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mac80211: remove queue stop on rate control update
[mirror_ubuntu-zesty-kernel.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 ||
213 (disable_40 != !!(sta->sta.ht_cap.cap &
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
JB		 221 rate_control_rate_update(local, sband, sta,
222 IEEE80211_RC_HT_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
af6b6374 1137 if (local->hw.queues < 4)
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;
1450
1451 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1452 IEEE80211_STA_CONNECTION_POLL)))
1453 return;
1454
1455 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1456 IEEE80211_STA_BEACON_POLL);
1457 mutex_lock(&sdata->local->iflist_mtx);
1458 ieee80211_recalc_ps(sdata->local, -1);
1459 mutex_unlock(&sdata->local->iflist_mtx);
1460
1461 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1462 return;
1463
1464 /*
1465 * We've received a probe response, but are not sure whether
1466 * we have or will be receiving any beacons or data, so let's
1467 * schedule the timers again, just in case.
1468 */
1469 ieee80211_sta_reset_beacon_monitor(sdata);
1470
1471 mod_timer(&ifmgd->conn_mon_timer,
1472 round_jiffies_up(jiffies +
1473 IEEE80211_CONNECTION_IDLE_TIME));
1474}
1475
1476void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1477 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1478{
75706d0e 1479 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1480 return;
1481
04ac3c0e
FF		 1482 if (ack)
1483 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1484
1485 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1486 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1487 if (ack)
1488 sdata->u.mgd.probe_send_count = 0;
1489 else
1490 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1491 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1492 }
1493}
1494
a43abf29
ML		 1495static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1496{
1497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1498 const u8 *ssid;
f01a067d 1499 u8 *dst = ifmgd->associated->bssid;
180205bd 1500 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1501
1502 /*
1503 * Try sending broadcast probe requests for the last three
1504 * probe requests after the first ones failed since some
1505 * buggy APs only support broadcast probe requests.
1506 */
1507 if (ifmgd->probe_send_count >= unicast_limit)
1508 dst = NULL;
a43abf29 1509
4e5ff376
FF		 1510 /*
1511 * When the hardware reports an accurate Tx ACK status, it's
1512 * better to send a nullfunc frame instead of a probe request,
1513 * as it will kick us off the AP quickly if we aren't associated
1514 * anymore. The timeout will be reset if the frame is ACKed by
1515 * the AP.
1516 */
04ac3c0e
FF		 1517 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1518 ifmgd->nullfunc_failed = false;
4e5ff376 1519 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1520 } else {
4e5ff376 1521 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1522 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1523 (u32) -1, true, false);
4e5ff376 1524 }
a43abf29
ML		 1525
1526 ifmgd->probe_send_count++;
180205bd 1527 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1528 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1529 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1530 drv_flush(sdata->local, false);
a43abf29
ML		 1531}
1532
b291ba11
JB		 1533static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1534 bool beacon)
04de8381 1535{
04de8381 1536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1537 bool already = false;
34bfc411 1538
9607e6b6 1539 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1540 return;
1541
91a3bd76
LR		 1542 if (sdata->local->scanning)
1543 return;
1544
b8bc4b0a
JB		 1545 if (sdata->local->tmp_channel)
1546 return;
1547
77fdaa12
JB		 1548 mutex_lock(&ifmgd->mtx);
1549
1550 if (!ifmgd->associated)
1551 goto out;
1552
a860402d 1553#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1554 if (beacon && net_ratelimit())
1555 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1556 "- sending probe request\n", sdata->name);
a860402d 1557#endif
04de8381 1558
b291ba11
JB		 1559 /*
1560 * The driver/our work has already reported this event or the
1561 * connection monitoring has kicked in and we have already sent
1562 * a probe request. Or maybe the AP died and the driver keeps
1563 * reporting until we disassociate...
1564 *
1565 * In either case we have to ignore the current call to this
1566 * function (except for setting the correct probe reason bit)
1567 * because otherwise we would reset the timer every time and
1568 * never check whether we received a probe response!
1569 */
1570 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1571 IEEE80211_STA_CONNECTION_POLL))
1572 already = true;
1573
1574 if (beacon)
1575 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1576 else
1577 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1578
1579 if (already)
1580 goto out;
1581
4e751843
JB		 1582 mutex_lock(&sdata->local->iflist_mtx);
1583 ieee80211_recalc_ps(sdata->local, -1);
1584 mutex_unlock(&sdata->local->iflist_mtx);
1585
a43abf29
ML		 1586 ifmgd->probe_send_count = 0;
1587 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1588 out:
1589 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1590}
1591
a619a4c0
JO		 1592struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1593 struct ieee80211_vif *vif)
1594{
1595 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1597 struct sk_buff *skb;
1598 const u8 *ssid;
1599
1600 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1601 return NULL;
1602
1603 ASSERT_MGD_MTX(ifmgd);
1604
1605 if (!ifmgd->associated)
1606 return NULL;
1607
1608 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1609 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1610 (u32) -1, ssid + 2, ssid[1],
1611 NULL, 0, true);
a619a4c0
JO		 1612
1613 return skb;
1614}
1615EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1616
1e4dcd01
JO		 1617static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1618{
1619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1620 struct ieee80211_local *local = sdata->local;
1621 u8 bssid[ETH_ALEN];
5fef7dbc 1622 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1623
1624 mutex_lock(&ifmgd->mtx);
1625 if (!ifmgd->associated) {
1626 mutex_unlock(&ifmgd->mtx);
1627 return;
1628 }
1629
1630 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1631
180205bd
BG		 1632 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1633 sdata->name, bssid);
1e4dcd01 1634
37ad3888
JB		 1635 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1637 false, frame_buf);
1e4dcd01 1638 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1639
1e4dcd01
JO		 1640 /*
1641 * must be outside lock due to cfg80211,
1642 * but that's not a problem.
