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mac80211: allow drivers to access IPv6 information
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
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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
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
77fdaa12
JB		 91/*
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
96 */
97enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
77fdaa12
JB		 101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
103
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 106
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
109
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
112
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 115};
116
5484e237 117/* utils */
77fdaa12
JB		 118static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119{
46a5ebaf 120 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 121}
122
ca386f31
JB		 123/*
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
131 * do that.
132 */
66e67e41 133static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 134{
135 ASSERT_MGD_MTX(ifmgd);
136
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
140}
141
d3a910a8 142void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 143{
c1288b12 144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 145 return;
146
7eeff74c
JB		 147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
b291ba11 150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 152}
153
be099e82
LR		 154void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155{
0c699c3a
LR		 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
8628172f
SG		 158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
be099e82
LR		 161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
162 return;
163
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 166
167 ifmgd->probe_send_count = 0;
be099e82
LR		 168}
169
5484e237 170static int ecw2cw(int ecw)
60f8b39c 171{
5484e237 172 return (1 << ecw) - 1;
60f8b39c
JB		 173}
174
24398e39
JB		 175static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
d5522e03
JB		 178{
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
55de908a
JB		 181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
d5522e03
JB		 183 struct sta_info *sta;
184 u32 changed = 0;
9ed6bcce 185 u16 ht_opmode;
64f68e5d 186 bool disable_40 = false;
d5522e03 187
55de908a
JB		 188 rcu_read_lock();
189 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
190 if (WARN_ON(!chanctx_conf)) {
191 rcu_read_unlock();
192 return 0;
193 }
4bf88530 194 chan = chanctx_conf->def.chan;
55de908a
JB		 195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
d5522e03 197
4bf88530
JB		 198 switch (sdata->vif.bss_conf.chandef.width) {
199 case NL80211_CHAN_WIDTH_40:
200 if (sdata->vif.bss_conf.chandef.chan->center_freq >
201 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 202 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d 203 disable_40 = true;
4bf88530
JB		 204 if (sdata->vif.bss_conf.chandef.chan->center_freq <
205 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 206 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 207 disable_40 = true;
208 break;
209 default:
210 break;
211 }
d5522e03 212
24398e39
JB		 213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 215 disable_40 = true;
216
217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
d5522e03 219
64f68e5d
JB		 220 WARN_ON_ONCE(!sta);
221
222 if (sta && !sta->supports_40mhz)
223 disable_40 = true;
224
225 if (sta && (!reconfig ||
91a0099c 226 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 228
64f68e5d
JB		 229 if (disable_40)
230 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
231 else
232 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 233
64f68e5d 234 rate_control_rate_update(local, sband, sta,
8f727ef3 235 IEEE80211_RC_BW_CHANGED);
0aaffa9b 236 }
64f68e5d 237 mutex_unlock(&local->sta_mtx);
d5522e03 238
074d46d1 239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 240
241 /* if bss configuration changed store the new one */
24398e39 242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 243 changed |= BSS_CHANGED_HT;
9ed6bcce 244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 245 }
246
247 return changed;
248}
249
9c6bd790
JB		 250/* frame sending functions */
251
66e67e41
JB		 252static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
253 struct ieee80211_supported_band *sband,
254 u32 *rates)
255{
256 int i, j, count;
257 *rates = 0;
258 count = 0;
259 for (i = 0; i < supp_rates_len; i++) {
260 int rate = (supp_rates[i] & 0x7F) * 5;
261
262 for (j = 0; j < sband->n_bitrates; j++)
263 if (sband->bitrates[j].bitrate == rate) {
264 *rates |= BIT(j);
265 count++;
266 break;
267 }
268 }
269
270 return count;
271}
272
273static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 274 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
278{
66e67e41
JB		 279 u8 *pos;
280 u32 flags = channel->flags;
281 u16 cap;
282 struct ieee80211_sta_ht_cap ht_cap;
283
284 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
285
66e67e41
JB		 286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
288
66e67e41
JB		 289 /* determine capability flags */
290 cap = ht_cap.cap;
291
9dde6423 292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
294 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
295 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
296 cap &= ~IEEE80211_HT_CAP_SGI_40;
297 }
298 break;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
300 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
303 }
304 break;
305 }
306
24398e39
JB		 307 /*
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
311 */
312 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
313 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
314 cap &= ~IEEE80211_HT_CAP_SGI_40;
315 }
316
66e67e41
JB		 317 /* set SM PS mode properly */
318 cap &= ~IEEE80211_HT_CAP_SM_PS;
319 switch (smps) {
320 case IEEE80211_SMPS_AUTOMATIC:
321 case IEEE80211_SMPS_NUM_MODES:
322 WARN_ON(1);
323 case IEEE80211_SMPS_OFF:
324 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_STATIC:
328 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 case IEEE80211_SMPS_DYNAMIC:
332 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
333 IEEE80211_HT_CAP_SM_PS_SHIFT;
334 break;
335 }
336
337 /* reserve and fill IE */
338 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
339 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
340}
341
d545daba
MP		 342static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
343 struct sk_buff *skb,
b08fbbd8
JB		 344 struct ieee80211_supported_band *sband,
345 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 346{
347 u8 *pos;
348 u32 cap;
349 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 350 int i;
d545daba
MP		 351
352 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
353
354 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
355
356 /* determine capability flags */
357 cap = vht_cap.cap;
358
f2d9d270
JB		 359 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
360 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
361 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
362 }
363
364 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
365 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
366 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
367 }
368
b08fbbd8
JB		 369 /*
370 * Some APs apparently get confused if our capabilities are better
371 * than theirs, so restrict what we advertise in the assoc request.
372 */
373 if (!(ap_vht_cap->vht_cap_info &
374 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
375 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
376
377 if (!(ap_vht_cap->vht_cap_info &
378 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
379 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
380 IEEE80211_VHT_CAP_RXSTBC_3 |
381 IEEE80211_VHT_CAP_RXSTBC_4);
382
383 for (i = 0; i < 8; i++) {
384 int shift = i * 2;
385 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
386 u16 ap_mcs, our_mcs;
387
388 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
389 mask) >> shift;
390 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
391 mask) >> shift;
392
393 switch (ap_mcs) {
394 default:
395 if (our_mcs <= ap_mcs)
396 break;
397 /* fall through */
398 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
399 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
400 vht_cap.vht_mcs.rx_mcs_map |=
401 cpu_to_le16(ap_mcs << shift);
402 }
403 }
404
d545daba 405 /* reserve and fill IE */
d4950281 406 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 407 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
408}
409
66e67e41
JB		 410static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
411{
412 struct ieee80211_local *local = sdata->local;
413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
414 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
415 struct sk_buff *skb;
416 struct ieee80211_mgmt *mgmt;
417 u8 *pos, qos_info;
418 size_t offset = 0, noffset;
419 int i, count, rates_len, supp_rates_len;
420 u16 capab;
421 struct ieee80211_supported_band *sband;
55de908a
JB		 422 struct ieee80211_chanctx_conf *chanctx_conf;
423 struct ieee80211_channel *chan;
66e67e41 424 u32 rates = 0;
66e67e41
JB		 425
426 lockdep_assert_held(&ifmgd->mtx);
427
55de908a
JB		 428 rcu_read_lock();
429 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
430 if (WARN_ON(!chanctx_conf)) {
431 rcu_read_unlock();
432 return;
433 }
4bf88530 434 chan = chanctx_conf->def.chan;
55de908a
JB		 435 rcu_read_unlock();
436 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 437
438 if (assoc_data->supp_rates_len) {
439 /*
440 * Get all rates supported by the device and the AP as
441 * some APs don't like getting a superset of their rates
442 * in the association request (e.g. D-Link DAP 1353 in
443 * b-only mode)...
444 */
445 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
446 assoc_data->supp_rates_len,
447 sband, &rates);
448 } else {
449 /*
450 * In case AP not provide any supported rates information
451 * before association, we send information element(s) with
452 * all rates that we support.
453 */
454 rates = ~0;
455 rates_len = sband->n_bitrates;
456 }
457
458 skb = alloc_skb(local->hw.extra_tx_headroom +
459 sizeof(*mgmt) + /* bit too much but doesn't matter */
460 2 + assoc_data->ssid_len + /* SSID */
461 4 + rates_len + /* (extended) rates */
462 4 + /* power capability */
463 2 + 2 * sband->n_channels + /* supported channels */
464 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 465 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 466 assoc_data->ie_len + /* extra IEs */
467 9, /* WMM */
468 GFP_KERNEL);
469 if (!skb)
470 return;
471
472 skb_reserve(skb, local->hw.extra_tx_headroom);
473
474 capab = WLAN_CAPABILITY_ESS;
475
476 if (sband->band == IEEE80211_BAND_2GHZ) {
477 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
478 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
479 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
480 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
481 }
482
483 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
484 capab |= WLAN_CAPABILITY_PRIVACY;
485
486 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
487 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
488 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
489
490 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
491 memset(mgmt, 0, 24);
492 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
493 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
494 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
495
496 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
497 skb_put(skb, 10);
498 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
499 IEEE80211_STYPE_REASSOC_REQ);
500 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
501 mgmt->u.reassoc_req.listen_interval =
502 cpu_to_le16(local->hw.conf.listen_interval);
503 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
504 ETH_ALEN);
505 } else {
506 skb_put(skb, 4);
507 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
508 IEEE80211_STYPE_ASSOC_REQ);
509 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
510 mgmt->u.assoc_req.listen_interval =
511 cpu_to_le16(local->hw.conf.listen_interval);
512 }
513
514 /* SSID */
515 pos = skb_put(skb, 2 + assoc_data->ssid_len);
516 *pos++ = WLAN_EID_SSID;
517 *pos++ = assoc_data->ssid_len;
518 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
519
520 /* add all rates which were marked to be used above */
521 supp_rates_len = rates_len;
522 if (supp_rates_len > 8)
523 supp_rates_len = 8;
524
525 pos = skb_put(skb, supp_rates_len + 2);
526 *pos++ = WLAN_EID_SUPP_RATES;
527 *pos++ = supp_rates_len;
528
529 count = 0;
530 for (i = 0; i < sband->n_bitrates; i++) {
531 if (BIT(i) & rates) {
532 int rate = sband->bitrates[i].bitrate;
533 *pos++ = (u8) (rate / 5);
534 if (++count == 8)
535 break;
536 }
537 }
538
539 if (rates_len > count) {
540 pos = skb_put(skb, rates_len - count + 2);
541 *pos++ = WLAN_EID_EXT_SUPP_RATES;
542 *pos++ = rates_len - count;
543
544 for (i++; i < sband->n_bitrates; i++) {
545 if (BIT(i) & rates) {
546 int rate = sband->bitrates[i].bitrate;
547 *pos++ = (u8) (rate / 5);
548 }
549 }
550 }
551
552 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
553 /* 1. power capabilities */
554 pos = skb_put(skb, 4);
555 *pos++ = WLAN_EID_PWR_CAPABILITY;
556 *pos++ = 2;
557 *pos++ = 0; /* min tx power */
55de908a 558 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 559
560 /* 2. supported channels */
561 /* TODO: get this in reg domain format */
562 pos = skb_put(skb, 2 * sband->n_channels + 2);
563 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
564 *pos++ = 2 * sband->n_channels;
565 for (i = 0; i < sband->n_channels; i++) {
566 *pos++ = ieee80211_frequency_to_channel(
567 sband->channels[i].center_freq);
568 *pos++ = 1; /* one channel in the subband*/
569 }
570 }
571
572 /* if present, add any custom IEs that go before HT */
573 if (assoc_data->ie_len && assoc_data->ie) {
574 static const u8 before_ht[] = {
575 WLAN_EID_SSID,
576 WLAN_EID_SUPP_RATES,
577 WLAN_EID_EXT_SUPP_RATES,
578 WLAN_EID_PWR_CAPABILITY,
579 WLAN_EID_SUPPORTED_CHANNELS,
580 WLAN_EID_RSN,
581 WLAN_EID_QOS_CAPA,
582 WLAN_EID_RRM_ENABLED_CAPABILITIES,
583 WLAN_EID_MOBILITY_DOMAIN,
584 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
585 };
586 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
587 before_ht, ARRAY_SIZE(before_ht),
588 offset);
589 pos = skb_put(skb, noffset - offset);
590 memcpy(pos, assoc_data->ie + offset, noffset - offset);
591 offset = noffset;
592 }
593
f2d9d270
JB		 594 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
595 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
596 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
597
a8243b72 598 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 599 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 600 sband, chan, sdata->smps_mode);
66e67e41 601
d545daba 602 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 603 ieee80211_add_vht_ie(sdata, skb, sband,
604 &assoc_data->ap_vht_cap);
d545daba 605
66e67e41
JB		 606 /* if present, add any custom non-vendor IEs that go after HT */
607 if (assoc_data->ie_len && assoc_data->ie) {
608 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
609 assoc_data->ie_len,
610 offset);
611 pos = skb_put(skb, noffset - offset);
612 memcpy(pos, assoc_data->ie + offset, noffset - offset);
613 offset = noffset;
614 }
615
76f0303d
JB		 616 if (assoc_data->wmm) {
617 if (assoc_data->uapsd) {
dc41e4d4
EP		 618 qos_info = ifmgd->uapsd_queues;
619 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 620 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
621 } else {
622 qos_info = 0;
623 }
624
625 pos = skb_put(skb, 9);
626 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
627 *pos++ = 7; /* len */
628 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
629 *pos++ = 0x50;
630 *pos++ = 0xf2;
631 *pos++ = 2; /* WME */
632 *pos++ = 0; /* WME info */
633 *pos++ = 1; /* WME ver */
634 *pos++ = qos_info;
635 }
636
637 /* add any remaining custom (i.e. vendor specific here) IEs */
638 if (assoc_data->ie_len && assoc_data->ie) {
639 noffset = assoc_data->ie_len;
640 pos = skb_put(skb, noffset - offset);
641 memcpy(pos, assoc_data->ie + offset, noffset - offset);
642 }
643
a1845fc7
JB		 644 drv_mgd_prepare_tx(local, sdata);
645
66e67e41
JB		 646 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
647 ieee80211_tx_skb(sdata, skb);
648}
649
572e0012
KV		 650void ieee80211_send_pspoll(struct ieee80211_local *local,
651 struct ieee80211_sub_if_data *sdata)
652{
572e0012
KV		 653 struct ieee80211_pspoll *pspoll;
654 struct sk_buff *skb;
572e0012 655
d8cd189e
KV		 656 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
657 if (!skb)
572e0012 658 return;
572e0012 659
d8cd189e
KV		 660 pspoll = (struct ieee80211_pspoll *) skb->data;
661 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 662
62ae67be
