/mediatek)