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Merge branch 'for-linville' of git://git.kernel.org/pub/scm/linux/kernel/git/luca...
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
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 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
074d46d1 261 struct sk_buff *skb, const u8 *ht_oper_ie,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
074d46d1 266 struct ieee80211_ht_operation *ht_oper;
66e67e41
JB		 267 u8 *pos;
268 u32 flags = channel->flags;
269 u16 cap;
270 struct ieee80211_sta_ht_cap ht_cap;
271
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273
074d46d1 274 if (!ht_oper_ie)
66e67e41
JB		 275 return;
276
074d46d1 277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
66e67e41
JB		 278 return;
279
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
282
074d46d1 283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
66e67e41
JB		 284
285 /* determine capability flags */
286 cap = ht_cap.cap;
287
074d46d1 288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 }
300 break;
301 }
302
24398e39
JB		 303 /*
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
307 */
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
311 }
312
66e67e41
JB		 313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
315 switch (smps) {
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
318 WARN_ON(1);
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
322 break;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 }
332
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
336}
337
338static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
339{
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
343 struct sk_buff *skb;
344 struct ieee80211_mgmt *mgmt;
345 u8 *pos, qos_info;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
348 u16 capab;
349 struct ieee80211_supported_band *sband;
350 u32 rates = 0;
66e67e41
JB		 351
352 lockdep_assert_held(&ifmgd->mtx);
353
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
355
356 if (assoc_data->supp_rates_len) {
357 /*
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
361 * b-only mode)...
362 */
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
365 sband, &rates);
366 } else {
367 /*
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
371 */
372 rates = ~0;
373 rates_len = sband->n_bitrates;
374 }
375
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
384 9, /* WMM */
385 GFP_KERNEL);
386 if (!skb)
387 return;
388
389 skb_reserve(skb, local->hw.extra_tx_headroom);
390
391 capab = WLAN_CAPABILITY_ESS;
392
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
398 }
399
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
402
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
406
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
408 memset(mgmt, 0, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
412
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
414 skb_put(skb, 10);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
421 ETH_ALEN);
422 } else {
423 skb_put(skb, 4);
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
429 }
430
431 /* SSID */
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
436
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
440 supp_rates_len = 8;
441
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
445
446 count = 0;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
451 if (++count == 8)
452 break;
453 }
454 }
455
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
460
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
465 }
466 }
467 }
468
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
473 *pos++ = 2;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
476
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
486 }
487 }
488
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
492 WLAN_EID_SSID,
493 WLAN_EID_SUPP_RATES,
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
497 WLAN_EID_RSN,
498 WLAN_EID_QOS_CAPA,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
502 };
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
505 offset);
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
508 offset = noffset;
509 }
510
4e74bfdb 511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
074d46d1 512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
66e67e41
JB		 513 sband, local->oper_channel, ifmgd->ap_smps);
514
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
518 assoc_data->ie_len,
519 offset);
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
522 offset = noffset;
523 }
524
76f0303d
JB		 525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
dc41e4d4
EP		 527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
530 } else {
531 qos_info = 0;
532 }
533
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
538 *pos++ = 0x50;
539 *pos++ = 0xf2;
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
543 *pos++ = qos_info;
544 }
545
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
551 }
552
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
555}
556
ef422bc0 557static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 558 const u8 *bssid, u16 stype,
5fef7dbc
JB		 559 u16 reason, bool send_frame,
560 u8 *frame_buf)
9ac19a90
JB		 561{
562 struct ieee80211_local *local = sdata->local;
46900298 563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 564 struct sk_buff *skb;
5fef7dbc 565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 566
5fef7dbc
JB		 567 /* build frame */
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 571 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 574 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
576
5fef7dbc
JB		 577 if (send_frame) {
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
580 if (!skb)
581 return;
d5cdfacb 582
5fef7dbc
JB		 583 skb_reserve(skb, local->hw.extra_tx_headroom);
584
585 /* copy in frame */
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
588
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 592 ieee80211_tx_skb(sdata, skb);
5fef7dbc 593 }
9ac19a90
JB		 594}
595
572e0012
KV		 596void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
598{
572e0012
KV		 599 struct ieee80211_pspoll *pspoll;
600 struct sk_buff *skb;
572e0012 601
d8cd189e
KV		 602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
603 if (!skb)
572e0012 604 return;
572e0012 605
d8cd189e
KV		 606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 608
62ae67be
JB		 609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 611}
612
965bedad
JB		 613void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
615 int powersave)
616{
617 struct sk_buff *skb;
d8cd189e 618 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 620
d8cd189e
KV		 621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
622 if (!skb)
965bedad 623 return;
965bedad 624
d8cd189e 625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 626 if (powersave)
d8cd189e 627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 628
62ae67be 629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
633
62ae67be 634 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 635}
636
d524215f
FF		 637static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
639{
640 struct sk_buff *skb;
641 struct ieee80211_hdr *nullfunc;
642 __le16 fc;
643
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
645 return;
646
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 648 if (!skb)
d524215f 649 return;
d15b8459 650
d524215f
FF		 651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
662
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
665}
666
cc32abd4
JB		 667/* spectrum management related things */
668static void ieee80211_chswitch_work(struct work_struct *work)
669{
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
673
9607e6b6 674 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 675 return;
676
77fdaa12
JB		 677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
679 goto out;
cc32abd4
JB		 680
681 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 686 } else {
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 689 }
77fdaa12 690
cc32abd4 691 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 692 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 693
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
705
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
708
709 trace_api_chswitch_done(sdata, success);
710 if (!success) {
711 /*
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
716 */
717 sdata->local->csa_channel = sdata->local->oper_channel;
718 }
719
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
721}
722EXPORT_SYMBOL(ieee80211_chswitch_done);
723
cc32abd4
JB		 724static void ieee80211_chswitch_timer(unsigned long data)
725{
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
729
5bb644a0
JB		 730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
732 return;
733 }
734
42935eca 735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 736}
737
738void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 740 struct ieee80211_bss *bss,
741 u64 timestamp)
cc32abd4 742{
0c1ad2ca
JB		 743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
cc32abd4 749
77fdaa12
JB		 750 ASSERT_MGD_MTX(ifmgd);
751
752 if (!ifmgd->associated)
cc32abd4
JB		 753 return;
754
fbe9c429 755 if (sdata->local->scanning)
cc32abd4
JB		 756 return;
757
758 /* Disregard subsequent beacons if we are already running a timer
759 processing a CSA */
760
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
762 return;
763
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
766 return;
767
768 sdata->local->csa_channel = new_ch;
769
5ce6e438
JB		 770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
775 if (sw_elem->mode) {
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
779 }
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
784 return;
785 }
786
787 /* channel switch handled in software */
cc32abd4 788 if (sw_elem->count <= 1) {
42935eca 789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 790 } else {
9feaddc7
WYG		 791 if (sw_elem->mode)
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
796 jiffies +
797 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 798 cbss->beacon_interval));
cc32abd4
JB		 799 }
800}
801
802static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
805{
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
807
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
809 return;
810
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
813 return;
814
a48b13ac 815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
819 }
820}
821
f90754c1
JO		 822void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
823{
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
827
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
831
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
834}
835EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
836
837void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
838{
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
842
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
846
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
852}
853EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
854
965bedad
JB		 855/* powersave */
856static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
858{
859 struct ieee80211_conf *conf = &local->hw.conf;
860
d5edaedc
JB		 861 /*
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
864 */
fbe9c429 865 if (local->scanning)
d5edaedc
JB		 866 return;
867
965bedad
JB		 868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
872 } else {
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 875
2a13052f
JO		 876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
878 return;
879
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 882 }
883}
884
885static void ieee80211_change_ps(struct ieee80211_local *local)
886{
887 struct ieee80211_conf *conf = &local->hw.conf;
888
889 if (local->ps_sdata) {
965bedad
JB		 890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
896 }
897}
898
808118cb
JY		 899static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
900{
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
c2c98fde 903 bool authorized = false;
808118cb
JY		 904
905 if (!mgd->powersave)
906 return false;
907
05cb9108
JB		 908 if (mgd->broken_ap)
909 return false;
910
808118cb
JY		 911 if (!mgd->associated)
912 return false;
913
914 if (!mgd->associated->beacon_ies)
915 return false;
916
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 return false;
920
921 rcu_read_lock();
922 sta = sta_info_get(sdata, mgd->bssid);
923 if (sta)
c2c98fde 924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 925 rcu_read_unlock();
926
c2c98fde 927 return authorized;
808118cb
JY		 928}
929
965bedad 930/* need to hold RTNL or interface lock */
10f644a4 931void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 932{
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
934 int count = 0;
195e294d 935 int timeout;
965bedad
JB		 936
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
939 return;
940 }
941
af6b6374
JB		 942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
944 goto change;
945 }
946
965bedad 947 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 948 if (!ieee80211_sdata_running(sdata))
965bedad 949 continue;
8c7914de
RM		 950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
953 * ps_sdata to NULL.
954 */
955 count = 0;
956 break;
957 }
965bedad
JB		 958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
959 continue;
960 found = sdata;
961 count++;
962 }
963
808118cb 964 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 965 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 966 s32 beaconint_us;
967
968 if (latency < 0)
ed77134b 969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 970
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
973
ff616381 974 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 975 if (timeout < 0) {
976 /*
ff616381
JO		 977 * Go to full PSM if the user configures a very low
978 * latency requirement.
0ab82b04
EP		 979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
981 * with real values.
