projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: improve latency and throughput while software scanning
[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
882a7c69
JB		 1830static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1831 bool transmit_frame)
1e4dcd01
JO		 1832{
1833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1834 struct ieee80211_local *local = sdata->local;
6ae16775 1835 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1836
1837 mutex_lock(&ifmgd->mtx);
1838 if (!ifmgd->associated) {
1839 mutex_unlock(&ifmgd->mtx);
1840 return;
1841 }
1842
37ad3888
JB		 1843 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1844 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1845 transmit_frame, frame_buf);
1846 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1847 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1848
1e4dcd01
JO		 1849 /*
1850 * must be outside lock due to cfg80211,
1851 * but that's not a problem.
1852 */
6ae16775 1853 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1854
1855 mutex_lock(&local->mtx);
1856 ieee80211_recalc_idle(local);
1857 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1858}
1859
cc74c0c7 1860static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1861{
1862 struct ieee80211_sub_if_data *sdata =
1863 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1864 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1866 struct sta_info *sta;
1867
1868 if (ifmgd->associated) {
30fa9047 1869 rcu_read_lock();
a85e1d55
PS		 1870 sta = sta_info_get(sdata, ifmgd->bssid);
1871 if (sta)
1872 sta->beacon_loss_count++;
30fa9047 1873 rcu_read_unlock();
a85e1d55 1874 }
b291ba11 1875
882a7c69
JB		 1876 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1877 sdata_info(sdata, "Connection to AP %pM lost\n",
1878 ifmgd->bssid);
1879 __ieee80211_disconnect(sdata, false);
1880 } else {
1e4dcd01 1881 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1882 }
1883}
1884
1885static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1886{
1887 struct ieee80211_sub_if_data *sdata =
1888 container_of(work, struct ieee80211_sub_if_data,
1889 u.mgd.csa_connection_drop_work);
1890
1891 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1892 IEEE80211_QUEUE_STOP_REASON_CSA);
1893 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1894}
1895
04de8381
KV		 1896void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1897{
1898 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1899 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1900
b5878a2d
JB		 1901 trace_api_beacon_loss(sdata);
1902
1e4dcd01
JO		 1903 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1904 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1905}
1906EXPORT_SYMBOL(ieee80211_beacon_loss);
1907
1e4dcd01
JO		 1908void ieee80211_connection_loss(struct ieee80211_vif *vif)
1909{
1910 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1911 struct ieee80211_hw *hw = &sdata->local->hw;
1912
b5878a2d
JB		 1913 trace_api_connection_loss(sdata);
1914
1e4dcd01
JO		 1915 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1916 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1917}
1918EXPORT_SYMBOL(ieee80211_connection_loss);
1919
1920
66e67e41
JB		 1921static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1922 bool assoc)
1923{
1924 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1925
1926 lockdep_assert_held(&sdata->u.mgd.mtx);
1927
66e67e41
JB		 1928 if (!assoc) {
1929 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1930
1931 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1932 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1933 sdata->u.mgd.flags = 0;
55de908a 1934 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1935 }
1936
1937 cfg80211_put_bss(auth_data->bss);
1938 kfree(auth_data);
1939 sdata->u.mgd.auth_data = NULL;
1940}
1941
1942static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1943 struct ieee80211_mgmt *mgmt, size_t len)
1944{
1672c0e3 1945 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 1946 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1947 u8 *pos;
1948 struct ieee802_11_elems elems;
1672c0e3 1949 u32 tx_flags = 0;
66e67e41
JB		 1950
1951 pos = mgmt->u.auth.variable;
1952 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1953 if (!elems.challenge)
1954 return;
1955 auth_data->expected_transaction = 4;
a1845fc7 1956 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 1957 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1958 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
1959 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 1960 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1961 elems.challenge - 2, elems.challenge_len + 2,
1962 auth_data->bss->bssid, auth_data->bss->bssid,
1963 auth_data->key, auth_data->key_len,
1672c0e3 1964 auth_data->key_idx, tx_flags);
66e67e41
JB		 1965}
1966
1967static enum rx_mgmt_action __must_check
1968ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1969 struct ieee80211_mgmt *mgmt, size_t len)
1970{
1971 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1972 u8 bssid[ETH_ALEN];
1973 u16 auth_alg, auth_transaction, status_code;
1974 struct sta_info *sta;
1975
1976 lockdep_assert_held(&ifmgd->mtx);
1977
1978 if (len < 24 + 6)
1979 return RX_MGMT_NONE;
1980
1981 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1982 return RX_MGMT_NONE;
1983
1984 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1985
b203ca39 1986 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1987 return RX_MGMT_NONE;
1988
1989 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1990 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1991 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1992
1993 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1994 auth_transaction != ifmgd->auth_data->expected_transaction) {
1995 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1996 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1997 auth_transaction,
1998 ifmgd->auth_data->expected_transaction);
66e67e41 1999 return RX_MGMT_NONE;
0f4126e8 2000 }
66e67e41
JB		 2001
2002 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2003 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2004 mgmt->sa, status_code);
dac211ec
EP		 2005 ieee80211_destroy_auth_data(sdata, false);
2006 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2007 }
2008
2009 switch (ifmgd->auth_data->algorithm) {
2010 case WLAN_AUTH_OPEN:
2011 case WLAN_AUTH_LEAP:
2012 case WLAN_AUTH_FT:
6b8ece3a 2013 case WLAN_AUTH_SAE:
66e67e41
JB		 2014 break;
2015 case WLAN_AUTH_SHARED_KEY:
2016 if (ifmgd->auth_data->expected_transaction != 4) {
2017 ieee80211_auth_challenge(sdata, mgmt, len);
2018 /* need another frame */
2019 return RX_MGMT_NONE;
2020 }
2021 break;
2022 default:
2023 WARN_ONCE(1, "invalid auth alg %d",
2024 ifmgd->auth_data->algorithm);
2025 return RX_MGMT_NONE;
2026 }
2027
bdcbd8e0 2028 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2029 ifmgd->auth_data->done = true;
2030 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2031 run_again(ifmgd, ifmgd->auth_data->timeout);
2032
6b8ece3a
JM		 2033 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2034 ifmgd->auth_data->expected_transaction != 2) {
2035 /*
2036 * Report auth frame to user space for processing since another
2037 * round of Authentication frames is still needed.
2038 */
2039 return RX_MGMT_CFG80211_RX_AUTH;
2040 }
2041
66e67e41
JB		 2042 /* move station state to auth */
2043 mutex_lock(&sdata->local->sta_mtx);
2044 sta = sta_info_get(sdata, bssid);
2045 if (!sta) {
2046 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2047 goto out_err;
2048 }
2049 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2050 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2051 goto out_err;
2052 }
2053 mutex_unlock(&sdata->local->sta_mtx);
2054
2055 return RX_MGMT_CFG80211_RX_AUTH;
2056 out_err:
2057 mutex_unlock(&sdata->local->sta_mtx);
2058 /* ignore frame -- wait for timeout */
2059 return RX_MGMT_NONE;
2060}
2061
2062
77fdaa12
JB		 2063static enum rx_mgmt_action __must_check
2064ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2065 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2066{
46900298 2067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2068 const u8 *bssid = NULL;
f0706e82
JB		 2069 u16 reason_code;
2070
66e67e41
JB		 2071 lockdep_assert_held(&ifmgd->mtx);
2072
f4ea83dd 2073 if (len < 24 + 2)
77fdaa12 2074 return RX_MGMT_NONE;
f0706e82 2075
66e67e41 2076 if (!ifmgd->associated ||
b203ca39 2077 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2078 return RX_MGMT_NONE;
77fdaa12 2079
0c1ad2ca 2080 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2081
2082 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2083
bdcbd8e0
JB		 2084 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2085 bssid, reason_code);
77fdaa12 2086
37ad3888
JB		 2087 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2088
7da7cc1d 2089 mutex_lock(&sdata->local->mtx);
63f170e0 2090 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2091 mutex_unlock(&sdata->local->mtx);
f0706e82 2092
77fdaa12 2093 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2094}
2095
2096
77fdaa12
JB		 2097static enum rx_mgmt_action __must_check
2098ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2099 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2100{
46900298 2101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2102 u16 reason_code;
2103
66e67e41 2104 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2105
66e67e41 2106 if (len < 24 + 2)
77fdaa12
JB		 2107 return RX_MGMT_NONE;
2108
66e67e41 2109 if (!ifmgd->associated ||
b203ca39 2110 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2111 return RX_MGMT_NONE;
f0706e82
JB		 2112
2113 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2114
bdcbd8e0
JB		 2115 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2116 mgmt->sa, reason_code);
f0706e82 2117
37ad3888
JB		 2118 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2119
7da7cc1d 2120 mutex_lock(&sdata->local->mtx);
bc83b681 2121 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2122 mutex_unlock(&sdata->local->mtx);
37ad3888 2123
77fdaa12 2124 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2125}
2126
c74d084f
CL		 2127static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2128 u8 *supp_rates, unsigned int supp_rates_len,
2129 u32 *rates, u32 *basic_rates,
2130 bool *have_higher_than_11mbit,
2131 int *min_rate, int *min_rate_index)
2132{
2133 int i, j;
2134
2135 for (i = 0; i < supp_rates_len; i++) {
2136 int rate = (supp_rates[i] & 0x7f) * 5;
2137 bool is_basic = !!(supp_rates[i] & 0x80);
2138
2139 if (rate > 110)
2140 *have_higher_than_11mbit = true;
2141
2142 /*
2143 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2144 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2145 *
2146 * Note: Even through the membership selector and the basic
2147 * rate flag share the same bit, they are not exactly
2148 * the same.
