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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth...
[linux-2.6-block.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
d5522e03
JB		 174/*
175 * ieee80211_enable_ht should be called only after the operating band
176 * has been determined as ht configuration depends on the hw's
177 * HT abilities for a specific band.
178 */
179static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
180 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 181 const u8 *bssid, u16 ap_ht_cap_flags,
182 bool beacon_htcap_ie)
d5522e03
JB		 183{
184 struct ieee80211_local *local = sdata->local;
185 struct ieee80211_supported_band *sband;
d5522e03
JB		 186 struct sta_info *sta;
187 u32 changed = 0;
172710bf 188 int hti_cfreq;
9ed6bcce 189 u16 ht_opmode;
0aaffa9b
JB		 190 bool enable_ht = true;
191 enum nl80211_channel_type prev_chantype;
3117bbdb
PS		 192 enum nl80211_channel_type rx_channel_type = NL80211_CHAN_NO_HT;
193 enum nl80211_channel_type tx_channel_type;
d5522e03
JB		 194
195 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
0aaffa9b
JB		 196 prev_chantype = sdata->vif.bss_conf.channel_type;
197
d5522e03 198
4e74bfdb
JB		 199 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
200 sband->band);
201 /* check that channel matches the right operating channel */
202 if (local->hw.conf.channel->center_freq != hti_cfreq) {
203 /* Some APs mess this up, evidently.
204 * Netgear WNDR3700 sometimes reports 4 higher than
205 * the actual channel, for instance.
206 */
207 printk(KERN_DEBUG
208 "%s: Wrong control channel in association"
209 " response: configured center-freq: %d"
210 " hti-cfreq: %d hti->control_chan: %d"
211 " band: %d. Disabling HT.\n",
212 sdata->name,
213 local->hw.conf.channel->center_freq,
214 hti_cfreq, hti->control_chan,
215 sband->band);
216 enable_ht = false;
172710bf 217 }
d5522e03
JB		 218
219 if (enable_ht) {
3117bbdb 220 rx_channel_type = NL80211_CHAN_HT20;
d5522e03
JB		 221
222 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
ef96a842 223 !ieee80111_cfg_override_disables_ht40(sdata) &&
d5522e03
JB		 224 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
225 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
226 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
227 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3117bbdb 228 rx_channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 229 break;
230 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3117bbdb 231 rx_channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 232 break;
233 }
234 }
235 }
236
3117bbdb
PS		 237 tx_channel_type = ieee80211_get_tx_channel_type(local, rx_channel_type);
238
fe6f212c 239 if (local->tmp_channel)
3117bbdb 240 local->tmp_channel_type = rx_channel_type;
d5522e03 241
3117bbdb 242 if (!ieee80211_set_channel_type(local, sdata, rx_channel_type)) {
0aaffa9b 243 /* can only fail due to HT40+/- mismatch */
3117bbdb
PS		 244 rx_channel_type = NL80211_CHAN_HT20;
245 WARN_ON(!ieee80211_set_channel_type(local, sdata,
246 rx_channel_type));
0aaffa9b 247 }
d5522e03 248
3117bbdb 249 if (beacon_htcap_ie && (prev_chantype != rx_channel_type)) {
7cc44ed4
RM		 250 /*
251 * Whenever the AP announces the HT mode change that can be
252 * 40MHz intolerant or etc., it would be safer to stop tx
253 * queues before doing hw config to avoid buffer overflow.
254 */
255 ieee80211_stop_queues_by_reason(&sdata->local->hw,
256 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
257
258 /* flush out all packets */
259 synchronize_net();
260
261 drv_flush(local, false);
262 }
263
0aaffa9b
JB		 264 /* channel_type change automatically detected */
265 ieee80211_hw_config(local, 0);
d5522e03 266
3117bbdb 267 if (prev_chantype != tx_channel_type) {
d5522e03 268 rcu_read_lock();
abe60632 269 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 270 if (sta)
271 rate_control_rate_update(local, sband, sta,
4fa00437 272 IEEE80211_RC_HT_CHANGED,
3117bbdb 273 tx_channel_type);
d5522e03 274 rcu_read_unlock();
7cc44ed4
RM		 275
276 if (beacon_htcap_ie)
277 ieee80211_wake_queues_by_reason(&sdata->local->hw,
278 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 279 }
d5522e03 280
9ed6bcce 281 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 282
283 /* if bss configuration changed store the new one */
0aaffa9b
JB		 284 if (sdata->ht_opmode_valid != enable_ht ||
285 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
3117bbdb 286 prev_chantype != rx_channel_type) {
d5522e03 287 changed |= BSS_CHANGED_HT;
9ed6bcce 288 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 289 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 290 }
291
292 return changed;
293}
294
9c6bd790
JB		 295/* frame sending functions */
296
66e67e41
JB		 297static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
298 struct ieee80211_supported_band *sband,
299 u32 *rates)
300{
301 int i, j, count;
302 *rates = 0;
303 count = 0;
304 for (i = 0; i < supp_rates_len; i++) {
305 int rate = (supp_rates[i] & 0x7F) * 5;
306
307 for (j = 0; j < sband->n_bitrates; j++)
308 if (sband->bitrates[j].bitrate == rate) {
309 *rates |= BIT(j);
310 count++;
311 break;
312 }
313 }
314
315 return count;
316}
317
318static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
319 struct sk_buff *skb, const u8 *ht_info_ie,
320 struct ieee80211_supported_band *sband,
321 struct ieee80211_channel *channel,
322 enum ieee80211_smps_mode smps)
323{
324 struct ieee80211_ht_info *ht_info;
325 u8 *pos;
326 u32 flags = channel->flags;
327 u16 cap;
328 struct ieee80211_sta_ht_cap ht_cap;
329
330 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
331
66e67e41
JB		 332 if (!ht_info_ie)
333 return;
334
335 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
336 return;
337
338 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
339 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
340
341 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
342
343 /* determine capability flags */
344 cap = ht_cap.cap;
345
346 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
347 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
348 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
349 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
350 cap &= ~IEEE80211_HT_CAP_SGI_40;
351 }
352 break;
353 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
354 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
355 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
356 cap &= ~IEEE80211_HT_CAP_SGI_40;
357 }
358 break;
359 }
360
361 /* set SM PS mode properly */
362 cap &= ~IEEE80211_HT_CAP_SM_PS;
363 switch (smps) {
364 case IEEE80211_SMPS_AUTOMATIC:
365 case IEEE80211_SMPS_NUM_MODES:
366 WARN_ON(1);
367 case IEEE80211_SMPS_OFF:
368 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
369 IEEE80211_HT_CAP_SM_PS_SHIFT;
370 break;
371 case IEEE80211_SMPS_STATIC:
372 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
373 IEEE80211_HT_CAP_SM_PS_SHIFT;
374 break;
375 case IEEE80211_SMPS_DYNAMIC:
376 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
377 IEEE80211_HT_CAP_SM_PS_SHIFT;
378 break;
379 }
380
381 /* reserve and fill IE */
382 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
383 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
384}
385
386static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
387{
388 struct ieee80211_local *local = sdata->local;
389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
390 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
391 struct sk_buff *skb;
392 struct ieee80211_mgmt *mgmt;
393 u8 *pos, qos_info;
394 size_t offset = 0, noffset;
395 int i, count, rates_len, supp_rates_len;
396 u16 capab;
397 struct ieee80211_supported_band *sband;
398 u32 rates = 0;
66e67e41
JB		 399
400 lockdep_assert_held(&ifmgd->mtx);
401
402 sband = local->hw.wiphy->bands[local->oper_channel->band];
403
404 if (assoc_data->supp_rates_len) {
405 /*
406 * Get all rates supported by the device and the AP as
407 * some APs don't like getting a superset of their rates
408 * in the association request (e.g. D-Link DAP 1353 in
409 * b-only mode)...
410 */
411 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
412 assoc_data->supp_rates_len,
413 sband, &rates);
414 } else {
415 /*
416 * In case AP not provide any supported rates information
417 * before association, we send information element(s) with
418 * all rates that we support.