195e294d 982 */
0ab82b04
EP		 983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
195e294d 985 timeout = 0;
ff616381
JO		 986 else
987 timeout = 100;
195e294d 988 }
f90754c1
JO		 989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
195e294d 993
04fe2037 994 if (beaconint_us > latency) {
10f644a4 995 local->ps_sdata = NULL;
04fe2037 996 } else {
56007a02 997 struct ieee80211_bss *bss;
04fe2037 998 int maxslp = 1;
56007a02 999 u8 dtimper;
04fe2037 1000
56007a02
JB		 1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1003
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1005 if (!dtimper)
1006 dtimper = 1;
1007 else if (dtimper > 1)
04fe2037
JB		 1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1010
9ccebe61 1011 local->hw.conf.max_sleep_period = maxslp;
56007a02 1012 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1013 local->ps_sdata = found;
04fe2037 1014 }
10f644a4 1015 } else {
965bedad 1016 local->ps_sdata = NULL;
10f644a4 1017 }
965bedad 1018
af6b6374 1019 change:
965bedad
JB		 1020 ieee80211_change_ps(local);
1021}
1022
1023void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1028
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1032 }
1033
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1036}
1037
1038void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1039{
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1044 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1045 unsigned long flags;
1046 int q;
965bedad
JB		 1047
1048 /* can only happen when PS was just disabled anyway */
1049 if (!sdata)
1050 return;
1051
5e34069c
CL		 1052 ifmgd = &sdata->u.mgd;
1053
965bedad
JB		 1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1055 return;
1056
77b7023a
AN		 1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1062 msecs_to_jiffies(
1063 local->hw.conf.dynamic_ps_timeout));
1064 return;
1065 }
77b7023a
AN		 1066
1067 /*
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1071 */
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1076 flags);
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1078 msecs_to_jiffies(
1079 local->hw.conf.dynamic_ps_timeout));
1080 return;
1081 }
1082 }
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1084 }
1ddc2867 1085
375177bf 1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1088 netif_tx_stop_all_queues(sdata->dev);
965bedad 1089
e8306f98
VN		 1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1092 msecs_to_jiffies(
1093 local->hw.conf.dynamic_ps_timeout));
1094 else {
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1098 }
f3e85b9e
VN		 1099 }
1100
2a13052f
JO		 1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1107 }
f3e85b9e 1108
77b7023a
AN		 1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1111}
1112
1113void ieee80211_dynamic_ps_timer(unsigned long data)
1114{
1115 struct ieee80211_local *local = (void *) data;
1116
78f1a8b7 1117 if (local->quiescing || local->suspended)
5bb644a0
JB		 1118 return;
1119
42935eca 1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1121}
1122
60f8b39c 1123/* MLME */
f698d856 1124static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1125 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1126 u8 *wmm_param, size_t wmm_param_len)
1127{
f0706e82 1128 struct ieee80211_tx_queue_params params;
4ced3f74 1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1130 size_t left;
1131 int count;
ab13315a 1132 u8 *pos, uapsd_queues = 0;
f0706e82 1133
e1b3ec1a
SG		 1134 if (!local->ops->conf_tx)
1135 return;
1136
32c5057b 1137 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1138 return;
1139
1140 if (!wmm_param)
1141 return;
1142
f0706e82
JB		 1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1144 return;
ab13315a
KV		 1145
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1147 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1148
f0706e82 1149 count = wmm_param[6] & 0x0f;
46900298 1150 if (count == ifmgd->wmm_last_param_set)
f0706e82 1151 return;
46900298 1152 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1153
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1156
1157 memset(&params, 0, sizeof(params));
1158
f0706e82
JB		 1159 local->wmm_acm = 0;
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1163 bool uapsd = false;
f0706e82
JB		 1164 int queue;
1165
1166 switch (aci) {
0eeb59fe 1167 case 1: /* AC_BK */
e100bb64 1168 queue = 3;
988c0f72 1169 if (acm)
0eeb59fe 1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1172 uapsd = true;
f0706e82 1173 break;
0eeb59fe 1174 case 2: /* AC_VI */
e100bb64 1175 queue = 1;
988c0f72 1176 if (acm)
0eeb59fe 1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1179 uapsd = true;
f0706e82 1180 break;
0eeb59fe 1181 case 3: /* AC_VO */
e100bb64 1182 queue = 0;
988c0f72 1183 if (acm)
0eeb59fe 1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1186 uapsd = true;
f0706e82 1187 break;
0eeb59fe 1188 case 0: /* AC_BE */
f0706e82 1189 default:
e100bb64 1190 queue = 2;
988c0f72 1191 if (acm)
0eeb59fe 1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1194 uapsd = true;
f0706e82
JB		 1195 break;
1196 }
1197
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1201 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1202 params.uapsd = uapsd;
1203
f4ea83dd 1204#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1208 queue, aci, acm,
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
3330d7be 1211#endif
f6f3def3
EP		 1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1216 queue);
f0706e82 1217 }
e1b3ec1a
SG		 1218
1219 /* enable WMM or activate new settings */
4ced3f74 1220 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1221}
1222
7a5158ef
JB		 1223static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1224 u16 capab, bool erp_valid, u8 erp)
5628221c 1225{
bda3933a 1226 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1227 u32 changed = 0;
7a5158ef
JB		 1228 bool use_protection;
1229 bool use_short_preamble;
1230 bool use_short_slot;
1231
1232 if (erp_valid) {
1233 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1234 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1235 } else {
1236 use_protection = false;
1237 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1238 }
1239
1240 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1241 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1242 use_short_slot = true;
5628221c 1243
471b3efd 1244 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1245 bss_conf->use_cts_prot = use_protection;
1246 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1247 }
7e9ed188 1248
d43c7b37 1249 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1250 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1251 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1252 }
d9430a32 1253
7a5158ef 1254 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1255 bss_conf->use_short_slot = use_short_slot;
1256 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1257 }
1258
1259 return changed;
1260}
1261
f698d856 1262static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1263 struct cfg80211_bss *cbss,
ae5eb026 1264 u32 bss_info_changed)
f0706e82 1265{
0c1ad2ca 1266 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1267 struct ieee80211_local *local = sdata->local;
68542962 1268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1269
ae5eb026 1270 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1271 /* set timing information */
68542962 1272 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1273 bss_conf->last_tsf = cbss->tsf;
5628221c 1274
77fdaa12
JB		 1275 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1276 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1277 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1278
7ccc8bd7
FF		 1279 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1281
0c1ad2ca
JB		 1282 sdata->u.mgd.associated = cbss;
1283 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1284
17e4ec14
JM		 1285 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1286
b291ba11
JB		 1287 /* just to be sure */
1288 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1289 IEEE80211_STA_BEACON_POLL);
1290
9ac19a90 1291 ieee80211_led_assoc(local, 1);
9306102e 1292
e5b900d2
JB		 1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1295 else
1296 bss_conf->dtim_period = 0;
1297
68542962 1298 bss_conf->assoc = 1;
9cef8737 1299
a97c13c3 1300 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1302 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1303 bss_info_changed |= BSS_CHANGED_CQM;
1304
68542962
JO		 1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1309 }
1310
ae5eb026 1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1312
056508dc
JB		 1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
025e6be2 1315 ieee80211_recalc_smps(local);
056508dc 1316 mutex_unlock(&local->iflist_mtx);
e0cb686f 1317
8a5b33f5 1318 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1319 netif_carrier_on(sdata->dev);
f0706e82
JB		 1320}
1321
e69e95db 1322static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1323 u16 stype, u16 reason, bool tx,
1324 u8 *frame_buf)
aa458d17 1325{
46900298 1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
3cc5240b 1329 u32 changed = 0;
b291ba11 1330 u8 bssid[ETH_ALEN];
aa458d17 1331
77fdaa12
JB		 1332 ASSERT_MGD_MTX(ifmgd);
1333
37ad3888
JB		 1334 if (WARN_ON_ONCE(tx && !frame_buf))
1335 return;
1336
b291ba11
JB		 1337 if (WARN_ON(!ifmgd->associated))
1338 return;
1339
0c1ad2ca 1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1341
77fdaa12
JB		 1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1344
1345 /*
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1350 */
1351 smp_mb();
1352
1353 /*
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1357 */
aa458d17 1358
8a5b33f5 1359 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1360 netif_carrier_off(sdata->dev);
1361
2a419056 1362 mutex_lock(&local->sta_mtx);
abe60632 1363 sta = sta_info_get(sdata, bssid);
4cad6c7c 1364 if (sta) {
c2c98fde 1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1367 }
2a419056 1368 mutex_unlock(&local->sta_mtx);
aa458d17 1369
37ad3888
JB		 1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1373 tx, frame_buf);
1374
1375 /* flush out frame */
1376 if (tx)
1377 drv_flush(local, false);
1378
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1381
1382 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1383 changed |= ieee80211_reset_erp_info(sdata);
1384
f5e5bf25 1385 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1388
413ad50a 1389 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1392
a8302de9
VT		 1393 local->power_constr_level = 0;
1394
520eb820
KV		 1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1397
e0cb686f
KV		 1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1401 }
a331400b 1402 local->ps_sdata = NULL;
ae5eb026 1403
68542962
JO		 1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1408 }
1409
3abead59
JB		 1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1412
0aaffa9b
JB		 1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1415 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1416
3cc5240b
JB		 1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1420
3abead59
JB		 1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1423
b9dcf712
JB		 1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1428}
f0706e82 1429
3cf335d5
KV		 1430void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1432{
1433 /*
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
3cf335d5 1440 */
b291ba11
JB		 1441 if (is_multicast_ether_addr(hdr->addr1))
1442 return;
1443
be099e82 1444 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1445}
f0706e82 1446
4e5ff376
FF		 1447static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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 {
88c868c4
SG		 1521 int ssid_len;
1522
4e5ff376 1523 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1524 if (WARN_ON_ONCE(ssid == NULL))
1525 ssid_len = 0;
1526 else
1527 ssid_len = ssid[1];
1528
1529 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1530 0, (u32) -1, true, false);
4e5ff376 1531 }
a43abf29
ML		 1532
1533 ifmgd->probe_send_count++;
180205bd 1534 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1535 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1536 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1537 drv_flush(sdata->local, false);
a43abf29
ML		 1538}
1539
b291ba11
JB		 1540static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1541 bool beacon)
04de8381 1542{
04de8381 1543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1544 bool already = false;
34bfc411 1545
9607e6b6 1546 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1547 return;
1548
91a3bd76
LR		 1549 if (sdata->local->scanning)
1550 return;
1551
b8bc4b0a
JB		 1552 if (sdata->local->tmp_channel)
1553 return;
1554
77fdaa12
JB		 1555 mutex_lock(&ifmgd->mtx);
1556
1557 if (!ifmgd->associated)
1558 goto out;
1559
a860402d 1560#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1561 if (beacon && net_ratelimit())
1562 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1563 "- sending probe request\n", sdata->name);
a860402d 1564#endif
04de8381 1565
b291ba11
JB		 1566 /*
1567 * The driver/our work has already reported this event or the
1568 * connection monitoring has kicked in and we have already sent
1569 * a probe request. Or maybe the AP died and the driver keeps
1570 * reporting until we disassociate...