1643 */
5fef7dbc 1644 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1645
1646 mutex_lock(&local->mtx);
1647 ieee80211_recalc_idle(local);
1648 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1649}
1650
1651void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1652{
1653 struct ieee80211_sub_if_data *sdata =
1654 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1655 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1657 struct sta_info *sta;
1658
1659 if (ifmgd->associated) {
30fa9047 1660 rcu_read_lock();
a85e1d55
PS		 1661 sta = sta_info_get(sdata, ifmgd->bssid);
1662 if (sta)
1663 sta->beacon_loss_count++;
30fa9047 1664 rcu_read_unlock();
a85e1d55 1665 }
b291ba11 1666
1e4dcd01
JO		 1667 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1668 __ieee80211_connection_loss(sdata);
1669 else
1670 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1671}
1672
04de8381
KV		 1673void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1674{
1675 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1676 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1677
b5878a2d
JB		 1678 trace_api_beacon_loss(sdata);
1679
1e4dcd01
JO		 1680 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1681 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1682}
1683EXPORT_SYMBOL(ieee80211_beacon_loss);
1684
1e4dcd01
JO		 1685void ieee80211_connection_loss(struct ieee80211_vif *vif)
1686{
1687 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1688 struct ieee80211_hw *hw = &sdata->local->hw;
1689
b5878a2d
JB		 1690 trace_api_connection_loss(sdata);
1691
1e4dcd01
JO		 1692 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1693 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1694}
1695EXPORT_SYMBOL(ieee80211_connection_loss);
1696
1697
66e67e41
JB		 1698static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1699 bool assoc)
1700{
1701 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1702
1703 lockdep_assert_held(&sdata->u.mgd.mtx);
1704
66e67e41
JB		 1705 if (!assoc) {
1706 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1707
1708 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1709 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1710 }
1711
1712 cfg80211_put_bss(auth_data->bss);
1713 kfree(auth_data);
1714 sdata->u.mgd.auth_data = NULL;
1715}
1716
1717static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1718 struct ieee80211_mgmt *mgmt, size_t len)
1719{
1720 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1721 u8 *pos;
1722 struct ieee802_11_elems elems;
1723
1724 pos = mgmt->u.auth.variable;
1725 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1726 if (!elems.challenge)
1727 return;
1728 auth_data->expected_transaction = 4;
1729 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1730 elems.challenge - 2, elems.challenge_len + 2,
1731 auth_data->bss->bssid, auth_data->bss->bssid,
1732 auth_data->key, auth_data->key_len,
1733 auth_data->key_idx);
1734}
1735
1736static enum rx_mgmt_action __must_check
1737ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1738 struct ieee80211_mgmt *mgmt, size_t len)
1739{
1740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1741 u8 bssid[ETH_ALEN];
1742 u16 auth_alg, auth_transaction, status_code;
1743 struct sta_info *sta;
1744
1745 lockdep_assert_held(&ifmgd->mtx);
1746
1747 if (len < 24 + 6)
1748 return RX_MGMT_NONE;
1749
1750 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1751 return RX_MGMT_NONE;
1752
1753 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1754
888d04df 1755 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1756 return RX_MGMT_NONE;
1757
1758 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1759 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1760 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1761
1762 if (auth_alg != ifmgd->auth_data->algorithm ||
1763 auth_transaction != ifmgd->auth_data->expected_transaction)
1764 return RX_MGMT_NONE;
1765
1766 if (status_code != WLAN_STATUS_SUCCESS) {
1767 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1768 sdata->name, mgmt->sa, status_code);
1769 goto out;
1770 }
1771
1772 switch (ifmgd->auth_data->algorithm) {
1773 case WLAN_AUTH_OPEN:
1774 case WLAN_AUTH_LEAP:
1775 case WLAN_AUTH_FT:
1776 break;
1777 case WLAN_AUTH_SHARED_KEY:
1778 if (ifmgd->auth_data->expected_transaction != 4) {
1779 ieee80211_auth_challenge(sdata, mgmt, len);
1780 /* need another frame */
1781 return RX_MGMT_NONE;
1782 }
1783 break;
1784 default:
1785 WARN_ONCE(1, "invalid auth alg %d",
1786 ifmgd->auth_data->algorithm);
1787 return RX_MGMT_NONE;
1788 }
1789
1790 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1791 out:
66e67e41
JB		 1792 ifmgd->auth_data->done = true;
1793 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1794 run_again(ifmgd, ifmgd->auth_data->timeout);
1795
1796 /* move station state to auth */
1797 mutex_lock(&sdata->local->sta_mtx);
1798 sta = sta_info_get(sdata, bssid);
1799 if (!sta) {
1800 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1801 goto out_err;
1802 }
1803 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1804 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1805 sdata->name, bssid);
1806 goto out_err;
1807 }
1808 mutex_unlock(&sdata->local->sta_mtx);
1809
1810 return RX_MGMT_CFG80211_RX_AUTH;
1811 out_err:
1812 mutex_unlock(&sdata->local->sta_mtx);
1813 /* ignore frame -- wait for timeout */
1814 return RX_MGMT_NONE;
1815}
1816
1817
77fdaa12
JB		 1818static enum rx_mgmt_action __must_check
1819ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1820 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1821{
46900298 1822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1823 const u8 *bssid = NULL;
f0706e82
JB		 1824 u16 reason_code;
1825
66e67e41
JB		 1826 lockdep_assert_held(&ifmgd->mtx);
1827
f4ea83dd 1828 if (len < 24 + 2)
77fdaa12 1829 return RX_MGMT_NONE;
f0706e82 1830
66e67e41 1831 if (!ifmgd->associated ||
888d04df 1832 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1833 return RX_MGMT_NONE;
77fdaa12 1834
0c1ad2ca 1835 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1836
1837 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1838
77fdaa12 1839 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1840 sdata->name, bssid, reason_code);
77fdaa12 1841
37ad3888
JB		 1842 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1843
7da7cc1d 1844 mutex_lock(&sdata->local->mtx);
63f170e0 1845 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1846 mutex_unlock(&sdata->local->mtx);
f0706e82 1847
77fdaa12 1848 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1849}
1850
1851
77fdaa12
JB		 1852static enum rx_mgmt_action __must_check
1853ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1854 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1855{
46900298 1856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1857 u16 reason_code;
1858
66e67e41 1859 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1860
66e67e41 1861 if (len < 24 + 2)
77fdaa12
JB		 1862 return RX_MGMT_NONE;
1863
66e67e41 1864 if (!ifmgd->associated ||
888d04df 1865 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1866 return RX_MGMT_NONE;
f0706e82
JB		 1867
1868 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1869
0ff71613 1870 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1871 sdata->name, mgmt->sa, reason_code);
f0706e82 1872
37ad3888
JB		 1873 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1874
7da7cc1d 1875 mutex_lock(&sdata->local->mtx);
bc83b681 1876 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1877 mutex_unlock(&sdata->local->mtx);
37ad3888 1878
77fdaa12 1879 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1880}
1881
c74d084f
CL		 1882static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1883 u8 *supp_rates, unsigned int supp_rates_len,
1884 u32 *rates, u32 *basic_rates,
1885 bool *have_higher_than_11mbit,
1886 int *min_rate, int *min_rate_index)
1887{
1888 int i, j;
1889
1890 for (i = 0; i < supp_rates_len; i++) {
1891 int rate = (supp_rates[i] & 0x7f) * 5;
1892 bool is_basic = !!(supp_rates[i] & 0x80);
1893
1894 if (rate > 110)
1895 *have_higher_than_11mbit = true;
1896
1897 /*
1898 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1899 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1900 *
1901 * Note: Even through the membership selector and the basic
1902 * rate flag share the same bit, they are not exactly
1903 * the same.
1904 */
1905 if (!!(supp_rates[i] & 0x80) &&
1906 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1907 continue;
1908
1909 for (j = 0; j < sband->n_bitrates; j++) {
1910 if (sband->bitrates[j].bitrate == rate) {
1911 *rates |= BIT(j);
1912 if (is_basic)
1913 *basic_rates |= BIT(j);
1914 if (rate < *min_rate) {
1915 *min_rate = rate;
1916 *min_rate_index = j;
1917 }
1918 break;
1919 }
1920 }
1921 }
1922}
f0706e82 1923
66e67e41
JB		 1924static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1925 bool assoc)
1926{
1927 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1928
1929 lockdep_assert_held(&sdata->u.mgd.mtx);
1930
66e67e41
JB		 1931 if (!assoc) {
1932 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1933
1934 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1935 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1936 }
1937
1938 kfree(assoc_data);
1939 sdata->u.mgd.assoc_data = NULL;
1940}
1941
1942static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1943 struct cfg80211_bss *cbss,
af6b6374 1944 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1945{
46900298 1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1947 struct ieee80211_local *local = sdata->local;
8318d78a 1948 struct ieee80211_supported_band *sband;
f0706e82 1949 struct sta_info *sta;
af6b6374 1950 u8 *pos;
af6b6374 1951 u16 capab_info, aid;
f0706e82 1952 struct ieee802_11_elems elems;
bda3933a 1953 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1954 u32 changed = 0;
c74d084f 1955 int err;
f0706e82 1956
af6b6374 1957 /* AssocResp and ReassocResp have identical structure */
f0706e82 1958
f0706e82 1959 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1960 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1961
1dd84aa2 1962 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1963 printk(KERN_DEBUG
1964 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1965 sdata->name, aid);
1dd84aa2
JB		 1966 aid &= ~(BIT(15) | BIT(14));
1967
05cb9108
JB		 1968 ifmgd->broken_ap = false;
1969
1970 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1971 printk(KERN_DEBUG
1972 "%s: invalid AID value %d (out of range), turn off PS\n",
1973 sdata->name, aid);
1974 aid = 0;
1975 ifmgd->broken_ap = true;
1976 }
1977
af6b6374
JB		 1978 pos = mgmt->u.assoc_resp.variable;
1979 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1980
f0706e82
JB		 1981 if (!elems.supp_rates) {
1982 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1983 sdata->name);
af6b6374 1984 return false;
f0706e82
JB		 1985 }
1986
46900298 1987 ifmgd->aid = aid;
f0706e82 1988
2a33bee2
GE		 1989 mutex_lock(&sdata->local->sta_mtx);
1990 /*
1991 * station info was already allocated and inserted before
1992 * the association and should be available to us
1993 */
7852e361 1994 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 1995 if (WARN_ON(!sta)) {
1996 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1997 return false;
77fdaa12 1998 }
05e5e883 1999
66e67e41 2000 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2001
ab1faead 2002 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2003 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2004 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2005
64f68e5d
JB		 2006 sta->supports_40mhz =
2007 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2008
4b7679a5 2009 rate_control_rate_init(sta);
f0706e82 2010
46900298 2011 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2012 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2013
ddf4ac53 2014 if (elems.wmm_param)
c2c98fde 2015 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2016
c8987876
JB		 2017 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2018 if (!err)
2019 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2020 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2021 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2022 if (err) {
2023 printk(KERN_DEBUG
2024 "%s: failed to move station %pM to desired state\n",
2025 sdata->name, sta->sta.addr);
2026 WARN_ON(__sta_info_destroy(sta));
2027 mutex_unlock(&sdata->local->sta_mtx);
2028 return false;
2029 }
2030
7852e361 2031 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2032
f2176d72
JO		 2033 /*
2034 * Always handle WMM once after association regardless
2035 * of the first value the AP uses. Setting -1 here has
2036 * that effect because the AP values is an unsigned
2037 * 4-bit value.