419 */
420 rates = ~0;
421 rates_len = sband->n_bitrates;
422 }
423
424 skb = alloc_skb(local->hw.extra_tx_headroom +
425 sizeof(*mgmt) + /* bit too much but doesn't matter */
426 2 + assoc_data->ssid_len + /* SSID */
427 4 + rates_len + /* (extended) rates */
428 4 + /* power capability */
429 2 + 2 * sband->n_channels + /* supported channels */
430 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
431 assoc_data->ie_len + /* extra IEs */
432 9, /* WMM */
433 GFP_KERNEL);
434 if (!skb)
435 return;
436
437 skb_reserve(skb, local->hw.extra_tx_headroom);
438
439 capab = WLAN_CAPABILITY_ESS;
440
441 if (sband->band == IEEE80211_BAND_2GHZ) {
442 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
443 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
444 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
445 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
446 }
447
448 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
449 capab |= WLAN_CAPABILITY_PRIVACY;
450
451 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
452 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
453 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
454
455 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
456 memset(mgmt, 0, 24);
457 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
458 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
459 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
460
461 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
462 skb_put(skb, 10);
463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
464 IEEE80211_STYPE_REASSOC_REQ);
465 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
466 mgmt->u.reassoc_req.listen_interval =
467 cpu_to_le16(local->hw.conf.listen_interval);
468 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
469 ETH_ALEN);
470 } else {
471 skb_put(skb, 4);
472 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
473 IEEE80211_STYPE_ASSOC_REQ);
474 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
475 mgmt->u.assoc_req.listen_interval =
476 cpu_to_le16(local->hw.conf.listen_interval);
477 }
478
479 /* SSID */
480 pos = skb_put(skb, 2 + assoc_data->ssid_len);
481 *pos++ = WLAN_EID_SSID;
482 *pos++ = assoc_data->ssid_len;
483 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
484
485 /* add all rates which were marked to be used above */
486 supp_rates_len = rates_len;
487 if (supp_rates_len > 8)
488 supp_rates_len = 8;
489
490 pos = skb_put(skb, supp_rates_len + 2);
491 *pos++ = WLAN_EID_SUPP_RATES;
492 *pos++ = supp_rates_len;
493
494 count = 0;
495 for (i = 0; i < sband->n_bitrates; i++) {
496 if (BIT(i) & rates) {
497 int rate = sband->bitrates[i].bitrate;
498 *pos++ = (u8) (rate / 5);
499 if (++count == 8)
500 break;
501 }
502 }
503
504 if (rates_len > count) {
505 pos = skb_put(skb, rates_len - count + 2);
506 *pos++ = WLAN_EID_EXT_SUPP_RATES;
507 *pos++ = rates_len - count;
508
509 for (i++; i < sband->n_bitrates; i++) {
510 if (BIT(i) & rates) {
511 int rate = sband->bitrates[i].bitrate;
512 *pos++ = (u8) (rate / 5);
513 }
514 }
515 }
516
517 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
518 /* 1. power capabilities */
519 pos = skb_put(skb, 4);
520 *pos++ = WLAN_EID_PWR_CAPABILITY;
521 *pos++ = 2;
522 *pos++ = 0; /* min tx power */
523 *pos++ = local->oper_channel->max_power; /* max tx power */
524
525 /* 2. supported channels */
526 /* TODO: get this in reg domain format */
527 pos = skb_put(skb, 2 * sband->n_channels + 2);
528 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
529 *pos++ = 2 * sband->n_channels;
530 for (i = 0; i < sband->n_channels; i++) {
531 *pos++ = ieee80211_frequency_to_channel(
532 sband->channels[i].center_freq);
533 *pos++ = 1; /* one channel in the subband*/
534 }
535 }
536
537 /* if present, add any custom IEs that go before HT */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 static const u8 before_ht[] = {
540 WLAN_EID_SSID,
541 WLAN_EID_SUPP_RATES,
542 WLAN_EID_EXT_SUPP_RATES,
543 WLAN_EID_PWR_CAPABILITY,
544 WLAN_EID_SUPPORTED_CHANNELS,
545 WLAN_EID_RSN,
546 WLAN_EID_QOS_CAPA,
547 WLAN_EID_RRM_ENABLED_CAPABILITIES,
548 WLAN_EID_MOBILITY_DOMAIN,
549 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
550 };
551 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
552 before_ht, ARRAY_SIZE(before_ht),
553 offset);
554 pos = skb_put(skb, noffset - offset);
555 memcpy(pos, assoc_data->ie + offset, noffset - offset);
556 offset = noffset;
557 }
558
4e74bfdb 559 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
66e67e41
JB		 560 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
561 sband, local->oper_channel, ifmgd->ap_smps);
562
563 /* if present, add any custom non-vendor IEs that go after HT */
564 if (assoc_data->ie_len && assoc_data->ie) {
565 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
566 assoc_data->ie_len,
567 offset);
568 pos = skb_put(skb, noffset - offset);
569 memcpy(pos, assoc_data->ie + offset, noffset - offset);
570 offset = noffset;
571 }
572
76f0303d
JB		 573 if (assoc_data->wmm) {
574 if (assoc_data->uapsd) {
dc41e4d4
EP		 575 qos_info = ifmgd->uapsd_queues;
576 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 577 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
578 } else {
579 qos_info = 0;
580 }
581
582 pos = skb_put(skb, 9);
583 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
584 *pos++ = 7; /* len */
585 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
586 *pos++ = 0x50;
587 *pos++ = 0xf2;
588 *pos++ = 2; /* WME */
589 *pos++ = 0; /* WME info */
590 *pos++ = 1; /* WME ver */
591 *pos++ = qos_info;
592 }
593
594 /* add any remaining custom (i.e. vendor specific here) IEs */
595 if (assoc_data->ie_len && assoc_data->ie) {
596 noffset = assoc_data->ie_len;
597 pos = skb_put(skb, noffset - offset);
598 memcpy(pos, assoc_data->ie + offset, noffset - offset);
599 }
600
601 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
602 ieee80211_tx_skb(sdata, skb);
603}
604
ef422bc0 605static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 606 const u8 *bssid, u16 stype,
5fef7dbc
JB		 607 u16 reason, bool send_frame,
608 u8 *frame_buf)
9ac19a90
JB		 609{
610 struct ieee80211_local *local = sdata->local;
46900298 611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 612 struct sk_buff *skb;
5fef7dbc 613 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 614
5fef7dbc
JB		 615 /* build frame */
616 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
617 mgmt->duration = 0; /* initialize only */
618 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 619 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 620 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 621 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 622 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 623 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
624
5fef7dbc
JB		 625 if (send_frame) {
626 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
627 DEAUTH_DISASSOC_LEN);
628 if (!skb)
629 return;
d5cdfacb 630
5fef7dbc
JB		 631 skb_reserve(skb, local->hw.extra_tx_headroom);
632
633 /* copy in frame */
634 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
635 mgmt, DEAUTH_DISASSOC_LEN);
636
637 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
638 IEEE80211_SKB_CB(skb)->flags |=
639 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 640 ieee80211_tx_skb(sdata, skb);
5fef7dbc 641 }
9ac19a90
JB		 642}
643
572e0012
KV		 644void ieee80211_send_pspoll(struct ieee80211_local *local,
645 struct ieee80211_sub_if_data *sdata)
646{
572e0012
KV		 647 struct ieee80211_pspoll *pspoll;
648 struct sk_buff *skb;
572e0012 649
d8cd189e
KV		 650 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
651 if (!skb)
572e0012 652 return;
572e0012 653
d8cd189e
KV		 654 pspoll = (struct ieee80211_pspoll *) skb->data;
655 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 656
62ae67be
JB		 657 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
658 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 659}
660
965bedad
JB		 661void ieee80211_send_nullfunc(struct ieee80211_local *local,
662 struct ieee80211_sub_if_data *sdata,
663 int powersave)
664{
665 struct sk_buff *skb;
d8cd189e 666 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 668
d8cd189e
KV		 669 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
670 if (!skb)
965bedad 671 return;
965bedad 672
d8cd189e 673 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 674 if (powersave)
d8cd189e 675 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 676
62ae67be 677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 678 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
679 IEEE80211_STA_CONNECTION_POLL))
680 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
681
62ae67be 682 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 683}
684
d524215f
FF		 685static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
686 struct ieee80211_sub_if_data *sdata)
687{
688 struct sk_buff *skb;
689 struct ieee80211_hdr *nullfunc;
690 __le16 fc;
691
692 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
693 return;
694
695 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 696 if (!skb)
d524215f 697 return;
d15b8459 698
d524215f
FF		 699 skb_reserve(skb, local->hw.extra_tx_headroom);
700
701 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
702 memset(nullfunc, 0, 30);
703 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
704 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
705 nullfunc->frame_control = fc;
706 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
707 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
708 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
709 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
710
711 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
712 ieee80211_tx_skb(sdata, skb);
713}
714
cc32abd4
JB		 715/* spectrum management related things */
716static void ieee80211_chswitch_work(struct work_struct *work)
717{
718 struct ieee80211_sub_if_data *sdata =
719 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
721
9607e6b6 722 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 723 return;
724
77fdaa12
JB		 725 mutex_lock(&ifmgd->mtx);
726 if (!ifmgd->associated)
727 goto out;
cc32abd4
JB		 728
729 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 730 if (!sdata->local->ops->channel_switch) {
731 /* call "hw_config" only if doing sw channel switch */
732 ieee80211_hw_config(sdata->local,
733 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 734 } else {
735 /* update the device channel directly */
736 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 737 }
77fdaa12 738
cc32abd4 739 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 740 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 741
cc32abd4
JB		 742 ieee80211_wake_queues_by_reason(&sdata->local->hw,
743 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 744 out:
745 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
746 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 747}
748
5ce6e438
JB		 749void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
750{
751 struct ieee80211_sub_if_data *sdata;
752 struct ieee80211_if_managed *ifmgd;
753
754 sdata = vif_to_sdata(vif);
755 ifmgd = &sdata->u.mgd;
756
757 trace_api_chswitch_done(sdata, success);
758 if (!success) {
759 /*
760 * If the channel switch was not successful, stay
761 * around on the old channel. We currently lack
762 * good handling of this situation, possibly we
763 * should just drop the association.