1571 *
1572 * In either case we have to ignore the current call to this
1573 * function (except for setting the correct probe reason bit)
1574 * because otherwise we would reset the timer every time and
1575 * never check whether we received a probe response!
1576 */
1577 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1578 IEEE80211_STA_CONNECTION_POLL))
1579 already = true;
1580
1581 if (beacon)
1582 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1583 else
1584 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1585
1586 if (already)
1587 goto out;
1588
4e751843
JB		 1589 mutex_lock(&sdata->local->iflist_mtx);
1590 ieee80211_recalc_ps(sdata->local, -1);
1591 mutex_unlock(&sdata->local->iflist_mtx);
1592
a43abf29
ML		 1593 ifmgd->probe_send_count = 0;
1594 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1595 out:
1596 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1597}
1598
a619a4c0
JO		 1599struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1600 struct ieee80211_vif *vif)
1601{
1602 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1604 struct sk_buff *skb;
1605 const u8 *ssid;
88c868c4 1606 int ssid_len;
a619a4c0
JO		 1607
1608 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1609 return NULL;
1610
1611 ASSERT_MGD_MTX(ifmgd);
1612
1613 if (!ifmgd->associated)
1614 return NULL;
1615
1616 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1617 if (WARN_ON_ONCE(ssid == NULL))
1618 ssid_len = 0;
1619 else
1620 ssid_len = ssid[1];
1621
a619a4c0 1622 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1623 (u32) -1, ssid + 2, ssid_len,
85a237fe 1624 NULL, 0, true);
a619a4c0
JO		 1625
1626 return skb;
1627}
1628EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1629
1e4dcd01
JO		 1630static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1631{
1632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1633 struct ieee80211_local *local = sdata->local;
1634 u8 bssid[ETH_ALEN];
5fef7dbc 1635 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1636
1637 mutex_lock(&ifmgd->mtx);
1638 if (!ifmgd->associated) {
1639 mutex_unlock(&ifmgd->mtx);
1640 return;
1641 }
1642
1643 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1644
180205bd
BG		 1645 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1646 sdata->name, bssid);
1e4dcd01 1647
37ad3888
JB		 1648 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1649 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1650 false, frame_buf);
1e4dcd01 1651 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1652
1e4dcd01
JO		 1653 /*
1654 * must be outside lock due to cfg80211,
1655 * but that's not a problem.
1656 */
5fef7dbc 1657 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1658
1659 mutex_lock(&local->mtx);
1660 ieee80211_recalc_idle(local);
1661 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1662}
1663
1664void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1665{
1666 struct ieee80211_sub_if_data *sdata =
1667 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1668 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1669 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1670 struct sta_info *sta;
1671
1672 if (ifmgd->associated) {
30fa9047 1673 rcu_read_lock();
a85e1d55
PS		 1674 sta = sta_info_get(sdata, ifmgd->bssid);
1675 if (sta)
1676 sta->beacon_loss_count++;
30fa9047 1677 rcu_read_unlock();
a85e1d55 1678 }
b291ba11 1679
1e4dcd01
JO		 1680 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1681 __ieee80211_connection_loss(sdata);
1682 else
1683 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1684}
1685
04de8381
KV		 1686void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1687{
1688 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1689 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1690
b5878a2d
JB		 1691 trace_api_beacon_loss(sdata);
1692
1e4dcd01
JO		 1693 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1694 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1695}
1696EXPORT_SYMBOL(ieee80211_beacon_loss);
1697
1e4dcd01
JO		 1698void ieee80211_connection_loss(struct ieee80211_vif *vif)
1699{
1700 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1701 struct ieee80211_hw *hw = &sdata->local->hw;
1702
b5878a2d
JB		 1703 trace_api_connection_loss(sdata);
1704
1e4dcd01
JO		 1705 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1706 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1707}
1708EXPORT_SYMBOL(ieee80211_connection_loss);
1709
1710
66e67e41
JB		 1711static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1712 bool assoc)
1713{
1714 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1715
1716 lockdep_assert_held(&sdata->u.mgd.mtx);
1717
66e67e41
JB		 1718 if (!assoc) {
1719 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1720
1721 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1722 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1723 }
1724
1725 cfg80211_put_bss(auth_data->bss);
1726 kfree(auth_data);
1727 sdata->u.mgd.auth_data = NULL;
1728}
1729
1730static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1731 struct ieee80211_mgmt *mgmt, size_t len)
1732{
1733 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1734 u8 *pos;
1735 struct ieee802_11_elems elems;
1736
1737 pos = mgmt->u.auth.variable;
1738 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1739 if (!elems.challenge)
1740 return;
1741 auth_data->expected_transaction = 4;
1742 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1743 elems.challenge - 2, elems.challenge_len + 2,
1744 auth_data->bss->bssid, auth_data->bss->bssid,
1745 auth_data->key, auth_data->key_len,
1746 auth_data->key_idx);
1747}
1748
1749static enum rx_mgmt_action __must_check
1750ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1751 struct ieee80211_mgmt *mgmt, size_t len)
1752{
1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1754 u8 bssid[ETH_ALEN];
1755 u16 auth_alg, auth_transaction, status_code;
1756 struct sta_info *sta;
1757
1758 lockdep_assert_held(&ifmgd->mtx);
1759
1760 if (len < 24 + 6)
1761 return RX_MGMT_NONE;
1762
1763 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1764 return RX_MGMT_NONE;
1765
1766 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1767
888d04df 1768 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1769 return RX_MGMT_NONE;
1770
1771 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1772 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1773 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1774
1775 if (auth_alg != ifmgd->auth_data->algorithm ||
1776 auth_transaction != ifmgd->auth_data->expected_transaction)
1777 return RX_MGMT_NONE;
1778
1779 if (status_code != WLAN_STATUS_SUCCESS) {
1780 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1781 sdata->name, mgmt->sa, status_code);
1782 goto out;
1783 }
1784
1785 switch (ifmgd->auth_data->algorithm) {
1786 case WLAN_AUTH_OPEN:
1787 case WLAN_AUTH_LEAP:
1788 case WLAN_AUTH_FT:
1789 break;
1790 case WLAN_AUTH_SHARED_KEY:
1791 if (ifmgd->auth_data->expected_transaction != 4) {
1792 ieee80211_auth_challenge(sdata, mgmt, len);
1793 /* need another frame */
1794 return RX_MGMT_NONE;
1795 }
1796 break;
1797 default:
1798 WARN_ONCE(1, "invalid auth alg %d",
1799 ifmgd->auth_data->algorithm);
1800 return RX_MGMT_NONE;
1801 }
1802
1803 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1804 out:
66e67e41
JB		 1805 ifmgd->auth_data->done = true;
1806 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1807 run_again(ifmgd, ifmgd->auth_data->timeout);
1808
1809 /* move station state to auth */
1810 mutex_lock(&sdata->local->sta_mtx);
1811 sta = sta_info_get(sdata, bssid);
1812 if (!sta) {
1813 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1814 goto out_err;
1815 }
1816 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1817 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1818 sdata->name, bssid);
1819 goto out_err;
1820 }
1821 mutex_unlock(&sdata->local->sta_mtx);
1822
1823 return RX_MGMT_CFG80211_RX_AUTH;
1824 out_err:
1825 mutex_unlock(&sdata->local->sta_mtx);
1826 /* ignore frame -- wait for timeout */
1827 return RX_MGMT_NONE;
1828}
1829
1830
77fdaa12
JB		 1831static enum rx_mgmt_action __must_check
1832ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1833 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1834{
46900298 1835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1836 const u8 *bssid = NULL;
f0706e82
JB		 1837 u16 reason_code;
1838
66e67e41
JB		 1839 lockdep_assert_held(&ifmgd->mtx);
1840
f4ea83dd 1841 if (len < 24 + 2)
77fdaa12 1842 return RX_MGMT_NONE;
f0706e82 1843
66e67e41 1844 if (!ifmgd->associated ||
888d04df 1845 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1846 return RX_MGMT_NONE;
77fdaa12 1847
0c1ad2ca 1848 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1849
1850 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1851
77fdaa12 1852 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1853 sdata->name, bssid, reason_code);
77fdaa12 1854
37ad3888
JB		 1855 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1856
7da7cc1d 1857 mutex_lock(&sdata->local->mtx);
63f170e0 1858 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1859 mutex_unlock(&sdata->local->mtx);
f0706e82 1860
77fdaa12 1861 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1862}
1863
1864
77fdaa12
JB		 1865static enum rx_mgmt_action __must_check
1866ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1867 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1868{
46900298 1869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1870 u16 reason_code;
1871
66e67e41 1872 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1873
66e67e41 1874 if (len < 24 + 2)
77fdaa12
JB		 1875 return RX_MGMT_NONE;
1876
66e67e41 1877 if (!ifmgd->associated ||
888d04df 1878 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1879 return RX_MGMT_NONE;
f0706e82
JB		 1880
1881 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1882
0ff71613 1883 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1884 sdata->name, mgmt->sa, reason_code);
f0706e82 1885
37ad3888
JB		 1886 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1887
7da7cc1d 1888 mutex_lock(&sdata->local->mtx);
bc83b681 1889 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1890 mutex_unlock(&sdata->local->mtx);
37ad3888 1891
77fdaa12 1892 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1893}
1894
c74d084f
CL		 1895static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1896 u8 *supp_rates, unsigned int supp_rates_len,
1897 u32 *rates, u32 *basic_rates,
1898 bool *have_higher_than_11mbit,
1899 int *min_rate, int *min_rate_index)
1900{
1901 int i, j;
1902
1903 for (i = 0; i < supp_rates_len; i++) {
1904 int rate = (supp_rates[i] & 0x7f) * 5;
1905 bool is_basic = !!(supp_rates[i] & 0x80);
1906
1907 if (rate > 110)
1908 *have_higher_than_11mbit = true;
1909
1910 /*
1911 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1912 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1913 *
1914 * Note: Even through the membership selector and the basic
1915 * rate flag share the same bit, they are not exactly
1916 * the same.
