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nl80211/cfg80211: add radar detection command/event
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
5bb644a0
JB		 90#define TMR_RUNNING_TIMER 0
91#define TMR_RUNNING_CHANSW 1
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
24398e39
JB		 177static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_operation *ht_oper,
179 const u8 *bssid, bool reconfig)
d5522e03
JB		 180{
181 struct ieee80211_local *local = sdata->local;
182 struct ieee80211_supported_band *sband;
55de908a
JB		 183 struct ieee80211_chanctx_conf *chanctx_conf;
184 struct ieee80211_channel *chan;
d5522e03
JB		 185 struct sta_info *sta;
186 u32 changed = 0;
9ed6bcce 187 u16 ht_opmode;
64f68e5d 188 bool disable_40 = false;
d5522e03 189
55de908a
JB		 190 rcu_read_lock();
191 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
192 if (WARN_ON(!chanctx_conf)) {
193 rcu_read_unlock();
194 return 0;
195 }
4bf88530 196 chan = chanctx_conf->def.chan;
55de908a
JB		 197 rcu_read_unlock();
198 sband = local->hw.wiphy->bands[chan->band];
d5522e03 199
4bf88530
JB		 200 switch (sdata->vif.bss_conf.chandef.width) {
201 case NL80211_CHAN_WIDTH_40:
202 if (sdata->vif.bss_conf.chandef.chan->center_freq >
203 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 204 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d 205 disable_40 = true;
4bf88530
JB		 206 if (sdata->vif.bss_conf.chandef.chan->center_freq <
207 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 208 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 209 disable_40 = true;
210 break;
211 default:
212 break;
213 }
d5522e03 214
24398e39
JB		 215 /* This can change during the lifetime of the BSS */
216 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 217 disable_40 = true;
218
219 mutex_lock(&local->sta_mtx);
220 sta = sta_info_get(sdata, bssid);
d5522e03 221
64f68e5d
JB		 222 WARN_ON_ONCE(!sta);
223
224 if (sta && !sta->supports_40mhz)
225 disable_40 = true;
226
227 if (sta && (!reconfig ||
91a0099c 228 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 229 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 230
64f68e5d
JB		 231 if (disable_40)
232 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
233 else
234 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 235
64f68e5d 236 rate_control_rate_update(local, sband, sta,
8f727ef3 237 IEEE80211_RC_BW_CHANGED);
0aaffa9b 238 }
64f68e5d 239 mutex_unlock(&local->sta_mtx);
d5522e03 240
074d46d1 241 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 242
243 /* if bss configuration changed store the new one */
24398e39 244 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 245 changed |= BSS_CHANGED_HT;
9ed6bcce 246 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 247 }
248
249 return changed;
250}
251
9c6bd790
JB		 252/* frame sending functions */
253
66e67e41
JB		 254static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
255 struct ieee80211_supported_band *sband,
256 u32 *rates)
257{
258 int i, j, count;
259 *rates = 0;
260 count = 0;
261 for (i = 0; i < supp_rates_len; i++) {
262 int rate = (supp_rates[i] & 0x7F) * 5;
263
264 for (j = 0; j < sband->n_bitrates; j++)
265 if (sband->bitrates[j].bitrate == rate) {
266 *rates |= BIT(j);
267 count++;
268 break;
269 }
270 }
271
272 return count;
273}
274
275static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 276 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 277 struct ieee80211_supported_band *sband,
278 struct ieee80211_channel *channel,
279 enum ieee80211_smps_mode smps)
280{
66e67e41
JB		 281 u8 *pos;
282 u32 flags = channel->flags;
283 u16 cap;
284 struct ieee80211_sta_ht_cap ht_cap;
285
286 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
287
66e67e41
JB		 288 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
289 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
290
66e67e41
JB		 291 /* determine capability flags */
292 cap = ht_cap.cap;
293
9dde6423 294 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 295 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
296 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 }
300 break;
301 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
302 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
305 }
306 break;
307 }
308
24398e39
JB		 309 /*
310 * If 40 MHz was disabled associate as though we weren't
311 * capable of 40 MHz -- some broken APs will never fall
312 * back to trying to transmit in 20 MHz.
313 */
314 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
315 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
316 cap &= ~IEEE80211_HT_CAP_SGI_40;
317 }
318
66e67e41
JB		 319 /* set SM PS mode properly */
320 cap &= ~IEEE80211_HT_CAP_SM_PS;
321 switch (smps) {
322 case IEEE80211_SMPS_AUTOMATIC:
323 case IEEE80211_SMPS_NUM_MODES:
324 WARN_ON(1);
325 case IEEE80211_SMPS_OFF:
326 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
327 IEEE80211_HT_CAP_SM_PS_SHIFT;
328 break;
329 case IEEE80211_SMPS_STATIC:
330 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
331 IEEE80211_HT_CAP_SM_PS_SHIFT;
332 break;
333 case IEEE80211_SMPS_DYNAMIC:
334 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
335 IEEE80211_HT_CAP_SM_PS_SHIFT;
336 break;
337 }
338
339 /* reserve and fill IE */
340 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
341 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
342}
343
d545daba
MP		 344static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
345 struct sk_buff *skb,
b08fbbd8
JB		 346 struct ieee80211_supported_band *sband,
347 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 348{
349 u8 *pos;
350 u32 cap;
351 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 352 int i;
d545daba
MP		 353
354 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
355
356 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
357
358 /* determine capability flags */
359 cap = vht_cap.cap;
360
f2d9d270
JB		 361 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
362 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
363 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
364 }
365
366 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
367 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
368 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
369 }
370
b08fbbd8
JB		 371 /*
372 * Some APs apparently get confused if our capabilities are better
373 * than theirs, so restrict what we advertise in the assoc request.
374 */
375 if (!(ap_vht_cap->vht_cap_info &
376 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
377 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
378
379 if (!(ap_vht_cap->vht_cap_info &
380 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
381 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
382 IEEE80211_VHT_CAP_RXSTBC_3 |
383 IEEE80211_VHT_CAP_RXSTBC_4);
384
385 for (i = 0; i < 8; i++) {
386 int shift = i * 2;
387 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
388 u16 ap_mcs, our_mcs;
389
390 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
391 mask) >> shift;
392 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
393 mask) >> shift;
394
395 switch (ap_mcs) {
396 default:
397 if (our_mcs <= ap_mcs)
398 break;
399 /* fall through */
400 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
401 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
402 vht_cap.vht_mcs.rx_mcs_map |=
403 cpu_to_le16(ap_mcs << shift);
404 }
405 }
406
d545daba 407 /* reserve and fill IE */
d4950281 408 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 409 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
410}
411
66e67e41
JB		 412static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
413{
414 struct ieee80211_local *local = sdata->local;
415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
416 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
417 struct sk_buff *skb;
418 struct ieee80211_mgmt *mgmt;
419 u8 *pos, qos_info;
420 size_t offset = 0, noffset;
421 int i, count, rates_len, supp_rates_len;
422 u16 capab;
423 struct ieee80211_supported_band *sband;
55de908a
JB		 424 struct ieee80211_chanctx_conf *chanctx_conf;
425 struct ieee80211_channel *chan;
66e67e41 426 u32 rates = 0;
66e67e41
JB		 427
428 lockdep_assert_held(&ifmgd->mtx);
429
55de908a
JB		 430 rcu_read_lock();
431 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
432 if (WARN_ON(!chanctx_conf)) {
433 rcu_read_unlock();
434 return;
435 }
4bf88530 436 chan = chanctx_conf->def.chan;
55de908a
JB		 437 rcu_read_unlock();
438 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 439
440 if (assoc_data->supp_rates_len) {
441 /*
442 * Get all rates supported by the device and the AP as
443 * some APs don't like getting a superset of their rates
444 * in the association request (e.g. D-Link DAP 1353 in
445 * b-only mode)...
446 */
447 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
448 assoc_data->supp_rates_len,
449 sband, &rates);
450 } else {
451 /*
452 * In case AP not provide any supported rates information
453 * before association, we send information element(s) with
454 * all rates that we support.
455 */
456 rates = ~0;
457 rates_len = sband->n_bitrates;
458 }
459
460 skb = alloc_skb(local->hw.extra_tx_headroom +
461 sizeof(*mgmt) + /* bit too much but doesn't matter */
462 2 + assoc_data->ssid_len + /* SSID */
463 4 + rates_len + /* (extended) rates */
464 4 + /* power capability */
465 2 + 2 * sband->n_channels + /* supported channels */
466 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 467 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 468 assoc_data->ie_len + /* extra IEs */
469 9, /* WMM */
470 GFP_KERNEL);
471 if (!skb)
472 return;
473
474 skb_reserve(skb, local->hw.extra_tx_headroom);
475
476 capab = WLAN_CAPABILITY_ESS;
477
478 if (sband->band == IEEE80211_BAND_2GHZ) {
479 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
480 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
481 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
482 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
483 }
484
485 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
486 capab |= WLAN_CAPABILITY_PRIVACY;
487
488 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
489 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
490 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
491
492 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
493 memset(mgmt, 0, 24);
494 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
495 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
496 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
497
498 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
499 skb_put(skb, 10);
500 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
501 IEEE80211_STYPE_REASSOC_REQ);
502 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
503 mgmt->u.reassoc_req.listen_interval =
504 cpu_to_le16(local->hw.conf.listen_interval);
505 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
506 ETH_ALEN);
507 } else {
508 skb_put(skb, 4);
509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
510 IEEE80211_STYPE_ASSOC_REQ);
511 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
512 mgmt->u.assoc_req.listen_interval =
513 cpu_to_le16(local->hw.conf.listen_interval);
514 }
515
516 /* SSID */
517 pos = skb_put(skb, 2 + assoc_data->ssid_len);
518 *pos++ = WLAN_EID_SSID;
519 *pos++ = assoc_data->ssid_len;
520 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
521
522 /* add all rates which were marked to be used above */
523 supp_rates_len = rates_len;
524 if (supp_rates_len > 8)
525 supp_rates_len = 8;
526
527 pos = skb_put(skb, supp_rates_len + 2);
528 *pos++ = WLAN_EID_SUPP_RATES;
529 *pos++ = supp_rates_len;
530
531 count = 0;
532 for (i = 0; i < sband->n_bitrates; i++) {
533 if (BIT(i) & rates) {
534 int rate = sband->bitrates[i].bitrate;
535 *pos++ = (u8) (rate / 5);
536 if (++count == 8)
537 break;
538 }
539 }
540
541 if (rates_len > count) {
542 pos = skb_put(skb, rates_len - count + 2);
543 *pos++ = WLAN_EID_EXT_SUPP_RATES;
544 *pos++ = rates_len - count;
545
546 for (i++; i < sband->n_bitrates; i++) {
547 if (BIT(i) & rates) {
548 int rate = sband->bitrates[i].bitrate;
549 *pos++ = (u8) (rate / 5);
550 }
551 }
552 }
553
554 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
555 /* 1. power capabilities */
556 pos = skb_put(skb, 4);
557 *pos++ = WLAN_EID_PWR_CAPABILITY;
558 *pos++ = 2;
559 *pos++ = 0; /* min tx power */
55de908a 560 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 561
562 /* 2. supported channels */
563 /* TODO: get this in reg domain format */
564 pos = skb_put(skb, 2 * sband->n_channels + 2);
565 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
566 *pos++ = 2 * sband->n_channels;
567 for (i = 0; i < sband->n_channels; i++) {
568 *pos++ = ieee80211_frequency_to_channel(
569 sband->channels[i].center_freq);
570 *pos++ = 1; /* one channel in the subband*/
571 }
572 }
573
574 /* if present, add any custom IEs that go before HT */
575 if (assoc_data->ie_len && assoc_data->ie) {
576 static const u8 before_ht[] = {
577 WLAN_EID_SSID,
578 WLAN_EID_SUPP_RATES,
579 WLAN_EID_EXT_SUPP_RATES,
580 WLAN_EID_PWR_CAPABILITY,
581 WLAN_EID_SUPPORTED_CHANNELS,
582 WLAN_EID_RSN,
583 WLAN_EID_QOS_CAPA,
584 WLAN_EID_RRM_ENABLED_CAPABILITIES,
585 WLAN_EID_MOBILITY_DOMAIN,
586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
587 };
588 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
589 before_ht, ARRAY_SIZE(before_ht),
590 offset);
591 pos = skb_put(skb, noffset - offset);
592 memcpy(pos, assoc_data->ie + offset, noffset - offset);
593 offset = noffset;
594 }
595
f2d9d270
JB		 596 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
597 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
599
a8243b72 600 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 601 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 602 sband, chan, sdata->smps_mode);
66e67e41 603
d545daba 604 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 605 ieee80211_add_vht_ie(sdata, skb, sband,
606 &assoc_data->ap_vht_cap);
d545daba 607
66e67e41
JB		 608 /* if present, add any custom non-vendor IEs that go after HT */
609 if (assoc_data->ie_len && assoc_data->ie) {
610 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
611 assoc_data->ie_len,
612 offset);
613 pos = skb_put(skb, noffset - offset);
614 memcpy(pos, assoc_data->ie + offset, noffset - offset);
615 offset = noffset;
616 }
617
76f0303d
JB		 618 if (assoc_data->wmm) {
619 if (assoc_data->uapsd) {
dc41e4d4
EP		 620 qos_info = ifmgd->uapsd_queues;
621 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 622 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
623 } else {
624 qos_info = 0;
625 }
626
627 pos = skb_put(skb, 9);
628 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
629 *pos++ = 7; /* len */
630 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
631 *pos++ = 0x50;
632 *pos++ = 0xf2;
633 *pos++ = 2; /* WME */
634 *pos++ = 0; /* WME info */
635 *pos++ = 1; /* WME ver */
636 *pos++ = qos_info;
637 }
638
639 /* add any remaining custom (i.e. vendor specific here) IEs */
640 if (assoc_data->ie_len && assoc_data->ie) {
641 noffset = assoc_data->ie_len;
642 pos = skb_put(skb, noffset - offset);
643 memcpy(pos, assoc_data->ie + offset, noffset - offset);
644 }
645
a1845fc7
JB		 646 drv_mgd_prepare_tx(local, sdata);
647
66e67e41 648 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 649 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
651 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 652 ieee80211_tx_skb(sdata, skb);
653}
654
572e0012
KV		 655void ieee80211_send_pspoll(struct ieee80211_local *local,
656 struct ieee80211_sub_if_data *sdata)
657{
572e0012
KV		 658 struct ieee80211_pspoll *pspoll;
659 struct sk_buff *skb;
572e0012 660
d8cd189e
KV		 661 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
662 if (!skb)
572e0012 663 return;
572e0012 664
d8cd189e
