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mac80211: send deauth when connection is lost
[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
62ae67be 688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 689 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
690 IEEE80211_STA_CONNECTION_POLL))
691 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
692
62ae67be 693 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 694}
695
d524215f
FF		 696static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata)
698{
699 struct sk_buff *skb;
700 struct ieee80211_hdr *nullfunc;
701 __le16 fc;
702
703 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
704 return;
705
706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 707 if (!skb)
d524215f 708 return;
d15b8459 709
d524215f
FF		 710 skb_reserve(skb, local->hw.extra_tx_headroom);
711
712 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
713 memset(nullfunc, 0, 30);
714 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
715 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
716 nullfunc->frame_control = fc;
717 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
718 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
719 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
720 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
721
722 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
723 ieee80211_tx_skb(sdata, skb);
724}
725
cc32abd4
JB		 726/* spectrum management related things */
727static void ieee80211_chswitch_work(struct work_struct *work)
728{
729 struct ieee80211_sub_if_data *sdata =
730 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732
9607e6b6 733 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 734 return;
735
77fdaa12
JB		 736 mutex_lock(&ifmgd->mtx);
737 if (!ifmgd->associated)
738 goto out;
cc32abd4 739
55de908a 740 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 741 if (!sdata->local->ops->channel_switch) {
742 /* call "hw_config" only if doing sw channel switch */
743 ieee80211_hw_config(sdata->local,
744 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 745 } else {
746 /* update the device channel directly */
55de908a 747 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 748 }
77fdaa12 749
cc32abd4 750 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 751 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 752
57eebdf3 753 /* XXX: wait for a beacon first? */
cc32abd4
JB		 754 ieee80211_wake_queues_by_reason(&sdata->local->hw,
755 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 756 out:
757 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
758 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 759}
760
5ce6e438
JB		 761void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
762{
55de908a
JB		 763 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 765
766 trace_api_chswitch_done(sdata, success);
767 if (!success) {
882a7c69
JB		 768 sdata_info(sdata,
769 "driver channel switch failed, disconnecting\n");
770 ieee80211_queue_work(&sdata->local->hw,
771 &ifmgd->csa_connection_drop_work);
772 } else {
773 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 774 }
5ce6e438
JB		 775}
776EXPORT_SYMBOL(ieee80211_chswitch_done);
777
cc32abd4
JB		 778static void ieee80211_chswitch_timer(unsigned long data)
779{
780 struct ieee80211_sub_if_data *sdata =
781 (struct ieee80211_sub_if_data *) data;
782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
783
5bb644a0
JB		 784 if (sdata->local->quiescing) {
785 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
786 return;
787 }
788
42935eca 789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 790}
791
792void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
793 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 794 struct ieee80211_bss *bss,
795 u64 timestamp)
cc32abd4 796{
0c1ad2ca
JB		 797 struct cfg80211_bss *cbss =
798 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 799 struct ieee80211_channel *new_ch;
800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 801 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
802 cbss->channel->band);
55de908a 803 struct ieee80211_chanctx *chanctx;
cc32abd4 804
77fdaa12
JB		 805 ASSERT_MGD_MTX(ifmgd);
806
807 if (!ifmgd->associated)
cc32abd4
JB		 808 return;
809
fbe9c429 810 if (sdata->local->scanning)
cc32abd4
JB		 811 return;
812
813 /* Disregard subsequent beacons if we are already running a timer
814 processing a CSA */
815
816 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
817 return;
818
819 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 820 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
821 sdata_info(sdata,
822 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
823 ifmgd->associated->bssid, new_freq);
824 ieee80211_queue_work(&sdata->local->hw,
825 &ifmgd->csa_connection_drop_work);
cc32abd4 826 return;
882a7c69 827 }
cc32abd4 828
57eebdf3
JB		 829 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
830
55de908a
JB		 831 if (sdata->local->use_chanctx) {
832 sdata_info(sdata,
833 "not handling channel switch with channel contexts\n");
834 ieee80211_queue_work(&sdata->local->hw,
835 &ifmgd->csa_connection_drop_work);
246dc3fd 836 return;
55de908a
JB		 837 }
838
839 mutex_lock(&sdata->local->chanctx_mtx);
840 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
841 mutex_unlock(&sdata->local->chanctx_mtx);
842 return;
843 }
844 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
845 struct ieee80211_chanctx, conf);
846 if (chanctx->refcount > 1) {
847 sdata_info(sdata,
848 "channel switch with multiple interfaces on the same channel, disconnecting\n");
849 ieee80211_queue_work(&sdata->local->hw,
850 &ifmgd->csa_connection_drop_work);
851 mutex_unlock(&sdata->local->chanctx_mtx);
852 return;
853 }
854 mutex_unlock(&sdata->local->chanctx_mtx);
855
856 sdata->local->csa_channel = new_ch;
857
57eebdf3
JB		 858 if (sw_elem->mode)
859 ieee80211_stop_queues_by_reason(&sdata->local->hw,
860 IEEE80211_QUEUE_STOP_REASON_CSA);
861
5ce6e438
JB		 862 if (sdata->local->ops->channel_switch) {
863 /* use driver's channel switch callback */
57eebdf3
JB		 864 struct ieee80211_channel_switch ch_switch = {
865 .timestamp = timestamp,
866 .block_tx = sw_elem->mode,
867 .channel = new_ch,
868 .count = sw_elem->count,
869 };
870
5ce6e438
JB		 871 drv_channel_switch(sdata->local, &ch_switch);
872 return;
873 }
874
875 /* channel switch handled in software */
57eebdf3 876 if (sw_elem->count <= 1)
42935eca 877 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 878 else
cc32abd4 879 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 880 TU_TO_EXP_TIME(sw_elem->count *
881 cbss->beacon_interval));
cc32abd4
JB		 882}
883
1ea6f9c0
JB		 884static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
885 struct ieee80211_channel *channel,
886 const u8 *country_ie, u8 country_ie_len,
887 const u8 *pwr_constr_elem)
cc32abd4 888{
04b7b2ff
JB		 889 struct ieee80211_country_ie_triplet *triplet;
890 int chan = ieee80211_frequency_to_channel(channel->center_freq);
891 int i, chan_pwr, chan_increment, new_ap_level;
892 bool have_chan_pwr = false;
cc32abd4 893
04b7b2ff
JB		 894 /* Invalid IE */
895 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 896 return 0;
cc32abd4 897
04b7b2ff
JB		 898 triplet = (void *)(country_ie + 3);
899 country_ie_len -= 3;
900
901 switch (channel->band) {
902 default:
903 WARN_ON_ONCE(1);
904 /* fall through */
905 case IEEE80211_BAND_2GHZ:
906 case IEEE80211_BAND_60GHZ:
907 chan_increment = 1;
908 break;
909 case IEEE80211_BAND_5GHZ:
910 chan_increment = 4;
911 break;
cc32abd4 912 }
04b7b2ff
JB		 913
914 /* find channel */
915 while (country_ie_len >= 3) {
916 u8 first_channel = triplet->chans.first_channel;
917
918 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
919 goto next;
920
921 for (i = 0; i < triplet->chans.num_channels; i++) {
922 if (first_channel + i * chan_increment == chan) {
923 have_chan_pwr = true;
924 chan_pwr = triplet->chans.max_power;
925 break;
926 }
927 }
928 if (have_chan_pwr)
929 break;
930
931 next:
932 triplet++;
933 country_ie_len -= 3;
934 }
935
936 if (!have_chan_pwr)
1ea6f9c0 937 return 0;
04b7b2ff
JB		 938
939 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
940
1ea6f9c0
JB		 941 if (sdata->ap_power_level == new_ap_level)
942 return 0;
04b7b2ff
JB		 943
944 sdata_info(sdata,
945 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
946 new_ap_level, chan_pwr, *pwr_constr_elem,
947 sdata->u.mgd.bssid);
1ea6f9c0
JB		 948 sdata->ap_power_level = new_ap_level;
949 if (__ieee80211_recalc_txpower(sdata))
950 return BSS_CHANGED_TXPOWER;
951 return 0;
cc32abd4
JB		 952}
953
f90754c1
JO		 954void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
955{
956 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
957 struct ieee80211_local *local = sdata->local;
958 struct ieee80211_conf *conf = &local->hw.conf;
959
960 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
961 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
962 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
963
964 local->disable_dynamic_ps = false;
965 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
966}
967EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
968
969void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
970{
971 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
972 struct ieee80211_local *local = sdata->local;
973 struct ieee80211_conf *conf = &local->hw.conf;
974
975 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
976 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
977 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
978
979 local->disable_dynamic_ps = true;
980 conf->dynamic_ps_timeout = 0;
981 del_timer_sync(&local->dynamic_ps_timer);
982 ieee80211_queue_work(&local->hw,
983 &local->dynamic_ps_enable_work);
984}
985EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
986
965bedad
JB		 987/* powersave */
988static void ieee80211_enable_ps(struct ieee80211_local *local,
989 struct ieee80211_sub_if_data *sdata)
990{
991 struct ieee80211_conf *conf = &local->hw.conf;
992
d5edaedc
JB		 993 /*
994 * If we are scanning right now then the parameters will
995 * take effect when scan finishes.
996 */
fbe9c429 997 if (local->scanning)
d5edaedc
JB		 998 return;
999
965bedad
JB		 1000 if (conf->dynamic_ps_timeout > 0 &&
1001 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1002 mod_timer(&local->dynamic_ps_timer, jiffies +
1003 msecs_to_jiffies(conf->dynamic_ps_timeout));
1004 } else {
1005 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1006 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1007
2a13052f
JO		 1008 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1009 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1010 return;
1011
1012 conf->flags |= IEEE80211_CONF_PS;
1013 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1014 }
1015}
1016
1017static void ieee80211_change_ps(struct ieee80211_local *local)
1018{
1019 struct ieee80211_conf *conf = &local->hw.conf;
1020
1021 if (local->ps_sdata) {
965bedad
JB		 1022 ieee80211_enable_ps(local, local->ps_sdata);
1023 } else if (conf->flags & IEEE80211_CONF_PS) {
1024 conf->flags &= ~IEEE80211_CONF_PS;
1025 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1026 del_timer_sync(&local->dynamic_ps_timer);
1027 cancel_work_sync(&local->dynamic_ps_enable_work);
1028 }
1029}
1030
808118cb
JY		 1031static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1032{
1033 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1034 struct sta_info *sta = NULL;
c2c98fde 1035 bool authorized = false;
808118cb
JY		 1036
1037 if (!mgd->powersave)
1038 return false;
1039
05cb9108
JB		 1040 if (mgd->broken_ap)
1041 return false;
1042
808118cb
JY		 1043 if (!mgd->associated)
1044 return false;
1045
808118cb
JY		 1046 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1047 IEEE80211_STA_CONNECTION_POLL))
1048 return false;
1049
1050 rcu_read_lock();
1051 sta = sta_info_get(sdata, mgd->bssid);
1052 if (sta)
c2c98fde 1053 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1054 rcu_read_unlock();
1055
c2c98fde 1056 return authorized;
808118cb
JY		 1057}
1058
965bedad 1059/* need to hold RTNL or interface lock */
10f644a4 1060void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1061{
1062 struct ieee80211_sub_if_data *sdata, *found = NULL;
1063 int count = 0;
195e294d 1064 int timeout;
965bedad
JB		 1065
1066 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1067 local->ps_sdata = NULL;
1068 return;
1069 }
1070
1071 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1072 if (!ieee80211_sdata_running(sdata))
965bedad 1073 continue;
8c7914de
RM		 1074 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1075 /* If an AP vif is found, then disable PS
1076 * by setting the count to zero thereby setting
1077 * ps_sdata to NULL.
1078 */
1079 count = 0;
1080 break;
1081 }
965bedad
JB		 1082 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1083 continue;
1084 found = sdata;
1085 count++;
1086 }
1087
808118cb 1088 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1089 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1090 s32 beaconint_us;
1091
1092 if (latency < 0)
ed77134b 1093 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1094
1095 beaconint_us = ieee80211_tu_to_usec(
1096 found->vif.bss_conf.beacon_int);
1097
ff616381 1098 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1099 if (timeout < 0) {
1100 /*
ff616381
JO		 1101 * Go to full PSM if the user configures a very low
1102 * latency requirement.
0ab82b04
EP		 1103 * The 2000 second value is there for compatibility
1104 * until the PM_QOS_NETWORK_LATENCY is configured
1105 * with real values.