1917 */
1918 if (!!(supp_rates[i] & 0x80) &&
1919 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1920 continue;
1921
1922 for (j = 0; j < sband->n_bitrates; j++) {
1923 if (sband->bitrates[j].bitrate == rate) {
1924 *rates |= BIT(j);
1925 if (is_basic)
1926 *basic_rates |= BIT(j);
1927 if (rate < *min_rate) {
1928 *min_rate = rate;
1929 *min_rate_index = j;
1930 }
1931 break;
1932 }
1933 }
1934 }
1935}
f0706e82 1936
66e67e41
JB		 1937static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1938 bool assoc)
1939{
1940 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1941
1942 lockdep_assert_held(&sdata->u.mgd.mtx);
1943
66e67e41
JB		 1944 if (!assoc) {
1945 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1946
1947 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1948 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1949 }
1950
1951 kfree(assoc_data);
1952 sdata->u.mgd.assoc_data = NULL;
1953}
1954
1955static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1956 struct cfg80211_bss *cbss,
af6b6374 1957 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1958{
46900298 1959 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1960 struct ieee80211_local *local = sdata->local;
8318d78a 1961 struct ieee80211_supported_band *sband;
f0706e82 1962 struct sta_info *sta;
af6b6374 1963 u8 *pos;
af6b6374 1964 u16 capab_info, aid;
f0706e82 1965 struct ieee802_11_elems elems;
bda3933a 1966 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1967 u32 changed = 0;
c74d084f 1968 int err;
f0706e82 1969
af6b6374 1970 /* AssocResp and ReassocResp have identical structure */
f0706e82 1971
f0706e82 1972 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1973 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1974
1dd84aa2 1975 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1976 printk(KERN_DEBUG
1977 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1978 sdata->name, aid);
1dd84aa2
JB		 1979 aid &= ~(BIT(15) | BIT(14));
1980
05cb9108
JB		 1981 ifmgd->broken_ap = false;
1982
1983 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1984 printk(KERN_DEBUG
1985 "%s: invalid AID value %d (out of range), turn off PS\n",
1986 sdata->name, aid);
1987 aid = 0;
1988 ifmgd->broken_ap = true;
1989 }
1990
af6b6374
JB		 1991 pos = mgmt->u.assoc_resp.variable;
1992 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1993
f0706e82
JB		 1994 if (!elems.supp_rates) {
1995 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1996 sdata->name);
af6b6374 1997 return false;
f0706e82
JB		 1998 }
1999
46900298 2000 ifmgd->aid = aid;
f0706e82 2001
2a33bee2
GE		 2002 mutex_lock(&sdata->local->sta_mtx);
2003 /*
2004 * station info was already allocated and inserted before
2005 * the association and should be available to us
2006 */
7852e361 2007 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2008 if (WARN_ON(!sta)) {
2009 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2010 return false;
77fdaa12 2011 }
05e5e883 2012
66e67e41 2013 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2014
ab1faead 2015 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2016 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2017 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2018
64f68e5d
JB		 2019 sta->supports_40mhz =
2020 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2021
4b7679a5 2022 rate_control_rate_init(sta);
f0706e82 2023
46900298 2024 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2025 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2026
ddf4ac53 2027 if (elems.wmm_param)
c2c98fde 2028 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2029
c8987876
JB		 2030 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2031 if (!err)
2032 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2033 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2034 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2035 if (err) {
2036 printk(KERN_DEBUG
2037 "%s: failed to move station %pM to desired state\n",
2038 sdata->name, sta->sta.addr);
2039 WARN_ON(__sta_info_destroy(sta));
2040 mutex_unlock(&sdata->local->sta_mtx);
2041 return false;
2042 }
2043
7852e361 2044 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2045
f2176d72
JO		 2046 /*
2047 * Always handle WMM once after association regardless
2048 * of the first value the AP uses. Setting -1 here has
2049 * that effect because the AP values is an unsigned
2050 * 4-bit value.
2051 */
2052 ifmgd->wmm_last_param_set = -1;
2053
ddf4ac53 2054 if (elems.wmm_param)
4ced3f74 2055 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2056 elems.wmm_param_len);
aa837e1d 2057 else
3abead59
JB		 2058 ieee80211_set_wmm_default(sdata, false);
2059 changed |= BSS_CHANGED_QOS;
f0706e82 2060
074d46d1 2061 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2062 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2063 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2064 cbss->bssid, false);
ae5eb026 2065
60f8b39c
JB		 2066 /* set AID and assoc capability,
2067 * ieee80211_set_associated() will tell the driver */
2068 bss_conf->aid = aid;
2069 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2070 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2071
d524215f
FF		 2072 /*
2073 * If we're using 4-addr mode, let the AP know that we're
2074 * doing so, so that it can create the STA VLAN on its side
2075 */
2076 if (ifmgd->use_4addr)
2077 ieee80211_send_4addr_nullfunc(local, sdata);
2078
15b7b062 2079 /*
b291ba11
JB		 2080 * Start timer to probe the connection to the AP now.
2081 * Also start the timer that will detect beacon loss.
15b7b062 2082 */
b291ba11 2083 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2084 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2085
af6b6374 2086 return true;
f0706e82
JB		 2087}
2088
66e67e41
JB		 2089static enum rx_mgmt_action __must_check
2090ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2091 struct ieee80211_mgmt *mgmt, size_t len,
2092 struct cfg80211_bss **bss)
2093{
2094 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2095 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2096 u16 capab_info, status_code, aid;
2097 struct ieee802_11_elems elems;
2098 u8 *pos;
2099 bool reassoc;
2100
2101 lockdep_assert_held(&ifmgd->mtx);
2102
2103 if (!assoc_data)
2104 return RX_MGMT_NONE;
888d04df 2105 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2106 return RX_MGMT_NONE;
2107
2108 /*
2109 * AssocResp and ReassocResp have identical structure, so process both
2110 * of them in this function.
2111 */
2112
2113 if (len < 24 + 6)
2114 return RX_MGMT_NONE;
2115
2116 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2117 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2118 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2119 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2120
2121 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2122 "status=%d aid=%d)\n",
2123 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2124 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2125
2126 pos = mgmt->u.assoc_resp.variable;
2127 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2128
2129 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2130 elems.timeout_int && elems.timeout_int_len == 5 &&
2131 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2132 u32 tu, ms;
2133 tu = get_unaligned_le32(elems.timeout_int + 1);
2134 ms = tu * 1024 / 1000;
2135 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2136 "comeback duration %u TU (%u ms)\n",
2137 sdata->name, mgmt->sa, tu, ms);
2138 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2139 if (ms > IEEE80211_ASSOC_TIMEOUT)
2140 run_again(ifmgd, assoc_data->timeout);
2141 return RX_MGMT_NONE;
2142 }
2143
2144 *bss = assoc_data->bss;
2145
2146 if (status_code != WLAN_STATUS_SUCCESS) {
2147 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2148 sdata->name, mgmt->sa, status_code);
2149 ieee80211_destroy_assoc_data(sdata, false);
2150 } else {
2151 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2152
66e67e41
JB		 2153 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2154 /* oops -- internal error -- send timeout for now */
79ebfb85 2155 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2156 sta_info_destroy_addr(sdata, mgmt->bssid);
2157 cfg80211_put_bss(*bss);
2158 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2159 }
79ebfb85
JB		 2160
2161 /*
2162 * destroy assoc_data afterwards, as otherwise an idle
2163 * recalc after assoc_data is NULL but before associated
2164 * is set can cause the interface to go idle
2165 */
2166 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2167 }
2168
2169 return RX_MGMT_CFG80211_RX_ASSOC;
2170}
98c8fccf
JB		 2171static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2172 struct ieee80211_mgmt *mgmt,
2173 size_t len,
2174 struct ieee80211_rx_status *rx_status,
2175 struct ieee802_11_elems *elems,
2176 bool beacon)
2177{
2178 struct ieee80211_local *local = sdata->local;
2179 int freq;
c2b13452 2180 struct ieee80211_bss *bss;
98c8fccf 2181 struct ieee80211_channel *channel;
56007a02
JB		 2182 bool need_ps = false;
2183
66e67e41 2184 if (sdata->u.mgd.associated &&
888d04df
FF		 2185 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2186 == 0) {
56007a02
JB		 2187 bss = (void *)sdata->u.mgd.associated->priv;
2188 /* not previously set so we may need to recalc */
2189 need_ps = !bss->dtim_period;
2190 }
98c8fccf
JB		 2191
2192 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2193 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2194 rx_status->band);
98c8fccf
JB		 2195 else
2196 freq = rx_status->freq;
2197
2198 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2199
2200 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2201 return;
2202
98c8fccf 2203 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2204 channel, beacon);
77fdaa12
JB		 2205 if (bss)
2206 ieee80211_rx_bss_put(local, bss);
2207
2208 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2209 return;
2210
56007a02
JB		 2211 if (need_ps) {
2212 mutex_lock(&local->iflist_mtx);
2213 ieee80211_recalc_ps(local, -1);
2214 mutex_unlock(&local->iflist_mtx);
2215 }
2216
c481ec97 2217 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2218 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2219 ETH_ALEN) == 0)) {
c481ec97
S		 2220 struct ieee80211_channel_sw_ie *sw_elem =
2221 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2222 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2223 bss, rx_status->mactime);
c481ec97 2224 }
f0706e82
JB		 2225}
2226
2227
f698d856 2228static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2229 struct sk_buff *skb)
f0706e82 2230{
af6b6374 2231 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2232 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2233 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2234 size_t baselen, len = skb->len;
ae6a44e3
EK		 2235 struct ieee802_11_elems elems;
2236
15b7b062
KV		 2237 ifmgd = &sdata->u.mgd;
2238
77fdaa12
JB		 2239 ASSERT_MGD_MTX(ifmgd);
2240
888d04df 2241 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2242 return; /* ignore ProbeResp to foreign address */
2243
ae6a44e3
EK		 2244 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2245 if (baselen > len)
2246 return;
2247
2248 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2249 &elems);
2250
98c8fccf 2251 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2252
77fdaa12 2253 if (ifmgd->associated &&
888d04df 2254 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2255 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2256
2257 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2258 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2259 == 0) {
66e67e41
JB		 2260 /* got probe response, continue with auth */
2261 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2262 ifmgd->auth_data->tries = 0;
2263 ifmgd->auth_data->timeout = jiffies;
2264 run_again(ifmgd, ifmgd->auth_data->timeout);
2265 }
f0706e82
JB		 2266}
2267
d91f36db
JB		 2268/*
2269 * This is the canonical list of information elements we care about,
2270 * the filter code also gives us all changes to the Microsoft OUI
2271 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2272 *
2273 * We implement beacon filtering in software since that means we can
2274 * avoid processing the frame here and in cfg80211, and userspace
2275 * will not be able to tell whether the hardware supports it or not.