KV		 665 pspoll = (struct ieee80211_pspoll *) skb->data;
666 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 667
62ae67be
JB		 668 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
669 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 670}
671
965bedad
JB		 672void ieee80211_send_nullfunc(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
674 int powersave)
675{
676 struct sk_buff *skb;
d8cd189e 677 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 679
d8cd189e
KV		 680 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
681 if (!skb)
965bedad 682 return;
965bedad 683
d8cd189e 684 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 685 if (powersave)
d8cd189e 686 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 687
6c17b77b
SF		 688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
689 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 690 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
691 IEEE80211_STA_CONNECTION_POLL))
692 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
693
62ae67be 694 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 695}
696
d524215f
FF		 697static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
698 struct ieee80211_sub_if_data *sdata)
699{
700 struct sk_buff *skb;
701 struct ieee80211_hdr *nullfunc;
702 __le16 fc;
703
704 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
705 return;
706
707 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 708 if (!skb)
d524215f 709 return;
d15b8459 710
d524215f
FF		 711 skb_reserve(skb, local->hw.extra_tx_headroom);
712
713 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
714 memset(nullfunc, 0, 30);
715 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
716 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
717 nullfunc->frame_control = fc;
718 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
719 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
720 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
721 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
722
723 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
724 ieee80211_tx_skb(sdata, skb);
725}
726
cc32abd4
JB		 727/* spectrum management related things */
728static void ieee80211_chswitch_work(struct work_struct *work)
729{
730 struct ieee80211_sub_if_data *sdata =
731 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
733
9607e6b6 734 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 735 return;
736
77fdaa12
JB		 737 mutex_lock(&ifmgd->mtx);
738 if (!ifmgd->associated)
739 goto out;
cc32abd4 740
55de908a 741 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 742 if (!sdata->local->ops->channel_switch) {
743 /* call "hw_config" only if doing sw channel switch */
744 ieee80211_hw_config(sdata->local,
745 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 746 } else {
747 /* update the device channel directly */
55de908a 748 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 749 }
77fdaa12 750
cc32abd4 751 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 752 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 753
57eebdf3 754 /* XXX: wait for a beacon first? */
cc32abd4
JB		 755 ieee80211_wake_queues_by_reason(&sdata->local->hw,
756 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 757 out:
758 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
759 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 760}
761
5ce6e438
JB		 762void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
763{
55de908a
JB		 764 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 766
767 trace_api_chswitch_done(sdata, success);
768 if (!success) {
882a7c69
JB		 769 sdata_info(sdata,
770 "driver channel switch failed, disconnecting\n");
771 ieee80211_queue_work(&sdata->local->hw,
772 &ifmgd->csa_connection_drop_work);
773 } else {
774 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 775 }
5ce6e438
JB		 776}
777EXPORT_SYMBOL(ieee80211_chswitch_done);
778
cc32abd4
JB		 779static void ieee80211_chswitch_timer(unsigned long data)
780{
781 struct ieee80211_sub_if_data *sdata =
782 (struct ieee80211_sub_if_data *) data;
783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
784
5bb644a0
JB		 785 if (sdata->local->quiescing) {
786 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
787 return;
788 }
789
42935eca 790 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 791}
792
793void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
794 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 795 struct ieee80211_bss *bss,
796 u64 timestamp)
cc32abd4 797{
0c1ad2ca
JB		 798 struct cfg80211_bss *cbss =
799 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 800 struct ieee80211_channel *new_ch;
801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 802 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
803 cbss->channel->band);
55de908a 804 struct ieee80211_chanctx *chanctx;
cc32abd4 805
77fdaa12
JB		 806 ASSERT_MGD_MTX(ifmgd);
807
808 if (!ifmgd->associated)
cc32abd4
JB		 809 return;
810
fbe9c429 811 if (sdata->local->scanning)
cc32abd4
JB		 812 return;
813
814 /* Disregard subsequent beacons if we are already running a timer
815 processing a CSA */
816
817 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
818 return;
819
820 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 821 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
822 sdata_info(sdata,
823 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
824 ifmgd->associated->bssid, new_freq);
825 ieee80211_queue_work(&sdata->local->hw,
826 &ifmgd->csa_connection_drop_work);
cc32abd4 827 return;
882a7c69 828 }
cc32abd4 829
57eebdf3
JB		 830 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
831
55de908a
JB		 832 if (sdata->local->use_chanctx) {
833 sdata_info(sdata,
834 "not handling channel switch with channel contexts\n");
835 ieee80211_queue_work(&sdata->local->hw,
836 &ifmgd->csa_connection_drop_work);
246dc3fd 837 return;
55de908a
JB		 838 }
839
840 mutex_lock(&sdata->local->chanctx_mtx);
841 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
842 mutex_unlock(&sdata->local->chanctx_mtx);
843 return;
844 }
845 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
846 struct ieee80211_chanctx, conf);
847 if (chanctx->refcount > 1) {
848 sdata_info(sdata,
849 "channel switch with multiple interfaces on the same channel, disconnecting\n");
850 ieee80211_queue_work(&sdata->local->hw,
851 &ifmgd->csa_connection_drop_work);
852 mutex_unlock(&sdata->local->chanctx_mtx);
853 return;
854 }
855 mutex_unlock(&sdata->local->chanctx_mtx);
856
857 sdata->local->csa_channel = new_ch;
858
57eebdf3
JB		 859 if (sw_elem->mode)
860 ieee80211_stop_queues_by_reason(&sdata->local->hw,
861 IEEE80211_QUEUE_STOP_REASON_CSA);
862
5ce6e438
JB		 863 if (sdata->local->ops->channel_switch) {
864 /* use driver's channel switch callback */
57eebdf3
JB		 865 struct ieee80211_channel_switch ch_switch = {
866 .timestamp = timestamp,
867 .block_tx = sw_elem->mode,
868 .channel = new_ch,
869 .count = sw_elem->count,
870 };
871
5ce6e438
JB		 872 drv_channel_switch(sdata->local, &ch_switch);
873 return;
874 }
875
876 /* channel switch handled in software */
57eebdf3 877 if (sw_elem->count <= 1)
42935eca 878 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 879 else
cc32abd4 880 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 881 TU_TO_EXP_TIME(sw_elem->count *
882 cbss->beacon_interval));
cc32abd4
JB		 883}
884
1ea6f9c0
JB		 885static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
886 struct ieee80211_channel *channel,
887 const u8 *country_ie, u8 country_ie_len,
888 const u8 *pwr_constr_elem)
cc32abd4 889{
04b7b2ff
JB		 890 struct ieee80211_country_ie_triplet *triplet;
891 int chan = ieee80211_frequency_to_channel(channel->center_freq);
892 int i, chan_pwr, chan_increment, new_ap_level;
893 bool have_chan_pwr = false;
cc32abd4 894
04b7b2ff
JB		 895 /* Invalid IE */
896 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 897 return 0;
cc32abd4 898
04b7b2ff
JB		 899 triplet = (void *)(country_ie + 3);
900 country_ie_len -= 3;
901
902 switch (channel->band) {
903 default:
904 WARN_ON_ONCE(1);
905 /* fall through */
906 case IEEE80211_BAND_2GHZ:
907 case IEEE80211_BAND_60GHZ:
908 chan_increment = 1;
909 break;
910 case IEEE80211_BAND_5GHZ:
911 chan_increment = 4;
912 break;
cc32abd4 913 }
04b7b2ff
JB		 914
915 /* find channel */
916 while (country_ie_len >= 3) {
917 u8 first_channel = triplet->chans.first_channel;
918
919 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
920 goto next;
921
922 for (i = 0; i < triplet->chans.num_channels; i++) {
923 if (first_channel + i * chan_increment == chan) {
924 have_chan_pwr = true;
925 chan_pwr = triplet->chans.max_power;
926 break;
927 }
928 }
929 if (have_chan_pwr)
930 break;
931
932 next:
933 triplet++;
934 country_ie_len -= 3;
935 }
936
937 if (!have_chan_pwr)
1ea6f9c0 938 return 0;
04b7b2ff
JB		 939
940 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
941
1ea6f9c0
JB		 942 if (sdata->ap_power_level == new_ap_level)
943 return 0;
04b7b2ff
JB		 944
945 sdata_info(sdata,
946 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
947 new_ap_level, chan_pwr, *pwr_constr_elem,
948 sdata->u.mgd.bssid);
1ea6f9c0
JB		 949 sdata->ap_power_level = new_ap_level;
950 if (__ieee80211_recalc_txpower(sdata))
951 return BSS_CHANGED_TXPOWER;
952 return 0;
cc32abd4
JB		 953}
954
965bedad
JB		 955/* powersave */
956static void ieee80211_enable_ps(struct ieee80211_local *local,
957 struct ieee80211_sub_if_data *sdata)
958{
959 struct ieee80211_conf *conf = &local->hw.conf;
960
d5edaedc
JB		 961 /*
962 * If we are scanning right now then the parameters will
963 * take effect when scan finishes.
964 */
fbe9c429 965 if (local->scanning)
d5edaedc
JB		 966 return;
967
965bedad
JB		 968 if (conf->dynamic_ps_timeout > 0 &&
969 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
970 mod_timer(&local->dynamic_ps_timer, jiffies +
971 msecs_to_jiffies(conf->dynamic_ps_timeout));
972 } else {
973 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
974 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 975
2a13052f
JO		 976 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
977 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
978 return;
979
980 conf->flags |= IEEE80211_CONF_PS;
981 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 982 }
983}
984
985static void ieee80211_change_ps(struct ieee80211_local *local)
986{
987 struct ieee80211_conf *conf = &local->hw.conf;
988
989 if (local->ps_sdata) {
965bedad
JB		 990 ieee80211_enable_ps(local, local->ps_sdata);
991 } else if (conf->flags & IEEE80211_CONF_PS) {
992 conf->flags &= ~IEEE80211_CONF_PS;
993 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
994 del_timer_sync(&local->dynamic_ps_timer);
995 cancel_work_sync(&local->dynamic_ps_enable_work);
996 }
997}
998
808118cb
JY		 999static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1000{
1001 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1002 struct sta_info *sta = NULL;
c2c98fde 1003 bool authorized = false;
808118cb
JY		 1004
1005 if (!mgd->powersave)
1006 return false;
1007
05cb9108
JB		 1008 if (mgd->broken_ap)
1009 return false;
1010
808118cb
JY		 1011 if (!mgd->associated)
1012 return false;
1013
808118cb
JY		 1014 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1015 IEEE80211_STA_CONNECTION_POLL))
1016 return false;
1017
1018 rcu_read_lock();
1019 sta = sta_info_get(sdata, mgd->bssid);
1020 if (sta)
c2c98fde 1021 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1022 rcu_read_unlock();
1023
c2c98fde 1024 return authorized;
808118cb
JY		 1025}
1026
965bedad 1027/* need to hold RTNL or interface lock */
10f644a4 1028void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1029{
1030 struct ieee80211_sub_if_data *sdata, *found = NULL;
1031 int count = 0;
195e294d 1032 int timeout;
965bedad
JB		 1033
1034 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1035 local->ps_sdata = NULL;
1036 return;
1037 }
1038
1039 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1040 if (!ieee80211_sdata_running(sdata))
965bedad 1041 continue;
8c7914de
RM		 1042 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1043 /* If an AP vif is found, then disable PS
1044 * by setting the count to zero thereby setting
1045 * ps_sdata to NULL.
1046 */
1047 count = 0;
1048 break;
1049 }
965bedad
JB		 1050 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1051 continue;
1052 found = sdata;
1053 count++;
1054 }
1055
808118cb 1056 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1057 s32 beaconint_us;
1058
1059 if (latency < 0)
ed77134b 1060 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1061
1062 beaconint_us = ieee80211_tu_to_usec(
1063 found->vif.bss_conf.beacon_int);
1064
ff616381 1065 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1066 if (timeout < 0) {
1067 /*
ff616381
JO		 1068 * Go to full PSM if the user configures a very low
1069 * latency requirement.
0ab82b04
EP		 1070 * The 2000 second value is there for compatibility
1071 * until the PM_QOS_NETWORK_LATENCY is configured
1072 * with real values.
195e294d 1073 */
0ab82b04
EP		 1074 if (latency > (1900 * USEC_PER_MSEC) &&
1075 latency != (2000 * USEC_PER_SEC))
195e294d 1076 timeout = 0;
ff616381
JO		 1077 else
1078 timeout = 100;
195e294d 1079 }
09b85568 1080 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1081
04fe2037 1082 if (beaconint_us > latency) {
10f644a4 1083 local->ps_sdata = NULL;
04fe2037 1084 } else {
04fe2037 1085 int maxslp = 1;
826262c3 1086 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1087
1088 /* If the TIM IE is invalid, pretend the value is 1 */
1089 if (!dtimper)
1090 dtimper = 1;
1091 else if (dtimper > 1)
04fe2037
JB		 1092 maxslp = min_t(int, dtimper,
1093 latency / beaconint_us);
1094
9ccebe61 1095 local->hw.conf.max_sleep_period = maxslp;
56007a02 1096 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1097 local->ps_sdata = found;
04fe2037 1098 }
10f644a4 1099 } else {
965bedad 1100 local->ps_sdata = NULL;
10f644a4 1101 }
965bedad
JB		 1102
1103 ieee80211_change_ps(local);
1104}
1105
ab095877
EP		 1106void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1107{
1108 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1109
1110 if (sdata->vif.bss_conf.ps != ps_allowed) {
1111 sdata->vif.bss_conf.ps = ps_allowed;
1112 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1113 }
1114}
1115
965bedad
JB		 1116void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1117{
1118 struct ieee80211_local *local =
1119 container_of(work, struct ieee80211_local,
1120 dynamic_ps_disable_work);
1121
1122 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1123 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1124 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1125 }
1126
1127 ieee80211_wake_queues_by_reason(&local->hw,
1128 IEEE80211_QUEUE_STOP_REASON_PS);
1129}
1130
1131void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1132{
1133 struct ieee80211_local *local =
1134 container_of(work, struct ieee80211_local,
1135 dynamic_ps_enable_work);
1136 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1137 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1138 unsigned long flags;
1139 int q;
965bedad
JB		 1140
1141 /* can only happen when PS was just disabled anyway */
1142 if (!sdata)
1143 return;
1144
5e34069c
CL		 1145 ifmgd = &sdata->u.mgd;
1146
965bedad
JB		 1147 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1148 return;
1149
09b85568 1150 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1151 /* don't enter PS if TX frames are pending */
1152 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1153 mod_timer(&local->dynamic_ps_timer, jiffies +
1154 msecs_to_jiffies(
1155 local->hw.conf.dynamic_ps_timeout));
1156 return;
1157 }
77b7023a
AN		 1158
1159 /*
1160 * transmission can be stopped by others which leads to
1161 * dynamic_ps_timer expiry. Postpone the ps timer if it
1162 * is not the actual idle state.