2149 */
2150 if (!!(supp_rates[i] & 0x80) &&
2151 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2152 continue;
2153
2154 for (j = 0; j < sband->n_bitrates; j++) {
2155 if (sband->bitrates[j].bitrate == rate) {
2156 *rates |= BIT(j);
2157 if (is_basic)
2158 *basic_rates |= BIT(j);
2159 if (rate < *min_rate) {
2160 *min_rate = rate;
2161 *min_rate_index = j;
2162 }
2163 break;
2164 }
2165 }
2166 }
2167}
f0706e82 2168
66e67e41
JB		 2169static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2170 bool assoc)
2171{
2172 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2173
2174 lockdep_assert_held(&sdata->u.mgd.mtx);
2175
66e67e41
JB		 2176 if (!assoc) {
2177 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2178
2179 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2180 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2181 sdata->u.mgd.flags = 0;
55de908a 2182 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2183 }
2184
2185 kfree(assoc_data);
2186 sdata->u.mgd.assoc_data = NULL;
2187}
2188
2189static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2190 struct cfg80211_bss *cbss,
af6b6374 2191 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2192{
46900298 2193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2194 struct ieee80211_local *local = sdata->local;
8318d78a 2195 struct ieee80211_supported_band *sband;
f0706e82 2196 struct sta_info *sta;
af6b6374 2197 u8 *pos;
af6b6374 2198 u16 capab_info, aid;
f0706e82 2199 struct ieee802_11_elems elems;
bda3933a 2200 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2201 u32 changed = 0;
c74d084f 2202 int err;
f0706e82 2203
af6b6374 2204 /* AssocResp and ReassocResp have identical structure */
f0706e82 2205
f0706e82 2206 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2207 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2208
1dd84aa2 2209 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2210 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2211 aid);
1dd84aa2
JB		 2212 aid &= ~(BIT(15) | BIT(14));
2213
05cb9108
JB		 2214 ifmgd->broken_ap = false;
2215
2216 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2217 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2218 aid);
05cb9108
JB		 2219 aid = 0;
2220 ifmgd->broken_ap = true;
2221 }
2222
af6b6374
JB		 2223 pos = mgmt->u.assoc_resp.variable;
2224 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2225
f0706e82 2226 if (!elems.supp_rates) {
bdcbd8e0 2227 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2228 return false;
f0706e82
JB		 2229 }
2230
46900298 2231 ifmgd->aid = aid;
f0706e82 2232
2a33bee2
GE		 2233 mutex_lock(&sdata->local->sta_mtx);
2234 /*
2235 * station info was already allocated and inserted before
2236 * the association and should be available to us
2237 */
7852e361 2238 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2239 if (WARN_ON(!sta)) {
2240 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2241 return false;
77fdaa12 2242 }
05e5e883 2243
55de908a 2244 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2245
a8243b72 2246 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2247 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2248 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2249
64f68e5d
JB		 2250 sta->supports_40mhz =
2251 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2252
818255ea
MP		 2253 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2254 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2255 elems.vht_cap_elem,
2256 &sta->sta.vht_cap);
2257
4b7679a5 2258 rate_control_rate_init(sta);
f0706e82 2259
46900298 2260 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2261 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2262
ddf4ac53 2263 if (elems.wmm_param)
c2c98fde 2264 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2265
c8987876
JB		 2266 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2267 if (!err)
2268 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2269 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2270 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2271 if (err) {
bdcbd8e0
JB		 2272 sdata_info(sdata,
2273 "failed to move station %pM to desired state\n",
2274 sta->sta.addr);
c8987876
JB		 2275 WARN_ON(__sta_info_destroy(sta));
2276 mutex_unlock(&sdata->local->sta_mtx);
2277 return false;
2278 }
2279
7852e361 2280 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2281
f2176d72
JO		 2282 /*
2283 * Always handle WMM once after association regardless
2284 * of the first value the AP uses. Setting -1 here has
2285 * that effect because the AP values is an unsigned
2286 * 4-bit value.
2287 */
2288 ifmgd->wmm_last_param_set = -1;
2289
ddf4ac53 2290 if (elems.wmm_param)
4ced3f74 2291 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2292 elems.wmm_param_len);
aa837e1d 2293 else
3abead59
JB		 2294 ieee80211_set_wmm_default(sdata, false);
2295 changed |= BSS_CHANGED_QOS;
f0706e82 2296
074d46d1 2297 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2298 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2299 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2300 cbss->bssid, false);
ae5eb026 2301
60f8b39c
JB		 2302 /* set AID and assoc capability,
2303 * ieee80211_set_associated() will tell the driver */
2304 bss_conf->aid = aid;
2305 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2306 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2307
d524215f
FF		 2308 /*
2309 * If we're using 4-addr mode, let the AP know that we're
2310 * doing so, so that it can create the STA VLAN on its side
2311 */
2312 if (ifmgd->use_4addr)
2313 ieee80211_send_4addr_nullfunc(local, sdata);
2314
15b7b062 2315 /*
b291ba11
JB		 2316 * Start timer to probe the connection to the AP now.
2317 * Also start the timer that will detect beacon loss.
15b7b062 2318 */
b291ba11 2319 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2320 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2321
af6b6374 2322 return true;
f0706e82
JB		 2323}
2324
66e67e41
JB		 2325static enum rx_mgmt_action __must_check
2326ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2327 struct ieee80211_mgmt *mgmt, size_t len,
2328 struct cfg80211_bss **bss)
2329{
2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2331 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2332 u16 capab_info, status_code, aid;
2333 struct ieee802_11_elems elems;
2334 u8 *pos;
2335 bool reassoc;
2336
2337 lockdep_assert_held(&ifmgd->mtx);
2338
2339 if (!assoc_data)
2340 return RX_MGMT_NONE;
b203ca39 2341 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2342 return RX_MGMT_NONE;
2343
2344 /*
2345 * AssocResp and ReassocResp have identical structure, so process both
2346 * of them in this function.
2347 */
2348
2349 if (len < 24 + 6)
2350 return RX_MGMT_NONE;
2351
2352 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2353 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2354 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2355 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2356
bdcbd8e0
JB		 2357 sdata_info(sdata,
2358 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2359 reassoc ? "Rea" : "A", mgmt->sa,
2360 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2361
2362 pos = mgmt->u.assoc_resp.variable;
2363 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2364
2365 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2366 elems.timeout_int && elems.timeout_int_len == 5 &&
2367 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2368 u32 tu, ms;
2369 tu = get_unaligned_le32(elems.timeout_int + 1);
2370 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2371 sdata_info(sdata,
2372 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2373 mgmt->sa, tu, ms);
66e67e41
JB		 2374 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2375 if (ms > IEEE80211_ASSOC_TIMEOUT)
2376 run_again(ifmgd, assoc_data->timeout);
2377 return RX_MGMT_NONE;
2378 }
2379
2380 *bss = assoc_data->bss;
2381
2382 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2383 sdata_info(sdata, "%pM denied association (code=%d)\n",
2384 mgmt->sa, status_code);
66e67e41
JB		 2385 ieee80211_destroy_assoc_data(sdata, false);
2386 } else {
66e67e41
JB		 2387 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2388 /* oops -- internal error -- send timeout for now */
10a9109f 2389 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2390 cfg80211_put_bss(*bss);
2391 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2392 }
635d999f 2393 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2394
2395 /*
2396 * destroy assoc_data afterwards, as otherwise an idle
2397 * recalc after assoc_data is NULL but before associated
2398 * is set can cause the interface to go idle
2399 */
2400 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2401 }
2402
2403 return RX_MGMT_CFG80211_RX_ASSOC;
2404}
8e3c1b77 2405
98c8fccf 2406static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2407 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2408 struct ieee80211_rx_status *rx_status,
d45c4172 2409 struct ieee802_11_elems *elems)
98c8fccf
JB		 2410{
2411 struct ieee80211_local *local = sdata->local;
2412 int freq;
c2b13452 2413 struct ieee80211_bss *bss;
98c8fccf 2414 struct ieee80211_channel *channel;
56007a02
JB		 2415 bool need_ps = false;
2416
826262c3
JB		 2417 if ((sdata->u.mgd.associated &&
2418 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2419 (sdata->u.mgd.assoc_data &&
2420 ether_addr_equal(mgmt->bssid,
2421 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2422 /* not previously set so we may need to recalc */
826262c3
JB		 2423 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2424
2425 if (elems->tim && !elems->parse_error) {
2426 struct ieee80211_tim_ie *tim_ie = elems->tim;
2427 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2428 }
56007a02 2429 }
98c8fccf
JB		 2430
2431 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2432 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2433 rx_status->band);
98c8fccf
JB		 2434 else
2435 freq = rx_status->freq;
2436
2437 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2438
2439 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2440 return;
2441
98c8fccf 2442 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2443 channel);
77fdaa12
JB		 2444 if (bss)
2445 ieee80211_rx_bss_put(local, bss);
2446
2447 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2448 return;
2449
56007a02
JB		 2450 if (need_ps) {
2451 mutex_lock(&local->iflist_mtx);
2452 ieee80211_recalc_ps(local, -1);
2453 mutex_unlock(&local->iflist_mtx);
2454 }
2455
5bc1420b
JB		 2456 if (elems->ch_switch_ie &&
2457 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2458 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2459 bss, rx_status->mactime);
f0706e82
JB		 2460}
2461
2462
f698d856 2463static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2464 struct sk_buff *skb)
f0706e82 2465{
af6b6374 2466 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2467 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2468 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2469 size_t baselen, len = skb->len;
ae6a44e3
EK		 2470 struct ieee802_11_elems elems;
2471
15b7b062
KV		 2472 ifmgd = &sdata->u.mgd;
2473
77fdaa12
JB		 2474 ASSERT_MGD_MTX(ifmgd);
2475
b203ca39 2476 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2477 return; /* ignore ProbeResp to foreign address */
2478
ae6a44e3
EK		 2479 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2480 if (baselen > len)
2481 return;
2482
2483 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2484 &elems);
2485
d45c4172 2486 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2487
77fdaa12 2488 if (ifmgd->associated &&
b203ca39 2489 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2490 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2491
2492 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2493 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2494 /* got probe response, continue with auth */
bdcbd8e0 2495 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2496 ifmgd->auth_data->tries = 0;
2497 ifmgd->auth_data->timeout = jiffies;
2498 run_again(ifmgd, ifmgd->auth_data->timeout);
2499 }
f0706e82
JB		 2500}
2501
d91f36db
JB		 2502/*
2503 * This is the canonical list of information elements we care about,
2504 * the filter code also gives us all changes to the Microsoft OUI
2505 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2506 *
2507 * We implement beacon filtering in software since that means we can
2508 * avoid processing the frame here and in cfg80211, and userspace
2509 * will not be able to tell whether the hardware supports it or not.