195e294d 1106 */
0ab82b04
EP		 1107 if (latency > (1900 * USEC_PER_MSEC) &&
1108 latency != (2000 * USEC_PER_SEC))
195e294d 1109 timeout = 0;
ff616381
JO		 1110 else
1111 timeout = 100;
195e294d 1112 }
f90754c1
JO		 1113 local->dynamic_ps_user_timeout = timeout;
1114 if (!local->disable_dynamic_ps)
1115 conf->dynamic_ps_timeout =
1116 local->dynamic_ps_user_timeout;
195e294d 1117
04fe2037 1118 if (beaconint_us > latency) {
10f644a4 1119 local->ps_sdata = NULL;
04fe2037 1120 } else {
04fe2037 1121 int maxslp = 1;
826262c3 1122 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1123
1124 /* If the TIM IE is invalid, pretend the value is 1 */
1125 if (!dtimper)
1126 dtimper = 1;
1127 else if (dtimper > 1)
04fe2037
JB		 1128 maxslp = min_t(int, dtimper,
1129 latency / beaconint_us);
1130
9ccebe61 1131 local->hw.conf.max_sleep_period = maxslp;
56007a02 1132 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1133 local->ps_sdata = found;
04fe2037 1134 }
10f644a4 1135 } else {
965bedad 1136 local->ps_sdata = NULL;
10f644a4 1137 }
965bedad
JB		 1138
1139 ieee80211_change_ps(local);
1140}
1141
ab095877
EP		 1142void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1143{
1144 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1145
1146 if (sdata->vif.bss_conf.ps != ps_allowed) {
1147 sdata->vif.bss_conf.ps = ps_allowed;
1148 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1149 }
1150}
1151
965bedad
JB		 1152void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1153{
1154 struct ieee80211_local *local =
1155 container_of(work, struct ieee80211_local,
1156 dynamic_ps_disable_work);
1157
1158 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1159 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1160 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1161 }
1162
1163 ieee80211_wake_queues_by_reason(&local->hw,
1164 IEEE80211_QUEUE_STOP_REASON_PS);
1165}
1166
1167void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1168{
1169 struct ieee80211_local *local =
1170 container_of(work, struct ieee80211_local,
1171 dynamic_ps_enable_work);
1172 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1173 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1174 unsigned long flags;
1175 int q;
965bedad
JB		 1176
1177 /* can only happen when PS was just disabled anyway */
1178 if (!sdata)
1179 return;
1180
5e34069c
CL		 1181 ifmgd = &sdata->u.mgd;
1182
965bedad
JB		 1183 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1184 return;
1185
77b7023a
AN		 1186 if (!local->disable_dynamic_ps &&
1187 local->hw.conf.dynamic_ps_timeout > 0) {
1188 /* don't enter PS if TX frames are pending */
1189 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1190 mod_timer(&local->dynamic_ps_timer, jiffies +
1191 msecs_to_jiffies(
1192 local->hw.conf.dynamic_ps_timeout));
1193 return;
1194 }
77b7023a
AN		 1195
1196 /*
1197 * transmission can be stopped by others which leads to
1198 * dynamic_ps_timer expiry. Postpone the ps timer if it
1199 * is not the actual idle state.
1200 */
1201 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1202 for (q = 0; q < local->hw.queues; q++) {
1203 if (local->queue_stop_reasons[q]) {
1204 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1205 flags);
1206 mod_timer(&local->dynamic_ps_timer, jiffies +
1207 msecs_to_jiffies(
1208 local->hw.conf.dynamic_ps_timeout));
1209 return;
1210 }
1211 }
1212 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1213 }
1ddc2867 1214
375177bf 1215 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1216 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1217 netif_tx_stop_all_queues(sdata->dev);
965bedad 1218
e8306f98
VN		 1219 if (drv_tx_frames_pending(local))
1220 mod_timer(&local->dynamic_ps_timer, jiffies +
1221 msecs_to_jiffies(
1222 local->hw.conf.dynamic_ps_timeout));
1223 else {
1224 ieee80211_send_nullfunc(local, sdata, 1);
1225 /* Flush to get the tx status of nullfunc frame */
1226 drv_flush(local, false);
1227 }
f3e85b9e
VN		 1228 }
1229
2a13052f
JO		 1230 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1231 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1232 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1233 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1234 local->hw.conf.flags |= IEEE80211_CONF_PS;
1235 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1236 }
f3e85b9e 1237
77b7023a
AN		 1238 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1239 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1240}
1241
1242void ieee80211_dynamic_ps_timer(unsigned long data)
1243{
1244 struct ieee80211_local *local = (void *) data;
1245
78f1a8b7 1246 if (local->quiescing || local->suspended)
5bb644a0
JB		 1247 return;
1248
42935eca 1249 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1250}
1251
60f8b39c 1252/* MLME */
7d25745d 1253static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1254 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1255 u8 *wmm_param, size_t wmm_param_len)
1256{
f0706e82 1257 struct ieee80211_tx_queue_params params;
4ced3f74 1258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1259 size_t left;
1260 int count;
ab13315a 1261 u8 *pos, uapsd_queues = 0;
f0706e82 1262
e1b3ec1a 1263 if (!local->ops->conf_tx)
7d25745d 1264 return false;
e1b3ec1a 1265
32c5057b 1266 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1267 return false;
3434fbd3
JB		 1268
1269 if (!wmm_param)
7d25745d 1270 return false;
3434fbd3 1271
f0706e82 1272 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1273 return false;
ab13315a
KV		 1274
1275 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1276 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1277
f0706e82 1278 count = wmm_param[6] & 0x0f;
46900298 1279 if (count == ifmgd->wmm_last_param_set)
7d25745d 1280 return false;
46900298 1281 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1282
1283 pos = wmm_param + 8;
1284 left = wmm_param_len - 8;
1285
1286 memset(&params, 0, sizeof(params));
1287
00e96dec 1288 sdata->wmm_acm = 0;
f0706e82
JB		 1289 for (; left >= 4; left -= 4, pos += 4) {
1290 int aci = (pos[0] >> 5) & 0x03;
1291 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1292 bool uapsd = false;
f0706e82
JB		 1293 int queue;
1294
1295 switch (aci) {
0eeb59fe 1296 case 1: /* AC_BK */
e100bb64 1297 queue = 3;
988c0f72 1298 if (acm)
00e96dec 1299 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1300 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1301 uapsd = true;
f0706e82 1302 break;
0eeb59fe 1303 case 2: /* AC_VI */
e100bb64 1304 queue = 1;
988c0f72 1305 if (acm)
00e96dec 1306 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1307 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1308 uapsd = true;
f0706e82 1309 break;
0eeb59fe 1310 case 3: /* AC_VO */
e100bb64 1311 queue = 0;
988c0f72 1312 if (acm)
00e96dec 1313 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1314 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1315 uapsd = true;
f0706e82 1316 break;
0eeb59fe 1317 case 0: /* AC_BE */
f0706e82 1318 default:
e100bb64 1319 queue = 2;
988c0f72 1320 if (acm)
00e96dec 1321 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1322 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1323 uapsd = true;
f0706e82
JB		 1324 break;
1325 }
1326
1327 params.aifs = pos[0] & 0x0f;
1328 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1329 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1330 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1331 params.uapsd = uapsd;
1332
bdcbd8e0
JB		 1333 mlme_dbg(sdata,
1334 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1335 queue, aci, acm,
1336 params.aifs, params.cw_min, params.cw_max,
1337 params.txop, params.uapsd);
f6f3def3
EP		 1338 sdata->tx_conf[queue] = params;
1339 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1340 sdata_err(sdata,
1341 "failed to set TX queue parameters for queue %d\n",
1342 queue);
f0706e82 1343 }
e1b3ec1a
SG		 1344
1345 /* enable WMM or activate new settings */
4ced3f74 1346 sdata->vif.bss_conf.qos = true;
7d25745d 1347 return true;
f0706e82
JB		 1348}
1349
925e64c3
SG		 1350static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1351{
1352 lockdep_assert_held(&sdata->local->mtx);
1353
1354 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1355 IEEE80211_STA_BEACON_POLL);
1356 ieee80211_run_deferred_scan(sdata->local);
1357}
1358
1359static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1360{
1361 mutex_lock(&sdata->local->mtx);
1362 __ieee80211_stop_poll(sdata);
1363 mutex_unlock(&sdata->local->mtx);
1364}
1365
7a5158ef
JB		 1366static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1367 u16 capab, bool erp_valid, u8 erp)
5628221c 1368{
bda3933a 1369 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1370 u32 changed = 0;
7a5158ef
JB		 1371 bool use_protection;
1372 bool use_short_preamble;
1373 bool use_short_slot;
1374
1375 if (erp_valid) {
1376 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1377 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1378 } else {
1379 use_protection = false;
1380 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1381 }
1382
1383 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1384 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1385 use_short_slot = true;
5628221c 1386
471b3efd 1387 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1388 bss_conf->use_cts_prot = use_protection;
1389 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1390 }
7e9ed188 1391
d43c7b37 1392 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1393 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1394 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1395 }
d9430a32 1396
7a5158ef 1397 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1398 bss_conf->use_short_slot = use_short_slot;
1399 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1400 }
1401
1402 return changed;
1403}
1404
f698d856 1405static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1406 struct cfg80211_bss *cbss,
ae5eb026 1407 u32 bss_info_changed)
f0706e82 1408{
0c1ad2ca 1409 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1410 struct ieee80211_local *local = sdata->local;
68542962 1411 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1412
ae5eb026 1413 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1414 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1415 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1416
7ccc8bd7
FF		 1417 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1418 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1419
0c1ad2ca
JB		 1420 sdata->u.mgd.associated = cbss;
1421 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1422
17e4ec14
JM		 1423 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1424
488dd7b5 1425 if (sdata->vif.p2p) {
9caf0364 1426 const struct cfg80211_bss_ies *ies;
488dd7b5 1427
9caf0364
JB		 1428 rcu_read_lock();
1429 ies = rcu_dereference(cbss->ies);
1430 if (ies) {
1431 u8 noa[2];
1432 int ret;
1433
1434 ret = cfg80211_get_p2p_attr(
1435 ies->data, ies->len,
1436 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1437 noa, sizeof(noa));
1438 if (ret >= 2) {
1439 bss_conf->p2p_oppps = noa[1] & 0x80;
1440 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1441 bss_info_changed |= BSS_CHANGED_P2P_PS;
1442 sdata->u.mgd.p2p_noa_index = noa[0];
1443 }
488dd7b5 1444 }
9caf0364 1445 rcu_read_unlock();
488dd7b5
JB		 1446 }
1447
b291ba11 1448 /* just to be sure */
925e64c3 1449 ieee80211_stop_poll(sdata);
b291ba11 1450
9ac19a90 1451 ieee80211_led_assoc(local, 1);
9306102e 1452
c65dd147 1453 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1454 /*
1455 * If the AP is buggy we may get here with no DTIM period
1456 * known, so assume it's 1 which is the only safe assumption
1457 * in that case, although if the TIM IE is broken powersave
1458 * probably just won't work at all.
1459 */
1460 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1461 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1462 } else {
e5b900d2 1463 bss_conf->dtim_period = 0;
826262c3 1464 }
e5b900d2 1465
68542962 1466 bss_conf->assoc = 1;
9cef8737 1467
a97c13c3 1468 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1469 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1470 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1471 bss_info_changed |= BSS_CHANGED_CQM;
1472
68542962 1473 /* Enable ARP filtering */
0f19b41e 1474 if (bss_conf->arp_addr_cnt)
68542962 1475 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1476
ae5eb026 1477 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1478
056508dc
JB		 1479 mutex_lock(&local->iflist_mtx);
1480 ieee80211_recalc_ps(local, -1);
1481 mutex_unlock(&local->iflist_mtx);
e0cb686f 1482
04ecd257 1483 ieee80211_recalc_smps(sdata);
ab095877
EP		 1484 ieee80211_recalc_ps_vif(sdata);
1485
8a5b33f5 1486 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1487 netif_carrier_on(sdata->dev);
f0706e82
JB		 1488}
1489
e69e95db 1490static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1491 u16 stype, u16 reason, bool tx,
1492 u8 *frame_buf)
aa458d17 1493{
46900298 1494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1495 struct ieee80211_local *local = sdata->local;
3cc5240b 1496 u32 changed = 0;
aa458d17 1497
77fdaa12
JB		 1498 ASSERT_MGD_MTX(ifmgd);
1499
37ad3888
JB		 1500 if (WARN_ON_ONCE(tx && !frame_buf))
1501 return;
1502
b291ba11
JB		 1503 if (WARN_ON(!ifmgd->associated))
1504 return;
1505
79543d8e
DS		 1506 ieee80211_stop_poll(sdata);
1507
77fdaa12 1508 ifmgd->associated = NULL;
77fdaa12
JB		 1509
1510 /*
1511 * we need to commit the associated = NULL change because the
1512 * scan code uses that to determine whether this iface should
1513 * go to/wake up from powersave or not -- and could otherwise
1514 * wake the queues erroneously.
1515 */
1516 smp_mb();
1517
1518 /*
1519 * Thus, we can only afterwards stop the queues -- to account
1520 * for the case where another CPU is finishing a scan at this
1521 * time -- we don't want the scan code to enable queues.
1522 */
aa458d17 1523
8a5b33f5 1524 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1525 netif_carrier_off(sdata->dev);
1526
88bc40e8
EP		 1527 /*
1528 * if we want to get out of ps before disassoc (why?) we have
1529 * to do it before sending disassoc, as otherwise the null-packet
1530 * won't be valid.