1163 */
1164 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1165 for (q = 0; q < local->hw.queues; q++) {
1166 if (local->queue_stop_reasons[q]) {
1167 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1168 flags);
1169 mod_timer(&local->dynamic_ps_timer, jiffies +
1170 msecs_to_jiffies(
1171 local->hw.conf.dynamic_ps_timeout));
1172 return;
1173 }
1174 }
1175 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1176 }
1ddc2867 1177
375177bf 1178 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1179 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1180 netif_tx_stop_all_queues(sdata->dev);
965bedad 1181
e8306f98
VN		 1182 if (drv_tx_frames_pending(local))
1183 mod_timer(&local->dynamic_ps_timer, jiffies +
1184 msecs_to_jiffies(
1185 local->hw.conf.dynamic_ps_timeout));
1186 else {
1187 ieee80211_send_nullfunc(local, sdata, 1);
1188 /* Flush to get the tx status of nullfunc frame */
1189 drv_flush(local, false);
1190 }
f3e85b9e
VN		 1191 }
1192
2a13052f
JO		 1193 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1194 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1195 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1196 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1197 local->hw.conf.flags |= IEEE80211_CONF_PS;
1198 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1199 }
f3e85b9e 1200
77b7023a
AN		 1201 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1202 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1203}
1204
1205void ieee80211_dynamic_ps_timer(unsigned long data)
1206{
1207 struct ieee80211_local *local = (void *) data;
1208
78f1a8b7 1209 if (local->quiescing || local->suspended)
5bb644a0
JB		 1210 return;
1211
42935eca 1212 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1213}
1214
60f8b39c 1215/* MLME */
7d25745d 1216static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1217 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1218 u8 *wmm_param, size_t wmm_param_len)
1219{
f0706e82 1220 struct ieee80211_tx_queue_params params;
4ced3f74 1221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1222 size_t left;
1223 int count;
ab13315a 1224 u8 *pos, uapsd_queues = 0;
f0706e82 1225
e1b3ec1a 1226 if (!local->ops->conf_tx)
7d25745d 1227 return false;
e1b3ec1a 1228
32c5057b 1229 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1230 return false;
3434fbd3
JB		 1231
1232 if (!wmm_param)
7d25745d 1233 return false;
3434fbd3 1234
f0706e82 1235 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1236 return false;
ab13315a
KV		 1237
1238 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1239 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1240
f0706e82 1241 count = wmm_param[6] & 0x0f;
46900298 1242 if (count == ifmgd->wmm_last_param_set)
7d25745d 1243 return false;
46900298 1244 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1245
1246 pos = wmm_param + 8;
1247 left = wmm_param_len - 8;
1248
1249 memset(&params, 0, sizeof(params));
1250
00e96dec 1251 sdata->wmm_acm = 0;
f0706e82
JB		 1252 for (; left >= 4; left -= 4, pos += 4) {
1253 int aci = (pos[0] >> 5) & 0x03;
1254 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1255 bool uapsd = false;
f0706e82
JB		 1256 int queue;
1257
1258 switch (aci) {
0eeb59fe 1259 case 1: /* AC_BK */
e100bb64 1260 queue = 3;
988c0f72 1261 if (acm)
00e96dec 1262 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1263 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1264 uapsd = true;
f0706e82 1265 break;
0eeb59fe 1266 case 2: /* AC_VI */
e100bb64 1267 queue = 1;
988c0f72 1268 if (acm)
00e96dec 1269 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1270 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1271 uapsd = true;
f0706e82 1272 break;
0eeb59fe 1273 case 3: /* AC_VO */
e100bb64 1274 queue = 0;
988c0f72 1275 if (acm)
00e96dec 1276 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1277 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1278 uapsd = true;
f0706e82 1279 break;
0eeb59fe 1280 case 0: /* AC_BE */
f0706e82 1281 default:
e100bb64 1282 queue = 2;
988c0f72 1283 if (acm)
00e96dec 1284 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1285 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1286 uapsd = true;
f0706e82
JB		 1287 break;
1288 }
1289
1290 params.aifs = pos[0] & 0x0f;
1291 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1292 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1293 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1294 params.uapsd = uapsd;
1295
bdcbd8e0
JB		 1296 mlme_dbg(sdata,
1297 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1298 queue, aci, acm,
1299 params.aifs, params.cw_min, params.cw_max,
1300 params.txop, params.uapsd);
f6f3def3
EP		 1301 sdata->tx_conf[queue] = params;
1302 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1303 sdata_err(sdata,
1304 "failed to set TX queue parameters for queue %d\n",
1305 queue);
f0706e82 1306 }
e1b3ec1a
SG		 1307
1308 /* enable WMM or activate new settings */
4ced3f74 1309 sdata->vif.bss_conf.qos = true;
7d25745d 1310 return true;
f0706e82
JB		 1311}
1312
925e64c3
SG		 1313static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1314{
1315 lockdep_assert_held(&sdata->local->mtx);
1316
1317 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1318 IEEE80211_STA_BEACON_POLL);
1319 ieee80211_run_deferred_scan(sdata->local);
1320}
1321
1322static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1323{
1324 mutex_lock(&sdata->local->mtx);
1325 __ieee80211_stop_poll(sdata);
1326 mutex_unlock(&sdata->local->mtx);
1327}
1328
7a5158ef
JB		 1329static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1330 u16 capab, bool erp_valid, u8 erp)
5628221c 1331{
bda3933a 1332 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1333 u32 changed = 0;
7a5158ef
JB		 1334 bool use_protection;
1335 bool use_short_preamble;
1336 bool use_short_slot;
1337
1338 if (erp_valid) {
1339 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1340 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1341 } else {
1342 use_protection = false;
1343 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1344 }
1345
1346 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1347 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1348 use_short_slot = true;
5628221c 1349
471b3efd 1350 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1351 bss_conf->use_cts_prot = use_protection;
1352 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1353 }
7e9ed188 1354
d43c7b37 1355 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1356 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1357 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1358 }
d9430a32 1359
7a5158ef 1360 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1361 bss_conf->use_short_slot = use_short_slot;
1362 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1363 }
1364
1365 return changed;
1366}
1367
f698d856 1368static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1369 struct cfg80211_bss *cbss,
ae5eb026 1370 u32 bss_info_changed)
f0706e82 1371{
0c1ad2ca 1372 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1373 struct ieee80211_local *local = sdata->local;
68542962 1374 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1375
ae5eb026 1376 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1377 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1378 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1379
7ccc8bd7
FF		 1380 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1381 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1382
0c1ad2ca
JB		 1383 sdata->u.mgd.associated = cbss;
1384 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1385
17e4ec14
JM		 1386 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1387
488dd7b5 1388 if (sdata->vif.p2p) {
9caf0364 1389 const struct cfg80211_bss_ies *ies;
488dd7b5 1390
9caf0364
JB		 1391 rcu_read_lock();
1392 ies = rcu_dereference(cbss->ies);
1393 if (ies) {
1394 u8 noa[2];
1395 int ret;
1396
1397 ret = cfg80211_get_p2p_attr(
1398 ies->data, ies->len,
1399 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1400 noa, sizeof(noa));
1401 if (ret >= 2) {
1402 bss_conf->p2p_oppps = noa[1] & 0x80;
1403 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1404 bss_info_changed |= BSS_CHANGED_P2P_PS;
1405 sdata->u.mgd.p2p_noa_index = noa[0];
1406 }
488dd7b5 1407 }
9caf0364 1408 rcu_read_unlock();
488dd7b5
JB		 1409 }
1410
b291ba11 1411 /* just to be sure */
925e64c3 1412 ieee80211_stop_poll(sdata);
b291ba11 1413
9ac19a90 1414 ieee80211_led_assoc(local, 1);
9306102e 1415
c65dd147 1416 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1417 /*
1418 * If the AP is buggy we may get here with no DTIM period
1419 * known, so assume it's 1 which is the only safe assumption
1420 * in that case, although if the TIM IE is broken powersave
1421 * probably just won't work at all.
1422 */
1423 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1424 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1425 } else {
e5b900d2 1426 bss_conf->dtim_period = 0;
826262c3 1427 }
e5b900d2 1428
68542962 1429 bss_conf->assoc = 1;
9cef8737 1430
a97c13c3 1431 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1432 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1433 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1434 bss_info_changed |= BSS_CHANGED_CQM;
1435
68542962 1436 /* Enable ARP filtering */
0f19b41e 1437 if (bss_conf->arp_addr_cnt)
68542962 1438 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1439
ae5eb026 1440 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1441
056508dc
JB		 1442 mutex_lock(&local->iflist_mtx);
1443 ieee80211_recalc_ps(local, -1);
1444 mutex_unlock(&local->iflist_mtx);
e0cb686f 1445
04ecd257 1446 ieee80211_recalc_smps(sdata);
ab095877
EP		 1447 ieee80211_recalc_ps_vif(sdata);
1448
8a5b33f5 1449 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1450 netif_carrier_on(sdata->dev);
f0706e82
JB		 1451}
1452
e69e95db 1453static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1454 u16 stype, u16 reason, bool tx,
1455 u8 *frame_buf)
aa458d17 1456{
46900298 1457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1458 struct ieee80211_local *local = sdata->local;
3cc5240b 1459 u32 changed = 0;
aa458d17 1460
77fdaa12
JB		 1461 ASSERT_MGD_MTX(ifmgd);
1462
37ad3888
JB		 1463 if (WARN_ON_ONCE(tx && !frame_buf))
1464 return;
1465
b291ba11
JB		 1466 if (WARN_ON(!ifmgd->associated))
1467 return;
1468
79543d8e
DS		 1469 ieee80211_stop_poll(sdata);
1470
77fdaa12 1471 ifmgd->associated = NULL;
77fdaa12
JB		 1472
1473 /*
1474 * we need to commit the associated = NULL change because the
1475 * scan code uses that to determine whether this iface should
1476 * go to/wake up from powersave or not -- and could otherwise
1477 * wake the queues erroneously.
1478 */
1479 smp_mb();
1480
1481 /*
1482 * Thus, we can only afterwards stop the queues -- to account
1483 * for the case where another CPU is finishing a scan at this
1484 * time -- we don't want the scan code to enable queues.
1485 */
aa458d17 1486
8a5b33f5 1487 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1488 netif_carrier_off(sdata->dev);
1489
88bc40e8
EP		 1490 /*
1491 * if we want to get out of ps before disassoc (why?) we have
1492 * to do it before sending disassoc, as otherwise the null-packet
1493 * won't be valid.
1494 */
1495 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1496 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1497 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1498 }
1499 local->ps_sdata = NULL;
1500
ab095877
EP		 1501 /* disable per-vif ps */
1502 ieee80211_recalc_ps_vif(sdata);
1503
f823981e
EP		 1504 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1505 if (tx)
1506 drv_flush(local, false);
1507
37ad3888
JB		 1508 /* deauthenticate/disassociate now */
1509 if (tx || frame_buf)
88a9e31c
EP		 1510 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1511 reason, tx, frame_buf);
37ad3888
JB		 1512
1513 /* flush out frame */
1514 if (tx)
1515 drv_flush(local, false);
1516
88a9e31c
EP		 1517 /* clear bssid only after building the needed mgmt frames */
1518 memset(ifmgd->bssid, 0, ETH_ALEN);
1519
37ad3888 1520 /* remove AP and TDLS peers */
051007d9 1521 sta_info_flush_defer(sdata);
37ad3888
JB		 1522
1523 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1524 changed |= ieee80211_reset_erp_info(sdata);
1525
f5e5bf25 1526 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1527 changed |= BSS_CHANGED_ASSOC;
1528 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1529
488dd7b5
JB		 1530 sdata->vif.bss_conf.p2p_ctwindow = 0;
1531 sdata->vif.bss_conf.p2p_oppps = false;
1532
413ad50a 1533 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1534 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1535 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1536
1ea6f9c0 1537 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1538
520eb820
KV		 1539 del_timer_sync(&local->dynamic_ps_timer);
1540 cancel_work_sync(&local->dynamic_ps_enable_work);
1541
68542962 1542 /* Disable ARP filtering */
0f19b41e 1543 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1544 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1545
3abead59
JB		 1546 sdata->vif.bss_conf.qos = false;
1547 changed |= BSS_CHANGED_QOS;
1548
0aaffa9b
JB		 1549 /* The BSSID (not really interesting) and HT changed */
1550 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1551 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1552
3abead59
JB		 1553 /* disassociated - set to defaults now */
1554 ieee80211_set_wmm_default(sdata, false);
1555
b9dcf712
JB		 1556 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1557 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1558 del_timer_sync(&sdata->u.mgd.timer);
1559 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1560
1561 sdata->u.mgd.timers_running = 0;
028e8da0 1562
826262c3
JB		 1563 sdata->vif.bss_conf.dtim_period = 0;
1564
028e8da0
JB		 1565 ifmgd->flags = 0;
1566 ieee80211_vif_release_channel(sdata);
aa458d17 1567}
f0706e82 1568
3cf335d5
KV		 1569void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1570 struct ieee80211_hdr *hdr)
1571{
1572 /*
1573 * We can postpone the mgd.timer whenever receiving unicast frames
1574 * from AP because we know that the connection is working both ways
1575 * at that time. But multicast frames (and hence also beacons) must
1576 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1577 * data idle periods for sending the periodic probe request to the
1578 * AP we're connected to.
3cf335d5 1579 */
b291ba11
JB		 1580 if (is_multicast_ether_addr(hdr->addr1))
1581 return;
1582
be099e82 1583 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1584}
f0706e82 1585
4e5ff376
FF		 1586static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1587{
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1589 struct ieee80211_local *local = sdata->local;
4e5ff376 1590
133d40f9 1591 mutex_lock(&local->mtx);
4e5ff376 1592 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1593 IEEE80211_STA_CONNECTION_POLL))) {
1594 mutex_unlock(&local->mtx);
1595 return;
1596 }
4e5ff376 1597
925e64c3 1598 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1599
1600 mutex_lock(&local->iflist_mtx);
1601 ieee80211_recalc_ps(local, -1);
1602 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1603
1604 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1605 goto out;
4e5ff376
FF		 1606
1607 /*
1608 * We've received a probe response, but are not sure whether
1609 * we have or will be receiving any beacons or data, so let's
1610 * schedule the timers again, just in case.
1611 */
1612 ieee80211_sta_reset_beacon_monitor(sdata);
1613
1614 mod_timer(&ifmgd->conn_mon_timer,
1615 round_jiffies_up(jiffies +
1616 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1617out:
133d40f9 1618 mutex_unlock(&local->mtx);
4e5ff376
FF		 1619}
1620
1621void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1622 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1623{
75706d0e 1624 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1625 return;
1626
04ac3c0e
FF		 1627 if (ack)
1628 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1629
1630 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1631 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1632 if (ack)
1633 sdata->u.mgd.probe_send_count = 0;
1634 else
1635 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1636 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1637 }
1638}
1639
a43abf29
ML		 1640static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1641{
1642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1643 const u8 *ssid;
f01a067d 1644 u8 *dst = ifmgd->associated->bssid;
180205bd 1645 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1646
1647 /*
1648 * Try sending broadcast probe requests for the last three
1649 * probe requests after the first ones failed since some
1650 * buggy APs only support broadcast probe requests.
1651 */
1652 if (ifmgd->probe_send_count >= unicast_limit)
1653 dst = NULL;
a43abf29 1654
4e5ff376
FF		 1655 /*
1656 * When the hardware reports an accurate Tx ACK status, it's
1657 * better to send a nullfunc frame instead of a probe request,
1658 * as it will kick us off the AP quickly if we aren't associated
1659 * anymore. The timeout will be reset if the frame is ACKed by
1660 * the AP.
1661 */
992e68bf
SD		 1662 ifmgd->probe_send_count++;
1663
04ac3c0e
FF		 1664 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1665 ifmgd->nullfunc_failed = false;
4e5ff376 1666 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1667 } else {
88c868c4
SG		 1668 int ssid_len;
1669
9caf0364 1670 rcu_read_lock();
4e5ff376 1671 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1672 if (WARN_ON_ONCE(ssid == NULL))
1673 ssid_len = 0;
1674 else
1675 ssid_len = ssid[1];
1676
1677 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1678 0, (u32) -1, true, 0,
55de908a 1679 ifmgd->associated->channel, false);
9caf0364 1680 rcu_read_unlock();
4e5ff376 1681 }
a43abf29 1682
180205bd 1683 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1684 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1685 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1686 drv_flush(sdata->local, false);
a43abf29
ML		 1687}
1688
b291ba11
JB		 1689static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1690 bool beacon)
04de8381 1691{
04de8381 1692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1693 bool already = false;
34bfc411 1694
9607e6b6 1695 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1696 return;
1697
77fdaa12
JB		 1698 mutex_lock(&ifmgd->mtx);
1699
1700 if (!ifmgd->associated)
1701 goto out;
1702
133d40f9
SG		 1703 mutex_lock(&sdata->local->mtx);
1704
1705 if (sdata->local->tmp_channel || sdata->local->scanning) {
1706 mutex_unlock(&sdata->local->mtx);
1707 goto out;
1708 }
1709
e87cc472 1710 if (beacon)
bdcbd8e0 1711 mlme_dbg_ratelimited(sdata,
112c31f0 1712 "detected beacon loss from AP - probing\n");
bdcbd8e0 1713
6efb71b0
HS		 1714 ieee80211_cqm_rssi_notify(&sdata->vif,
1715 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1716
b291ba11
JB		 1717 /*
1718 * The driver/our work has already reported this event or the
1719 * connection monitoring has kicked in and we have already sent
1720 * a probe request. Or maybe the AP died and the driver keeps
1721 * reporting until we disassociate...