2510 *
2511 * XXX: This list needs to be dynamic -- userspace needs to be able to
2512 * add items it requires. It also needs to be able to tell us to
2513 * look out for other vendor IEs.
2514 */
2515static const u64 care_about_ies =
1d4df3a5
JB		 2516 (1ULL << WLAN_EID_COUNTRY) |
2517 (1ULL << WLAN_EID_ERP_INFO) |
2518 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2519 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2520 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2521 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2522
f698d856 2523static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2524 struct ieee80211_mgmt *mgmt,
2525 size_t len,
2526 struct ieee80211_rx_status *rx_status)
2527{
d91f36db 2528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2529 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2530 size_t baselen;
2531 struct ieee802_11_elems elems;
f698d856 2532 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2533 struct ieee80211_chanctx_conf *chanctx_conf;
2534 struct ieee80211_channel *chan;
471b3efd 2535 u32 changed = 0;
f87ad637 2536 bool erp_valid;
7a5158ef 2537 u8 erp_value = 0;
d91f36db 2538 u32 ncrc;
77fdaa12
JB		 2539 u8 *bssid;
2540
66e67e41 2541 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2542
ae6a44e3
EK		 2543 /* Process beacon from the current BSS */
2544 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2545 if (baselen > len)
2546 return;
2547
55de908a
JB		 2548 rcu_read_lock();
2549 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2550 if (!chanctx_conf) {
2551 rcu_read_unlock();
f0706e82 2552 return;
55de908a
JB		 2553 }
2554
4bf88530 2555 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2556 rcu_read_unlock();
2557 return;
2558 }
4bf88530 2559 chan = chanctx_conf->def.chan;
55de908a 2560 rcu_read_unlock();
f0706e82 2561
c65dd147 2562 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2563 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2564 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2565 len - baselen, &elems);
77fdaa12 2566
d45c4172 2567 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2568 ifmgd->assoc_data->have_beacon = true;
c65dd147 2569 ifmgd->assoc_data->need_beacon = false;
66e67e41
JB		 2570 /* continue assoc process */
2571 ifmgd->assoc_data->timeout = jiffies;
2572 run_again(ifmgd, ifmgd->assoc_data->timeout);
2573 return;
2574 }
77fdaa12 2575
66e67e41 2576 if (!ifmgd->associated ||
b203ca39 2577 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2578 return;
66e67e41 2579 bssid = ifmgd->associated->bssid;
f0706e82 2580
17e4ec14
JM		 2581 /* Track average RSSI from the Beacon frames of the current AP */
2582 ifmgd->last_beacon_signal = rx_status->signal;
2583 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2584 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2585 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2586 ifmgd->last_cqm_event_signal = 0;
391a200a 2587 ifmgd->count_beacon_signal = 1;
615f7b9b 2588 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2589 } else {
2590 ifmgd->ave_beacon_signal =
2591 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2592 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2593 ifmgd->ave_beacon_signal) / 16;
391a200a 2594 ifmgd->count_beacon_signal++;
17e4ec14 2595 }
615f7b9b
MV		 2596
2597 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2598 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2599 int sig = ifmgd->ave_beacon_signal;
2600 int last_sig = ifmgd->last_ave_beacon_signal;
2601
2602 /*
2603 * if signal crosses either of the boundaries, invoke callback
2604 * with appropriate parameters
2605 */
2606 if (sig > ifmgd->rssi_max_thold &&
2607 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2608 ifmgd->last_ave_beacon_signal = sig;
887da917 2609 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2610 } else if (sig < ifmgd->rssi_min_thold &&
2611 (last_sig >= ifmgd->rssi_max_thold ||
2612 last_sig == 0)) {
2613 ifmgd->last_ave_beacon_signal = sig;
887da917 2614 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2615 }
2616 }
2617
17e4ec14 2618 if (bss_conf->cqm_rssi_thold &&
391a200a 2619 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2620 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2621 int sig = ifmgd->ave_beacon_signal / 16;
2622 int last_event = ifmgd->last_cqm_event_signal;
2623 int thold = bss_conf->cqm_rssi_thold;
2624 int hyst = bss_conf->cqm_rssi_hyst;
2625 if (sig < thold &&
2626 (last_event == 0 || sig < last_event - hyst)) {
2627 ifmgd->last_cqm_event_signal = sig;
2628 ieee80211_cqm_rssi_notify(
2629 &sdata->vif,
2630 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2631 GFP_KERNEL);
2632 } else if (sig > thold &&
2633 (last_event == 0 || sig > last_event + hyst)) {
2634 ifmgd->last_cqm_event_signal = sig;
2635 ieee80211_cqm_rssi_notify(
2636 &sdata->vif,
2637 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2638 GFP_KERNEL);
2639 }
2640 }
2641
b291ba11 2642 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2643 mlme_dbg_ratelimited(sdata,
2644 "cancelling probereq poll due to a received beacon\n");
925e64c3 2645 mutex_lock(&local->mtx);
b291ba11 2646 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2647 ieee80211_run_deferred_scan(local);
2648 mutex_unlock(&local->mtx);
2649
4e751843
JB		 2650 mutex_lock(&local->iflist_mtx);
2651 ieee80211_recalc_ps(local, -1);
2652 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2653 }
2654
b291ba11
JB		 2655 /*
2656 * Push the beacon loss detection into the future since
2657 * we are processing a beacon from the AP just now.
2658 */
d3a910a8 2659 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2660
d91f36db
JB		 2661 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2662 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2663 len - baselen, &elems,
2664 care_about_ies, ncrc);
2665
25c9c875 2666 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2667 bool directed_tim = ieee80211_check_tim(elems.tim,
2668 elems.tim_len,
2669 ifmgd->aid);
1fb3606b 2670 if (directed_tim) {
572e0012 2671 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2672 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2673 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2674 ieee80211_hw_config(local,
2675 IEEE80211_CONF_CHANGE_PS);
2676 }
572e0012 2677 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2678 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2679 local->pspolling = true;
2680
2681 /*
2682 * Here is assumed that the driver will be
2683 * able to send ps-poll frame and receive a
2684 * response even though power save mode is
2685 * enabled, but some drivers might require
2686 * to disable power save here. This needs
2687 * to be investigated.
2688 */
2689 ieee80211_send_pspoll(local, sdata);
2690 }
a97b77b9
VN		 2691 }
2692 }
7a5158ef 2693
488dd7b5
JB		 2694 if (sdata->vif.p2p) {
2695 u8 noa[2];
2696 int ret;
2697
2698 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2699 len - baselen,
2700 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2701 noa, sizeof(noa));
2702 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2703 bss_conf->p2p_oppps = noa[1] & 0x80;
2704 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2705 changed |= BSS_CHANGED_P2P_PS;
2706 sdata->u.mgd.p2p_noa_index = noa[0];
2707 /*
2708 * make sure we update all information, the CRC
2709 * mechanism doesn't look at P2P attributes.
2710 */
2711 ifmgd->beacon_crc_valid = false;
2712 }
2713 }
2714
d8ec4433 2715 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2716 return;
2717 ifmgd->beacon_crc = ncrc;
d8ec4433 2718 ifmgd->beacon_crc_valid = true;
30196673 2719
d45c4172 2720 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2721
2722 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2723 elems.wmm_param_len))
2724 changed |= BSS_CHANGED_QOS;
2725
c65dd147
EG		 2726 /*
2727 * If we haven't had a beacon before, tell the driver about the
2728 * DTIM period now.