1531 */
1532 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1533 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1534 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1535 }
1536 local->ps_sdata = NULL;
1537
ab095877
EP		 1538 /* disable per-vif ps */
1539 ieee80211_recalc_ps_vif(sdata);
1540
f823981e
EP		 1541 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1542 if (tx)
1543 drv_flush(local, false);
1544
37ad3888
JB		 1545 /* deauthenticate/disassociate now */
1546 if (tx || frame_buf)
88a9e31c
EP		 1547 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1548 reason, tx, frame_buf);
37ad3888
JB		 1549
1550 /* flush out frame */
1551 if (tx)
1552 drv_flush(local, false);
1553
88a9e31c
EP		 1554 /* clear bssid only after building the needed mgmt frames */
1555 memset(ifmgd->bssid, 0, ETH_ALEN);
1556
37ad3888 1557 /* remove AP and TDLS peers */
051007d9 1558 sta_info_flush_defer(sdata);
37ad3888
JB		 1559
1560 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1561 changed |= ieee80211_reset_erp_info(sdata);
1562
f5e5bf25 1563 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1564 changed |= BSS_CHANGED_ASSOC;
1565 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1566
488dd7b5
JB		 1567 sdata->vif.bss_conf.p2p_ctwindow = 0;
1568 sdata->vif.bss_conf.p2p_oppps = false;
1569
413ad50a 1570 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1571 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1572 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1573
1ea6f9c0 1574 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1575
520eb820
KV		 1576 del_timer_sync(&local->dynamic_ps_timer);
1577 cancel_work_sync(&local->dynamic_ps_enable_work);
1578
68542962 1579 /* Disable ARP filtering */
0f19b41e 1580 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1581 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1582
3abead59
JB		 1583 sdata->vif.bss_conf.qos = false;
1584 changed |= BSS_CHANGED_QOS;
1585
0aaffa9b
JB		 1586 /* The BSSID (not really interesting) and HT changed */
1587 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1588 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1589
3abead59
JB		 1590 /* disassociated - set to defaults now */
1591 ieee80211_set_wmm_default(sdata, false);
1592
b9dcf712
JB		 1593 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1594 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1595 del_timer_sync(&sdata->u.mgd.timer);
1596 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1597
1598 sdata->u.mgd.timers_running = 0;
028e8da0 1599
826262c3
JB		 1600 sdata->vif.bss_conf.dtim_period = 0;
1601
028e8da0
JB		 1602 ifmgd->flags = 0;
1603 ieee80211_vif_release_channel(sdata);
aa458d17 1604}
f0706e82 1605
3cf335d5
KV		 1606void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1607 struct ieee80211_hdr *hdr)
1608{
1609 /*
1610 * We can postpone the mgd.timer whenever receiving unicast frames
1611 * from AP because we know that the connection is working both ways
1612 * at that time. But multicast frames (and hence also beacons) must
1613 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1614 * data idle periods for sending the periodic probe request to the
1615 * AP we're connected to.
3cf335d5 1616 */
b291ba11
JB		 1617 if (is_multicast_ether_addr(hdr->addr1))
1618 return;
1619
be099e82 1620 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1621}
f0706e82 1622
4e5ff376
FF		 1623static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1624{
1625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1626 struct ieee80211_local *local = sdata->local;
4e5ff376 1627
133d40f9 1628 mutex_lock(&local->mtx);
4e5ff376 1629 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1630 IEEE80211_STA_CONNECTION_POLL))) {
1631 mutex_unlock(&local->mtx);
1632 return;
1633 }
4e5ff376 1634
925e64c3 1635 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1636
1637 mutex_lock(&local->iflist_mtx);
1638 ieee80211_recalc_ps(local, -1);
1639 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1640
1641 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1642 goto out;
4e5ff376
FF		 1643
1644 /*
1645 * We've received a probe response, but are not sure whether
1646 * we have or will be receiving any beacons or data, so let's
1647 * schedule the timers again, just in case.
1648 */
1649 ieee80211_sta_reset_beacon_monitor(sdata);
1650
1651 mod_timer(&ifmgd->conn_mon_timer,
1652 round_jiffies_up(jiffies +
1653 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1654out:
133d40f9 1655 mutex_unlock(&local->mtx);
4e5ff376
FF		 1656}
1657
1658void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1659 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1660{
75706d0e 1661 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1662 return;
1663
04ac3c0e
FF		 1664 if (ack)
1665 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1666
1667 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1668 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1669 if (ack)
1670 sdata->u.mgd.probe_send_count = 0;
1671 else
1672 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1673 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1674 }
1675}
1676
a43abf29
ML		 1677static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1678{
1679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1680 const u8 *ssid;
f01a067d 1681 u8 *dst = ifmgd->associated->bssid;
180205bd 1682 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1683
1684 /*
1685 * Try sending broadcast probe requests for the last three
1686 * probe requests after the first ones failed since some
1687 * buggy APs only support broadcast probe requests.
1688 */
1689 if (ifmgd->probe_send_count >= unicast_limit)
1690 dst = NULL;
a43abf29 1691
4e5ff376
FF		 1692 /*
1693 * When the hardware reports an accurate Tx ACK status, it's
1694 * better to send a nullfunc frame instead of a probe request,
1695 * as it will kick us off the AP quickly if we aren't associated
1696 * anymore. The timeout will be reset if the frame is ACKed by
1697 * the AP.
1698 */
992e68bf
SD		 1699 ifmgd->probe_send_count++;
1700
04ac3c0e
FF		 1701 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1702 ifmgd->nullfunc_failed = false;
4e5ff376 1703 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1704 } else {
88c868c4
SG		 1705 int ssid_len;
1706
9caf0364 1707 rcu_read_lock();
4e5ff376 1708 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1709 if (WARN_ON_ONCE(ssid == NULL))
1710 ssid_len = 0;
1711 else
1712 ssid_len = ssid[1];
1713
1714 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1715 0, (u32) -1, true, 0,
55de908a 1716 ifmgd->associated->channel, false);
9caf0364 1717 rcu_read_unlock();
4e5ff376 1718 }
a43abf29 1719
180205bd 1720 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1721 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1722 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1723 drv_flush(sdata->local, false);
a43abf29
ML		 1724}
1725
b291ba11
JB		 1726static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1727 bool beacon)
04de8381 1728{
04de8381 1729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1730 bool already = false;
34bfc411 1731
9607e6b6 1732 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1733 return;
1734
77fdaa12
JB		 1735 mutex_lock(&ifmgd->mtx);
1736
1737 if (!ifmgd->associated)
1738 goto out;
1739
133d40f9
SG		 1740 mutex_lock(&sdata->local->mtx);
1741
1742 if (sdata->local->tmp_channel || sdata->local->scanning) {
1743 mutex_unlock(&sdata->local->mtx);
1744 goto out;
1745 }
1746
e87cc472 1747 if (beacon)
bdcbd8e0
JB		 1748 mlme_dbg_ratelimited(sdata,
1749 "detected beacon loss from AP - sending probe request\n");
1750
6efb71b0
HS		 1751 ieee80211_cqm_rssi_notify(&sdata->vif,
1752 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1753
b291ba11
JB		 1754 /*
1755 * The driver/our work has already reported this event or the
1756 * connection monitoring has kicked in and we have already sent
1757 * a probe request. Or maybe the AP died and the driver keeps
1758 * reporting until we disassociate...
1759 *
1760 * In either case we have to ignore the current call to this
1761 * function (except for setting the correct probe reason bit)
1762 * because otherwise we would reset the timer every time and
1763 * never check whether we received a probe response!
1764 */
1765 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1766 IEEE80211_STA_CONNECTION_POLL))
1767 already = true;
1768
1769 if (beacon)
1770 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1771 else
1772 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1773
133d40f9
SG		 1774 mutex_unlock(&sdata->local->mtx);
1775
b291ba11
JB		 1776 if (already)
1777 goto out;
1778
4e751843
JB		 1779 mutex_lock(&sdata->local->iflist_mtx);
1780 ieee80211_recalc_ps(sdata->local, -1);
1781 mutex_unlock(&sdata->local->iflist_mtx);
1782
a43abf29
ML		 1783 ifmgd->probe_send_count = 0;
1784 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1785 out:
1786 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1787}
1788
a619a4c0
JO		 1789struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1790 struct ieee80211_vif *vif)
1791{
1792 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1794 struct cfg80211_bss *cbss;
a619a4c0
JO		 1795 struct sk_buff *skb;
1796 const u8 *ssid;
88c868c4 1797 int ssid_len;
a619a4c0
JO		 1798
1799 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1800 return NULL;
1801
1802 ASSERT_MGD_MTX(ifmgd);
1803
d9b3b28b
EP		 1804 if (ifmgd->associated)
1805 cbss = ifmgd->associated;
1806 else if (ifmgd->auth_data)
1807 cbss = ifmgd->auth_data->bss;
1808 else if (ifmgd->assoc_data)
1809 cbss = ifmgd->assoc_data->bss;
1810 else
a619a4c0
JO		 1811 return NULL;
1812
9caf0364 1813 rcu_read_lock();
d9b3b28b 1814 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1815 if (WARN_ON_ONCE(ssid == NULL))
1816 ssid_len = 0;
1817 else
1818 ssid_len = ssid[1];
1819
d9b3b28b 1820 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1821 (u32) -1, cbss->channel,
6b77863b 1822 ssid + 2, ssid_len,
85a237fe 1823 NULL, 0, true);
9caf0364 1824 rcu_read_unlock();
a619a4c0
JO		 1825
1826 return skb;
1827}
1828EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1829
eef9e54c 1830static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1831{
1832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1833 struct ieee80211_local *local = sdata->local;
6ae16775 1834 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1835
1836 mutex_lock(&ifmgd->mtx);
1837 if (!ifmgd->associated) {
1838 mutex_unlock(&ifmgd->mtx);
1839 return;
1840 }
1841
37ad3888
JB		 1842 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1843 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1844 true, frame_buf);
882a7c69 1845 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1846 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1847
1e4dcd01
JO		 1848 /*
1849 * must be outside lock due to cfg80211,
1850 * but that's not a problem.
1851 */
6ae16775 1852 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1853
1854 mutex_lock(&local->mtx);
1855 ieee80211_recalc_idle(local);
1856 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1857}
1858
cc74c0c7 1859static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1860{
1861 struct ieee80211_sub_if_data *sdata =
1862 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1863 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1865 struct sta_info *sta;
1866
1867 if (ifmgd->associated) {
30fa9047 1868 rcu_read_lock();
a85e1d55
PS		 1869 sta = sta_info_get(sdata, ifmgd->bssid);
1870 if (sta)
1871 sta->beacon_loss_count++;
30fa9047 1872 rcu_read_unlock();
a85e1d55 1873 }
b291ba11 1874
882a7c69
JB		 1875 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1876 sdata_info(sdata, "Connection to AP %pM lost\n",
1877 ifmgd->bssid);
eef9e54c 1878 __ieee80211_disconnect(sdata);
882a7c69 1879 } else {
1e4dcd01 1880 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1881 }
1882}
1883
1884static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1885{
1886 struct ieee80211_sub_if_data *sdata =
1887 container_of(work, struct ieee80211_sub_if_data,
1888 u.mgd.csa_connection_drop_work);
1889
1890 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1891 IEEE80211_QUEUE_STOP_REASON_CSA);
eef9e54c 1892 __ieee80211_disconnect(sdata);
b291ba11
JB		 1893}
1894
04de8381
KV		 1895void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1896{
1897 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1898 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1899
b5878a2d
JB		 1900 trace_api_beacon_loss(sdata);
1901
1e4dcd01
JO		 1902 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1903 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1904}
1905EXPORT_SYMBOL(ieee80211_beacon_loss);
1906
1e4dcd01
JO		 1907void ieee80211_connection_loss(struct ieee80211_vif *vif)
1908{
1909 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1910 struct ieee80211_hw *hw = &sdata->local->hw;
1911
b5878a2d
JB		 1912 trace_api_connection_loss(sdata);
1913
1e4dcd01
JO		 1914 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1915 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1916}
1917EXPORT_SYMBOL(ieee80211_connection_loss);
1918
1919
66e67e41
JB		 1920static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1921 bool assoc)
1922{
1923 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1924
1925 lockdep_assert_held(&sdata->u.mgd.mtx);
1926
66e67e41
JB		 1927 if (!assoc) {
1928 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1929
1930 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1931 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1932 sdata->u.mgd.flags = 0;
55de908a 1933 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1934 }
1935
1936 cfg80211_put_bss(auth_data->bss);
1937 kfree(auth_data);
1938 sdata->u.mgd.auth_data = NULL;
1939}
1940
1941static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1942 struct ieee80211_mgmt *mgmt, size_t len)
1943{
1672c0e3 1944 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 1945 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1946 u8 *pos;
1947 struct ieee802_11_elems elems;
1672c0e3 1948 u32 tx_flags = 0;
66e67e41
JB		 1949
1950 pos = mgmt->u.auth.variable;
1951 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1952 if (!elems.challenge)
1953 return;
1954 auth_data->expected_transaction = 4;
a1845fc7 1955 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 1956 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1957 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1958 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 1959 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1960 elems.challenge - 2, elems.challenge_len + 2,
1961 auth_data->bss->bssid, auth_data->bss->bssid,
1962 auth_data->key, auth_data->key_len,
1672c0e3 1963 auth_data->key_idx, tx_flags);
66e67e41
JB		 1964}
1965
1966static enum rx_mgmt_action __must_check
1967ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1968 struct ieee80211_mgmt *mgmt, size_t len)
1969{
1970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1971 u8 bssid[ETH_ALEN];
1972 u16 auth_alg, auth_transaction, status_code;
1973 struct sta_info *sta;
1974
1975 lockdep_assert_held(&ifmgd->mtx);
1976
1977 if (len < 24 + 6)
1978 return RX_MGMT_NONE;
1979
1980 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1981 return RX_MGMT_NONE;
1982
1983 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1984
b203ca39 1985 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1986 return RX_MGMT_NONE;
1987
1988 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1989 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1990 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1991
1992 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1993 auth_transaction != ifmgd->auth_data->expected_transaction) {
1994 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1995 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1996 auth_transaction,
1997 ifmgd->auth_data->expected_transaction);
66e67e41 1998 return RX_MGMT_NONE;
0f4126e8 1999 }
66e67e41
JB		 2000
2001 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2002 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2003 mgmt->sa, status_code);
dac211ec
EP		 2004 ieee80211_destroy_auth_data(sdata, false);
2005 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2006 }
2007
2008 switch (ifmgd->auth_data->algorithm) {
2009 case WLAN_AUTH_OPEN:
2010 case WLAN_AUTH_LEAP:
2011 case WLAN_AUTH_FT:
6b8ece3a 2012 case WLAN_AUTH_SAE:
66e67e41
JB		 2013 break;
2014 case WLAN_AUTH_SHARED_KEY:
2015 if (ifmgd->auth_data->expected_transaction != 4) {
2016 ieee80211_auth_challenge(sdata, mgmt, len);
2017 /* need another frame */
2018 return RX_MGMT_NONE;
2019 }
2020 break;
2021 default:
2022 WARN_ONCE(1, "invalid auth alg %d",
2023 ifmgd->auth_data->algorithm);
2024 return RX_MGMT_NONE;
2025 }
2026
bdcbd8e0 2027 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2028 ifmgd->auth_data->done = true;
2029 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2030 run_again(ifmgd, ifmgd->auth_data->timeout);
2031
6b8ece3a
JM		 2032 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2033 ifmgd->auth_data->expected_transaction != 2) {
2034 /*
2035 * Report auth frame to user space for processing since another
2036 * round of Authentication frames is still needed.