JB		 663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 665}
666
965bedad
JB		 667void ieee80211_send_nullfunc(struct ieee80211_local *local,
668 struct ieee80211_sub_if_data *sdata,
669 int powersave)
670{
671 struct sk_buff *skb;
d8cd189e 672 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 674
d8cd189e
KV		 675 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
676 if (!skb)
965bedad 677 return;
965bedad 678
d8cd189e 679 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 680 if (powersave)
d8cd189e 681 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 682
62ae67be 683 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 684 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
685 IEEE80211_STA_CONNECTION_POLL))
686 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
687
62ae67be 688 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 689}
690
d524215f
FF		 691static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
692 struct ieee80211_sub_if_data *sdata)
693{
694 struct sk_buff *skb;
695 struct ieee80211_hdr *nullfunc;
696 __le16 fc;
697
698 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
699 return;
700
701 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 702 if (!skb)
d524215f 703 return;
d15b8459 704
d524215f
FF		 705 skb_reserve(skb, local->hw.extra_tx_headroom);
706
707 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
708 memset(nullfunc, 0, 30);
709 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
710 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
711 nullfunc->frame_control = fc;
712 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
713 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
714 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
715 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
716
717 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
718 ieee80211_tx_skb(sdata, skb);
719}
720
cc32abd4
JB		 721/* spectrum management related things */
722static void ieee80211_chswitch_work(struct work_struct *work)
723{
724 struct ieee80211_sub_if_data *sdata =
725 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
727
9607e6b6 728 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 729 return;
730
77fdaa12
JB		 731 mutex_lock(&ifmgd->mtx);
732 if (!ifmgd->associated)
733 goto out;
cc32abd4 734
55de908a 735 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 736 if (!sdata->local->ops->channel_switch) {
737 /* call "hw_config" only if doing sw channel switch */
738 ieee80211_hw_config(sdata->local,
739 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 740 } else {
741 /* update the device channel directly */
55de908a 742 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 743 }
77fdaa12 744
cc32abd4 745 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 746 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 747
57eebdf3 748 /* XXX: wait for a beacon first? */
cc32abd4
JB		 749 ieee80211_wake_queues_by_reason(&sdata->local->hw,
750 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 751 out:
752 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
753 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 754}
755
5ce6e438
JB		 756void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
757{
55de908a
JB		 758 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 760
761 trace_api_chswitch_done(sdata, success);
762 if (!success) {
882a7c69
JB		 763 sdata_info(sdata,
764 "driver channel switch failed, disconnecting\n");
765 ieee80211_queue_work(&sdata->local->hw,
766 &ifmgd->csa_connection_drop_work);
767 } else {
768 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 769 }
5ce6e438
JB		 770}
771EXPORT_SYMBOL(ieee80211_chswitch_done);
772
cc32abd4
JB		 773static void ieee80211_chswitch_timer(unsigned long data)
774{
775 struct ieee80211_sub_if_data *sdata =
776 (struct ieee80211_sub_if_data *) data;
777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
778
5bb644a0
JB		 779 if (sdata->local->quiescing) {
780 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
781 return;
782 }
783
42935eca 784 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 785}
786
787void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
788 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 789 struct ieee80211_bss *bss,
790 u64 timestamp)
cc32abd4 791{
0c1ad2ca
JB		 792 struct cfg80211_bss *cbss =
793 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 794 struct ieee80211_channel *new_ch;
795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 796 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
797 cbss->channel->band);
55de908a 798 struct ieee80211_chanctx *chanctx;
cc32abd4 799
77fdaa12
JB		 800 ASSERT_MGD_MTX(ifmgd);
801
802 if (!ifmgd->associated)
cc32abd4
JB		 803 return;
804
fbe9c429 805 if (sdata->local->scanning)
cc32abd4
JB		 806 return;
807
808 /* Disregard subsequent beacons if we are already running a timer
809 processing a CSA */
810
811 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
812 return;
813
814 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 815 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
816 sdata_info(sdata,
817 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
818 ifmgd->associated->bssid, new_freq);
819 ieee80211_queue_work(&sdata->local->hw,
820 &ifmgd->csa_connection_drop_work);
cc32abd4 821 return;
882a7c69 822 }
cc32abd4 823
57eebdf3
JB		 824 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
825
55de908a
JB		 826 if (sdata->local->use_chanctx) {
827 sdata_info(sdata,
828 "not handling channel switch with channel contexts\n");
829 ieee80211_queue_work(&sdata->local->hw,
830 &ifmgd->csa_connection_drop_work);
246dc3fd 831 return;
55de908a
JB		 832 }
833
834 mutex_lock(&sdata->local->chanctx_mtx);
835 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
836 mutex_unlock(&sdata->local->chanctx_mtx);
837 return;
838 }
839 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
840 struct ieee80211_chanctx, conf);
841 if (chanctx->refcount > 1) {
842 sdata_info(sdata,
843 "channel switch with multiple interfaces on the same channel, disconnecting\n");
844 ieee80211_queue_work(&sdata->local->hw,
845 &ifmgd->csa_connection_drop_work);
846 mutex_unlock(&sdata->local->chanctx_mtx);
847 return;
848 }
849 mutex_unlock(&sdata->local->chanctx_mtx);
850
851 sdata->local->csa_channel = new_ch;
852
57eebdf3
JB		 853 if (sw_elem->mode)
854 ieee80211_stop_queues_by_reason(&sdata->local->hw,
855 IEEE80211_QUEUE_STOP_REASON_CSA);
856
5ce6e438
JB		 857 if (sdata->local->ops->channel_switch) {
858 /* use driver's channel switch callback */
57eebdf3
JB		 859 struct ieee80211_channel_switch ch_switch = {
860 .timestamp = timestamp,
861 .block_tx = sw_elem->mode,
862 .channel = new_ch,
863 .count = sw_elem->count,
864 };
865
5ce6e438
JB		 866 drv_channel_switch(sdata->local, &ch_switch);
867 return;
868 }
869
870 /* channel switch handled in software */
57eebdf3 871 if (sw_elem->count <= 1)
42935eca 872 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 873 else
cc32abd4 874 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 875 TU_TO_EXP_TIME(sw_elem->count *
876 cbss->beacon_interval));
cc32abd4
JB		 877}
878
1ea6f9c0
JB		 879static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
880 struct ieee80211_channel *channel,
881 const u8 *country_ie, u8 country_ie_len,
882 const u8 *pwr_constr_elem)
cc32abd4 883{
04b7b2ff
JB		 884 struct ieee80211_country_ie_triplet *triplet;
885 int chan = ieee80211_frequency_to_channel(channel->center_freq);
886 int i, chan_pwr, chan_increment, new_ap_level;
887 bool have_chan_pwr = false;
cc32abd4 888
04b7b2ff
JB		 889 /* Invalid IE */
890 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 891 return 0;
cc32abd4 892
04b7b2ff
JB		 893 triplet = (void *)(country_ie + 3);
894 country_ie_len -= 3;
895
896 switch (channel->band) {
897 default:
898 WARN_ON_ONCE(1);
899 /* fall through */
900 case IEEE80211_BAND_2GHZ:
901 case IEEE80211_BAND_60GHZ:
902 chan_increment = 1;
903 break;
904 case IEEE80211_BAND_5GHZ:
905 chan_increment = 4;
906 break;
cc32abd4 907 }
04b7b2ff
JB		 908
909 /* find channel */
910 while (country_ie_len >= 3) {
911 u8 first_channel = triplet->chans.first_channel;
912
913 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
914 goto next;
915
916 for (i = 0; i < triplet->chans.num_channels; i++) {
917 if (first_channel + i * chan_increment == chan) {
918 have_chan_pwr = true;
919 chan_pwr = triplet->chans.max_power;
920 break;
921 }
922 }
923 if (have_chan_pwr)
924 break;
925
926 next:
927 triplet++;
928 country_ie_len -= 3;
929 }
930
931 if (!have_chan_pwr)
1ea6f9c0 932 return 0;
04b7b2ff
JB		 933
934 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
935
1ea6f9c0
JB		 936 if (sdata->ap_power_level == new_ap_level)
937 return 0;
04b7b2ff
JB		 938
939 sdata_info(sdata,
940 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
941 new_ap_level, chan_pwr, *pwr_constr_elem,
942 sdata->u.mgd.bssid);
1ea6f9c0
JB		 943 sdata->ap_power_level = new_ap_level;
944 if (__ieee80211_recalc_txpower(sdata))
945 return BSS_CHANGED_TXPOWER;
946 return 0;
cc32abd4
JB		 947}
948
f90754c1
JO		 949void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
950{
951 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
952 struct ieee80211_local *local = sdata->local;
953 struct ieee80211_conf *conf = &local->hw.conf;
954
955 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
956 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
957 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
958
959 local->disable_dynamic_ps = false;
960 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
961}
962EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
963
964void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
965{
966 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
967 struct ieee80211_local *local = sdata->local;
968 struct ieee80211_conf *conf = &local->hw.conf;
969
970 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
971 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
972 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
973
974 local->disable_dynamic_ps = true;
975 conf->dynamic_ps_timeout = 0;
976 del_timer_sync(&local->dynamic_ps_timer);
977 ieee80211_queue_work(&local->hw,
978 &local->dynamic_ps_enable_work);
979}
980EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
981
965bedad
JB		 982/* powersave */
983static void ieee80211_enable_ps(struct ieee80211_local *local,
984 struct ieee80211_sub_if_data *sdata)
985{
986 struct ieee80211_conf *conf = &local->hw.conf;
987
d5edaedc
JB		 988 /*
989 * If we are scanning right now then the parameters will
990 * take effect when scan finishes.
991 */
fbe9c429 992 if (local->scanning)
d5edaedc
JB		 993 return;
994
965bedad
JB		 995 if (conf->dynamic_ps_timeout > 0 &&
996 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
997 mod_timer(&local->dynamic_ps_timer, jiffies +
998 msecs_to_jiffies(conf->dynamic_ps_timeout));
999 } else {
1000 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1001 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1002
2a13052f
JO		 1003 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1004 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1005 return;
1006
1007 conf->flags |= IEEE80211_CONF_PS;
1008 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1009 }
1010}
1011
1012static void ieee80211_change_ps(struct ieee80211_local *local)
1013{
1014 struct ieee80211_conf *conf = &local->hw.conf;
1015
1016 if (local->ps_sdata) {
965bedad
JB		 1017 ieee80211_enable_ps(local, local->ps_sdata);
1018 } else if (conf->flags & IEEE80211_CONF_PS) {
1019 conf->flags &= ~IEEE80211_CONF_PS;
1020 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1021 del_timer_sync(&local->dynamic_ps_timer);
1022 cancel_work_sync(&local->dynamic_ps_enable_work);
1023 }
1024}
1025
808118cb
JY		 1026static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1027{
1028 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1029 struct sta_info *sta = NULL;
c2c98fde 1030 bool authorized = false;
808118cb
JY		 1031
1032 if (!mgd->powersave)
1033 return false;
1034
05cb9108
JB		 1035 if (mgd->broken_ap)
1036 return false;
1037
808118cb
JY		 1038 if (!mgd->associated)
1039 return false;
1040
808118cb
JY		 1041 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1042 IEEE80211_STA_CONNECTION_POLL))
1043 return false;
1044
1045 rcu_read_lock();
1046 sta = sta_info_get(sdata, mgd->bssid);
1047 if (sta)
c2c98fde 1048 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1049 rcu_read_unlock();
1050
c2c98fde 1051 return authorized;
808118cb
JY		 1052}
1053
965bedad 1054/* need to hold RTNL or interface lock */
10f644a4 1055void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1056{
1057 struct ieee80211_sub_if_data *sdata, *found = NULL;
1058 int count = 0;
195e294d 1059 int timeout;
965bedad
JB		 1060
1061 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1062 local->ps_sdata = NULL;
1063 return;
1064 }
1065
1066 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1067 if (!ieee80211_sdata_running(sdata))
965bedad 1068 continue;
8c7914de
RM		 1069 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1070 /* If an AP vif is found, then disable PS
1071 * by setting the count to zero thereby setting
1072 * ps_sdata to NULL.
1073 */
1074 count = 0;
1075 break;
1076 }
965bedad
JB		 1077 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1078 continue;
1079 found = sdata;
1080 count++;
1081 }
1082
808118cb 1083 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1084 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1085 s32 beaconint_us;
1086
1087 if (latency < 0)
ed77134b 1088 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1089
1090 beaconint_us = ieee80211_tu_to_usec(
1091 found->vif.bss_conf.beacon_int);
1092
ff616381 1093 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1094 if (timeout < 0) {
1095 /*
ff616381
JO		 1096 * Go to full PSM if the user configures a very low
1097 * latency requirement.
0ab82b04
EP		 1098 * The 2000 second value is there for compatibility
1099 * until the PM_QOS_NETWORK_LATENCY is configured
1100 * with real values.
195e294d 1101 */
0ab82b04
EP		 1102 if (latency > (1900 * USEC_PER_MSEC) &&
1103 latency != (2000 * USEC_PER_SEC))
195e294d 1104 timeout = 0;
ff616381
JO		 1105 else
1106 timeout = 100;
195e294d 1107 }
f90754c1
JO		 1108 local->dynamic_ps_user_timeout = timeout;
1109 if (!local->disable_dynamic_ps)
1110 conf->dynamic_ps_timeout =
1111 local->dynamic_ps_user_timeout;
195e294d 1112
04fe2037 1113 if (beaconint_us > latency) {
10f644a4 1114 local->ps_sdata = NULL;
04fe2037 1115 } else {
04fe2037 1116 int maxslp = 1;
826262c3 1117 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1118
1119 /* If the TIM IE is invalid, pretend the value is 1 */
1120 if (!dtimper)
1121 dtimper = 1;
1122 else if (dtimper > 1)
04fe2037
JB		 1123 maxslp = min_t(int, dtimper,
1124 latency / beaconint_us);
1125
9ccebe61 1126 local->hw.conf.max_sleep_period = maxslp;
56007a02 1127 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1128 local->ps_sdata = found;
04fe2037 1129 }
10f644a4 1130 } else {
965bedad 1131 local->ps_sdata = NULL;
10f644a4 1132 }
965bedad
JB		 1133
1134 ieee80211_change_ps(local);
1135}
1136
ab095877
EP		 1137void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1138{
1139 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1140
1141 if (sdata->vif.bss_conf.ps != ps_allowed) {
1142 sdata->vif.bss_conf.ps = ps_allowed;
1143 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1144 }
1145}
1146
965bedad
JB		 1147void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1148{
1149 struct ieee80211_local *local =
1150 container_of(work, struct ieee80211_local,
1151 dynamic_ps_disable_work);
1152
1153 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1154 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1155 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1156 }
1157
1158 ieee80211_wake_queues_by_reason(&local->hw,
1159 IEEE80211_QUEUE_STOP_REASON_PS);
1160}
1161
1162void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1163{
1164 struct ieee80211_local *local =
1165 container_of(work, struct ieee80211_local,
1166 dynamic_ps_enable_work);
1167 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1168 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1169 unsigned long flags;
1170 int q;
965bedad
JB		 1171
1172 /* can only happen when PS was just disabled anyway */
1173 if (!sdata)
1174 return;
1175
5e34069c
CL		 1176 ifmgd = &sdata->u.mgd;
1177
965bedad
JB		 1178 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1179 return;
1180
77b7023a
AN		 1181 if (!local->disable_dynamic_ps &&
1182 local->hw.conf.dynamic_ps_timeout > 0) {
1183 /* don't enter PS if TX frames are pending */
1184 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1185 mod_timer(&local->dynamic_ps_timer, jiffies +
1186 msecs_to_jiffies(
1187 local->hw.conf.dynamic_ps_timeout));
1188 return;
1189 }
77b7023a
AN		 1190
1191 /*
1192 * transmission can be stopped by others which leads to
1193 * dynamic_ps_timer expiry. Postpone the ps timer if it
1194 * is not the actual idle state.
