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Merge branch 'for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
[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
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
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
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
91a0099c 213 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 215
64f68e5d
JB		 216 if (disable_40)
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
218 else
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 220
64f68e5d 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
074d46d1 261 struct sk_buff *skb, const u8 *ht_oper_ie,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
074d46d1 266 struct ieee80211_ht_operation *ht_oper;
66e67e41
JB		 267 u8 *pos;
268 u32 flags = channel->flags;
269 u16 cap;
270 struct ieee80211_sta_ht_cap ht_cap;
271
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273
074d46d1 274 if (!ht_oper_ie)
66e67e41
JB		 275 return;
276
074d46d1 277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
66e67e41
JB		 278 return;
279
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
282
074d46d1 283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
66e67e41
JB		 284
285 /* determine capability flags */
286 cap = ht_cap.cap;
287
074d46d1 288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 }
300 break;
301 }
302
24398e39
JB		 303 /*
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
307 */
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
311 }
312
66e67e41
JB		 313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
315 switch (smps) {
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
318 WARN_ON(1);
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
322 break;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 }
332
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
336}
337
338static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
339{
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
343 struct sk_buff *skb;
344 struct ieee80211_mgmt *mgmt;
345 u8 *pos, qos_info;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
348 u16 capab;
349 struct ieee80211_supported_band *sband;
350 u32 rates = 0;
66e67e41
JB		 351
352 lockdep_assert_held(&ifmgd->mtx);
353
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
355
356 if (assoc_data->supp_rates_len) {
357 /*
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
361 * b-only mode)...
362 */
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
365 sband, &rates);
366 } else {
367 /*
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
371 */
372 rates = ~0;
373 rates_len = sband->n_bitrates;
374 }
375
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
384 9, /* WMM */
385 GFP_KERNEL);
386 if (!skb)
387 return;
388
389 skb_reserve(skb, local->hw.extra_tx_headroom);
390
391 capab = WLAN_CAPABILITY_ESS;
392
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
398 }
399
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
402
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
406
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
408 memset(mgmt, 0, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
412
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
414 skb_put(skb, 10);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
421 ETH_ALEN);
422 } else {
423 skb_put(skb, 4);
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
429 }
430
431 /* SSID */
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
436
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
440 supp_rates_len = 8;
441
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
445
446 count = 0;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
451 if (++count == 8)
452 break;
453 }
454 }
455
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
460
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
465 }
466 }
467 }
468
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
473 *pos++ = 2;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
476
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
486 }
487 }
488
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
492 WLAN_EID_SSID,
493 WLAN_EID_SUPP_RATES,
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
497 WLAN_EID_RSN,
498 WLAN_EID_QOS_CAPA,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
502 };
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
505 offset);
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
508 offset = noffset;
509 }
510
4e74bfdb 511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
074d46d1 512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
66e67e41
JB		 513 sband, local->oper_channel, ifmgd->ap_smps);
514
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
518 assoc_data->ie_len,
519 offset);
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
522 offset = noffset;
523 }
524
76f0303d
JB		 525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
dc41e4d4
EP		 527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
530 } else {
531 qos_info = 0;
532 }
533
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
538 *pos++ = 0x50;
539 *pos++ = 0xf2;
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
543 *pos++ = qos_info;
544 }
545
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
551 }
552
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
555}
556
ef422bc0 557static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 558 const u8 *bssid, u16 stype,
5fef7dbc
JB		 559 u16 reason, bool send_frame,
560 u8 *frame_buf)
9ac19a90
JB		 561{
562 struct ieee80211_local *local = sdata->local;
46900298 563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 564 struct sk_buff *skb;
5fef7dbc 565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 566
5fef7dbc
JB		 567 /* build frame */
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 571 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 574 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
576
5fef7dbc
JB		 577 if (send_frame) {
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
580 if (!skb)
581 return;
d5cdfacb 582
5fef7dbc
JB		 583 skb_reserve(skb, local->hw.extra_tx_headroom);
584
585 /* copy in frame */
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
588
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 592 ieee80211_tx_skb(sdata, skb);
5fef7dbc 593 }
9ac19a90
JB		 594}
595
572e0012
KV		 596void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
598{
572e0012
KV		 599 struct ieee80211_pspoll *pspoll;
600 struct sk_buff *skb;
572e0012 601
d8cd189e
KV		 602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
603 if (!skb)
572e0012 604 return;
572e0012 605
d8cd189e
KV		 606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 608
62ae67be
JB		 609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 611}
612
965bedad
JB		 613void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
615 int powersave)
616{
617 struct sk_buff *skb;
d8cd189e 618 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 620
d8cd189e
KV		 621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
622 if (!skb)
965bedad 623 return;
965bedad 624
d8cd189e 625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 626 if (powersave)
d8cd189e 627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 628
62ae67be 629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
633
62ae67be 634 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 635}
636
d524215f
FF		 637static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
639{
640 struct sk_buff *skb;
641 struct ieee80211_hdr *nullfunc;
642 __le16 fc;
643
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
645 return;
646
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 648 if (!skb)
d524215f 649 return;
d15b8459 650
d524215f
FF		 651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
662
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
665}
666
cc32abd4
JB		 667/* spectrum management related things */
668static void ieee80211_chswitch_work(struct work_struct *work)
669{
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
673
9607e6b6 674 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 675 return;
676
77fdaa12
JB		 677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
679 goto out;
cc32abd4
JB		 680
681 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 686 } else {
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 689 }
77fdaa12 690
cc32abd4 691 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 692 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 693
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
705
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
708
709 trace_api_chswitch_done(sdata, success);
710 if (!success) {
711 /*
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
716 */
717 sdata->local->csa_channel = sdata->local->oper_channel;
718 }
719
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
721}
722EXPORT_SYMBOL(ieee80211_chswitch_done);
723
cc32abd4
JB		 724static void ieee80211_chswitch_timer(unsigned long data)
725{
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
729
5bb644a0
JB		 730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
732 return;
733 }
734
42935eca 735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 736}
737
738void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 740 struct ieee80211_bss *bss,
741 u64 timestamp)
cc32abd4 742{
0c1ad2ca
JB		 743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
cc32abd4 749
77fdaa12
JB		 750 ASSERT_MGD_MTX(ifmgd);
751
752 if (!ifmgd->associated)
cc32abd4
JB		 753 return;
754
fbe9c429 755 if (sdata->local->scanning)
cc32abd4
JB		 756 return;
757
758 /* Disregard subsequent beacons if we are already running a timer
759 processing a CSA */
760
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
762 return;
763
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
766 return;
767
768 sdata->local->csa_channel = new_ch;
769
5ce6e438
JB		 770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
775 if (sw_elem->mode) {
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
779 }
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
784 return;
785 }
786
787 /* channel switch handled in software */
cc32abd4 788 if (sw_elem->count <= 1) {
42935eca 789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 790 } else {
9feaddc7
WYG		 791 if (sw_elem->mode)
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
796 jiffies +
797 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 798 cbss->beacon_interval));
cc32abd4
JB		 799 }
800}
801
802static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
805{
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
807
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
809 return;
810
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
813 return;
814
a48b13ac 815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
819 }
820}
821
f90754c1
JO		 822void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
823{
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
827
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
831
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
834}
835EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
836
837void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
838{
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
842
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
846
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
852}
853EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
854
965bedad
JB		 855/* powersave */
856static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
858{
859 struct ieee80211_conf *conf = &local->hw.conf;
860
d5edaedc
JB		 861 /*
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
864 */
fbe9c429 865 if (local->scanning)
d5edaedc
JB		 866 return;
867
965bedad
JB		 868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
872 } else {
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 875
2a13052f
JO		 876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
878 return;
879
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 882 }
883}
884
885static void ieee80211_change_ps(struct ieee80211_local *local)
886{
887 struct ieee80211_conf *conf = &local->hw.conf;
888
889 if (local->ps_sdata) {
965bedad
JB		 890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
896 }
897}
898
808118cb
JY		 899static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
900{
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
c2c98fde 903 bool authorized = false;
808118cb
JY		 904
905 if (!mgd->powersave)
906 return false;
907
05cb9108
JB		 908 if (mgd->broken_ap)
909 return false;
910
808118cb
JY		 911 if (!mgd->associated)
912 return false;
913
914 if (!mgd->associated->beacon_ies)
915 return false;
916
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 return false;
920
921 rcu_read_lock();
922 sta = sta_info_get(sdata, mgd->bssid);
923 if (sta)
c2c98fde 924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 925 rcu_read_unlock();
926
c2c98fde 927 return authorized;
808118cb
JY		 928}
929
965bedad 930/* need to hold RTNL or interface lock */
10f644a4 931void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 932{
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
934 int count = 0;
195e294d 935 int timeout;
965bedad
JB		 936
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
939 return;
940 }
941
af6b6374
JB		 942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
944 goto change;
945 }
946
965bedad 947 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 948 if (!ieee80211_sdata_running(sdata))
965bedad 949 continue;
8c7914de
RM		 950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
953 * ps_sdata to NULL.
954 */
955 count = 0;
956 break;
957 }
965bedad
JB		 958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
959 continue;
960 found = sdata;
961 count++;
962 }
963
808118cb 964 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 965 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 966 s32 beaconint_us;
967
968 if (latency < 0)
ed77134b 969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 970
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
973
ff616381 974 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 975 if (timeout < 0) {
976 /*
ff616381
JO		 977 * Go to full PSM if the user configures a very low
978 * latency requirement.
0ab82b04
EP		 979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
981 * with real values.