764 */
765 sdata->local->csa_channel = sdata->local->oper_channel;
766 }
767
768 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
769}
770EXPORT_SYMBOL(ieee80211_chswitch_done);
771
cc32abd4
JB		 772static void ieee80211_chswitch_timer(unsigned long data)
773{
774 struct ieee80211_sub_if_data *sdata =
775 (struct ieee80211_sub_if_data *) data;
776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
777
5bb644a0
JB		 778 if (sdata->local->quiescing) {
779 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
780 return;
781 }
782
42935eca 783 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 784}
785
786void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
787 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 788 struct ieee80211_bss *bss,
789 u64 timestamp)
cc32abd4 790{
0c1ad2ca
JB		 791 struct cfg80211_bss *cbss =
792 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 793 struct ieee80211_channel *new_ch;
794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 795 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
796 cbss->channel->band);
cc32abd4 797
77fdaa12
JB		 798 ASSERT_MGD_MTX(ifmgd);
799
800 if (!ifmgd->associated)
cc32abd4
JB		 801 return;
802
fbe9c429 803 if (sdata->local->scanning)
cc32abd4
JB		 804 return;
805
806 /* Disregard subsequent beacons if we are already running a timer
807 processing a CSA */
808
809 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
810 return;
811
812 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
813 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
814 return;
815
816 sdata->local->csa_channel = new_ch;
817
5ce6e438
JB		 818 if (sdata->local->ops->channel_switch) {
819 /* use driver's channel switch callback */
820 struct ieee80211_channel_switch ch_switch;
821 memset(&ch_switch, 0, sizeof(ch_switch));
822 ch_switch.timestamp = timestamp;
823 if (sw_elem->mode) {
824 ch_switch.block_tx = true;
825 ieee80211_stop_queues_by_reason(&sdata->local->hw,
826 IEEE80211_QUEUE_STOP_REASON_CSA);
827 }
828 ch_switch.channel = new_ch;
829 ch_switch.count = sw_elem->count;
830 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
831 drv_channel_switch(sdata->local, &ch_switch);
832 return;
833 }
834
835 /* channel switch handled in software */
cc32abd4 836 if (sw_elem->count <= 1) {
42935eca 837 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 838 } else {
9feaddc7
WYG		 839 if (sw_elem->mode)
840 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 841 IEEE80211_QUEUE_STOP_REASON_CSA);
842 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
843 mod_timer(&ifmgd->chswitch_timer,
844 jiffies +
845 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 846 cbss->beacon_interval));
cc32abd4
JB		 847 }
848}
849
850static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
851 u16 capab_info, u8 *pwr_constr_elem,
852 u8 pwr_constr_elem_len)
853{
854 struct ieee80211_conf *conf = &sdata->local->hw.conf;
855
856 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
857 return;
858
859 /* Power constraint IE length should be 1 octet */
860 if (pwr_constr_elem_len != 1)
861 return;
862
a48b13ac 863 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 864 (*pwr_constr_elem != sdata->local->power_constr_level)) {
865 sdata->local->power_constr_level = *pwr_constr_elem;
866 ieee80211_hw_config(sdata->local, 0);
867 }
868}
869
f90754c1
JO		 870void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
871{
872 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
873 struct ieee80211_local *local = sdata->local;
874 struct ieee80211_conf *conf = &local->hw.conf;
875
876 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
877 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
878 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
879
880 local->disable_dynamic_ps = false;
881 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
882}
883EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
884
885void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
886{
887 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
888 struct ieee80211_local *local = sdata->local;
889 struct ieee80211_conf *conf = &local->hw.conf;
890
891 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
892 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
893 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
894
895 local->disable_dynamic_ps = true;
896 conf->dynamic_ps_timeout = 0;
897 del_timer_sync(&local->dynamic_ps_timer);
898 ieee80211_queue_work(&local->hw,
899 &local->dynamic_ps_enable_work);
900}
901EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
902
965bedad
JB		 903/* powersave */
904static void ieee80211_enable_ps(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata)
906{
907 struct ieee80211_conf *conf = &local->hw.conf;
908
d5edaedc
JB		 909 /*
910 * If we are scanning right now then the parameters will
911 * take effect when scan finishes.
912 */
fbe9c429 913 if (local->scanning)
d5edaedc
JB		 914 return;
915
965bedad
JB		 916 if (conf->dynamic_ps_timeout > 0 &&
917 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
918 mod_timer(&local->dynamic_ps_timer, jiffies +
919 msecs_to_jiffies(conf->dynamic_ps_timeout));
920 } else {
921 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
922 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 923
2a13052f
JO		 924 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
925 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
926 return;
927
928 conf->flags |= IEEE80211_CONF_PS;
929 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 930 }
931}
932
933static void ieee80211_change_ps(struct ieee80211_local *local)
934{
935 struct ieee80211_conf *conf = &local->hw.conf;
936
937 if (local->ps_sdata) {
965bedad
JB		 938 ieee80211_enable_ps(local, local->ps_sdata);
939 } else if (conf->flags & IEEE80211_CONF_PS) {
940 conf->flags &= ~IEEE80211_CONF_PS;
941 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
942 del_timer_sync(&local->dynamic_ps_timer);
943 cancel_work_sync(&local->dynamic_ps_enable_work);
944 }
945}
946
808118cb
JY		 947static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
948{
949 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
950 struct sta_info *sta = NULL;
c2c98fde 951 bool authorized = false;
808118cb
JY		 952
953 if (!mgd->powersave)
954 return false;
955
05cb9108
JB		 956 if (mgd->broken_ap)
957 return false;
958
808118cb
JY		 959 if (!mgd->associated)
960 return false;
961
962 if (!mgd->associated->beacon_ies)
963 return false;
964
965 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
966 IEEE80211_STA_CONNECTION_POLL))
967 return false;
968
969 rcu_read_lock();
970 sta = sta_info_get(sdata, mgd->bssid);
971 if (sta)
c2c98fde 972 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 973 rcu_read_unlock();
974
c2c98fde 975 return authorized;
808118cb
JY		 976}
977
965bedad 978/* need to hold RTNL or interface lock */
10f644a4 979void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 980{
981 struct ieee80211_sub_if_data *sdata, *found = NULL;
982 int count = 0;
195e294d 983 int timeout;
965bedad
JB		 984
985 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
986 local->ps_sdata = NULL;
987 return;
988 }
989
af6b6374
JB		 990 if (!list_empty(&local->work_list)) {
991 local->ps_sdata = NULL;
992 goto change;
993 }
994
965bedad 995 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 996 if (!ieee80211_sdata_running(sdata))
965bedad 997 continue;
8c7914de
RM		 998 if (sdata->vif.type == NL80211_IFTYPE_AP) {
999 /* If an AP vif is found, then disable PS
1000 * by setting the count to zero thereby setting
1001 * ps_sdata to NULL.
1002 */
1003 count = 0;
1004 break;
1005 }
965bedad
JB		 1006 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1007 continue;
1008 found = sdata;
1009 count++;
1010 }
1011
808118cb 1012 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1013 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1014 s32 beaconint_us;
1015
1016 if (latency < 0)
ed77134b 1017 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1018
1019 beaconint_us = ieee80211_tu_to_usec(
1020 found->vif.bss_conf.beacon_int);
1021
ff616381 1022 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1023 if (timeout < 0) {
1024 /*
ff616381
JO		 1025 * Go to full PSM if the user configures a very low
1026 * latency requirement.
0ab82b04
EP		 1027 * The 2000 second value is there for compatibility
1028 * until the PM_QOS_NETWORK_LATENCY is configured
1029 * with real values.
195e294d 1030 */
0ab82b04
EP		 1031 if (latency > (1900 * USEC_PER_MSEC) &&
1032 latency != (2000 * USEC_PER_SEC))
195e294d 1033 timeout = 0;
ff616381
JO		 1034 else
1035 timeout = 100;
195e294d 1036 }
f90754c1
JO		 1037 local->dynamic_ps_user_timeout = timeout;
1038 if (!local->disable_dynamic_ps)
1039 conf->dynamic_ps_timeout =
1040 local->dynamic_ps_user_timeout;
195e294d 1041
04fe2037 1042 if (beaconint_us > latency) {
10f644a4 1043 local->ps_sdata = NULL;
04fe2037 1044 } else {
56007a02 1045 struct ieee80211_bss *bss;
04fe2037 1046 int maxslp = 1;
56007a02 1047 u8 dtimper;
04fe2037 1048
56007a02
JB		 1049 bss = (void *)found->u.mgd.associated->priv;
1050 dtimper = bss->dtim_period;
1051
1052 /* If the TIM IE is invalid, pretend the value is 1 */
1053 if (!dtimper)
1054 dtimper = 1;
1055 else if (dtimper > 1)
04fe2037
JB		 1056 maxslp = min_t(int, dtimper,
1057 latency / beaconint_us);
1058
9ccebe61 1059 local->hw.conf.max_sleep_period = maxslp;
56007a02 1060 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1061 local->ps_sdata = found;
04fe2037 1062 }
10f644a4 1063 } else {
965bedad 1064 local->ps_sdata = NULL;
10f644a4 1065 }
965bedad 1066
af6b6374 1067 change:
965bedad
JB		 1068 ieee80211_change_ps(local);
1069}
1070
1071void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1072{
1073 struct ieee80211_local *local =
1074 container_of(work, struct ieee80211_local,
1075 dynamic_ps_disable_work);
1076
1077 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1078 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1079 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1080 }
1081
1082 ieee80211_wake_queues_by_reason(&local->hw,
1083 IEEE80211_QUEUE_STOP_REASON_PS);
1084}
1085
1086void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1087{
1088 struct ieee80211_local *local =
1089 container_of(work, struct ieee80211_local,
1090 dynamic_ps_enable_work);
1091 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1092 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1093 unsigned long flags;
1094 int q;
965bedad
JB		 1095
1096 /* can only happen when PS was just disabled anyway */
1097 if (!sdata)
1098 return;
1099
5e34069c
CL		 1100 ifmgd = &sdata->u.mgd;
1101
965bedad
JB		 1102 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1103 return;
1104
77b7023a
AN		 1105 if (!local->disable_dynamic_ps &&
1106 local->hw.conf.dynamic_ps_timeout > 0) {
1107 /* don't enter PS if TX frames are pending */
1108 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1109 mod_timer(&local->dynamic_ps_timer, jiffies +
1110 msecs_to_jiffies(
1111 local->hw.conf.dynamic_ps_timeout));
1112 return;
1113 }
77b7023a
AN		 1114
1115 /*
1116 * transmission can be stopped by others which leads to
1117 * dynamic_ps_timer expiry. Postpone the ps timer if it
1118 * is not the actual idle state.