2038 */
2039 ifmgd->wmm_last_param_set = -1;
2040
ddf4ac53 2041 if (elems.wmm_param)
4ced3f74 2042 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2043 elems.wmm_param_len);
aa837e1d 2044 else
3abead59
JB		 2045 ieee80211_set_wmm_default(sdata, false);
2046 changed |= BSS_CHANGED_QOS;
f0706e82 2047
074d46d1 2048 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2049 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2050 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2051 cbss->bssid, false);
ae5eb026 2052
60f8b39c
JB		 2053 /* set AID and assoc capability,
2054 * ieee80211_set_associated() will tell the driver */
2055 bss_conf->aid = aid;
2056 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2057 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2058
d524215f
FF		 2059 /*
2060 * If we're using 4-addr mode, let the AP know that we're
2061 * doing so, so that it can create the STA VLAN on its side
2062 */
2063 if (ifmgd->use_4addr)
2064 ieee80211_send_4addr_nullfunc(local, sdata);
2065
15b7b062 2066 /*
b291ba11
JB		 2067 * Start timer to probe the connection to the AP now.
2068 * Also start the timer that will detect beacon loss.
15b7b062 2069 */
b291ba11 2070 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2071 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2072
af6b6374 2073 return true;
f0706e82
JB		 2074}
2075
66e67e41
JB		 2076static enum rx_mgmt_action __must_check
2077ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2078 struct ieee80211_mgmt *mgmt, size_t len,
2079 struct cfg80211_bss **bss)
2080{
2081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2082 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2083 u16 capab_info, status_code, aid;
2084 struct ieee802_11_elems elems;
2085 u8 *pos;
2086 bool reassoc;
2087
2088 lockdep_assert_held(&ifmgd->mtx);
2089
2090 if (!assoc_data)
2091 return RX_MGMT_NONE;
888d04df 2092 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2093 return RX_MGMT_NONE;
2094
2095 /*
2096 * AssocResp and ReassocResp have identical structure, so process both
2097 * of them in this function.
2098 */
2099
2100 if (len < 24 + 6)
2101 return RX_MGMT_NONE;
2102
2103 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2104 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2105 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2106 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2107
2108 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2109 "status=%d aid=%d)\n",
2110 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2111 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2112
2113 pos = mgmt->u.assoc_resp.variable;
2114 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2115
2116 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2117 elems.timeout_int && elems.timeout_int_len == 5 &&
2118 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2119 u32 tu, ms;
2120 tu = get_unaligned_le32(elems.timeout_int + 1);
2121 ms = tu * 1024 / 1000;
2122 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2123 "comeback duration %u TU (%u ms)\n",
2124 sdata->name, mgmt->sa, tu, ms);
2125 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2126 if (ms > IEEE80211_ASSOC_TIMEOUT)
2127 run_again(ifmgd, assoc_data->timeout);
2128 return RX_MGMT_NONE;
2129 }
2130
2131 *bss = assoc_data->bss;
2132
2133 if (status_code != WLAN_STATUS_SUCCESS) {
2134 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2135 sdata->name, mgmt->sa, status_code);
2136 ieee80211_destroy_assoc_data(sdata, false);
2137 } else {
2138 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2139
66e67e41
JB		 2140 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2141 /* oops -- internal error -- send timeout for now */
79ebfb85 2142 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2143 sta_info_destroy_addr(sdata, mgmt->bssid);
2144 cfg80211_put_bss(*bss);
2145 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2146 }
79ebfb85
JB		 2147
2148 /*
2149 * destroy assoc_data afterwards, as otherwise an idle
2150 * recalc after assoc_data is NULL but before associated
2151 * is set can cause the interface to go idle
2152 */
2153 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2154 }
2155
2156 return RX_MGMT_CFG80211_RX_ASSOC;
2157}
98c8fccf
JB		 2158static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2159 struct ieee80211_mgmt *mgmt,
2160 size_t len,
2161 struct ieee80211_rx_status *rx_status,
2162 struct ieee802_11_elems *elems,
2163 bool beacon)
2164{
2165 struct ieee80211_local *local = sdata->local;
2166 int freq;
c2b13452 2167 struct ieee80211_bss *bss;
98c8fccf 2168 struct ieee80211_channel *channel;
56007a02
JB		 2169 bool need_ps = false;
2170
66e67e41 2171 if (sdata->u.mgd.associated &&
888d04df
FF		 2172 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2173 == 0) {
56007a02
JB		 2174 bss = (void *)sdata->u.mgd.associated->priv;
2175 /* not previously set so we may need to recalc */
2176 need_ps = !bss->dtim_period;
2177 }
98c8fccf
JB		 2178
2179 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2180 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2181 rx_status->band);
98c8fccf
JB		 2182 else
2183 freq = rx_status->freq;
2184
2185 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2186
2187 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2188 return;
2189
98c8fccf 2190 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2191 channel, beacon);
77fdaa12
JB		 2192 if (bss)
2193 ieee80211_rx_bss_put(local, bss);
2194
2195 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2196 return;
2197
56007a02
JB		 2198 if (need_ps) {
2199 mutex_lock(&local->iflist_mtx);
2200 ieee80211_recalc_ps(local, -1);
2201 mutex_unlock(&local->iflist_mtx);
2202 }
2203
c481ec97 2204 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2205 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2206 ETH_ALEN) == 0)) {
c481ec97
S		 2207 struct ieee80211_channel_sw_ie *sw_elem =
2208 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2209 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2210 bss, rx_status->mactime);
c481ec97 2211 }
f0706e82
JB		 2212}
2213
2214
f698d856 2215static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2216 struct sk_buff *skb)
f0706e82 2217{
af6b6374 2218 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2219 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2220 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2221 size_t baselen, len = skb->len;
ae6a44e3
EK		 2222 struct ieee802_11_elems elems;
2223
15b7b062
KV		 2224 ifmgd = &sdata->u.mgd;
2225
77fdaa12
JB		 2226 ASSERT_MGD_MTX(ifmgd);
2227
888d04df 2228 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2229 return; /* ignore ProbeResp to foreign address */
2230
ae6a44e3
EK		 2231 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2232 if (baselen > len)
2233 return;
2234
2235 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2236 &elems);
2237
98c8fccf 2238 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2239
77fdaa12 2240 if (ifmgd->associated &&
888d04df 2241 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2242 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2243
2244 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2245 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2246 == 0) {
66e67e41
JB		 2247 /* got probe response, continue with auth */
2248 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2249 ifmgd->auth_data->tries = 0;
2250 ifmgd->auth_data->timeout = jiffies;
2251 run_again(ifmgd, ifmgd->auth_data->timeout);
2252 }
f0706e82
JB		 2253}
2254
d91f36db
JB		 2255/*
2256 * This is the canonical list of information elements we care about,
2257 * the filter code also gives us all changes to the Microsoft OUI
2258 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2259 *
2260 * We implement beacon filtering in software since that means we can
2261 * avoid processing the frame here and in cfg80211, and userspace
2262 * will not be able to tell whether the hardware supports it or not.