195e294d 982 */
0ab82b04
EP		 983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
195e294d 985 timeout = 0;
ff616381
JO		 986 else
987 timeout = 100;
195e294d 988 }
f90754c1
JO		 989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
195e294d 993
04fe2037 994 if (beaconint_us > latency) {
10f644a4 995 local->ps_sdata = NULL;
04fe2037 996 } else {
56007a02 997 struct ieee80211_bss *bss;
04fe2037 998 int maxslp = 1;
56007a02 999 u8 dtimper;
04fe2037 1000
56007a02
JB		 1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1003
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1005 if (!dtimper)
1006 dtimper = 1;
1007 else if (dtimper > 1)
04fe2037
JB		 1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1010
9ccebe61 1011 local->hw.conf.max_sleep_period = maxslp;
56007a02 1012 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1013 local->ps_sdata = found;
04fe2037 1014 }
10f644a4 1015 } else {
965bedad 1016 local->ps_sdata = NULL;
10f644a4 1017 }
965bedad 1018
af6b6374 1019 change:
965bedad
JB		 1020 ieee80211_change_ps(local);
1021}
1022
1023void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1028
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1032 }
1033
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1036}
1037
1038void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1039{
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1044 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1045 unsigned long flags;
1046 int q;
965bedad
JB		 1047
1048 /* can only happen when PS was just disabled anyway */
1049 if (!sdata)
1050 return;
1051
5e34069c
CL		 1052 ifmgd = &sdata->u.mgd;
1053
965bedad
JB		 1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1055 return;
1056
77b7023a
AN		 1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1062 msecs_to_jiffies(
1063 local->hw.conf.dynamic_ps_timeout));
1064 return;
1065 }
77b7023a
AN		 1066
1067 /*
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1071 */
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1076 flags);
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1078 msecs_to_jiffies(
1079 local->hw.conf.dynamic_ps_timeout));
1080 return;
1081 }
1082 }
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1084 }
1ddc2867 1085
375177bf 1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1088 netif_tx_stop_all_queues(sdata->dev);
965bedad 1089
e8306f98
VN		 1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1092 msecs_to_jiffies(
1093 local->hw.conf.dynamic_ps_timeout));
1094 else {
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1098 }
f3e85b9e
VN		 1099 }
1100
2a13052f
JO		 1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1107 }
f3e85b9e 1108
77b7023a
AN		 1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1111}
1112
1113void ieee80211_dynamic_ps_timer(unsigned long data)
1114{
1115 struct ieee80211_local *local = (void *) data;
1116
78f1a8b7 1117 if (local->quiescing || local->suspended)
5bb644a0
JB		 1118 return;
1119
42935eca 1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1121}
1122
60f8b39c 1123/* MLME */
f698d856 1124static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1125 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1126 u8 *wmm_param, size_t wmm_param_len)
1127{
f0706e82 1128 struct ieee80211_tx_queue_params params;
4ced3f74 1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1130 size_t left;
1131 int count;
ab13315a 1132 u8 *pos, uapsd_queues = 0;
f0706e82 1133
e1b3ec1a
SG		 1134 if (!local->ops->conf_tx)
1135 return;
1136
32c5057b 1137 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1138 return;
1139
1140 if (!wmm_param)
1141 return;
1142
f0706e82
JB		 1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1144 return;
ab13315a
KV		 1145
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1147 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1148
f0706e82 1149 count = wmm_param[6] & 0x0f;
46900298 1150 if (count == ifmgd->wmm_last_param_set)
f0706e82 1151 return;
46900298 1152 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1153
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1156
1157 memset(&params, 0, sizeof(params));
1158
f0706e82
JB		 1159 local->wmm_acm = 0;
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1163 bool uapsd = false;
f0706e82
JB		 1164 int queue;
1165
1166 switch (aci) {
0eeb59fe 1167 case 1: /* AC_BK */
e100bb64 1168 queue = 3;
988c0f72 1169 if (acm)
0eeb59fe 1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1172 uapsd = true;
f0706e82 1173 break;
0eeb59fe 1174 case 2: /* AC_VI */
e100bb64 1175 queue = 1;
988c0f72 1176 if (acm)
0eeb59fe 1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1179 uapsd = true;
f0706e82 1180 break;
0eeb59fe 1181 case 3: /* AC_VO */
e100bb64 1182 queue = 0;
988c0f72 1183 if (acm)
0eeb59fe 1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1186 uapsd = true;
f0706e82 1187 break;
0eeb59fe 1188 case 0: /* AC_BE */
f0706e82 1189 default:
e100bb64 1190 queue = 2;
988c0f72 1191 if (acm)
0eeb59fe 1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1194 uapsd = true;
f0706e82
JB		 1195 break;
1196 }
1197
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1201 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1202 params.uapsd = uapsd;
1203
f4ea83dd 1204#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1208 queue, aci, acm,
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
3330d7be 1211#endif
f6f3def3
EP		 1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1216 queue);
f0706e82 1217 }
e1b3ec1a
SG		 1218
1219 /* enable WMM or activate new settings */
4ced3f74 1220 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1221}
1222
7a5158ef
JB		 1223static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1224 u16 capab, bool erp_valid, u8 erp)
5628221c 1225{
bda3933a 1226 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1227 u32 changed = 0;
7a5158ef
JB		 1228 bool use_protection;
1229 bool use_short_preamble;
1230 bool use_short_slot;
1231
1232 if (erp_valid) {
1233 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1234 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1235 } else {
1236 use_protection = false;
1237 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1238 }
1239
1240 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1241 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1242 use_short_slot = true;
5628221c 1243
471b3efd 1244 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1245 bss_conf->use_cts_prot = use_protection;
1246 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1247 }
7e9ed188 1248
d43c7b37 1249 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1250 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1251 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1252 }
d9430a32 1253
7a5158ef 1254 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1255 bss_conf->use_short_slot = use_short_slot;
1256 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1257 }
1258
1259 return changed;
1260}
1261
f698d856 1262static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1263 struct cfg80211_bss *cbss,
ae5eb026 1264 u32 bss_info_changed)
f0706e82 1265{
0c1ad2ca 1266 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1267 struct ieee80211_local *local = sdata->local;
68542962 1268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1269
ae5eb026 1270 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1271 /* set timing information */
68542962 1272 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1273 bss_conf->last_tsf = cbss->tsf;
5628221c 1274
77fdaa12
JB		 1275 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1276 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1277 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1278
7ccc8bd7
FF		 1279 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1281
0c1ad2ca
JB		 1282 sdata->u.mgd.associated = cbss;
1283 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1284
17e4ec14
JM		 1285 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1286
b291ba11
JB		 1287 /* just to be sure */
1288 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1289 IEEE80211_STA_BEACON_POLL);
1290
9ac19a90 1291 ieee80211_led_assoc(local, 1);
9306102e 1292
e5b900d2
JB		 1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1295 else
1296 bss_conf->dtim_period = 0;
1297
68542962 1298 bss_conf->assoc = 1;
9cef8737 1299
a97c13c3 1300 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1302 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1303 bss_info_changed |= BSS_CHANGED_CQM;
1304
68542962
JO		 1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1309 }
1310
ae5eb026 1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1312
056508dc
JB		 1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
025e6be2 1315 ieee80211_recalc_smps(local);
056508dc 1316 mutex_unlock(&local->iflist_mtx);
e0cb686f 1317
8a5b33f5 1318 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1319 netif_carrier_on(sdata->dev);
f0706e82
JB		 1320}
1321
e69e95db 1322static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1323 u16 stype, u16 reason, bool tx,
1324 u8 *frame_buf)
aa458d17 1325{
46900298 1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
3cc5240b 1329 u32 changed = 0;
b291ba11 1330 u8 bssid[ETH_ALEN];
aa458d17 1331
77fdaa12
JB		 1332 ASSERT_MGD_MTX(ifmgd);
1333
37ad3888
JB		 1334 if (WARN_ON_ONCE(tx && !frame_buf))
1335 return;
1336
b291ba11
JB		 1337 if (WARN_ON(!ifmgd->associated))
1338 return;
1339
0c1ad2ca 1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1341
77fdaa12
JB		 1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1344
1345 /*
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1350 */
1351 smp_mb();
1352
1353 /*
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1357 */
aa458d17 1358
8a5b33f5 1359 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1360 netif_carrier_off(sdata->dev);
1361
2a419056 1362 mutex_lock(&local->sta_mtx);
abe60632 1363 sta = sta_info_get(sdata, bssid);
4cad6c7c 1364 if (sta) {
c2c98fde 1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1367 }
2a419056 1368 mutex_unlock(&local->sta_mtx);
aa458d17 1369
37ad3888
JB		 1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1373 tx, frame_buf);
1374
1375 /* flush out frame */
1376 if (tx)
1377 drv_flush(local, false);
1378
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1381
1382 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1383 changed |= ieee80211_reset_erp_info(sdata);
1384
f5e5bf25 1385 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1388
413ad50a 1389 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1392
a8302de9
VT		 1393 local->power_constr_level = 0;
1394
520eb820
KV		 1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1397
e0cb686f
KV		 1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1401 }
a331400b 1402 local->ps_sdata = NULL;
ae5eb026 1403
68542962
JO		 1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1408 }
1409
3abead59
JB		 1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1412
0aaffa9b
JB		 1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1415 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1416
3cc5240b
JB		 1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1420
3abead59
JB		 1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1423
b9dcf712
JB		 1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1428}
f0706e82 1429
3cf335d5
KV		 1430void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1432{
1433 /*
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
3cf335d5 1440 */
b291ba11
JB		 1441 if (is_multicast_ether_addr(hdr->addr1))
1442 return;
1443
be099e82 1444 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1445}
f0706e82 1446
4e5ff376
FF		 1447static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1450 struct ieee80211_local *local = sdata->local;
4e5ff376 1451
133d40f9 1452 mutex_lock(&local->mtx);
4e5ff376 1453 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1454 IEEE80211_STA_CONNECTION_POLL))) {
1455 mutex_unlock(&local->mtx);
1456 return;
1457 }
4e5ff376
FF		 1458
1459 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1460 IEEE80211_STA_BEACON_POLL);
133d40f9
SG		 1461
1462 mutex_lock(&local->iflist_mtx);
1463 ieee80211_recalc_ps(local, -1);
1464 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1465
1466 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1467 goto out;
4e5ff376
FF		 1468
1469 /*
1470 * We've received a probe response, but are not sure whether
1471 * we have or will be receiving any beacons or data, so let's
1472 * schedule the timers again, just in case.
1473 */
1474 ieee80211_sta_reset_beacon_monitor(sdata);
1475
1476 mod_timer(&ifmgd->conn_mon_timer,
1477 round_jiffies_up(jiffies +
1478 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9
SG		 1479out:
1480 ieee80211_run_deferred_scan(local);
1481 mutex_unlock(&local->mtx);
4e5ff376
FF		 1482}
1483
1484void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1485 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1486{
75706d0e 1487 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1488 return;
1489
04ac3c0e
FF		 1490 if (ack)
1491 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1492
1493 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1494 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1495 if (ack)
1496 sdata->u.mgd.probe_send_count = 0;
1497 else
1498 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1499 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1500 }
1501}
1502
a43abf29
ML		 1503static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1504{
1505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1506 const u8 *ssid;
f01a067d 1507 u8 *dst = ifmgd->associated->bssid;
180205bd 1508 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1509
1510 /*
1511 * Try sending broadcast probe requests for the last three
1512 * probe requests after the first ones failed since some
1513 * buggy APs only support broadcast probe requests.