1722 *
1723 * In either case we have to ignore the current call to this
1724 * function (except for setting the correct probe reason bit)
1725 * because otherwise we would reset the timer every time and
1726 * never check whether we received a probe response!
1727 */
1728 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1729 IEEE80211_STA_CONNECTION_POLL))
1730 already = true;
1731
1732 if (beacon)
1733 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1734 else
1735 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1736
133d40f9
SG		 1737 mutex_unlock(&sdata->local->mtx);
1738
b291ba11
JB		 1739 if (already)
1740 goto out;
1741
4e751843
JB		 1742 mutex_lock(&sdata->local->iflist_mtx);
1743 ieee80211_recalc_ps(sdata->local, -1);
1744 mutex_unlock(&sdata->local->iflist_mtx);
1745
a43abf29
ML		 1746 ifmgd->probe_send_count = 0;
1747 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1748 out:
1749 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1750}
1751
a619a4c0
JO		 1752struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1753 struct ieee80211_vif *vif)
1754{
1755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1757 struct cfg80211_bss *cbss;
a619a4c0
JO		 1758 struct sk_buff *skb;
1759 const u8 *ssid;
88c868c4 1760 int ssid_len;
a619a4c0
JO		 1761
1762 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1763 return NULL;
1764
1765 ASSERT_MGD_MTX(ifmgd);
1766
d9b3b28b
EP		 1767 if (ifmgd->associated)
1768 cbss = ifmgd->associated;
1769 else if (ifmgd->auth_data)
1770 cbss = ifmgd->auth_data->bss;
1771 else if (ifmgd->assoc_data)
1772 cbss = ifmgd->assoc_data->bss;
1773 else
a619a4c0
JO		 1774 return NULL;
1775
9caf0364 1776 rcu_read_lock();
d9b3b28b 1777 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1778 if (WARN_ON_ONCE(ssid == NULL))
1779 ssid_len = 0;
1780 else
1781 ssid_len = ssid[1];
1782
d9b3b28b 1783 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1784 (u32) -1, cbss->channel,
6b77863b 1785 ssid + 2, ssid_len,
85a237fe 1786 NULL, 0, true);
9caf0364 1787 rcu_read_unlock();
a619a4c0
JO		 1788
1789 return skb;
1790}
1791EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1792
eef9e54c 1793static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1794{
1795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1796 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1797
1798 mutex_lock(&ifmgd->mtx);
1799 if (!ifmgd->associated) {
1800 mutex_unlock(&ifmgd->mtx);
1801 return;
1802 }
1803
37ad3888
JB		 1804 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1805 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1806 true, frame_buf);
882a7c69 1807 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1808 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1809
1e4dcd01
JO		 1810 /*
1811 * must be outside lock due to cfg80211,
1812 * but that's not a problem.
1813 */
6ae16775 1814 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 1815}
1816
cc74c0c7 1817static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1818{
1819 struct ieee80211_sub_if_data *sdata =
1820 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1821 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1823 struct sta_info *sta;
1824
1825 if (ifmgd->associated) {
30fa9047 1826 rcu_read_lock();
a85e1d55
PS		 1827 sta = sta_info_get(sdata, ifmgd->bssid);
1828 if (sta)
1829 sta->beacon_loss_count++;
30fa9047 1830 rcu_read_unlock();
a85e1d55 1831 }
b291ba11 1832
682bd38b 1833 if (ifmgd->connection_loss) {
882a7c69
JB		 1834 sdata_info(sdata, "Connection to AP %pM lost\n",
1835 ifmgd->bssid);
eef9e54c 1836 __ieee80211_disconnect(sdata);
882a7c69 1837 } else {
1e4dcd01 1838 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1839 }
1840}
1841
1842static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1843{
1844 struct ieee80211_sub_if_data *sdata =
1845 container_of(work, struct ieee80211_sub_if_data,
1846 u.mgd.csa_connection_drop_work);
1847
1848 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1849 IEEE80211_QUEUE_STOP_REASON_CSA);
eef9e54c 1850 __ieee80211_disconnect(sdata);
b291ba11
JB		 1851}
1852
04de8381
KV		 1853void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1854{
1855 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1856 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1857
b5878a2d
JB		 1858 trace_api_beacon_loss(sdata);
1859
1e4dcd01 1860 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 1861 sdata->u.mgd.connection_loss = false;
1e4dcd01 1862 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1863}
1864EXPORT_SYMBOL(ieee80211_beacon_loss);
1865
1e4dcd01
JO		 1866void ieee80211_connection_loss(struct ieee80211_vif *vif)
1867{
1868 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1869 struct ieee80211_hw *hw = &sdata->local->hw;
1870
b5878a2d
JB		 1871 trace_api_connection_loss(sdata);
1872
682bd38b 1873 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 1874 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1875}
1876EXPORT_SYMBOL(ieee80211_connection_loss);
1877
1878
66e67e41
JB		 1879static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1880 bool assoc)
1881{
1882 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1883
1884 lockdep_assert_held(&sdata->u.mgd.mtx);
1885
66e67e41
JB		 1886 if (!assoc) {
1887 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1888
1889 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1890 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1891 sdata->u.mgd.flags = 0;
55de908a 1892 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1893 }
1894
5b112d3d 1895 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 1896 kfree(auth_data);
1897 sdata->u.mgd.auth_data = NULL;
1898}
1899
1900static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1901 struct ieee80211_mgmt *mgmt, size_t len)
1902{
1672c0e3 1903 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 1904 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1905 u8 *pos;
1906 struct ieee802_11_elems elems;
1672c0e3 1907 u32 tx_flags = 0;
66e67e41
JB		 1908
1909 pos = mgmt->u.auth.variable;
1910 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1911 if (!elems.challenge)
1912 return;
1913 auth_data->expected_transaction = 4;
a1845fc7 1914 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 1915 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1916 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1917 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 1918 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1919 elems.challenge - 2, elems.challenge_len + 2,
1920 auth_data->bss->bssid, auth_data->bss->bssid,
1921 auth_data->key, auth_data->key_len,
1672c0e3 1922 auth_data->key_idx, tx_flags);
66e67e41
JB		 1923}
1924
1925static enum rx_mgmt_action __must_check
1926ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1927 struct ieee80211_mgmt *mgmt, size_t len)
1928{
1929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1930 u8 bssid[ETH_ALEN];
1931 u16 auth_alg, auth_transaction, status_code;
1932 struct sta_info *sta;
1933
1934 lockdep_assert_held(&ifmgd->mtx);
1935
1936 if (len < 24 + 6)
1937 return RX_MGMT_NONE;
1938
1939 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1940 return RX_MGMT_NONE;
1941
1942 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1943
b203ca39 1944 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1945 return RX_MGMT_NONE;
1946
1947 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1948 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1949 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1950
1951 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1952 auth_transaction != ifmgd->auth_data->expected_transaction) {
1953 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1954 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1955 auth_transaction,
1956 ifmgd->auth_data->expected_transaction);
66e67e41 1957 return RX_MGMT_NONE;
0f4126e8 1958 }
66e67e41
JB		 1959
1960 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1961 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1962 mgmt->sa, status_code);
dac211ec
EP		 1963 ieee80211_destroy_auth_data(sdata, false);
1964 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1965 }
1966
1967 switch (ifmgd->auth_data->algorithm) {
1968 case WLAN_AUTH_OPEN:
1969 case WLAN_AUTH_LEAP:
1970 case WLAN_AUTH_FT:
6b8ece3a 1971 case WLAN_AUTH_SAE:
66e67e41
JB		 1972 break;
1973 case WLAN_AUTH_SHARED_KEY:
1974 if (ifmgd->auth_data->expected_transaction != 4) {
1975 ieee80211_auth_challenge(sdata, mgmt, len);
1976 /* need another frame */
1977 return RX_MGMT_NONE;
1978 }
1979 break;
1980 default:
1981 WARN_ONCE(1, "invalid auth alg %d",
1982 ifmgd->auth_data->algorithm);
1983 return RX_MGMT_NONE;
1984 }
1985
bdcbd8e0 1986 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1987 ifmgd->auth_data->done = true;
1988 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1989 run_again(ifmgd, ifmgd->auth_data->timeout);
1990
6b8ece3a
JM		 1991 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1992 ifmgd->auth_data->expected_transaction != 2) {
1993 /*
1994 * Report auth frame to user space for processing since another
1995 * round of Authentication frames is still needed.
1996 */
1997 return RX_MGMT_CFG80211_RX_AUTH;
1998 }
1999
66e67e41
JB		 2000 /* move station state to auth */
2001 mutex_lock(&sdata->local->sta_mtx);
2002 sta = sta_info_get(sdata, bssid);
2003 if (!sta) {
2004 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2005 goto out_err;
2006 }
2007 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2008 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2009 goto out_err;
2010 }
2011 mutex_unlock(&sdata->local->sta_mtx);
2012
2013 return RX_MGMT_CFG80211_RX_AUTH;
2014 out_err:
2015 mutex_unlock(&sdata->local->sta_mtx);
2016 /* ignore frame -- wait for timeout */
2017 return RX_MGMT_NONE;
2018}
2019
2020
77fdaa12
JB		 2021static enum rx_mgmt_action __must_check
2022ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2023 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2024{
46900298 2025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2026 const u8 *bssid = NULL;
f0706e82
JB		 2027 u16 reason_code;
2028
66e67e41
JB		 2029 lockdep_assert_held(&ifmgd->mtx);
2030
f4ea83dd 2031 if (len < 24 + 2)
77fdaa12 2032 return RX_MGMT_NONE;
f0706e82 2033
66e67e41 2034 if (!ifmgd->associated ||
b203ca39 2035 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2036 return RX_MGMT_NONE;
77fdaa12 2037
0c1ad2ca 2038 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2039
2040 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2041
bdcbd8e0
JB		 2042 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2043 bssid, reason_code);
77fdaa12 2044
37ad3888
JB		 2045 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2046
77fdaa12 2047 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2048}
2049
2050
77fdaa12
JB		 2051static enum rx_mgmt_action __must_check
2052ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2053 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2054{
46900298 2055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2056 u16 reason_code;
2057
66e67e41 2058 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2059
66e67e41 2060 if (len < 24 + 2)
77fdaa12
JB		 2061 return RX_MGMT_NONE;
2062
66e67e41 2063 if (!ifmgd->associated ||
b203ca39 2064 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2065 return RX_MGMT_NONE;
f0706e82
JB		 2066
2067 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2068
bdcbd8e0
JB		 2069 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2070 mgmt->sa, reason_code);
f0706e82 2071
37ad3888
JB		 2072 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2073
77fdaa12 2074 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2075}
2076
c74d084f
CL		 2077static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2078 u8 *supp_rates, unsigned int supp_rates_len,
2079 u32 *rates, u32 *basic_rates,
2080 bool *have_higher_than_11mbit,
2081 int *min_rate, int *min_rate_index)
2082{
2083 int i, j;
2084
2085 for (i = 0; i < supp_rates_len; i++) {
2086 int rate = (supp_rates[i] & 0x7f) * 5;
2087 bool is_basic = !!(supp_rates[i] & 0x80);
2088
2089 if (rate > 110)
2090 *have_higher_than_11mbit = true;
2091
2092 /*
2093 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2094 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2095 *
2096 * Note: Even through the membership selector and the basic
2097 * rate flag share the same bit, they are not exactly
2098 * the same.
2099 */
2100 if (!!(supp_rates[i] & 0x80) &&
2101 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2102 continue;
2103
2104 for (j = 0; j < sband->n_bitrates; j++) {
2105 if (sband->bitrates[j].bitrate == rate) {
2106 *rates |= BIT(j);
2107 if (is_basic)
2108 *basic_rates |= BIT(j);
2109 if (rate < *min_rate) {
2110 *min_rate = rate;
2111 *min_rate_index = j;
2112 }
2113 break;
2114 }
2115 }
2116 }
2117}
f0706e82 2118
66e67e41
JB		 2119static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2120 bool assoc)
2121{
2122 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2123
2124 lockdep_assert_held(&sdata->u.mgd.mtx);
2125
66e67e41
JB		 2126 if (!assoc) {
2127 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2128
2129 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2130 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2131 sdata->u.mgd.flags = 0;
55de908a 2132 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2133 }
2134
2135 kfree(assoc_data);
2136 sdata->u.mgd.assoc_data = NULL;
2137}
2138
2139static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2140 struct cfg80211_bss *cbss,
af6b6374 2141 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2142{
46900298 2143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2144 struct ieee80211_local *local = sdata->local;
8318d78a 2145 struct ieee80211_supported_band *sband;
f0706e82 2146 struct sta_info *sta;
af6b6374 2147 u8 *pos;
af6b6374 2148 u16 capab_info, aid;
f0706e82 2149 struct ieee802_11_elems elems;
bda3933a 2150 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2151 u32 changed = 0;
c74d084f 2152 int err;
f0706e82 2153
af6b6374 2154 /* AssocResp and ReassocResp have identical structure */
f0706e82 2155
f0706e82 2156 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2157 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2158
1dd84aa2 2159 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2160 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2161 aid);
1dd84aa2
JB		 2162 aid &= ~(BIT(15) | BIT(14));
2163
05cb9108
JB		 2164 ifmgd->broken_ap = false;
2165
2166 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2167 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2168 aid);
05cb9108
JB		 2169 aid = 0;
2170 ifmgd->broken_ap = true;
2171 }
2172
af6b6374
JB		 2173 pos = mgmt->u.assoc_resp.variable;
2174 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2175
f0706e82 2176 if (!elems.supp_rates) {
bdcbd8e0 2177 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2178 return false;
f0706e82
JB		 2179 }
2180
46900298 2181 ifmgd->aid = aid;
f0706e82 2182
2a33bee2
GE		 2183 mutex_lock(&sdata->local->sta_mtx);
2184 /*
2185 * station info was already allocated and inserted before
2186 * the association and should be available to us
2187 */
7852e361 2188 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2189 if (WARN_ON(!sta)) {
2190 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2191 return false;
77fdaa12 2192 }
05e5e883 2193
55de908a 2194 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2195
a8243b72 2196 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2197 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2198 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2199
64f68e5d
JB		 2200 sta->supports_40mhz =
2201 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2202
818255ea
MP		 2203 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2204 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2205 elems.vht_cap_elem,
2206 &sta->sta.vht_cap);
2207
4b7679a5 2208 rate_control_rate_init(sta);
f0706e82 2209
46900298 2210 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2211 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2212
ddf4ac53 2213 if (elems.wmm_param)
c2c98fde 2214 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2215
3e4d40fa 2216 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2217 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2218 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2219 if (err) {
bdcbd8e0
JB		 2220 sdata_info(sdata,
2221 "failed to move station %pM to desired state\n",
2222 sta->sta.addr);
c8987876
JB		 2223 WARN_ON(__sta_info_destroy(sta));
2224 mutex_unlock(&sdata->local->sta_mtx);
2225 return false;
2226 }
2227
7852e361 2228 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2229
f2176d72
JO		 2230 /*
2231 * Always handle WMM once after association regardless
2232 * of the first value the AP uses. Setting -1 here has
2233 * that effect because the AP values is an unsigned
2234 * 4-bit value.