2263 *
2264 * XXX: This list needs to be dynamic -- userspace needs to be able to
2265 * add items it requires. It also needs to be able to tell us to
2266 * look out for other vendor IEs.
2267 */
2268static const u64 care_about_ies =
1d4df3a5
JB		 2269 (1ULL << WLAN_EID_COUNTRY) |
2270 (1ULL << WLAN_EID_ERP_INFO) |
2271 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2272 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2273 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2274 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2275
f698d856 2276static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2277 struct ieee80211_mgmt *mgmt,
2278 size_t len,
2279 struct ieee80211_rx_status *rx_status)
2280{
d91f36db 2281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2282 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2283 size_t baselen;
2284 struct ieee802_11_elems elems;
f698d856 2285 struct ieee80211_local *local = sdata->local;
471b3efd 2286 u32 changed = 0;
d91f36db 2287 bool erp_valid, directed_tim = false;
7a5158ef 2288 u8 erp_value = 0;
d91f36db 2289 u32 ncrc;
77fdaa12
JB		 2290 u8 *bssid;
2291
66e67e41 2292 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2293
ae6a44e3
EK		 2294 /* Process beacon from the current BSS */
2295 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2296 if (baselen > len)
2297 return;
2298
d91f36db 2299 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2300 return;
f0706e82 2301
66e67e41 2302 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2303 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2304 == 0) {
66e67e41
JB		 2305 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2306 len - baselen, &elems);
77fdaa12 2307
66e67e41
JB		 2308 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2309 false);
2310 ifmgd->assoc_data->have_beacon = true;
2311 ifmgd->assoc_data->sent_assoc = false;
2312 /* continue assoc process */
2313 ifmgd->assoc_data->timeout = jiffies;
2314 run_again(ifmgd, ifmgd->assoc_data->timeout);
2315 return;
2316 }
77fdaa12 2317
66e67e41 2318 if (!ifmgd->associated ||
888d04df 2319 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2320 return;
66e67e41 2321 bssid = ifmgd->associated->bssid;
f0706e82 2322
17e4ec14
JM		 2323 /* Track average RSSI from the Beacon frames of the current AP */
2324 ifmgd->last_beacon_signal = rx_status->signal;
2325 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2326 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2327 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2328 ifmgd->last_cqm_event_signal = 0;
391a200a 2329 ifmgd->count_beacon_signal = 1;
615f7b9b 2330 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2331 } else {
2332 ifmgd->ave_beacon_signal =
2333 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2334 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2335 ifmgd->ave_beacon_signal) / 16;
391a200a 2336 ifmgd->count_beacon_signal++;
17e4ec14 2337 }
615f7b9b
MV		 2338
2339 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2340 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2341 int sig = ifmgd->ave_beacon_signal;
2342 int last_sig = ifmgd->last_ave_beacon_signal;
2343
2344 /*
2345 * if signal crosses either of the boundaries, invoke callback
2346 * with appropriate parameters
2347 */
2348 if (sig > ifmgd->rssi_max_thold &&
2349 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2350 ifmgd->last_ave_beacon_signal = sig;
2351 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2352 } else if (sig < ifmgd->rssi_min_thold &&
2353 (last_sig >= ifmgd->rssi_max_thold ||
2354 last_sig == 0)) {
2355 ifmgd->last_ave_beacon_signal = sig;
2356 drv_rssi_callback(local, RSSI_EVENT_LOW);
2357 }
2358 }
2359
17e4ec14 2360 if (bss_conf->cqm_rssi_thold &&
391a200a 2361 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2362 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2363 int sig = ifmgd->ave_beacon_signal / 16;
2364 int last_event = ifmgd->last_cqm_event_signal;
2365 int thold = bss_conf->cqm_rssi_thold;
2366 int hyst = bss_conf->cqm_rssi_hyst;
2367 if (sig < thold &&
2368 (last_event == 0 || sig < last_event - hyst)) {
2369 ifmgd->last_cqm_event_signal = sig;
2370 ieee80211_cqm_rssi_notify(
2371 &sdata->vif,
2372 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2373 GFP_KERNEL);
2374 } else if (sig > thold &&
2375 (last_event == 0 || sig > last_event + hyst)) {
2376 ifmgd->last_cqm_event_signal = sig;
2377 ieee80211_cqm_rssi_notify(
2378 &sdata->vif,
2379 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2380 GFP_KERNEL);
2381 }
2382 }
2383
b291ba11 2384 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2385#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2386 if (net_ratelimit()) {
2387 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2388 "to a received beacon\n", sdata->name);
92778180
JM		 2389 }
2390#endif
b291ba11 2391 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2392 mutex_lock(&local->iflist_mtx);
2393 ieee80211_recalc_ps(local, -1);
2394 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2395 }
2396
b291ba11
JB		 2397 /*
2398 * Push the beacon loss detection into the future since
2399 * we are processing a beacon from the AP just now.
2400 */
d3a910a8 2401 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2402
d91f36db
JB		 2403 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2404 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2405 len - baselen, &elems,
2406 care_about_ies, ncrc);
2407
2408 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2409 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2410 ifmgd->aid);
d91f36db 2411
d8ec4433 2412 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2413 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2414 true);
d91f36db 2415
4ced3f74 2416 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2417 elems.wmm_param_len);
2418 }
fe3fa827 2419
25c9c875 2420 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2421 if (directed_tim) {
572e0012 2422 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2423 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2424 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2425 ieee80211_hw_config(local,
2426 IEEE80211_CONF_CHANGE_PS);
2427 }
572e0012 2428 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2429 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2430 local->pspolling = true;
2431
2432 /*
2433 * Here is assumed that the driver will be
2434 * able to send ps-poll frame and receive a
2435 * response even though power save mode is
2436 * enabled, but some drivers might require
2437 * to disable power save here. This needs
2438 * to be investigated.