1514 */
1515 if (ifmgd->probe_send_count >= unicast_limit)
1516 dst = NULL;
a43abf29 1517
4e5ff376
FF		 1518 /*
1519 * When the hardware reports an accurate Tx ACK status, it's
1520 * better to send a nullfunc frame instead of a probe request,
1521 * as it will kick us off the AP quickly if we aren't associated
1522 * anymore. The timeout will be reset if the frame is ACKed by
1523 * the AP.
1524 */
04ac3c0e
FF		 1525 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1526 ifmgd->nullfunc_failed = false;
4e5ff376 1527 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1528 } else {
88c868c4
SG		 1529 int ssid_len;
1530
4e5ff376 1531 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1532 if (WARN_ON_ONCE(ssid == NULL))
1533 ssid_len = 0;
1534 else
1535 ssid_len = ssid[1];
1536
1537 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1538 0, (u32) -1, true, false);
4e5ff376 1539 }
a43abf29
ML		 1540
1541 ifmgd->probe_send_count++;
180205bd 1542 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1543 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1544 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1545 drv_flush(sdata->local, false);
a43abf29
ML		 1546}
1547
b291ba11
JB		 1548static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1549 bool beacon)
04de8381 1550{
04de8381 1551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1552 bool already = false;
34bfc411 1553
9607e6b6 1554 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1555 return;
1556
77fdaa12
JB		 1557 mutex_lock(&ifmgd->mtx);
1558
1559 if (!ifmgd->associated)
1560 goto out;
1561
133d40f9
SG		 1562 mutex_lock(&sdata->local->mtx);
1563
1564 if (sdata->local->tmp_channel || sdata->local->scanning) {
1565 mutex_unlock(&sdata->local->mtx);
1566 goto out;
1567 }
1568
a860402d 1569#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 1570 if (beacon)
1571 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1572 sdata->name);
a860402d 1573#endif
04de8381 1574
b291ba11
JB		 1575 /*
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1580 *
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1585 */
1586 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1587 IEEE80211_STA_CONNECTION_POLL))
1588 already = true;
1589
1590 if (beacon)
1591 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1592 else
1593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1594
133d40f9
SG		 1595 mutex_unlock(&sdata->local->mtx);
1596
b291ba11
JB		 1597 if (already)
1598 goto out;
1599
4e751843
JB		 1600 mutex_lock(&sdata->local->iflist_mtx);
1601 ieee80211_recalc_ps(sdata->local, -1);
1602 mutex_unlock(&sdata->local->iflist_mtx);
1603
a43abf29
ML		 1604 ifmgd->probe_send_count = 0;
1605 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1606 out:
1607 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1608}
1609
a619a4c0
JO		 1610struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1611 struct ieee80211_vif *vif)
1612{
1613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1615 struct sk_buff *skb;
1616 const u8 *ssid;
88c868c4 1617 int ssid_len;
a619a4c0
JO		 1618
1619 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1620 return NULL;
1621
1622 ASSERT_MGD_MTX(ifmgd);
1623
1624 if (!ifmgd->associated)
1625 return NULL;
1626
1627 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1628 if (WARN_ON_ONCE(ssid == NULL))
1629 ssid_len = 0;
1630 else
1631 ssid_len = ssid[1];
1632
a619a4c0 1633 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1634 (u32) -1, ssid + 2, ssid_len,
85a237fe 1635 NULL, 0, true);
a619a4c0
JO		 1636
1637 return skb;
1638}
1639EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1640
1e4dcd01
JO		 1641static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1642{
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct ieee80211_local *local = sdata->local;
1645 u8 bssid[ETH_ALEN];
5fef7dbc 1646 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1647
1648 mutex_lock(&ifmgd->mtx);
1649 if (!ifmgd->associated) {
1650 mutex_unlock(&ifmgd->mtx);
1651 return;
1652 }
1653
1654 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1655
180205bd
BG		 1656 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1657 sdata->name, bssid);
1e4dcd01 1658
37ad3888
JB		 1659 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1661 false, frame_buf);
1e4dcd01 1662 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1663
1e4dcd01
JO		 1664 /*
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1667 */
5fef7dbc 1668 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1669
1670 mutex_lock(&local->mtx);
1671 ieee80211_recalc_idle(local);
1672 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1673}
1674
1675void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1676{
1677 struct ieee80211_sub_if_data *sdata =
1678 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1679 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1681 struct sta_info *sta;
1682
1683 if (ifmgd->associated) {
30fa9047 1684 rcu_read_lock();
a85e1d55
PS		 1685 sta = sta_info_get(sdata, ifmgd->bssid);
1686 if (sta)
1687 sta->beacon_loss_count++;
30fa9047 1688 rcu_read_unlock();
a85e1d55 1689 }
b291ba11 1690
1e4dcd01
JO		 1691 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1692 __ieee80211_connection_loss(sdata);
1693 else
1694 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1695}
1696
04de8381
KV		 1697void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1698{
1699 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1700 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1701
b5878a2d
JB		 1702 trace_api_beacon_loss(sdata);
1703
1e4dcd01
JO		 1704 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1705 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1706}
1707EXPORT_SYMBOL(ieee80211_beacon_loss);
1708
1e4dcd01
JO		 1709void ieee80211_connection_loss(struct ieee80211_vif *vif)
1710{
1711 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1712 struct ieee80211_hw *hw = &sdata->local->hw;
1713
b5878a2d
JB		 1714 trace_api_connection_loss(sdata);
1715
1e4dcd01
JO		 1716 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1717 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1718}
1719EXPORT_SYMBOL(ieee80211_connection_loss);
1720
1721
66e67e41
JB		 1722static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1723 bool assoc)
1724{
1725 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1726
1727 lockdep_assert_held(&sdata->u.mgd.mtx);
1728
66e67e41
JB		 1729 if (!assoc) {
1730 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1731
1732 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1733 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1734 }
1735
1736 cfg80211_put_bss(auth_data->bss);
1737 kfree(auth_data);
1738 sdata->u.mgd.auth_data = NULL;
1739}
1740
1741static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1742 struct ieee80211_mgmt *mgmt, size_t len)
1743{
1744 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1745 u8 *pos;
1746 struct ieee802_11_elems elems;
1747
1748 pos = mgmt->u.auth.variable;
1749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1750 if (!elems.challenge)
1751 return;
1752 auth_data->expected_transaction = 4;
1753 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1754 elems.challenge - 2, elems.challenge_len + 2,
1755 auth_data->bss->bssid, auth_data->bss->bssid,
1756 auth_data->key, auth_data->key_len,
1757 auth_data->key_idx);
1758}
1759
1760static enum rx_mgmt_action __must_check
1761ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1762 struct ieee80211_mgmt *mgmt, size_t len)
1763{
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 u8 bssid[ETH_ALEN];
1766 u16 auth_alg, auth_transaction, status_code;
1767 struct sta_info *sta;
1768
1769 lockdep_assert_held(&ifmgd->mtx);
1770
1771 if (len < 24 + 6)
1772 return RX_MGMT_NONE;
1773
1774 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1775 return RX_MGMT_NONE;
1776
1777 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1778
b203ca39 1779 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1780 return RX_MGMT_NONE;
1781
1782 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1783 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1784 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1785
1786 if (auth_alg != ifmgd->auth_data->algorithm ||
1787 auth_transaction != ifmgd->auth_data->expected_transaction)
1788 return RX_MGMT_NONE;
1789
1790 if (status_code != WLAN_STATUS_SUCCESS) {
1791 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1792 sdata->name, mgmt->sa, status_code);
1793 goto out;
1794 }
1795
1796 switch (ifmgd->auth_data->algorithm) {
1797 case WLAN_AUTH_OPEN:
1798 case WLAN_AUTH_LEAP:
1799 case WLAN_AUTH_FT:
1800 break;
1801 case WLAN_AUTH_SHARED_KEY:
1802 if (ifmgd->auth_data->expected_transaction != 4) {
1803 ieee80211_auth_challenge(sdata, mgmt, len);
1804 /* need another frame */
1805 return RX_MGMT_NONE;
1806 }
1807 break;
1808 default:
1809 WARN_ONCE(1, "invalid auth alg %d",
1810 ifmgd->auth_data->algorithm);
1811 return RX_MGMT_NONE;
1812 }
1813
1814 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1815 out:
66e67e41
JB		 1816 ifmgd->auth_data->done = true;
1817 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1818 run_again(ifmgd, ifmgd->auth_data->timeout);
1819
1820 /* move station state to auth */
1821 mutex_lock(&sdata->local->sta_mtx);
1822 sta = sta_info_get(sdata, bssid);
1823 if (!sta) {
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1825 goto out_err;
1826 }
1827 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1828 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1829 sdata->name, bssid);
1830 goto out_err;
1831 }
1832 mutex_unlock(&sdata->local->sta_mtx);
1833
1834 return RX_MGMT_CFG80211_RX_AUTH;
1835 out_err:
1836 mutex_unlock(&sdata->local->sta_mtx);
1837 /* ignore frame -- wait for timeout */
1838 return RX_MGMT_NONE;
1839}
1840
1841
77fdaa12
JB		 1842static enum rx_mgmt_action __must_check
1843ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1844 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1845{
46900298 1846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1847 const u8 *bssid = NULL;
f0706e82
JB		 1848 u16 reason_code;
1849
66e67e41
JB		 1850 lockdep_assert_held(&ifmgd->mtx);
1851
f4ea83dd 1852 if (len < 24 + 2)
77fdaa12 1853 return RX_MGMT_NONE;
f0706e82 1854
66e67e41 1855 if (!ifmgd->associated ||
b203ca39 1856 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1857 return RX_MGMT_NONE;
77fdaa12 1858
0c1ad2ca 1859 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1860
1861 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1862
77fdaa12 1863 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1864 sdata->name, bssid, reason_code);
77fdaa12 1865
37ad3888
JB		 1866 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1867
7da7cc1d 1868 mutex_lock(&sdata->local->mtx);
63f170e0 1869 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1870 mutex_unlock(&sdata->local->mtx);
f0706e82 1871
77fdaa12 1872 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1873}
1874
1875
77fdaa12
JB		 1876static enum rx_mgmt_action __must_check
1877ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1878 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1879{
46900298 1880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1881 u16 reason_code;
1882
66e67e41 1883 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1884
66e67e41 1885 if (len < 24 + 2)
77fdaa12
JB		 1886 return RX_MGMT_NONE;
1887
66e67e41 1888 if (!ifmgd->associated ||
b203ca39 1889 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1890 return RX_MGMT_NONE;
f0706e82
JB		 1891
1892 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1893
0ff71613 1894 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1895 sdata->name, mgmt->sa, reason_code);
f0706e82 1896
37ad3888
JB		 1897 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1898
7da7cc1d 1899 mutex_lock(&sdata->local->mtx);
bc83b681 1900 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1901 mutex_unlock(&sdata->local->mtx);
37ad3888 1902
77fdaa12 1903 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1904}
1905
c74d084f
CL		 1906static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1907 u8 *supp_rates, unsigned int supp_rates_len,
1908 u32 *rates, u32 *basic_rates,
1909 bool *have_higher_than_11mbit,
1910 int *min_rate, int *min_rate_index)
1911{
1912 int i, j;
1913
1914 for (i = 0; i < supp_rates_len; i++) {
1915 int rate = (supp_rates[i] & 0x7f) * 5;
1916 bool is_basic = !!(supp_rates[i] & 0x80);
1917
1918 if (rate > 110)
1919 *have_higher_than_11mbit = true;
1920
1921 /*
1922 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1923 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1924 *
1925 * Note: Even through the membership selector and the basic
1926 * rate flag share the same bit, they are not exactly
1927 * the same.