1195 */
1196 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1197 for (q = 0; q < local->hw.queues; q++) {
1198 if (local->queue_stop_reasons[q]) {
1199 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1200 flags);
1201 mod_timer(&local->dynamic_ps_timer, jiffies +
1202 msecs_to_jiffies(
1203 local->hw.conf.dynamic_ps_timeout));
1204 return;
1205 }
1206 }
1207 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1208 }
1ddc2867 1209
375177bf 1210 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1211 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1212 netif_tx_stop_all_queues(sdata->dev);
965bedad 1213
e8306f98
VN		 1214 if (drv_tx_frames_pending(local))
1215 mod_timer(&local->dynamic_ps_timer, jiffies +
1216 msecs_to_jiffies(
1217 local->hw.conf.dynamic_ps_timeout));
1218 else {
1219 ieee80211_send_nullfunc(local, sdata, 1);
1220 /* Flush to get the tx status of nullfunc frame */
1221 drv_flush(local, false);
1222 }
f3e85b9e
VN		 1223 }
1224
2a13052f
JO		 1225 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1226 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1227 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1228 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1229 local->hw.conf.flags |= IEEE80211_CONF_PS;
1230 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1231 }
f3e85b9e 1232
77b7023a
AN		 1233 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1234 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1235}
1236
1237void ieee80211_dynamic_ps_timer(unsigned long data)
1238{
1239 struct ieee80211_local *local = (void *) data;
1240
78f1a8b7 1241 if (local->quiescing || local->suspended)
5bb644a0
JB		 1242 return;
1243
42935eca 1244 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1245}
1246
60f8b39c 1247/* MLME */
7d25745d 1248static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1249 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1250 u8 *wmm_param, size_t wmm_param_len)
1251{
f0706e82 1252 struct ieee80211_tx_queue_params params;
4ced3f74 1253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1254 size_t left;
1255 int count;
ab13315a 1256 u8 *pos, uapsd_queues = 0;
f0706e82 1257
e1b3ec1a 1258 if (!local->ops->conf_tx)
7d25745d 1259 return false;
e1b3ec1a 1260
32c5057b 1261 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1262 return false;
3434fbd3
JB		 1263
1264 if (!wmm_param)
7d25745d 1265 return false;
3434fbd3 1266
f0706e82 1267 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1268 return false;
ab13315a
KV		 1269
1270 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1271 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1272
f0706e82 1273 count = wmm_param[6] & 0x0f;
46900298 1274 if (count == ifmgd->wmm_last_param_set)
7d25745d 1275 return false;
46900298 1276 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1277
1278 pos = wmm_param + 8;
1279 left = wmm_param_len - 8;
1280
1281 memset(&params, 0, sizeof(params));
1282
00e96dec 1283 sdata->wmm_acm = 0;
f0706e82
JB		 1284 for (; left >= 4; left -= 4, pos += 4) {
1285 int aci = (pos[0] >> 5) & 0x03;
1286 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1287 bool uapsd = false;
f0706e82
JB		 1288 int queue;
1289
1290 switch (aci) {
0eeb59fe 1291 case 1: /* AC_BK */
e100bb64 1292 queue = 3;
988c0f72 1293 if (acm)
00e96dec 1294 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1295 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1296 uapsd = true;
f0706e82 1297 break;
0eeb59fe 1298 case 2: /* AC_VI */
e100bb64 1299 queue = 1;
988c0f72 1300 if (acm)
00e96dec 1301 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1302 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1303 uapsd = true;
f0706e82 1304 break;
0eeb59fe 1305 case 3: /* AC_VO */
e100bb64 1306 queue = 0;
988c0f72 1307 if (acm)
00e96dec 1308 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1309 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1310 uapsd = true;
f0706e82 1311 break;
0eeb59fe 1312 case 0: /* AC_BE */
f0706e82 1313 default:
e100bb64 1314 queue = 2;
988c0f72 1315 if (acm)
00e96dec 1316 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1317 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1318 uapsd = true;
f0706e82
JB		 1319 break;
1320 }
1321
1322 params.aifs = pos[0] & 0x0f;
1323 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1324 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1325 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1326 params.uapsd = uapsd;
1327
bdcbd8e0
JB		 1328 mlme_dbg(sdata,
1329 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1330 queue, aci, acm,
1331 params.aifs, params.cw_min, params.cw_max,
1332 params.txop, params.uapsd);
f6f3def3
EP		 1333 sdata->tx_conf[queue] = params;
1334 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1335 sdata_err(sdata,
1336 "failed to set TX queue parameters for queue %d\n",
1337 queue);
f0706e82 1338 }
e1b3ec1a
SG		 1339
1340 /* enable WMM or activate new settings */
4ced3f74 1341 sdata->vif.bss_conf.qos = true;
7d25745d 1342 return true;
f0706e82
JB		 1343}
1344
925e64c3
SG		 1345static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1346{
1347 lockdep_assert_held(&sdata->local->mtx);
1348
1349 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1350 IEEE80211_STA_BEACON_POLL);
1351 ieee80211_run_deferred_scan(sdata->local);
1352}
1353
1354static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1355{
1356 mutex_lock(&sdata->local->mtx);
1357 __ieee80211_stop_poll(sdata);
1358 mutex_unlock(&sdata->local->mtx);
1359}
1360
7a5158ef
JB		 1361static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1362 u16 capab, bool erp_valid, u8 erp)
5628221c 1363{
bda3933a 1364 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1365 u32 changed = 0;
7a5158ef
JB		 1366 bool use_protection;
1367 bool use_short_preamble;
1368 bool use_short_slot;
1369
1370 if (erp_valid) {
1371 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1372 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1373 } else {
1374 use_protection = false;
1375 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1376 }
1377
1378 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1379 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1380 use_short_slot = true;
5628221c 1381
471b3efd 1382 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1383 bss_conf->use_cts_prot = use_protection;
1384 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1385 }
7e9ed188 1386
d43c7b37 1387 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1388 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1389 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1390 }
d9430a32 1391
7a5158ef 1392 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1393 bss_conf->use_short_slot = use_short_slot;
1394 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1395 }
1396
1397 return changed;
1398}
1399
f698d856 1400static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1401 struct cfg80211_bss *cbss,
ae5eb026 1402 u32 bss_info_changed)
f0706e82 1403{
0c1ad2ca 1404 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1405 struct ieee80211_local *local = sdata->local;
68542962 1406 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1407
ae5eb026 1408 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1409 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1410 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1411
7ccc8bd7
FF		 1412 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1413 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1414
0c1ad2ca
JB		 1415 sdata->u.mgd.associated = cbss;
1416 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1417
17e4ec14
JM		 1418 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1419
488dd7b5 1420 if (sdata->vif.p2p) {
9caf0364 1421 const struct cfg80211_bss_ies *ies;
488dd7b5 1422
9caf0364
JB		 1423 rcu_read_lock();
1424 ies = rcu_dereference(cbss->ies);
1425 if (ies) {
1426 u8 noa[2];
1427 int ret;
1428
1429 ret = cfg80211_get_p2p_attr(
1430 ies->data, ies->len,
1431 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1432 noa, sizeof(noa));
1433 if (ret >= 2) {
1434 bss_conf->p2p_oppps = noa[1] & 0x80;
1435 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1436 bss_info_changed |= BSS_CHANGED_P2P_PS;
1437 sdata->u.mgd.p2p_noa_index = noa[0];
1438 }
488dd7b5 1439 }
9caf0364 1440 rcu_read_unlock();
488dd7b5
JB		 1441 }
1442
b291ba11 1443 /* just to be sure */
925e64c3 1444 ieee80211_stop_poll(sdata);
b291ba11 1445
9ac19a90 1446 ieee80211_led_assoc(local, 1);
9306102e 1447
826262c3
JB		 1448 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
1449 /*
1450 * If the AP is buggy we may get here with no DTIM period
1451 * known, so assume it's 1 which is the only safe assumption
1452 * in that case, although if the TIM IE is broken powersave
1453 * probably just won't work at all.
1454 */
1455 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1456 } else {
e5b900d2 1457 bss_conf->dtim_period = 0;
826262c3 1458 }
e5b900d2 1459
68542962 1460 bss_conf->assoc = 1;
9cef8737 1461
a97c13c3 1462 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1463 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1464 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1465 bss_info_changed |= BSS_CHANGED_CQM;
1466
68542962 1467 /* Enable ARP filtering */
0f19b41e 1468 if (bss_conf->arp_addr_cnt)
68542962 1469 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1470
ae5eb026 1471 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1472
056508dc
JB		 1473 mutex_lock(&local->iflist_mtx);
1474 ieee80211_recalc_ps(local, -1);
1475 mutex_unlock(&local->iflist_mtx);
e0cb686f 1476
04ecd257 1477 ieee80211_recalc_smps(sdata);
ab095877
EP		 1478 ieee80211_recalc_ps_vif(sdata);
1479
8a5b33f5 1480 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1481 netif_carrier_on(sdata->dev);
f0706e82
JB		 1482}
1483
e69e95db 1484static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1485 u16 stype, u16 reason, bool tx,
1486 u8 *frame_buf)
aa458d17 1487{
46900298 1488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1489 struct ieee80211_local *local = sdata->local;
1490 struct sta_info *sta;
3cc5240b 1491 u32 changed = 0;
aa458d17 1492
77fdaa12
JB		 1493 ASSERT_MGD_MTX(ifmgd);
1494
37ad3888
JB		 1495 if (WARN_ON_ONCE(tx && !frame_buf))
1496 return;
1497
b291ba11
JB		 1498 if (WARN_ON(!ifmgd->associated))
1499 return;
1500
79543d8e
DS		 1501 ieee80211_stop_poll(sdata);
1502
77fdaa12 1503 ifmgd->associated = NULL;
77fdaa12
JB		 1504
1505 /*
1506 * we need to commit the associated = NULL change because the
1507 * scan code uses that to determine whether this iface should
1508 * go to/wake up from powersave or not -- and could otherwise
1509 * wake the queues erroneously.
1510 */
1511 smp_mb();
1512
1513 /*
1514 * Thus, we can only afterwards stop the queues -- to account
1515 * for the case where another CPU is finishing a scan at this
1516 * time -- we don't want the scan code to enable queues.
1517 */
aa458d17 1518
8a5b33f5 1519 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1520 netif_carrier_off(sdata->dev);
1521
2a419056 1522 mutex_lock(&local->sta_mtx);
88a9e31c 1523 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1524 if (sta) {
c2c98fde 1525 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
c82c4a80 1526 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
4cad6c7c 1527 }
2a419056 1528 mutex_unlock(&local->sta_mtx);
aa458d17 1529
88bc40e8
EP		 1530 /*
1531 * if we want to get out of ps before disassoc (why?) we have
1532 * to do it before sending disassoc, as otherwise the null-packet
1533 * won't be valid.
1534 */
1535 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1536 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1537 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1538 }
1539 local->ps_sdata = NULL;
1540
ab095877
EP		 1541 /* disable per-vif ps */
1542 ieee80211_recalc_ps_vif(sdata);
1543
f823981e
EP		 1544 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1545 if (tx)
1546 drv_flush(local, false);
1547
37ad3888
JB		 1548 /* deauthenticate/disassociate now */
1549 if (tx || frame_buf)
88a9e31c
EP		 1550 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1551 reason, tx, frame_buf);
37ad3888
JB		 1552
1553 /* flush out frame */
1554 if (tx)
1555 drv_flush(local, false);
1556
88a9e31c
EP		 1557 /* clear bssid only after building the needed mgmt frames */
1558 memset(ifmgd->bssid, 0, ETH_ALEN);
1559
37ad3888 1560 /* remove AP and TDLS peers */
051007d9 1561 sta_info_flush_defer(sdata);
37ad3888
JB		 1562
1563 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1564 changed |= ieee80211_reset_erp_info(sdata);
1565
f5e5bf25 1566 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1567 changed |= BSS_CHANGED_ASSOC;
1568 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1569
488dd7b5
JB		 1570 sdata->vif.bss_conf.p2p_ctwindow = 0;
1571 sdata->vif.bss_conf.p2p_oppps = false;
1572
413ad50a 1573 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1574 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1575 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1576
1ea6f9c0 1577 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1578
520eb820
KV		 1579 del_timer_sync(&local->dynamic_ps_timer);
1580 cancel_work_sync(&local->dynamic_ps_enable_work);
1581
68542962 1582 /* Disable ARP filtering */
0f19b41e 1583 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1584 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1585
3abead59
JB		 1586 sdata->vif.bss_conf.qos = false;
1587 changed |= BSS_CHANGED_QOS;
1588
0aaffa9b
JB		 1589 /* The BSSID (not really interesting) and HT changed */
1590 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1591 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1592
3abead59
JB		 1593 /* disassociated - set to defaults now */
1594 ieee80211_set_wmm_default(sdata, false);
1595
b9dcf712
JB		 1596 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1597 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1598 del_timer_sync(&sdata->u.mgd.timer);
1599 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1600
1601 sdata->u.mgd.timers_running = 0;
028e8da0 1602
826262c3
JB		 1603 sdata->vif.bss_conf.dtim_period = 0;
1604
028e8da0
JB		 1605 ifmgd->flags = 0;
1606 ieee80211_vif_release_channel(sdata);
aa458d17 1607}
f0706e82 1608
3cf335d5
KV		 1609void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1610 struct ieee80211_hdr *hdr)
1611{
1612 /*
1613 * We can postpone the mgd.timer whenever receiving unicast frames
1614 * from AP because we know that the connection is working both ways
1615 * at that time. But multicast frames (and hence also beacons) must
1616 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1617 * data idle periods for sending the periodic probe request to the
1618 * AP we're connected to.
3cf335d5 1619 */
b291ba11
JB		 1620 if (is_multicast_ether_addr(hdr->addr1))
1621 return;
1622
be099e82 1623 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1624}
f0706e82 1625
4e5ff376
FF		 1626static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1627{
1628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1629 struct ieee80211_local *local = sdata->local;
4e5ff376 1630
133d40f9 1631 mutex_lock(&local->mtx);
4e5ff376 1632 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1633 IEEE80211_STA_CONNECTION_POLL))) {
1634 mutex_unlock(&local->mtx);
1635 return;
1636 }
4e5ff376 1637
925e64c3 1638 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1639
1640 mutex_lock(&local->iflist_mtx);
1641 ieee80211_recalc_ps(local, -1);
1642 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1643
1644 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1645 goto out;
4e5ff376
FF		 1646
1647 /*
1648 * We've received a probe response, but are not sure whether
1649 * we have or will be receiving any beacons or data, so let's
1650 * schedule the timers again, just in case.
1651 */
1652 ieee80211_sta_reset_beacon_monitor(sdata);
1653
1654 mod_timer(&ifmgd->conn_mon_timer,
1655 round_jiffies_up(jiffies +
1656 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1657out:
133d40f9 1658 mutex_unlock(&local->mtx);
4e5ff376
FF		 1659}
1660
1661void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1662 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1663{
75706d0e 1664 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1665 return;
1666
04ac3c0e
FF		 1667 if (ack)
1668 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1669
1670 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1671 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1672 if (ack)
1673 sdata->u.mgd.probe_send_count = 0;
1674 else
1675 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1676 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1677 }
1678}
1679
a43abf29
ML		 1680static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1681{
1682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1683 const u8 *ssid;
f01a067d 1684 u8 *dst = ifmgd->associated->bssid;
180205bd 1685 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1686
1687 /*
1688 * Try sending broadcast probe requests for the last three
1689 * probe requests after the first ones failed since some
1690 * buggy APs only support broadcast probe requests.