2729 */
2730 if (!bss_conf->dtim_period) {
2731 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2732 if (elems.tim)
2733 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2734 else
2735 bss_conf->dtim_period = 1;
2736 changed |= BSS_CHANGED_DTIM_PERIOD;
2737 }
2738
7a5158ef
JB		 2739 if (elems.erp_info && elems.erp_info_len >= 1) {
2740 erp_valid = true;
2741 erp_value = elems.erp_info[0];
2742 } else {
2743 erp_valid = false;
50c4afb9 2744 }
7a5158ef
JB		 2745 changed |= ieee80211_handle_bss_capability(sdata,
2746 le16_to_cpu(mgmt->u.beacon.capab_info),
2747 erp_valid, erp_value);
f0706e82 2748
d3c990fb 2749
074d46d1 2750 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2751 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2752 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2753 bssid, true);
d3c990fb 2754
04b7b2ff
JB		 2755 if (elems.country_elem && elems.pwr_constr_elem &&
2756 mgmt->u.probe_resp.capab_info &
2757 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2758 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2759 elems.country_elem,
2760 elems.country_elem_len,
2761 elems.pwr_constr_elem);
3f2355cb 2762
471b3efd 2763 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2764}
2765
1fa57d01
JB		 2766void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2767 struct sk_buff *skb)
f0706e82 2768{
77fdaa12 2769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2770 struct ieee80211_rx_status *rx_status;
f0706e82 2771 struct ieee80211_mgmt *mgmt;
66e67e41 2772 struct cfg80211_bss *bss = NULL;
77fdaa12 2773 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2774 u16 fc;
2775
f0706e82
JB		 2776 rx_status = (struct ieee80211_rx_status *) skb->cb;
2777 mgmt = (struct ieee80211_mgmt *) skb->data;
2778 fc = le16_to_cpu(mgmt->frame_control);
2779
77fdaa12
JB		 2780 mutex_lock(&ifmgd->mtx);
2781
66e67e41
JB		 2782 switch (fc & IEEE80211_FCTL_STYPE) {
2783 case IEEE80211_STYPE_BEACON:
2784 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2785 break;
2786 case IEEE80211_STYPE_PROBE_RESP:
2787 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2788 break;
2789 case IEEE80211_STYPE_AUTH:
2790 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2791 break;
2792 case IEEE80211_STYPE_DEAUTH:
2793 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2794 break;
2795 case IEEE80211_STYPE_DISASSOC:
2796 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2797 break;
2798 case IEEE80211_STYPE_ASSOC_RESP:
2799 case IEEE80211_STYPE_REASSOC_RESP:
2800 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2801 break;
2802 case IEEE80211_STYPE_ACTION:
2803 switch (mgmt->u.action.category) {
2804 case WLAN_CATEGORY_SPECTRUM_MGMT:
2805 ieee80211_sta_process_chanswitch(sdata,
2806 &mgmt->u.action.u.chan_switch.sw_elem,
2807 (void *)ifmgd->associated->priv,
2808 rx_status->mactime);
77fdaa12 2809 break;
77fdaa12 2810 }
77fdaa12 2811 }
77fdaa12
JB		 2812 mutex_unlock(&ifmgd->mtx);
2813
66e67e41
JB		 2814 switch (rma) {
2815 case RX_MGMT_NONE:
2816 /* no action */
2817 break;
2818 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2819 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2820 break;
2821 case RX_MGMT_CFG80211_DISASSOC:
2822 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2823 break;
2824 case RX_MGMT_CFG80211_RX_AUTH:
2825 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2826 break;
2827 case RX_MGMT_CFG80211_RX_ASSOC:
2828 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2829 break;
2830 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2831 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2832 break;
2833 default:
2834 WARN(1, "unexpected: %d", rma);
b054b747 2835 }
f0706e82
JB		 2836}
2837
9c6bd790 2838static void ieee80211_sta_timer(unsigned long data)
f0706e82 2839{
60f8b39c
JB		 2840 struct ieee80211_sub_if_data *sdata =
2841 (struct ieee80211_sub_if_data *) data;
46900298 2842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2843 struct ieee80211_local *local = sdata->local;
f0706e82 2844
5bb644a0
JB		 2845 if (local->quiescing) {
2846 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2847 return;
2848 }
2849
64592c8f 2850 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2851}
2852
04ac3c0e 2853static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2854 u8 *bssid, u8 reason)
04ac3c0e
FF		 2855{
2856 struct ieee80211_local *local = sdata->local;
2857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2858 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2859
37ad3888
JB		 2860 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2861 false, frame_buf);
04ac3c0e 2862 mutex_unlock(&ifmgd->mtx);
37ad3888 2863
04ac3c0e
FF		 2864 /*
2865 * must be outside lock due to cfg80211,
2866 * but that's not a problem.
2867 */
6ae16775 2868 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2869
2870 mutex_lock(&local->mtx);
2871 ieee80211_recalc_idle(local);
2872 mutex_unlock(&local->mtx);
2873
04ac3c0e
FF		 2874 mutex_lock(&ifmgd->mtx);
2875}
2876
66e67e41
JB		 2877static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2878{
2879 struct ieee80211_local *local = sdata->local;
2880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2881 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 2882 u32 tx_flags = 0;
66e67e41
JB		 2883
2884 lockdep_assert_held(&ifmgd->mtx);
2885
2886 if (WARN_ON_ONCE(!auth_data))
2887 return -EINVAL;
2888
1672c0e3
JB		 2889 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2890 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2891 IEEE80211_TX_INTFL_MLME_CONN_TX;
2892
66e67e41
JB		 2893 auth_data->tries++;
2894
2895 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2896 sdata_info(sdata, "authentication with %pM timed out\n",
2897 auth_data->bss->bssid);
66e67e41
JB		 2898
2899 /*
2900 * Most likely AP is not in the range so remove the
2901 * bss struct for that AP.
2902 */
2903 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2904
2905 return -ETIMEDOUT;
2906 }
2907
a1845fc7
JB		 2908 drv_mgd_prepare_tx(local, sdata);
2909
66e67e41 2910 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2911 u16 trans = 1;
2912 u16 status = 0;
2913
bdcbd8e0
JB		 2914 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2915 auth_data->bss->bssid, auth_data->tries,
2916 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2917
2918 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2919
2920 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2921 trans = auth_data->sae_trans;
2922 status = auth_data->sae_status;
2923 auth_data->expected_transaction = trans;
2924 }
2925
2926 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2927 auth_data->data, auth_data->data_len,
66e67e41 2928 auth_data->bss->bssid,
1672c0e3
JB		 2929 auth_data->bss->bssid, NULL, 0, 0,
2930 tx_flags);
66e67e41
JB		 2931 } else {
2932 const u8 *ssidie;
2933
bdcbd8e0
JB		 2934 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2935 auth_data->bss->bssid, auth_data->tries,
2936 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2937
9caf0364 2938 rcu_read_lock();
66e67e41 2939 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2940 if (!ssidie) {
2941 rcu_read_unlock();
66e67e41 2942 return -EINVAL;
9caf0364 2943 }
66e67e41
JB		 2944 /*
2945 * Direct probe is sent to broadcast address as some APs
2946 * will not answer to direct packet in unassociated state.
2947 */
2948 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 2949 NULL, 0, (u32) -1, true, tx_flags,
55de908a 2950 auth_data->bss->channel, false);
9caf0364 2951 rcu_read_unlock();
66e67e41
JB		 2952 }
2953
1672c0e3
JB		 2954 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2955 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2956 run_again(ifmgd, auth_data->timeout);
2957 }
66e67e41
JB		 2958
2959 return 0;
2960}
2961
2962static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2963{
2964 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2965 struct ieee80211_local *local = sdata->local;
2966
2967 lockdep_assert_held(&sdata->u.mgd.mtx);
2968
66e67e41
JB		 2969 assoc_data->tries++;
2970 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2971 sdata_info(sdata, "association with %pM timed out\n",
2972 assoc_data->bss->bssid);
66e67e41
JB		 2973
2974 /*
2975 * Most likely AP is not in the range so remove the
2976 * bss struct for that AP.