2235 */
2236 ifmgd->wmm_last_param_set = -1;
2237
ddf4ac53 2238 if (elems.wmm_param)
4ced3f74 2239 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2240 elems.wmm_param_len);
aa837e1d 2241 else
3abead59
JB		 2242 ieee80211_set_wmm_default(sdata, false);
2243 changed |= BSS_CHANGED_QOS;
f0706e82 2244
074d46d1 2245 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2246 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2247 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2248 cbss->bssid, false);
ae5eb026 2249
60f8b39c
JB		 2250 /* set AID and assoc capability,
2251 * ieee80211_set_associated() will tell the driver */
2252 bss_conf->aid = aid;
2253 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2254 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2255
d524215f
FF		 2256 /*
2257 * If we're using 4-addr mode, let the AP know that we're
2258 * doing so, so that it can create the STA VLAN on its side
2259 */
2260 if (ifmgd->use_4addr)
2261 ieee80211_send_4addr_nullfunc(local, sdata);
2262
15b7b062 2263 /*
b291ba11
JB		 2264 * Start timer to probe the connection to the AP now.
2265 * Also start the timer that will detect beacon loss.
15b7b062 2266 */
b291ba11 2267 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2268 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2269
af6b6374 2270 return true;
f0706e82
JB		 2271}
2272
66e67e41
JB		 2273static enum rx_mgmt_action __must_check
2274ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2275 struct ieee80211_mgmt *mgmt, size_t len,
2276 struct cfg80211_bss **bss)
2277{
2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2280 u16 capab_info, status_code, aid;
2281 struct ieee802_11_elems elems;
2282 u8 *pos;
2283 bool reassoc;
2284
2285 lockdep_assert_held(&ifmgd->mtx);
2286
2287 if (!assoc_data)
2288 return RX_MGMT_NONE;
b203ca39 2289 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2290 return RX_MGMT_NONE;
2291
2292 /*
2293 * AssocResp and ReassocResp have identical structure, so process both
2294 * of them in this function.
2295 */
2296
2297 if (len < 24 + 6)
2298 return RX_MGMT_NONE;
2299
2300 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2301 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2302 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2303 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2304
bdcbd8e0
JB		 2305 sdata_info(sdata,
2306 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2307 reassoc ? "Rea" : "A", mgmt->sa,
2308 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2309
2310 pos = mgmt->u.assoc_resp.variable;
2311 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2312
2313 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2314 elems.timeout_int && elems.timeout_int_len == 5 &&
2315 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2316 u32 tu, ms;
2317 tu = get_unaligned_le32(elems.timeout_int + 1);
2318 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2319 sdata_info(sdata,
2320 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2321 mgmt->sa, tu, ms);
66e67e41
JB		 2322 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2323 if (ms > IEEE80211_ASSOC_TIMEOUT)
2324 run_again(ifmgd, assoc_data->timeout);
2325 return RX_MGMT_NONE;
2326 }
2327
2328 *bss = assoc_data->bss;
2329
2330 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2331 sdata_info(sdata, "%pM denied association (code=%d)\n",
2332 mgmt->sa, status_code);
66e67e41
JB		 2333 ieee80211_destroy_assoc_data(sdata, false);
2334 } else {
66e67e41
JB		 2335 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2336 /* oops -- internal error -- send timeout for now */
10a9109f 2337 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2338 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2339 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2340 }
635d999f 2341 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2342
2343 /*
2344 * destroy assoc_data afterwards, as otherwise an idle
2345 * recalc after assoc_data is NULL but before associated
2346 * is set can cause the interface to go idle
2347 */
2348 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2349 }
2350
2351 return RX_MGMT_CFG80211_RX_ASSOC;
2352}
8e3c1b77 2353
98c8fccf 2354static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2355 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2356 struct ieee80211_rx_status *rx_status,
d45c4172 2357 struct ieee802_11_elems *elems)
98c8fccf
JB		 2358{
2359 struct ieee80211_local *local = sdata->local;
2360 int freq;
c2b13452 2361 struct ieee80211_bss *bss;
98c8fccf 2362 struct ieee80211_channel *channel;
56007a02
JB		 2363 bool need_ps = false;
2364
826262c3
JB		 2365 if ((sdata->u.mgd.associated &&
2366 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2367 (sdata->u.mgd.assoc_data &&
2368 ether_addr_equal(mgmt->bssid,
2369 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2370 /* not previously set so we may need to recalc */
826262c3
JB		 2371 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2372
2373 if (elems->tim && !elems->parse_error) {
2374 struct ieee80211_tim_ie *tim_ie = elems->tim;
2375 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2376 }
56007a02 2377 }
98c8fccf
JB		 2378
2379 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2380 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2381 rx_status->band);
98c8fccf
JB		 2382 else
2383 freq = rx_status->freq;
2384
2385 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2386
2387 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2388 return;
2389
98c8fccf 2390 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2391 channel);
77fdaa12
JB		 2392 if (bss)
2393 ieee80211_rx_bss_put(local, bss);
2394
2395 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2396 return;
2397
56007a02
JB		 2398 if (need_ps) {
2399 mutex_lock(&local->iflist_mtx);
2400 ieee80211_recalc_ps(local, -1);
2401 mutex_unlock(&local->iflist_mtx);
2402 }
2403
5bc1420b
JB		 2404 if (elems->ch_switch_ie &&
2405 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2406 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2407 bss, rx_status->mactime);
f0706e82
JB		 2408}
2409
2410
f698d856 2411static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2412 struct sk_buff *skb)
f0706e82 2413{
af6b6374 2414 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2415 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2416 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2417 size_t baselen, len = skb->len;
ae6a44e3
EK		 2418 struct ieee802_11_elems elems;
2419
15b7b062
KV		 2420 ifmgd = &sdata->u.mgd;
2421
77fdaa12
JB		 2422 ASSERT_MGD_MTX(ifmgd);
2423
b203ca39 2424 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2425 return; /* ignore ProbeResp to foreign address */
2426
ae6a44e3
EK		 2427 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2428 if (baselen > len)
2429 return;
2430
2431 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2432 &elems);
2433
d45c4172 2434 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2435
77fdaa12 2436 if (ifmgd->associated &&
b203ca39 2437 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2438 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2439
2440 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2441 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2442 /* got probe response, continue with auth */
bdcbd8e0 2443 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2444 ifmgd->auth_data->tries = 0;
2445 ifmgd->auth_data->timeout = jiffies;
2446 run_again(ifmgd, ifmgd->auth_data->timeout);
2447 }
f0706e82
JB		 2448}
2449
d91f36db
JB		 2450/*
2451 * This is the canonical list of information elements we care about,
2452 * the filter code also gives us all changes to the Microsoft OUI
2453 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2454 *
2455 * We implement beacon filtering in software since that means we can
2456 * avoid processing the frame here and in cfg80211, and userspace
2457 * will not be able to tell whether the hardware supports it or not.
2458 *
2459 * XXX: This list needs to be dynamic -- userspace needs to be able to
2460 * add items it requires. It also needs to be able to tell us to
2461 * look out for other vendor IEs.
2462 */
2463static const u64 care_about_ies =
1d4df3a5
JB		 2464 (1ULL << WLAN_EID_COUNTRY) |
2465 (1ULL << WLAN_EID_ERP_INFO) |
2466 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2467 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2468 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2469 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2470
f698d856 2471static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2472 struct ieee80211_mgmt *mgmt,
2473 size_t len,
2474 struct ieee80211_rx_status *rx_status)
2475{
d91f36db 2476 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2477 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2478 size_t baselen;
2479 struct ieee802_11_elems elems;
f698d856 2480 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2481 struct ieee80211_chanctx_conf *chanctx_conf;
2482 struct ieee80211_channel *chan;
471b3efd 2483 u32 changed = 0;
f87ad637 2484 bool erp_valid;
7a5158ef 2485 u8 erp_value = 0;
d91f36db 2486 u32 ncrc;
77fdaa12
JB		 2487 u8 *bssid;
2488
66e67e41 2489 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2490
ae6a44e3
EK		 2491 /* Process beacon from the current BSS */
2492 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2493 if (baselen > len)
2494 return;
2495
55de908a
JB		 2496 rcu_read_lock();
2497 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2498 if (!chanctx_conf) {
2499 rcu_read_unlock();
f0706e82 2500 return;
55de908a
JB		 2501 }
2502
4bf88530 2503 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2504 rcu_read_unlock();
2505 return;
2506 }
4bf88530 2507 chan = chanctx_conf->def.chan;
55de908a 2508 rcu_read_unlock();
f0706e82 2509
c65dd147 2510 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2511 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2512 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2513 len - baselen, &elems);
77fdaa12 2514
d45c4172 2515 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2516 ifmgd->assoc_data->have_beacon = true;
c65dd147 2517 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2518 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2519 sdata->vif.bss_conf.sync_tsf =
2520 le64_to_cpu(mgmt->u.beacon.timestamp);
2521 sdata->vif.bss_conf.sync_device_ts =
2522 rx_status->device_timestamp;
2523 if (elems.tim)
2524 sdata->vif.bss_conf.sync_dtim_count =
2525 elems.tim->dtim_count;
2526 else
2527 sdata->vif.bss_conf.sync_dtim_count = 0;
2528 }
66e67e41
JB		 2529 /* continue assoc process */
2530 ifmgd->assoc_data->timeout = jiffies;
2531 run_again(ifmgd, ifmgd->assoc_data->timeout);
2532 return;
2533 }
77fdaa12 2534
66e67e41 2535 if (!ifmgd->associated ||
b203ca39 2536 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2537 return;
66e67e41 2538 bssid = ifmgd->associated->bssid;
f0706e82 2539
17e4ec14
JM		 2540 /* Track average RSSI from the Beacon frames of the current AP */
2541 ifmgd->last_beacon_signal = rx_status->signal;
2542 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2543 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2544 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2545 ifmgd->last_cqm_event_signal = 0;
391a200a 2546 ifmgd->count_beacon_signal = 1;
615f7b9b 2547 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2548 } else {
2549 ifmgd->ave_beacon_signal =
2550 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2551 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2552 ifmgd->ave_beacon_signal) / 16;
391a200a 2553 ifmgd->count_beacon_signal++;
17e4ec14 2554 }
615f7b9b
MV		 2555
2556 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2557 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2558 int sig = ifmgd->ave_beacon_signal;
2559 int last_sig = ifmgd->last_ave_beacon_signal;
2560
2561 /*
2562 * if signal crosses either of the boundaries, invoke callback
2563 * with appropriate parameters
2564 */
2565 if (sig > ifmgd->rssi_max_thold &&
2566 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2567 ifmgd->last_ave_beacon_signal = sig;
887da917 2568 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2569 } else if (sig < ifmgd->rssi_min_thold &&
2570 (last_sig >= ifmgd->rssi_max_thold ||
2571 last_sig == 0)) {
2572 ifmgd->last_ave_beacon_signal = sig;
887da917 2573 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2574 }
2575 }
2576
17e4ec14 2577 if (bss_conf->cqm_rssi_thold &&
391a200a 2578 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2579 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2580 int sig = ifmgd->ave_beacon_signal / 16;
2581 int last_event = ifmgd->last_cqm_event_signal;
2582 int thold = bss_conf->cqm_rssi_thold;
2583 int hyst = bss_conf->cqm_rssi_hyst;
2584 if (sig < thold &&
2585 (last_event == 0 || sig < last_event - hyst)) {
2586 ifmgd->last_cqm_event_signal = sig;
2587 ieee80211_cqm_rssi_notify(
2588 &sdata->vif,
2589 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2590 GFP_KERNEL);
2591 } else if (sig > thold &&
2592 (last_event == 0 || sig > last_event + hyst)) {
2593 ifmgd->last_cqm_event_signal = sig;
2594 ieee80211_cqm_rssi_notify(
2595 &sdata->vif,
2596 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2597 GFP_KERNEL);
2598 }
2599 }
2600
b291ba11 2601 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2602 mlme_dbg_ratelimited(sdata,
112c31f0 2603 "cancelling AP probe due to a received beacon\n");
925e64c3 2604 mutex_lock(&local->mtx);
b291ba11 2605 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2606 ieee80211_run_deferred_scan(local);
2607 mutex_unlock(&local->mtx);
2608
4e751843
JB		 2609 mutex_lock(&local->iflist_mtx);
2610 ieee80211_recalc_ps(local, -1);
2611 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2612 }
2613
b291ba11
JB		 2614 /*
2615 * Push the beacon loss detection into the future since
2616 * we are processing a beacon from the AP just now.
2617 */
d3a910a8 2618 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2619
d91f36db
JB		 2620 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2621 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2622 len - baselen, &elems,
2623 care_about_ies, ncrc);
2624
25c9c875 2625 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2626 bool directed_tim = ieee80211_check_tim(elems.tim,
2627 elems.tim_len,
2628 ifmgd->aid);
1fb3606b 2629 if (directed_tim) {
572e0012 2630 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2631 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2632 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2633 ieee80211_hw_config(local,
2634 IEEE80211_CONF_CHANGE_PS);
2635 }
572e0012 2636 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2637 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2638 local->pspolling = true;
2639
2640 /*
2641 * Here is assumed that the driver will be
2642 * able to send ps-poll frame and receive a
2643 * response even though power save mode is
2644 * enabled, but some drivers might require
2645 * to disable power save here. This needs
2646 * to be investigated.
2647 */
2648 ieee80211_send_pspoll(local, sdata);
2649 }
a97b77b9
VN		 2650 }
2651 }
7a5158ef 2652
488dd7b5
JB		 2653 if (sdata->vif.p2p) {
2654 u8 noa[2];
2655 int ret;
2656
2657 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2658 len - baselen,
2659 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2660 noa, sizeof(noa));
2661 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2662 bss_conf->p2p_oppps = noa[1] & 0x80;
2663 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2664 changed |= BSS_CHANGED_P2P_PS;
2665 sdata->u.mgd.p2p_noa_index = noa[0];
2666 /*
2667 * make sure we update all information, the CRC
2668 * mechanism doesn't look at P2P attributes.