1691 */
1692 if (ifmgd->probe_send_count >= unicast_limit)
1693 dst = NULL;
a43abf29 1694
4e5ff376
FF		 1695 /*
1696 * When the hardware reports an accurate Tx ACK status, it's
1697 * better to send a nullfunc frame instead of a probe request,
1698 * as it will kick us off the AP quickly if we aren't associated
1699 * anymore. The timeout will be reset if the frame is ACKed by
1700 * the AP.
1701 */
992e68bf
SD		 1702 ifmgd->probe_send_count++;
1703
04ac3c0e
FF		 1704 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1705 ifmgd->nullfunc_failed = false;
4e5ff376 1706 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1707 } else {
88c868c4
SG		 1708 int ssid_len;
1709
9caf0364 1710 rcu_read_lock();
4e5ff376 1711 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1712 if (WARN_ON_ONCE(ssid == NULL))
1713 ssid_len = 0;
1714 else
1715 ssid_len = ssid[1];
1716
1717 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1718 0, (u32) -1, true, false,
55de908a 1719 ifmgd->associated->channel, false);
9caf0364 1720 rcu_read_unlock();
4e5ff376 1721 }
a43abf29 1722
180205bd 1723 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1724 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1725 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1726 drv_flush(sdata->local, false);
a43abf29
ML		 1727}
1728
b291ba11
JB		 1729static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1730 bool beacon)
04de8381 1731{
04de8381 1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1733 bool already = false;
34bfc411 1734
9607e6b6 1735 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1736 return;
1737
77fdaa12
JB		 1738 mutex_lock(&ifmgd->mtx);
1739
1740 if (!ifmgd->associated)
1741 goto out;
1742
133d40f9
SG		 1743 mutex_lock(&sdata->local->mtx);
1744
1745 if (sdata->local->tmp_channel || sdata->local->scanning) {
1746 mutex_unlock(&sdata->local->mtx);
1747 goto out;
1748 }
1749
e87cc472 1750 if (beacon)
bdcbd8e0
JB		 1751 mlme_dbg_ratelimited(sdata,
1752 "detected beacon loss from AP - sending probe request\n");
1753
6efb71b0
HS		 1754 ieee80211_cqm_rssi_notify(&sdata->vif,
1755 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1756
b291ba11
JB		 1757 /*
1758 * The driver/our work has already reported this event or the
1759 * connection monitoring has kicked in and we have already sent
1760 * a probe request. Or maybe the AP died and the driver keeps
1761 * reporting until we disassociate...
1762 *
1763 * In either case we have to ignore the current call to this
1764 * function (except for setting the correct probe reason bit)
1765 * because otherwise we would reset the timer every time and
1766 * never check whether we received a probe response!
1767 */
1768 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1769 IEEE80211_STA_CONNECTION_POLL))
1770 already = true;
1771
1772 if (beacon)
1773 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1774 else
1775 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1776
133d40f9
SG		 1777 mutex_unlock(&sdata->local->mtx);
1778
b291ba11
JB		 1779 if (already)
1780 goto out;
1781
4e751843
JB		 1782 mutex_lock(&sdata->local->iflist_mtx);
1783 ieee80211_recalc_ps(sdata->local, -1);
1784 mutex_unlock(&sdata->local->iflist_mtx);
1785
a43abf29
ML		 1786 ifmgd->probe_send_count = 0;
1787 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1788 out:
1789 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1790}
1791
a619a4c0
JO		 1792struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1793 struct ieee80211_vif *vif)
1794{
1795 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1797 struct cfg80211_bss *cbss;
a619a4c0
JO		 1798 struct sk_buff *skb;
1799 const u8 *ssid;
88c868c4 1800 int ssid_len;
a619a4c0
JO		 1801
1802 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1803 return NULL;
1804
1805 ASSERT_MGD_MTX(ifmgd);
1806
d9b3b28b
EP		 1807 if (ifmgd->associated)
1808 cbss = ifmgd->associated;
1809 else if (ifmgd->auth_data)
1810 cbss = ifmgd->auth_data->bss;
1811 else if (ifmgd->assoc_data)
1812 cbss = ifmgd->assoc_data->bss;
1813 else
a619a4c0
JO		 1814 return NULL;
1815
9caf0364 1816 rcu_read_lock();
d9b3b28b 1817 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1818 if (WARN_ON_ONCE(ssid == NULL))
1819 ssid_len = 0;
1820 else
1821 ssid_len = ssid[1];
1822
d9b3b28b 1823 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1824 (u32) -1, cbss->channel,
6b77863b 1825 ssid + 2, ssid_len,
85a237fe 1826 NULL, 0, true);
9caf0364 1827 rcu_read_unlock();
a619a4c0
JO		 1828
1829 return skb;
1830}
1831EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1832
882a7c69
JB		 1833static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1834 bool transmit_frame)
1e4dcd01
JO		 1835{
1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1837 struct ieee80211_local *local = sdata->local;
6ae16775 1838 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1839
1840 mutex_lock(&ifmgd->mtx);
1841 if (!ifmgd->associated) {
1842 mutex_unlock(&ifmgd->mtx);
1843 return;
1844 }
1845
37ad3888
JB		 1846 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1847 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1848 transmit_frame, frame_buf);
1849 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1850 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1851
1e4dcd01
JO		 1852 /*
1853 * must be outside lock due to cfg80211,
1854 * but that's not a problem.
1855 */
6ae16775 1856 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1857
1858 mutex_lock(&local->mtx);
1859 ieee80211_recalc_idle(local);
1860 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1861}
1862
cc74c0c7 1863static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1864{
1865 struct ieee80211_sub_if_data *sdata =
1866 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1867 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1869 struct sta_info *sta;
1870
1871 if (ifmgd->associated) {
30fa9047 1872 rcu_read_lock();
a85e1d55
PS		 1873 sta = sta_info_get(sdata, ifmgd->bssid);
1874 if (sta)
1875 sta->beacon_loss_count++;
30fa9047 1876 rcu_read_unlock();
a85e1d55 1877 }
b291ba11 1878
882a7c69
JB		 1879 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1880 sdata_info(sdata, "Connection to AP %pM lost\n",
1881 ifmgd->bssid);
1882 __ieee80211_disconnect(sdata, false);
1883 } else {
1e4dcd01 1884 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1885 }
1886}
1887
1888static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1889{
1890 struct ieee80211_sub_if_data *sdata =
1891 container_of(work, struct ieee80211_sub_if_data,
1892 u.mgd.csa_connection_drop_work);
1893
1894 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1895 IEEE80211_QUEUE_STOP_REASON_CSA);
1896 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1897}
1898
04de8381
KV		 1899void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1900{
1901 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1902 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1903
b5878a2d
JB		 1904 trace_api_beacon_loss(sdata);
1905
1e4dcd01
JO		 1906 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1907 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1908}
1909EXPORT_SYMBOL(ieee80211_beacon_loss);
1910
1e4dcd01
JO		 1911void ieee80211_connection_loss(struct ieee80211_vif *vif)
1912{
1913 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1914 struct ieee80211_hw *hw = &sdata->local->hw;
1915
b5878a2d
JB		 1916 trace_api_connection_loss(sdata);
1917
1e4dcd01
JO		 1918 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1919 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1920}
1921EXPORT_SYMBOL(ieee80211_connection_loss);
1922
1923
66e67e41
JB		 1924static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1925 bool assoc)
1926{
1927 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1928
1929 lockdep_assert_held(&sdata->u.mgd.mtx);
1930
66e67e41
JB		 1931 if (!assoc) {
1932 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1933
1934 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1935 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1936 sdata->u.mgd.flags = 0;
55de908a 1937 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1938 }
1939
1940 cfg80211_put_bss(auth_data->bss);
1941 kfree(auth_data);
1942 sdata->u.mgd.auth_data = NULL;
1943}
1944
1945static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1946 struct ieee80211_mgmt *mgmt, size_t len)
1947{
1948 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1949 u8 *pos;
1950 struct ieee802_11_elems elems;
1951
1952 pos = mgmt->u.auth.variable;
1953 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1954 if (!elems.challenge)
1955 return;
1956 auth_data->expected_transaction = 4;
a1845fc7 1957 drv_mgd_prepare_tx(sdata->local, sdata);
700e8ea6 1958 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1959 elems.challenge - 2, elems.challenge_len + 2,
1960 auth_data->bss->bssid, auth_data->bss->bssid,
1961 auth_data->key, auth_data->key_len,
1962 auth_data->key_idx);
1963}
1964
1965static enum rx_mgmt_action __must_check
1966ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1967 struct ieee80211_mgmt *mgmt, size_t len)
1968{
1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970 u8 bssid[ETH_ALEN];
1971 u16 auth_alg, auth_transaction, status_code;
1972 struct sta_info *sta;
1973
1974 lockdep_assert_held(&ifmgd->mtx);
1975
1976 if (len < 24 + 6)
1977 return RX_MGMT_NONE;
1978
1979 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1980 return RX_MGMT_NONE;
1981
1982 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1983
b203ca39 1984 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1985 return RX_MGMT_NONE;
1986
1987 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1988 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1989 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1990
1991 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1992 auth_transaction != ifmgd->auth_data->expected_transaction) {
1993 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1994 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1995 auth_transaction,
1996 ifmgd->auth_data->expected_transaction);
66e67e41 1997 return RX_MGMT_NONE;
0f4126e8 1998 }
66e67e41
JB		 1999
2000 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2001 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2002 mgmt->sa, status_code);
dac211ec
EP		 2003 ieee80211_destroy_auth_data(sdata, false);
2004 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2005 }
2006
2007 switch (ifmgd->auth_data->algorithm) {
2008 case WLAN_AUTH_OPEN:
2009 case WLAN_AUTH_LEAP:
2010 case WLAN_AUTH_FT:
6b8ece3a 2011 case WLAN_AUTH_SAE:
66e67e41
JB		 2012 break;
2013 case WLAN_AUTH_SHARED_KEY:
2014 if (ifmgd->auth_data->expected_transaction != 4) {
2015 ieee80211_auth_challenge(sdata, mgmt, len);
2016 /* need another frame */
2017 return RX_MGMT_NONE;
2018 }
2019 break;
2020 default:
2021 WARN_ONCE(1, "invalid auth alg %d",
2022 ifmgd->auth_data->algorithm);
2023 return RX_MGMT_NONE;
2024 }
2025
bdcbd8e0 2026 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2027 ifmgd->auth_data->done = true;
2028 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2029 run_again(ifmgd, ifmgd->auth_data->timeout);
2030
6b8ece3a
JM		 2031 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2032 ifmgd->auth_data->expected_transaction != 2) {
2033 /*
2034 * Report auth frame to user space for processing since another
2035 * round of Authentication frames is still needed.
2036 */
2037 return RX_MGMT_CFG80211_RX_AUTH;
2038 }
2039
66e67e41
JB		 2040 /* move station state to auth */
2041 mutex_lock(&sdata->local->sta_mtx);
2042 sta = sta_info_get(sdata, bssid);
2043 if (!sta) {
2044 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2045 goto out_err;
2046 }
2047 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2048 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2049 goto out_err;
2050 }
2051 mutex_unlock(&sdata->local->sta_mtx);
2052
2053 return RX_MGMT_CFG80211_RX_AUTH;
2054 out_err:
2055 mutex_unlock(&sdata->local->sta_mtx);
2056 /* ignore frame -- wait for timeout */
2057 return RX_MGMT_NONE;
2058}
2059
2060
77fdaa12
JB		 2061static enum rx_mgmt_action __must_check
2062ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2063 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2064{
46900298 2065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2066 const u8 *bssid = NULL;
f0706e82
JB		 2067 u16 reason_code;
2068
66e67e41
JB		 2069 lockdep_assert_held(&ifmgd->mtx);
2070
f4ea83dd 2071 if (len < 24 + 2)
77fdaa12 2072 return RX_MGMT_NONE;
f0706e82 2073
66e67e41 2074 if (!ifmgd->associated ||
b203ca39 2075 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2076 return RX_MGMT_NONE;
77fdaa12 2077
0c1ad2ca 2078 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2079
2080 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2081
bdcbd8e0
JB		 2082 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2083 bssid, reason_code);
77fdaa12 2084
37ad3888
JB		 2085 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2086
7da7cc1d 2087 mutex_lock(&sdata->local->mtx);
63f170e0 2088 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2089 mutex_unlock(&sdata->local->mtx);
f0706e82 2090
77fdaa12 2091 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2092}
2093
2094
77fdaa12
JB		 2095static enum rx_mgmt_action __must_check
2096ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2097 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2098{
46900298 2099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2100 u16 reason_code;
2101
66e67e41 2102 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2103
66e67e41 2104 if (len < 24 + 2)
77fdaa12
JB		 2105 return RX_MGMT_NONE;
2106
66e67e41 2107 if (!ifmgd->associated ||
b203ca39 2108 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2109 return RX_MGMT_NONE;
f0706e82
JB		 2110
2111 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2112
bdcbd8e0
JB		 2113 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2114 mgmt->sa, reason_code);
f0706e82 2115
37ad3888
JB		 2116 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2117
7da7cc1d 2118 mutex_lock(&sdata->local->mtx);
bc83b681 2119 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2120 mutex_unlock(&sdata->local->mtx);
37ad3888 2121
77fdaa12 2122 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2123}
2124
c74d084f
CL		 2125static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2126 u8 *supp_rates, unsigned int supp_rates_len,
2127 u32 *rates, u32 *basic_rates,
2128 bool *have_higher_than_11mbit,
2129 int *min_rate, int *min_rate_index)
2130{
2131 int i, j;
2132
2133 for (i = 0; i < supp_rates_len; i++) {
2134 int rate = (supp_rates[i] & 0x7f) * 5;
2135 bool is_basic = !!(supp_rates[i] & 0x80);
2136
2137 if (rate > 110)
2138 *have_higher_than_11mbit = true;
2139
2140 /*
2141 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2142 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2143 *
2144 * Note: Even through the membership selector and the basic
2145 * rate flag share the same bit, they are not exactly
2146 * the same.