2439 */
2440 ieee80211_send_pspoll(local, sdata);
2441 }
a97b77b9
VN		 2442 }
2443 }
7a5158ef 2444
d8ec4433 2445 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2446 return;
2447 ifmgd->beacon_crc = ncrc;
d8ec4433 2448 ifmgd->beacon_crc_valid = true;
30196673 2449
7a5158ef
JB		 2450 if (elems.erp_info && elems.erp_info_len >= 1) {
2451 erp_valid = true;
2452 erp_value = elems.erp_info[0];
2453 } else {
2454 erp_valid = false;
50c4afb9 2455 }
7a5158ef
JB		 2456 changed |= ieee80211_handle_bss_capability(sdata,
2457 le16_to_cpu(mgmt->u.beacon.capab_info),
2458 erp_valid, erp_value);
f0706e82 2459
d3c990fb 2460
074d46d1 2461 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2462 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2463 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2464
2465 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2466
24398e39
JB		 2467 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2468 bssid, true);
d3c990fb
RR		 2469 }
2470
8b19e6ca 2471 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2472 if (elems.country_elem) {
a8302de9
VT		 2473 /* TODO: IBSS also needs this */
2474 if (elems.pwr_constr_elem)
2475 ieee80211_handle_pwr_constr(sdata,
2476 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2477 elems.pwr_constr_elem,
2478 elems.pwr_constr_elem_len);
3f2355cb
LR		 2479 }
2480
471b3efd 2481 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2482}
2483
1fa57d01
JB		 2484void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2485 struct sk_buff *skb)
f0706e82 2486{
77fdaa12 2487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2488 struct ieee80211_rx_status *rx_status;
f0706e82 2489 struct ieee80211_mgmt *mgmt;
66e67e41 2490 struct cfg80211_bss *bss = NULL;
77fdaa12 2491 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2492 u16 fc;
2493
f0706e82
JB		 2494 rx_status = (struct ieee80211_rx_status *) skb->cb;
2495 mgmt = (struct ieee80211_mgmt *) skb->data;
2496 fc = le16_to_cpu(mgmt->frame_control);
2497
77fdaa12
JB		 2498 mutex_lock(&ifmgd->mtx);
2499
66e67e41
JB		 2500 switch (fc & IEEE80211_FCTL_STYPE) {
2501 case IEEE80211_STYPE_BEACON:
2502 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2503 break;
2504 case IEEE80211_STYPE_PROBE_RESP:
2505 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2506 break;
2507 case IEEE80211_STYPE_AUTH:
2508 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2509 break;
2510 case IEEE80211_STYPE_DEAUTH:
2511 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2512 break;
2513 case IEEE80211_STYPE_DISASSOC:
2514 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2515 break;
2516 case IEEE80211_STYPE_ASSOC_RESP:
2517 case IEEE80211_STYPE_REASSOC_RESP:
2518 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2519 break;
2520 case IEEE80211_STYPE_ACTION:
2521 switch (mgmt->u.action.category) {
2522 case WLAN_CATEGORY_SPECTRUM_MGMT:
2523 ieee80211_sta_process_chanswitch(sdata,
2524 &mgmt->u.action.u.chan_switch.sw_elem,
2525 (void *)ifmgd->associated->priv,
2526 rx_status->mactime);
77fdaa12 2527 break;
77fdaa12 2528 }
77fdaa12 2529 }
77fdaa12
JB		 2530 mutex_unlock(&ifmgd->mtx);
2531
66e67e41
JB		 2532 switch (rma) {
2533 case RX_MGMT_NONE:
2534 /* no action */
2535 break;
2536 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2537 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2538 break;
2539 case RX_MGMT_CFG80211_DISASSOC:
2540 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2541 break;
2542 case RX_MGMT_CFG80211_RX_AUTH:
2543 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2544 break;
2545 case RX_MGMT_CFG80211_RX_ASSOC:
2546 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2547 break;
2548 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2549 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2550 break;
2551 default:
2552 WARN(1, "unexpected: %d", rma);
b054b747 2553 }
f0706e82
JB		 2554}
2555
9c6bd790 2556static void ieee80211_sta_timer(unsigned long data)
f0706e82 2557{
60f8b39c
JB		 2558 struct ieee80211_sub_if_data *sdata =
2559 (struct ieee80211_sub_if_data *) data;
46900298 2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2561 struct ieee80211_local *local = sdata->local;
f0706e82 2562
5bb644a0
JB		 2563 if (local->quiescing) {
2564 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2565 return;
2566 }
2567
64592c8f 2568 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2569}
2570
04ac3c0e 2571static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2572 u8 *bssid, u8 reason)
04ac3c0e
FF		 2573{
2574 struct ieee80211_local *local = sdata->local;
2575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2576 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2577
2578 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2579 IEEE80211_STA_BEACON_POLL);
2580
37ad3888
JB		 2581 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2582 false, frame_buf);
04ac3c0e 2583 mutex_unlock(&ifmgd->mtx);
37ad3888 2584
04ac3c0e
FF		 2585 /*
2586 * must be outside lock due to cfg80211,
2587 * but that's not a problem.
2588 */
5fef7dbc 2589 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2590
2591 mutex_lock(&local->mtx);
2592 ieee80211_recalc_idle(local);
2593 mutex_unlock(&local->mtx);
2594
04ac3c0e
FF		 2595 mutex_lock(&ifmgd->mtx);
2596}
2597
66e67e41
JB		 2598static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2599{
2600 struct ieee80211_local *local = sdata->local;
2601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2602 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2603
2604 lockdep_assert_held(&ifmgd->mtx);
2605
2606 if (WARN_ON_ONCE(!auth_data))
2607 return -EINVAL;
2608
66e67e41
JB		 2609 auth_data->tries++;
2610
2611 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2612 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2613 sdata->name, auth_data->bss->bssid);
2614
2615 /*
2616 * Most likely AP is not in the range so remove the
2617 * bss struct for that AP.
2618 */
2619 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2620
2621 return -ETIMEDOUT;
2622 }
2623
2624 if (auth_data->bss->proberesp_ies) {
2625 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2626 sdata->name, auth_data->bss->bssid, auth_data->tries,
2627 IEEE80211_AUTH_MAX_TRIES);
2628
2629 auth_data->expected_transaction = 2;
2630 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2631 auth_data->ie, auth_data->ie_len,
2632 auth_data->bss->bssid,
2633 auth_data->bss->bssid, NULL, 0, 0);
2634 } else {
2635 const u8 *ssidie;
2636
2637 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2638 sdata->name, auth_data->bss->bssid, auth_data->tries,
2639 IEEE80211_AUTH_MAX_TRIES);
2640
2641 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2642 if (!ssidie)
2643 return -EINVAL;
2644 /*
2645 * Direct probe is sent to broadcast address as some APs
2646 * will not answer to direct packet in unassociated state.
2647 */
2648 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2649 NULL, 0, (u32) -1, true, false);
2650 }
2651
2652 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2653 run_again(ifmgd, auth_data->timeout);
2654
2655 return 0;
2656}
2657
2658static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2659{
2660 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2661 struct ieee80211_local *local = sdata->local;
2662
2663 lockdep_assert_held(&sdata->u.mgd.mtx);
2664
66e67e41
JB		 2665 assoc_data->tries++;
2666 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2667 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2668 sdata->name, assoc_data->bss->bssid);
2669
2670 /*
2671 * Most likely AP is not in the range so remove the
2672 * bss struct for that AP.
2673 */
2674 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2675
2676 return -ETIMEDOUT;
2677 }
2678
2679 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2680 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2681 IEEE80211_ASSOC_MAX_TRIES);
2682 ieee80211_send_assoc(sdata);
2683
2684 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2685 run_again(&sdata->u.mgd, assoc_data->timeout);
2686
2687 return 0;
2688}
2689
1fa57d01 2690void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2691{
9c6bd790 2692 struct ieee80211_local *local = sdata->local;
1fa57d01 2693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2694
77fdaa12
JB		 2695 mutex_lock(&ifmgd->mtx);
2696
66e67e41
JB		 2697 if (ifmgd->auth_data &&
2698 time_after(jiffies, ifmgd->auth_data->timeout)) {
2699 if (ifmgd->auth_data->done) {
2700 /*
2701 * ok ... we waited for assoc but userspace didn't,
2702 * so let's just kill the auth data
2703 */
2704 ieee80211_destroy_auth_data(sdata, false);
2705 } else if (ieee80211_probe_auth(sdata)) {
2706 u8 bssid[ETH_ALEN];
2707
2708 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2709
2710 ieee80211_destroy_auth_data(sdata, false);
2711
2712 mutex_unlock(&ifmgd->mtx);
2713 cfg80211_send_auth_timeout(sdata->dev, bssid);
2714 mutex_lock(&ifmgd->mtx);
2715 }
2716 } else if (ifmgd->auth_data)
2717 run_again(ifmgd, ifmgd->auth_data->timeout);
2718
2719 if (ifmgd->assoc_data &&
2720 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2721 if (!ifmgd->assoc_data->have_beacon ||
2722 ieee80211_do_assoc(sdata)) {
2723 u8 bssid[ETH_ALEN];
2724
2725 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2726
2727 ieee80211_destroy_assoc_data(sdata, false);
2728
2729 mutex_unlock(&ifmgd->mtx);
2730 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2731 mutex_lock(&ifmgd->mtx);
2732 }
2733 } else if (ifmgd->assoc_data)
2734 run_again(ifmgd, ifmgd->assoc_data->timeout);
2735
b291ba11
JB		 2736 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2737 IEEE80211_STA_CONNECTION_POLL) &&
2738 ifmgd->associated) {
a43abf29 2739 u8 bssid[ETH_ALEN];
72a8a3ed 2740 int max_tries;
a43abf29 2741
0c1ad2ca 2742 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2743
72a8a3ed 2744 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2745 max_tries = max_nullfunc_tries;
72a8a3ed 2746 else
180205bd 2747 max_tries = max_probe_tries;
72a8a3ed 2748
4e5ff376
FF		 2749 /* ACK received for nullfunc probing frame */
2750 if (!ifmgd->probe_send_count)
2751 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2752 else if (ifmgd->nullfunc_failed) {
2753 if (ifmgd->probe_send_count < max_tries) {
2754#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2755 wiphy_debug(local->hw.wiphy,
2756 "%s: No ack for nullfunc frame to"
bfc31df3 2757 " AP %pM, try %d/%i\n",
04ac3c0e 2758 sdata->name, bssid,
bfc31df3 2759 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2760#endif
2761 ieee80211_mgd_probe_ap_send(sdata);
2762 } else {
2763#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2764 wiphy_debug(local->hw.wiphy,
2765 "%s: No ack for nullfunc frame to"
2766 " AP %pM, disconnecting.\n",
c658e5db 2767 sdata->name, bssid);
04ac3c0e 2768#endif
95acac61
JB		 2769 ieee80211_sta_connection_lost(sdata, bssid,
2770 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2771 }
2772 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2773 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2774 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2775#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2776 wiphy_debug(local->hw.wiphy,
2777 "%s: Failed to send nullfunc to AP %pM"
2778 " after %dms, disconnecting.\n",
2779 sdata->name,
180205bd 2780 bssid, probe_wait_ms);
04ac3c0e 2781#endif
95acac61
JB		 2782 ieee80211_sta_connection_lost(sdata, bssid,
2783 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2784 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2785#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2786 wiphy_debug(local->hw.wiphy,
2787 "%s: No probe response from AP %pM"
bfc31df3 2788 " after %dms, try %d/%i\n",
b38afa87 2789 sdata->name,
180205bd 2790 bssid, probe_wait_ms,
bfc31df3 2791 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2792#endif
2793 ieee80211_mgd_probe_ap_send(sdata);
2794 } else {
b291ba11
JB		 2795 /*
2796 * We actually lost the connection ... or did we?