2669 */
2670 ifmgd->beacon_crc_valid = false;
2671 }
2672 }
2673
d8ec4433 2674 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2675 return;
2676 ifmgd->beacon_crc = ncrc;
d8ec4433 2677 ifmgd->beacon_crc_valid = true;
30196673 2678
d45c4172 2679 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2680
2681 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2682 elems.wmm_param_len))
2683 changed |= BSS_CHANGED_QOS;
2684
c65dd147
EG		 2685 /*
2686 * If we haven't had a beacon before, tell the driver about the
ef429dad 2687 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2688 */
2689 if (!bss_conf->dtim_period) {
2690 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2691 if (elems.tim)
2692 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2693 else
2694 bss_conf->dtim_period = 1;
ef429dad
JB		 2695
2696 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2697 sdata->vif.bss_conf.sync_tsf =
2698 le64_to_cpu(mgmt->u.beacon.timestamp);
2699 sdata->vif.bss_conf.sync_device_ts =
2700 rx_status->device_timestamp;
2701 if (elems.tim)
2702 sdata->vif.bss_conf.sync_dtim_count =
2703 elems.tim->dtim_count;
2704 else
2705 sdata->vif.bss_conf.sync_dtim_count = 0;
2706 }
2707
c65dd147
EG		 2708 changed |= BSS_CHANGED_DTIM_PERIOD;
2709 }
2710
7a5158ef
JB		 2711 if (elems.erp_info && elems.erp_info_len >= 1) {
2712 erp_valid = true;
2713 erp_value = elems.erp_info[0];
2714 } else {
2715 erp_valid = false;
50c4afb9 2716 }
7a5158ef
JB		 2717 changed |= ieee80211_handle_bss_capability(sdata,
2718 le16_to_cpu(mgmt->u.beacon.capab_info),
2719 erp_valid, erp_value);
f0706e82 2720
d3c990fb 2721
074d46d1 2722 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2723 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2724 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2725 bssid, true);
d3c990fb 2726
04b7b2ff
JB		 2727 if (elems.country_elem && elems.pwr_constr_elem &&
2728 mgmt->u.probe_resp.capab_info &
2729 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2730 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2731 elems.country_elem,
2732 elems.country_elem_len,
2733 elems.pwr_constr_elem);
3f2355cb 2734
471b3efd 2735 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2736}
2737
1fa57d01
JB		 2738void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2739 struct sk_buff *skb)
f0706e82 2740{
77fdaa12 2741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2742 struct ieee80211_rx_status *rx_status;
f0706e82 2743 struct ieee80211_mgmt *mgmt;
66e67e41 2744 struct cfg80211_bss *bss = NULL;
77fdaa12 2745 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2746 u16 fc;
2747
f0706e82
JB		 2748 rx_status = (struct ieee80211_rx_status *) skb->cb;
2749 mgmt = (struct ieee80211_mgmt *) skb->data;
2750 fc = le16_to_cpu(mgmt->frame_control);
2751
77fdaa12
JB		 2752 mutex_lock(&ifmgd->mtx);
2753
66e67e41
JB		 2754 switch (fc & IEEE80211_FCTL_STYPE) {
2755 case IEEE80211_STYPE_BEACON:
2756 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2757 break;
2758 case IEEE80211_STYPE_PROBE_RESP:
2759 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2760 break;
2761 case IEEE80211_STYPE_AUTH:
2762 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2763 break;
2764 case IEEE80211_STYPE_DEAUTH:
2765 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2766 break;
2767 case IEEE80211_STYPE_DISASSOC:
2768 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2769 break;
2770 case IEEE80211_STYPE_ASSOC_RESP:
2771 case IEEE80211_STYPE_REASSOC_RESP:
2772 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2773 break;
2774 case IEEE80211_STYPE_ACTION:
2775 switch (mgmt->u.action.category) {
2776 case WLAN_CATEGORY_SPECTRUM_MGMT:
2777 ieee80211_sta_process_chanswitch(sdata,
2778 &mgmt->u.action.u.chan_switch.sw_elem,
2779 (void *)ifmgd->associated->priv,
2780 rx_status->mactime);
77fdaa12 2781 break;
77fdaa12 2782 }
77fdaa12 2783 }
77fdaa12
JB		 2784 mutex_unlock(&ifmgd->mtx);
2785
66e67e41
JB		 2786 switch (rma) {
2787 case RX_MGMT_NONE:
2788 /* no action */
2789 break;
2790 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2791 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2792 break;
2793 case RX_MGMT_CFG80211_DISASSOC:
2794 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2795 break;
2796 case RX_MGMT_CFG80211_RX_AUTH:
2797 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2798 break;
2799 case RX_MGMT_CFG80211_RX_ASSOC:
2800 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2801 break;
2802 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2803 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2804 break;
2805 default:
2806 WARN(1, "unexpected: %d", rma);
b054b747 2807 }
f0706e82
JB		 2808}
2809
9c6bd790 2810static void ieee80211_sta_timer(unsigned long data)
f0706e82 2811{
60f8b39c
JB		 2812 struct ieee80211_sub_if_data *sdata =
2813 (struct ieee80211_sub_if_data *) data;
46900298 2814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2815 struct ieee80211_local *local = sdata->local;
f0706e82 2816
5bb644a0
JB		 2817 if (local->quiescing) {
2818 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2819 return;
2820 }
2821
64592c8f 2822 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2823}
2824
04ac3c0e 2825static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 2826 u8 *bssid, u8 reason, bool tx)
04ac3c0e 2827{
04ac3c0e 2828 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2829 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2830
37ad3888 2831 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 2832 tx, frame_buf);
04ac3c0e 2833 mutex_unlock(&ifmgd->mtx);
37ad3888 2834
04ac3c0e
FF		 2835 /*
2836 * must be outside lock due to cfg80211,
2837 * but that's not a problem.
2838 */
6ae16775 2839 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 2840
04ac3c0e
FF		 2841 mutex_lock(&ifmgd->mtx);
2842}
2843
66e67e41
JB		 2844static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2845{
2846 struct ieee80211_local *local = sdata->local;
2847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2848 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 2849 u32 tx_flags = 0;
66e67e41
JB		 2850
2851 lockdep_assert_held(&ifmgd->mtx);
2852
2853 if (WARN_ON_ONCE(!auth_data))
2854 return -EINVAL;
2855
1672c0e3
JB		 2856 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2857 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2858 IEEE80211_TX_INTFL_MLME_CONN_TX;
2859
66e67e41
JB		 2860 auth_data->tries++;
2861
2862 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2863 sdata_info(sdata, "authentication with %pM timed out\n",
2864 auth_data->bss->bssid);
66e67e41
JB		 2865
2866 /*
2867 * Most likely AP is not in the range so remove the
2868 * bss struct for that AP.
2869 */
2870 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2871
2872 return -ETIMEDOUT;
2873 }
2874
a1845fc7
JB		 2875 drv_mgd_prepare_tx(local, sdata);
2876
66e67e41 2877 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2878 u16 trans = 1;
2879 u16 status = 0;
2880
bdcbd8e0
JB		 2881 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2882 auth_data->bss->bssid, auth_data->tries,
2883 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2884
2885 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2886
2887 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2888 trans = auth_data->sae_trans;
2889 status = auth_data->sae_status;
2890 auth_data->expected_transaction = trans;
2891 }
2892
2893 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2894 auth_data->data, auth_data->data_len,
66e67e41 2895 auth_data->bss->bssid,
1672c0e3
JB		 2896 auth_data->bss->bssid, NULL, 0, 0,
2897 tx_flags);
66e67e41
JB		 2898 } else {
2899 const u8 *ssidie;
2900
bdcbd8e0
JB		 2901 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2902 auth_data->bss->bssid, auth_data->tries,
2903 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2904
9caf0364 2905 rcu_read_lock();
66e67e41 2906 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2907 if (!ssidie) {
2908 rcu_read_unlock();
66e67e41 2909 return -EINVAL;
9caf0364 2910 }
66e67e41
JB		 2911 /*
2912 * Direct probe is sent to broadcast address as some APs
2913 * will not answer to direct packet in unassociated state.
2914 */
2915 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 2916 NULL, 0, (u32) -1, true, tx_flags,
55de908a 2917 auth_data->bss->channel, false);
9caf0364 2918 rcu_read_unlock();
66e67e41
JB		 2919 }
2920
1672c0e3
JB		 2921 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2922 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2923 run_again(ifmgd, auth_data->timeout);
2924 }
66e67e41
JB		 2925
2926 return 0;
2927}
2928
2929static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2930{
2931 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2932 struct ieee80211_local *local = sdata->local;
2933
2934 lockdep_assert_held(&sdata->u.mgd.mtx);
2935
66e67e41
JB		 2936 assoc_data->tries++;
2937 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2938 sdata_info(sdata, "association with %pM timed out\n",
2939 assoc_data->bss->bssid);
66e67e41
JB		 2940
2941 /*
2942 * Most likely AP is not in the range so remove the
2943 * bss struct for that AP.
2944 */
2945 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2946
2947 return -ETIMEDOUT;
2948 }
2949
bdcbd8e0
JB		 2950 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2951 assoc_data->bss->bssid, assoc_data->tries,
2952 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2953 ieee80211_send_assoc(sdata);
2954
1672c0e3
JB		 2955 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2956 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2957 run_again(&sdata->u.mgd, assoc_data->timeout);
2958 }
66e67e41
JB		 2959
2960 return 0;
2961}
2962
1672c0e3
JB		 2963void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2964 __le16 fc, bool acked)
2965{
2966 struct ieee80211_local *local = sdata->local;
2967
2968 sdata->u.mgd.status_fc = fc;
2969 sdata->u.mgd.status_acked = acked;
2970 sdata->u.mgd.status_received = true;
2971
2972 ieee80211_queue_work(&local->hw, &sdata->work);
2973}
2974
1fa57d01 2975void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2976{
9c6bd790 2977 struct ieee80211_local *local = sdata->local;
1fa57d01 2978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2979
77fdaa12
JB		 2980 mutex_lock(&ifmgd->mtx);
2981
1672c0e3
JB		 2982 if (ifmgd->status_received) {
2983 __le16 fc = ifmgd->status_fc;
2984 bool status_acked = ifmgd->status_acked;
2985
2986 ifmgd->status_received = false;
2987 if (ifmgd->auth_data &&
2988 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
2989 if (status_acked) {
2990 ifmgd->auth_data->timeout =
2991 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
2992 run_again(ifmgd, ifmgd->auth_data->timeout);
2993 } else {
2994 ifmgd->auth_data->timeout = jiffies - 1;
2995 }
2996 } else if (ifmgd->assoc_data &&
2997 (ieee80211_is_assoc_req(fc) ||
2998 ieee80211_is_reassoc_req(fc))) {
2999 if (status_acked) {
3000 ifmgd->assoc_data->timeout =
3001 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3002 run_again(ifmgd, ifmgd->assoc_data->timeout);
3003 } else {
3004 ifmgd->assoc_data->timeout = jiffies - 1;
3005 }
3006 }
3007 }
3008
66e67e41
JB		 3009 if (ifmgd->auth_data &&
3010 time_after(jiffies, ifmgd->auth_data->timeout)) {
3011 if (ifmgd->auth_data->done) {
3012 /*
3013 * ok ... we waited for assoc but userspace didn't,
3014 * so let's just kill the auth data
3015 */
3016 ieee80211_destroy_auth_data(sdata, false);
3017 } else if (ieee80211_probe_auth(sdata)) {
3018 u8 bssid[ETH_ALEN];
3019
3020 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3021
3022 ieee80211_destroy_auth_data(sdata, false);
3023
3024 mutex_unlock(&ifmgd->mtx);
3025 cfg80211_send_auth_timeout(sdata->dev, bssid);
3026 mutex_lock(&ifmgd->mtx);
3027 }
3028 } else if (ifmgd->auth_data)
3029 run_again(ifmgd, ifmgd->auth_data->timeout);
3030
3031 if (ifmgd->assoc_data &&
3032 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3033 if ((ifmgd->assoc_data->need_beacon &&
3034 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3035 ieee80211_do_assoc(sdata)) {
3036 u8 bssid[ETH_ALEN];
3037
3038 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3039
3040 ieee80211_destroy_assoc_data(sdata, false);
3041
3042 mutex_unlock(&ifmgd->mtx);
3043 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3044 mutex_lock(&ifmgd->mtx);
3045 }
3046 } else if (ifmgd->assoc_data)
3047 run_again(ifmgd, ifmgd->assoc_data->timeout);
3048
b291ba11
JB		 3049 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3050 IEEE80211_STA_CONNECTION_POLL) &&
3051 ifmgd->associated) {
a43abf29 3052 u8 bssid[ETH_ALEN];
72a8a3ed 3053 int max_tries;
a43abf29 3054
0c1ad2ca 3055 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3056
72a8a3ed 3057 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3058 max_tries = max_nullfunc_tries;
72a8a3ed 3059 else
180205bd 3060 max_tries = max_probe_tries;
72a8a3ed 3061
4e5ff376
FF		 3062 /* ACK received for nullfunc probing frame */
3063 if (!ifmgd->probe_send_count)
3064 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3065 else if (ifmgd->nullfunc_failed) {
3066 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3067 mlme_dbg(sdata,
3068 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3069 bssid, ifmgd->probe_send_count,
3070 max_tries);
04ac3c0e
FF		 3071 ieee80211_mgd_probe_ap_send(sdata);
3072 } else {
bdcbd8e0
JB		 3073 mlme_dbg(sdata,
3074 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3075 bssid);
95acac61 3076 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3077 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3078 false);
04ac3c0e
FF		 3079 }
3080 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3081 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3082 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3083 mlme_dbg(sdata,
3084 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3085 bssid, probe_wait_ms);
95acac61 3086 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3087 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3088 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3089 mlme_dbg(sdata,
3090 "No probe response from AP %pM after %dms, try %d/%i\n",
3091 bssid, probe_wait_ms,
3092 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3093 ieee80211_mgd_probe_ap_send(sdata);
3094 } else {
b291ba11
JB		 3095 /*
3096 * We actually lost the connection ... or did we?
3097 * Let's make sure!
3098 */
b38afa87
BG		 3099 wiphy_debug(local->hw.wiphy,
3100 "%s: No probe response from AP %pM"
3101 " after %dms, disconnecting.\n",
3102 sdata->name,
180205bd 3103 bssid, probe_wait_ms);
04ac3c0e 3104
95acac61 3105 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3106 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3107 }
3108 }
3109
77fdaa12 3110 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3111}
3112
b291ba11
JB		 3113static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3114{
3115 struct ieee80211_sub_if_data *sdata =
3116 (struct ieee80211_sub_if_data *) data;
3117 struct ieee80211_local *local = sdata->local;
3118
3119 if (local->quiescing)
3120 return;
3121
682bd38b 3122 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3123 ieee80211_queue_work(&sdata->local->hw,
3124 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3125}
3126
3127static void ieee80211_sta_conn_mon_timer(unsigned long data)
3128{
3129 struct ieee80211_sub_if_data *sdata =
3130 (struct ieee80211_sub_if_data *) data;
3131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3132 struct ieee80211_local *local = sdata->local;
3133
3134 if (local->quiescing)
3135 return;
3136
42935eca 3137 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3138}
3139
3140static void ieee80211_sta_monitor_work(struct work_struct *work)
3141{
3142 struct ieee80211_sub_if_data *sdata =
3143 container_of(work, struct ieee80211_sub_if_data,
3144 u.mgd.monitor_work);
3145
3146 ieee80211_mgd_probe_ap(sdata, false);
3147}
3148
9c6bd790
JB		 3149static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3150{
494f1fe5
EP		 3151 u32 flags;
3152
ad935687 3153 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3154 __ieee80211_stop_poll(sdata);
ad935687 3155
b291ba11 3156 /* let's probe the connection once */
494f1fe5
EP		 3157 flags = sdata->local->hw.flags;
3158 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3159 ieee80211_queue_work(&sdata->local->hw,
3160 &sdata->u.mgd.monitor_work);
b291ba11 3161 /* and do all the other regular work too */
64592c8f 3162 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3163 }
9c6bd790 3164}
f0706e82 3165
5bb644a0
JB		 3166#ifdef CONFIG_PM
3167void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3168{
3169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3170
3171 /*
3172 * we need to use atomic bitops for the running bits
3173 * only because both timers might fire at the same
3174 * time -- the code here is properly synchronised.