2037 */
2038 return RX_MGMT_CFG80211_RX_AUTH;
2039 }
2040
66e67e41
JB		 2041 /* move station state to auth */
2042 mutex_lock(&sdata->local->sta_mtx);
2043 sta = sta_info_get(sdata, bssid);
2044 if (!sta) {
2045 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2046 goto out_err;
2047 }
2048 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2049 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2050 goto out_err;
2051 }
2052 mutex_unlock(&sdata->local->sta_mtx);
2053
2054 return RX_MGMT_CFG80211_RX_AUTH;
2055 out_err:
2056 mutex_unlock(&sdata->local->sta_mtx);
2057 /* ignore frame -- wait for timeout */
2058 return RX_MGMT_NONE;
2059}
2060
2061
77fdaa12
JB		 2062static enum rx_mgmt_action __must_check
2063ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2064 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2065{
46900298 2066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2067 const u8 *bssid = NULL;
f0706e82
JB		 2068 u16 reason_code;
2069
66e67e41
JB		 2070 lockdep_assert_held(&ifmgd->mtx);
2071
f4ea83dd 2072 if (len < 24 + 2)
77fdaa12 2073 return RX_MGMT_NONE;
f0706e82 2074
66e67e41 2075 if (!ifmgd->associated ||
b203ca39 2076 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2077 return RX_MGMT_NONE;
77fdaa12 2078
0c1ad2ca 2079 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2080
2081 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2082
bdcbd8e0
JB		 2083 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2084 bssid, reason_code);
77fdaa12 2085
37ad3888
JB		 2086 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2087
7da7cc1d 2088 mutex_lock(&sdata->local->mtx);
63f170e0 2089 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2090 mutex_unlock(&sdata->local->mtx);
f0706e82 2091
77fdaa12 2092 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2093}
2094
2095
77fdaa12
JB		 2096static enum rx_mgmt_action __must_check
2097ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2098 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2099{
46900298 2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2101 u16 reason_code;
2102
66e67e41 2103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2104
66e67e41 2105 if (len < 24 + 2)
77fdaa12
JB		 2106 return RX_MGMT_NONE;
2107
66e67e41 2108 if (!ifmgd->associated ||
b203ca39 2109 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2110 return RX_MGMT_NONE;
f0706e82
JB		 2111
2112 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2113
bdcbd8e0
JB		 2114 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2115 mgmt->sa, reason_code);
f0706e82 2116
37ad3888
JB		 2117 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2118
7da7cc1d 2119 mutex_lock(&sdata->local->mtx);
bc83b681 2120 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2121 mutex_unlock(&sdata->local->mtx);
37ad3888 2122
77fdaa12 2123 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2124}
2125
c74d084f
CL		 2126static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2127 u8 *supp_rates, unsigned int supp_rates_len,
2128 u32 *rates, u32 *basic_rates,
2129 bool *have_higher_than_11mbit,
2130 int *min_rate, int *min_rate_index)
2131{
2132 int i, j;
2133
2134 for (i = 0; i < supp_rates_len; i++) {
2135 int rate = (supp_rates[i] & 0x7f) * 5;
2136 bool is_basic = !!(supp_rates[i] & 0x80);
2137
2138 if (rate > 110)
2139 *have_higher_than_11mbit = true;
2140
2141 /*
2142 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2143 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2144 *
2145 * Note: Even through the membership selector and the basic
2146 * rate flag share the same bit, they are not exactly
2147 * the same.
2148 */
2149 if (!!(supp_rates[i] & 0x80) &&
2150 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2151 continue;
2152
2153 for (j = 0; j < sband->n_bitrates; j++) {
2154 if (sband->bitrates[j].bitrate == rate) {
2155 *rates |= BIT(j);
2156 if (is_basic)
2157 *basic_rates |= BIT(j);
2158 if (rate < *min_rate) {
2159 *min_rate = rate;
2160 *min_rate_index = j;
2161 }
2162 break;
2163 }
2164 }
2165 }
2166}
f0706e82 2167
66e67e41
JB		 2168static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2169 bool assoc)
2170{
2171 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2172
2173 lockdep_assert_held(&sdata->u.mgd.mtx);
2174
66e67e41
JB		 2175 if (!assoc) {
2176 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2177
2178 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2179 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2180 sdata->u.mgd.flags = 0;
55de908a 2181 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2182 }
2183
2184 kfree(assoc_data);
2185 sdata->u.mgd.assoc_data = NULL;
2186}
2187
2188static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2189 struct cfg80211_bss *cbss,
af6b6374 2190 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2191{
46900298 2192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2193 struct ieee80211_local *local = sdata->local;
8318d78a 2194 struct ieee80211_supported_band *sband;
f0706e82 2195 struct sta_info *sta;
af6b6374 2196 u8 *pos;
af6b6374 2197 u16 capab_info, aid;
f0706e82 2198 struct ieee802_11_elems elems;
bda3933a 2199 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2200 u32 changed = 0;
c74d084f 2201 int err;
f0706e82 2202
af6b6374 2203 /* AssocResp and ReassocResp have identical structure */
f0706e82 2204
f0706e82 2205 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2206 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2207
1dd84aa2 2208 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2209 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2210 aid);
1dd84aa2
JB		 2211 aid &= ~(BIT(15) | BIT(14));
2212
05cb9108
JB		 2213 ifmgd->broken_ap = false;
2214
2215 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2216 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2217 aid);
05cb9108
JB		 2218 aid = 0;
2219 ifmgd->broken_ap = true;
2220 }
2221
af6b6374
JB		 2222 pos = mgmt->u.assoc_resp.variable;
2223 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2224
f0706e82 2225 if (!elems.supp_rates) {
bdcbd8e0 2226 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2227 return false;
f0706e82
JB		 2228 }
2229
46900298 2230 ifmgd->aid = aid;
f0706e82 2231
2a33bee2
GE		 2232 mutex_lock(&sdata->local->sta_mtx);
2233 /*
2234 * station info was already allocated and inserted before
2235 * the association and should be available to us
2236 */
7852e361 2237 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2238 if (WARN_ON(!sta)) {
2239 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2240 return false;
77fdaa12 2241 }
05e5e883 2242
55de908a 2243 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2244
a8243b72 2245 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2246 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2247 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2248
64f68e5d
JB		 2249 sta->supports_40mhz =
2250 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2251
818255ea
MP		 2252 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2253 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2254 elems.vht_cap_elem,
2255 &sta->sta.vht_cap);
2256
4b7679a5 2257 rate_control_rate_init(sta);
f0706e82 2258
46900298 2259 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2260 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2261
ddf4ac53 2262 if (elems.wmm_param)
c2c98fde 2263 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2264
c8987876
JB		 2265 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2266 if (!err)
2267 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2268 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2269 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2270 if (err) {
bdcbd8e0
JB		 2271 sdata_info(sdata,
2272 "failed to move station %pM to desired state\n",
2273 sta->sta.addr);
c8987876
JB		 2274 WARN_ON(__sta_info_destroy(sta));
2275 mutex_unlock(&sdata->local->sta_mtx);
2276 return false;
2277 }
2278
7852e361 2279 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2280
f2176d72
JO		 2281 /*
2282 * Always handle WMM once after association regardless
2283 * of the first value the AP uses. Setting -1 here has
2284 * that effect because the AP values is an unsigned
2285 * 4-bit value.
2286 */
2287 ifmgd->wmm_last_param_set = -1;
2288
ddf4ac53 2289 if (elems.wmm_param)
4ced3f74 2290 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2291 elems.wmm_param_len);
aa837e1d 2292 else
3abead59
JB		 2293 ieee80211_set_wmm_default(sdata, false);
2294 changed |= BSS_CHANGED_QOS;
f0706e82 2295
074d46d1 2296 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2297 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2298 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2299 cbss->bssid, false);
ae5eb026 2300
60f8b39c
JB		 2301 /* set AID and assoc capability,
2302 * ieee80211_set_associated() will tell the driver */
2303 bss_conf->aid = aid;
2304 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2305 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2306
d524215f
FF		 2307 /*
2308 * If we're using 4-addr mode, let the AP know that we're
2309 * doing so, so that it can create the STA VLAN on its side
2310 */
2311 if (ifmgd->use_4addr)
2312 ieee80211_send_4addr_nullfunc(local, sdata);
2313
15b7b062 2314 /*
b291ba11
JB		 2315 * Start timer to probe the connection to the AP now.
2316 * Also start the timer that will detect beacon loss.
15b7b062 2317 */
b291ba11 2318 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2319 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2320
af6b6374 2321 return true;
f0706e82
JB		 2322}
2323
66e67e41
JB		 2324static enum rx_mgmt_action __must_check
2325ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2326 struct ieee80211_mgmt *mgmt, size_t len,
2327 struct cfg80211_bss **bss)
2328{
2329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2330 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2331 u16 capab_info, status_code, aid;
2332 struct ieee802_11_elems elems;
2333 u8 *pos;
2334 bool reassoc;
2335
2336 lockdep_assert_held(&ifmgd->mtx);
2337
2338 if (!assoc_data)
2339 return RX_MGMT_NONE;
b203ca39 2340 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2341 return RX_MGMT_NONE;
2342
2343 /*
2344 * AssocResp and ReassocResp have identical structure, so process both
2345 * of them in this function.
2346 */
2347
2348 if (len < 24 + 6)
2349 return RX_MGMT_NONE;
2350
2351 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2352 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2353 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2354 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2355
bdcbd8e0
JB		 2356 sdata_info(sdata,
2357 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2358 reassoc ? "Rea" : "A", mgmt->sa,
2359 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2360
2361 pos = mgmt->u.assoc_resp.variable;
2362 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2363
2364 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2365 elems.timeout_int && elems.timeout_int_len == 5 &&
2366 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2367 u32 tu, ms;
2368 tu = get_unaligned_le32(elems.timeout_int + 1);
2369 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2370 sdata_info(sdata,
2371 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2372 mgmt->sa, tu, ms);
66e67e41
JB		 2373 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2374 if (ms > IEEE80211_ASSOC_TIMEOUT)
2375 run_again(ifmgd, assoc_data->timeout);
2376 return RX_MGMT_NONE;
2377 }
2378
2379 *bss = assoc_data->bss;
2380
2381 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2382 sdata_info(sdata, "%pM denied association (code=%d)\n",
2383 mgmt->sa, status_code);
66e67e41
JB		 2384 ieee80211_destroy_assoc_data(sdata, false);
2385 } else {
66e67e41
JB		 2386 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2387 /* oops -- internal error -- send timeout for now */
10a9109f 2388 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2389 cfg80211_put_bss(*bss);
2390 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2391 }
635d999f 2392 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2393
2394 /*
2395 * destroy assoc_data afterwards, as otherwise an idle
2396 * recalc after assoc_data is NULL but before associated
2397 * is set can cause the interface to go idle
2398 */
2399 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2400 }
2401
2402 return RX_MGMT_CFG80211_RX_ASSOC;
2403}
8e3c1b77 2404
98c8fccf 2405static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2406 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2407 struct ieee80211_rx_status *rx_status,
d45c4172 2408 struct ieee802_11_elems *elems)
98c8fccf
JB		 2409{
2410 struct ieee80211_local *local = sdata->local;
2411 int freq;
c2b13452 2412 struct ieee80211_bss *bss;
98c8fccf 2413 struct ieee80211_channel *channel;
56007a02
JB		 2414 bool need_ps = false;
2415
826262c3
JB		 2416 if ((sdata->u.mgd.associated &&
2417 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2418 (sdata->u.mgd.assoc_data &&
2419 ether_addr_equal(mgmt->bssid,
2420 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2421 /* not previously set so we may need to recalc */
826262c3
JB		 2422 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2423
2424 if (elems->tim && !elems->parse_error) {
2425 struct ieee80211_tim_ie *tim_ie = elems->tim;
2426 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2427 }
56007a02 2428 }
98c8fccf
JB		 2429
2430 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2431 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2432 rx_status->band);
98c8fccf
JB		 2433 else
2434 freq = rx_status->freq;
2435
2436 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2437
2438 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2439 return;
2440
98c8fccf 2441 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2442 channel);
77fdaa12
JB		 2443 if (bss)
2444 ieee80211_rx_bss_put(local, bss);
2445
2446 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2447 return;
2448
56007a02
JB		 2449 if (need_ps) {
2450 mutex_lock(&local->iflist_mtx);
2451 ieee80211_recalc_ps(local, -1);
2452 mutex_unlock(&local->iflist_mtx);
2453 }
2454
5bc1420b
JB		 2455 if (elems->ch_switch_ie &&
2456 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2457 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2458 bss, rx_status->mactime);
f0706e82
JB		 2459}
2460
2461
f698d856 2462static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2463 struct sk_buff *skb)
f0706e82 2464{
af6b6374 2465 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2466 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2467 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2468 size_t baselen, len = skb->len;
ae6a44e3
EK		 2469 struct ieee802_11_elems elems;
2470
15b7b062
KV		 2471 ifmgd = &sdata->u.mgd;
2472
77fdaa12
JB		 2473 ASSERT_MGD_MTX(ifmgd);
2474
b203ca39 2475 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2476 return; /* ignore ProbeResp to foreign address */
2477
ae6a44e3
EK		 2478 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2479 if (baselen > len)
2480 return;
2481
2482 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2483 &elems);
2484
d45c4172 2485 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2486
77fdaa12 2487 if (ifmgd->associated &&
b203ca39 2488 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2489 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2490
2491 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2492 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2493 /* got probe response, continue with auth */
bdcbd8e0 2494 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2495 ifmgd->auth_data->tries = 0;
2496 ifmgd->auth_data->timeout = jiffies;
2497 run_again(ifmgd, ifmgd->auth_data->timeout);
2498 }
f0706e82
JB		 2499}
2500
d91f36db
JB		 2501/*
2502 * This is the canonical list of information elements we care about,
2503 * the filter code also gives us all changes to the Microsoft OUI
2504 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2505 *
2506 * We implement beacon filtering in software since that means we can
2507 * avoid processing the frame here and in cfg80211, and userspace
2508 * will not be able to tell whether the hardware supports it or not.