2797 * Let's make sure!
2798 */
b38afa87
BG		 2799 wiphy_debug(local->hw.wiphy,
2800 "%s: No probe response from AP %pM"
2801 " after %dms, disconnecting.\n",
2802 sdata->name,
180205bd 2803 bssid, probe_wait_ms);
04ac3c0e 2804
95acac61
JB		 2805 ieee80211_sta_connection_lost(sdata, bssid,
2806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2807 }
2808 }
2809
77fdaa12 2810 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2811
2812 mutex_lock(&local->mtx);
2813 ieee80211_recalc_idle(local);
2814 mutex_unlock(&local->mtx);
f0706e82
JB		 2815}
2816
b291ba11
JB		 2817static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2818{
2819 struct ieee80211_sub_if_data *sdata =
2820 (struct ieee80211_sub_if_data *) data;
2821 struct ieee80211_local *local = sdata->local;
2822
2823 if (local->quiescing)
2824 return;
2825
1e4dcd01
JO		 2826 ieee80211_queue_work(&sdata->local->hw,
2827 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2828}
2829
2830static void ieee80211_sta_conn_mon_timer(unsigned long data)
2831{
2832 struct ieee80211_sub_if_data *sdata =
2833 (struct ieee80211_sub_if_data *) data;
2834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2835 struct ieee80211_local *local = sdata->local;
2836
2837 if (local->quiescing)
2838 return;
2839
42935eca 2840 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2841}
2842
2843static void ieee80211_sta_monitor_work(struct work_struct *work)
2844{
2845 struct ieee80211_sub_if_data *sdata =
2846 container_of(work, struct ieee80211_sub_if_data,
2847 u.mgd.monitor_work);
2848
2849 ieee80211_mgd_probe_ap(sdata, false);
2850}
2851
9c6bd790
JB		 2852static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2853{
494f1fe5
EP		 2854 u32 flags;
2855
ad935687 2856 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2857 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2858 IEEE80211_STA_CONNECTION_POLL);
ad935687 2859
b291ba11 2860 /* let's probe the connection once */
494f1fe5
EP		 2861 flags = sdata->local->hw.flags;
2862 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2863 ieee80211_queue_work(&sdata->local->hw,
2864 &sdata->u.mgd.monitor_work);
b291ba11 2865 /* and do all the other regular work too */
64592c8f 2866 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2867 }
9c6bd790 2868}
f0706e82 2869
5bb644a0
JB		 2870#ifdef CONFIG_PM
2871void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2872{
2873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2874
2875 /*
2876 * we need to use atomic bitops for the running bits
2877 * only because both timers might fire at the same
2878 * time -- the code here is properly synchronised.
2879 */
2880
d1f5b7a3
JB		 2881 cancel_work_sync(&ifmgd->request_smps_work);
2882
0ecfe806 2883 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2884 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2885 if (del_timer_sync(&ifmgd->timer))
2886 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2887
2888 cancel_work_sync(&ifmgd->chswitch_work);
2889 if (del_timer_sync(&ifmgd->chswitch_timer))
2890 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2891
b291ba11
JB		 2892 /* these will just be re-established on connection */
2893 del_timer_sync(&ifmgd->conn_mon_timer);
2894 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2895}
2896
2897void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2898{
2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2900
676b58c2
RM		 2901 if (!ifmgd->associated)
2902 return;
2903
95acac61
JB		 2904 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2905 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2906 mutex_lock(&ifmgd->mtx);
2907 if (ifmgd->associated) {
2908#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2909 wiphy_debug(sdata->local->hw.wiphy,
2910 "%s: driver requested disconnect after resume.\n",
2911 sdata->name);
2912#endif
2913 ieee80211_sta_connection_lost(sdata,
2914 ifmgd->associated->bssid,
2915 WLAN_REASON_UNSPECIFIED);
2916 mutex_unlock(&ifmgd->mtx);
2917 return;
2918 }
2919 mutex_unlock(&ifmgd->mtx);
2920 }
2921
5bb644a0
JB		 2922 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2923 add_timer(&ifmgd->timer);
2924 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2925 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2926 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2927 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2928}
2929#endif
2930
9c6bd790
JB		 2931/* interface setup */
2932void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2933{
46900298 2934 struct ieee80211_if_managed *ifmgd;
988c0f72 2935
46900298 2936 ifmgd = &sdata->u.mgd;
b291ba11 2937 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2938 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2939 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2940 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2941 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2942 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2943 (unsigned long) sdata);
b291ba11
JB		 2944 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2945 (unsigned long) sdata);
2946 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2947 (unsigned long) sdata);
46900298 2948 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2949 (unsigned long) sdata);
9c6bd790 2950
ab1faead 2951 ifmgd->flags = 0;
1478acb3 2952 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2953 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2954 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2955
77fdaa12 2956 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2957
2958 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2959 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2960 else
2961 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2962}
2963
77fdaa12
JB		 2964/* scan finished notification */
2965void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2966{
77fdaa12 2967 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2968
77fdaa12
JB		 2969 /* Restart STA timers */
2970 rcu_read_lock();
2971 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2972 ieee80211_restart_sta_timer(sdata);
2973 rcu_read_unlock();
2974}
60f8b39c 2975
77fdaa12
JB		 2976int ieee80211_max_network_latency(struct notifier_block *nb,
2977 unsigned long data, void *dummy)
2978{
2979 s32 latency_usec = (s32) data;
2980 struct ieee80211_local *local =
2981 container_of(nb, struct ieee80211_local,
2982 network_latency_notifier);
1fa6f4af 2983
77fdaa12
JB		 2984 mutex_lock(&local->iflist_mtx);
2985 ieee80211_recalc_ps(local, latency_usec);
2986 mutex_unlock(&local->iflist_mtx);
dfe67012 2987
77fdaa12 2988 return 0;
9c6bd790
JB		 2989}
2990
a1cf775d 2991static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 2992 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 2993{
2994 struct ieee80211_local *local = sdata->local;
2995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 2996 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 2997 struct sta_info *sta;
2998 bool have_sta = false;
2999 int err;
24398e39
JB		 3000 int ht_cfreq;
3001 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3002 const u8 *ht_oper_ie;
3003 const struct ieee80211_ht_operation *ht_oper = NULL;
3004 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3005
3006 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3007 return -EINVAL;
3008
3009 if (assoc) {
3010 rcu_read_lock();
5d6a1b06 3011 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3012 rcu_read_unlock();
3013 }
3014
3015 if (!have_sta) {
5d6a1b06 3016 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3017 if (!sta)
3018 return -ENOMEM;
3019 }
3020
3021 mutex_lock(&local->mtx);
3022 ieee80211_recalc_idle(sdata->local);
3023 mutex_unlock(&local->mtx);
3024
3025 /* switch to the right channel */
24398e39
JB		 3026 sband = local->hw.wiphy->bands[cbss->channel->band];
3027
3028 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3029
3030 if (sband->ht_cap.ht_supported) {
3031 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3032 cbss->information_elements,
3033 cbss->len_information_elements);
3034 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3035 ht_oper = (void *)(ht_oper_ie + 2);
3036 }
3037
3038 if (ht_oper) {
3039 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3040 cbss->channel->band);
3041 /* check that channel matches the right operating channel */
3042 if (cbss->channel->center_freq != ht_cfreq) {
3043 /*
3044 * It's possible that some APs are confused here;
3045 * Netgear WNDR3700 sometimes reports 4 higher than
3046 * the actual channel in association responses, but
3047 * since we look at probe response/beacon data here
3048 * it should be OK.