3175 */
3176
d1f5b7a3
JB		 3177 cancel_work_sync(&ifmgd->request_smps_work);
3178
0ecfe806 3179 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3180 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3181 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3182 if (del_timer_sync(&ifmgd->timer))
3183 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3184
3185 cancel_work_sync(&ifmgd->chswitch_work);
3186 if (del_timer_sync(&ifmgd->chswitch_timer))
3187 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3188
b291ba11
JB		 3189 /* these will just be re-established on connection */
3190 del_timer_sync(&ifmgd->conn_mon_timer);
3191 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3192}
3193
3194void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3195{
3196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3197
782d2673
JB		 3198 mutex_lock(&ifmgd->mtx);
3199 if (!ifmgd->associated) {
3200 mutex_unlock(&ifmgd->mtx);
676b58c2 3201 return;
782d2673 3202 }
676b58c2 3203
95acac61
JB		 3204 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3205 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3206 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3207 ieee80211_sta_connection_lost(sdata,
3208 ifmgd->associated->bssid,
6b684db1
JB		 3209 WLAN_REASON_UNSPECIFIED,
3210 true);
95acac61 3211 mutex_unlock(&ifmgd->mtx);
782d2673 3212 return;
95acac61 3213 }
782d2673 3214 mutex_unlock(&ifmgd->mtx);
95acac61 3215
5bb644a0
JB		 3216 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3217 add_timer(&ifmgd->timer);
3218 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3219 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3220 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3221
3222 mutex_lock(&sdata->local->mtx);
46090979 3223 ieee80211_restart_sta_timer(sdata);
925e64c3 3224 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3225}
3226#endif
3227
9c6bd790
JB		 3228/* interface setup */
3229void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3230{
46900298 3231 struct ieee80211_if_managed *ifmgd;
988c0f72 3232
46900298 3233 ifmgd = &sdata->u.mgd;
b291ba11 3234 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3235 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3236 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3237 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3238 INIT_WORK(&ifmgd->csa_connection_drop_work,
3239 ieee80211_csa_connection_drop_work);
d1f5b7a3 3240 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3241 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3242 (unsigned long) sdata);
b291ba11
JB		 3243 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3244 (unsigned long) sdata);
3245 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3246 (unsigned long) sdata);
46900298 3247 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3248 (unsigned long) sdata);
9c6bd790 3249
ab1faead 3250 ifmgd->flags = 0;
1478acb3 3251 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3252 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3253 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3254
77fdaa12 3255 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3256
3257 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3258 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3259 else
3260 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3261}
3262
77fdaa12
JB		 3263/* scan finished notification */
3264void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3265{
31ee67a1 3266 struct ieee80211_sub_if_data *sdata;
60f8b39c 3267
77fdaa12
JB		 3268 /* Restart STA timers */
3269 rcu_read_lock();
3270 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3271 ieee80211_restart_sta_timer(sdata);
3272 rcu_read_unlock();
3273}
60f8b39c 3274
77fdaa12
JB		 3275int ieee80211_max_network_latency(struct notifier_block *nb,
3276 unsigned long data, void *dummy)
3277{
3278 s32 latency_usec = (s32) data;
3279 struct ieee80211_local *local =
3280 container_of(nb, struct ieee80211_local,
3281 network_latency_notifier);
1fa6f4af 3282
77fdaa12
JB		 3283 mutex_lock(&local->iflist_mtx);
3284 ieee80211_recalc_ps(local, latency_usec);
3285 mutex_unlock(&local->iflist_mtx);
dfe67012 3286
77fdaa12 3287 return 0;
9c6bd790
JB		 3288}
3289
f2d9d270
JB		 3290static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3291{
3292 u32 ret;
3293 int tmp;
3294
3295 switch (c->width) {
3296 case NL80211_CHAN_WIDTH_20:
3297 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3298 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3299 break;
3300 case NL80211_CHAN_WIDTH_40:
3301 c->width = NL80211_CHAN_WIDTH_20;
3302 c->center_freq1 = c->chan->center_freq;
3303 ret = IEEE80211_STA_DISABLE_40MHZ |
3304 IEEE80211_STA_DISABLE_VHT;
3305 break;
3306 case NL80211_CHAN_WIDTH_80:
3307 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3308 /* n_P40 */
3309 tmp /= 2;
3310 /* freq_P40 */
3311 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3312 c->width = NL80211_CHAN_WIDTH_40;
3313 ret = IEEE80211_STA_DISABLE_VHT;
3314 break;
3315 case NL80211_CHAN_WIDTH_80P80:
3316 c->center_freq2 = 0;
3317 c->width = NL80211_CHAN_WIDTH_80;
3318 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3319 IEEE80211_STA_DISABLE_160MHZ;
3320 break;
3321 case NL80211_CHAN_WIDTH_160:
3322 /* n_P20 */
3323 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3324 /* n_P80 */
3325 tmp /= 4;
3326 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3327 c->width = NL80211_CHAN_WIDTH_80;
3328 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3329 IEEE80211_STA_DISABLE_160MHZ;
3330 break;
3331 default:
3332 case NL80211_CHAN_WIDTH_20_NOHT:
3333 WARN_ON_ONCE(1);
3334 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3335 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3336 break;
3337 }
3338
3339 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3340
3341 return ret;
3342}
3343
3344static u32
3345ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3346 struct ieee80211_supported_band *sband,
3347 struct ieee80211_channel *channel,
3348 const struct ieee80211_ht_operation *ht_oper,
3349 const struct ieee80211_vht_operation *vht_oper,
3350 struct cfg80211_chan_def *chandef)
3351{
3352 struct cfg80211_chan_def vht_chandef;
3353 u32 ht_cfreq, ret;
3354
3355 chandef->chan = channel;
3356 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3357 chandef->center_freq1 = channel->center_freq;
3358 chandef->center_freq2 = 0;
3359
3360 if (!ht_oper || !sband->ht_cap.ht_supported) {
3361 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3362 goto out;
3363 }
3364
3365 chandef->width = NL80211_CHAN_WIDTH_20;
3366
3367 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3368 channel->band);
3369 /* check that channel matches the right operating channel */
3370 if (channel->center_freq != ht_cfreq) {
3371 /*
3372 * It's possible that some APs are confused here;
3373 * Netgear WNDR3700 sometimes reports 4 higher than
3374 * the actual channel in association responses, but
3375 * since we look at probe response/beacon data here
3376 * it should be OK.
3377 */
3378 sdata_info(sdata,
3379 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3380 channel->center_freq, ht_cfreq,
3381 ht_oper->primary_chan, channel->band);
3382 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3383 goto out;
3384 }
3385
3386 /* check 40 MHz support, if we have it */
3387 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3388 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3389 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3390 chandef->width = NL80211_CHAN_WIDTH_40;
3391 chandef->center_freq1 += 10;
3392 break;
3393 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3394 chandef->width = NL80211_CHAN_WIDTH_40;
3395 chandef->center_freq1 -= 10;
3396 break;
3397 }
3398 } else {
3399 /* 40 MHz (and 80 MHz) must be supported for VHT */
3400 ret = IEEE80211_STA_DISABLE_VHT;
3401 goto out;
3402 }
3403
3404 if (!vht_oper || !sband->vht_cap.vht_supported) {
3405 ret = IEEE80211_STA_DISABLE_VHT;
3406 goto out;
3407 }
3408
3409 vht_chandef.chan = channel;
3410 vht_chandef.center_freq1 =
3411 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3412 channel->band);
3413 vht_chandef.center_freq2 = 0;
3414
3415 if (vht_oper->center_freq_seg2_idx)
3416 vht_chandef.center_freq2 =
3417 ieee80211_channel_to_frequency(
3418 vht_oper->center_freq_seg2_idx,
3419 channel->band);
3420
3421 switch (vht_oper->chan_width) {
3422 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3423 vht_chandef.width = chandef->width;
3424 break;
3425 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3426 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3427 break;
3428 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3429 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3430 break;
3431 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3432 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3433 break;
3434 default:
3435 sdata_info(sdata,
3436 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3437 vht_oper->chan_width);
3438 ret = IEEE80211_STA_DISABLE_VHT;
3439 goto out;
3440 }
3441
3442 if (!cfg80211_chandef_valid(&vht_chandef)) {
3443 sdata_info(sdata,
3444 "AP VHT information is invalid, disable VHT\n");
3445 ret = IEEE80211_STA_DISABLE_VHT;
3446 goto out;
3447 }
3448
3449 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3450 ret = 0;
3451 goto out;
3452 }
3453
3454 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3455 sdata_info(sdata,
3456 "AP VHT information doesn't match HT, disable VHT\n");
3457 ret = IEEE80211_STA_DISABLE_VHT;
3458 goto out;
3459 }
3460
3461 *chandef = vht_chandef;
3462
3463 ret = 0;
3464
3465 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3466 IEEE80211_CHAN_DISABLED)) {
3467 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3468 ret = IEEE80211_STA_DISABLE_HT |
3469 IEEE80211_STA_DISABLE_VHT;
3470 goto out;
3471 }
3472
3473 ret = chandef_downgrade(chandef);
3474 }
3475
3476 if (chandef->width != vht_chandef.width)
3477 sdata_info(sdata,
3478 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3479
3480out:
3481 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3482 return ret;
3483}
3484
3485static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3486 struct cfg80211_bss *cbss)
3487{
3488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3489 const u8 *ht_cap_ie, *vht_cap_ie;
3490 const struct ieee80211_ht_cap *ht_cap;
3491 const struct ieee80211_vht_cap *vht_cap;
3492 u8 chains = 1;
3493
3494 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3495 return chains;
3496
9caf0364 3497 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3498 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3499 ht_cap = (void *)(ht_cap_ie + 2);
3500 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3501 /*
3502 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3503 * "Tx Unequal Modulation Supported" fields.
3504 */
3505 }
3506
3507 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3508 return chains;
3509
9caf0364 3510 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3511 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3512 u8 nss;
3513 u16 tx_mcs_map;
3514
3515 vht_cap = (void *)(vht_cap_ie + 2);
3516 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3517 for (nss = 8; nss > 0; nss--) {
3518 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3519 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3520 break;
3521 }
3522 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3523 chains = max(chains, nss);
3524 }
3525
3526 return chains;
3527}
3528
b17166a7
JB		 3529static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3530 struct cfg80211_bss *cbss)
a1cf775d
JB		 3531{
3532 struct ieee80211_local *local = sdata->local;
3533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3534 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3535 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3536 struct ieee80211_supported_band *sband;
4bf88530 3537 struct cfg80211_chan_def chandef;
f2d9d270 3538 int ret;
a1cf775d 3539
24398e39
JB		 3540 sband = local->hw.wiphy->bands[cbss->channel->band];
3541
f2d9d270
JB		 3542 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3543 IEEE80211_STA_DISABLE_80P80MHZ |
3544 IEEE80211_STA_DISABLE_160MHZ);
3545
9caf0364
JB		 3546 rcu_read_lock();
3547
f2d9d270
JB		 3548 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3549 sband->ht_cap.ht_supported) {
3550 const u8 *ht_oper_ie;
24398e39 3551
9caf0364 3552 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3553 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3554 ht_oper = (void *)(ht_oper_ie + 2);
3555 }
3556
f2d9d270
JB		 3557 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3558 sband->vht_cap.vht_supported) {
3559 const u8 *vht_oper_ie;
3560
9caf0364
JB		 3561 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3562 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3563 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3564 vht_oper = (void *)(vht_oper_ie + 2);
3565 if (vht_oper && !ht_oper) {
3566 vht_oper = NULL;
bdcbd8e0 3567 sdata_info(sdata,
f2d9d270
JB		 3568 "AP advertised VHT without HT, disabling both\n");
3569 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3570 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39
JB		 3571 }
3572 }
3573
f2d9d270
JB		 3574 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3575 cbss->channel,
3576 ht_oper, vht_oper,
3577 &chandef);
04ecd257 3578
f2d9d270
JB		 3579 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3580 local->rx_chains);
24398e39 3581
9caf0364
JB		 3582 rcu_read_unlock();
3583
04ecd257
JB		 3584 /* will change later if needed */
3585 sdata->smps_mode = IEEE80211_SMPS_OFF;
3586
f2d9d270
JB		 3587 /*
3588 * If this fails (possibly due to channel context sharing
3589 * on incompatible channels, e.g. 80+80 and 160 sharing the
3590 * same control channel) try to use a smaller bandwidth.
3591 */
3592 ret = ieee80211_vif_use_channel(sdata, &chandef,
3593 IEEE80211_CHANCTX_SHARED);
3594 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3595 ifmgd->flags |= chandef_downgrade(&chandef);
3596 return ret;
b17166a7
JB		 3597}
3598
3599static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3600 struct cfg80211_bss *cbss, bool assoc)
3601{
3602 struct ieee80211_local *local = sdata->local;
3603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3604 struct ieee80211_bss *bss = (void *)cbss->priv;
3605 struct sta_info *new_sta = NULL;
3606 bool have_sta = false;
3607 int err;
3608
3609 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3610 return -EINVAL;
3611
3612 if (assoc) {
3613 rcu_read_lock();
3614 have_sta = sta_info_get(sdata, cbss->bssid);
3615 rcu_read_unlock();
3616 }
3617
3618 if (!have_sta) {
3619 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3620 if (!new_sta)
3621 return -ENOMEM;
3622 }
3623
13e0c8e3 3624 if (new_sta) {
5d6a1b06
JB		 3625 u32 rates = 0, basic_rates = 0;
3626 bool have_higher_than_11mbit;
3627 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3628 struct ieee80211_supported_band *sband;
8cef2c9d 3629 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3630
3631 sband = local->hw.wiphy->bands[cbss->channel->band];
3632
3633 err = ieee80211_prep_channel(sdata, cbss);
3634 if (err) {
3635 sta_info_free(local, new_sta);
3636 return err;
3637 }
5d6a1b06 3638
5d6a1b06
JB		 3639 ieee80211_get_rates(sband, bss->supp_rates,
3640 bss->supp_rates_len,
3641 &rates, &basic_rates,
3642 &have_higher_than_11mbit,
3643 &min_rate, &min_rate_index);
3644
3645 /*
3646 * This used to be a workaround for basic rates missing
3647 * in the association response frame. Now that we no
3648 * longer use the basic rates from there, it probably
3649 * doesn't happen any more, but keep the workaround so
3650 * in case some *other* APs are buggy in different ways
3651 * we can connect -- with a warning.