1119 */
1120 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1121 for (q = 0; q < local->hw.queues; q++) {
1122 if (local->queue_stop_reasons[q]) {
1123 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1124 flags);
1125 mod_timer(&local->dynamic_ps_timer, jiffies +
1126 msecs_to_jiffies(
1127 local->hw.conf.dynamic_ps_timeout));
1128 return;
1129 }
1130 }
1131 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1132 }
1ddc2867 1133
375177bf 1134 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1135 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1136 netif_tx_stop_all_queues(sdata->dev);
965bedad 1137
e8306f98
VN		 1138 if (drv_tx_frames_pending(local))
1139 mod_timer(&local->dynamic_ps_timer, jiffies +
1140 msecs_to_jiffies(
1141 local->hw.conf.dynamic_ps_timeout));
1142 else {
1143 ieee80211_send_nullfunc(local, sdata, 1);
1144 /* Flush to get the tx status of nullfunc frame */
1145 drv_flush(local, false);
1146 }
f3e85b9e
VN		 1147 }
1148
2a13052f
JO		 1149 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1150 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1151 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1152 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1153 local->hw.conf.flags |= IEEE80211_CONF_PS;
1154 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1155 }
f3e85b9e 1156
77b7023a
AN		 1157 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1158 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1159}
1160
1161void ieee80211_dynamic_ps_timer(unsigned long data)
1162{
1163 struct ieee80211_local *local = (void *) data;
1164
78f1a8b7 1165 if (local->quiescing || local->suspended)
5bb644a0
JB		 1166 return;
1167
42935eca 1168 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1169}
1170
60f8b39c 1171/* MLME */
f698d856 1172static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1173 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1174 u8 *wmm_param, size_t wmm_param_len)
1175{
f0706e82 1176 struct ieee80211_tx_queue_params params;
4ced3f74 1177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1178 size_t left;
1179 int count;
ab13315a 1180 u8 *pos, uapsd_queues = 0;
f0706e82 1181
e1b3ec1a
SG		 1182 if (!local->ops->conf_tx)
1183 return;
1184
af6b6374 1185 if (local->hw.queues < 4)
3434fbd3
JB		 1186 return;
1187
1188 if (!wmm_param)
1189 return;
1190
f0706e82
JB		 1191 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1192 return;
ab13315a
KV		 1193
1194 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1195 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1196
f0706e82 1197 count = wmm_param[6] & 0x0f;
46900298 1198 if (count == ifmgd->wmm_last_param_set)
f0706e82 1199 return;
46900298 1200 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1201
1202 pos = wmm_param + 8;
1203 left = wmm_param_len - 8;
1204
1205 memset(&params, 0, sizeof(params));
1206
f0706e82
JB		 1207 local->wmm_acm = 0;
1208 for (; left >= 4; left -= 4, pos += 4) {
1209 int aci = (pos[0] >> 5) & 0x03;
1210 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1211 bool uapsd = false;
f0706e82
JB		 1212 int queue;
1213
1214 switch (aci) {
0eeb59fe 1215 case 1: /* AC_BK */
e100bb64 1216 queue = 3;
988c0f72 1217 if (acm)
0eeb59fe 1218 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1219 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1220 uapsd = true;
f0706e82 1221 break;
0eeb59fe 1222 case 2: /* AC_VI */
e100bb64 1223 queue = 1;
988c0f72 1224 if (acm)
0eeb59fe 1225 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1226 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1227 uapsd = true;
f0706e82 1228 break;
0eeb59fe 1229 case 3: /* AC_VO */
e100bb64 1230 queue = 0;
988c0f72 1231 if (acm)
0eeb59fe 1232 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1233 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1234 uapsd = true;
f0706e82 1235 break;
0eeb59fe 1236 case 0: /* AC_BE */
f0706e82 1237 default:
e100bb64 1238 queue = 2;
988c0f72 1239 if (acm)
0eeb59fe 1240 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1241 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1242 uapsd = true;
f0706e82
JB		 1243 break;
1244 }
1245
1246 params.aifs = pos[0] & 0x0f;
1247 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1248 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1249 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1250 params.uapsd = uapsd;
1251
f4ea83dd 1252#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1253 wiphy_debug(local->hw.wiphy,
1254 "WMM queue=%d aci=%d acm=%d aifs=%d "
1255 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1256 queue, aci, acm,
1257 params.aifs, params.cw_min, params.cw_max,
1258 params.txop, params.uapsd);
3330d7be 1259#endif
f6f3def3
EP		 1260 sdata->tx_conf[queue] = params;
1261 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1262 wiphy_debug(local->hw.wiphy,
1263 "failed to set TX queue parameters for queue %d\n",
1264 queue);
f0706e82 1265 }
e1b3ec1a
SG		 1266
1267 /* enable WMM or activate new settings */
4ced3f74 1268 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1269}
1270
7a5158ef
JB		 1271static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1272 u16 capab, bool erp_valid, u8 erp)
5628221c 1273{
bda3933a 1274 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1275 u32 changed = 0;
7a5158ef
JB		 1276 bool use_protection;
1277 bool use_short_preamble;
1278 bool use_short_slot;
1279
1280 if (erp_valid) {
1281 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1282 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1283 } else {
1284 use_protection = false;
1285 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1286 }
1287
1288 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1289 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1290 use_short_slot = true;
5628221c 1291
471b3efd 1292 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1293 bss_conf->use_cts_prot = use_protection;
1294 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1295 }
7e9ed188 1296
d43c7b37 1297 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1298 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1299 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1300 }
d9430a32 1301
7a5158ef 1302 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1303 bss_conf->use_short_slot = use_short_slot;
1304 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1305 }
1306
1307 return changed;
1308}
1309
f698d856 1310static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1311 struct cfg80211_bss *cbss,
ae5eb026 1312 u32 bss_info_changed)
f0706e82 1313{
0c1ad2ca 1314 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1315 struct ieee80211_local *local = sdata->local;
68542962 1316 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1317
ae5eb026 1318 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1319 /* set timing information */
68542962 1320 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1321 bss_conf->last_tsf = cbss->tsf;
5628221c 1322
77fdaa12
JB		 1323 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1324 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1325 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1326
7ccc8bd7
FF		 1327 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1328 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1329
0c1ad2ca
JB		 1330 sdata->u.mgd.associated = cbss;
1331 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1332
17e4ec14
JM		 1333 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1334
b291ba11
JB		 1335 /* just to be sure */
1336 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1337 IEEE80211_STA_BEACON_POLL);
1338
9ac19a90 1339 ieee80211_led_assoc(local, 1);
9306102e 1340
e5b900d2
JB		 1341 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1342 bss_conf->dtim_period = bss->dtim_period;
1343 else
1344 bss_conf->dtim_period = 0;
1345
68542962 1346 bss_conf->assoc = 1;
9cef8737 1347
a97c13c3 1348 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1349 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1350 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1351 bss_info_changed |= BSS_CHANGED_CQM;
1352
68542962
JO		 1353 /* Enable ARP filtering */
1354 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1355 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1356 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1357 }
1358
ae5eb026 1359 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1360
056508dc
JB		 1361 mutex_lock(&local->iflist_mtx);
1362 ieee80211_recalc_ps(local, -1);
025e6be2 1363 ieee80211_recalc_smps(local);
056508dc 1364 mutex_unlock(&local->iflist_mtx);
e0cb686f 1365
8a5b33f5 1366 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1367 netif_carrier_on(sdata->dev);
f0706e82
JB		 1368}
1369
e69e95db 1370static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1371 u16 stype, u16 reason, bool tx,
1372 u8 *frame_buf)
aa458d17 1373{
46900298 1374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1375 struct ieee80211_local *local = sdata->local;
1376 struct sta_info *sta;
3cc5240b 1377 u32 changed = 0;
b291ba11 1378 u8 bssid[ETH_ALEN];
aa458d17 1379
77fdaa12
JB		 1380 ASSERT_MGD_MTX(ifmgd);
1381
37ad3888
JB		 1382 if (WARN_ON_ONCE(tx && !frame_buf))
1383 return;
1384
b291ba11
JB		 1385 if (WARN_ON(!ifmgd->associated))
1386 return;
1387
0c1ad2ca 1388 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1389
77fdaa12
JB		 1390 ifmgd->associated = NULL;
1391 memset(ifmgd->bssid, 0, ETH_ALEN);
1392
1393 /*
1394 * we need to commit the associated = NULL change because the
1395 * scan code uses that to determine whether this iface should
1396 * go to/wake up from powersave or not -- and could otherwise
1397 * wake the queues erroneously.
1398 */
1399 smp_mb();
1400
1401 /*
1402 * Thus, we can only afterwards stop the queues -- to account
1403 * for the case where another CPU is finishing a scan at this
1404 * time -- we don't want the scan code to enable queues.