1928 */
1929 if (!!(supp_rates[i] & 0x80) &&
1930 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1931 continue;
1932
1933 for (j = 0; j < sband->n_bitrates; j++) {
1934 if (sband->bitrates[j].bitrate == rate) {
1935 *rates |= BIT(j);
1936 if (is_basic)
1937 *basic_rates |= BIT(j);
1938 if (rate < *min_rate) {
1939 *min_rate = rate;
1940 *min_rate_index = j;
1941 }
1942 break;
1943 }
1944 }
1945 }
1946}
f0706e82 1947
66e67e41
JB		 1948static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1949 bool assoc)
1950{
1951 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1952
1953 lockdep_assert_held(&sdata->u.mgd.mtx);
1954
66e67e41
JB		 1955 if (!assoc) {
1956 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1957
1958 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1959 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1960 }
1961
1962 kfree(assoc_data);
1963 sdata->u.mgd.assoc_data = NULL;
1964}
1965
1966static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1967 struct cfg80211_bss *cbss,
af6b6374 1968 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1969{
46900298 1970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1971 struct ieee80211_local *local = sdata->local;
8318d78a 1972 struct ieee80211_supported_band *sband;
f0706e82 1973 struct sta_info *sta;
af6b6374 1974 u8 *pos;
af6b6374 1975 u16 capab_info, aid;
f0706e82 1976 struct ieee802_11_elems elems;
bda3933a 1977 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1978 u32 changed = 0;
c74d084f 1979 int err;
f0706e82 1980
af6b6374 1981 /* AssocResp and ReassocResp have identical structure */
f0706e82 1982
f0706e82 1983 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1984 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1985
1dd84aa2 1986 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1987 printk(KERN_DEBUG
1988 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1989 sdata->name, aid);
1dd84aa2
JB		 1990 aid &= ~(BIT(15) | BIT(14));
1991
05cb9108
JB		 1992 ifmgd->broken_ap = false;
1993
1994 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1995 printk(KERN_DEBUG
1996 "%s: invalid AID value %d (out of range), turn off PS\n",
1997 sdata->name, aid);
1998 aid = 0;
1999 ifmgd->broken_ap = true;
2000 }
2001
af6b6374
JB		 2002 pos = mgmt->u.assoc_resp.variable;
2003 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2004
f0706e82
JB		 2005 if (!elems.supp_rates) {
2006 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2007 sdata->name);
af6b6374 2008 return false;
f0706e82
JB		 2009 }
2010
46900298 2011 ifmgd->aid = aid;
f0706e82 2012
2a33bee2
GE		 2013 mutex_lock(&sdata->local->sta_mtx);
2014 /*
2015 * station info was already allocated and inserted before
2016 * the association and should be available to us
2017 */
7852e361 2018 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2019 if (WARN_ON(!sta)) {
2020 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2021 return false;
77fdaa12 2022 }
05e5e883 2023
66e67e41 2024 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2025
ab1faead 2026 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2027 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2028 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2029
64f68e5d
JB		 2030 sta->supports_40mhz =
2031 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2032
4b7679a5 2033 rate_control_rate_init(sta);
f0706e82 2034
46900298 2035 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2036 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2037
ddf4ac53 2038 if (elems.wmm_param)
c2c98fde 2039 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2040
c8987876
JB		 2041 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2042 if (!err)
2043 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2044 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2045 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2046 if (err) {
2047 printk(KERN_DEBUG
2048 "%s: failed to move station %pM to desired state\n",
2049 sdata->name, sta->sta.addr);
2050 WARN_ON(__sta_info_destroy(sta));
2051 mutex_unlock(&sdata->local->sta_mtx);
2052 return false;
2053 }
2054
7852e361 2055 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2056
f2176d72
JO		 2057 /*
2058 * Always handle WMM once after association regardless
2059 * of the first value the AP uses. Setting -1 here has
2060 * that effect because the AP values is an unsigned
2061 * 4-bit value.
2062 */
2063 ifmgd->wmm_last_param_set = -1;
2064
ddf4ac53 2065 if (elems.wmm_param)
4ced3f74 2066 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2067 elems.wmm_param_len);
aa837e1d 2068 else
3abead59
JB		 2069 ieee80211_set_wmm_default(sdata, false);
2070 changed |= BSS_CHANGED_QOS;
f0706e82 2071
074d46d1 2072 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2073 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2074 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2075 cbss->bssid, false);
ae5eb026 2076
60f8b39c
JB		 2077 /* set AID and assoc capability,
2078 * ieee80211_set_associated() will tell the driver */
2079 bss_conf->aid = aid;
2080 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2081 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2082
d524215f
FF		 2083 /*
2084 * If we're using 4-addr mode, let the AP know that we're
2085 * doing so, so that it can create the STA VLAN on its side
2086 */
2087 if (ifmgd->use_4addr)
2088 ieee80211_send_4addr_nullfunc(local, sdata);
2089
15b7b062 2090 /*
b291ba11
JB		 2091 * Start timer to probe the connection to the AP now.
2092 * Also start the timer that will detect beacon loss.
15b7b062 2093 */
b291ba11 2094 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2095 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2096
af6b6374 2097 return true;
f0706e82
JB		 2098}
2099
66e67e41
JB		 2100static enum rx_mgmt_action __must_check
2101ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_mgmt *mgmt, size_t len,
2103 struct cfg80211_bss **bss)
2104{
2105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2106 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2107 u16 capab_info, status_code, aid;
2108 struct ieee802_11_elems elems;
2109 u8 *pos;
2110 bool reassoc;
2111
2112 lockdep_assert_held(&ifmgd->mtx);
2113
2114 if (!assoc_data)
2115 return RX_MGMT_NONE;
b203ca39 2116 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2117 return RX_MGMT_NONE;
2118
2119 /*
2120 * AssocResp and ReassocResp have identical structure, so process both
2121 * of them in this function.
2122 */
2123
2124 if (len < 24 + 6)
2125 return RX_MGMT_NONE;
2126
2127 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2128 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2129 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2130 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2131
2132 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2133 "status=%d aid=%d)\n",
2134 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2135 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2136
2137 pos = mgmt->u.assoc_resp.variable;
2138 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2139
2140 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2141 elems.timeout_int && elems.timeout_int_len == 5 &&
2142 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2143 u32 tu, ms;
2144 tu = get_unaligned_le32(elems.timeout_int + 1);
2145 ms = tu * 1024 / 1000;
2146 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2147 "comeback duration %u TU (%u ms)\n",
2148 sdata->name, mgmt->sa, tu, ms);
2149 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2150 if (ms > IEEE80211_ASSOC_TIMEOUT)
2151 run_again(ifmgd, assoc_data->timeout);
2152 return RX_MGMT_NONE;
2153 }
2154
2155 *bss = assoc_data->bss;
2156
2157 if (status_code != WLAN_STATUS_SUCCESS) {
2158 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2159 sdata->name, mgmt->sa, status_code);
2160 ieee80211_destroy_assoc_data(sdata, false);
2161 } else {
2162 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2163
66e67e41
JB		 2164 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2165 /* oops -- internal error -- send timeout for now */
79ebfb85 2166 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2167 sta_info_destroy_addr(sdata, mgmt->bssid);
2168 cfg80211_put_bss(*bss);
2169 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2170 }
79ebfb85
JB		 2171
2172 /*
2173 * destroy assoc_data afterwards, as otherwise an idle
2174 * recalc after assoc_data is NULL but before associated
2175 * is set can cause the interface to go idle
2176 */
2177 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2178 }
2179
2180 return RX_MGMT_CFG80211_RX_ASSOC;
2181}
98c8fccf
JB		 2182static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2183 struct ieee80211_mgmt *mgmt,
2184 size_t len,
2185 struct ieee80211_rx_status *rx_status,
2186 struct ieee802_11_elems *elems,
2187 bool beacon)
2188{
2189 struct ieee80211_local *local = sdata->local;
2190 int freq;
c2b13452 2191 struct ieee80211_bss *bss;
98c8fccf 2192 struct ieee80211_channel *channel;
56007a02
JB		 2193 bool need_ps = false;
2194
66e67e41 2195 if (sdata->u.mgd.associated &&
b203ca39 2196 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2197 bss = (void *)sdata->u.mgd.associated->priv;
2198 /* not previously set so we may need to recalc */
2199 need_ps = !bss->dtim_period;
2200 }
98c8fccf
JB		 2201
2202 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2203 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2204 rx_status->band);
98c8fccf
JB		 2205 else
2206 freq = rx_status->freq;
2207
2208 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2209
2210 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2211 return;
2212
98c8fccf 2213 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2214 channel, beacon);
77fdaa12
JB		 2215 if (bss)
2216 ieee80211_rx_bss_put(local, bss);
2217
2218 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2219 return;
2220
56007a02
JB		 2221 if (need_ps) {
2222 mutex_lock(&local->iflist_mtx);
2223 ieee80211_recalc_ps(local, -1);
2224 mutex_unlock(&local->iflist_mtx);
2225 }
2226
c481ec97 2227 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2228 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2229 ETH_ALEN) == 0)) {
c481ec97
S		 2230 struct ieee80211_channel_sw_ie *sw_elem =
2231 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2232 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2233 bss, rx_status->mactime);
c481ec97 2234 }
f0706e82
JB		 2235}
2236
2237
f698d856 2238static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2239 struct sk_buff *skb)
f0706e82 2240{
af6b6374 2241 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2242 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2243 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2244 size_t baselen, len = skb->len;
ae6a44e3
EK		 2245 struct ieee802_11_elems elems;
2246
15b7b062
KV		 2247 ifmgd = &sdata->u.mgd;
2248
77fdaa12
JB		 2249 ASSERT_MGD_MTX(ifmgd);
2250
b203ca39 2251 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2252 return; /* ignore ProbeResp to foreign address */
2253
ae6a44e3
EK		 2254 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2255 if (baselen > len)
2256 return;
2257
2258 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2259 &elems);
2260
98c8fccf 2261 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2262
77fdaa12 2263 if (ifmgd->associated &&
b203ca39 2264 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2265 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2266
2267 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2268 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41
JB		 2269 /* got probe response, continue with auth */
2270 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2271 ifmgd->auth_data->tries = 0;
2272 ifmgd->auth_data->timeout = jiffies;
2273 run_again(ifmgd, ifmgd->auth_data->timeout);
2274 }
f0706e82
JB		 2275}
2276
d91f36db
JB		 2277/*
2278 * This is the canonical list of information elements we care about,
2279 * the filter code also gives us all changes to the Microsoft OUI
2280 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2281 *
2282 * We implement beacon filtering in software since that means we can
2283 * avoid processing the frame here and in cfg80211, and userspace
2284 * will not be able to tell whether the hardware supports it or not.