2276 *
2277 * XXX: This list needs to be dynamic -- userspace needs to be able to
2278 * add items it requires. It also needs to be able to tell us to
2279 * look out for other vendor IEs.
2280 */
2281static const u64 care_about_ies =
1d4df3a5
JB		 2282 (1ULL << WLAN_EID_COUNTRY) |
2283 (1ULL << WLAN_EID_ERP_INFO) |
2284 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2285 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2286 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2287 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2288
f698d856 2289static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2290 struct ieee80211_mgmt *mgmt,
2291 size_t len,
2292 struct ieee80211_rx_status *rx_status)
2293{
d91f36db 2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2295 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2296 size_t baselen;
2297 struct ieee802_11_elems elems;
f698d856 2298 struct ieee80211_local *local = sdata->local;
471b3efd 2299 u32 changed = 0;
d91f36db 2300 bool erp_valid, directed_tim = false;
7a5158ef 2301 u8 erp_value = 0;
d91f36db 2302 u32 ncrc;
77fdaa12
JB		 2303 u8 *bssid;
2304
66e67e41 2305 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2306
ae6a44e3
EK		 2307 /* Process beacon from the current BSS */
2308 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2309 if (baselen > len)
2310 return;
2311
d91f36db 2312 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2313 return;
f0706e82 2314
66e67e41 2315 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2316 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2317 == 0) {
66e67e41
JB		 2318 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2319 len - baselen, &elems);
77fdaa12 2320
66e67e41
JB		 2321 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2322 false);
2323 ifmgd->assoc_data->have_beacon = true;
2324 ifmgd->assoc_data->sent_assoc = false;
2325 /* continue assoc process */
2326 ifmgd->assoc_data->timeout = jiffies;
2327 run_again(ifmgd, ifmgd->assoc_data->timeout);
2328 return;
2329 }
77fdaa12 2330
66e67e41 2331 if (!ifmgd->associated ||
888d04df 2332 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2333 return;
66e67e41 2334 bssid = ifmgd->associated->bssid;
f0706e82 2335
17e4ec14
JM		 2336 /* Track average RSSI from the Beacon frames of the current AP */
2337 ifmgd->last_beacon_signal = rx_status->signal;
2338 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2339 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2340 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2341 ifmgd->last_cqm_event_signal = 0;
391a200a 2342 ifmgd->count_beacon_signal = 1;
615f7b9b 2343 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2344 } else {
2345 ifmgd->ave_beacon_signal =
2346 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2347 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2348 ifmgd->ave_beacon_signal) / 16;
391a200a 2349 ifmgd->count_beacon_signal++;
17e4ec14 2350 }
615f7b9b
MV		 2351
2352 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2353 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2354 int sig = ifmgd->ave_beacon_signal;
2355 int last_sig = ifmgd->last_ave_beacon_signal;
2356
2357 /*
2358 * if signal crosses either of the boundaries, invoke callback
2359 * with appropriate parameters
2360 */
2361 if (sig > ifmgd->rssi_max_thold &&
2362 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2363 ifmgd->last_ave_beacon_signal = sig;
2364 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2365 } else if (sig < ifmgd->rssi_min_thold &&
2366 (last_sig >= ifmgd->rssi_max_thold ||
2367 last_sig == 0)) {
2368 ifmgd->last_ave_beacon_signal = sig;
2369 drv_rssi_callback(local, RSSI_EVENT_LOW);
2370 }
2371 }
2372
17e4ec14 2373 if (bss_conf->cqm_rssi_thold &&
391a200a 2374 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2375 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2376 int sig = ifmgd->ave_beacon_signal / 16;
2377 int last_event = ifmgd->last_cqm_event_signal;
2378 int thold = bss_conf->cqm_rssi_thold;
2379 int hyst = bss_conf->cqm_rssi_hyst;
2380 if (sig < thold &&
2381 (last_event == 0 || sig < last_event - hyst)) {
2382 ifmgd->last_cqm_event_signal = sig;
2383 ieee80211_cqm_rssi_notify(
2384 &sdata->vif,
2385 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2386 GFP_KERNEL);
2387 } else if (sig > thold &&
2388 (last_event == 0 || sig > last_event + hyst)) {
2389 ifmgd->last_cqm_event_signal = sig;
2390 ieee80211_cqm_rssi_notify(
2391 &sdata->vif,
2392 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2393 GFP_KERNEL);
2394 }
2395 }
2396
b291ba11 2397 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2398#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2399 if (net_ratelimit()) {
2400 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2401 "to a received beacon\n", sdata->name);
92778180
JM		 2402 }
2403#endif
b291ba11 2404 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2405 mutex_lock(&local->iflist_mtx);
2406 ieee80211_recalc_ps(local, -1);
2407 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2408 }
2409
b291ba11
JB		 2410 /*
2411 * Push the beacon loss detection into the future since
2412 * we are processing a beacon from the AP just now.
2413 */
d3a910a8 2414 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2415
d91f36db
JB		 2416 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2417 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2418 len - baselen, &elems,
2419 care_about_ies, ncrc);
2420
2421 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2422 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2423 ifmgd->aid);
d91f36db 2424
d8ec4433 2425 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2426 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2427 true);
d91f36db 2428
4ced3f74 2429 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2430 elems.wmm_param_len);
2431 }
fe3fa827 2432
25c9c875 2433 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2434 if (directed_tim) {
572e0012 2435 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2436 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2437 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2438 ieee80211_hw_config(local,
2439 IEEE80211_CONF_CHANGE_PS);
2440 }
572e0012 2441 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2442 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2443 local->pspolling = true;
2444
2445 /*
2446 * Here is assumed that the driver will be
2447 * able to send ps-poll frame and receive a
2448 * response even though power save mode is
2449 * enabled, but some drivers might require
2450 * to disable power save here. This needs
2451 * to be investigated.
2452 */
2453 ieee80211_send_pspoll(local, sdata);
2454 }
a97b77b9
VN		 2455 }
2456 }
7a5158ef 2457
d8ec4433 2458 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2459 return;
2460 ifmgd->beacon_crc = ncrc;
d8ec4433 2461 ifmgd->beacon_crc_valid = true;
30196673 2462
7a5158ef
JB		 2463 if (elems.erp_info && elems.erp_info_len >= 1) {
2464 erp_valid = true;
2465 erp_value = elems.erp_info[0];
2466 } else {
2467 erp_valid = false;
50c4afb9 2468 }
7a5158ef
JB		 2469 changed |= ieee80211_handle_bss_capability(sdata,
2470 le16_to_cpu(mgmt->u.beacon.capab_info),
2471 erp_valid, erp_value);
f0706e82 2472
d3c990fb 2473
074d46d1 2474 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2475 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2476 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2477
2478 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2479
24398e39
JB		 2480 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2481 bssid, true);
d3c990fb
RR		 2482 }
2483
8b19e6ca 2484 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2485 if (elems.country_elem) {
a8302de9
VT		 2486 /* TODO: IBSS also needs this */
2487 if (elems.pwr_constr_elem)
2488 ieee80211_handle_pwr_constr(sdata,
2489 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2490 elems.pwr_constr_elem,
2491 elems.pwr_constr_elem_len);
3f2355cb
LR		 2492 }
2493
471b3efd 2494 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2495}
2496
1fa57d01
JB		 2497void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2498 struct sk_buff *skb)
f0706e82 2499{
77fdaa12 2500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2501 struct ieee80211_rx_status *rx_status;
f0706e82 2502 struct ieee80211_mgmt *mgmt;
66e67e41 2503 struct cfg80211_bss *bss = NULL;
77fdaa12 2504 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2505 u16 fc;
2506
f0706e82
JB		 2507 rx_status = (struct ieee80211_rx_status *) skb->cb;
2508 mgmt = (struct ieee80211_mgmt *) skb->data;
2509 fc = le16_to_cpu(mgmt->frame_control);
2510
77fdaa12
JB		 2511 mutex_lock(&ifmgd->mtx);
2512
66e67e41
JB		 2513 switch (fc & IEEE80211_FCTL_STYPE) {
2514 case IEEE80211_STYPE_BEACON:
2515 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2516 break;
2517 case IEEE80211_STYPE_PROBE_RESP:
2518 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2519 break;
2520 case IEEE80211_STYPE_AUTH:
2521 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2522 break;
2523 case IEEE80211_STYPE_DEAUTH:
2524 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2525 break;
2526 case IEEE80211_STYPE_DISASSOC:
2527 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2528 break;
2529 case IEEE80211_STYPE_ASSOC_RESP:
2530 case IEEE80211_STYPE_REASSOC_RESP:
2531 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2532 break;
2533 case IEEE80211_STYPE_ACTION:
2534 switch (mgmt->u.action.category) {
2535 case WLAN_CATEGORY_SPECTRUM_MGMT:
2536 ieee80211_sta_process_chanswitch(sdata,
2537 &mgmt->u.action.u.chan_switch.sw_elem,
2538 (void *)ifmgd->associated->priv,
2539 rx_status->mactime);
77fdaa12 2540 break;
77fdaa12 2541 }
77fdaa12 2542 }
77fdaa12
JB		 2543 mutex_unlock(&ifmgd->mtx);
2544
66e67e41
JB		 2545 switch (rma) {
2546 case RX_MGMT_NONE:
2547 /* no action */
2548 break;
2549 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2550 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2551 break;
2552 case RX_MGMT_CFG80211_DISASSOC:
2553 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2554 break;
2555 case RX_MGMT_CFG80211_RX_AUTH:
2556 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2557 break;
2558 case RX_MGMT_CFG80211_RX_ASSOC:
2559 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2560 break;
2561 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2562 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2563 break;
2564 default:
2565 WARN(1, "unexpected: %d", rma);
b054b747 2566 }
f0706e82
JB		 2567}
2568
9c6bd790 2569static void ieee80211_sta_timer(unsigned long data)
f0706e82 2570{
60f8b39c
JB		 2571 struct ieee80211_sub_if_data *sdata =
2572 (struct ieee80211_sub_if_data *) data;
46900298 2573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2574 struct ieee80211_local *local = sdata->local;
f0706e82 2575
5bb644a0
JB		 2576 if (local->quiescing) {
2577 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2578 return;
2579 }
2580
64592c8f 2581 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2582}
2583
04ac3c0e 2584static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2585 u8 *bssid, u8 reason)
04ac3c0e
FF		 2586{
2587 struct ieee80211_local *local = sdata->local;
2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2589 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2590
2591 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2592 IEEE80211_STA_BEACON_POLL);
2593
37ad3888
JB		 2594 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2595 false, frame_buf);
04ac3c0e 2596 mutex_unlock(&ifmgd->mtx);
37ad3888 2597
04ac3c0e
FF		 2598 /*
2599 * must be outside lock due to cfg80211,
2600 * but that's not a problem.