1405 */
aa458d17 1406
8a5b33f5 1407 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1408 netif_carrier_off(sdata->dev);
1409
2a419056 1410 mutex_lock(&local->sta_mtx);
abe60632 1411 sta = sta_info_get(sdata, bssid);
4cad6c7c 1412 if (sta) {
c2c98fde 1413 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1414 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1415 }
2a419056 1416 mutex_unlock(&local->sta_mtx);
aa458d17 1417
37ad3888
JB		 1418 /* deauthenticate/disassociate now */
1419 if (tx || frame_buf)
1420 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1421 tx, frame_buf);
1422
1423 /* flush out frame */
1424 if (tx)
1425 drv_flush(local, false);
1426
1427 /* remove AP and TDLS peers */
1428 sta_info_flush(local, sdata);
1429
1430 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1431 changed |= ieee80211_reset_erp_info(sdata);
1432
f5e5bf25 1433 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1434 changed |= BSS_CHANGED_ASSOC;
1435 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1436
413ad50a
JB		 1437 /* on the next assoc, re-program HT parameters */
1438 sdata->ht_opmode_valid = false;
ef96a842
BG		 1439 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1440 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1441
a8302de9
VT		 1442 local->power_constr_level = 0;
1443
520eb820
KV		 1444 del_timer_sync(&local->dynamic_ps_timer);
1445 cancel_work_sync(&local->dynamic_ps_enable_work);
1446
e0cb686f
KV		 1447 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1448 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1449 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1450 }
a331400b 1451 local->ps_sdata = NULL;
ae5eb026 1452
68542962
JO		 1453 /* Disable ARP filtering */
1454 if (sdata->vif.bss_conf.arp_filter_enabled) {
1455 sdata->vif.bss_conf.arp_filter_enabled = false;
1456 changed |= BSS_CHANGED_ARP_FILTER;
1457 }
1458
3abead59
JB		 1459 sdata->vif.bss_conf.qos = false;
1460 changed |= BSS_CHANGED_QOS;
1461
0aaffa9b
JB		 1462 /* The BSSID (not really interesting) and HT changed */
1463 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1464 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1465
3cc5240b
JB		 1466 /* channel(_type) changes are handled by ieee80211_hw_config */
1467 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1468 ieee80211_hw_config(local, 0);
1469
3abead59
JB		 1470 /* disassociated - set to defaults now */
1471 ieee80211_set_wmm_default(sdata, false);
1472
b9dcf712
JB		 1473 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1474 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1475 del_timer_sync(&sdata->u.mgd.timer);
1476 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1477}
f0706e82 1478
3cf335d5
KV		 1479void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1480 struct ieee80211_hdr *hdr)
1481{
1482 /*
1483 * We can postpone the mgd.timer whenever receiving unicast frames
1484 * from AP because we know that the connection is working both ways
1485 * at that time. But multicast frames (and hence also beacons) must
1486 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1487 * data idle periods for sending the periodic probe request to the
1488 * AP we're connected to.
3cf335d5 1489 */
b291ba11
JB		 1490 if (is_multicast_ether_addr(hdr->addr1))
1491 return;
1492
be099e82 1493 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1494}
f0706e82 1495
4e5ff376
FF		 1496static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1497{
1498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1499
1500 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1501 IEEE80211_STA_CONNECTION_POLL)))
1502 return;
1503
1504 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1505 IEEE80211_STA_BEACON_POLL);
1506 mutex_lock(&sdata->local->iflist_mtx);
1507 ieee80211_recalc_ps(sdata->local, -1);
1508 mutex_unlock(&sdata->local->iflist_mtx);
1509
1510 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1511 return;
1512
1513 /*
1514 * We've received a probe response, but are not sure whether
1515 * we have or will be receiving any beacons or data, so let's
1516 * schedule the timers again, just in case.
1517 */
1518 ieee80211_sta_reset_beacon_monitor(sdata);
1519
1520 mod_timer(&ifmgd->conn_mon_timer,
1521 round_jiffies_up(jiffies +
1522 IEEE80211_CONNECTION_IDLE_TIME));
1523}
1524
1525void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1526 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1527{
75706d0e 1528 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1529 return;
1530
04ac3c0e
FF		 1531 if (ack)
1532 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1533
1534 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1535 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1536 if (ack)
1537 sdata->u.mgd.probe_send_count = 0;
1538 else
1539 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1540 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1541 }
1542}
1543
a43abf29
ML		 1544static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1545{
1546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1547 const u8 *ssid;
f01a067d 1548 u8 *dst = ifmgd->associated->bssid;
180205bd 1549 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1550
1551 /*
1552 * Try sending broadcast probe requests for the last three
1553 * probe requests after the first ones failed since some
1554 * buggy APs only support broadcast probe requests.
1555 */
1556 if (ifmgd->probe_send_count >= unicast_limit)
1557 dst = NULL;
a43abf29 1558
4e5ff376
FF		 1559 /*
1560 * When the hardware reports an accurate Tx ACK status, it's
1561 * better to send a nullfunc frame instead of a probe request,
1562 * as it will kick us off the AP quickly if we aren't associated
1563 * anymore. The timeout will be reset if the frame is ACKed by
1564 * the AP.
1565 */
04ac3c0e
FF		 1566 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1567 ifmgd->nullfunc_failed = false;
4e5ff376 1568 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1569 } else {
4e5ff376 1570 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1571 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1572 (u32) -1, true, false);
4e5ff376 1573 }
a43abf29
ML		 1574
1575 ifmgd->probe_send_count++;
180205bd 1576 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1577 run_again(ifmgd, ifmgd->probe_timeout);
1578}
1579
b291ba11
JB		 1580static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1581 bool beacon)
04de8381 1582{
04de8381 1583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1584 bool already = false;
34bfc411 1585
9607e6b6 1586 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1587 return;
1588
91a3bd76
LR		 1589 if (sdata->local->scanning)
1590 return;
1591
b8bc4b0a
JB		 1592 if (sdata->local->tmp_channel)
1593 return;
1594
77fdaa12
JB		 1595 mutex_lock(&ifmgd->mtx);
1596
1597 if (!ifmgd->associated)
1598 goto out;
1599
a860402d 1600#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1601 if (beacon && net_ratelimit())
1602 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1603 "- sending probe request\n", sdata->name);
a860402d 1604#endif
04de8381 1605
b291ba11
JB		 1606 /*
1607 * The driver/our work has already reported this event or the
1608 * connection monitoring has kicked in and we have already sent
1609 * a probe request. Or maybe the AP died and the driver keeps
1610 * reporting until we disassociate...
1611 *
1612 * In either case we have to ignore the current call to this
1613 * function (except for setting the correct probe reason bit)
1614 * because otherwise we would reset the timer every time and
1615 * never check whether we received a probe response!
1616 */
1617 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1618 IEEE80211_STA_CONNECTION_POLL))
1619 already = true;
1620
1621 if (beacon)
1622 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1623 else
1624 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1625
1626 if (already)
1627 goto out;
1628
4e751843
JB		 1629 mutex_lock(&sdata->local->iflist_mtx);
1630 ieee80211_recalc_ps(sdata->local, -1);
1631 mutex_unlock(&sdata->local->iflist_mtx);
1632
a43abf29
ML		 1633 ifmgd->probe_send_count = 0;
1634 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1635 out:
1636 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1637}
1638
a619a4c0
JO		 1639struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1640 struct ieee80211_vif *vif)
1641{
1642 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct sk_buff *skb;
1645 const u8 *ssid;
1646
1647 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1648 return NULL;
1649
1650 ASSERT_MGD_MTX(ifmgd);
1651
1652 if (!ifmgd->associated)
1653 return NULL;
1654
1655 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1656 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1657 (u32) -1, ssid + 2, ssid[1],
1658 NULL, 0, true);
a619a4c0
JO		 1659
1660 return skb;
1661}
1662EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1663
1e4dcd01
JO		 1664static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1665{
1666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1667 struct ieee80211_local *local = sdata->local;
1668 u8 bssid[ETH_ALEN];
5fef7dbc 1669 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1670
1671 mutex_lock(&ifmgd->mtx);
1672 if (!ifmgd->associated) {
1673 mutex_unlock(&ifmgd->mtx);
1674 return;
1675 }
1676
1677 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1678
180205bd
BG		 1679 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1680 sdata->name, bssid);
1e4dcd01 1681
37ad3888
JB		 1682 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1683 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1684 false, frame_buf);
1e4dcd01 1685 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1686
1e4dcd01
JO		 1687 /*
1688 * must be outside lock due to cfg80211,
1689 * but that's not a problem.