2977 */
2978 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2979
2980 return -ETIMEDOUT;
2981 }
2982
bdcbd8e0
JB		 2983 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2984 assoc_data->bss->bssid, assoc_data->tries,
2985 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2986 ieee80211_send_assoc(sdata);
2987
1672c0e3
JB		 2988 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
2989 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2990 run_again(&sdata->u.mgd, assoc_data->timeout);
2991 }
66e67e41
JB		 2992
2993 return 0;
2994}
2995
1672c0e3
JB		 2996void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
2997 __le16 fc, bool acked)
2998{
2999 struct ieee80211_local *local = sdata->local;
3000
3001 sdata->u.mgd.status_fc = fc;
3002 sdata->u.mgd.status_acked = acked;
3003 sdata->u.mgd.status_received = true;
3004
3005 ieee80211_queue_work(&local->hw, &sdata->work);
3006}
3007
1fa57d01 3008void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3009{
9c6bd790 3010 struct ieee80211_local *local = sdata->local;
1fa57d01 3011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3012
77fdaa12
JB		 3013 mutex_lock(&ifmgd->mtx);
3014
1672c0e3
JB		 3015 if (ifmgd->status_received) {
3016 __le16 fc = ifmgd->status_fc;
3017 bool status_acked = ifmgd->status_acked;
3018
3019 ifmgd->status_received = false;
3020 if (ifmgd->auth_data &&
3021 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3022 if (status_acked) {
3023 ifmgd->auth_data->timeout =
3024 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3025 run_again(ifmgd, ifmgd->auth_data->timeout);
3026 } else {
3027 ifmgd->auth_data->timeout = jiffies - 1;
3028 }
3029 } else if (ifmgd->assoc_data &&
3030 (ieee80211_is_assoc_req(fc) ||
3031 ieee80211_is_reassoc_req(fc))) {
3032 if (status_acked) {
3033 ifmgd->assoc_data->timeout =
3034 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3035 run_again(ifmgd, ifmgd->assoc_data->timeout);
3036 } else {
3037 ifmgd->assoc_data->timeout = jiffies - 1;
3038 }
3039 }
3040 }
3041
66e67e41
JB		 3042 if (ifmgd->auth_data &&
3043 time_after(jiffies, ifmgd->auth_data->timeout)) {
3044 if (ifmgd->auth_data->done) {
3045 /*
3046 * ok ... we waited for assoc but userspace didn't,
3047 * so let's just kill the auth data
3048 */
3049 ieee80211_destroy_auth_data(sdata, false);
3050 } else if (ieee80211_probe_auth(sdata)) {
3051 u8 bssid[ETH_ALEN];
3052
3053 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3054
3055 ieee80211_destroy_auth_data(sdata, false);
3056
3057 mutex_unlock(&ifmgd->mtx);
3058 cfg80211_send_auth_timeout(sdata->dev, bssid);
3059 mutex_lock(&ifmgd->mtx);
3060 }
3061 } else if (ifmgd->auth_data)
3062 run_again(ifmgd, ifmgd->auth_data->timeout);
3063
3064 if (ifmgd->assoc_data &&
3065 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3066 if ((ifmgd->assoc_data->need_beacon &&
3067 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3068 ieee80211_do_assoc(sdata)) {
3069 u8 bssid[ETH_ALEN];
3070
3071 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3072
3073 ieee80211_destroy_assoc_data(sdata, false);
3074
3075 mutex_unlock(&ifmgd->mtx);
3076 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3077 mutex_lock(&ifmgd->mtx);
3078 }
3079 } else if (ifmgd->assoc_data)
3080 run_again(ifmgd, ifmgd->assoc_data->timeout);
3081
b291ba11
JB		 3082 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3083 IEEE80211_STA_CONNECTION_POLL) &&
3084 ifmgd->associated) {
a43abf29 3085 u8 bssid[ETH_ALEN];
72a8a3ed 3086 int max_tries;
a43abf29 3087
0c1ad2ca 3088 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3089
72a8a3ed 3090 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3091 max_tries = max_nullfunc_tries;
72a8a3ed 3092 else
180205bd 3093 max_tries = max_probe_tries;
72a8a3ed 3094
4e5ff376
FF		 3095 /* ACK received for nullfunc probing frame */
3096 if (!ifmgd->probe_send_count)
3097 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3098 else if (ifmgd->nullfunc_failed) {
3099 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3100 mlme_dbg(sdata,
3101 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3102 bssid, ifmgd->probe_send_count,
3103 max_tries);
04ac3c0e
FF		 3104 ieee80211_mgd_probe_ap_send(sdata);
3105 } else {
bdcbd8e0
JB		 3106 mlme_dbg(sdata,
3107 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3108 bssid);
95acac61
JB		 3109 ieee80211_sta_connection_lost(sdata, bssid,
3110 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 3111 }
3112 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3113 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3114 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3115 mlme_dbg(sdata,
3116 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3117 bssid, probe_wait_ms);
95acac61
JB		 3118 ieee80211_sta_connection_lost(sdata, bssid,
3119 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 3120 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3121 mlme_dbg(sdata,
3122 "No probe response from AP %pM after %dms, try %d/%i\n",
3123 bssid, probe_wait_ms,
3124 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3125 ieee80211_mgd_probe_ap_send(sdata);
3126 } else {
b291ba11
JB		 3127 /*
3128 * We actually lost the connection ... or did we?
3129 * Let's make sure!
3130 */
b38afa87
BG		 3131 wiphy_debug(local->hw.wiphy,
3132 "%s: No probe response from AP %pM"
3133 " after %dms, disconnecting.\n",
3134 sdata->name,
180205bd 3135 bssid, probe_wait_ms);
04ac3c0e 3136
95acac61
JB		 3137 ieee80211_sta_connection_lost(sdata, bssid,
3138 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 3139 }
3140 }
3141
77fdaa12 3142 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 3143
3144 mutex_lock(&local->mtx);
3145 ieee80211_recalc_idle(local);
3146 mutex_unlock(&local->mtx);
f0706e82
JB		 3147}
3148
b291ba11
JB		 3149static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3150{
3151 struct ieee80211_sub_if_data *sdata =
3152 (struct ieee80211_sub_if_data *) data;
3153 struct ieee80211_local *local = sdata->local;
3154
3155 if (local->quiescing)
3156 return;
3157
1e4dcd01
JO		 3158 ieee80211_queue_work(&sdata->local->hw,
3159 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3160}
3161
3162static void ieee80211_sta_conn_mon_timer(unsigned long data)
3163{
3164 struct ieee80211_sub_if_data *sdata =
3165 (struct ieee80211_sub_if_data *) data;
3166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3167 struct ieee80211_local *local = sdata->local;
3168
3169 if (local->quiescing)
3170 return;
3171
42935eca 3172 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3173}
3174
3175static void ieee80211_sta_monitor_work(struct work_struct *work)
3176{
3177 struct ieee80211_sub_if_data *sdata =
3178 container_of(work, struct ieee80211_sub_if_data,
3179 u.mgd.monitor_work);
3180
3181 ieee80211_mgd_probe_ap(sdata, false);
3182}
3183
9c6bd790
JB		 3184static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3185{
494f1fe5
EP		 3186 u32 flags;
3187
ad935687 3188 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3189 __ieee80211_stop_poll(sdata);
ad935687 3190
b291ba11 3191 /* let's probe the connection once */
494f1fe5
EP		 3192 flags = sdata->local->hw.flags;
3193 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3194 ieee80211_queue_work(&sdata->local->hw,
3195 &sdata->u.mgd.monitor_work);
b291ba11 3196 /* and do all the other regular work too */
64592c8f 3197 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3198 }
9c6bd790 3199}
f0706e82 3200
5bb644a0
JB		 3201#ifdef CONFIG_PM
3202void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3203{
3204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3205
3206 /*
3207 * we need to use atomic bitops for the running bits
3208 * only because both timers might fire at the same
3209 * time -- the code here is properly synchronised.
3210 */
3211
d1f5b7a3
JB		 3212 cancel_work_sync(&ifmgd->request_smps_work);
3213
0ecfe806 3214 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3215 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3216 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3217 if (del_timer_sync(&ifmgd->timer))
3218 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3219
3220 cancel_work_sync(&ifmgd->chswitch_work);
3221 if (del_timer_sync(&ifmgd->chswitch_timer))
3222 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3223
b291ba11
JB		 3224 /* these will just be re-established on connection */
3225 del_timer_sync(&ifmgd->conn_mon_timer);
3226 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3227}
3228
3229void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3230{
3231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3232
782d2673
JB		 3233 mutex_lock(&ifmgd->mtx);
3234 if (!ifmgd->associated) {
3235 mutex_unlock(&ifmgd->mtx);
676b58c2 3236 return;
782d2673 3237 }
676b58c2 3238
95acac61
JB		 3239 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3240 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3241 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3242 ieee80211_sta_connection_lost(sdata,
3243 ifmgd->associated->bssid,
3244 WLAN_REASON_UNSPECIFIED);
95acac61 3245 mutex_unlock(&ifmgd->mtx);
782d2673 3246 return;
95acac61 3247 }
782d2673 3248 mutex_unlock(&ifmgd->mtx);
95acac61 3249
5bb644a0
JB		 3250 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3251 add_timer(&ifmgd->timer);
3252 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3253 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3254 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3255
3256 mutex_lock(&sdata->local->mtx);
46090979 3257 ieee80211_restart_sta_timer(sdata);
925e64c3 3258 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3259}
3260#endif
3261
9c6bd790
JB		 3262/* interface setup */
3263void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3264{
46900298 3265 struct ieee80211_if_managed *ifmgd;
988c0f72 3266
46900298 3267 ifmgd = &sdata->u.mgd;
b291ba11 3268 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3269 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3270 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3271 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3272 INIT_WORK(&ifmgd->csa_connection_drop_work,
3273 ieee80211_csa_connection_drop_work);
d1f5b7a3 3274 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3275 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3276 (unsigned long) sdata);
b291ba11
JB		 3277 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3278 (unsigned long) sdata);
3279 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3280 (unsigned long) sdata);
46900298 3281 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3282 (unsigned long) sdata);
9c6bd790 3283
ab1faead 3284 ifmgd->flags = 0;
1478acb3 3285 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3286 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3287 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3288