2285 *
2286 * XXX: This list needs to be dynamic -- userspace needs to be able to
2287 * add items it requires. It also needs to be able to tell us to
2288 * look out for other vendor IEs.
2289 */
2290static const u64 care_about_ies =
1d4df3a5
JB		 2291 (1ULL << WLAN_EID_COUNTRY) |
2292 (1ULL << WLAN_EID_ERP_INFO) |
2293 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2294 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2295 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2296 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2297
f698d856 2298static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2299 struct ieee80211_mgmt *mgmt,
2300 size_t len,
2301 struct ieee80211_rx_status *rx_status)
2302{
d91f36db 2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2304 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2305 size_t baselen;
2306 struct ieee802_11_elems elems;
f698d856 2307 struct ieee80211_local *local = sdata->local;
471b3efd 2308 u32 changed = 0;
d91f36db 2309 bool erp_valid, directed_tim = false;
7a5158ef 2310 u8 erp_value = 0;
d91f36db 2311 u32 ncrc;
77fdaa12
JB		 2312 u8 *bssid;
2313
66e67e41 2314 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2315
ae6a44e3
EK		 2316 /* Process beacon from the current BSS */
2317 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2318 if (baselen > len)
2319 return;
2320
d91f36db 2321 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2322 return;
f0706e82 2323
66e67e41 2324 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2325 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2326 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2327 len - baselen, &elems);
77fdaa12 2328
66e67e41
JB		 2329 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2330 false);
2331 ifmgd->assoc_data->have_beacon = true;
2332 ifmgd->assoc_data->sent_assoc = false;
2333 /* continue assoc process */
2334 ifmgd->assoc_data->timeout = jiffies;
2335 run_again(ifmgd, ifmgd->assoc_data->timeout);
2336 return;
2337 }
77fdaa12 2338
66e67e41 2339 if (!ifmgd->associated ||
b203ca39 2340 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2341 return;
66e67e41 2342 bssid = ifmgd->associated->bssid;
f0706e82 2343
17e4ec14
JM		 2344 /* Track average RSSI from the Beacon frames of the current AP */
2345 ifmgd->last_beacon_signal = rx_status->signal;
2346 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2347 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2348 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2349 ifmgd->last_cqm_event_signal = 0;
391a200a 2350 ifmgd->count_beacon_signal = 1;
615f7b9b 2351 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2352 } else {
2353 ifmgd->ave_beacon_signal =
2354 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2355 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2356 ifmgd->ave_beacon_signal) / 16;
391a200a 2357 ifmgd->count_beacon_signal++;
17e4ec14 2358 }
615f7b9b
MV		 2359
2360 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2361 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2362 int sig = ifmgd->ave_beacon_signal;
2363 int last_sig = ifmgd->last_ave_beacon_signal;
2364
2365 /*
2366 * if signal crosses either of the boundaries, invoke callback
2367 * with appropriate parameters
2368 */
2369 if (sig > ifmgd->rssi_max_thold &&
2370 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2371 ifmgd->last_ave_beacon_signal = sig;
2372 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2373 } else if (sig < ifmgd->rssi_min_thold &&
2374 (last_sig >= ifmgd->rssi_max_thold ||
2375 last_sig == 0)) {
2376 ifmgd->last_ave_beacon_signal = sig;
2377 drv_rssi_callback(local, RSSI_EVENT_LOW);
2378 }
2379 }
2380
17e4ec14 2381 if (bss_conf->cqm_rssi_thold &&
391a200a 2382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2383 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2384 int sig = ifmgd->ave_beacon_signal / 16;
2385 int last_event = ifmgd->last_cqm_event_signal;
2386 int thold = bss_conf->cqm_rssi_thold;
2387 int hyst = bss_conf->cqm_rssi_hyst;
2388 if (sig < thold &&
2389 (last_event == 0 || sig < last_event - hyst)) {
2390 ifmgd->last_cqm_event_signal = sig;
2391 ieee80211_cqm_rssi_notify(
2392 &sdata->vif,
2393 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2394 GFP_KERNEL);
2395 } else if (sig > thold &&
2396 (last_event == 0 || sig > last_event + hyst)) {
2397 ifmgd->last_cqm_event_signal = sig;
2398 ieee80211_cqm_rssi_notify(
2399 &sdata->vif,
2400 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2401 GFP_KERNEL);
2402 }
2403 }
2404
b291ba11 2405 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180 2406#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 2407 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2408 sdata->name);
92778180 2409#endif
b291ba11 2410 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2411 mutex_lock(&local->iflist_mtx);
2412 ieee80211_recalc_ps(local, -1);
2413 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2414 }
2415
b291ba11
JB		 2416 /*
2417 * Push the beacon loss detection into the future since
2418 * we are processing a beacon from the AP just now.
2419 */
d3a910a8 2420 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2421
d91f36db
JB		 2422 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2423 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2424 len - baselen, &elems,
2425 care_about_ies, ncrc);
2426
2427 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2428 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2429 ifmgd->aid);
d91f36db 2430
d8ec4433 2431 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2432 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2433 true);
d91f36db 2434
4ced3f74 2435 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2436 elems.wmm_param_len);
2437 }
fe3fa827 2438
25c9c875 2439 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2440 if (directed_tim) {
572e0012 2441 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2442 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2443 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2444 ieee80211_hw_config(local,
2445 IEEE80211_CONF_CHANGE_PS);
2446 }
572e0012 2447 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2448 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2449 local->pspolling = true;
2450
2451 /*
2452 * Here is assumed that the driver will be
2453 * able to send ps-poll frame and receive a
2454 * response even though power save mode is
2455 * enabled, but some drivers might require
2456 * to disable power save here. This needs
2457 * to be investigated.
2458 */
2459 ieee80211_send_pspoll(local, sdata);
2460 }
a97b77b9
VN		 2461 }
2462 }
7a5158ef 2463
d8ec4433 2464 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2465 return;
2466 ifmgd->beacon_crc = ncrc;
d8ec4433 2467 ifmgd->beacon_crc_valid = true;
30196673 2468
7a5158ef
JB		 2469 if (elems.erp_info && elems.erp_info_len >= 1) {
2470 erp_valid = true;
2471 erp_value = elems.erp_info[0];
2472 } else {
2473 erp_valid = false;
50c4afb9 2474 }
7a5158ef
JB		 2475 changed |= ieee80211_handle_bss_capability(sdata,
2476 le16_to_cpu(mgmt->u.beacon.capab_info),
2477 erp_valid, erp_value);
f0706e82 2478
d3c990fb 2479
074d46d1 2480 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2481 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2482 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2483
2484 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2485
24398e39
JB		 2486 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2487 bssid, true);
d3c990fb
RR		 2488 }
2489
8b19e6ca 2490 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2491 if (elems.country_elem) {
a8302de9
VT		 2492 /* TODO: IBSS also needs this */
2493 if (elems.pwr_constr_elem)
2494 ieee80211_handle_pwr_constr(sdata,
2495 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2496 elems.pwr_constr_elem,
2497 elems.pwr_constr_elem_len);
3f2355cb
LR		 2498 }
2499
471b3efd 2500 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2501}
2502
1fa57d01
JB		 2503void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2504 struct sk_buff *skb)
f0706e82 2505{
77fdaa12 2506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2507 struct ieee80211_rx_status *rx_status;
f0706e82 2508 struct ieee80211_mgmt *mgmt;
66e67e41 2509 struct cfg80211_bss *bss = NULL;
77fdaa12 2510 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2511 u16 fc;
2512
f0706e82
JB		 2513 rx_status = (struct ieee80211_rx_status *) skb->cb;
2514 mgmt = (struct ieee80211_mgmt *) skb->data;
2515 fc = le16_to_cpu(mgmt->frame_control);
2516
77fdaa12
JB		 2517 mutex_lock(&ifmgd->mtx);
2518
66e67e41
JB		 2519 switch (fc & IEEE80211_FCTL_STYPE) {
2520 case IEEE80211_STYPE_BEACON:
2521 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2522 break;
2523 case IEEE80211_STYPE_PROBE_RESP:
2524 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2525 break;
2526 case IEEE80211_STYPE_AUTH:
2527 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2528 break;
2529 case IEEE80211_STYPE_DEAUTH:
2530 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2531 break;
2532 case IEEE80211_STYPE_DISASSOC:
2533 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2534 break;
2535 case IEEE80211_STYPE_ASSOC_RESP:
2536 case IEEE80211_STYPE_REASSOC_RESP:
2537 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2538 break;
2539 case IEEE80211_STYPE_ACTION:
2540 switch (mgmt->u.action.category) {
2541 case WLAN_CATEGORY_SPECTRUM_MGMT:
2542 ieee80211_sta_process_chanswitch(sdata,
2543 &mgmt->u.action.u.chan_switch.sw_elem,
2544 (void *)ifmgd->associated->priv,
2545 rx_status->mactime);
77fdaa12 2546 break;
77fdaa12 2547 }
77fdaa12 2548 }
77fdaa12
JB		 2549 mutex_unlock(&ifmgd->mtx);
2550
66e67e41
JB		 2551 switch (rma) {
2552 case RX_MGMT_NONE:
2553 /* no action */
2554 break;
2555 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2556 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2557 break;
2558 case RX_MGMT_CFG80211_DISASSOC:
2559 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2560 break;
2561 case RX_MGMT_CFG80211_RX_AUTH:
2562 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2563 break;
2564 case RX_MGMT_CFG80211_RX_ASSOC:
2565 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2566 break;
2567 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2568 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2569 break;
2570 default:
2571 WARN(1, "unexpected: %d", rma);
b054b747 2572 }
f0706e82
JB		 2573}
2574
9c6bd790 2575static void ieee80211_sta_timer(unsigned long data)
f0706e82 2576{
60f8b39c
JB		 2577 struct ieee80211_sub_if_data *sdata =
2578 (struct ieee80211_sub_if_data *) data;
46900298 2579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2580 struct ieee80211_local *local = sdata->local;
f0706e82 2581
5bb644a0
JB		 2582 if (local->quiescing) {
2583 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2584 return;
2585 }
2586
64592c8f 2587 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2588}
2589
04ac3c0e 2590static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2591 u8 *bssid, u8 reason)
04ac3c0e
FF		 2592{
2593 struct ieee80211_local *local = sdata->local;
2594 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2595 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2596
2597 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2598 IEEE80211_STA_BEACON_POLL);
2599
37ad3888
JB		 2600 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2601 false, frame_buf);
04ac3c0e 2602 mutex_unlock(&ifmgd->mtx);
37ad3888 2603
04ac3c0e
FF		 2604 /*
2605 * must be outside lock due to cfg80211,
2606 * but that's not a problem.