1690 */
5fef7dbc 1691 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1692
1693 mutex_lock(&local->mtx);
1694 ieee80211_recalc_idle(local);
1695 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1696}
1697
1698void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1699{
1700 struct ieee80211_sub_if_data *sdata =
1701 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1702 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1704 struct sta_info *sta;
1705
1706 if (ifmgd->associated) {
30fa9047 1707 rcu_read_lock();
a85e1d55
PS		 1708 sta = sta_info_get(sdata, ifmgd->bssid);
1709 if (sta)
1710 sta->beacon_loss_count++;
30fa9047 1711 rcu_read_unlock();
a85e1d55 1712 }
b291ba11 1713
1e4dcd01
JO		 1714 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1715 __ieee80211_connection_loss(sdata);
1716 else
1717 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1718}
1719
04de8381
KV		 1720void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1721{
1722 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1723 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1724
b5878a2d
JB		 1725 trace_api_beacon_loss(sdata);
1726
1e4dcd01
JO		 1727 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1728 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1729}
1730EXPORT_SYMBOL(ieee80211_beacon_loss);
1731
1e4dcd01
JO		 1732void ieee80211_connection_loss(struct ieee80211_vif *vif)
1733{
1734 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1735 struct ieee80211_hw *hw = &sdata->local->hw;
1736
b5878a2d
JB		 1737 trace_api_connection_loss(sdata);
1738
1e4dcd01
JO		 1739 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1740 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1741}
1742EXPORT_SYMBOL(ieee80211_connection_loss);
1743
1744
66e67e41
JB		 1745static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1746 bool assoc)
1747{
1748 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1749
1750 lockdep_assert_held(&sdata->u.mgd.mtx);
1751
66e67e41
JB		 1752 if (!assoc) {
1753 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1754
1755 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1756 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1757 }
1758
1759 cfg80211_put_bss(auth_data->bss);
1760 kfree(auth_data);
1761 sdata->u.mgd.auth_data = NULL;
1762}
1763
1764static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1765 struct ieee80211_mgmt *mgmt, size_t len)
1766{
1767 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1768 u8 *pos;
1769 struct ieee802_11_elems elems;
1770
1771 pos = mgmt->u.auth.variable;
1772 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1773 if (!elems.challenge)
1774 return;
1775 auth_data->expected_transaction = 4;
1776 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1777 elems.challenge - 2, elems.challenge_len + 2,
1778 auth_data->bss->bssid, auth_data->bss->bssid,
1779 auth_data->key, auth_data->key_len,
1780 auth_data->key_idx);
1781}
1782
1783static enum rx_mgmt_action __must_check
1784ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1785 struct ieee80211_mgmt *mgmt, size_t len)
1786{
1787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1788 u8 bssid[ETH_ALEN];
1789 u16 auth_alg, auth_transaction, status_code;
1790 struct sta_info *sta;
1791
1792 lockdep_assert_held(&ifmgd->mtx);
1793
1794 if (len < 24 + 6)
1795 return RX_MGMT_NONE;
1796
1797 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1798 return RX_MGMT_NONE;
1799
1800 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1801
888d04df 1802 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1803 return RX_MGMT_NONE;
1804
1805 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1806 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1807 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1808
1809 if (auth_alg != ifmgd->auth_data->algorithm ||
1810 auth_transaction != ifmgd->auth_data->expected_transaction)
1811 return RX_MGMT_NONE;
1812
1813 if (status_code != WLAN_STATUS_SUCCESS) {
1814 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1815 sdata->name, mgmt->sa, status_code);
1816 goto out;
1817 }
1818
1819 switch (ifmgd->auth_data->algorithm) {
1820 case WLAN_AUTH_OPEN:
1821 case WLAN_AUTH_LEAP:
1822 case WLAN_AUTH_FT:
1823 break;
1824 case WLAN_AUTH_SHARED_KEY:
1825 if (ifmgd->auth_data->expected_transaction != 4) {
1826 ieee80211_auth_challenge(sdata, mgmt, len);
1827 /* need another frame */
1828 return RX_MGMT_NONE;
1829 }
1830 break;
1831 default:
1832 WARN_ONCE(1, "invalid auth alg %d",
1833 ifmgd->auth_data->algorithm);
1834 return RX_MGMT_NONE;
1835 }
1836
1837 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1838 out:
66e67e41
JB		 1839 ifmgd->auth_data->done = true;
1840 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1841 run_again(ifmgd, ifmgd->auth_data->timeout);
1842
1843 /* move station state to auth */
1844 mutex_lock(&sdata->local->sta_mtx);
1845 sta = sta_info_get(sdata, bssid);
1846 if (!sta) {
1847 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1848 goto out_err;
1849 }
1850 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1851 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1852 sdata->name, bssid);
1853 goto out_err;
1854 }
1855 mutex_unlock(&sdata->local->sta_mtx);
1856
1857 return RX_MGMT_CFG80211_RX_AUTH;
1858 out_err:
1859 mutex_unlock(&sdata->local->sta_mtx);
1860 /* ignore frame -- wait for timeout */
1861 return RX_MGMT_NONE;
1862}
1863
1864
77fdaa12
JB		 1865static enum rx_mgmt_action __must_check
1866ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1867 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1868{
46900298 1869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1870 const u8 *bssid = NULL;
f0706e82
JB		 1871 u16 reason_code;
1872
66e67e41
JB		 1873 lockdep_assert_held(&ifmgd->mtx);
1874
f4ea83dd 1875 if (len < 24 + 2)
77fdaa12 1876 return RX_MGMT_NONE;
f0706e82 1877
66e67e41 1878 if (!ifmgd->associated ||
888d04df 1879 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1880 return RX_MGMT_NONE;
77fdaa12 1881
0c1ad2ca 1882 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1883
1884 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1885
77fdaa12 1886 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1887 sdata->name, bssid, reason_code);
77fdaa12 1888
37ad3888
JB		 1889 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1890
7da7cc1d 1891 mutex_lock(&sdata->local->mtx);
63f170e0 1892 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1893 mutex_unlock(&sdata->local->mtx);
f0706e82 1894
77fdaa12 1895 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1896}
1897
1898
77fdaa12
JB		 1899static enum rx_mgmt_action __must_check
1900ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1901 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1902{
46900298 1903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1904 u16 reason_code;
1905
66e67e41 1906 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1907
66e67e41 1908 if (len < 24 + 2)
77fdaa12
JB		 1909 return RX_MGMT_NONE;
1910
66e67e41 1911 if (!ifmgd->associated ||
888d04df 1912 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1913 return RX_MGMT_NONE;
f0706e82
JB		 1914
1915 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1916
0ff71613 1917 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1918 sdata->name, mgmt->sa, reason_code);
f0706e82 1919
37ad3888
JB		 1920 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1921
7da7cc1d 1922 mutex_lock(&sdata->local->mtx);
bc83b681 1923 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1924 mutex_unlock(&sdata->local->mtx);
37ad3888 1925
77fdaa12 1926 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1927}
1928
c74d084f
CL		 1929static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1930 u8 *supp_rates, unsigned int supp_rates_len,
1931 u32 *rates, u32 *basic_rates,
1932 bool *have_higher_than_11mbit,
1933 int *min_rate, int *min_rate_index)
1934{
1935 int i, j;
1936
1937 for (i = 0; i < supp_rates_len; i++) {
1938 int rate = (supp_rates[i] & 0x7f) * 5;
1939 bool is_basic = !!(supp_rates[i] & 0x80);
1940
1941 if (rate > 110)
1942 *have_higher_than_11mbit = true;
1943
1944 /*
1945 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1946 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1947 *
1948 * Note: Even through the membership selector and the basic
1949 * rate flag share the same bit, they are not exactly
1950 * the same.
1951 */
1952 if (!!(supp_rates[i] & 0x80) &&
1953 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1954 continue;
1955
1956 for (j = 0; j < sband->n_bitrates; j++) {
1957 if (sband->bitrates[j].bitrate == rate) {
1958 *rates |= BIT(j);
1959 if (is_basic)
1960 *basic_rates |= BIT(j);
1961 if (rate < *min_rate) {
1962 *min_rate = rate;
1963 *min_rate_index = j;
1964 }
1965 break;
1966 }
1967 }
1968 }
1969}
f0706e82 1970
66e67e41
JB		 1971static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1972 bool assoc)
1973{
1974 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1975
1976 lockdep_assert_held(&sdata->u.mgd.mtx);
1977
66e67e41
JB		 1978 if (!assoc) {
1979 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1980
1981 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1982 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1983 }
1984
1985 kfree(assoc_data);
1986 sdata->u.mgd.assoc_data = NULL;
1987}
1988
1989static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1990 struct cfg80211_bss *cbss,
af6b6374 1991 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1992{
46900298 1993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1994 struct ieee80211_local *local = sdata->local;
8318d78a 1995 struct ieee80211_supported_band *sband;
f0706e82 1996 struct sta_info *sta;
af6b6374 1997 u8 *pos;
af6b6374 1998 u16 capab_info, aid;
f0706e82 1999 struct ieee802_11_elems elems;
bda3933a 2000 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2001 u32 changed = 0;
c74d084f 2002 int err;
ae5eb026 2003 u16 ap_ht_cap_flags;
f0706e82 2004
af6b6374 2005 /* AssocResp and ReassocResp have identical structure */
f0706e82 2006
f0706e82 2007 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2008 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2009
1dd84aa2 2010 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2011 printk(KERN_DEBUG
2012 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2013 sdata->name, aid);
1dd84aa2
JB		 2014 aid &= ~(BIT(15) | BIT(14));
2015
05cb9108
JB		 2016 ifmgd->broken_ap = false;
2017
2018 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2019 printk(KERN_DEBUG
2020 "%s: invalid AID value %d (out of range), turn off PS\n",
2021 sdata->name, aid);
2022 aid = 0;
2023 ifmgd->broken_ap = true;
2024 }
2025
af6b6374
JB		 2026 pos = mgmt->u.assoc_resp.variable;
2027 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2028
f0706e82
JB		 2029 if (!elems.supp_rates) {
2030 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2031 sdata->name);
af6b6374 2032 return false;
f0706e82
JB		 2033 }
2034
46900298 2035 ifmgd->aid = aid;
f0706e82 2036
2a33bee2
GE		 2037 mutex_lock(&sdata->local->sta_mtx);
2038 /*
2039 * station info was already allocated and inserted before
2040 * the association and should be available to us
2041 */
7852e361 2042 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2043 if (WARN_ON(!sta)) {
2044 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2045 return false;
77fdaa12 2046 }
05e5e883 2047
66e67e41 2048 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2049
ab1faead 2050 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2051 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2052 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2053
2054 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2055
4b7679a5 2056 rate_control_rate_init(sta);
f0706e82 2057
46900298 2058 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2059 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2060
ddf4ac53 2061 if (elems.wmm_param)
c2c98fde 2062 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2063
c8987876
JB		 2064 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2065 if (!err)
2066 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2067 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2068 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2069 if (err) {
2070 printk(KERN_DEBUG
2071 "%s: failed to move station %pM to desired state\n",
2072 sdata->name, sta->sta.addr);
2073 WARN_ON(__sta_info_destroy(sta));
2074 mutex_unlock(&sdata->local->sta_mtx);
2075 return false;
2076 }
2077
7852e361 2078 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2079
f2176d72
JO		 2080 /*
2081 * Always handle WMM once after association regardless
2082 * of the first value the AP uses. Setting -1 here has
2083 * that effect because the AP values is an unsigned
2084 * 4-bit value.
2085 */
2086 ifmgd->wmm_last_param_set = -1;
2087
ddf4ac53 2088 if (elems.wmm_param)
4ced3f74 2089 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2090 elems.wmm_param_len);
aa837e1d 2091 else
3abead59
JB		 2092 ieee80211_set_wmm_default(sdata, false);
2093 changed |= BSS_CHANGED_QOS;
f0706e82 2094
ae5eb026 2095 if (elems.ht_info_elem && elems.wmm_param &&
ab1faead 2096 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2097 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2098 cbss->bssid, ap_ht_cap_flags,
2099 false);
ae5eb026 2100
60f8b39c
JB		 2101 /* set AID and assoc capability,
2102 * ieee80211_set_associated() will tell the driver */
2103 bss_conf->aid = aid;
2104 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2105 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2106
d524215f
FF		 2107 /*
2108 * If we're using 4-addr mode, let the AP know that we're
2109 * doing so, so that it can create the STA VLAN on its side
2110 */
2111 if (ifmgd->use_4addr)
2112 ieee80211_send_4addr_nullfunc(local, sdata);
2113
15b7b062 2114 /*
b291ba11
JB		 2115 * Start timer to probe the connection to the AP now.