77fdaa12 3289 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3290
3291 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3292 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3293 else
3294 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3295}
3296
77fdaa12
JB		 3297/* scan finished notification */
3298void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3299{
31ee67a1 3300 struct ieee80211_sub_if_data *sdata;
60f8b39c 3301
77fdaa12
JB		 3302 /* Restart STA timers */
3303 rcu_read_lock();
3304 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3305 ieee80211_restart_sta_timer(sdata);
3306 rcu_read_unlock();
3307}
60f8b39c 3308
77fdaa12
JB		 3309int ieee80211_max_network_latency(struct notifier_block *nb,
3310 unsigned long data, void *dummy)
3311{
3312 s32 latency_usec = (s32) data;
3313 struct ieee80211_local *local =
3314 container_of(nb, struct ieee80211_local,
3315 network_latency_notifier);
1fa6f4af 3316
77fdaa12
JB		 3317 mutex_lock(&local->iflist_mtx);
3318 ieee80211_recalc_ps(local, latency_usec);
3319 mutex_unlock(&local->iflist_mtx);
dfe67012 3320
77fdaa12 3321 return 0;
9c6bd790
JB		 3322}
3323
f2d9d270
JB		 3324static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3325{
3326 u32 ret;
3327 int tmp;
3328
3329 switch (c->width) {
3330 case NL80211_CHAN_WIDTH_20:
3331 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3332 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3333 break;
3334 case NL80211_CHAN_WIDTH_40:
3335 c->width = NL80211_CHAN_WIDTH_20;
3336 c->center_freq1 = c->chan->center_freq;
3337 ret = IEEE80211_STA_DISABLE_40MHZ |
3338 IEEE80211_STA_DISABLE_VHT;
3339 break;
3340 case NL80211_CHAN_WIDTH_80:
3341 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3342 /* n_P40 */
3343 tmp /= 2;
3344 /* freq_P40 */
3345 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3346 c->width = NL80211_CHAN_WIDTH_40;
3347 ret = IEEE80211_STA_DISABLE_VHT;
3348 break;
3349 case NL80211_CHAN_WIDTH_80P80:
3350 c->center_freq2 = 0;
3351 c->width = NL80211_CHAN_WIDTH_80;
3352 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3353 IEEE80211_STA_DISABLE_160MHZ;
3354 break;
3355 case NL80211_CHAN_WIDTH_160:
3356 /* n_P20 */
3357 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3358 /* n_P80 */
3359 tmp /= 4;
3360 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3361 c->width = NL80211_CHAN_WIDTH_80;
3362 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3363 IEEE80211_STA_DISABLE_160MHZ;
3364 break;
3365 default:
3366 case NL80211_CHAN_WIDTH_20_NOHT:
3367 WARN_ON_ONCE(1);
3368 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3369 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3370 break;
3371 }
3372
3373 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3374
3375 return ret;
3376}
3377
3378static u32
3379ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3380 struct ieee80211_supported_band *sband,
3381 struct ieee80211_channel *channel,
3382 const struct ieee80211_ht_operation *ht_oper,
3383 const struct ieee80211_vht_operation *vht_oper,
3384 struct cfg80211_chan_def *chandef)
3385{
3386 struct cfg80211_chan_def vht_chandef;
3387 u32 ht_cfreq, ret;
3388
3389 chandef->chan = channel;
3390 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3391 chandef->center_freq1 = channel->center_freq;
3392 chandef->center_freq2 = 0;
3393
3394 if (!ht_oper || !sband->ht_cap.ht_supported) {
3395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3396 goto out;
3397 }
3398
3399 chandef->width = NL80211_CHAN_WIDTH_20;
3400
3401 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3402 channel->band);
3403 /* check that channel matches the right operating channel */
3404 if (channel->center_freq != ht_cfreq) {
3405 /*
3406 * It's possible that some APs are confused here;
3407 * Netgear WNDR3700 sometimes reports 4 higher than
3408 * the actual channel in association responses, but
3409 * since we look at probe response/beacon data here
3410 * it should be OK.
3411 */
3412 sdata_info(sdata,
3413 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3414 channel->center_freq, ht_cfreq,
3415 ht_oper->primary_chan, channel->band);
3416 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3417 goto out;
3418 }
3419
3420 /* check 40 MHz support, if we have it */
3421 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3422 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3423 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3424 chandef->width = NL80211_CHAN_WIDTH_40;
3425 chandef->center_freq1 += 10;
3426 break;
3427 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3428 chandef->width = NL80211_CHAN_WIDTH_40;
3429 chandef->center_freq1 -= 10;
3430 break;
3431 }
3432 } else {
3433 /* 40 MHz (and 80 MHz) must be supported for VHT */
3434 ret = IEEE80211_STA_DISABLE_VHT;
3435 goto out;
3436 }
3437
3438 if (!vht_oper || !sband->vht_cap.vht_supported) {
3439 ret = IEEE80211_STA_DISABLE_VHT;
3440 goto out;
3441 }
3442
3443 vht_chandef.chan = channel;
3444 vht_chandef.center_freq1 =
3445 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3446 channel->band);
3447 vht_chandef.center_freq2 = 0;
3448
3449 if (vht_oper->center_freq_seg2_idx)
3450 vht_chandef.center_freq2 =
3451 ieee80211_channel_to_frequency(
3452 vht_oper->center_freq_seg2_idx,
3453 channel->band);
3454
3455 switch (vht_oper->chan_width) {
3456 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3457 vht_chandef.width = chandef->width;
3458 break;
3459 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3460 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3461 break;
3462 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3463 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3464 break;
3465 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3466 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3467 break;
3468 default:
3469 sdata_info(sdata,
3470 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3471 vht_oper->chan_width);
3472 ret = IEEE80211_STA_DISABLE_VHT;
3473 goto out;
3474 }
3475
3476 if (!cfg80211_chandef_valid(&vht_chandef)) {
3477 sdata_info(sdata,
3478 "AP VHT information is invalid, disable VHT\n");
3479 ret = IEEE80211_STA_DISABLE_VHT;
3480 goto out;
3481 }
3482
3483 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3484 ret = 0;
3485 goto out;
3486 }
3487
3488 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3489 sdata_info(sdata,
3490 "AP VHT information doesn't match HT, disable VHT\n");
3491 ret = IEEE80211_STA_DISABLE_VHT;
3492 goto out;
3493 }
3494
3495 *chandef = vht_chandef;
3496
3497 ret = 0;
3498
3499 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3500 IEEE80211_CHAN_DISABLED)) {
3501 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3502 ret = IEEE80211_STA_DISABLE_HT |
3503 IEEE80211_STA_DISABLE_VHT;
3504 goto out;
3505 }
3506
3507 ret = chandef_downgrade(chandef);
3508 }
3509
3510 if (chandef->width != vht_chandef.width)
3511 sdata_info(sdata,
3512 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3513
3514out:
3515 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3516 return ret;
3517}
3518
3519static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3520 struct cfg80211_bss *cbss)
3521{
3522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3523 const u8 *ht_cap_ie, *vht_cap_ie;
3524 const struct ieee80211_ht_cap *ht_cap;
3525 const struct ieee80211_vht_cap *vht_cap;
3526 u8 chains = 1;
3527
3528 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3529 return chains;
3530
9caf0364 3531 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3532 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3533 ht_cap = (void *)(ht_cap_ie + 2);
3534 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3535 /*
3536 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3537 * "Tx Unequal Modulation Supported" fields.
3538 */
3539 }
3540
3541 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3542 return chains;
3543
9caf0364 3544 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3545 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3546 u8 nss;
3547 u16 tx_mcs_map;
3548
3549 vht_cap = (void *)(vht_cap_ie + 2);
3550 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3551 for (nss = 8; nss > 0; nss--) {
3552 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3553 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3554 break;
3555 }
3556 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3557 chains = max(chains, nss);
3558 }
3559
3560 return chains;
3561}
3562
b17166a7
JB		 3563static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3564 struct cfg80211_bss *cbss)
a1cf775d
JB		 3565{
3566 struct ieee80211_local *local = sdata->local;
3567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3568 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3569 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3570 struct ieee80211_supported_band *sband;
4bf88530 3571 struct cfg80211_chan_def chandef;
f2d9d270 3572 int ret;
a1cf775d 3573
24398e39
JB		 3574 sband = local->hw.wiphy->bands[cbss->channel->band];
3575
f2d9d270
JB		 3576 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3577 IEEE80211_STA_DISABLE_80P80MHZ |
3578 IEEE80211_STA_DISABLE_160MHZ);
3579
9caf0364
JB		 3580 rcu_read_lock();
3581
f2d9d270
JB		 3582 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3583 sband->ht_cap.ht_supported) {
3584 const u8 *ht_oper_ie;
24398e39 3585
9caf0364 3586 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3587 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3588 ht_oper = (void *)(ht_oper_ie + 2);
3589 }
3590
f2d9d270
JB		 3591 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3592 sband->vht_cap.vht_supported) {
3593 const u8 *vht_oper_ie;
3594
9caf0364
JB		 3595 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3596 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3597 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3598 vht_oper = (void *)(vht_oper_ie + 2);
3599 if (vht_oper && !ht_oper) {
3600 vht_oper = NULL;
bdcbd8e0 3601 sdata_info(sdata,
f2d9d270
JB		 3602 "AP advertised VHT without HT, disabling both\n");
3603 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3604 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39
JB		 3605 }
3606 }
3607
f2d9d270
JB		 3608 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3609 cbss->channel,
3610 ht_oper, vht_oper,
3611 &chandef);
04ecd257 3612
f2d9d270
JB		 3613 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3614 local->rx_chains);
24398e39 3615
9caf0364
JB		 3616 rcu_read_unlock();
3617
04ecd257
JB		 3618 /* will change later if needed */
3619 sdata->smps_mode = IEEE80211_SMPS_OFF;
3620
f2d9d270
JB		 3621 /*
3622 * If this fails (possibly due to channel context sharing
3623 * on incompatible channels, e.g. 80+80 and 160 sharing the
3624 * same control channel) try to use a smaller bandwidth.