2607 */
5fef7dbc 2608 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2609
2610 mutex_lock(&local->mtx);
2611 ieee80211_recalc_idle(local);
2612 mutex_unlock(&local->mtx);
2613
04ac3c0e
FF		 2614 mutex_lock(&ifmgd->mtx);
2615}
2616
66e67e41
JB		 2617static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2618{
2619 struct ieee80211_local *local = sdata->local;
2620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2621 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2622
2623 lockdep_assert_held(&ifmgd->mtx);
2624
2625 if (WARN_ON_ONCE(!auth_data))
2626 return -EINVAL;
2627
66e67e41
JB		 2628 auth_data->tries++;
2629
2630 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2631 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2632 sdata->name, auth_data->bss->bssid);
2633
2634 /*
2635 * Most likely AP is not in the range so remove the
2636 * bss struct for that AP.
2637 */
2638 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2639
2640 return -ETIMEDOUT;
2641 }
2642
2643 if (auth_data->bss->proberesp_ies) {
2644 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2645 sdata->name, auth_data->bss->bssid, auth_data->tries,
2646 IEEE80211_AUTH_MAX_TRIES);
2647
2648 auth_data->expected_transaction = 2;
2649 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2650 auth_data->ie, auth_data->ie_len,
2651 auth_data->bss->bssid,
2652 auth_data->bss->bssid, NULL, 0, 0);
2653 } else {
2654 const u8 *ssidie;
2655
2656 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2657 sdata->name, auth_data->bss->bssid, auth_data->tries,
2658 IEEE80211_AUTH_MAX_TRIES);
2659
2660 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2661 if (!ssidie)
2662 return -EINVAL;
2663 /*
2664 * Direct probe is sent to broadcast address as some APs
2665 * will not answer to direct packet in unassociated state.
2666 */
2667 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2668 NULL, 0, (u32) -1, true, false);
2669 }
2670
2671 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2672 run_again(ifmgd, auth_data->timeout);
2673
2674 return 0;
2675}
2676
2677static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2678{
2679 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2680 struct ieee80211_local *local = sdata->local;
2681
2682 lockdep_assert_held(&sdata->u.mgd.mtx);
2683
66e67e41
JB		 2684 assoc_data->tries++;
2685 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2686 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2687 sdata->name, assoc_data->bss->bssid);
2688
2689 /*
2690 * Most likely AP is not in the range so remove the
2691 * bss struct for that AP.
2692 */
2693 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2694
2695 return -ETIMEDOUT;
2696 }
2697
2698 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2699 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2700 IEEE80211_ASSOC_MAX_TRIES);
2701 ieee80211_send_assoc(sdata);
2702
2703 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2704 run_again(&sdata->u.mgd, assoc_data->timeout);
2705
2706 return 0;
2707}
2708
1fa57d01 2709void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2710{
9c6bd790 2711 struct ieee80211_local *local = sdata->local;
1fa57d01 2712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2713
77fdaa12
JB		 2714 mutex_lock(&ifmgd->mtx);
2715
66e67e41
JB		 2716 if (ifmgd->auth_data &&
2717 time_after(jiffies, ifmgd->auth_data->timeout)) {
2718 if (ifmgd->auth_data->done) {
2719 /*
2720 * ok ... we waited for assoc but userspace didn't,
2721 * so let's just kill the auth data
2722 */
2723 ieee80211_destroy_auth_data(sdata, false);
2724 } else if (ieee80211_probe_auth(sdata)) {
2725 u8 bssid[ETH_ALEN];
2726
2727 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2728
2729 ieee80211_destroy_auth_data(sdata, false);
2730
2731 mutex_unlock(&ifmgd->mtx);
2732 cfg80211_send_auth_timeout(sdata->dev, bssid);
2733 mutex_lock(&ifmgd->mtx);
2734 }
2735 } else if (ifmgd->auth_data)
2736 run_again(ifmgd, ifmgd->auth_data->timeout);
2737
2738 if (ifmgd->assoc_data &&
2739 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2740 if (!ifmgd->assoc_data->have_beacon ||
2741 ieee80211_do_assoc(sdata)) {
2742 u8 bssid[ETH_ALEN];
2743
2744 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2745
2746 ieee80211_destroy_assoc_data(sdata, false);
2747
2748 mutex_unlock(&ifmgd->mtx);
2749 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2750 mutex_lock(&ifmgd->mtx);
2751 }
2752 } else if (ifmgd->assoc_data)
2753 run_again(ifmgd, ifmgd->assoc_data->timeout);
2754
b291ba11
JB		 2755 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2756 IEEE80211_STA_CONNECTION_POLL) &&
2757 ifmgd->associated) {
a43abf29 2758 u8 bssid[ETH_ALEN];
72a8a3ed 2759 int max_tries;
a43abf29 2760
0c1ad2ca 2761 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2762
72a8a3ed 2763 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2764 max_tries = max_nullfunc_tries;
72a8a3ed 2765 else
180205bd 2766 max_tries = max_probe_tries;
72a8a3ed 2767
4e5ff376
FF		 2768 /* ACK received for nullfunc probing frame */
2769 if (!ifmgd->probe_send_count)
2770 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2771 else if (ifmgd->nullfunc_failed) {
2772 if (ifmgd->probe_send_count < max_tries) {
2773#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2774 wiphy_debug(local->hw.wiphy,
2775 "%s: No ack for nullfunc frame to"
bfc31df3 2776 " AP %pM, try %d/%i\n",
04ac3c0e 2777 sdata->name, bssid,
bfc31df3 2778 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2779#endif
2780 ieee80211_mgd_probe_ap_send(sdata);
2781 } else {
2782#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2783 wiphy_debug(local->hw.wiphy,
2784 "%s: No ack for nullfunc frame to"
2785 " AP %pM, disconnecting.\n",
c658e5db 2786 sdata->name, bssid);
04ac3c0e 2787#endif
95acac61
JB		 2788 ieee80211_sta_connection_lost(sdata, bssid,
2789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2790 }
2791 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2792 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2793 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2794#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2795 wiphy_debug(local->hw.wiphy,
2796 "%s: Failed to send nullfunc to AP %pM"
2797 " after %dms, disconnecting.\n",
2798 sdata->name,
180205bd 2799 bssid, probe_wait_ms);
04ac3c0e 2800#endif
95acac61
JB		 2801 ieee80211_sta_connection_lost(sdata, bssid,
2802 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2803 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2804#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2805 wiphy_debug(local->hw.wiphy,
2806 "%s: No probe response from AP %pM"
bfc31df3 2807 " after %dms, try %d/%i\n",
b38afa87 2808 sdata->name,
180205bd 2809 bssid, probe_wait_ms,
bfc31df3 2810 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2811#endif
2812 ieee80211_mgd_probe_ap_send(sdata);
2813 } else {
b291ba11
JB		 2814 /*
2815 * We actually lost the connection ... or did we?
2816 * Let's make sure!
2817 */
b38afa87
BG		 2818 wiphy_debug(local->hw.wiphy,
2819 "%s: No probe response from AP %pM"
2820 " after %dms, disconnecting.\n",
2821 sdata->name,
180205bd 2822 bssid, probe_wait_ms);
04ac3c0e 2823
95acac61
JB		 2824 ieee80211_sta_connection_lost(sdata, bssid,
2825 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2826 }
2827 }
2828
77fdaa12 2829 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2830
2831 mutex_lock(&local->mtx);
2832 ieee80211_recalc_idle(local);
2833 mutex_unlock(&local->mtx);
f0706e82
JB		 2834}
2835
b291ba11
JB		 2836static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2837{
2838 struct ieee80211_sub_if_data *sdata =
2839 (struct ieee80211_sub_if_data *) data;
2840 struct ieee80211_local *local = sdata->local;
2841
2842 if (local->quiescing)
2843 return;
2844
1e4dcd01
JO		 2845 ieee80211_queue_work(&sdata->local->hw,
2846 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2847}
2848
2849static void ieee80211_sta_conn_mon_timer(unsigned long data)
2850{
2851 struct ieee80211_sub_if_data *sdata =
2852 (struct ieee80211_sub_if_data *) data;
2853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2854 struct ieee80211_local *local = sdata->local;
2855
2856 if (local->quiescing)
2857 return;
2858
42935eca 2859 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2860}
2861
2862static void ieee80211_sta_monitor_work(struct work_struct *work)
2863{
2864 struct ieee80211_sub_if_data *sdata =
2865 container_of(work, struct ieee80211_sub_if_data,
2866 u.mgd.monitor_work);
2867
2868 ieee80211_mgd_probe_ap(sdata, false);
2869}
2870
9c6bd790
JB		 2871static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2872{
494f1fe5
EP		 2873 u32 flags;
2874
ad935687 2875 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2876 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2877 IEEE80211_STA_CONNECTION_POLL);
ad935687 2878
b291ba11 2879 /* let's probe the connection once */
494f1fe5
EP		 2880 flags = sdata->local->hw.flags;
2881 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2882 ieee80211_queue_work(&sdata->local->hw,
2883 &sdata->u.mgd.monitor_work);
b291ba11 2884 /* and do all the other regular work too */
64592c8f 2885 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2886 }
9c6bd790 2887}
f0706e82 2888
5bb644a0
JB		 2889#ifdef CONFIG_PM
2890void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2891{
2892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2893
2894 /*
2895 * we need to use atomic bitops for the running bits
2896 * only because both timers might fire at the same
2897 * time -- the code here is properly synchronised.