2509 *
2510 * XXX: This list needs to be dynamic -- userspace needs to be able to
2511 * add items it requires. It also needs to be able to tell us to
2512 * look out for other vendor IEs.
2513 */
2514static const u64 care_about_ies =
1d4df3a5
JB		 2515 (1ULL << WLAN_EID_COUNTRY) |
2516 (1ULL << WLAN_EID_ERP_INFO) |
2517 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2518 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2519 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2520 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2521
f698d856 2522static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2523 struct ieee80211_mgmt *mgmt,
2524 size_t len,
2525 struct ieee80211_rx_status *rx_status)
2526{
d91f36db 2527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2528 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2529 size_t baselen;
2530 struct ieee802_11_elems elems;
f698d856 2531 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2532 struct ieee80211_chanctx_conf *chanctx_conf;
2533 struct ieee80211_channel *chan;
471b3efd 2534 u32 changed = 0;
f87ad637 2535 bool erp_valid;
7a5158ef 2536 u8 erp_value = 0;
d91f36db 2537 u32 ncrc;
77fdaa12
JB		 2538 u8 *bssid;
2539
66e67e41 2540 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2541
ae6a44e3
EK		 2542 /* Process beacon from the current BSS */
2543 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2544 if (baselen > len)
2545 return;
2546
55de908a
JB		 2547 rcu_read_lock();
2548 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2549 if (!chanctx_conf) {
2550 rcu_read_unlock();
f0706e82 2551 return;
55de908a
JB		 2552 }
2553
4bf88530 2554 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2555 rcu_read_unlock();
2556 return;
2557 }
4bf88530 2558 chan = chanctx_conf->def.chan;
55de908a 2559 rcu_read_unlock();
f0706e82 2560
c65dd147 2561 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2562 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2563 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2564 len - baselen, &elems);
77fdaa12 2565
d45c4172 2566 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2567 ifmgd->assoc_data->have_beacon = true;
c65dd147 2568 ifmgd->assoc_data->need_beacon = false;
66e67e41
JB		 2569 /* continue assoc process */
2570 ifmgd->assoc_data->timeout = jiffies;
2571 run_again(ifmgd, ifmgd->assoc_data->timeout);
2572 return;
2573 }
77fdaa12 2574
66e67e41 2575 if (!ifmgd->associated ||
b203ca39 2576 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2577 return;
66e67e41 2578 bssid = ifmgd->associated->bssid;
f0706e82 2579
17e4ec14
JM		 2580 /* Track average RSSI from the Beacon frames of the current AP */
2581 ifmgd->last_beacon_signal = rx_status->signal;
2582 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2583 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2584 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2585 ifmgd->last_cqm_event_signal = 0;
391a200a 2586 ifmgd->count_beacon_signal = 1;
615f7b9b 2587 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2588 } else {
2589 ifmgd->ave_beacon_signal =
2590 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2591 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2592 ifmgd->ave_beacon_signal) / 16;
391a200a 2593 ifmgd->count_beacon_signal++;
17e4ec14 2594 }
615f7b9b
MV		 2595
2596 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2597 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2598 int sig = ifmgd->ave_beacon_signal;
2599 int last_sig = ifmgd->last_ave_beacon_signal;
2600
2601 /*
2602 * if signal crosses either of the boundaries, invoke callback
2603 * with appropriate parameters
2604 */
2605 if (sig > ifmgd->rssi_max_thold &&
2606 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2607 ifmgd->last_ave_beacon_signal = sig;
887da917 2608 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2609 } else if (sig < ifmgd->rssi_min_thold &&
2610 (last_sig >= ifmgd->rssi_max_thold ||
2611 last_sig == 0)) {
2612 ifmgd->last_ave_beacon_signal = sig;
887da917 2613 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2614 }
2615 }
2616
17e4ec14 2617 if (bss_conf->cqm_rssi_thold &&
391a200a 2618 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2619 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2620 int sig = ifmgd->ave_beacon_signal / 16;
2621 int last_event = ifmgd->last_cqm_event_signal;
2622 int thold = bss_conf->cqm_rssi_thold;
2623 int hyst = bss_conf->cqm_rssi_hyst;
2624 if (sig < thold &&
2625 (last_event == 0 || sig < last_event - hyst)) {
2626 ifmgd->last_cqm_event_signal = sig;
2627 ieee80211_cqm_rssi_notify(
2628 &sdata->vif,
2629 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2630 GFP_KERNEL);
2631 } else if (sig > thold &&
2632 (last_event == 0 || sig > last_event + hyst)) {
2633 ifmgd->last_cqm_event_signal = sig;
2634 ieee80211_cqm_rssi_notify(
2635 &sdata->vif,
2636 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2637 GFP_KERNEL);
2638 }
2639 }
2640
b291ba11 2641 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2642 mlme_dbg_ratelimited(sdata,
2643 "cancelling probereq poll due to a received beacon\n");
925e64c3 2644 mutex_lock(&local->mtx);
b291ba11 2645 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2646 ieee80211_run_deferred_scan(local);
2647 mutex_unlock(&local->mtx);
2648
4e751843
JB		 2649 mutex_lock(&local->iflist_mtx);
2650 ieee80211_recalc_ps(local, -1);
2651 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2652 }
2653
b291ba11
JB		 2654 /*
2655 * Push the beacon loss detection into the future since
2656 * we are processing a beacon from the AP just now.
2657 */
d3a910a8 2658 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2659
d91f36db
JB		 2660 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2661 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2662 len - baselen, &elems,
2663 care_about_ies, ncrc);
2664
25c9c875 2665 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2666 bool directed_tim = ieee80211_check_tim(elems.tim,
2667 elems.tim_len,
2668 ifmgd->aid);
1fb3606b 2669 if (directed_tim) {
572e0012 2670 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2671 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2672 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2673 ieee80211_hw_config(local,
2674 IEEE80211_CONF_CHANGE_PS);
2675 }
572e0012 2676 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2677 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2678 local->pspolling = true;
2679
2680 /*
2681 * Here is assumed that the driver will be
2682 * able to send ps-poll frame and receive a
2683 * response even though power save mode is
2684 * enabled, but some drivers might require
2685 * to disable power save here. This needs
2686 * to be investigated.
2687 */
2688 ieee80211_send_pspoll(local, sdata);
2689 }
a97b77b9
VN		 2690 }
2691 }
7a5158ef 2692
488dd7b5
JB		 2693 if (sdata->vif.p2p) {
2694 u8 noa[2];
2695 int ret;
2696
2697 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2698 len - baselen,
2699 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2700 noa, sizeof(noa));
2701 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2702 bss_conf->p2p_oppps = noa[1] & 0x80;
2703 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2704 changed |= BSS_CHANGED_P2P_PS;
2705 sdata->u.mgd.p2p_noa_index = noa[0];
2706 /*
2707 * make sure we update all information, the CRC
2708 * mechanism doesn't look at P2P attributes.
2709 */
2710 ifmgd->beacon_crc_valid = false;
2711 }
2712 }
2713
d8ec4433 2714 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2715 return;
2716 ifmgd->beacon_crc = ncrc;
d8ec4433 2717 ifmgd->beacon_crc_valid = true;
30196673 2718
d45c4172 2719 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2720
2721 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2722 elems.wmm_param_len))
2723 changed |= BSS_CHANGED_QOS;
2724
c65dd147
EG		 2725 /*
2726 * If we haven't had a beacon before, tell the driver about the
2727 * DTIM period now.
2728 */
2729 if (!bss_conf->dtim_period) {
2730 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2731 if (elems.tim)
2732 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2733 else
2734 bss_conf->dtim_period = 1;
2735 changed |= BSS_CHANGED_DTIM_PERIOD;
2736 }
2737
7a5158ef
JB		 2738 if (elems.erp_info && elems.erp_info_len >= 1) {
2739 erp_valid = true;
2740 erp_value = elems.erp_info[0];
2741 } else {
2742 erp_valid = false;
50c4afb9 2743 }
7a5158ef
JB		 2744 changed |= ieee80211_handle_bss_capability(sdata,
2745 le16_to_cpu(mgmt->u.beacon.capab_info),
2746 erp_valid, erp_value);
f0706e82 2747
d3c990fb 2748
074d46d1 2749 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2750 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2751 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2752 bssid, true);
d3c990fb 2753
04b7b2ff
JB		 2754 if (elems.country_elem && elems.pwr_constr_elem &&
2755 mgmt->u.probe_resp.capab_info &
2756 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2757 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2758 elems.country_elem,
2759 elems.country_elem_len,
2760 elems.pwr_constr_elem);
3f2355cb 2761
471b3efd 2762 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2763}
2764
1fa57d01
JB		 2765void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2766 struct sk_buff *skb)
f0706e82 2767{
77fdaa12 2768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2769 struct ieee80211_rx_status *rx_status;
f0706e82 2770 struct ieee80211_mgmt *mgmt;
66e67e41 2771 struct cfg80211_bss *bss = NULL;
77fdaa12 2772 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2773 u16 fc;
2774
f0706e82
JB		 2775 rx_status = (struct ieee80211_rx_status *) skb->cb;
2776 mgmt = (struct ieee80211_mgmt *) skb->data;
2777 fc = le16_to_cpu(mgmt->frame_control);
2778
77fdaa12
JB		 2779 mutex_lock(&ifmgd->mtx);
2780
66e67e41
JB		 2781 switch (fc & IEEE80211_FCTL_STYPE) {
2782 case IEEE80211_STYPE_BEACON:
2783 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2784 break;
2785 case IEEE80211_STYPE_PROBE_RESP:
2786 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2787 break;
2788 case IEEE80211_STYPE_AUTH:
2789 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2790 break;
2791 case IEEE80211_STYPE_DEAUTH:
2792 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2793 break;
2794 case IEEE80211_STYPE_DISASSOC:
2795 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2796 break;
2797 case IEEE80211_STYPE_ASSOC_RESP:
2798 case IEEE80211_STYPE_REASSOC_RESP:
2799 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2800 break;
2801 case IEEE80211_STYPE_ACTION:
2802 switch (mgmt->u.action.category) {
2803 case WLAN_CATEGORY_SPECTRUM_MGMT:
2804 ieee80211_sta_process_chanswitch(sdata,
2805 &mgmt->u.action.u.chan_switch.sw_elem,
2806 (void *)ifmgd->associated->priv,
2807 rx_status->mactime);
77fdaa12 2808 break;
77fdaa12 2809 }
77fdaa12 2810 }
77fdaa12
JB		 2811 mutex_unlock(&ifmgd->mtx);
2812
66e67e41
JB		 2813 switch (rma) {
2814 case RX_MGMT_NONE:
2815 /* no action */
2816 break;
2817 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2818 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2819 break;
2820 case RX_MGMT_CFG80211_DISASSOC:
2821 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2822 break;
2823 case RX_MGMT_CFG80211_RX_AUTH:
2824 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2825 break;
2826 case RX_MGMT_CFG80211_RX_ASSOC:
2827 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2828 break;
2829 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2830 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2831 break;
2832 default:
2833 WARN(1, "unexpected: %d", rma);
b054b747 2834 }
f0706e82
JB		 2835}
2836
9c6bd790 2837static void ieee80211_sta_timer(unsigned long data)
f0706e82 2838{
60f8b39c
JB		 2839 struct ieee80211_sub_if_data *sdata =
2840 (struct ieee80211_sub_if_data *) data;
46900298 2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2842 struct ieee80211_local *local = sdata->local;
f0706e82 2843
5bb644a0
JB		 2844 if (local->quiescing) {
2845 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2846 return;
2847 }
2848
64592c8f 2849 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2850}
2851
04ac3c0e 2852static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2853 u8 *bssid, u8 reason)
04ac3c0e
FF		 2854{
2855 struct ieee80211_local *local = sdata->local;
2856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2857 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2858
37ad3888
JB		 2859 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2860 false, frame_buf);
04ac3c0e 2861 mutex_unlock(&ifmgd->mtx);
37ad3888 2862
04ac3c0e
FF		 2863 /*
2864 * must be outside lock due to cfg80211,
2865 * but that's not a problem.