3652 */
3653 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3654 sdata_info(sdata,
3655 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3656 basic_rates = BIT(min_rate_index);
3657 }
3658
13e0c8e3 3659 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3660 sdata->vif.bss_conf.basic_rates = basic_rates;
3661
3662 /* cf. IEEE 802.11 9.2.12 */
55de908a 3663 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3664 have_higher_than_11mbit)
3665 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3666 else
3667 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3668
3669 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3670
8c358bcd
JB		 3671 /* set timing information */
3672 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3673 rcu_read_lock();
ef429dad
JB		 3674 ies = rcu_dereference(cbss->beacon_ies);
3675 if (ies) {
3676 const u8 *tim_ie;
3677
3678 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3679 sdata->vif.bss_conf.sync_device_ts =
3680 bss->device_ts_beacon;
3681 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3682 ies->data, ies->len);
3683 if (tim_ie && tim_ie[1] >= 2)
3684 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3685 else
3686 sdata->vif.bss_conf.sync_dtim_count = 0;
3687 } else if (!(local->hw.flags &
3688 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3689 ies = rcu_dereference(cbss->proberesp_ies);
3690 /* must be non-NULL since beacon IEs were NULL */
3691 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3692 sdata->vif.bss_conf.sync_device_ts =
3693 bss->device_ts_presp;
3694 sdata->vif.bss_conf.sync_dtim_count = 0;
3695 } else {
3696 sdata->vif.bss_conf.sync_tsf = 0;
3697 sdata->vif.bss_conf.sync_device_ts = 0;
3698 sdata->vif.bss_conf.sync_dtim_count = 0;
3699 }
8cef2c9d 3700 rcu_read_unlock();
8c358bcd
JB		 3701
3702 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3703 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3704 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3705 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3706
3707 if (assoc)
13e0c8e3 3708 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3709
13e0c8e3
JB		 3710 err = sta_info_insert(new_sta);
3711 new_sta = NULL;
a1cf775d 3712 if (err) {
bdcbd8e0
JB		 3713 sdata_info(sdata,
3714 "failed to insert STA entry for the AP (error %d)\n",
3715 err);
a1cf775d
JB		 3716 return err;
3717 }
3718 } else
b203ca39 3719 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3720
3721 return 0;
3722}
3723
77fdaa12
JB		 3724/* config hooks */
3725int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3726 struct cfg80211_auth_request *req)
9c6bd790 3727{
66e67e41
JB		 3728 struct ieee80211_local *local = sdata->local;
3729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3730 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3731 u16 auth_alg;
66e67e41
JB		 3732 int err;
3733
3734 /* prepare auth data structure */
9c6bd790 3735
77fdaa12
JB		 3736 switch (req->auth_type) {
3737 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3738 auth_alg = WLAN_AUTH_OPEN;
3739 break;
3740 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3741 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3742 return -EOPNOTSUPP;
77fdaa12
JB		 3743 auth_alg = WLAN_AUTH_SHARED_KEY;
3744 break;
3745 case NL80211_AUTHTYPE_FT:
3746 auth_alg = WLAN_AUTH_FT;
3747 break;
3748 case NL80211_AUTHTYPE_NETWORK_EAP:
3749 auth_alg = WLAN_AUTH_LEAP;
3750 break;
6b8ece3a
JM		 3751 case NL80211_AUTHTYPE_SAE:
3752 auth_alg = WLAN_AUTH_SAE;
3753 break;
77fdaa12
JB		 3754 default:
3755 return -EOPNOTSUPP;
60f8b39c 3756 }
77fdaa12 3757
6b8ece3a
JM		 3758 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3759 req->ie_len, GFP_KERNEL);
66e67e41 3760 if (!auth_data)
9c6bd790 3761 return -ENOMEM;
77fdaa12 3762
66e67e41 3763 auth_data->bss = req->bss;
77fdaa12 3764
6b8ece3a
JM		 3765 if (req->sae_data_len >= 4) {
3766 __le16 *pos = (__le16 *) req->sae_data;
3767 auth_data->sae_trans = le16_to_cpu(pos[0]);
3768 auth_data->sae_status = le16_to_cpu(pos[1]);
3769 memcpy(auth_data->data, req->sae_data + 4,
3770 req->sae_data_len - 4);
3771 auth_data->data_len += req->sae_data_len - 4;
3772 }
3773
77fdaa12 3774 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3775 memcpy(&auth_data->data[auth_data->data_len],
3776 req->ie, req->ie_len);
3777 auth_data->data_len += req->ie_len;
9c6bd790 3778 }
77fdaa12 3779
fffd0934 3780 if (req->key && req->key_len) {
66e67e41
JB		 3781 auth_data->key_len = req->key_len;
3782 auth_data->key_idx = req->key_idx;
3783 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3784 }
3785
66e67e41 3786 auth_data->algorithm = auth_alg;
60f8b39c 3787
66e67e41 3788 /* try to authenticate/probe */
2a33bee2 3789
66e67e41 3790 mutex_lock(&ifmgd->mtx);
2a33bee2 3791
66e67e41
JB		 3792 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3793 ifmgd->assoc_data) {
3794 err = -EBUSY;
3795 goto err_free;
2a33bee2
GE		 3796 }
3797
66e67e41
JB		 3798 if (ifmgd->auth_data)
3799 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3800
66e67e41
JB		 3801 /* prep auth_data so we don't go into idle on disassoc */
3802 ifmgd->auth_data = auth_data;
af6b6374 3803
66e67e41 3804 if (ifmgd->associated)
37ad3888 3805 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3806
bdcbd8e0 3807 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3808
a1cf775d
JB		 3809 err = ieee80211_prep_connection(sdata, req->bss, false);
3810 if (err)
66e67e41 3811 goto err_clear;
af6b6374 3812
66e67e41
JB		 3813 err = ieee80211_probe_auth(sdata);
3814 if (err) {
66e67e41
JB		 3815 sta_info_destroy_addr(sdata, req->bss->bssid);
3816 goto err_clear;
3817 }
3818
3819 /* hold our own reference */
5b112d3d 3820 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3821 err = 0;
3822 goto out_unlock;
3823
3824 err_clear:
3d2abdfd
EP		 3825 memset(ifmgd->bssid, 0, ETH_ALEN);
3826 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3827 ifmgd->auth_data = NULL;
3828 err_free:
3829 kfree(auth_data);
3830 out_unlock:
3831 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3832
66e67e41 3833 return err;
af6b6374
JB		 3834}
3835
77fdaa12
JB		 3836int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3837 struct cfg80211_assoc_request *req)
f0706e82 3838{
66e67e41 3839 struct ieee80211_local *local = sdata->local;
77fdaa12 3840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3841 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3842 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3843 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3844 struct ieee80211_supported_band *sband;
b08fbbd8 3845 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3846 int i, err;
f0706e82 3847
66e67e41
JB		 3848 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3849 if (!assoc_data)
3850 return -ENOMEM;
3851
9caf0364
JB		 3852 rcu_read_lock();
3853 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3854 if (!ssidie) {
3855 rcu_read_unlock();
3856 kfree(assoc_data);
3857 return -EINVAL;
3858 }
3859 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3860 assoc_data->ssid_len = ssidie[1];
3861 rcu_read_unlock();
3862
77fdaa12 3863 mutex_lock(&ifmgd->mtx);
9c87ba67 3864
66e67e41 3865 if (ifmgd->associated)
37ad3888 3866 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3867
3868 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3869 err = -EBUSY;
3870 goto err_free;
af6b6374 3871 }
77fdaa12 3872
66e67e41
JB		 3873 if (ifmgd->assoc_data) {
3874 err = -EBUSY;
3875 goto err_free;
3876 }
77fdaa12 3877
66e67e41
JB		 3878 if (ifmgd->auth_data) {
3879 bool match;
3880
3881 /* keep sta info, bssid if matching */
b203ca39 3882 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3883 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3884 }
3885
66e67e41 3886 /* prepare assoc data */
19c3b830 3887
d8ec4433
JO		 3888 ifmgd->beacon_crc_valid = false;
3889
de5036aa
JB		 3890 /*
3891 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3892 * We still associate in non-HT mode (11a/b/g) if any one of these
3893 * ciphers is configured as pairwise.
3894 * We can set this to true for non-11n hardware, that'll be checked
3895 * separately along with the peer capabilities.
3896 */
1c4cb928 3897 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3898 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3899 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3900 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3901 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3902 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3903 netdev_info(sdata->dev,
d545daba 3904 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3905 }
3906 }
77fdaa12 3907
d545daba 3908 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3909 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3910 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3911 }
ef96a842 3912
4e74bfdb
JB		 3913 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3914 sband = local->hw.wiphy->bands[req->bss->channel->band];
3915 if (!sband->ht_cap.ht_supported ||
1c4cb928 3916 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3917 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3918 if (!bss->wmm_used)
3919 netdev_info(sdata->dev,
3920 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3921 }
4e74bfdb 3922
d545daba
MP		 3923 /* disable VHT if we don't support it or the AP doesn't use WMM */
3924 if (!sband->vht_cap.vht_supported ||
3925 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3926 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3927 if (!bss->wmm_used)
3928 netdev_info(sdata->dev,
3929 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3930 }
3931
ef96a842
BG		 3932 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3933 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3934 sizeof(ifmgd->ht_capa_mask));
3935
77fdaa12 3936 if (req->ie && req->ie_len) {
66e67e41
JB		 3937 memcpy(assoc_data->ie, req->ie, req->ie_len);
3938 assoc_data->ie_len = req->ie_len;
3939 }
f679f65d 3940
66e67e41 3941 assoc_data->bss = req->bss;
f679f65d 3942
af6b6374
JB		 3943 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3944 if (ifmgd->powersave)
04ecd257 3945 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3946 else
04ecd257 3947 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3948 } else
04ecd257 3949 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3950
66e67e41 3951 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3952 assoc_data->wmm = bss->wmm_used &&
3953 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3954 assoc_data->supp_rates = bss->supp_rates;
3955 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 3956
9caf0364 3957 rcu_read_lock();
9dde6423
JB		 3958 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3959 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3960 assoc_data->ap_ht_param =
3961 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3962 else
a8243b72 3963 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 3964 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3965 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3966 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3967 sizeof(struct ieee80211_vht_cap));
3968 else
3969 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 3970 rcu_read_unlock();
63f170e0 3971
ab13315a
KV		 3972 if (bss->wmm_used && bss->uapsd_supported &&
3973 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3974 assoc_data->uapsd = true;
ab13315a
KV		 3975 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3976 } else {
76f0303d 3977 assoc_data->uapsd = false;
ab13315a
KV		 3978 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3979 }
3980
77fdaa12 3981 if (req->prev_bssid)
66e67e41 3982 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3983
3984 if (req->use_mfp) {
3985 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3986 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3987 } else {
3988 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3989 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3990 }
3991
3992 if (req->crypto.control_port)
3993 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3994 else
3995 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3996
a621fa4d
JB		 3997 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3998 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3999
66e67e41
JB		 4000 /* kick off associate process */
4001
4002 ifmgd->assoc_data = assoc_data;
826262c3 4003 ifmgd->dtim_period = 0;
66e67e41 4004
a1cf775d
JB		 4005 err = ieee80211_prep_connection(sdata, req->bss, true);
4006 if (err)
4007 goto err_clear;
66e67e41 4008
c65dd147
EG		 4009 rcu_read_lock();
4010 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4011
c65dd147
EG		 4012 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4013 !beacon_ies) {
4014 /*
4015 * Wait up to one beacon interval ...
4016 * should this be more if we miss one?
4017 */
4018 sdata_info(sdata, "waiting for beacon from %pM\n",
4019 ifmgd->bssid);
4020 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4021 assoc_data->need_beacon = true;
4022 } else if (beacon_ies) {
4023 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4024 beacon_ies->data,
4025 beacon_ies->len);
ef429dad
JB		 4026 u8 dtim_count = 0;
4027
c65dd147
EG		 4028 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4029 const struct ieee80211_tim_ie *tim;
4030 tim = (void *)(tim_ie + 2);
4031 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4032 dtim_count = tim->dtim_count;
826262c3 4033 }
66e67e41 4034 assoc_data->have_beacon = true;
66e67e41 4035 assoc_data->timeout = jiffies;
ef429dad
JB		 4036
4037 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4038 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4039 sdata->vif.bss_conf.sync_device_ts =
4040 bss->device_ts_beacon;
4041 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4042 }
c65dd147
EG		 4043 } else {
4044 assoc_data->timeout = jiffies;
66e67e41 4045 }
c65dd147
EG		 4046 rcu_read_unlock();
4047
66e67e41
JB		 4048 run_again(ifmgd, assoc_data->timeout);
4049
fcff4f10
PS		 4050 if (bss->corrupt_data) {
4051 char *corrupt_type = "data";
4052 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4053 if (bss->corrupt_data &
4054 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4055 corrupt_type = "beacon and probe response";
4056 else
4057 corrupt_type = "beacon";
4058 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4059 corrupt_type = "probe response";
bdcbd8e0
JB		 4060 sdata_info(sdata, "associating with AP with corrupt %s\n",
4061 corrupt_type);
fcff4f10
PS		 4062 }
4063
66e67e41
JB		 4064 err = 0;
4065 goto out;
4066 err_clear:
3d2abdfd
EP		 4067 memset(ifmgd->bssid, 0, ETH_ALEN);
4068 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4069 ifmgd->assoc_data = NULL;
4070 err_free:
4071 kfree(assoc_data);
4072 out:
4073 mutex_unlock(&ifmgd->mtx);
4074
4075 return err;
f0706e82
JB		 4076}
4077
77fdaa12 4078int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4079 struct cfg80211_deauth_request *req)
f0706e82 4080{
46900298 4081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4082 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4083 bool tx = !req->local_state_change;
86552017 4084 bool sent_frame = false;
f0706e82 4085
77fdaa12
JB		 4086 mutex_lock(&ifmgd->mtx);
4087
bdcbd8e0
JB		 4088 sdata_info(sdata,
4089 "deauthenticating from %pM by local choice (reason=%d)\n",
4090 req->bssid, req->reason_code);
0ff71613 4091
86552017 4092 if (ifmgd->auth_data) {
8c7d857c 4093 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4094 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4095 IEEE80211_STYPE_DEAUTH,
6863255b 4096 req->reason_code, tx,
37ad3888 4097 frame_buf);
86552017
JB		 4098 ieee80211_destroy_auth_data(sdata, false);
4099 mutex_unlock(&ifmgd->mtx);
4100
4101 sent_frame = tx;
4102 goto out;
8c7d857c
EG		 4103 }
4104
86552017
JB		 4105 if (ifmgd->associated &&
4106 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4107 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4108 req->reason_code, tx, frame_buf);
4109 sent_frame = tx;
4110 }
37ad3888
JB		 4111 mutex_unlock(&ifmgd->mtx);
4112
86552017 4113 out:
86552017
JB		 4114 if (sent_frame)
4115 __cfg80211_send_deauth(sdata->dev, frame_buf,
4116 IEEE80211_DEAUTH_FRAME_LEN);
4117
f0706e82
JB		 4118 return 0;
4119}
84363e6e 4120
77fdaa12 4121int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4122 struct cfg80211_disassoc_request *req)
9c6bd790 4123{
77fdaa12 4124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4125 u8 bssid[ETH_ALEN];
6ae16775 4126 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4127
77fdaa12 4128 mutex_lock(&ifmgd->mtx);
10f644a4 4129
8d8b261a
JB		 4130 /*
4131 * cfg80211 should catch this ... but it's racy since
4132 * we can receive a disassoc frame, process it, hand it
4133 * to cfg80211 while that's in a locked section already
4134 * trying to tell us that the user wants to disconnect.
4135 */
0c1ad2ca 4136 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4137 mutex_unlock(&ifmgd->mtx);
4138 return -ENOLINK;
4139 }
4140
bdcbd8e0
JB		 4141 sdata_info(sdata,
4142 "disassociating from %pM by local choice (reason=%d)\n",
4143 req->bss->bssid, req->reason_code);
0ff71613 4144
e69e95db 4145 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4146 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4147 req->reason_code, !req->local_state_change,
4148 frame_buf);
77fdaa12 4149 mutex_unlock(&ifmgd->mtx);
10f644a4 4150
6ae16775
AQ		 4151 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4152 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4153
10f644a4
JB		 4154 return 0;
4155}
026331c4 4156
afa762f6 4157void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4158{
4159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4160
4161 mutex_lock(&ifmgd->mtx);
4162 if (ifmgd->assoc_data)
4163 ieee80211_destroy_assoc_data(sdata, false);
4164 if (ifmgd->auth_data)
4165 ieee80211_destroy_auth_data(sdata, false);
4166 del_timer_sync(&ifmgd->timer);
4167 mutex_unlock(&ifmgd->mtx);
4168}
4169
a97c13c3
JO		 4170void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4171 enum nl80211_cqm_rssi_threshold_event rssi_event,
4172 gfp_t gfp)
4173{
4174 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4175
b5878a2d
JB		 4176 trace_api_cqm_rssi_notify(sdata, rssi_event);
4177
a97c13c3
JO		 4178 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4179}
4180EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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