2898 */
2899
d1f5b7a3
JB		 2900 cancel_work_sync(&ifmgd->request_smps_work);
2901
0ecfe806 2902 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2903 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2904 if (del_timer_sync(&ifmgd->timer))
2905 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2906
2907 cancel_work_sync(&ifmgd->chswitch_work);
2908 if (del_timer_sync(&ifmgd->chswitch_timer))
2909 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2910
b291ba11
JB		 2911 /* these will just be re-established on connection */
2912 del_timer_sync(&ifmgd->conn_mon_timer);
2913 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2914}
2915
2916void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2917{
2918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2919
676b58c2
RM		 2920 if (!ifmgd->associated)
2921 return;
2922
95acac61
JB		 2923 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2924 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2925 mutex_lock(&ifmgd->mtx);
2926 if (ifmgd->associated) {
2927#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2928 wiphy_debug(sdata->local->hw.wiphy,
2929 "%s: driver requested disconnect after resume.\n",
2930 sdata->name);
2931#endif
2932 ieee80211_sta_connection_lost(sdata,
2933 ifmgd->associated->bssid,
2934 WLAN_REASON_UNSPECIFIED);
2935 mutex_unlock(&ifmgd->mtx);
2936 return;
2937 }
2938 mutex_unlock(&ifmgd->mtx);
2939 }
2940
5bb644a0
JB		 2941 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2942 add_timer(&ifmgd->timer);
2943 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2944 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2945 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2946 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2947}
2948#endif
2949
9c6bd790
JB		 2950/* interface setup */
2951void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2952{
46900298 2953 struct ieee80211_if_managed *ifmgd;
988c0f72 2954
46900298 2955 ifmgd = &sdata->u.mgd;
b291ba11 2956 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2957 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2958 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2959 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2960 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2961 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2962 (unsigned long) sdata);
b291ba11
JB		 2963 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2964 (unsigned long) sdata);
2965 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2966 (unsigned long) sdata);
46900298 2967 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2968 (unsigned long) sdata);
9c6bd790 2969
ab1faead 2970 ifmgd->flags = 0;
1478acb3 2971 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2972 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2973 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2974
77fdaa12 2975 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2976
2977 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2978 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2979 else
2980 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2981}
2982
77fdaa12
JB		 2983/* scan finished notification */
2984void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2985{
77fdaa12 2986 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2987
77fdaa12
JB		 2988 /* Restart STA timers */
2989 rcu_read_lock();
2990 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2991 ieee80211_restart_sta_timer(sdata);
2992 rcu_read_unlock();
2993}
60f8b39c 2994
77fdaa12
JB		 2995int ieee80211_max_network_latency(struct notifier_block *nb,
2996 unsigned long data, void *dummy)
2997{
2998 s32 latency_usec = (s32) data;
2999 struct ieee80211_local *local =
3000 container_of(nb, struct ieee80211_local,
3001 network_latency_notifier);
1fa6f4af 3002
77fdaa12
JB		 3003 mutex_lock(&local->iflist_mtx);
3004 ieee80211_recalc_ps(local, latency_usec);
3005 mutex_unlock(&local->iflist_mtx);
dfe67012 3006
77fdaa12 3007 return 0;
9c6bd790
JB		 3008}
3009
a1cf775d 3010static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3011 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3012{
3013 struct ieee80211_local *local = sdata->local;
3014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3015 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3016 struct sta_info *sta;
3017 bool have_sta = false;
3018 int err;
24398e39
JB		 3019 int ht_cfreq;
3020 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3021 const u8 *ht_oper_ie;
3022 const struct ieee80211_ht_operation *ht_oper = NULL;
3023 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3024
3025 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3026 return -EINVAL;
3027
3028 if (assoc) {
3029 rcu_read_lock();
5d6a1b06 3030 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3031 rcu_read_unlock();
3032 }
3033
3034 if (!have_sta) {
5d6a1b06 3035 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3036 if (!sta)
3037 return -ENOMEM;
3038 }
3039
3040 mutex_lock(&local->mtx);
3041 ieee80211_recalc_idle(sdata->local);
3042 mutex_unlock(&local->mtx);
3043
3044 /* switch to the right channel */
24398e39
JB		 3045 sband = local->hw.wiphy->bands[cbss->channel->band];
3046
3047 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3048
3049 if (sband->ht_cap.ht_supported) {
3050 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3051 cbss->information_elements,
3052 cbss->len_information_elements);
3053 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3054 ht_oper = (void *)(ht_oper_ie + 2);
3055 }
3056
3057 if (ht_oper) {
3058 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3059 cbss->channel->band);
3060 /* check that channel matches the right operating channel */
3061 if (cbss->channel->center_freq != ht_cfreq) {
3062 /*
3063 * It's possible that some APs are confused here;
3064 * Netgear WNDR3700 sometimes reports 4 higher than
3065 * the actual channel in association responses, but
3066 * since we look at probe response/beacon data here
3067 * it should be OK.
3068 */
3069 printk(KERN_DEBUG
3070 "%s: Wrong control channel: center-freq: %d"
3071 " ht-cfreq: %d ht->primary_chan: %d"
3072 " band: %d. Disabling HT.\n",
3073 sdata->name, cbss->channel->center_freq,
3074 ht_cfreq, ht_oper->primary_chan,
3075 cbss->channel->band);
3076 ht_oper = NULL;
3077 }
3078 }
3079
3080 if (ht_oper) {
3081 channel_type = NL80211_CHAN_HT20;
3082
3083 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3084 switch (ht_oper->ht_param &
3085 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3086 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3087 channel_type = NL80211_CHAN_HT40PLUS;
3088 break;
3089 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3090 channel_type = NL80211_CHAN_HT40MINUS;
3091 break;
3092 }
3093 }
3094 }
3095
3096 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3097 /* can only fail due to HT40+/- mismatch */
3098 channel_type = NL80211_CHAN_HT20;
3099 printk(KERN_DEBUG
3100 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3101 sdata->name);
3102 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3103 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3104 channel_type));
3105 }
3106
5d6a1b06 3107 local->oper_channel = cbss->channel;
24398e39 3108 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3109
3110 if (!have_sta) {
5d6a1b06
JB		 3111 u32 rates = 0, basic_rates = 0;
3112 bool have_higher_than_11mbit;
3113 int min_rate = INT_MAX, min_rate_index = -1;
3114
5d6a1b06
JB		 3115 ieee80211_get_rates(sband, bss->supp_rates,
3116 bss->supp_rates_len,
3117 &rates, &basic_rates,
3118 &have_higher_than_11mbit,
3119 &min_rate, &min_rate_index);
3120
3121 /*
3122 * This used to be a workaround for basic rates missing
3123 * in the association response frame. Now that we no
3124 * longer use the basic rates from there, it probably
3125 * doesn't happen any more, but keep the workaround so
3126 * in case some *other* APs are buggy in different ways
3127 * we can connect -- with a warning.