2601 */
5fef7dbc 2602 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2603
2604 mutex_lock(&local->mtx);
2605 ieee80211_recalc_idle(local);
2606 mutex_unlock(&local->mtx);
2607
04ac3c0e
FF		 2608 mutex_lock(&ifmgd->mtx);
2609}
2610
66e67e41
JB		 2611static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2612{
2613 struct ieee80211_local *local = sdata->local;
2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2616
2617 lockdep_assert_held(&ifmgd->mtx);
2618
2619 if (WARN_ON_ONCE(!auth_data))
2620 return -EINVAL;
2621
66e67e41
JB		 2622 auth_data->tries++;
2623
2624 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2625 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2626 sdata->name, auth_data->bss->bssid);
2627
2628 /*
2629 * Most likely AP is not in the range so remove the
2630 * bss struct for that AP.
2631 */
2632 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2633
2634 return -ETIMEDOUT;
2635 }
2636
2637 if (auth_data->bss->proberesp_ies) {
2638 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2639 sdata->name, auth_data->bss->bssid, auth_data->tries,
2640 IEEE80211_AUTH_MAX_TRIES);
2641
2642 auth_data->expected_transaction = 2;
2643 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2644 auth_data->ie, auth_data->ie_len,
2645 auth_data->bss->bssid,
2646 auth_data->bss->bssid, NULL, 0, 0);
2647 } else {
2648 const u8 *ssidie;
2649
2650 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2651 sdata->name, auth_data->bss->bssid, auth_data->tries,
2652 IEEE80211_AUTH_MAX_TRIES);
2653
2654 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2655 if (!ssidie)
2656 return -EINVAL;
2657 /*
2658 * Direct probe is sent to broadcast address as some APs
2659 * will not answer to direct packet in unassociated state.
2660 */
2661 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2662 NULL, 0, (u32) -1, true, false);
2663 }
2664
2665 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2666 run_again(ifmgd, auth_data->timeout);
2667
2668 return 0;
2669}
2670
2671static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2672{
2673 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2674 struct ieee80211_local *local = sdata->local;
2675
2676 lockdep_assert_held(&sdata->u.mgd.mtx);
2677
66e67e41
JB		 2678 assoc_data->tries++;
2679 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2680 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2681 sdata->name, assoc_data->bss->bssid);
2682
2683 /*
2684 * Most likely AP is not in the range so remove the
2685 * bss struct for that AP.
2686 */
2687 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2688
2689 return -ETIMEDOUT;
2690 }
2691
2692 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2693 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2694 IEEE80211_ASSOC_MAX_TRIES);
2695 ieee80211_send_assoc(sdata);
2696
2697 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2698 run_again(&sdata->u.mgd, assoc_data->timeout);
2699
2700 return 0;
2701}
2702
1fa57d01 2703void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2704{
9c6bd790 2705 struct ieee80211_local *local = sdata->local;
1fa57d01 2706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2707
77fdaa12
JB		 2708 mutex_lock(&ifmgd->mtx);
2709
66e67e41
JB		 2710 if (ifmgd->auth_data &&
2711 time_after(jiffies, ifmgd->auth_data->timeout)) {
2712 if (ifmgd->auth_data->done) {
2713 /*
2714 * ok ... we waited for assoc but userspace didn't,
2715 * so let's just kill the auth data
2716 */
2717 ieee80211_destroy_auth_data(sdata, false);
2718 } else if (ieee80211_probe_auth(sdata)) {
2719 u8 bssid[ETH_ALEN];
2720
2721 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2722
2723 ieee80211_destroy_auth_data(sdata, false);
2724
2725 mutex_unlock(&ifmgd->mtx);
2726 cfg80211_send_auth_timeout(sdata->dev, bssid);
2727 mutex_lock(&ifmgd->mtx);
2728 }
2729 } else if (ifmgd->auth_data)
2730 run_again(ifmgd, ifmgd->auth_data->timeout);
2731
2732 if (ifmgd->assoc_data &&
2733 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2734 if (!ifmgd->assoc_data->have_beacon ||
2735 ieee80211_do_assoc(sdata)) {
2736 u8 bssid[ETH_ALEN];
2737
2738 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2739
2740 ieee80211_destroy_assoc_data(sdata, false);
2741
2742 mutex_unlock(&ifmgd->mtx);
2743 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2744 mutex_lock(&ifmgd->mtx);
2745 }
2746 } else if (ifmgd->assoc_data)
2747 run_again(ifmgd, ifmgd->assoc_data->timeout);
2748
b291ba11
JB		 2749 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2750 IEEE80211_STA_CONNECTION_POLL) &&
2751 ifmgd->associated) {
a43abf29 2752 u8 bssid[ETH_ALEN];
72a8a3ed 2753 int max_tries;
a43abf29 2754
0c1ad2ca 2755 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2756
72a8a3ed 2757 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2758 max_tries = max_nullfunc_tries;
72a8a3ed 2759 else
180205bd 2760 max_tries = max_probe_tries;
72a8a3ed 2761
4e5ff376
FF		 2762 /* ACK received for nullfunc probing frame */
2763 if (!ifmgd->probe_send_count)
2764 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2765 else if (ifmgd->nullfunc_failed) {
2766 if (ifmgd->probe_send_count < max_tries) {
2767#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2768 wiphy_debug(local->hw.wiphy,
2769 "%s: No ack for nullfunc frame to"
bfc31df3 2770 " AP %pM, try %d/%i\n",
04ac3c0e 2771 sdata->name, bssid,
bfc31df3 2772 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2773#endif
2774 ieee80211_mgd_probe_ap_send(sdata);
2775 } else {
2776#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2777 wiphy_debug(local->hw.wiphy,
2778 "%s: No ack for nullfunc frame to"
2779 " AP %pM, disconnecting.\n",
c658e5db 2780 sdata->name, bssid);
04ac3c0e 2781#endif
95acac61
JB		 2782 ieee80211_sta_connection_lost(sdata, bssid,
2783 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2784 }
2785 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2786 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2787 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2788#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2789 wiphy_debug(local->hw.wiphy,
2790 "%s: Failed to send nullfunc to AP %pM"
2791 " after %dms, disconnecting.\n",
2792 sdata->name,
180205bd 2793 bssid, probe_wait_ms);
04ac3c0e 2794#endif
95acac61
JB		 2795 ieee80211_sta_connection_lost(sdata, bssid,
2796 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2797 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2798#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2799 wiphy_debug(local->hw.wiphy,
2800 "%s: No probe response from AP %pM"
bfc31df3 2801 " after %dms, try %d/%i\n",
b38afa87 2802 sdata->name,
180205bd 2803 bssid, probe_wait_ms,
bfc31df3 2804 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2805#endif
2806 ieee80211_mgd_probe_ap_send(sdata);
2807 } else {
b291ba11
JB		 2808 /*
2809 * We actually lost the connection ... or did we?
2810 * Let's make sure!
2811 */
b38afa87
BG		 2812 wiphy_debug(local->hw.wiphy,
2813 "%s: No probe response from AP %pM"
2814 " after %dms, disconnecting.\n",
2815 sdata->name,
180205bd 2816 bssid, probe_wait_ms);
04ac3c0e 2817
95acac61
JB		 2818 ieee80211_sta_connection_lost(sdata, bssid,
2819 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2820 }
2821 }
2822
77fdaa12 2823 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2824
2825 mutex_lock(&local->mtx);
2826 ieee80211_recalc_idle(local);
2827 mutex_unlock(&local->mtx);
f0706e82
JB		 2828}
2829
b291ba11
JB		 2830static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2831{
2832 struct ieee80211_sub_if_data *sdata =
2833 (struct ieee80211_sub_if_data *) data;
2834 struct ieee80211_local *local = sdata->local;
2835
2836 if (local->quiescing)
2837 return;
2838
1e4dcd01
JO		 2839 ieee80211_queue_work(&sdata->local->hw,
2840 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2841}
2842
2843static void ieee80211_sta_conn_mon_timer(unsigned long data)
2844{
2845 struct ieee80211_sub_if_data *sdata =
2846 (struct ieee80211_sub_if_data *) data;
2847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2848 struct ieee80211_local *local = sdata->local;
2849
2850 if (local->quiescing)
2851 return;
2852
42935eca 2853 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2854}
2855
2856static void ieee80211_sta_monitor_work(struct work_struct *work)
2857{
2858 struct ieee80211_sub_if_data *sdata =
2859 container_of(work, struct ieee80211_sub_if_data,
2860 u.mgd.monitor_work);
2861
2862 ieee80211_mgd_probe_ap(sdata, false);
2863}
2864
9c6bd790
JB		 2865static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2866{
494f1fe5
EP		 2867 u32 flags;
2868
ad935687 2869 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2870 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2871 IEEE80211_STA_CONNECTION_POLL);
ad935687 2872
b291ba11 2873 /* let's probe the connection once */
494f1fe5
EP		 2874 flags = sdata->local->hw.flags;
2875 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2876 ieee80211_queue_work(&sdata->local->hw,
2877 &sdata->u.mgd.monitor_work);
b291ba11 2878 /* and do all the other regular work too */
64592c8f 2879 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2880 }
9c6bd790 2881}
f0706e82 2882
5bb644a0
JB		 2883#ifdef CONFIG_PM
2884void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2885{
2886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2887
2888 /*
2889 * we need to use atomic bitops for the running bits
2890 * only because both timers might fire at the same
2891 * time -- the code here is properly synchronised.