2866 */
6ae16775 2867 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2868
2869 mutex_lock(&local->mtx);
2870 ieee80211_recalc_idle(local);
2871 mutex_unlock(&local->mtx);
2872
04ac3c0e
FF		 2873 mutex_lock(&ifmgd->mtx);
2874}
2875
66e67e41
JB		 2876static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2877{
2878 struct ieee80211_local *local = sdata->local;
2879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2880 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 2881 u32 tx_flags = 0;
66e67e41
JB		 2882
2883 lockdep_assert_held(&ifmgd->mtx);
2884
2885 if (WARN_ON_ONCE(!auth_data))
2886 return -EINVAL;
2887
1672c0e3
JB		 2888 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2889 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2890 IEEE80211_TX_INTFL_MLME_CONN_TX;
2891
66e67e41
JB		 2892 auth_data->tries++;
2893
2894 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2895 sdata_info(sdata, "authentication with %pM timed out\n",
2896 auth_data->bss->bssid);
66e67e41
JB		 2897
2898 /*
2899 * Most likely AP is not in the range so remove the
2900 * bss struct for that AP.
2901 */
2902 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2903
2904 return -ETIMEDOUT;
2905 }
2906
a1845fc7
JB		 2907 drv_mgd_prepare_tx(local, sdata);
2908
66e67e41 2909 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2910 u16 trans = 1;
2911 u16 status = 0;
2912
bdcbd8e0
JB		 2913 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2914 auth_data->bss->bssid, auth_data->tries,
2915 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2916
2917 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2918
2919 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2920 trans = auth_data->sae_trans;
2921 status = auth_data->sae_status;
2922 auth_data->expected_transaction = trans;
2923 }
2924
2925 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2926 auth_data->data, auth_data->data_len,
66e67e41 2927 auth_data->bss->bssid,
1672c0e3
JB		 2928 auth_data->bss->bssid, NULL, 0, 0,
2929 tx_flags);
66e67e41
JB		 2930 } else {
2931 const u8 *ssidie;
2932
bdcbd8e0
JB		 2933 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2934 auth_data->bss->bssid, auth_data->tries,
2935 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2936
9caf0364 2937 rcu_read_lock();
66e67e41 2938 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2939 if (!ssidie) {
2940 rcu_read_unlock();
66e67e41 2941 return -EINVAL;
9caf0364 2942 }
66e67e41
JB		 2943 /*
2944 * Direct probe is sent to broadcast address as some APs
2945 * will not answer to direct packet in unassociated state.
2946 */
2947 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 2948 NULL, 0, (u32) -1, true, tx_flags,
55de908a 2949 auth_data->bss->channel, false);
9caf0364 2950 rcu_read_unlock();
66e67e41
JB		 2951 }
2952
1672c0e3
JB		 2953 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2954 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2955 run_again(ifmgd, auth_data->timeout);
2956 }
66e67e41
JB		 2957
2958 return 0;
2959}
2960
2961static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2962{
2963 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2964 struct ieee80211_local *local = sdata->local;
2965
2966 lockdep_assert_held(&sdata->u.mgd.mtx);
2967
66e67e41
JB		 2968 assoc_data->tries++;
2969 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2970 sdata_info(sdata, "association with %pM timed out\n",
2971 assoc_data->bss->bssid);
66e67e41
JB		 2972
2973 /*
2974 * Most likely AP is not in the range so remove the
2975 * bss struct for that AP.
2976 */
2977 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2978
2979 return -ETIMEDOUT;
2980 }
2981
bdcbd8e0
JB		 2982 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2983 assoc_data->bss->bssid, assoc_data->tries,
2984 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2985 ieee80211_send_assoc(sdata);
2986
1672c0e3
JB		 2987 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2988 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2989 run_again(&sdata->u.mgd, assoc_data->timeout);
2990 }
66e67e41
JB		 2991
2992 return 0;
2993}
2994
1672c0e3
JB		 2995void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2996 __le16 fc, bool acked)
2997{
2998 struct ieee80211_local *local = sdata->local;
2999
3000 sdata->u.mgd.status_fc = fc;
3001 sdata->u.mgd.status_acked = acked;
3002 sdata->u.mgd.status_received = true;
3003
3004 ieee80211_queue_work(&local->hw, &sdata->work);
3005}
3006
1fa57d01 3007void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3008{
9c6bd790 3009 struct ieee80211_local *local = sdata->local;
1fa57d01 3010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3011
77fdaa12
JB		 3012 mutex_lock(&ifmgd->mtx);
3013
1672c0e3
JB		 3014 if (ifmgd->status_received) {
3015 __le16 fc = ifmgd->status_fc;
3016 bool status_acked = ifmgd->status_acked;
3017
3018 ifmgd->status_received = false;
3019 if (ifmgd->auth_data &&
3020 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3021 if (status_acked) {
3022 ifmgd->auth_data->timeout =
3023 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3024 run_again(ifmgd, ifmgd->auth_data->timeout);
3025 } else {
3026 ifmgd->auth_data->timeout = jiffies - 1;
3027 }
3028 } else if (ifmgd->assoc_data &&
3029 (ieee80211_is_assoc_req(fc) ||
3030 ieee80211_is_reassoc_req(fc))) {
3031 if (status_acked) {
3032 ifmgd->assoc_data->timeout =
3033 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3034 run_again(ifmgd, ifmgd->assoc_data->timeout);
3035 } else {
3036 ifmgd->assoc_data->timeout = jiffies - 1;
3037 }
3038 }
3039 }
3040
66e67e41
JB		 3041 if (ifmgd->auth_data &&
3042 time_after(jiffies, ifmgd->auth_data->timeout)) {
3043 if (ifmgd->auth_data->done) {
3044 /*
3045 * ok ... we waited for assoc but userspace didn't,
3046 * so let's just kill the auth data
3047 */
3048 ieee80211_destroy_auth_data(sdata, false);
3049 } else if (ieee80211_probe_auth(sdata)) {
3050 u8 bssid[ETH_ALEN];
3051
3052 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3053
3054 ieee80211_destroy_auth_data(sdata, false);
3055
3056 mutex_unlock(&ifmgd->mtx);
3057 cfg80211_send_auth_timeout(sdata->dev, bssid);
3058 mutex_lock(&ifmgd->mtx);
3059 }
3060 } else if (ifmgd->auth_data)
3061 run_again(ifmgd, ifmgd->auth_data->timeout);
3062
3063 if (ifmgd->assoc_data &&
3064 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3065 if ((ifmgd->assoc_data->need_beacon &&
3066 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3067 ieee80211_do_assoc(sdata)) {
3068 u8 bssid[ETH_ALEN];
3069
3070 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3071
3072 ieee80211_destroy_assoc_data(sdata, false);
3073
3074 mutex_unlock(&ifmgd->mtx);
3075 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3076 mutex_lock(&ifmgd->mtx);
3077 }
3078 } else if (ifmgd->assoc_data)
3079 run_again(ifmgd, ifmgd->assoc_data->timeout);
3080
b291ba11
JB		 3081 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3082 IEEE80211_STA_CONNECTION_POLL) &&
3083 ifmgd->associated) {
a43abf29 3084 u8 bssid[ETH_ALEN];
72a8a3ed 3085 int max_tries;
a43abf29 3086
0c1ad2ca 3087 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3088
72a8a3ed 3089 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3090 max_tries = max_nullfunc_tries;
72a8a3ed 3091 else
180205bd 3092 max_tries = max_probe_tries;
72a8a3ed 3093
4e5ff376
FF		 3094 /* ACK received for nullfunc probing frame */
3095 if (!ifmgd->probe_send_count)
3096 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3097 else if (ifmgd->nullfunc_failed) {
3098 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3099 mlme_dbg(sdata,
3100 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3101 bssid, ifmgd->probe_send_count,
3102 max_tries);
04ac3c0e
FF		 3103 ieee80211_mgd_probe_ap_send(sdata);
3104 } else {
bdcbd8e0
JB		 3105 mlme_dbg(sdata,
3106 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3107 bssid);
95acac61
JB		 3108 ieee80211_sta_connection_lost(sdata, bssid,
3109 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 3110 }
3111 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3112 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3113 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3114 mlme_dbg(sdata,
3115 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3116 bssid, probe_wait_ms);
95acac61
JB		 3117 ieee80211_sta_connection_lost(sdata, bssid,
3118 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 3119 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3120 mlme_dbg(sdata,
3121 "No probe response from AP %pM after %dms, try %d/%i\n",
3122 bssid, probe_wait_ms,
3123 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3124 ieee80211_mgd_probe_ap_send(sdata);
3125 } else {
b291ba11
JB		 3126 /*
3127 * We actually lost the connection ... or did we?
3128 * Let's make sure!
3129 */
b38afa87
BG		 3130 wiphy_debug(local->hw.wiphy,
3131 "%s: No probe response from AP %pM"
3132 " after %dms, disconnecting.\n",
3133 sdata->name,
180205bd 3134 bssid, probe_wait_ms);
04ac3c0e 3135
95acac61
JB		 3136 ieee80211_sta_connection_lost(sdata, bssid,
3137 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 3138 }
3139 }
3140
77fdaa12 3141 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 3142
3143 mutex_lock(&local->mtx);
3144 ieee80211_recalc_idle(local);
3145 mutex_unlock(&local->mtx);
f0706e82
JB		 3146}
3147
b291ba11
JB		 3148static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3149{
3150 struct ieee80211_sub_if_data *sdata =
3151 (struct ieee80211_sub_if_data *) data;
3152 struct ieee80211_local *local = sdata->local;
3153
3154 if (local->quiescing)
3155 return;
3156
1e4dcd01
JO		 3157 ieee80211_queue_work(&sdata->local->hw,
3158 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3159}
3160
3161static void ieee80211_sta_conn_mon_timer(unsigned long data)
3162{
3163 struct ieee80211_sub_if_data *sdata =
3164 (struct ieee80211_sub_if_data *) data;
3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166 struct ieee80211_local *local = sdata->local;
3167
3168 if (local->quiescing)
3169 return;
3170
42935eca 3171 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3172}
3173
3174static void ieee80211_sta_monitor_work(struct work_struct *work)
3175{
3176 struct ieee80211_sub_if_data *sdata =
3177 container_of(work, struct ieee80211_sub_if_data,
3178 u.mgd.monitor_work);
3179
3180 ieee80211_mgd_probe_ap(sdata, false);
3181}
3182
9c6bd790
JB		 3183static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3184{
494f1fe5
EP		 3185 u32 flags;
3186
ad935687 3187 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3188 __ieee80211_stop_poll(sdata);
ad935687 3189
b291ba11 3190 /* let's probe the connection once */
494f1fe5
EP		 3191 flags = sdata->local->hw.flags;
3192 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3193 ieee80211_queue_work(&sdata->local->hw,
3194 &sdata->u.mgd.monitor_work);
b291ba11 3195 /* and do all the other regular work too */
64592c8f 3196 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3197 }
9c6bd790 3198}
f0706e82 3199
5bb644a0
JB		 3200#ifdef CONFIG_PM
3201void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3202{
3203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3204
3205 /*
3206 * we need to use atomic bitops for the running bits
3207 * only because both timers might fire at the same
3208 * time -- the code here is properly synchronised.