2147 */
2148 if (!!(supp_rates[i] & 0x80) &&
2149 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2150 continue;
2151
2152 for (j = 0; j < sband->n_bitrates; j++) {
2153 if (sband->bitrates[j].bitrate == rate) {
2154 *rates |= BIT(j);
2155 if (is_basic)
2156 *basic_rates |= BIT(j);
2157 if (rate < *min_rate) {
2158 *min_rate = rate;
2159 *min_rate_index = j;
2160 }
2161 break;
2162 }
2163 }
2164 }
2165}
f0706e82 2166
66e67e41
JB		 2167static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2168 bool assoc)
2169{
2170 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2171
2172 lockdep_assert_held(&sdata->u.mgd.mtx);
2173
66e67e41
JB		 2174 if (!assoc) {
2175 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2176
2177 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2178 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2179 sdata->u.mgd.flags = 0;
55de908a 2180 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2181 }
2182
2183 kfree(assoc_data);
2184 sdata->u.mgd.assoc_data = NULL;
2185}
2186
2187static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2188 struct cfg80211_bss *cbss,
af6b6374 2189 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2190{
46900298 2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2192 struct ieee80211_local *local = sdata->local;
8318d78a 2193 struct ieee80211_supported_band *sband;
f0706e82 2194 struct sta_info *sta;
af6b6374 2195 u8 *pos;
af6b6374 2196 u16 capab_info, aid;
f0706e82 2197 struct ieee802_11_elems elems;
bda3933a 2198 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2199 u32 changed = 0;
c74d084f 2200 int err;
f0706e82 2201
af6b6374 2202 /* AssocResp and ReassocResp have identical structure */
f0706e82 2203
f0706e82 2204 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2205 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2206
1dd84aa2 2207 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2208 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2209 aid);
1dd84aa2
JB		 2210 aid &= ~(BIT(15) | BIT(14));
2211
05cb9108
JB		 2212 ifmgd->broken_ap = false;
2213
2214 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2215 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2216 aid);
05cb9108
JB		 2217 aid = 0;
2218 ifmgd->broken_ap = true;
2219 }
2220
af6b6374
JB		 2221 pos = mgmt->u.assoc_resp.variable;
2222 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2223
f0706e82 2224 if (!elems.supp_rates) {
bdcbd8e0 2225 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2226 return false;
f0706e82
JB		 2227 }
2228
46900298 2229 ifmgd->aid = aid;
f0706e82 2230
2a33bee2
GE		 2231 mutex_lock(&sdata->local->sta_mtx);
2232 /*
2233 * station info was already allocated and inserted before
2234 * the association and should be available to us
2235 */
7852e361 2236 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2237 if (WARN_ON(!sta)) {
2238 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2239 return false;
77fdaa12 2240 }
05e5e883 2241
55de908a 2242 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2243
a8243b72 2244 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2245 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2246 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2247
64f68e5d
JB		 2248 sta->supports_40mhz =
2249 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2250
818255ea
MP		 2251 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2252 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2253 elems.vht_cap_elem,
2254 &sta->sta.vht_cap);
2255
4b7679a5 2256 rate_control_rate_init(sta);
f0706e82 2257
46900298 2258 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2259 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2260
ddf4ac53 2261 if (elems.wmm_param)
c2c98fde 2262 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2263
c8987876
JB		 2264 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2265 if (!err)
2266 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2267 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2268 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2269 if (err) {
bdcbd8e0
JB		 2270 sdata_info(sdata,
2271 "failed to move station %pM to desired state\n",
2272 sta->sta.addr);
c8987876
JB		 2273 WARN_ON(__sta_info_destroy(sta));
2274 mutex_unlock(&sdata->local->sta_mtx);
2275 return false;
2276 }
2277
7852e361 2278 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2279
f2176d72
JO		 2280 /*
2281 * Always handle WMM once after association regardless
2282 * of the first value the AP uses. Setting -1 here has
2283 * that effect because the AP values is an unsigned
2284 * 4-bit value.
2285 */
2286 ifmgd->wmm_last_param_set = -1;
2287
ddf4ac53 2288 if (elems.wmm_param)
4ced3f74 2289 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2290 elems.wmm_param_len);
aa837e1d 2291 else
3abead59
JB		 2292 ieee80211_set_wmm_default(sdata, false);
2293 changed |= BSS_CHANGED_QOS;
f0706e82 2294
074d46d1 2295 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2296 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2297 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2298 cbss->bssid, false);
ae5eb026 2299
60f8b39c
JB		 2300 /* set AID and assoc capability,
2301 * ieee80211_set_associated() will tell the driver */
2302 bss_conf->aid = aid;
2303 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2304 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2305
d524215f
FF		 2306 /*
2307 * If we're using 4-addr mode, let the AP know that we're
2308 * doing so, so that it can create the STA VLAN on its side
2309 */
2310 if (ifmgd->use_4addr)
2311 ieee80211_send_4addr_nullfunc(local, sdata);
2312
15b7b062 2313 /*
b291ba11
JB		 2314 * Start timer to probe the connection to the AP now.
2315 * Also start the timer that will detect beacon loss.
15b7b062 2316 */
b291ba11 2317 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2318 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2319
af6b6374 2320 return true;
f0706e82
JB		 2321}
2322
66e67e41
JB		 2323static enum rx_mgmt_action __must_check
2324ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2325 struct ieee80211_mgmt *mgmt, size_t len,
2326 struct cfg80211_bss **bss)
2327{
2328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2329 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2330 u16 capab_info, status_code, aid;
2331 struct ieee802_11_elems elems;
2332 u8 *pos;
2333 bool reassoc;
2334
2335 lockdep_assert_held(&ifmgd->mtx);
2336
2337 if (!assoc_data)
2338 return RX_MGMT_NONE;
b203ca39 2339 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2340 return RX_MGMT_NONE;
2341
2342 /*
2343 * AssocResp and ReassocResp have identical structure, so process both
2344 * of them in this function.
2345 */
2346
2347 if (len < 24 + 6)
2348 return RX_MGMT_NONE;
2349
2350 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2351 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2352 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2353 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2354
bdcbd8e0
JB		 2355 sdata_info(sdata,
2356 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2357 reassoc ? "Rea" : "A", mgmt->sa,
2358 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2359
2360 pos = mgmt->u.assoc_resp.variable;
2361 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2362
2363 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2364 elems.timeout_int && elems.timeout_int_len == 5 &&
2365 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2366 u32 tu, ms;
2367 tu = get_unaligned_le32(elems.timeout_int + 1);
2368 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2369 sdata_info(sdata,
2370 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2371 mgmt->sa, tu, ms);
66e67e41
JB		 2372 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2373 if (ms > IEEE80211_ASSOC_TIMEOUT)
2374 run_again(ifmgd, assoc_data->timeout);
2375 return RX_MGMT_NONE;
2376 }
2377
2378 *bss = assoc_data->bss;
2379
2380 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2381 sdata_info(sdata, "%pM denied association (code=%d)\n",
2382 mgmt->sa, status_code);
66e67e41
JB		 2383 ieee80211_destroy_assoc_data(sdata, false);
2384 } else {
66e67e41
JB		 2385 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2386 /* oops -- internal error -- send timeout for now */
10a9109f 2387 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2388 cfg80211_put_bss(*bss);
2389 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2390 }
635d999f 2391 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2392
2393 /*
2394 * destroy assoc_data afterwards, as otherwise an idle
2395 * recalc after assoc_data is NULL but before associated
2396 * is set can cause the interface to go idle
2397 */
2398 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2399 }
2400
2401 return RX_MGMT_CFG80211_RX_ASSOC;
2402}
8e3c1b77 2403
98c8fccf 2404static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2405 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2406 struct ieee80211_rx_status *rx_status,
d45c4172 2407 struct ieee802_11_elems *elems)
98c8fccf
JB		 2408{
2409 struct ieee80211_local *local = sdata->local;
2410 int freq;
c2b13452 2411 struct ieee80211_bss *bss;
98c8fccf 2412 struct ieee80211_channel *channel;
56007a02
JB		 2413 bool need_ps = false;
2414
826262c3
JB		 2415 if ((sdata->u.mgd.associated &&
2416 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2417 (sdata->u.mgd.assoc_data &&
2418 ether_addr_equal(mgmt->bssid,
2419 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2420 /* not previously set so we may need to recalc */
826262c3
JB		 2421 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2422
2423 if (elems->tim && !elems->parse_error) {
2424 struct ieee80211_tim_ie *tim_ie = elems->tim;
2425 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2426 }
56007a02 2427 }
98c8fccf
JB		 2428
2429 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2430 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2431 rx_status->band);
98c8fccf
JB		 2432 else
2433 freq = rx_status->freq;
2434
2435 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2436
2437 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2438 return;
2439
98c8fccf 2440 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2441 channel);
77fdaa12
JB		 2442 if (bss)
2443 ieee80211_rx_bss_put(local, bss);
2444
2445 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2446 return;
2447
56007a02
JB		 2448 if (need_ps) {
2449 mutex_lock(&local->iflist_mtx);
2450 ieee80211_recalc_ps(local, -1);
2451 mutex_unlock(&local->iflist_mtx);
2452 }
2453
5bc1420b
JB		 2454 if (elems->ch_switch_ie &&
2455 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2456 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2457 bss, rx_status->mactime);
f0706e82
JB		 2458}
2459
2460
f698d856 2461static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2462 struct sk_buff *skb)
f0706e82 2463{
af6b6374 2464 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2465 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2466 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2467 size_t baselen, len = skb->len;
ae6a44e3
EK		 2468 struct ieee802_11_elems elems;
2469
15b7b062
KV		 2470 ifmgd = &sdata->u.mgd;
2471
77fdaa12
JB		 2472 ASSERT_MGD_MTX(ifmgd);
2473
b203ca39 2474 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2475 return; /* ignore ProbeResp to foreign address */
2476
ae6a44e3
EK		 2477 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2478 if (baselen > len)
2479 return;
2480
2481 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2482 &elems);
2483
d45c4172 2484 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2485
77fdaa12 2486 if (ifmgd->associated &&
b203ca39 2487 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2488 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2489
2490 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2491 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2492 /* got probe response, continue with auth */
bdcbd8e0 2493 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2494 ifmgd->auth_data->tries = 0;
2495 ifmgd->auth_data->timeout = jiffies;
2496 run_again(ifmgd, ifmgd->auth_data->timeout);
2497 }
f0706e82
JB		 2498}
2499
d91f36db
JB		 2500/*
2501 * This is the canonical list of information elements we care about,
2502 * the filter code also gives us all changes to the Microsoft OUI
2503 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2504 *
2505 * We implement beacon filtering in software since that means we can
2506 * avoid processing the frame here and in cfg80211, and userspace
2507 * will not be able to tell whether the hardware supports it or not.
2508 *
2509 * XXX: This list needs to be dynamic -- userspace needs to be able to
2510 * add items it requires. It also needs to be able to tell us to
2511 * look out for other vendor IEs.
2512 */
2513static const u64 care_about_ies =
1d4df3a5
JB		 2514 (1ULL << WLAN_EID_COUNTRY) |
2515 (1ULL << WLAN_EID_ERP_INFO) |
2516 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2517 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2518 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2519 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2520
f698d856 2521static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2522 struct ieee80211_mgmt *mgmt,
2523 size_t len,
2524 struct ieee80211_rx_status *rx_status)
2525{
d91f36db 2526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2528 size_t baselen;
2529 struct ieee802_11_elems elems;
f698d856 2530 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2531 struct ieee80211_chanctx_conf *chanctx_conf;
2532 struct ieee80211_channel *chan;
471b3efd 2533 u32 changed = 0;
f87ad637 2534 bool erp_valid;
7a5158ef 2535 u8 erp_value = 0;
d91f36db 2536 u32 ncrc;
77fdaa12
JB		 2537 u8 *bssid;
2538
66e67e41 2539 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2540
ae6a44e3
EK		 2541 /* Process beacon from the current BSS */
2542 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2543 if (baselen > len)
2544 return;
2545
55de908a
JB		 2546 rcu_read_lock();
2547 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2548 if (!chanctx_conf) {
2549 rcu_read_unlock();
f0706e82 2550 return;
55de908a
JB		 2551 }
2552
4bf88530 2553 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2554 rcu_read_unlock();
2555 return;
2556 }
4bf88530 2557 chan = chanctx_conf->def.chan;
55de908a 2558 rcu_read_unlock();
f0706e82 2559
66e67e41 2560 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2561 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2562 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2563 len - baselen, &elems);
77fdaa12 2564
d45c4172 2565 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41
JB		 2566 ifmgd->assoc_data->have_beacon = true;
2567 ifmgd->assoc_data->sent_assoc = false;
2568 /* continue assoc process */
2569 ifmgd->assoc_data->timeout = jiffies;
2570 run_again(ifmgd, ifmgd->assoc_data->timeout);
2571 return;
2572 }
77fdaa12 2573
66e67e41 2574 if (!ifmgd->associated ||
b203ca39 2575 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2576 return;
66e67e41 2577 bssid = ifmgd->associated->bssid;
f0706e82 2578
17e4ec14
JM		 2579 /* Track average RSSI from the Beacon frames of the current AP */
2580 ifmgd->last_beacon_signal = rx_status->signal;
2581 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2582 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2583 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2584 ifmgd->last_cqm_event_signal = 0;
391a200a 2585 ifmgd->count_beacon_signal = 1;
615f7b9b 2586 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2587 } else {
2588 ifmgd->ave_beacon_signal =
2589 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2590 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2591 ifmgd->ave_beacon_signal) / 16;
391a200a 2592 ifmgd->count_beacon_signal++;
17e4ec14 2593 }
615f7b9b
MV		 2594
2595 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2596 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2597 int sig = ifmgd->ave_beacon_signal;
2598 int last_sig = ifmgd->last_ave_beacon_signal;
2599
2600 /*
2601 * if signal crosses either of the boundaries, invoke callback
2602 * with appropriate parameters
2603 */
2604 if (sig > ifmgd->rssi_max_thold &&
2605 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2606 ifmgd->last_ave_beacon_signal = sig;
2607 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2608 } else if (sig < ifmgd->rssi_min_thold &&
2609 (last_sig >= ifmgd->rssi_max_thold ||
2610 last_sig == 0)) {
2611 ifmgd->last_ave_beacon_signal = sig;
2612 drv_rssi_callback(local, RSSI_EVENT_LOW);
2613 }
2614 }
2615
17e4ec14 2616 if (bss_conf->cqm_rssi_thold &&
391a200a 2617 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2618 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2619 int sig = ifmgd->ave_beacon_signal / 16;
2620 int last_event = ifmgd->last_cqm_event_signal;
2621 int thold = bss_conf->cqm_rssi_thold;
2622 int hyst = bss_conf->cqm_rssi_hyst;
2623 if (sig < thold &&
2624 (last_event == 0 || sig < last_event - hyst)) {
2625 ifmgd->last_cqm_event_signal = sig;
2626 ieee80211_cqm_rssi_notify(
2627 &sdata->vif,
2628 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2629 GFP_KERNEL);
2630 } else if (sig > thold &&
2631 (last_event == 0 || sig > last_event + hyst)) {
2632 ifmgd->last_cqm_event_signal = sig;
2633 ieee80211_cqm_rssi_notify(
2634 &sdata->vif,
2635 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2636 GFP_KERNEL);
2637 }
2638 }
2639
b291ba11 2640 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2641 mlme_dbg_ratelimited(sdata,
2642 "cancelling probereq poll due to a received beacon\n");
925e64c3 2643 mutex_lock(&local->mtx);
b291ba11 2644 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2645 ieee80211_run_deferred_scan(local);
2646 mutex_unlock(&local->mtx);
2647
4e751843
JB		 2648 mutex_lock(&local->iflist_mtx);
2649 ieee80211_recalc_ps(local, -1);
2650 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2651 }
2652
b291ba11
JB		 2653 /*
2654 * Push the beacon loss detection into the future since
2655 * we are processing a beacon from the AP just now.
2656 */
d3a910a8 2657 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2658
d91f36db
JB		 2659 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2660 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2661 len - baselen, &elems,
2662 care_about_ies, ncrc);
2663
25c9c875 2664 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2665 bool directed_tim = ieee80211_check_tim(elems.tim,
2666 elems.tim_len,
2667 ifmgd->aid);
1fb3606b 2668 if (directed_tim) {
572e0012 2669 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2670 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2671 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2672 ieee80211_hw_config(local,
2673 IEEE80211_CONF_CHANGE_PS);
2674 }
572e0012 2675 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2676 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2677 local->pspolling = true;
2678
2679 /*
2680 * Here is assumed that the driver will be
2681 * able to send ps-poll frame and receive a
2682 * response even though power save mode is
2683 * enabled, but some drivers might require
2684 * to disable power save here. This needs
2685 * to be investigated.