2892 */
2893
d1f5b7a3
JB		 2894 cancel_work_sync(&ifmgd->request_smps_work);
2895
0ecfe806 2896 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2897 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2898 if (del_timer_sync(&ifmgd->timer))
2899 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2900
2901 cancel_work_sync(&ifmgd->chswitch_work);
2902 if (del_timer_sync(&ifmgd->chswitch_timer))
2903 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2904
b291ba11
JB		 2905 /* these will just be re-established on connection */
2906 del_timer_sync(&ifmgd->conn_mon_timer);
2907 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2908}
2909
2910void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2911{
2912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2913
676b58c2
RM		 2914 if (!ifmgd->associated)
2915 return;
2916
95acac61
JB		 2917 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2918 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2919 mutex_lock(&ifmgd->mtx);
2920 if (ifmgd->associated) {
2921#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2922 wiphy_debug(sdata->local->hw.wiphy,
2923 "%s: driver requested disconnect after resume.\n",
2924 sdata->name);
2925#endif
2926 ieee80211_sta_connection_lost(sdata,
2927 ifmgd->associated->bssid,
2928 WLAN_REASON_UNSPECIFIED);
2929 mutex_unlock(&ifmgd->mtx);
2930 return;
2931 }
2932 mutex_unlock(&ifmgd->mtx);
2933 }
2934
5bb644a0
JB		 2935 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2936 add_timer(&ifmgd->timer);
2937 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2938 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2939 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2940 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2941}
2942#endif
2943
9c6bd790
JB		 2944/* interface setup */
2945void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2946{
46900298 2947 struct ieee80211_if_managed *ifmgd;
988c0f72 2948
46900298 2949 ifmgd = &sdata->u.mgd;
b291ba11 2950 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2951 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2952 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2953 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2954 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2955 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2956 (unsigned long) sdata);
b291ba11
JB		 2957 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2958 (unsigned long) sdata);
2959 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2960 (unsigned long) sdata);
46900298 2961 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2962 (unsigned long) sdata);
9c6bd790 2963
ab1faead 2964 ifmgd->flags = 0;
1478acb3 2965 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2966 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2967 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2968
77fdaa12 2969 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2970
2971 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2972 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2973 else
2974 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2975}
2976
77fdaa12
JB		 2977/* scan finished notification */
2978void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2979{
77fdaa12 2980 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2981
77fdaa12
JB		 2982 /* Restart STA timers */
2983 rcu_read_lock();
2984 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2985 ieee80211_restart_sta_timer(sdata);
2986 rcu_read_unlock();
2987}
60f8b39c 2988
77fdaa12
JB		 2989int ieee80211_max_network_latency(struct notifier_block *nb,
2990 unsigned long data, void *dummy)
2991{
2992 s32 latency_usec = (s32) data;
2993 struct ieee80211_local *local =
2994 container_of(nb, struct ieee80211_local,
2995 network_latency_notifier);
1fa6f4af 2996
77fdaa12
JB		 2997 mutex_lock(&local->iflist_mtx);
2998 ieee80211_recalc_ps(local, latency_usec);
2999 mutex_unlock(&local->iflist_mtx);
dfe67012 3000
77fdaa12 3001 return 0;
9c6bd790
JB		 3002}
3003
a1cf775d 3004static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3005 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3006{
3007 struct ieee80211_local *local = sdata->local;
3008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3009 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3010 struct sta_info *sta;
3011 bool have_sta = false;
3012 int err;
24398e39
JB		 3013 int ht_cfreq;
3014 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3015 const u8 *ht_oper_ie;
3016 const struct ieee80211_ht_operation *ht_oper = NULL;
3017 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3018
3019 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3020 return -EINVAL;
3021
3022 if (assoc) {
3023 rcu_read_lock();
5d6a1b06 3024 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3025 rcu_read_unlock();
3026 }
3027
3028 if (!have_sta) {
5d6a1b06 3029 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3030 if (!sta)
3031 return -ENOMEM;
3032 }
3033
3034 mutex_lock(&local->mtx);
3035 ieee80211_recalc_idle(sdata->local);
3036 mutex_unlock(&local->mtx);
3037
3038 /* switch to the right channel */
24398e39
JB		 3039 sband = local->hw.wiphy->bands[cbss->channel->band];
3040
3041 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3042
3043 if (sband->ht_cap.ht_supported) {
3044 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3045 cbss->information_elements,
3046 cbss->len_information_elements);
3047 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3048 ht_oper = (void *)(ht_oper_ie + 2);
3049 }
3050
3051 if (ht_oper) {
3052 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3053 cbss->channel->band);
3054 /* check that channel matches the right operating channel */
3055 if (cbss->channel->center_freq != ht_cfreq) {
3056 /*
3057 * It's possible that some APs are confused here;
3058 * Netgear WNDR3700 sometimes reports 4 higher than
3059 * the actual channel in association responses, but
3060 * since we look at probe response/beacon data here
3061 * it should be OK.
3062 */
3063 printk(KERN_DEBUG
3064 "%s: Wrong control channel: center-freq: %d"
3065 " ht-cfreq: %d ht->primary_chan: %d"
3066 " band: %d. Disabling HT.\n",
3067 sdata->name, cbss->channel->center_freq,
3068 ht_cfreq, ht_oper->primary_chan,
3069 cbss->channel->band);
3070 ht_oper = NULL;
3071 }
3072 }
3073
3074 if (ht_oper) {
3075 channel_type = NL80211_CHAN_HT20;
3076
3077 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3078 switch (ht_oper->ht_param &
3079 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3080 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3081 channel_type = NL80211_CHAN_HT40PLUS;
3082 break;
3083 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3084 channel_type = NL80211_CHAN_HT40MINUS;
3085 break;
3086 }
3087 }
3088 }
3089
3090 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3091 /* can only fail due to HT40+/- mismatch */
3092 channel_type = NL80211_CHAN_HT20;
3093 printk(KERN_DEBUG
3094 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3095 sdata->name);
3096 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3097 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3098 channel_type));
3099 }
3100
5d6a1b06 3101 local->oper_channel = cbss->channel;
24398e39 3102 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3103
3104 if (!have_sta) {
5d6a1b06
JB		 3105 u32 rates = 0, basic_rates = 0;
3106 bool have_higher_than_11mbit;
3107 int min_rate = INT_MAX, min_rate_index = -1;
3108
5d6a1b06
JB		 3109 ieee80211_get_rates(sband, bss->supp_rates,
3110 bss->supp_rates_len,
3111 &rates, &basic_rates,
3112 &have_higher_than_11mbit,
3113 &min_rate, &min_rate_index);
3114
3115 /*
3116 * This used to be a workaround for basic rates missing
3117 * in the association response frame. Now that we no
3118 * longer use the basic rates from there, it probably
3119 * doesn't happen any more, but keep the workaround so
3120 * in case some *other* APs are buggy in different ways
3121 * we can connect -- with a warning.