3209 */
3210
d1f5b7a3
JB		 3211 cancel_work_sync(&ifmgd->request_smps_work);
3212
0ecfe806 3213 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3214 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3215 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3216 if (del_timer_sync(&ifmgd->timer))
3217 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3218
3219 cancel_work_sync(&ifmgd->chswitch_work);
3220 if (del_timer_sync(&ifmgd->chswitch_timer))
3221 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3222
b291ba11
JB		 3223 /* these will just be re-established on connection */
3224 del_timer_sync(&ifmgd->conn_mon_timer);
3225 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3226}
3227
3228void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3229{
3230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3231
782d2673
JB		 3232 mutex_lock(&ifmgd->mtx);
3233 if (!ifmgd->associated) {
3234 mutex_unlock(&ifmgd->mtx);
676b58c2 3235 return;
782d2673 3236 }
676b58c2 3237
95acac61
JB		 3238 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3239 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3240 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3241 ieee80211_sta_connection_lost(sdata,
3242 ifmgd->associated->bssid,
3243 WLAN_REASON_UNSPECIFIED);
95acac61 3244 mutex_unlock(&ifmgd->mtx);
782d2673 3245 return;
95acac61 3246 }
782d2673 3247 mutex_unlock(&ifmgd->mtx);
95acac61 3248
5bb644a0
JB		 3249 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3250 add_timer(&ifmgd->timer);
3251 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3252 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3253 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3254
3255 mutex_lock(&sdata->local->mtx);
46090979 3256 ieee80211_restart_sta_timer(sdata);
925e64c3 3257 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3258}
3259#endif
3260
9c6bd790
JB		 3261/* interface setup */
3262void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3263{
46900298 3264 struct ieee80211_if_managed *ifmgd;
988c0f72 3265
46900298 3266 ifmgd = &sdata->u.mgd;
b291ba11 3267 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3268 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3269 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3270 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3271 INIT_WORK(&ifmgd->csa_connection_drop_work,
3272 ieee80211_csa_connection_drop_work);
d1f5b7a3 3273 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3274 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3275 (unsigned long) sdata);
b291ba11
JB		 3276 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3277 (unsigned long) sdata);
3278 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3279 (unsigned long) sdata);
46900298 3280 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3281 (unsigned long) sdata);
9c6bd790 3282
ab1faead 3283 ifmgd->flags = 0;
1478acb3 3284 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3285 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3286 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3287
77fdaa12 3288 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3289
3290 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3291 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3292 else
3293 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3294}
3295
77fdaa12
JB		 3296/* scan finished notification */
3297void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3298{
31ee67a1 3299 struct ieee80211_sub_if_data *sdata;
60f8b39c 3300
77fdaa12
JB		 3301 /* Restart STA timers */
3302 rcu_read_lock();
3303 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3304 ieee80211_restart_sta_timer(sdata);
3305 rcu_read_unlock();
3306}
60f8b39c 3307
77fdaa12
JB		 3308int ieee80211_max_network_latency(struct notifier_block *nb,
3309 unsigned long data, void *dummy)
3310{
3311 s32 latency_usec = (s32) data;
3312 struct ieee80211_local *local =
3313 container_of(nb, struct ieee80211_local,
3314 network_latency_notifier);
1fa6f4af 3315
77fdaa12
JB		 3316 mutex_lock(&local->iflist_mtx);
3317 ieee80211_recalc_ps(local, latency_usec);
3318 mutex_unlock(&local->iflist_mtx);
dfe67012 3319
77fdaa12 3320 return 0;
9c6bd790
JB		 3321}
3322
f2d9d270
JB		 3323static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3324{
3325 u32 ret;
3326 int tmp;
3327
3328 switch (c->width) {
3329 case NL80211_CHAN_WIDTH_20:
3330 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3331 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3332 break;
3333 case NL80211_CHAN_WIDTH_40:
3334 c->width = NL80211_CHAN_WIDTH_20;
3335 c->center_freq1 = c->chan->center_freq;
3336 ret = IEEE80211_STA_DISABLE_40MHZ |
3337 IEEE80211_STA_DISABLE_VHT;
3338 break;
3339 case NL80211_CHAN_WIDTH_80:
3340 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3341 /* n_P40 */
3342 tmp /= 2;
3343 /* freq_P40 */
3344 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3345 c->width = NL80211_CHAN_WIDTH_40;
3346 ret = IEEE80211_STA_DISABLE_VHT;
3347 break;
3348 case NL80211_CHAN_WIDTH_80P80:
3349 c->center_freq2 = 0;
3350 c->width = NL80211_CHAN_WIDTH_80;
3351 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3352 IEEE80211_STA_DISABLE_160MHZ;
3353 break;
3354 case NL80211_CHAN_WIDTH_160:
3355 /* n_P20 */
3356 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3357 /* n_P80 */
3358 tmp /= 4;
3359 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3360 c->width = NL80211_CHAN_WIDTH_80;
3361 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3362 IEEE80211_STA_DISABLE_160MHZ;
3363 break;
3364 default:
3365 case NL80211_CHAN_WIDTH_20_NOHT:
3366 WARN_ON_ONCE(1);
3367 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3368 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3369 break;
3370 }
3371
3372 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3373
3374 return ret;
3375}
3376
3377static u32
3378ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3379 struct ieee80211_supported_band *sband,
3380 struct ieee80211_channel *channel,
3381 const struct ieee80211_ht_operation *ht_oper,
3382 const struct ieee80211_vht_operation *vht_oper,
3383 struct cfg80211_chan_def *chandef)
3384{
3385 struct cfg80211_chan_def vht_chandef;
3386 u32 ht_cfreq, ret;
3387
3388 chandef->chan = channel;
3389 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3390 chandef->center_freq1 = channel->center_freq;
3391 chandef->center_freq2 = 0;
3392
3393 if (!ht_oper || !sband->ht_cap.ht_supported) {
3394 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3395 goto out;
3396 }
3397
3398 chandef->width = NL80211_CHAN_WIDTH_20;
3399
3400 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3401 channel->band);
3402 /* check that channel matches the right operating channel */
3403 if (channel->center_freq != ht_cfreq) {
3404 /*
3405 * It's possible that some APs are confused here;
3406 * Netgear WNDR3700 sometimes reports 4 higher than
3407 * the actual channel in association responses, but
3408 * since we look at probe response/beacon data here
3409 * it should be OK.
3410 */
3411 sdata_info(sdata,
3412 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3413 channel->center_freq, ht_cfreq,
3414 ht_oper->primary_chan, channel->band);
3415 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3416 goto out;
3417 }
3418
3419 /* check 40 MHz support, if we have it */
3420 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3421 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3422 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3423 chandef->width = NL80211_CHAN_WIDTH_40;
3424 chandef->center_freq1 += 10;
3425 break;
3426 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3427 chandef->width = NL80211_CHAN_WIDTH_40;
3428 chandef->center_freq1 -= 10;
3429 break;
3430 }
3431 } else {
3432 /* 40 MHz (and 80 MHz) must be supported for VHT */
3433 ret = IEEE80211_STA_DISABLE_VHT;
3434 goto out;
3435 }
3436
3437 if (!vht_oper || !sband->vht_cap.vht_supported) {
3438 ret = IEEE80211_STA_DISABLE_VHT;
3439 goto out;
3440 }
3441
3442 vht_chandef.chan = channel;
3443 vht_chandef.center_freq1 =
3444 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3445 channel->band);
3446 vht_chandef.center_freq2 = 0;
3447
3448 if (vht_oper->center_freq_seg2_idx)
3449 vht_chandef.center_freq2 =
3450 ieee80211_channel_to_frequency(
3451 vht_oper->center_freq_seg2_idx,
3452 channel->band);
3453
3454 switch (vht_oper->chan_width) {
3455 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3456 vht_chandef.width = chandef->width;
3457 break;
3458 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3459 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3460 break;
3461 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3462 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3463 break;
3464 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3465 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3466 break;
3467 default:
3468 sdata_info(sdata,
3469 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3470 vht_oper->chan_width);
3471 ret = IEEE80211_STA_DISABLE_VHT;
3472 goto out;
3473 }
3474
3475 if (!cfg80211_chandef_valid(&vht_chandef)) {
3476 sdata_info(sdata,
3477 "AP VHT information is invalid, disable VHT\n");
3478 ret = IEEE80211_STA_DISABLE_VHT;
3479 goto out;
3480 }
3481
3482 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3483 ret = 0;
3484 goto out;
3485 }
3486
3487 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3488 sdata_info(sdata,
3489 "AP VHT information doesn't match HT, disable VHT\n");
3490 ret = IEEE80211_STA_DISABLE_VHT;
3491 goto out;
3492 }
3493
3494 *chandef = vht_chandef;
3495
3496 ret = 0;
3497
3498 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3499 IEEE80211_CHAN_DISABLED)) {
3500 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3501 ret = IEEE80211_STA_DISABLE_HT |
3502 IEEE80211_STA_DISABLE_VHT;
3503 goto out;
3504 }
3505
3506 ret = chandef_downgrade(chandef);
3507 }
3508
3509 if (chandef->width != vht_chandef.width)
3510 sdata_info(sdata,
3511 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3512
3513out:
3514 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3515 return ret;
3516}
3517
3518static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3519 struct cfg80211_bss *cbss)
3520{
3521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3522 const u8 *ht_cap_ie, *vht_cap_ie;
3523 const struct ieee80211_ht_cap *ht_cap;
3524 const struct ieee80211_vht_cap *vht_cap;
3525 u8 chains = 1;
3526
3527 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3528 return chains;
3529
9caf0364 3530 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3531 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3532 ht_cap = (void *)(ht_cap_ie + 2);
3533 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3534 /*
3535 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3536 * "Tx Unequal Modulation Supported" fields.
3537 */
3538 }
3539
3540 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3541 return chains;
3542
9caf0364 3543 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3544 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3545 u8 nss;
3546 u16 tx_mcs_map;
3547
3548 vht_cap = (void *)(vht_cap_ie + 2);
3549 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3550 for (nss = 8; nss > 0; nss--) {
3551 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3552 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3553 break;
3554 }
3555 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3556 chains = max(chains, nss);
3557 }
3558
3559 return chains;
3560}
3561
b17166a7
JB		 3562static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3563 struct cfg80211_bss *cbss)
a1cf775d
JB		 3564{
3565 struct ieee80211_local *local = sdata->local;
3566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3567 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3568 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3569 struct ieee80211_supported_band *sband;
4bf88530 3570 struct cfg80211_chan_def chandef;
f2d9d270 3571 int ret;
a1cf775d 3572
24398e39
JB		 3573 sband = local->hw.wiphy->bands[cbss->channel->band];
3574
f2d9d270
JB		 3575 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3576 IEEE80211_STA_DISABLE_80P80MHZ |
3577 IEEE80211_STA_DISABLE_160MHZ);
3578
9caf0364
JB		 3579 rcu_read_lock();
3580
f2d9d270
JB		 3581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3582 sband->ht_cap.ht_supported) {
3583 const u8 *ht_oper_ie;
24398e39 3584
9caf0364 3585 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3586 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3587 ht_oper = (void *)(ht_oper_ie + 2);
3588 }
3589
f2d9d270
JB		 3590 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3591 sband->vht_cap.vht_supported) {
3592 const u8 *vht_oper_ie;
3593
9caf0364
JB		 3594 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3595 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3596 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3597 vht_oper = (void *)(vht_oper_ie + 2);
3598 if (vht_oper && !ht_oper) {
3599 vht_oper = NULL;
bdcbd8e0 3600 sdata_info(sdata,
f2d9d270
JB		 3601 "AP advertised VHT without HT, disabling both\n");
3602 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3603 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39
JB		 3604 }
3605 }
3606
f2d9d270
JB		 3607 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3608 cbss->channel,
3609 ht_oper, vht_oper,
3610 &chandef);
04ecd257 3611
f2d9d270
JB		 3612 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3613 local->rx_chains);
24398e39 3614
9caf0364
JB		 3615 rcu_read_unlock();
3616
04ecd257
JB		 3617 /* will change later if needed */
3618 sdata->smps_mode = IEEE80211_SMPS_OFF;
3619
f2d9d270
JB		 3620 /*
3621 * If this fails (possibly due to channel context sharing
3622 * on incompatible channels, e.g. 80+80 and 160 sharing the
3623 * same control channel) try to use a smaller bandwidth.
3624 */
3625 ret = ieee80211_vif_use_channel(sdata, &chandef,
3626 IEEE80211_CHANCTX_SHARED);
3627 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3628 ifmgd->flags |= chandef_downgrade(&chandef);
3629 return ret;
b17166a7
JB		 3630}
3631
3632static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3633 struct cfg80211_bss *cbss, bool assoc)
3634{
3635 struct ieee80211_local *local = sdata->local;
3636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3637 struct ieee80211_bss *bss = (void *)cbss->priv;
3638 struct sta_info *new_sta = NULL;
3639 bool have_sta = false;
3640 int err;
3641
3642 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3643 return -EINVAL;
3644
3645 if (assoc) {
3646 rcu_read_lock();
3647 have_sta = sta_info_get(sdata, cbss->bssid);
3648 rcu_read_unlock();
3649 }
3650
3651 if (!have_sta) {
3652 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3653 if (!new_sta)
3654 return -ENOMEM;
3655 }
3656
3657 mutex_lock(&local->mtx);
3658 ieee80211_recalc_idle(sdata->local);
3659 mutex_unlock(&local->mtx);
3660
13e0c8e3 3661 if (new_sta) {
5d6a1b06
JB		 3662 u32 rates = 0, basic_rates = 0;
3663 bool have_higher_than_11mbit;
3664 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3665 struct ieee80211_supported_band *sband;
3666
3667 sband = local->hw.wiphy->bands[cbss->channel->band];
3668
3669 err = ieee80211_prep_channel(sdata, cbss);
3670 if (err) {
3671 sta_info_free(local, new_sta);
3672 return err;
3673 }
5d6a1b06 3674
5d6a1b06
JB		 3675 ieee80211_get_rates(sband, bss->supp_rates,
3676 bss->supp_rates_len,
3677 &rates, &basic_rates,
3678 &have_higher_than_11mbit,
3679 &min_rate, &min_rate_index);
3680
3681 /*
3682 * This used to be a workaround for basic rates missing
3683 * in the association response frame. Now that we no
3684 * longer use the basic rates from there, it probably
3685 * doesn't happen any more, but keep the workaround so
3686 * in case some *other* APs are buggy in different ways
3687 * we can connect -- with a warning.