3625 */
3626 ret = ieee80211_vif_use_channel(sdata, &chandef,
3627 IEEE80211_CHANCTX_SHARED);
3628 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3629 ifmgd->flags |= chandef_downgrade(&chandef);
3630 return ret;
b17166a7
JB		 3631}
3632
3633static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3634 struct cfg80211_bss *cbss, bool assoc)
3635{
3636 struct ieee80211_local *local = sdata->local;
3637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3638 struct ieee80211_bss *bss = (void *)cbss->priv;
3639 struct sta_info *new_sta = NULL;
3640 bool have_sta = false;
3641 int err;
3642
3643 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3644 return -EINVAL;
3645
3646 if (assoc) {
3647 rcu_read_lock();
3648 have_sta = sta_info_get(sdata, cbss->bssid);
3649 rcu_read_unlock();
3650 }
3651
3652 if (!have_sta) {
3653 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3654 if (!new_sta)
3655 return -ENOMEM;
3656 }
3657
3658 mutex_lock(&local->mtx);
3659 ieee80211_recalc_idle(sdata->local);
3660 mutex_unlock(&local->mtx);
3661
13e0c8e3 3662 if (new_sta) {
5d6a1b06
JB		 3663 u32 rates = 0, basic_rates = 0;
3664 bool have_higher_than_11mbit;
3665 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3666 struct ieee80211_supported_band *sband;
3667
3668 sband = local->hw.wiphy->bands[cbss->channel->band];
3669
3670 err = ieee80211_prep_channel(sdata, cbss);
3671 if (err) {
3672 sta_info_free(local, new_sta);
3673 return err;
3674 }
5d6a1b06 3675
5d6a1b06
JB		 3676 ieee80211_get_rates(sband, bss->supp_rates,
3677 bss->supp_rates_len,
3678 &rates, &basic_rates,
3679 &have_higher_than_11mbit,
3680 &min_rate, &min_rate_index);
3681
3682 /*
3683 * This used to be a workaround for basic rates missing
3684 * in the association response frame. Now that we no
3685 * longer use the basic rates from there, it probably
3686 * doesn't happen any more, but keep the workaround so
3687 * in case some *other* APs are buggy in different ways
3688 * we can connect -- with a warning.
3689 */
3690 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3691 sdata_info(sdata,
3692 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3693 basic_rates = BIT(min_rate_index);
3694 }
3695
13e0c8e3 3696 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3697 sdata->vif.bss_conf.basic_rates = basic_rates;
3698
3699 /* cf. IEEE 802.11 9.2.12 */
55de908a 3700 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3701 have_higher_than_11mbit)
3702 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3703 else
3704 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3705
3706 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3707
8c358bcd
JB		 3708 /* set timing information */
3709 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3710 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3711 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3712
3713 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3714 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3715 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3716 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3717
3718 if (assoc)
13e0c8e3 3719 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3720
13e0c8e3
JB		 3721 err = sta_info_insert(new_sta);
3722 new_sta = NULL;
a1cf775d 3723 if (err) {
bdcbd8e0
JB		 3724 sdata_info(sdata,
3725 "failed to insert STA entry for the AP (error %d)\n",
3726 err);
a1cf775d
JB		 3727 return err;
3728 }
3729 } else
b203ca39 3730 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3731
3732 return 0;
3733}
3734
77fdaa12
JB		 3735/* config hooks */
3736int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3737 struct cfg80211_auth_request *req)
9c6bd790 3738{
66e67e41
JB		 3739 struct ieee80211_local *local = sdata->local;
3740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3741 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3742 u16 auth_alg;
66e67e41
JB		 3743 int err;
3744
3745 /* prepare auth data structure */
9c6bd790 3746
77fdaa12
JB		 3747 switch (req->auth_type) {
3748 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3749 auth_alg = WLAN_AUTH_OPEN;
3750 break;
3751 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3752 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3753 return -EOPNOTSUPP;
77fdaa12
JB		 3754 auth_alg = WLAN_AUTH_SHARED_KEY;
3755 break;
3756 case NL80211_AUTHTYPE_FT:
3757 auth_alg = WLAN_AUTH_FT;
3758 break;
3759 case NL80211_AUTHTYPE_NETWORK_EAP:
3760 auth_alg = WLAN_AUTH_LEAP;
3761 break;
6b8ece3a
JM		 3762 case NL80211_AUTHTYPE_SAE:
3763 auth_alg = WLAN_AUTH_SAE;
3764 break;
77fdaa12
JB		 3765 default:
3766 return -EOPNOTSUPP;
60f8b39c 3767 }
77fdaa12 3768
6b8ece3a
JM		 3769 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3770 req->ie_len, GFP_KERNEL);
66e67e41 3771 if (!auth_data)
9c6bd790 3772 return -ENOMEM;
77fdaa12 3773
66e67e41 3774 auth_data->bss = req->bss;
77fdaa12 3775
6b8ece3a
JM		 3776 if (req->sae_data_len >= 4) {
3777 __le16 *pos = (__le16 *) req->sae_data;
3778 auth_data->sae_trans = le16_to_cpu(pos[0]);
3779 auth_data->sae_status = le16_to_cpu(pos[1]);
3780 memcpy(auth_data->data, req->sae_data + 4,
3781 req->sae_data_len - 4);
3782 auth_data->data_len += req->sae_data_len - 4;
3783 }
3784
77fdaa12 3785 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3786 memcpy(&auth_data->data[auth_data->data_len],
3787 req->ie, req->ie_len);
3788 auth_data->data_len += req->ie_len;
9c6bd790 3789 }
77fdaa12 3790
fffd0934 3791 if (req->key && req->key_len) {
66e67e41
JB		 3792 auth_data->key_len = req->key_len;
3793 auth_data->key_idx = req->key_idx;
3794 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3795 }
3796
66e67e41 3797 auth_data->algorithm = auth_alg;
60f8b39c 3798
66e67e41 3799 /* try to authenticate/probe */
2a33bee2 3800
66e67e41 3801 mutex_lock(&ifmgd->mtx);
2a33bee2 3802
66e67e41
JB		 3803 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3804 ifmgd->assoc_data) {
3805 err = -EBUSY;
3806 goto err_free;
2a33bee2
GE		 3807 }
3808
66e67e41
JB		 3809 if (ifmgd->auth_data)
3810 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3811
66e67e41
JB		 3812 /* prep auth_data so we don't go into idle on disassoc */
3813 ifmgd->auth_data = auth_data;
af6b6374 3814
66e67e41 3815 if (ifmgd->associated)
37ad3888 3816 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3817
bdcbd8e0 3818 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3819
a1cf775d
JB		 3820 err = ieee80211_prep_connection(sdata, req->bss, false);
3821 if (err)
66e67e41 3822 goto err_clear;
af6b6374 3823
66e67e41
JB		 3824 err = ieee80211_probe_auth(sdata);
3825 if (err) {
66e67e41
JB		 3826 sta_info_destroy_addr(sdata, req->bss->bssid);
3827 goto err_clear;
3828 }
3829
3830 /* hold our own reference */
3831 cfg80211_ref_bss(auth_data->bss);
3832 err = 0;
3833 goto out_unlock;
3834
3835 err_clear:
3d2abdfd
EP		 3836 memset(ifmgd->bssid, 0, ETH_ALEN);
3837 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3838 ifmgd->auth_data = NULL;
3839 err_free:
3840 kfree(auth_data);
3841 out_unlock:
3842 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3843
66e67e41 3844 return err;
af6b6374
JB		 3845}
3846
77fdaa12
JB		 3847int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3848 struct cfg80211_assoc_request *req)
f0706e82 3849{
66e67e41 3850 struct ieee80211_local *local = sdata->local;
77fdaa12 3851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3852 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3853 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3854 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3855 struct ieee80211_supported_band *sband;
b08fbbd8 3856 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3857 int i, err;
f0706e82 3858
66e67e41
JB		 3859 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3860 if (!assoc_data)
3861 return -ENOMEM;
3862
9caf0364
JB		 3863 rcu_read_lock();
3864 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3865 if (!ssidie) {
3866 rcu_read_unlock();
3867 kfree(assoc_data);
3868 return -EINVAL;
3869 }
3870 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3871 assoc_data->ssid_len = ssidie[1];
3872 rcu_read_unlock();
3873
77fdaa12 3874 mutex_lock(&ifmgd->mtx);
9c87ba67 3875
66e67e41 3876 if (ifmgd->associated)
37ad3888 3877 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3878
3879 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3880 err = -EBUSY;
3881 goto err_free;
af6b6374 3882 }
77fdaa12 3883
66e67e41
JB		 3884 if (ifmgd->assoc_data) {
3885 err = -EBUSY;
3886 goto err_free;
3887 }
77fdaa12 3888
66e67e41
JB		 3889 if (ifmgd->auth_data) {
3890 bool match;
3891
3892 /* keep sta info, bssid if matching */
b203ca39 3893 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3894 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3895 }
3896
66e67e41 3897 /* prepare assoc data */
19c3b830 3898
d8ec4433
JO		 3899 ifmgd->beacon_crc_valid = false;
3900
de5036aa
JB		 3901 /*
3902 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3903 * We still associate in non-HT mode (11a/b/g) if any one of these
3904 * ciphers is configured as pairwise.