3049 */
3050 printk(KERN_DEBUG
3051 "%s: Wrong control channel: center-freq: %d"
3052 " ht-cfreq: %d ht->primary_chan: %d"
3053 " band: %d. Disabling HT.\n",
3054 sdata->name, cbss->channel->center_freq,
3055 ht_cfreq, ht_oper->primary_chan,
3056 cbss->channel->band);
3057 ht_oper = NULL;
3058 }
3059 }
3060
3061 if (ht_oper) {
3062 channel_type = NL80211_CHAN_HT20;
3063
3064 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3065 switch (ht_oper->ht_param &
3066 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3067 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3068 channel_type = NL80211_CHAN_HT40PLUS;
3069 break;
3070 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3071 channel_type = NL80211_CHAN_HT40MINUS;
3072 break;
3073 }
3074 }
3075 }
3076
3077 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3078 /* can only fail due to HT40+/- mismatch */
3079 channel_type = NL80211_CHAN_HT20;
3080 printk(KERN_DEBUG
3081 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3082 sdata->name);
3083 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3084 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3085 channel_type));
3086 }
3087
5d6a1b06 3088 local->oper_channel = cbss->channel;
24398e39 3089 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3090
3091 if (!have_sta) {
5d6a1b06
JB		 3092 u32 rates = 0, basic_rates = 0;
3093 bool have_higher_than_11mbit;
3094 int min_rate = INT_MAX, min_rate_index = -1;
3095
5d6a1b06
JB		 3096 ieee80211_get_rates(sband, bss->supp_rates,
3097 bss->supp_rates_len,
3098 &rates, &basic_rates,
3099 &have_higher_than_11mbit,
3100 &min_rate, &min_rate_index);
3101
3102 /*
3103 * This used to be a workaround for basic rates missing
3104 * in the association response frame. Now that we no
3105 * longer use the basic rates from there, it probably
3106 * doesn't happen any more, but keep the workaround so
3107 * in case some *other* APs are buggy in different ways
3108 * we can connect -- with a warning.
3109 */
3110 if (!basic_rates && min_rate_index >= 0) {
3111 printk(KERN_DEBUG
3112 "%s: No basic rates, using min rate instead.\n",
3113 sdata->name);
3114 basic_rates = BIT(min_rate_index);
3115 }
3116
3117 sta->sta.supp_rates[cbss->channel->band] = rates;
3118 sdata->vif.bss_conf.basic_rates = basic_rates;
3119
3120 /* cf. IEEE 802.11 9.2.12 */
3121 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3122 have_higher_than_11mbit)
3123 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3124 else
3125 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3126
3127 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3128
3129 /* tell driver about BSSID and basic rates */
3130 ieee80211_bss_info_change_notify(sdata,
3131 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3132
3133 if (assoc)
3134 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3135
3136 err = sta_info_insert(sta);
3137 sta = NULL;
3138 if (err) {
3139 printk(KERN_DEBUG
3140 "%s: failed to insert STA entry for the AP (error %d)\n",
3141 sdata->name, err);
3142 return err;
3143 }
3144 } else
5d6a1b06 3145 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3146
3147 return 0;
3148}
3149
77fdaa12
JB		 3150/* config hooks */
3151int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3152 struct cfg80211_auth_request *req)
9c6bd790 3153{
66e67e41
JB		 3154 struct ieee80211_local *local = sdata->local;
3155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3156 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3157 u16 auth_alg;
66e67e41
JB		 3158 int err;
3159
3160 /* prepare auth data structure */
9c6bd790 3161
77fdaa12
JB		 3162 switch (req->auth_type) {
3163 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3164 auth_alg = WLAN_AUTH_OPEN;
3165 break;
3166 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3167 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3168 return -EOPNOTSUPP;
77fdaa12
JB		 3169 auth_alg = WLAN_AUTH_SHARED_KEY;
3170 break;
3171 case NL80211_AUTHTYPE_FT:
3172 auth_alg = WLAN_AUTH_FT;
3173 break;
3174 case NL80211_AUTHTYPE_NETWORK_EAP:
3175 auth_alg = WLAN_AUTH_LEAP;
3176 break;
3177 default:
3178 return -EOPNOTSUPP;
60f8b39c 3179 }
77fdaa12 3180
66e67e41
JB		 3181 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3182 if (!auth_data)
9c6bd790 3183 return -ENOMEM;
77fdaa12 3184
66e67e41 3185 auth_data->bss = req->bss;
77fdaa12
JB		 3186
3187 if (req->ie && req->ie_len) {
66e67e41
JB		 3188 memcpy(auth_data->ie, req->ie, req->ie_len);
3189 auth_data->ie_len = req->ie_len;
9c6bd790 3190 }
77fdaa12 3191
fffd0934 3192 if (req->key && req->key_len) {
66e67e41
JB		 3193 auth_data->key_len = req->key_len;
3194 auth_data->key_idx = req->key_idx;
3195 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3196 }
3197
66e67e41 3198 auth_data->algorithm = auth_alg;
60f8b39c 3199
66e67e41 3200 /* try to authenticate/probe */
2a33bee2 3201
66e67e41 3202 mutex_lock(&ifmgd->mtx);
2a33bee2 3203
66e67e41
JB		 3204 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3205 ifmgd->assoc_data) {
3206 err = -EBUSY;
3207 goto err_free;
2a33bee2
GE		 3208 }
3209
66e67e41
JB		 3210 if (ifmgd->auth_data)
3211 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3212
66e67e41
JB		 3213 /* prep auth_data so we don't go into idle on disassoc */
3214 ifmgd->auth_data = auth_data;
af6b6374 3215
66e67e41 3216 if (ifmgd->associated)
37ad3888 3217 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3218
66e67e41
JB		 3219 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3220 sdata->name, req->bss->bssid);
e5b900d2 3221
a1cf775d
JB		 3222 err = ieee80211_prep_connection(sdata, req->bss, false);
3223 if (err)
66e67e41 3224 goto err_clear;
af6b6374 3225
66e67e41
JB		 3226 err = ieee80211_probe_auth(sdata);
3227 if (err) {
66e67e41
JB		 3228 sta_info_destroy_addr(sdata, req->bss->bssid);
3229 goto err_clear;
3230 }
3231
3232 /* hold our own reference */
3233 cfg80211_ref_bss(auth_data->bss);
3234 err = 0;
3235 goto out_unlock;
3236
3237 err_clear:
3238 ifmgd->auth_data = NULL;
3239 err_free:
3240 kfree(auth_data);
3241 out_unlock:
3242 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3243
66e67e41 3244 return err;
af6b6374
JB		 3245}
3246
77fdaa12
JB		 3247int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3248 struct cfg80211_assoc_request *req)
f0706e82 3249{
66e67e41 3250 struct ieee80211_local *local = sdata->local;
77fdaa12 3251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3252 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3253 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3254 struct ieee80211_supported_band *sband;
66e67e41 3255 const u8 *ssidie;
2a33bee2 3256 int i, err;
f0706e82 3257
66e67e41
JB		 3258 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3259 if (!ssidie)
3260 return -EINVAL;
3261
3262 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3263 if (!assoc_data)
3264 return -ENOMEM;
3265
77fdaa12 3266 mutex_lock(&ifmgd->mtx);
9c87ba67 3267
66e67e41 3268 if (ifmgd->associated)
37ad3888 3269 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3270
3271 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3272 err = -EBUSY;
3273 goto err_free;
af6b6374 3274 }
77fdaa12 3275
66e67e41
JB		 3276 if (ifmgd->assoc_data) {
3277 err = -EBUSY;
3278 goto err_free;
3279 }
77fdaa12 3280
66e67e41
JB		 3281 if (ifmgd->auth_data) {
3282 bool match;
3283
3284 /* keep sta info, bssid if matching */
888d04df 3285 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3286 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3287 }
3288
66e67e41
JB		 3289 /* prepare assoc data */
3290
77fdaa12 3291 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3292 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3293
d8ec4433
JO		 3294 ifmgd->beacon_crc_valid = false;
3295
de5036aa
JB		 3296 /*
3297 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3298 * We still associate in non-HT mode (11a/b/g) if any one of these
3299 * ciphers is configured as pairwise.