3688 */
3689 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3690 sdata_info(sdata,
3691 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3692 basic_rates = BIT(min_rate_index);
3693 }
3694
13e0c8e3 3695 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3696 sdata->vif.bss_conf.basic_rates = basic_rates;
3697
3698 /* cf. IEEE 802.11 9.2.12 */
55de908a 3699 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3700 have_higher_than_11mbit)
3701 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3702 else
3703 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3704
3705 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3706
8c358bcd
JB		 3707 /* set timing information */
3708 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3709 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3710 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3711
3712 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3713 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3714 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3715 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3716
3717 if (assoc)
13e0c8e3 3718 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3719
13e0c8e3
JB		 3720 err = sta_info_insert(new_sta);
3721 new_sta = NULL;
a1cf775d 3722 if (err) {
bdcbd8e0
JB		 3723 sdata_info(sdata,
3724 "failed to insert STA entry for the AP (error %d)\n",
3725 err);
a1cf775d
JB		 3726 return err;
3727 }
3728 } else
b203ca39 3729 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3730
3731 return 0;
3732}
3733
77fdaa12
JB		 3734/* config hooks */
3735int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3736 struct cfg80211_auth_request *req)
9c6bd790 3737{
66e67e41
JB		 3738 struct ieee80211_local *local = sdata->local;
3739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3740 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3741 u16 auth_alg;
66e67e41
JB		 3742 int err;
3743
3744 /* prepare auth data structure */
9c6bd790 3745
77fdaa12
JB		 3746 switch (req->auth_type) {
3747 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3748 auth_alg = WLAN_AUTH_OPEN;
3749 break;
3750 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3751 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3752 return -EOPNOTSUPP;
77fdaa12
JB		 3753 auth_alg = WLAN_AUTH_SHARED_KEY;
3754 break;
3755 case NL80211_AUTHTYPE_FT:
3756 auth_alg = WLAN_AUTH_FT;
3757 break;
3758 case NL80211_AUTHTYPE_NETWORK_EAP:
3759 auth_alg = WLAN_AUTH_LEAP;
3760 break;
6b8ece3a
JM		 3761 case NL80211_AUTHTYPE_SAE:
3762 auth_alg = WLAN_AUTH_SAE;
3763 break;
77fdaa12
JB		 3764 default:
3765 return -EOPNOTSUPP;
60f8b39c 3766 }
77fdaa12 3767
6b8ece3a
JM		 3768 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3769 req->ie_len, GFP_KERNEL);
66e67e41 3770 if (!auth_data)
9c6bd790 3771 return -ENOMEM;
77fdaa12 3772
66e67e41 3773 auth_data->bss = req->bss;
77fdaa12 3774
6b8ece3a
JM		 3775 if (req->sae_data_len >= 4) {
3776 __le16 *pos = (__le16 *) req->sae_data;
3777 auth_data->sae_trans = le16_to_cpu(pos[0]);
3778 auth_data->sae_status = le16_to_cpu(pos[1]);
3779 memcpy(auth_data->data, req->sae_data + 4,
3780 req->sae_data_len - 4);
3781 auth_data->data_len += req->sae_data_len - 4;
3782 }
3783
77fdaa12 3784 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3785 memcpy(&auth_data->data[auth_data->data_len],
3786 req->ie, req->ie_len);
3787 auth_data->data_len += req->ie_len;
9c6bd790 3788 }
77fdaa12 3789
fffd0934 3790 if (req->key && req->key_len) {
66e67e41
JB		 3791 auth_data->key_len = req->key_len;
3792 auth_data->key_idx = req->key_idx;
3793 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3794 }
3795
66e67e41 3796 auth_data->algorithm = auth_alg;
60f8b39c 3797
66e67e41 3798 /* try to authenticate/probe */
2a33bee2 3799
66e67e41 3800 mutex_lock(&ifmgd->mtx);
2a33bee2 3801
66e67e41
JB		 3802 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3803 ifmgd->assoc_data) {
3804 err = -EBUSY;
3805 goto err_free;
2a33bee2
GE		 3806 }
3807
66e67e41
JB		 3808 if (ifmgd->auth_data)
3809 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3810
66e67e41
JB		 3811 /* prep auth_data so we don't go into idle on disassoc */
3812 ifmgd->auth_data = auth_data;
af6b6374 3813
66e67e41 3814 if (ifmgd->associated)
37ad3888 3815 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3816
bdcbd8e0 3817 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3818
a1cf775d
JB		 3819 err = ieee80211_prep_connection(sdata, req->bss, false);
3820 if (err)
66e67e41 3821 goto err_clear;
af6b6374 3822
66e67e41
JB		 3823 err = ieee80211_probe_auth(sdata);
3824 if (err) {
66e67e41
JB		 3825 sta_info_destroy_addr(sdata, req->bss->bssid);
3826 goto err_clear;
3827 }
3828
3829 /* hold our own reference */
3830 cfg80211_ref_bss(auth_data->bss);
3831 err = 0;
3832 goto out_unlock;
3833
3834 err_clear:
3d2abdfd
EP		 3835 memset(ifmgd->bssid, 0, ETH_ALEN);
3836 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3837 ifmgd->auth_data = NULL;
3838 err_free:
3839 kfree(auth_data);
3840 out_unlock:
3841 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3842
66e67e41 3843 return err;
af6b6374
JB		 3844}
3845
77fdaa12
JB		 3846int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3847 struct cfg80211_assoc_request *req)
f0706e82 3848{
66e67e41 3849 struct ieee80211_local *local = sdata->local;
77fdaa12 3850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3851 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3852 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3853 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3854 struct ieee80211_supported_band *sband;
b08fbbd8 3855 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3856 int i, err;
f0706e82 3857
66e67e41
JB		 3858 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3859 if (!assoc_data)
3860 return -ENOMEM;
3861
9caf0364
JB		 3862 rcu_read_lock();
3863 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3864 if (!ssidie) {
3865 rcu_read_unlock();
3866 kfree(assoc_data);
3867 return -EINVAL;
3868 }
3869 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3870 assoc_data->ssid_len = ssidie[1];
3871 rcu_read_unlock();
3872
77fdaa12 3873 mutex_lock(&ifmgd->mtx);
9c87ba67 3874
66e67e41 3875 if (ifmgd->associated)
37ad3888 3876 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3877
3878 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3879 err = -EBUSY;
3880 goto err_free;
af6b6374 3881 }
77fdaa12 3882
66e67e41
JB		 3883 if (ifmgd->assoc_data) {
3884 err = -EBUSY;
3885 goto err_free;
3886 }
77fdaa12 3887
66e67e41
JB		 3888 if (ifmgd->auth_data) {
3889 bool match;
3890
3891 /* keep sta info, bssid if matching */
b203ca39 3892 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3893 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3894 }
3895
66e67e41 3896 /* prepare assoc data */
19c3b830 3897
d8ec4433
JO		 3898 ifmgd->beacon_crc_valid = false;
3899
de5036aa
JB		 3900 /*
3901 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3902 * We still associate in non-HT mode (11a/b/g) if any one of these
3903 * ciphers is configured as pairwise.
3904 * We can set this to true for non-11n hardware, that'll be checked
3905 * separately along with the peer capabilities.
3906 */
1c4cb928 3907 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3908 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3909 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3910 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3911 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3912 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3913 netdev_info(sdata->dev,
d545daba 3914 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3915 }
3916 }
77fdaa12 3917
d545daba 3918 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3919 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3920 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3921 }
ef96a842 3922
4e74bfdb
JB		 3923 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3924 sband = local->hw.wiphy->bands[req->bss->channel->band];
3925 if (!sband->ht_cap.ht_supported ||
1c4cb928 3926 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3927 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3928 if (!bss->wmm_used)
3929 netdev_info(sdata->dev,
3930 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3931 }
4e74bfdb 3932
d545daba
MP		 3933 /* disable VHT if we don't support it or the AP doesn't use WMM */
3934 if (!sband->vht_cap.vht_supported ||
3935 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3936 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3937 if (!bss->wmm_used)
3938 netdev_info(sdata->dev,
3939 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3940 }
3941
ef96a842
BG		 3942 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3943 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3944 sizeof(ifmgd->ht_capa_mask));
3945
77fdaa12 3946 if (req->ie && req->ie_len) {
66e67e41
JB		 3947 memcpy(assoc_data->ie, req->ie, req->ie_len);
3948 assoc_data->ie_len = req->ie_len;
3949 }
f679f65d 3950
66e67e41 3951 assoc_data->bss = req->bss;
f679f65d 3952
af6b6374
JB		 3953 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3954 if (ifmgd->powersave)
04ecd257 3955 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3956 else
04ecd257 3957 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3958 } else
04ecd257 3959 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3960
66e67e41 3961 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3962 assoc_data->wmm = bss->wmm_used &&
3963 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3964 assoc_data->supp_rates = bss->supp_rates;
3965 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 3966
9caf0364 3967 rcu_read_lock();
9dde6423
JB		 3968 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3969 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3970 assoc_data->ap_ht_param =
3971 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3972 else
a8243b72 3973 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 3974 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3975 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3976 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3977 sizeof(struct ieee80211_vht_cap));
3978 else
3979 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 3980 rcu_read_unlock();
63f170e0 3981
ab13315a
KV		 3982 if (bss->wmm_used && bss->uapsd_supported &&
3983 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3984 assoc_data->uapsd = true;
ab13315a
KV		 3985 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3986 } else {
76f0303d 3987 assoc_data->uapsd = false;
ab13315a
KV		 3988 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3989 }
3990
77fdaa12 3991 if (req->prev_bssid)
66e67e41 3992 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3993
3994 if (req->use_mfp) {
3995 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3996 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3997 } else {
3998 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3999 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4000 }
4001
4002 if (req->crypto.control_port)
4003 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4004 else
4005 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4006
a621fa4d
JB		 4007 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4008 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4009
66e67e41
JB		 4010 /* kick off associate process */
4011
4012 ifmgd->assoc_data = assoc_data;
826262c3 4013 ifmgd->dtim_period = 0;
66e67e41 4014
a1cf775d
JB		 4015 err = ieee80211_prep_connection(sdata, req->bss, true);
4016 if (err)
4017 goto err_clear;
66e67e41 4018
c65dd147
EG		 4019 rcu_read_lock();
4020 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4021
c65dd147
EG		 4022 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4023 !beacon_ies) {
4024 /*
4025 * Wait up to one beacon interval ...
4026 * should this be more if we miss one?
4027 */
4028 sdata_info(sdata, "waiting for beacon from %pM\n",
4029 ifmgd->bssid);
4030 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4031 assoc_data->need_beacon = true;
4032 } else if (beacon_ies) {
4033 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4034 beacon_ies->data,
4035 beacon_ies->len);
4036 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4037 const struct ieee80211_tim_ie *tim;
4038 tim = (void *)(tim_ie + 2);
4039 ifmgd->dtim_period = tim->dtim_period;
826262c3 4040 }
66e67e41 4041 assoc_data->have_beacon = true;
66e67e41 4042 assoc_data->timeout = jiffies;
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:
7da7cc1d 4114 mutex_lock(&sdata->local->mtx);
bc83b681 4115 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4116 mutex_unlock(&sdata->local->mtx);
bc83b681 4117
86552017
JB		 4118 if (sent_frame)
4119 __cfg80211_send_deauth(sdata->dev, frame_buf,
4120 IEEE80211_DEAUTH_FRAME_LEN);
4121
f0706e82
JB		 4122 return 0;
4123}
84363e6e 4124
77fdaa12 4125int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4126 struct cfg80211_disassoc_request *req)
9c6bd790 4127{
77fdaa12 4128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4129 u8 bssid[ETH_ALEN];
6ae16775 4130 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4131
77fdaa12 4132 mutex_lock(&ifmgd->mtx);
10f644a4 4133
8d8b261a
JB		 4134 /*
4135 * cfg80211 should catch this ... but it's racy since
4136 * we can receive a disassoc frame, process it, hand it
4137 * to cfg80211 while that's in a locked section already
4138 * trying to tell us that the user wants to disconnect.
4139 */
0c1ad2ca 4140 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4141 mutex_unlock(&ifmgd->mtx);
4142 return -ENOLINK;
4143 }
4144
bdcbd8e0
JB		 4145 sdata_info(sdata,
4146 "disassociating from %pM by local choice (reason=%d)\n",
4147 req->bss->bssid, req->reason_code);
0ff71613 4148
e69e95db 4149 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4150 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4151 req->reason_code, !req->local_state_change,
4152 frame_buf);
77fdaa12 4153 mutex_unlock(&ifmgd->mtx);
10f644a4 4154
6ae16775
AQ		 4155 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4156 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4157
7da7cc1d 4158 mutex_lock(&sdata->local->mtx);
bc83b681 4159 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4160 mutex_unlock(&sdata->local->mtx);
bc83b681 4161
10f644a4
JB		 4162 return 0;
4163}
026331c4 4164
afa762f6 4165void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4166{
4167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4168
4169 mutex_lock(&ifmgd->mtx);
4170 if (ifmgd->assoc_data)
4171 ieee80211_destroy_assoc_data(sdata, false);
4172 if (ifmgd->auth_data)
4173 ieee80211_destroy_auth_data(sdata, false);
4174 del_timer_sync(&ifmgd->timer);
4175 mutex_unlock(&ifmgd->mtx);
4176}
4177
a97c13c3
JO		 4178void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4179 enum nl80211_cqm_rssi_threshold_event rssi_event,
4180 gfp_t gfp)
4181{
4182 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4183
b5878a2d
JB		 4184 trace_api_cqm_rssi_notify(sdata, rssi_event);
4185
a97c13c3
JO		 4186 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4187}
4188EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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