2116 * Also start the timer that will detect beacon loss.
15b7b062 2117 */
b291ba11 2118 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2119 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2120
af6b6374 2121 return true;
f0706e82
JB		 2122}
2123
66e67e41
JB		 2124static enum rx_mgmt_action __must_check
2125ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2126 struct ieee80211_mgmt *mgmt, size_t len,
2127 struct cfg80211_bss **bss)
2128{
2129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2130 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2131 u16 capab_info, status_code, aid;
2132 struct ieee802_11_elems elems;
2133 u8 *pos;
2134 bool reassoc;
2135
2136 lockdep_assert_held(&ifmgd->mtx);
2137
2138 if (!assoc_data)
2139 return RX_MGMT_NONE;
888d04df 2140 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2141 return RX_MGMT_NONE;
2142
2143 /*
2144 * AssocResp and ReassocResp have identical structure, so process both
2145 * of them in this function.
2146 */
2147
2148 if (len < 24 + 6)
2149 return RX_MGMT_NONE;
2150
2151 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2152 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2153 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2154 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2155
2156 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2157 "status=%d aid=%d)\n",
2158 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2159 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2160
2161 pos = mgmt->u.assoc_resp.variable;
2162 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2163
2164 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2165 elems.timeout_int && elems.timeout_int_len == 5 &&
2166 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2167 u32 tu, ms;
2168 tu = get_unaligned_le32(elems.timeout_int + 1);
2169 ms = tu * 1024 / 1000;
2170 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2171 "comeback duration %u TU (%u ms)\n",
2172 sdata->name, mgmt->sa, tu, ms);
2173 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2174 if (ms > IEEE80211_ASSOC_TIMEOUT)
2175 run_again(ifmgd, assoc_data->timeout);
2176 return RX_MGMT_NONE;
2177 }
2178
2179 *bss = assoc_data->bss;
2180
2181 if (status_code != WLAN_STATUS_SUCCESS) {
2182 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2183 sdata->name, mgmt->sa, status_code);
2184 ieee80211_destroy_assoc_data(sdata, false);
2185 } else {
2186 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2187
66e67e41
JB		 2188 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2189 /* oops -- internal error -- send timeout for now */
79ebfb85 2190 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2191 sta_info_destroy_addr(sdata, mgmt->bssid);
2192 cfg80211_put_bss(*bss);
2193 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2194 }
79ebfb85
JB		 2195
2196 /*
2197 * destroy assoc_data afterwards, as otherwise an idle
2198 * recalc after assoc_data is NULL but before associated
2199 * is set can cause the interface to go idle
2200 */
2201 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2202 }
2203
2204 return RX_MGMT_CFG80211_RX_ASSOC;
2205}
98c8fccf
JB		 2206static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2207 struct ieee80211_mgmt *mgmt,
2208 size_t len,
2209 struct ieee80211_rx_status *rx_status,
2210 struct ieee802_11_elems *elems,
2211 bool beacon)
2212{
2213 struct ieee80211_local *local = sdata->local;
2214 int freq;
c2b13452 2215 struct ieee80211_bss *bss;
98c8fccf 2216 struct ieee80211_channel *channel;
56007a02
JB		 2217 bool need_ps = false;
2218
66e67e41 2219 if (sdata->u.mgd.associated &&
888d04df
FF		 2220 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2221 == 0) {
56007a02
JB		 2222 bss = (void *)sdata->u.mgd.associated->priv;
2223 /* not previously set so we may need to recalc */
2224 need_ps = !bss->dtim_period;
2225 }
98c8fccf
JB		 2226
2227 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2228 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2229 rx_status->band);
98c8fccf
JB		 2230 else
2231 freq = rx_status->freq;
2232
2233 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2234
2235 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2236 return;
2237
98c8fccf 2238 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2239 channel, beacon);
77fdaa12
JB		 2240 if (bss)
2241 ieee80211_rx_bss_put(local, bss);
2242
2243 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2244 return;
2245
56007a02
JB		 2246 if (need_ps) {
2247 mutex_lock(&local->iflist_mtx);
2248 ieee80211_recalc_ps(local, -1);
2249 mutex_unlock(&local->iflist_mtx);
2250 }
2251
c481ec97 2252 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2253 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2254 ETH_ALEN) == 0)) {
c481ec97
S		 2255 struct ieee80211_channel_sw_ie *sw_elem =
2256 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2257 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2258 bss, rx_status->mactime);
c481ec97 2259 }
f0706e82
JB		 2260}
2261
2262
f698d856 2263static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2264 struct sk_buff *skb)
f0706e82 2265{
af6b6374 2266 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2267 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2268 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2269 size_t baselen, len = skb->len;
ae6a44e3
EK		 2270 struct ieee802_11_elems elems;
2271
15b7b062
KV		 2272 ifmgd = &sdata->u.mgd;
2273
77fdaa12
JB		 2274 ASSERT_MGD_MTX(ifmgd);
2275
888d04df 2276 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2277 return; /* ignore ProbeResp to foreign address */
2278
ae6a44e3
EK		 2279 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2280 if (baselen > len)
2281 return;
2282
2283 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2284 &elems);
2285
98c8fccf 2286 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2287
77fdaa12 2288 if (ifmgd->associated &&
888d04df 2289 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2290 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2291
2292 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2293 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2294 == 0) {
66e67e41
JB		 2295 /* got probe response, continue with auth */
2296 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2297 ifmgd->auth_data->tries = 0;
2298 ifmgd->auth_data->timeout = jiffies;
2299 run_again(ifmgd, ifmgd->auth_data->timeout);
2300 }
f0706e82
JB		 2301}
2302
d91f36db
JB		 2303/*
2304 * This is the canonical list of information elements we care about,
2305 * the filter code also gives us all changes to the Microsoft OUI
2306 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2307 *
2308 * We implement beacon filtering in software since that means we can
2309 * avoid processing the frame here and in cfg80211, and userspace
2310 * will not be able to tell whether the hardware supports it or not.
2311 *
2312 * XXX: This list needs to be dynamic -- userspace needs to be able to
2313 * add items it requires. It also needs to be able to tell us to
2314 * look out for other vendor IEs.
2315 */
2316static const u64 care_about_ies =
1d4df3a5
JB		 2317 (1ULL << WLAN_EID_COUNTRY) |
2318 (1ULL << WLAN_EID_ERP_INFO) |
2319 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2320 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2321 (1ULL << WLAN_EID_HT_CAPABILITY) |
2322 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2323
f698d856 2324static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2325 struct ieee80211_mgmt *mgmt,
2326 size_t len,
2327 struct ieee80211_rx_status *rx_status)
2328{
d91f36db 2329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2330 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2331 size_t baselen;
2332 struct ieee802_11_elems elems;
f698d856 2333 struct ieee80211_local *local = sdata->local;
471b3efd 2334 u32 changed = 0;
d91f36db 2335 bool erp_valid, directed_tim = false;
7a5158ef 2336 u8 erp_value = 0;
d91f36db 2337 u32 ncrc;
77fdaa12
JB		 2338 u8 *bssid;
2339
66e67e41 2340 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2341
ae6a44e3
EK		 2342 /* Process beacon from the current BSS */
2343 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2344 if (baselen > len)
2345 return;
2346
d91f36db 2347 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2348 return;
f0706e82 2349
66e67e41 2350 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2351 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2352 == 0) {
66e67e41
JB		 2353 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2354 len - baselen, &elems);
77fdaa12 2355
66e67e41
JB		 2356 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2357 false);
2358 ifmgd->assoc_data->have_beacon = true;
2359 ifmgd->assoc_data->sent_assoc = false;
2360 /* continue assoc process */
2361 ifmgd->assoc_data->timeout = jiffies;
2362 run_again(ifmgd, ifmgd->assoc_data->timeout);
2363 return;
2364 }
77fdaa12 2365
66e67e41 2366 if (!ifmgd->associated ||
888d04df 2367 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2368 return;
66e67e41 2369 bssid = ifmgd->associated->bssid;
f0706e82 2370
17e4ec14
JM		 2371 /* Track average RSSI from the Beacon frames of the current AP */
2372 ifmgd->last_beacon_signal = rx_status->signal;
2373 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2374 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2375 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2376 ifmgd->last_cqm_event_signal = 0;
391a200a 2377 ifmgd->count_beacon_signal = 1;
615f7b9b 2378 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2379 } else {
2380 ifmgd->ave_beacon_signal =
2381 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2382 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2383 ifmgd->ave_beacon_signal) / 16;
391a200a 2384 ifmgd->count_beacon_signal++;
17e4ec14 2385 }
615f7b9b
MV		 2386
2387 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2388 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2389 int sig = ifmgd->ave_beacon_signal;
2390 int last_sig = ifmgd->last_ave_beacon_signal;
2391
2392 /*
2393 * if signal crosses either of the boundaries, invoke callback
2394 * with appropriate parameters
2395 */
2396 if (sig > ifmgd->rssi_max_thold &&
2397 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2398 ifmgd->last_ave_beacon_signal = sig;
2399 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2400 } else if (sig < ifmgd->rssi_min_thold &&
2401 (last_sig >= ifmgd->rssi_max_thold ||
2402 last_sig == 0)) {
2403 ifmgd->last_ave_beacon_signal = sig;
2404 drv_rssi_callback(local, RSSI_EVENT_LOW);
2405 }
2406 }
2407
17e4ec14 2408 if (bss_conf->cqm_rssi_thold &&
391a200a 2409 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2410 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2411 int sig = ifmgd->ave_beacon_signal / 16;
2412 int last_event = ifmgd->last_cqm_event_signal;
2413 int thold = bss_conf->cqm_rssi_thold;
2414 int hyst = bss_conf->cqm_rssi_hyst;
2415 if (sig < thold &&
2416 (last_event == 0 || sig < last_event - hyst)) {
2417 ifmgd->last_cqm_event_signal = sig;
2418 ieee80211_cqm_rssi_notify(
2419 &sdata->vif,
2420 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2421 GFP_KERNEL);
2422 } else if (sig > thold &&
2423 (last_event == 0 || sig > last_event + hyst)) {
2424 ifmgd->last_cqm_event_signal = sig;
2425 ieee80211_cqm_rssi_notify(
2426 &sdata->vif,
2427 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2428 GFP_KERNEL);
2429 }
2430 }
2431
b291ba11 2432 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2433#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2434 if (net_ratelimit()) {
2435 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2436 "to a received beacon\n", sdata->name);
92778180
JM		 2437 }
2438#endif
b291ba11 2439 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2440 mutex_lock(&local->iflist_mtx);
2441 ieee80211_recalc_ps(local, -1);
2442 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2443 }
2444
b291ba11
JB		 2445 /*
2446 * Push the beacon loss detection into the future since
2447 * we are processing a beacon from the AP just now.