3300 * We can set this to true for non-11n hardware, that'll be checked
3301 * separately along with the peer capabilities.
3302 */
77fdaa12
JB		 3303 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3304 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3305 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3306 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3308
ef96a842
BG		 3309 if (req->flags & ASSOC_REQ_DISABLE_HT)
3310 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3311
4e74bfdb
JB		 3312 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3313 sband = local->hw.wiphy->bands[req->bss->channel->band];
3314 if (!sband->ht_cap.ht_supported ||
3315 local->hw.queues < 4 || !bss->wmm_used)
3316 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3317
ef96a842
BG		 3318 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3319 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3320 sizeof(ifmgd->ht_capa_mask));
3321
77fdaa12 3322 if (req->ie && req->ie_len) {
66e67e41
JB		 3323 memcpy(assoc_data->ie, req->ie, req->ie_len);
3324 assoc_data->ie_len = req->ie_len;
3325 }
f679f65d 3326
66e67e41 3327 assoc_data->bss = req->bss;
f679f65d 3328
af6b6374
JB		 3329 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3330 if (ifmgd->powersave)
3331 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3332 else
3333 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3334 } else
3335 ifmgd->ap_smps = ifmgd->req_smps;
3336
66e67e41 3337 assoc_data->capability = req->bss->capability;
76f0303d 3338 assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
66e67e41
JB		 3339 assoc_data->supp_rates = bss->supp_rates;
3340 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3341 assoc_data->ht_operation_ie =
3342 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3343
ab13315a
KV		 3344 if (bss->wmm_used && bss->uapsd_supported &&
3345 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3346 assoc_data->uapsd = true;
ab13315a
KV		 3347 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3348 } else {
76f0303d 3349 assoc_data->uapsd = false;
ab13315a
KV		 3350 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3351 }
3352
66e67e41
JB		 3353 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3354 assoc_data->ssid_len = ssidie[1];
63f170e0 3355
77fdaa12 3356 if (req->prev_bssid)
66e67e41 3357 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3358
3359 if (req->use_mfp) {
3360 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3361 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3362 } else {
3363 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3364 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3365 }
3366
3367 if (req->crypto.control_port)
3368 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3369 else
3370 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3371
a621fa4d
JB		 3372 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3373 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3374
66e67e41
JB		 3375 /* kick off associate process */
3376
3377 ifmgd->assoc_data = assoc_data;
3378
a1cf775d
JB		 3379 err = ieee80211_prep_connection(sdata, req->bss, true);
3380 if (err)
3381 goto err_clear;
66e67e41
JB		 3382
3383 if (!bss->dtim_period &&
3384 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3385 /*
3386 * Wait up to one beacon interval ...
3387 * should this be more if we miss one?
3388 */
3389 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3390 sdata->name, ifmgd->bssid);
3391 assoc_data->timeout = jiffies +
3392 TU_TO_EXP_TIME(req->bss->beacon_interval);
3393 } else {
3394 assoc_data->have_beacon = true;
3395 assoc_data->sent_assoc = false;
3396 assoc_data->timeout = jiffies;
3397 }
3398 run_again(ifmgd, assoc_data->timeout);
3399
fcff4f10
PS		 3400 if (bss->corrupt_data) {
3401 char *corrupt_type = "data";
3402 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3403 if (bss->corrupt_data &
3404 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3405 corrupt_type = "beacon and probe response";
3406 else
3407 corrupt_type = "beacon";
3408 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3409 corrupt_type = "probe response";
3410 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3411 sdata->name, corrupt_type);
3412 }
3413
66e67e41
JB		 3414 err = 0;
3415 goto out;
3416 err_clear:
3417 ifmgd->assoc_data = NULL;
3418 err_free:
3419 kfree(assoc_data);
3420 out:
3421 mutex_unlock(&ifmgd->mtx);
3422
3423 return err;
f0706e82
JB		 3424}
3425
77fdaa12 3426int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3427 struct cfg80211_deauth_request *req)
f0706e82 3428{
46900298 3429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3430 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3431
77fdaa12
JB		 3432 mutex_lock(&ifmgd->mtx);
3433
37ad3888 3434 if (ifmgd->auth_data) {
66e67e41 3435 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3436 mutex_unlock(&ifmgd->mtx);
66e67e41 3437 return 0;
af6b6374 3438 }
77fdaa12 3439
37ad3888
JB		 3440 printk(KERN_DEBUG
3441 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3442 sdata->name, req->bssid, req->reason_code);
0ff71613 3443
37ad3888 3444 if (ifmgd->associated &&
888d04df 3445 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3446 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3447 req->reason_code, true, frame_buf);
37ad3888
JB		 3448 else
3449 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3450 IEEE80211_STYPE_DEAUTH,
3451 req->reason_code, true,
3452 frame_buf);
3453 mutex_unlock(&ifmgd->mtx);
3454
5fef7dbc 3455 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3456
7da7cc1d 3457 mutex_lock(&sdata->local->mtx);
bc83b681 3458 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3459 mutex_unlock(&sdata->local->mtx);
bc83b681 3460
f0706e82
JB		 3461 return 0;
3462}
84363e6e 3463
77fdaa12 3464int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3465 struct cfg80211_disassoc_request *req)
9c6bd790 3466{
77fdaa12 3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3468 u8 bssid[ETH_ALEN];
5fef7dbc 3469 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3470
77fdaa12 3471 mutex_lock(&ifmgd->mtx);
10f644a4 3472
8d8b261a
JB		 3473 /*
3474 * cfg80211 should catch this ... but it's racy since
3475 * we can receive a disassoc frame, process it, hand it
3476 * to cfg80211 while that's in a locked section already
3477 * trying to tell us that the user wants to disconnect.
3478 */
0c1ad2ca 3479 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3480 mutex_unlock(&ifmgd->mtx);
3481 return -ENOLINK;
3482 }
3483
0ff71613 3484 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3485 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3486
e69e95db 3487 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3488 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3489 req->reason_code, !req->local_state_change,
3490 frame_buf);
77fdaa12 3491 mutex_unlock(&ifmgd->mtx);
10f644a4 3492
5fef7dbc 3493 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3494
7da7cc1d 3495 mutex_lock(&sdata->local->mtx);
bc83b681 3496 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3497 mutex_unlock(&sdata->local->mtx);
bc83b681 3498
10f644a4
JB		 3499 return 0;
3500}
026331c4 3501
54e4ffb2
JB		 3502void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3503{
3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3505
3506 mutex_lock(&ifmgd->mtx);
3507 if (ifmgd->assoc_data)
3508 ieee80211_destroy_assoc_data(sdata, false);
3509 if (ifmgd->auth_data)
3510 ieee80211_destroy_auth_data(sdata, false);
3511 del_timer_sync(&ifmgd->timer);
3512 mutex_unlock(&ifmgd->mtx);
3513}
3514
a97c13c3
JO		 3515void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3516 enum nl80211_cqm_rssi_threshold_event rssi_event,
3517 gfp_t gfp)
3518{
3519 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3520
b5878a2d
JB		 3521 trace_api_cqm_rssi_notify(sdata, rssi_event);
3522
a97c13c3
JO		 3523 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3524}
3525EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3526
3527unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3528{
3529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3530 return sdata->dev->operstate;
3531}
3532EXPORT_SYMBOL(ieee80211_get_operstate);
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