2686 */
2687 ieee80211_send_pspoll(local, sdata);
2688 }
a97b77b9
VN		 2689 }
2690 }
7a5158ef 2691
488dd7b5
JB		 2692 if (sdata->vif.p2p) {
2693 u8 noa[2];
2694 int ret;
2695
2696 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2697 len - baselen,
2698 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2699 noa, sizeof(noa));
2700 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2701 bss_conf->p2p_oppps = noa[1] & 0x80;
2702 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2703 changed |= BSS_CHANGED_P2P_PS;
2704 sdata->u.mgd.p2p_noa_index = noa[0];
2705 /*
2706 * make sure we update all information, the CRC
2707 * mechanism doesn't look at P2P attributes.
2708 */
2709 ifmgd->beacon_crc_valid = false;
2710 }
2711 }
2712
d8ec4433 2713 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2714 return;
2715 ifmgd->beacon_crc = ncrc;
d8ec4433 2716 ifmgd->beacon_crc_valid = true;
30196673 2717
d45c4172 2718 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2719
2720 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2721 elems.wmm_param_len))
2722 changed |= BSS_CHANGED_QOS;
2723
7a5158ef
JB		 2724 if (elems.erp_info && elems.erp_info_len >= 1) {
2725 erp_valid = true;
2726 erp_value = elems.erp_info[0];
2727 } else {
2728 erp_valid = false;
50c4afb9 2729 }
7a5158ef
JB		 2730 changed |= ieee80211_handle_bss_capability(sdata,
2731 le16_to_cpu(mgmt->u.beacon.capab_info),
2732 erp_valid, erp_value);
f0706e82 2733
d3c990fb 2734
074d46d1 2735 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2736 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2737 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2738 bssid, true);
d3c990fb 2739
04b7b2ff
JB		 2740 if (elems.country_elem && elems.pwr_constr_elem &&
2741 mgmt->u.probe_resp.capab_info &
2742 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2743 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2744 elems.country_elem,
2745 elems.country_elem_len,
2746 elems.pwr_constr_elem);
3f2355cb 2747
471b3efd 2748 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2749}
2750
1fa57d01
JB		 2751void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2752 struct sk_buff *skb)
f0706e82 2753{
77fdaa12 2754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2755 struct ieee80211_rx_status *rx_status;
f0706e82 2756 struct ieee80211_mgmt *mgmt;
66e67e41 2757 struct cfg80211_bss *bss = NULL;
77fdaa12 2758 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2759 u16 fc;
2760
f0706e82
JB		 2761 rx_status = (struct ieee80211_rx_status *) skb->cb;
2762 mgmt = (struct ieee80211_mgmt *) skb->data;
2763 fc = le16_to_cpu(mgmt->frame_control);
2764
77fdaa12
JB		 2765 mutex_lock(&ifmgd->mtx);
2766
66e67e41
JB		 2767 switch (fc & IEEE80211_FCTL_STYPE) {
2768 case IEEE80211_STYPE_BEACON:
2769 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2770 break;
2771 case IEEE80211_STYPE_PROBE_RESP:
2772 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2773 break;
2774 case IEEE80211_STYPE_AUTH:
2775 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2776 break;
2777 case IEEE80211_STYPE_DEAUTH:
2778 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2779 break;
2780 case IEEE80211_STYPE_DISASSOC:
2781 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2782 break;
2783 case IEEE80211_STYPE_ASSOC_RESP:
2784 case IEEE80211_STYPE_REASSOC_RESP:
2785 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2786 break;
2787 case IEEE80211_STYPE_ACTION:
2788 switch (mgmt->u.action.category) {
2789 case WLAN_CATEGORY_SPECTRUM_MGMT:
2790 ieee80211_sta_process_chanswitch(sdata,
2791 &mgmt->u.action.u.chan_switch.sw_elem,
2792 (void *)ifmgd->associated->priv,
2793 rx_status->mactime);
77fdaa12 2794 break;
77fdaa12 2795 }
77fdaa12 2796 }
77fdaa12
JB		 2797 mutex_unlock(&ifmgd->mtx);
2798
66e67e41
JB		 2799 switch (rma) {
2800 case RX_MGMT_NONE:
2801 /* no action */
2802 break;
2803 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2804 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2805 break;
2806 case RX_MGMT_CFG80211_DISASSOC:
2807 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2808 break;
2809 case RX_MGMT_CFG80211_RX_AUTH:
2810 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2811 break;
2812 case RX_MGMT_CFG80211_RX_ASSOC:
2813 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2814 break;
2815 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2816 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2817 break;
2818 default:
2819 WARN(1, "unexpected: %d", rma);
b054b747 2820 }
f0706e82
JB		 2821}
2822
9c6bd790 2823static void ieee80211_sta_timer(unsigned long data)
f0706e82 2824{
60f8b39c
JB		 2825 struct ieee80211_sub_if_data *sdata =
2826 (struct ieee80211_sub_if_data *) data;
46900298 2827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2828 struct ieee80211_local *local = sdata->local;
f0706e82 2829
5bb644a0
JB		 2830 if (local->quiescing) {
2831 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2832 return;
2833 }
2834
64592c8f 2835 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2836}
2837
04ac3c0e 2838static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2839 u8 *bssid, u8 reason)
04ac3c0e
FF		 2840{
2841 struct ieee80211_local *local = sdata->local;
2842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2843 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2844
37ad3888
JB		 2845 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2846 false, frame_buf);
04ac3c0e 2847 mutex_unlock(&ifmgd->mtx);
37ad3888 2848
04ac3c0e
FF		 2849 /*
2850 * must be outside lock due to cfg80211,
2851 * but that's not a problem.
2852 */
6ae16775 2853 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2854
2855 mutex_lock(&local->mtx);
2856 ieee80211_recalc_idle(local);
2857 mutex_unlock(&local->mtx);
2858
04ac3c0e
FF		 2859 mutex_lock(&ifmgd->mtx);
2860}
2861
66e67e41
JB		 2862static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2863{
2864 struct ieee80211_local *local = sdata->local;
2865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2867
2868 lockdep_assert_held(&ifmgd->mtx);
2869
2870 if (WARN_ON_ONCE(!auth_data))
2871 return -EINVAL;
2872
66e67e41
JB		 2873 auth_data->tries++;
2874
2875 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2876 sdata_info(sdata, "authentication with %pM timed out\n",
2877 auth_data->bss->bssid);
66e67e41
JB		 2878
2879 /*
2880 * Most likely AP is not in the range so remove the
2881 * bss struct for that AP.
2882 */
2883 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2884
2885 return -ETIMEDOUT;
2886 }
2887
a1845fc7
JB		 2888 drv_mgd_prepare_tx(local, sdata);
2889
66e67e41 2890 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2891 u16 trans = 1;
2892 u16 status = 0;
2893
bdcbd8e0
JB		 2894 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2895 auth_data->bss->bssid, auth_data->tries,
2896 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2897
2898 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2899
2900 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2901 trans = auth_data->sae_trans;
2902 status = auth_data->sae_status;
2903 auth_data->expected_transaction = trans;
2904 }
2905
2906 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2907 auth_data->data, auth_data->data_len,
66e67e41
JB		 2908 auth_data->bss->bssid,
2909 auth_data->bss->bssid, NULL, 0, 0);
2910 } else {
2911 const u8 *ssidie;
2912
bdcbd8e0
JB		 2913 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2914 auth_data->bss->bssid, auth_data->tries,
2915 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2916
9caf0364 2917 rcu_read_lock();
66e67e41 2918 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2919 if (!ssidie) {
2920 rcu_read_unlock();
66e67e41 2921 return -EINVAL;
9caf0364 2922 }
66e67e41
JB		 2923 /*
2924 * Direct probe is sent to broadcast address as some APs
2925 * will not answer to direct packet in unassociated state.
2926 */
2927 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2928 NULL, 0, (u32) -1, true, false,
55de908a 2929 auth_data->bss->channel, false);
9caf0364 2930 rcu_read_unlock();
66e67e41
JB		 2931 }
2932
2933 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2934 run_again(ifmgd, auth_data->timeout);
2935
2936 return 0;
2937}
2938
2939static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2940{
2941 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2942 struct ieee80211_local *local = sdata->local;
2943
2944 lockdep_assert_held(&sdata->u.mgd.mtx);
2945
66e67e41
JB		 2946 assoc_data->tries++;
2947 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2948 sdata_info(sdata, "association with %pM timed out\n",
2949 assoc_data->bss->bssid);
66e67e41
JB		 2950
2951 /*
2952 * Most likely AP is not in the range so remove the
2953 * bss struct for that AP.
2954 */
2955 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2956
2957 return -ETIMEDOUT;
2958 }
2959
bdcbd8e0
JB		 2960 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2961 assoc_data->bss->bssid, assoc_data->tries,
2962 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2963 ieee80211_send_assoc(sdata);
2964
2965 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2966 run_again(&sdata->u.mgd, assoc_data->timeout);
2967
2968 return 0;
2969}
2970
1fa57d01 2971void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2972{
9c6bd790 2973 struct ieee80211_local *local = sdata->local;
1fa57d01 2974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2975
77fdaa12
JB		 2976 mutex_lock(&ifmgd->mtx);
2977
66e67e41
JB		 2978 if (ifmgd->auth_data &&
2979 time_after(jiffies, ifmgd->auth_data->timeout)) {
2980 if (ifmgd->auth_data->done) {
2981 /*
2982 * ok ... we waited for assoc but userspace didn't,
2983 * so let's just kill the auth data
2984 */
2985 ieee80211_destroy_auth_data(sdata, false);
2986 } else if (ieee80211_probe_auth(sdata)) {
2987 u8 bssid[ETH_ALEN];
2988
2989 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2990
2991 ieee80211_destroy_auth_data(sdata, false);
2992
2993 mutex_unlock(&ifmgd->mtx);
2994 cfg80211_send_auth_timeout(sdata->dev, bssid);
2995 mutex_lock(&ifmgd->mtx);
2996 }
2997 } else if (ifmgd->auth_data)
2998 run_again(ifmgd, ifmgd->auth_data->timeout);
2999
3000 if (ifmgd->assoc_data &&
3001 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3002 if (!ifmgd->assoc_data->have_beacon ||
3003 ieee80211_do_assoc(sdata)) {
3004 u8 bssid[ETH_ALEN];
3005
3006 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3007
3008 ieee80211_destroy_assoc_data(sdata, false);
3009
3010 mutex_unlock(&ifmgd->mtx);
3011 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3012 mutex_lock(&ifmgd->mtx);
3013 }
3014 } else if (ifmgd->assoc_data)
3015 run_again(ifmgd, ifmgd->assoc_data->timeout);
3016
b291ba11
JB		 3017 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3018 IEEE80211_STA_CONNECTION_POLL) &&
3019 ifmgd->associated) {
a43abf29 3020 u8 bssid[ETH_ALEN];
72a8a3ed 3021 int max_tries;
a43abf29 3022
0c1ad2ca 3023 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3024
72a8a3ed 3025 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3026 max_tries = max_nullfunc_tries;
72a8a3ed 3027 else
180205bd 3028 max_tries = max_probe_tries;
72a8a3ed 3029
4e5ff376
FF		 3030 /* ACK received for nullfunc probing frame */
3031 if (!ifmgd->probe_send_count)
3032 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3033 else if (ifmgd->nullfunc_failed) {
3034 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3035 mlme_dbg(sdata,
3036 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3037 bssid, ifmgd->probe_send_count,
3038 max_tries);
04ac3c0e
FF		 3039 ieee80211_mgd_probe_ap_send(sdata);
3040 } else {
bdcbd8e0
JB		 3041 mlme_dbg(sdata,
3042 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3043 bssid);
95acac61
JB		 3044 ieee80211_sta_connection_lost(sdata, bssid,
3045 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 3046 }
3047 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3048 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3049 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3050 mlme_dbg(sdata,
3051 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3052 bssid, probe_wait_ms);
95acac61
JB		 3053 ieee80211_sta_connection_lost(sdata, bssid,
3054 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 3055 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3056 mlme_dbg(sdata,
3057 "No probe response from AP %pM after %dms, try %d/%i\n",
3058 bssid, probe_wait_ms,
3059 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3060 ieee80211_mgd_probe_ap_send(sdata);
3061 } else {
b291ba11
JB		 3062 /*
3063 * We actually lost the connection ... or did we?
3064 * Let's make sure!
3065 */
b38afa87
BG		 3066 wiphy_debug(local->hw.wiphy,
3067 "%s: No probe response from AP %pM"
3068 " after %dms, disconnecting.\n",
3069 sdata->name,
180205bd 3070 bssid, probe_wait_ms);
04ac3c0e 3071
95acac61
JB		 3072 ieee80211_sta_connection_lost(sdata, bssid,
3073 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 3074 }
3075 }
3076
77fdaa12 3077 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 3078
3079 mutex_lock(&local->mtx);
3080 ieee80211_recalc_idle(local);
3081 mutex_unlock(&local->mtx);
f0706e82
JB		 3082}
3083
b291ba11
JB		 3084static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3085{
3086 struct ieee80211_sub_if_data *sdata =
3087 (struct ieee80211_sub_if_data *) data;
3088 struct ieee80211_local *local = sdata->local;
3089
3090 if (local->quiescing)
3091 return;
3092
1e4dcd01
JO		 3093 ieee80211_queue_work(&sdata->local->hw,
3094 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3095}
3096
3097static void ieee80211_sta_conn_mon_timer(unsigned long data)
3098{
3099 struct ieee80211_sub_if_data *sdata =
3100 (struct ieee80211_sub_if_data *) data;
3101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3102 struct ieee80211_local *local = sdata->local;
3103
3104 if (local->quiescing)
3105 return;
3106
42935eca 3107 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3108}
3109
3110static void ieee80211_sta_monitor_work(struct work_struct *work)
3111{
3112 struct ieee80211_sub_if_data *sdata =
3113 container_of(work, struct ieee80211_sub_if_data,
3114 u.mgd.monitor_work);
3115
3116 ieee80211_mgd_probe_ap(sdata, false);
3117}
3118
9c6bd790
JB		 3119static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3120{
494f1fe5
EP		 3121 u32 flags;
3122
ad935687 3123 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3124 __ieee80211_stop_poll(sdata);
ad935687 3125
b291ba11 3126 /* let's probe the connection once */
494f1fe5
EP		 3127 flags = sdata->local->hw.flags;
3128 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3129 ieee80211_queue_work(&sdata->local->hw,
3130 &sdata->u.mgd.monitor_work);
b291ba11 3131 /* and do all the other regular work too */
64592c8f 3132 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3133 }
9c6bd790 3134}
f0706e82 3135
5bb644a0
JB		 3136#ifdef CONFIG_PM
3137void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3138{
3139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3140
3141 /*
3142 * we need to use atomic bitops for the running bits
3143 * only because both timers might fire at the same
3144 * time -- the code here is properly synchronised.