3122 */
3123 if (!basic_rates && min_rate_index >= 0) {
3124 printk(KERN_DEBUG
3125 "%s: No basic rates, using min rate instead.\n",
3126 sdata->name);
3127 basic_rates = BIT(min_rate_index);
3128 }
3129
3130 sta->sta.supp_rates[cbss->channel->band] = rates;
3131 sdata->vif.bss_conf.basic_rates = basic_rates;
3132
3133 /* cf. IEEE 802.11 9.2.12 */
3134 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3135 have_higher_than_11mbit)
3136 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3137 else
3138 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3139
3140 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3141
3142 /* tell driver about BSSID and basic rates */
3143 ieee80211_bss_info_change_notify(sdata,
3144 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3145
3146 if (assoc)
3147 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3148
3149 err = sta_info_insert(sta);
3150 sta = NULL;
3151 if (err) {
3152 printk(KERN_DEBUG
3153 "%s: failed to insert STA entry for the AP (error %d)\n",
3154 sdata->name, err);
3155 return err;
3156 }
3157 } else
5d6a1b06 3158 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3159
3160 return 0;
3161}
3162
77fdaa12
JB		 3163/* config hooks */
3164int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3165 struct cfg80211_auth_request *req)
9c6bd790 3166{
66e67e41
JB		 3167 struct ieee80211_local *local = sdata->local;
3168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3169 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3170 u16 auth_alg;
66e67e41
JB		 3171 int err;
3172
3173 /* prepare auth data structure */
9c6bd790 3174
77fdaa12
JB		 3175 switch (req->auth_type) {
3176 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3177 auth_alg = WLAN_AUTH_OPEN;
3178 break;
3179 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3180 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3181 return -EOPNOTSUPP;
77fdaa12
JB		 3182 auth_alg = WLAN_AUTH_SHARED_KEY;
3183 break;
3184 case NL80211_AUTHTYPE_FT:
3185 auth_alg = WLAN_AUTH_FT;
3186 break;
3187 case NL80211_AUTHTYPE_NETWORK_EAP:
3188 auth_alg = WLAN_AUTH_LEAP;
3189 break;
3190 default:
3191 return -EOPNOTSUPP;
60f8b39c 3192 }
77fdaa12 3193
66e67e41
JB		 3194 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3195 if (!auth_data)
9c6bd790 3196 return -ENOMEM;
77fdaa12 3197
66e67e41 3198 auth_data->bss = req->bss;
77fdaa12
JB		 3199
3200 if (req->ie && req->ie_len) {
66e67e41
JB		 3201 memcpy(auth_data->ie, req->ie, req->ie_len);
3202 auth_data->ie_len = req->ie_len;
9c6bd790 3203 }
77fdaa12 3204
fffd0934 3205 if (req->key && req->key_len) {
66e67e41
JB		 3206 auth_data->key_len = req->key_len;
3207 auth_data->key_idx = req->key_idx;
3208 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3209 }
3210
66e67e41 3211 auth_data->algorithm = auth_alg;
60f8b39c 3212
66e67e41 3213 /* try to authenticate/probe */
2a33bee2 3214
66e67e41 3215 mutex_lock(&ifmgd->mtx);
2a33bee2 3216
66e67e41
JB		 3217 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3218 ifmgd->assoc_data) {
3219 err = -EBUSY;
3220 goto err_free;
2a33bee2
GE		 3221 }
3222
66e67e41
JB		 3223 if (ifmgd->auth_data)
3224 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3225
66e67e41
JB		 3226 /* prep auth_data so we don't go into idle on disassoc */
3227 ifmgd->auth_data = auth_data;
af6b6374 3228
66e67e41 3229 if (ifmgd->associated)
37ad3888 3230 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3231
66e67e41
JB		 3232 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3233 sdata->name, req->bss->bssid);
e5b900d2 3234
a1cf775d
JB		 3235 err = ieee80211_prep_connection(sdata, req->bss, false);
3236 if (err)
66e67e41 3237 goto err_clear;
af6b6374 3238
66e67e41
JB		 3239 err = ieee80211_probe_auth(sdata);
3240 if (err) {
66e67e41
JB		 3241 sta_info_destroy_addr(sdata, req->bss->bssid);
3242 goto err_clear;
3243 }
3244
3245 /* hold our own reference */
3246 cfg80211_ref_bss(auth_data->bss);
3247 err = 0;
3248 goto out_unlock;
3249
3250 err_clear:
3251 ifmgd->auth_data = NULL;
3252 err_free:
3253 kfree(auth_data);
3254 out_unlock:
3255 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3256
66e67e41 3257 return err;
af6b6374
JB		 3258}
3259
77fdaa12
JB		 3260int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3261 struct cfg80211_assoc_request *req)
f0706e82 3262{
66e67e41 3263 struct ieee80211_local *local = sdata->local;
77fdaa12 3264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3265 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3266 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3267 struct ieee80211_supported_band *sband;
66e67e41 3268 const u8 *ssidie;
2a33bee2 3269 int i, err;
f0706e82 3270
66e67e41
JB		 3271 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3272 if (!ssidie)
3273 return -EINVAL;
3274
3275 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3276 if (!assoc_data)
3277 return -ENOMEM;
3278
77fdaa12 3279 mutex_lock(&ifmgd->mtx);
9c87ba67 3280
66e67e41 3281 if (ifmgd->associated)
37ad3888 3282 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3283
3284 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3285 err = -EBUSY;
3286 goto err_free;
af6b6374 3287 }
77fdaa12 3288
66e67e41
JB		 3289 if (ifmgd->assoc_data) {
3290 err = -EBUSY;
3291 goto err_free;
3292 }
77fdaa12 3293
66e67e41
JB		 3294 if (ifmgd->auth_data) {
3295 bool match;
3296
3297 /* keep sta info, bssid if matching */
888d04df 3298 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3299 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3300 }
3301
66e67e41
JB		 3302 /* prepare assoc data */
3303
77fdaa12 3304 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3305 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3306
d8ec4433
JO		 3307 ifmgd->beacon_crc_valid = false;
3308
de5036aa
JB		 3309 /*
3310 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3311 * We still associate in non-HT mode (11a/b/g) if any one of these
3312 * ciphers is configured as pairwise.
3313 * We can set this to true for non-11n hardware, that'll be checked
3314 * separately along with the peer capabilities.
3315 */
77fdaa12
JB		 3316 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3317 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3318 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3319 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3320 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3321
ef96a842
BG		 3322 if (req->flags & ASSOC_REQ_DISABLE_HT)
3323 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3324
4e74bfdb
JB		 3325 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3326 sband = local->hw.wiphy->bands[req->bss->channel->band];
3327 if (!sband->ht_cap.ht_supported ||
32c5057b 3328 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
4e74bfdb
JB		 3329 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3330
ef96a842
BG		 3331 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3332 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3333 sizeof(ifmgd->ht_capa_mask));
3334
77fdaa12 3335 if (req->ie && req->ie_len) {
66e67e41
JB		 3336 memcpy(assoc_data->ie, req->ie, req->ie_len);
3337 assoc_data->ie_len = req->ie_len;
3338 }
f679f65d 3339
66e67e41 3340 assoc_data->bss = req->bss;
f679f65d 3341
af6b6374
JB		 3342 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3343 if (ifmgd->powersave)
3344 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3345 else
3346 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3347 } else
3348 ifmgd->ap_smps = ifmgd->req_smps;
3349
66e67e41 3350 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3351 assoc_data->wmm = bss->wmm_used &&
3352 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3353 assoc_data->supp_rates = bss->supp_rates;
3354 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3355 assoc_data->ht_operation_ie =
3356 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3357
ab13315a
KV		 3358 if (bss->wmm_used && bss->uapsd_supported &&
3359 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3360 assoc_data->uapsd = true;
ab13315a
KV		 3361 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3362 } else {
76f0303d 3363 assoc_data->uapsd = false;
ab13315a
KV		 3364 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3365 }
3366
66e67e41
JB		 3367 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3368 assoc_data->ssid_len = ssidie[1];
63f170e0 3369
77fdaa12 3370 if (req->prev_bssid)
66e67e41 3371 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3372
3373 if (req->use_mfp) {
3374 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3375 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3376 } else {
3377 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3378 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3379 }
3380
3381 if (req->crypto.control_port)
3382 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3383 else
3384 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3385
a621fa4d
JB		 3386 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3387 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3388
66e67e41
JB		 3389 /* kick off associate process */
3390
3391 ifmgd->assoc_data = assoc_data;
3392
a1cf775d
JB		 3393 err = ieee80211_prep_connection(sdata, req->bss, true);
3394 if (err)
3395 goto err_clear;
66e67e41
JB		 3396
3397 if (!bss->dtim_period &&
3398 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3399 /*
3400 * Wait up to one beacon interval ...
3401 * should this be more if we miss one?
3402 */
3403 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3404 sdata->name, ifmgd->bssid);
3f9768a5 3405 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3406 } else {
3407 assoc_data->have_beacon = true;
3408 assoc_data->sent_assoc = false;
3409 assoc_data->timeout = jiffies;
3410 }
3411 run_again(ifmgd, assoc_data->timeout);
3412
fcff4f10
PS		 3413 if (bss->corrupt_data) {
3414 char *corrupt_type = "data";
3415 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3416 if (bss->corrupt_data &
3417 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3418 corrupt_type = "beacon and probe response";
3419 else
3420 corrupt_type = "beacon";
3421 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3422 corrupt_type = "probe response";
3423 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3424 sdata->name, corrupt_type);
3425 }
3426
66e67e41
JB		 3427 err = 0;
3428 goto out;
3429 err_clear:
3430 ifmgd->assoc_data = NULL;
3431 err_free:
3432 kfree(assoc_data);
3433 out:
3434 mutex_unlock(&ifmgd->mtx);
3435
3436 return err;
f0706e82
JB		 3437}
3438
77fdaa12 3439int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3440 struct cfg80211_deauth_request *req)
f0706e82 3441{
46900298 3442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3443 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3444
77fdaa12
JB		 3445 mutex_lock(&ifmgd->mtx);
3446
37ad3888 3447 if (ifmgd->auth_data) {
66e67e41 3448 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3449 mutex_unlock(&ifmgd->mtx);
66e67e41 3450 return 0;
af6b6374 3451 }
77fdaa12 3452
37ad3888
JB		 3453 printk(KERN_DEBUG
3454 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3455 sdata->name, req->bssid, req->reason_code);
0ff71613 3456
37ad3888 3457 if (ifmgd->associated &&
888d04df 3458 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3459 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3460 req->reason_code, true, frame_buf);
37ad3888
JB		 3461 else
3462 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3463 IEEE80211_STYPE_DEAUTH,
3464 req->reason_code, true,
3465 frame_buf);
3466 mutex_unlock(&ifmgd->mtx);
3467
5fef7dbc 3468 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3469
7da7cc1d 3470 mutex_lock(&sdata->local->mtx);
bc83b681 3471 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3472 mutex_unlock(&sdata->local->mtx);
bc83b681 3473
f0706e82
JB		 3474 return 0;
3475}
84363e6e 3476
77fdaa12 3477int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3478 struct cfg80211_disassoc_request *req)
9c6bd790 3479{
77fdaa12 3480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3481 u8 bssid[ETH_ALEN];
5fef7dbc 3482 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3483
77fdaa12 3484 mutex_lock(&ifmgd->mtx);
10f644a4 3485
8d8b261a
JB		 3486 /*
3487 * cfg80211 should catch this ... but it's racy since
3488 * we can receive a disassoc frame, process it, hand it
3489 * to cfg80211 while that's in a locked section already
3490 * trying to tell us that the user wants to disconnect.
3491 */
0c1ad2ca 3492 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3493 mutex_unlock(&ifmgd->mtx);
3494 return -ENOLINK;
3495 }
3496
0ff71613 3497 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3498 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3499
e69e95db 3500 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3501 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3502 req->reason_code, !req->local_state_change,
3503 frame_buf);
77fdaa12 3504 mutex_unlock(&ifmgd->mtx);
10f644a4 3505
5fef7dbc 3506 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3507
7da7cc1d 3508 mutex_lock(&sdata->local->mtx);
bc83b681 3509 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3510 mutex_unlock(&sdata->local->mtx);
bc83b681 3511
10f644a4
JB		 3512 return 0;
3513}
026331c4 3514
54e4ffb2
JB		 3515void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3516{
3517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3518
3519 mutex_lock(&ifmgd->mtx);
3520 if (ifmgd->assoc_data)
3521 ieee80211_destroy_assoc_data(sdata, false);
3522 if (ifmgd->auth_data)
3523 ieee80211_destroy_auth_data(sdata, false);
3524 del_timer_sync(&ifmgd->timer);
3525 mutex_unlock(&ifmgd->mtx);
3526}
3527
a97c13c3
JO		 3528void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3529 enum nl80211_cqm_rssi_threshold_event rssi_event,
3530 gfp_t gfp)
3531{
3532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3533
b5878a2d
JB		 3534 trace_api_cqm_rssi_notify(sdata, rssi_event);
3535
a97c13c3
JO		 3536 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3537}
3538EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3539
3540unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3541{
3542 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3543 return sdata->dev->operstate;
3544}
3545EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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