3128 */
3129 if (!basic_rates && min_rate_index >= 0) {
3130 printk(KERN_DEBUG
3131 "%s: No basic rates, using min rate instead.\n",
3132 sdata->name);
3133 basic_rates = BIT(min_rate_index);
3134 }
3135
3136 sta->sta.supp_rates[cbss->channel->band] = rates;
3137 sdata->vif.bss_conf.basic_rates = basic_rates;
3138
3139 /* cf. IEEE 802.11 9.2.12 */
3140 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3141 have_higher_than_11mbit)
3142 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3143 else
3144 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3145
3146 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3147
3148 /* tell driver about BSSID and basic rates */
3149 ieee80211_bss_info_change_notify(sdata,
3150 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3151
3152 if (assoc)
3153 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3154
3155 err = sta_info_insert(sta);
3156 sta = NULL;
3157 if (err) {
3158 printk(KERN_DEBUG
3159 "%s: failed to insert STA entry for the AP (error %d)\n",
3160 sdata->name, err);
3161 return err;
3162 }
3163 } else
b203ca39 3164 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3165
3166 return 0;
3167}
3168
77fdaa12
JB		 3169/* config hooks */
3170int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3171 struct cfg80211_auth_request *req)
9c6bd790 3172{
66e67e41
JB		 3173 struct ieee80211_local *local = sdata->local;
3174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3175 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3176 u16 auth_alg;
66e67e41
JB		 3177 int err;
3178
3179 /* prepare auth data structure */
9c6bd790 3180
77fdaa12
JB		 3181 switch (req->auth_type) {
3182 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3183 auth_alg = WLAN_AUTH_OPEN;
3184 break;
3185 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3186 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3187 return -EOPNOTSUPP;
77fdaa12
JB		 3188 auth_alg = WLAN_AUTH_SHARED_KEY;
3189 break;
3190 case NL80211_AUTHTYPE_FT:
3191 auth_alg = WLAN_AUTH_FT;
3192 break;
3193 case NL80211_AUTHTYPE_NETWORK_EAP:
3194 auth_alg = WLAN_AUTH_LEAP;
3195 break;
3196 default:
3197 return -EOPNOTSUPP;
60f8b39c 3198 }
77fdaa12 3199
66e67e41
JB		 3200 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3201 if (!auth_data)
9c6bd790 3202 return -ENOMEM;
77fdaa12 3203
66e67e41 3204 auth_data->bss = req->bss;
77fdaa12
JB		 3205
3206 if (req->ie && req->ie_len) {
66e67e41
JB		 3207 memcpy(auth_data->ie, req->ie, req->ie_len);
3208 auth_data->ie_len = req->ie_len;
9c6bd790 3209 }
77fdaa12 3210
fffd0934 3211 if (req->key && req->key_len) {
66e67e41
JB		 3212 auth_data->key_len = req->key_len;
3213 auth_data->key_idx = req->key_idx;
3214 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3215 }
3216
66e67e41 3217 auth_data->algorithm = auth_alg;
60f8b39c 3218
66e67e41 3219 /* try to authenticate/probe */
2a33bee2 3220
66e67e41 3221 mutex_lock(&ifmgd->mtx);
2a33bee2 3222
66e67e41
JB		 3223 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3224 ifmgd->assoc_data) {
3225 err = -EBUSY;
3226 goto err_free;
2a33bee2
GE		 3227 }
3228
66e67e41
JB		 3229 if (ifmgd->auth_data)
3230 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3231
66e67e41
JB		 3232 /* prep auth_data so we don't go into idle on disassoc */
3233 ifmgd->auth_data = auth_data;
af6b6374 3234
66e67e41 3235 if (ifmgd->associated)
37ad3888 3236 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3237
66e67e41
JB		 3238 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3239 sdata->name, req->bss->bssid);
e5b900d2 3240
a1cf775d
JB		 3241 err = ieee80211_prep_connection(sdata, req->bss, false);
3242 if (err)
66e67e41 3243 goto err_clear;
af6b6374 3244
66e67e41
JB		 3245 err = ieee80211_probe_auth(sdata);
3246 if (err) {
66e67e41
JB		 3247 sta_info_destroy_addr(sdata, req->bss->bssid);
3248 goto err_clear;
3249 }
3250
3251 /* hold our own reference */
3252 cfg80211_ref_bss(auth_data->bss);
3253 err = 0;
3254 goto out_unlock;
3255
3256 err_clear:
3257 ifmgd->auth_data = NULL;
3258 err_free:
3259 kfree(auth_data);
3260 out_unlock:
3261 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3262
66e67e41 3263 return err;
af6b6374
JB		 3264}
3265
77fdaa12
JB		 3266int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3267 struct cfg80211_assoc_request *req)
f0706e82 3268{
66e67e41 3269 struct ieee80211_local *local = sdata->local;
77fdaa12 3270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3271 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3272 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3273 struct ieee80211_supported_band *sband;
66e67e41 3274 const u8 *ssidie;
2a33bee2 3275 int i, err;
f0706e82 3276
66e67e41
JB		 3277 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3278 if (!ssidie)
3279 return -EINVAL;
3280
3281 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3282 if (!assoc_data)
3283 return -ENOMEM;
3284
77fdaa12 3285 mutex_lock(&ifmgd->mtx);
9c87ba67 3286
66e67e41 3287 if (ifmgd->associated)
37ad3888 3288 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3289
3290 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3291 err = -EBUSY;
3292 goto err_free;
af6b6374 3293 }
77fdaa12 3294
66e67e41
JB		 3295 if (ifmgd->assoc_data) {
3296 err = -EBUSY;
3297 goto err_free;
3298 }
77fdaa12 3299
66e67e41
JB		 3300 if (ifmgd->auth_data) {
3301 bool match;
3302
3303 /* keep sta info, bssid if matching */
b203ca39 3304 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3305 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3306 }
3307
66e67e41
JB		 3308 /* prepare assoc data */
3309
77fdaa12 3310 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3311 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3312
d8ec4433
JO		 3313 ifmgd->beacon_crc_valid = false;
3314
de5036aa
JB		 3315 /*
3316 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3317 * We still associate in non-HT mode (11a/b/g) if any one of these
3318 * ciphers is configured as pairwise.
3319 * We can set this to true for non-11n hardware, that'll be checked
3320 * separately along with the peer capabilities.
3321 */
77fdaa12
JB		 3322 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3323 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3324 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3325 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3326 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3327
ef96a842
BG		 3328 if (req->flags & ASSOC_REQ_DISABLE_HT)
3329 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3330
4e74bfdb
JB		 3331 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3332 sband = local->hw.wiphy->bands[req->bss->channel->band];
3333 if (!sband->ht_cap.ht_supported ||
32c5057b 3334 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
4e74bfdb
JB		 3335 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3336
ef96a842
BG		 3337 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3338 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3339 sizeof(ifmgd->ht_capa_mask));
3340
77fdaa12 3341 if (req->ie && req->ie_len) {
66e67e41
JB		 3342 memcpy(assoc_data->ie, req->ie, req->ie_len);
3343 assoc_data->ie_len = req->ie_len;
3344 }
f679f65d 3345
66e67e41 3346 assoc_data->bss = req->bss;
f679f65d 3347
af6b6374
JB		 3348 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3349 if (ifmgd->powersave)
3350 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3351 else
3352 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3353 } else
3354 ifmgd->ap_smps = ifmgd->req_smps;
3355
66e67e41 3356 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3357 assoc_data->wmm = bss->wmm_used &&
3358 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3359 assoc_data->supp_rates = bss->supp_rates;
3360 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3361 assoc_data->ht_operation_ie =
3362 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3363
ab13315a
KV		 3364 if (bss->wmm_used && bss->uapsd_supported &&
3365 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3366 assoc_data->uapsd = true;
ab13315a
KV		 3367 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3368 } else {
76f0303d 3369 assoc_data->uapsd = false;
ab13315a
KV		 3370 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3371 }
3372
66e67e41
JB		 3373 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3374 assoc_data->ssid_len = ssidie[1];
63f170e0 3375
77fdaa12 3376 if (req->prev_bssid)
66e67e41 3377 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3378
3379 if (req->use_mfp) {
3380 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3381 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3382 } else {
3383 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3384 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3385 }
3386
3387 if (req->crypto.control_port)
3388 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3389 else
3390 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3391
a621fa4d
JB		 3392 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3393 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3394
66e67e41
JB		 3395 /* kick off associate process */
3396
3397 ifmgd->assoc_data = assoc_data;
3398
a1cf775d
JB		 3399 err = ieee80211_prep_connection(sdata, req->bss, true);
3400 if (err)
3401 goto err_clear;
66e67e41
JB		 3402
3403 if (!bss->dtim_period &&
3404 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3405 /*
3406 * Wait up to one beacon interval ...
3407 * should this be more if we miss one?
3408 */
3409 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3410 sdata->name, ifmgd->bssid);
3f9768a5 3411 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3412 } else {
3413 assoc_data->have_beacon = true;
3414 assoc_data->sent_assoc = false;
3415 assoc_data->timeout = jiffies;
3416 }
3417 run_again(ifmgd, assoc_data->timeout);
3418
fcff4f10
PS		 3419 if (bss->corrupt_data) {
3420 char *corrupt_type = "data";
3421 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3422 if (bss->corrupt_data &
3423 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3424 corrupt_type = "beacon and probe response";
3425 else
3426 corrupt_type = "beacon";
3427 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3428 corrupt_type = "probe response";
3429 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3430 sdata->name, corrupt_type);
3431 }
3432
66e67e41
JB		 3433 err = 0;
3434 goto out;
3435 err_clear:
3436 ifmgd->assoc_data = NULL;
3437 err_free:
3438 kfree(assoc_data);
3439 out:
3440 mutex_unlock(&ifmgd->mtx);
3441
3442 return err;
f0706e82
JB		 3443}
3444
77fdaa12 3445int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3446 struct cfg80211_deauth_request *req)
f0706e82 3447{
46900298 3448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3449 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3450
77fdaa12
JB		 3451 mutex_lock(&ifmgd->mtx);
3452
37ad3888 3453 if (ifmgd->auth_data) {
66e67e41 3454 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3455 mutex_unlock(&ifmgd->mtx);
66e67e41 3456 return 0;
af6b6374 3457 }
77fdaa12 3458
37ad3888
JB		 3459 printk(KERN_DEBUG
3460 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3461 sdata->name, req->bssid, req->reason_code);
0ff71613 3462
37ad3888 3463 if (ifmgd->associated &&
b203ca39 3464 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3465 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3466 req->reason_code, true, frame_buf);
37ad3888
JB		 3467 else
3468 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3469 IEEE80211_STYPE_DEAUTH,
3470 req->reason_code, true,
3471 frame_buf);
3472 mutex_unlock(&ifmgd->mtx);
3473
5fef7dbc 3474 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3475
7da7cc1d 3476 mutex_lock(&sdata->local->mtx);
bc83b681 3477 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3478 mutex_unlock(&sdata->local->mtx);
bc83b681 3479
f0706e82
JB		 3480 return 0;
3481}
84363e6e 3482
77fdaa12 3483int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3484 struct cfg80211_disassoc_request *req)
9c6bd790 3485{
77fdaa12 3486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3487 u8 bssid[ETH_ALEN];
5fef7dbc 3488 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3489
77fdaa12 3490 mutex_lock(&ifmgd->mtx);
10f644a4 3491
8d8b261a
JB		 3492 /*
3493 * cfg80211 should catch this ... but it's racy since
3494 * we can receive a disassoc frame, process it, hand it
3495 * to cfg80211 while that's in a locked section already
3496 * trying to tell us that the user wants to disconnect.
3497 */
0c1ad2ca 3498 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3499 mutex_unlock(&ifmgd->mtx);
3500 return -ENOLINK;
3501 }
3502
0ff71613 3503 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3504 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3505
e69e95db 3506 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3507 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3508 req->reason_code, !req->local_state_change,
3509 frame_buf);
77fdaa12 3510 mutex_unlock(&ifmgd->mtx);
10f644a4 3511
5fef7dbc 3512 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3513
7da7cc1d 3514 mutex_lock(&sdata->local->mtx);
bc83b681 3515 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3516 mutex_unlock(&sdata->local->mtx);
bc83b681 3517
10f644a4
JB		 3518 return 0;
3519}
026331c4 3520
afa762f6 3521void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3522{
3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3524
3525 mutex_lock(&ifmgd->mtx);
3526 if (ifmgd->assoc_data)
3527 ieee80211_destroy_assoc_data(sdata, false);
3528 if (ifmgd->auth_data)
3529 ieee80211_destroy_auth_data(sdata, false);
3530 del_timer_sync(&ifmgd->timer);
3531 mutex_unlock(&ifmgd->mtx);
3532}
3533
a97c13c3
JO		 3534void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3535 enum nl80211_cqm_rssi_threshold_event rssi_event,
3536 gfp_t gfp)
3537{
3538 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3539
b5878a2d
JB		 3540 trace_api_cqm_rssi_notify(sdata, rssi_event);
3541
a97c13c3
JO		 3542 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3543}
3544EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3545
3546unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3547{
3548 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3549 return sdata->dev->operstate;
3550}
3551EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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