3145 */
3146
d1f5b7a3
JB		 3147 cancel_work_sync(&ifmgd->request_smps_work);
3148
0ecfe806 3149 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3150 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3151 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3152 if (del_timer_sync(&ifmgd->timer))
3153 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3154
3155 cancel_work_sync(&ifmgd->chswitch_work);
3156 if (del_timer_sync(&ifmgd->chswitch_timer))
3157 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3158
b291ba11
JB		 3159 /* these will just be re-established on connection */
3160 del_timer_sync(&ifmgd->conn_mon_timer);
3161 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3162}
3163
3164void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3165{
3166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3167
676b58c2
RM		 3168 if (!ifmgd->associated)
3169 return;
3170
95acac61
JB		 3171 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3172 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3173 mutex_lock(&ifmgd->mtx);
3174 if (ifmgd->associated) {
bdcbd8e0
JB		 3175 mlme_dbg(sdata,
3176 "driver requested disconnect after resume\n");
95acac61
JB		 3177 ieee80211_sta_connection_lost(sdata,
3178 ifmgd->associated->bssid,
3179 WLAN_REASON_UNSPECIFIED);
3180 mutex_unlock(&ifmgd->mtx);
3181 return;
3182 }
3183 mutex_unlock(&ifmgd->mtx);
3184 }
3185
5bb644a0
JB		 3186 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3187 add_timer(&ifmgd->timer);
3188 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3189 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3190 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3191
3192 mutex_lock(&sdata->local->mtx);
46090979 3193 ieee80211_restart_sta_timer(sdata);
925e64c3 3194 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3195}
3196#endif
3197
9c6bd790
JB		 3198/* interface setup */
3199void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3200{
46900298 3201 struct ieee80211_if_managed *ifmgd;
988c0f72 3202
46900298 3203 ifmgd = &sdata->u.mgd;
b291ba11 3204 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3205 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3206 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3207 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3208 INIT_WORK(&ifmgd->csa_connection_drop_work,
3209 ieee80211_csa_connection_drop_work);
d1f5b7a3 3210 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3211 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3212 (unsigned long) sdata);
b291ba11
JB		 3213 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3214 (unsigned long) sdata);
3215 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3216 (unsigned long) sdata);
46900298 3217 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3218 (unsigned long) sdata);
9c6bd790 3219
ab1faead 3220 ifmgd->flags = 0;
1478acb3 3221 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3222 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3223 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3224
77fdaa12 3225 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3226
3227 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3228 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3229 else
3230 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3231}
3232
77fdaa12
JB		 3233/* scan finished notification */
3234void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3235{
31ee67a1 3236 struct ieee80211_sub_if_data *sdata;
60f8b39c 3237
77fdaa12
JB		 3238 /* Restart STA timers */
3239 rcu_read_lock();
3240 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3241 ieee80211_restart_sta_timer(sdata);
3242 rcu_read_unlock();
3243}
60f8b39c 3244
77fdaa12
JB		 3245int ieee80211_max_network_latency(struct notifier_block *nb,
3246 unsigned long data, void *dummy)
3247{
3248 s32 latency_usec = (s32) data;
3249 struct ieee80211_local *local =
3250 container_of(nb, struct ieee80211_local,
3251 network_latency_notifier);
1fa6f4af 3252
77fdaa12
JB		 3253 mutex_lock(&local->iflist_mtx);
3254 ieee80211_recalc_ps(local, latency_usec);
3255 mutex_unlock(&local->iflist_mtx);
dfe67012 3256
77fdaa12 3257 return 0;
9c6bd790
JB		 3258}
3259
f2d9d270
JB		 3260static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3261{
3262 u32 ret;
3263 int tmp;
3264
3265 switch (c->width) {
3266 case NL80211_CHAN_WIDTH_20:
3267 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3268 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3269 break;
3270 case NL80211_CHAN_WIDTH_40:
3271 c->width = NL80211_CHAN_WIDTH_20;
3272 c->center_freq1 = c->chan->center_freq;
3273 ret = IEEE80211_STA_DISABLE_40MHZ |
3274 IEEE80211_STA_DISABLE_VHT;
3275 break;
3276 case NL80211_CHAN_WIDTH_80:
3277 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3278 /* n_P40 */
3279 tmp /= 2;
3280 /* freq_P40 */
3281 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3282 c->width = NL80211_CHAN_WIDTH_40;
3283 ret = IEEE80211_STA_DISABLE_VHT;
3284 break;
3285 case NL80211_CHAN_WIDTH_80P80:
3286 c->center_freq2 = 0;
3287 c->width = NL80211_CHAN_WIDTH_80;
3288 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3289 IEEE80211_STA_DISABLE_160MHZ;
3290 break;
3291 case NL80211_CHAN_WIDTH_160:
3292 /* n_P20 */
3293 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3294 /* n_P80 */
3295 tmp /= 4;
3296 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3297 c->width = NL80211_CHAN_WIDTH_80;
3298 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3299 IEEE80211_STA_DISABLE_160MHZ;
3300 break;
3301 default:
3302 case NL80211_CHAN_WIDTH_20_NOHT:
3303 WARN_ON_ONCE(1);
3304 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3305 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3306 break;
3307 }
3308
3309 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3310
3311 return ret;
3312}
3313
3314static u32
3315ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3316 struct ieee80211_supported_band *sband,
3317 struct ieee80211_channel *channel,
3318 const struct ieee80211_ht_operation *ht_oper,
3319 const struct ieee80211_vht_operation *vht_oper,
3320 struct cfg80211_chan_def *chandef)
3321{
3322 struct cfg80211_chan_def vht_chandef;
3323 u32 ht_cfreq, ret;
3324
3325 chandef->chan = channel;
3326 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3327 chandef->center_freq1 = channel->center_freq;
3328 chandef->center_freq2 = 0;
3329
3330 if (!ht_oper || !sband->ht_cap.ht_supported) {
3331 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3332 goto out;
3333 }
3334
3335 chandef->width = NL80211_CHAN_WIDTH_20;
3336
3337 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3338 channel->band);
3339 /* check that channel matches the right operating channel */
3340 if (channel->center_freq != ht_cfreq) {
3341 /*
3342 * It's possible that some APs are confused here;
3343 * Netgear WNDR3700 sometimes reports 4 higher than
3344 * the actual channel in association responses, but
3345 * since we look at probe response/beacon data here
3346 * it should be OK.
3347 */
3348 sdata_info(sdata,
3349 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3350 channel->center_freq, ht_cfreq,
3351 ht_oper->primary_chan, channel->band);
3352 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3353 goto out;
3354 }
3355
3356 /* check 40 MHz support, if we have it */
3357 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3358 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3359 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3360 chandef->width = NL80211_CHAN_WIDTH_40;
3361 chandef->center_freq1 += 10;
3362 break;
3363 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3364 chandef->width = NL80211_CHAN_WIDTH_40;
3365 chandef->center_freq1 -= 10;
3366 break;
3367 }
3368 } else {
3369 /* 40 MHz (and 80 MHz) must be supported for VHT */
3370 ret = IEEE80211_STA_DISABLE_VHT;
3371 goto out;
3372 }
3373
3374 if (!vht_oper || !sband->vht_cap.vht_supported) {
3375 ret = IEEE80211_STA_DISABLE_VHT;
3376 goto out;
3377 }
3378
3379 vht_chandef.chan = channel;
3380 vht_chandef.center_freq1 =
3381 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3382 channel->band);
3383 vht_chandef.center_freq2 = 0;
3384
3385 if (vht_oper->center_freq_seg2_idx)
3386 vht_chandef.center_freq2 =
3387 ieee80211_channel_to_frequency(
3388 vht_oper->center_freq_seg2_idx,
3389 channel->band);
3390
3391 switch (vht_oper->chan_width) {
3392 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3393 vht_chandef.width = chandef->width;
3394 break;
3395 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3396 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3397 break;
3398 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3399 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3400 break;
3401 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3402 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3403 break;
3404 default:
3405 sdata_info(sdata,
3406 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3407 vht_oper->chan_width);
3408 ret = IEEE80211_STA_DISABLE_VHT;
3409 goto out;
3410 }
3411
3412 if (!cfg80211_chandef_valid(&vht_chandef)) {
3413 sdata_info(sdata,
3414 "AP VHT information is invalid, disable VHT\n");
3415 ret = IEEE80211_STA_DISABLE_VHT;
3416 goto out;
3417 }
3418
3419 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3420 ret = 0;
3421 goto out;
3422 }
3423
3424 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3425 sdata_info(sdata,
3426 "AP VHT information doesn't match HT, disable VHT\n");
3427 ret = IEEE80211_STA_DISABLE_VHT;
3428 goto out;
3429 }
3430
3431 *chandef = vht_chandef;
3432
3433 ret = 0;
3434
3435 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3436 IEEE80211_CHAN_DISABLED)) {
3437 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3438 ret = IEEE80211_STA_DISABLE_HT |
3439 IEEE80211_STA_DISABLE_VHT;
3440 goto out;
3441 }
3442
3443 ret = chandef_downgrade(chandef);
3444 }
3445
3446 if (chandef->width != vht_chandef.width)
3447 sdata_info(sdata,
3448 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3449
3450out:
3451 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3452 return ret;
3453}
3454
3455static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3456 struct cfg80211_bss *cbss)
3457{
3458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3459 const u8 *ht_cap_ie, *vht_cap_ie;
3460 const struct ieee80211_ht_cap *ht_cap;
3461 const struct ieee80211_vht_cap *vht_cap;
3462 u8 chains = 1;
3463
3464 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3465 return chains;
3466
9caf0364 3467 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3468 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3469 ht_cap = (void *)(ht_cap_ie + 2);
3470 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3471 /*
3472 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3473 * "Tx Unequal Modulation Supported" fields.
3474 */
3475 }
3476
3477 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3478 return chains;
3479
9caf0364 3480 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3481 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3482 u8 nss;
3483 u16 tx_mcs_map;
3484
3485 vht_cap = (void *)(vht_cap_ie + 2);
3486 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3487 for (nss = 8; nss > 0; nss--) {
3488 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3489 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3490 break;
3491 }
3492 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3493 chains = max(chains, nss);
3494 }
3495
3496 return chains;
3497}
3498
b17166a7
JB		 3499static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3500 struct cfg80211_bss *cbss)
a1cf775d
JB		 3501{
3502 struct ieee80211_local *local = sdata->local;
3503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3504 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3505 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3506 struct ieee80211_supported_band *sband;
4bf88530 3507 struct cfg80211_chan_def chandef;
f2d9d270 3508 int ret;
a1cf775d 3509
24398e39
JB		 3510 sband = local->hw.wiphy->bands[cbss->channel->band];
3511
f2d9d270
JB		 3512 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3513 IEEE80211_STA_DISABLE_80P80MHZ |
3514 IEEE80211_STA_DISABLE_160MHZ);
3515
9caf0364
JB		 3516 rcu_read_lock();
3517
f2d9d270
JB		 3518 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3519 sband->ht_cap.ht_supported) {
3520 const u8 *ht_oper_ie;
24398e39 3521
9caf0364 3522 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3523 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3524 ht_oper = (void *)(ht_oper_ie + 2);
3525 }
3526
f2d9d270
JB		 3527 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3528 sband->vht_cap.vht_supported) {
3529 const u8 *vht_oper_ie;
3530
9caf0364
JB		 3531 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3532 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3533 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3534 vht_oper = (void *)(vht_oper_ie + 2);
3535 if (vht_oper && !ht_oper) {
3536 vht_oper = NULL;
bdcbd8e0 3537 sdata_info(sdata,
f2d9d270
JB		 3538 "AP advertised VHT without HT, disabling both\n");
3539 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3540 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39
JB		 3541 }
3542 }
3543
f2d9d270
JB		 3544 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3545 cbss->channel,
3546 ht_oper, vht_oper,
3547 &chandef);
04ecd257 3548
f2d9d270
JB		 3549 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3550 local->rx_chains);
24398e39 3551
9caf0364
JB		 3552 rcu_read_unlock();
3553
04ecd257
JB		 3554 /* will change later if needed */
3555 sdata->smps_mode = IEEE80211_SMPS_OFF;
3556
f2d9d270
JB		 3557 /*
3558 * If this fails (possibly due to channel context sharing
3559 * on incompatible channels, e.g. 80+80 and 160 sharing the
3560 * same control channel) try to use a smaller bandwidth.
3561 */
3562 ret = ieee80211_vif_use_channel(sdata, &chandef,
3563 IEEE80211_CHANCTX_SHARED);
3564 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3565 ifmgd->flags |= chandef_downgrade(&chandef);
3566 return ret;
b17166a7
JB		 3567}
3568
3569static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3570 struct cfg80211_bss *cbss, bool assoc)
3571{
3572 struct ieee80211_local *local = sdata->local;
3573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3574 struct ieee80211_bss *bss = (void *)cbss->priv;
3575 struct sta_info *new_sta = NULL;
3576 bool have_sta = false;
3577 int err;
3578
3579 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3580 return -EINVAL;
3581
3582 if (assoc) {
3583 rcu_read_lock();
3584 have_sta = sta_info_get(sdata, cbss->bssid);
3585 rcu_read_unlock();
3586 }
3587
3588 if (!have_sta) {
3589 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3590 if (!new_sta)
3591 return -ENOMEM;
3592 }
3593
3594 mutex_lock(&local->mtx);
3595 ieee80211_recalc_idle(sdata->local);
3596 mutex_unlock(&local->mtx);
3597
13e0c8e3 3598 if (new_sta) {
5d6a1b06
JB		 3599 u32 rates = 0, basic_rates = 0;
3600 bool have_higher_than_11mbit;
3601 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3602 struct ieee80211_supported_band *sband;
3603
3604 sband = local->hw.wiphy->bands[cbss->channel->band];
3605
3606 err = ieee80211_prep_channel(sdata, cbss);
3607 if (err) {
3608 sta_info_free(local, new_sta);
3609 return err;
3610 }
5d6a1b06 3611
5d6a1b06
JB		 3612 ieee80211_get_rates(sband, bss->supp_rates,
3613 bss->supp_rates_len,
3614 &rates, &basic_rates,
3615 &have_higher_than_11mbit,
3616 &min_rate, &min_rate_index);
3617
3618 /*
3619 * This used to be a workaround for basic rates missing
3620 * in the association response frame. Now that we no
3621 * longer use the basic rates from there, it probably
3622 * doesn't happen any more, but keep the workaround so
3623 * in case some *other* APs are buggy in different ways
3624 * we can connect -- with a warning.