3905 * We can set this to true for non-11n hardware, that'll be checked
3906 * separately along with the peer capabilities.
3907 */
1c4cb928 3908 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3909 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3910 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3911 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3912 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3913 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3914 netdev_info(sdata->dev,
d545daba 3915 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3916 }
3917 }
77fdaa12 3918
d545daba 3919 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3920 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3921 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3922 }
ef96a842 3923
4e74bfdb
JB		 3924 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3925 sband = local->hw.wiphy->bands[req->bss->channel->band];
3926 if (!sband->ht_cap.ht_supported ||
1c4cb928 3927 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3928 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3929 if (!bss->wmm_used)
3930 netdev_info(sdata->dev,
3931 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3932 }
4e74bfdb 3933
d545daba
MP		 3934 /* disable VHT if we don't support it or the AP doesn't use WMM */
3935 if (!sband->vht_cap.vht_supported ||
3936 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3937 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3938 if (!bss->wmm_used)
3939 netdev_info(sdata->dev,
3940 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3941 }
3942
ef96a842
BG		 3943 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3944 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3945 sizeof(ifmgd->ht_capa_mask));
3946
77fdaa12 3947 if (req->ie && req->ie_len) {
66e67e41
JB		 3948 memcpy(assoc_data->ie, req->ie, req->ie_len);
3949 assoc_data->ie_len = req->ie_len;
3950 }
f679f65d 3951
66e67e41 3952 assoc_data->bss = req->bss;
f679f65d 3953
af6b6374
JB		 3954 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3955 if (ifmgd->powersave)
04ecd257 3956 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3957 else
04ecd257 3958 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3959 } else
04ecd257 3960 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3961
66e67e41 3962 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3963 assoc_data->wmm = bss->wmm_used &&
3964 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3965 assoc_data->supp_rates = bss->supp_rates;
3966 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 3967
9caf0364 3968 rcu_read_lock();
9dde6423
JB		 3969 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3970 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3971 assoc_data->ap_ht_param =
3972 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3973 else
a8243b72 3974 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 3975 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
3976 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
3977 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
3978 sizeof(struct ieee80211_vht_cap));
3979 else
3980 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 3981 rcu_read_unlock();
63f170e0 3982
ab13315a
KV		 3983 if (bss->wmm_used && bss->uapsd_supported &&
3984 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3985 assoc_data->uapsd = true;
ab13315a
KV		 3986 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3987 } else {
76f0303d 3988 assoc_data->uapsd = false;
ab13315a
KV		 3989 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3990 }
3991
77fdaa12 3992 if (req->prev_bssid)
66e67e41 3993 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3994
3995 if (req->use_mfp) {
3996 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3997 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3998 } else {
3999 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4000 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4001 }
4002
4003 if (req->crypto.control_port)
4004 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4005 else
4006 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4007
a621fa4d
JB		 4008 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4009 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4010
66e67e41
JB		 4011 /* kick off associate process */
4012
4013 ifmgd->assoc_data = assoc_data;
826262c3 4014 ifmgd->dtim_period = 0;
66e67e41 4015
a1cf775d
JB		 4016 err = ieee80211_prep_connection(sdata, req->bss, true);
4017 if (err)
4018 goto err_clear;
66e67e41 4019
c65dd147
EG		 4020 rcu_read_lock();
4021 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4022
c65dd147
EG		 4023 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4024 !beacon_ies) {
4025 /*
4026 * Wait up to one beacon interval ...
4027 * should this be more if we miss one?
4028 */
4029 sdata_info(sdata, "waiting for beacon from %pM\n",
4030 ifmgd->bssid);
4031 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4032 assoc_data->need_beacon = true;
4033 } else if (beacon_ies) {
4034 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4035 beacon_ies->data,
4036 beacon_ies->len);
4037 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4038 const struct ieee80211_tim_ie *tim;
4039 tim = (void *)(tim_ie + 2);
4040 ifmgd->dtim_period = tim->dtim_period;
826262c3 4041 }
66e67e41 4042 assoc_data->have_beacon = true;
66e67e41 4043 assoc_data->timeout = jiffies;
c65dd147
EG		 4044 } else {
4045 assoc_data->timeout = jiffies;
66e67e41 4046 }
c65dd147
EG		 4047 rcu_read_unlock();
4048
66e67e41
JB		 4049 run_again(ifmgd, assoc_data->timeout);
4050
fcff4f10
PS		 4051 if (bss->corrupt_data) {
4052 char *corrupt_type = "data";
4053 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4054 if (bss->corrupt_data &
4055 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4056 corrupt_type = "beacon and probe response";
4057 else
4058 corrupt_type = "beacon";
4059 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4060 corrupt_type = "probe response";
bdcbd8e0
JB		 4061 sdata_info(sdata, "associating with AP with corrupt %s\n",
4062 corrupt_type);
fcff4f10
PS		 4063 }
4064
66e67e41
JB		 4065 err = 0;
4066 goto out;
4067 err_clear:
3d2abdfd
EP		 4068 memset(ifmgd->bssid, 0, ETH_ALEN);
4069 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4070 ifmgd->assoc_data = NULL;
4071 err_free:
4072 kfree(assoc_data);
4073 out:
4074 mutex_unlock(&ifmgd->mtx);
4075
4076 return err;
f0706e82
JB		 4077}
4078
77fdaa12 4079int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4080 struct cfg80211_deauth_request *req)
f0706e82 4081{
46900298 4082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4083 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4084 bool tx = !req->local_state_change;
86552017 4085 bool sent_frame = false;
f0706e82 4086
77fdaa12
JB		 4087 mutex_lock(&ifmgd->mtx);
4088
bdcbd8e0
JB		 4089 sdata_info(sdata,
4090 "deauthenticating from %pM by local choice (reason=%d)\n",
4091 req->bssid, req->reason_code);
0ff71613 4092
86552017 4093 if (ifmgd->auth_data) {
8c7d857c 4094 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4095 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4096 IEEE80211_STYPE_DEAUTH,
6863255b 4097 req->reason_code, tx,
37ad3888 4098 frame_buf);
86552017
JB		 4099 ieee80211_destroy_auth_data(sdata, false);
4100 mutex_unlock(&ifmgd->mtx);
4101
4102 sent_frame = tx;
4103 goto out;
8c7d857c
EG		 4104 }
4105
86552017
JB		 4106 if (ifmgd->associated &&
4107 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4108 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4109 req->reason_code, tx, frame_buf);
4110 sent_frame = tx;
4111 }
37ad3888
JB		 4112 mutex_unlock(&ifmgd->mtx);
4113
86552017 4114 out:
7da7cc1d 4115 mutex_lock(&sdata->local->mtx);
bc83b681 4116 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4117 mutex_unlock(&sdata->local->mtx);
bc83b681 4118
86552017
JB		 4119 if (sent_frame)
4120 __cfg80211_send_deauth(sdata->dev, frame_buf,
4121 IEEE80211_DEAUTH_FRAME_LEN);
4122
f0706e82
JB		 4123 return 0;
4124}
84363e6e 4125
77fdaa12 4126int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4127 struct cfg80211_disassoc_request *req)
9c6bd790 4128{
77fdaa12 4129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4130 u8 bssid[ETH_ALEN];
6ae16775 4131 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4132
77fdaa12 4133 mutex_lock(&ifmgd->mtx);
10f644a4 4134
8d8b261a
JB		 4135 /*
4136 * cfg80211 should catch this ... but it's racy since
4137 * we can receive a disassoc frame, process it, hand it
4138 * to cfg80211 while that's in a locked section already
4139 * trying to tell us that the user wants to disconnect.
4140 */
0c1ad2ca 4141 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4142 mutex_unlock(&ifmgd->mtx);
4143 return -ENOLINK;
4144 }
4145
bdcbd8e0
JB		 4146 sdata_info(sdata,
4147 "disassociating from %pM by local choice (reason=%d)\n",
4148 req->bss->bssid, req->reason_code);
0ff71613 4149
e69e95db 4150 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4151 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4152 req->reason_code, !req->local_state_change,
4153 frame_buf);
77fdaa12 4154 mutex_unlock(&ifmgd->mtx);
10f644a4 4155
6ae16775
AQ		 4156 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4157 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4158
7da7cc1d 4159 mutex_lock(&sdata->local->mtx);
bc83b681 4160 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4161 mutex_unlock(&sdata->local->mtx);
bc83b681 4162
10f644a4
JB		 4163 return 0;
4164}
026331c4 4165
afa762f6 4166void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4167{
4168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4169
4170 mutex_lock(&ifmgd->mtx);
4171 if (ifmgd->assoc_data)
4172 ieee80211_destroy_assoc_data(sdata, false);
4173 if (ifmgd->auth_data)
4174 ieee80211_destroy_auth_data(sdata, false);
4175 del_timer_sync(&ifmgd->timer);
4176 mutex_unlock(&ifmgd->mtx);
4177}
4178
a97c13c3
JO		 4179void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4180 enum nl80211_cqm_rssi_threshold_event rssi_event,
4181 gfp_t gfp)
4182{
4183 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4184
b5878a2d
JB		 4185 trace_api_cqm_rssi_notify(sdata, rssi_event);
4186
a97c13c3
JO		 4187 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4188}
4189EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
This page took 0.866358 seconds and 5 git commands to generate.