3625 */
3626 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3627 sdata_info(sdata,
3628 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3629 basic_rates = BIT(min_rate_index);
3630 }
3631
13e0c8e3 3632 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3633 sdata->vif.bss_conf.basic_rates = basic_rates;
3634
3635 /* cf. IEEE 802.11 9.2.12 */
55de908a 3636 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3637 have_higher_than_11mbit)
3638 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3639 else
3640 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3641
3642 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3643
8c358bcd
JB		 3644 /* set timing information */
3645 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3646 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3647 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3648
3649 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3650 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3651 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3652 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3653
3654 if (assoc)
13e0c8e3 3655 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3656
13e0c8e3
JB		 3657 err = sta_info_insert(new_sta);
3658 new_sta = NULL;
a1cf775d 3659 if (err) {
bdcbd8e0
JB		 3660 sdata_info(sdata,
3661 "failed to insert STA entry for the AP (error %d)\n",
3662 err);
a1cf775d
JB		 3663 return err;
3664 }
3665 } else
b203ca39 3666 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3667
3668 return 0;
3669}
3670
77fdaa12
JB		 3671/* config hooks */
3672int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3673 struct cfg80211_auth_request *req)
9c6bd790 3674{
66e67e41
JB		 3675 struct ieee80211_local *local = sdata->local;
3676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3677 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3678 u16 auth_alg;
66e67e41
JB		 3679 int err;
3680
3681 /* prepare auth data structure */
9c6bd790 3682
77fdaa12
JB		 3683 switch (req->auth_type) {
3684 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3685 auth_alg = WLAN_AUTH_OPEN;
3686 break;
3687 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3688 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3689 return -EOPNOTSUPP;
77fdaa12
JB		 3690 auth_alg = WLAN_AUTH_SHARED_KEY;
3691 break;
3692 case NL80211_AUTHTYPE_FT:
3693 auth_alg = WLAN_AUTH_FT;
3694 break;
3695 case NL80211_AUTHTYPE_NETWORK_EAP:
3696 auth_alg = WLAN_AUTH_LEAP;
3697 break;
6b8ece3a
JM		 3698 case NL80211_AUTHTYPE_SAE:
3699 auth_alg = WLAN_AUTH_SAE;
3700 break;
77fdaa12
JB		 3701 default:
3702 return -EOPNOTSUPP;
60f8b39c 3703 }
77fdaa12 3704
6b8ece3a
JM		 3705 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3706 req->ie_len, GFP_KERNEL);
66e67e41 3707 if (!auth_data)
9c6bd790 3708 return -ENOMEM;
77fdaa12 3709
66e67e41 3710 auth_data->bss = req->bss;
77fdaa12 3711
6b8ece3a
JM		 3712 if (req->sae_data_len >= 4) {
3713 __le16 *pos = (__le16 *) req->sae_data;
3714 auth_data->sae_trans = le16_to_cpu(pos[0]);
3715 auth_data->sae_status = le16_to_cpu(pos[1]);
3716 memcpy(auth_data->data, req->sae_data + 4,
3717 req->sae_data_len - 4);
3718 auth_data->data_len += req->sae_data_len - 4;
3719 }
3720
77fdaa12 3721 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3722 memcpy(&auth_data->data[auth_data->data_len],
3723 req->ie, req->ie_len);
3724 auth_data->data_len += req->ie_len;
9c6bd790 3725 }
77fdaa12 3726
fffd0934 3727 if (req->key && req->key_len) {
66e67e41
JB		 3728 auth_data->key_len = req->key_len;
3729 auth_data->key_idx = req->key_idx;
3730 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3731 }
3732
66e67e41 3733 auth_data->algorithm = auth_alg;
60f8b39c 3734
66e67e41 3735 /* try to authenticate/probe */
2a33bee2 3736
66e67e41 3737 mutex_lock(&ifmgd->mtx);
2a33bee2 3738
66e67e41
JB		 3739 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3740 ifmgd->assoc_data) {
3741 err = -EBUSY;
3742 goto err_free;
2a33bee2
GE		 3743 }
3744
66e67e41
JB		 3745 if (ifmgd->auth_data)
3746 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3747
66e67e41
JB		 3748 /* prep auth_data so we don't go into idle on disassoc */
3749 ifmgd->auth_data = auth_data;
af6b6374 3750
66e67e41 3751 if (ifmgd->associated)
37ad3888 3752 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3753
bdcbd8e0 3754 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3755
a1cf775d
JB		 3756 err = ieee80211_prep_connection(sdata, req->bss, false);
3757 if (err)
66e67e41 3758 goto err_clear;
af6b6374 3759
66e67e41
JB		 3760 err = ieee80211_probe_auth(sdata);
3761 if (err) {
66e67e41
JB		 3762 sta_info_destroy_addr(sdata, req->bss->bssid);
3763 goto err_clear;
3764 }
3765
3766 /* hold our own reference */
3767 cfg80211_ref_bss(auth_data->bss);
3768 err = 0;
3769 goto out_unlock;
3770
3771 err_clear:
3d2abdfd
EP		 3772 memset(ifmgd->bssid, 0, ETH_ALEN);
3773 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3774 ifmgd->auth_data = NULL;
3775 err_free:
3776 kfree(auth_data);
3777 out_unlock:
3778 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3779
66e67e41 3780 return err;
af6b6374
JB		 3781}
3782
77fdaa12
JB		 3783int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3784 struct cfg80211_assoc_request *req)
f0706e82 3785{
66e67e41 3786 struct ieee80211_local *local = sdata->local;
77fdaa12 3787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3788 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3789 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3790 struct ieee80211_supported_band *sband;
b08fbbd8 3791 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3792 int i, err;
f0706e82 3793
66e67e41
JB		 3794 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3795 if (!assoc_data)
3796 return -ENOMEM;
3797
9caf0364
JB		 3798 rcu_read_lock();
3799 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3800 if (!ssidie) {
3801 rcu_read_unlock();
3802 kfree(assoc_data);
3803 return -EINVAL;
3804 }
3805 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3806 assoc_data->ssid_len = ssidie[1];
3807 rcu_read_unlock();
3808
77fdaa12 3809 mutex_lock(&ifmgd->mtx);
9c87ba67 3810
66e67e41 3811 if (ifmgd->associated)
37ad3888 3812 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3813
3814 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3815 err = -EBUSY;
3816 goto err_free;
af6b6374 3817 }
77fdaa12 3818
66e67e41
JB		 3819 if (ifmgd->assoc_data) {
3820 err = -EBUSY;
3821 goto err_free;
3822 }
77fdaa12 3823
66e67e41
JB		 3824 if (ifmgd->auth_data) {
3825 bool match;
3826
3827 /* keep sta info, bssid if matching */
b203ca39 3828 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3829 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3830 }
3831
66e67e41 3832 /* prepare assoc data */
19c3b830 3833
d8ec4433
JO		 3834 ifmgd->beacon_crc_valid = false;
3835
de5036aa
JB		 3836 /*
3837 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3838 * We still associate in non-HT mode (11a/b/g) if any one of these
3839 * ciphers is configured as pairwise.
3840 * We can set this to true for non-11n hardware, that'll be checked
3841 * separately along with the peer capabilities.
3842 */
1c4cb928 3843 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3844 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3845 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3846 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3847 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3848 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3849 netdev_info(sdata->dev,
d545daba 3850 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3851 }
3852 }
77fdaa12 3853
d545daba 3854 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3855 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3856 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3857 }
ef96a842 3858
4e74bfdb
JB		 3859 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3860 sband = local->hw.wiphy->bands[req->bss->channel->band];
3861 if (!sband->ht_cap.ht_supported ||
1c4cb928 3862 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3863 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3864 if (!bss->wmm_used)
3865 netdev_info(sdata->dev,
3866 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3867 }
4e74bfdb 3868
d545daba
MP		 3869 /* disable VHT if we don't support it or the AP doesn't use WMM */
3870 if (!sband->vht_cap.vht_supported ||
3871 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3872 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3873 if (!bss->wmm_used)
3874 netdev_info(sdata->dev,
3875 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3876 }
3877
ef96a842
BG		 3878 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3879 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3880 sizeof(ifmgd->ht_capa_mask));
3881
77fdaa12 3882 if (req->ie && req->ie_len) {
66e67e41
JB		 3883 memcpy(assoc_data->ie, req->ie, req->ie_len);
3884 assoc_data->ie_len = req->ie_len;
3885 }
f679f65d 3886
66e67e41 3887 assoc_data->bss = req->bss;
f679f65d 3888
af6b6374
JB		 3889 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3890 if (ifmgd->powersave)
04ecd257 3891 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3892 else
04ecd257 3893 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3894 } else
04ecd257 3895 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3896
66e67e41 3897 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3898 assoc_data->wmm = bss->wmm_used &&
3899 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3900 assoc_data->supp_rates = bss->supp_rates;
3901 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 3902
9caf0364 3903 rcu_read_lock();
9dde6423
JB		 3904 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3905 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3906 assoc_data->ap_ht_param =
3907 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3908 else
a8243b72 3909 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 3910 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3911 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3912 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3913 sizeof(struct ieee80211_vht_cap));
3914 else
3915 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 3916 rcu_read_unlock();
63f170e0 3917
ab13315a
KV		 3918 if (bss->wmm_used && bss->uapsd_supported &&
3919 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3920 assoc_data->uapsd = true;
ab13315a
KV		 3921 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3922 } else {
76f0303d 3923 assoc_data->uapsd = false;
ab13315a
KV		 3924 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3925 }
3926
77fdaa12 3927 if (req->prev_bssid)
66e67e41 3928 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3929
3930 if (req->use_mfp) {
3931 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3932 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3933 } else {
3934 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3935 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3936 }
3937
3938 if (req->crypto.control_port)
3939 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3940 else
3941 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3942
a621fa4d
JB		 3943 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3944 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3945
66e67e41
JB		 3946 /* kick off associate process */
3947
3948 ifmgd->assoc_data = assoc_data;
826262c3 3949 ifmgd->dtim_period = 0;
66e67e41 3950
a1cf775d
JB		 3951 err = ieee80211_prep_connection(sdata, req->bss, true);
3952 if (err)
3953 goto err_clear;
66e67e41 3954
826262c3
JB		 3955 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3956 const struct cfg80211_bss_ies *beacon_ies;
3957
3958 rcu_read_lock();
3959 beacon_ies = rcu_dereference(req->bss->beacon_ies);
3960 if (!beacon_ies) {
3961 /*
3962 * Wait up to one beacon interval ...
3963 * should this be more if we miss one?
3964 */
3965 sdata_info(sdata, "waiting for beacon from %pM\n",
3966 ifmgd->bssid);
3967 assoc_data->timeout =
3968 TU_TO_EXP_TIME(req->bss->beacon_interval);
3969 } else {
3970 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3971 beacon_ies->data,
3972 beacon_ies->len);
3973 if (tim_ie && tim_ie[1] >=
3974 sizeof(struct ieee80211_tim_ie)) {
3975 const struct ieee80211_tim_ie *tim;
3976 tim = (void *)(tim_ie + 2);
3977 ifmgd->dtim_period = tim->dtim_period;
3978 }
3979 assoc_data->have_beacon = true;
3980 assoc_data->sent_assoc = false;
3981 assoc_data->timeout = jiffies;
3982 }
3983 rcu_read_unlock();
66e67e41
JB		 3984 } else {
3985 assoc_data->have_beacon = true;
3986 assoc_data->sent_assoc = false;
3987 assoc_data->timeout = jiffies;
3988 }
3989 run_again(ifmgd, assoc_data->timeout);
3990
fcff4f10
PS		 3991 if (bss->corrupt_data) {
3992 char *corrupt_type = "data";
3993 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3994 if (bss->corrupt_data &
3995 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3996 corrupt_type = "beacon and probe response";
3997 else
3998 corrupt_type = "beacon";
3999 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4000 corrupt_type = "probe response";
bdcbd8e0
JB		 4001 sdata_info(sdata, "associating with AP with corrupt %s\n",
4002 corrupt_type);
fcff4f10
PS		 4003 }
4004
66e67e41
JB		 4005 err = 0;
4006 goto out;
4007 err_clear:
3d2abdfd
EP		 4008 memset(ifmgd->bssid, 0, ETH_ALEN);
4009 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4010 ifmgd->assoc_data = NULL;
4011 err_free:
4012 kfree(assoc_data);
4013 out:
4014 mutex_unlock(&ifmgd->mtx);
4015
4016 return err;
f0706e82
JB		 4017}
4018
77fdaa12 4019int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4020 struct cfg80211_deauth_request *req)
f0706e82 4021{
46900298 4022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4023 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4024 bool tx = !req->local_state_change;
86552017 4025 bool sent_frame = false;
f0706e82 4026
77fdaa12
JB		 4027 mutex_lock(&ifmgd->mtx);
4028
bdcbd8e0
JB		 4029 sdata_info(sdata,
4030 "deauthenticating from %pM by local choice (reason=%d)\n",
4031 req->bssid, req->reason_code);
0ff71613 4032
86552017 4033 if (ifmgd->auth_data) {
8c7d857c 4034 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4035 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4036 IEEE80211_STYPE_DEAUTH,
6863255b 4037 req->reason_code, tx,
37ad3888 4038 frame_buf);
86552017
JB		 4039 ieee80211_destroy_auth_data(sdata, false);
4040 mutex_unlock(&ifmgd->mtx);
4041
4042 sent_frame = tx;
4043 goto out;
8c7d857c
EG		 4044 }
4045
86552017
JB		 4046 if (ifmgd->associated &&
4047 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4048 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4049 req->reason_code, tx, frame_buf);
4050 sent_frame = tx;
4051 }
37ad3888
JB		 4052 mutex_unlock(&ifmgd->mtx);
4053
86552017 4054 out:
7da7cc1d 4055 mutex_lock(&sdata->local->mtx);
bc83b681 4056 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4057 mutex_unlock(&sdata->local->mtx);
bc83b681 4058
86552017
JB		 4059 if (sent_frame)
4060 __cfg80211_send_deauth(sdata->dev, frame_buf,
4061 IEEE80211_DEAUTH_FRAME_LEN);
4062
f0706e82
JB		 4063 return 0;
4064}
84363e6e 4065
77fdaa12 4066int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4067 struct cfg80211_disassoc_request *req)
9c6bd790 4068{
77fdaa12 4069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4070 u8 bssid[ETH_ALEN];
6ae16775 4071 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4072
77fdaa12 4073 mutex_lock(&ifmgd->mtx);
10f644a4 4074
8d8b261a
JB		 4075 /*
4076 * cfg80211 should catch this ... but it's racy since
4077 * we can receive a disassoc frame, process it, hand it
4078 * to cfg80211 while that's in a locked section already
4079 * trying to tell us that the user wants to disconnect.
4080 */
0c1ad2ca 4081 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4082 mutex_unlock(&ifmgd->mtx);
4083 return -ENOLINK;
4084 }
4085
bdcbd8e0
JB		 4086 sdata_info(sdata,
4087 "disassociating from %pM by local choice (reason=%d)\n",
4088 req->bss->bssid, req->reason_code);
0ff71613 4089
e69e95db 4090 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4091 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4092 req->reason_code, !req->local_state_change,
4093 frame_buf);
77fdaa12 4094 mutex_unlock(&ifmgd->mtx);
10f644a4 4095
6ae16775
AQ		 4096 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4097 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4098
7da7cc1d 4099 mutex_lock(&sdata->local->mtx);
bc83b681 4100 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4101 mutex_unlock(&sdata->local->mtx);
bc83b681 4102
10f644a4
JB		 4103 return 0;
4104}
026331c4 4105
afa762f6 4106void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4107{
4108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4109
4110 mutex_lock(&ifmgd->mtx);
4111 if (ifmgd->assoc_data)
4112 ieee80211_destroy_assoc_data(sdata, false);
4113 if (ifmgd->auth_data)
4114 ieee80211_destroy_auth_data(sdata, false);
4115 del_timer_sync(&ifmgd->timer);
4116 mutex_unlock(&ifmgd->mtx);
4117}
4118
a97c13c3
JO		 4119void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4120 enum nl80211_cqm_rssi_threshold_event rssi_event,
4121 gfp_t gfp)
4122{
4123 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4124
b5878a2d
JB		 4125 trace_api_cqm_rssi_notify(sdata, rssi_event);
4126
a97c13c3
JO		 4127 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4128}
4129EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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