2448 */
d3a910a8 2449 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2450
d91f36db
JB		 2451 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2452 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2453 len - baselen, &elems,
2454 care_about_ies, ncrc);
2455
2456 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2457 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2458 ifmgd->aid);
d91f36db 2459
d8ec4433 2460 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2461 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2462 true);
d91f36db 2463
4ced3f74 2464 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2465 elems.wmm_param_len);
2466 }
fe3fa827 2467
25c9c875 2468 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2469 if (directed_tim) {
572e0012
KV		 2470 if (local->hw.conf.dynamic_ps_timeout > 0) {
2471 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2472 ieee80211_hw_config(local,
2473 IEEE80211_CONF_CHANGE_PS);
2474 ieee80211_send_nullfunc(local, sdata, 0);
2475 } else {
2476 local->pspolling = true;
2477
2478 /*
2479 * Here is assumed that the driver will be
2480 * able to send ps-poll frame and receive a
2481 * response even though power save mode is
2482 * enabled, but some drivers might require
2483 * to disable power save here. This needs
2484 * to be investigated.
2485 */
2486 ieee80211_send_pspoll(local, sdata);
2487 }
a97b77b9
VN		 2488 }
2489 }
7a5158ef 2490
d8ec4433 2491 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2492 return;
2493 ifmgd->beacon_crc = ncrc;
d8ec4433 2494 ifmgd->beacon_crc_valid = true;
30196673 2495
7a5158ef
JB		 2496 if (elems.erp_info && elems.erp_info_len >= 1) {
2497 erp_valid = true;
2498 erp_value = elems.erp_info[0];
2499 } else {
2500 erp_valid = false;
50c4afb9 2501 }
7a5158ef
JB		 2502 changed |= ieee80211_handle_bss_capability(sdata,
2503 le16_to_cpu(mgmt->u.beacon.capab_info),
2504 erp_valid, erp_value);
f0706e82 2505
d3c990fb 2506
53d6f81c 2507 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2508 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2509 struct sta_info *sta;
2510 struct ieee80211_supported_band *sband;
2511 u16 ap_ht_cap_flags;
2512
2513 rcu_read_lock();
2514
abe60632 2515 sta = sta_info_get(sdata, bssid);
77fdaa12 2516 if (WARN_ON(!sta)) {
ae5eb026
JB		 2517 rcu_read_unlock();
2518 return;
2519 }
2520
2521 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2522
ef96a842 2523 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2524 elems.ht_cap_elem, &sta->sta.ht_cap);
2525
2526 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2527
2528 rcu_read_unlock();
2529
2530 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2531 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2532 }
2533
8b19e6ca 2534 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2535 if (elems.country_elem) {
a8302de9
VT		 2536 /* TODO: IBSS also needs this */
2537 if (elems.pwr_constr_elem)
2538 ieee80211_handle_pwr_constr(sdata,
2539 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2540 elems.pwr_constr_elem,
2541 elems.pwr_constr_elem_len);
3f2355cb
LR		 2542 }
2543
471b3efd 2544 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2545}
2546
1fa57d01
JB		 2547void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2548 struct sk_buff *skb)
f0706e82 2549{
77fdaa12 2550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2551 struct ieee80211_rx_status *rx_status;
f0706e82 2552 struct ieee80211_mgmt *mgmt;
66e67e41 2553 struct cfg80211_bss *bss = NULL;
77fdaa12 2554 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2555 u16 fc;
2556
f0706e82
JB		 2557 rx_status = (struct ieee80211_rx_status *) skb->cb;
2558 mgmt = (struct ieee80211_mgmt *) skb->data;
2559 fc = le16_to_cpu(mgmt->frame_control);
2560
77fdaa12
JB		 2561 mutex_lock(&ifmgd->mtx);
2562
66e67e41
JB		 2563 switch (fc & IEEE80211_FCTL_STYPE) {
2564 case IEEE80211_STYPE_BEACON:
2565 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2566 break;
2567 case IEEE80211_STYPE_PROBE_RESP:
2568 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2569 break;
2570 case IEEE80211_STYPE_AUTH:
2571 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2572 break;
2573 case IEEE80211_STYPE_DEAUTH:
2574 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2575 break;
2576 case IEEE80211_STYPE_DISASSOC:
2577 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2578 break;
2579 case IEEE80211_STYPE_ASSOC_RESP:
2580 case IEEE80211_STYPE_REASSOC_RESP:
2581 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2582 break;
2583 case IEEE80211_STYPE_ACTION:
2584 switch (mgmt->u.action.category) {
2585 case WLAN_CATEGORY_SPECTRUM_MGMT:
2586 ieee80211_sta_process_chanswitch(sdata,
2587 &mgmt->u.action.u.chan_switch.sw_elem,
2588 (void *)ifmgd->associated->priv,
2589 rx_status->mactime);
77fdaa12 2590 break;
77fdaa12 2591 }
77fdaa12 2592 }
77fdaa12
JB		 2593 mutex_unlock(&ifmgd->mtx);
2594
66e67e41
JB		 2595 switch (rma) {
2596 case RX_MGMT_NONE:
2597 /* no action */
2598 break;
2599 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2600 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2601 break;
2602 case RX_MGMT_CFG80211_DISASSOC:
2603 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2604 break;
2605 case RX_MGMT_CFG80211_RX_AUTH:
2606 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2607 break;
2608 case RX_MGMT_CFG80211_RX_ASSOC:
2609 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2610 break;
2611 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2612 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2613 break;
2614 default:
2615 WARN(1, "unexpected: %d", rma);
b054b747 2616 }
f0706e82
JB		 2617}
2618
9c6bd790 2619static void ieee80211_sta_timer(unsigned long data)
f0706e82 2620{
60f8b39c
JB		 2621 struct ieee80211_sub_if_data *sdata =
2622 (struct ieee80211_sub_if_data *) data;
46900298 2623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2624 struct ieee80211_local *local = sdata->local;
f0706e82 2625
5bb644a0
JB		 2626 if (local->quiescing) {
2627 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2628 return;
2629 }
2630
64592c8f 2631 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2632}
2633
04ac3c0e 2634static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2635 u8 *bssid, u8 reason)
04ac3c0e
FF		 2636{
2637 struct ieee80211_local *local = sdata->local;
2638 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2639 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2640
2641 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2642 IEEE80211_STA_BEACON_POLL);
2643
37ad3888
JB		 2644 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2645 false, frame_buf);
04ac3c0e 2646 mutex_unlock(&ifmgd->mtx);
37ad3888 2647
04ac3c0e
FF		 2648 /*
2649 * must be outside lock due to cfg80211,
2650 * but that's not a problem.
2651 */
5fef7dbc 2652 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2653
2654 mutex_lock(&local->mtx);
2655 ieee80211_recalc_idle(local);
2656 mutex_unlock(&local->mtx);
2657
04ac3c0e
FF		 2658 mutex_lock(&ifmgd->mtx);
2659}
2660
66e67e41
JB		 2661static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2662{
2663 struct ieee80211_local *local = sdata->local;
2664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2665 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2666
2667 lockdep_assert_held(&ifmgd->mtx);
2668
2669 if (WARN_ON_ONCE(!auth_data))
2670 return -EINVAL;
2671
66e67e41
JB		 2672 auth_data->tries++;
2673
2674 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2675 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2676 sdata->name, auth_data->bss->bssid);
2677
2678 /*
2679 * Most likely AP is not in the range so remove the
2680 * bss struct for that AP.
2681 */
2682 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2683
2684 return -ETIMEDOUT;
2685 }
2686
2687 if (auth_data->bss->proberesp_ies) {
2688 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2689 sdata->name, auth_data->bss->bssid, auth_data->tries,
2690 IEEE80211_AUTH_MAX_TRIES);
2691
2692 auth_data->expected_transaction = 2;
2693 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2694 auth_data->ie, auth_data->ie_len,
2695 auth_data->bss->bssid,
2696 auth_data->bss->bssid, NULL, 0, 0);
2697 } else {
2698 const u8 *ssidie;
2699
2700 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2701 sdata->name, auth_data->bss->bssid, auth_data->tries,
2702 IEEE80211_AUTH_MAX_TRIES);
2703
2704 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2705 if (!ssidie)
2706 return -EINVAL;
2707 /*
2708 * Direct probe is sent to broadcast address as some APs
2709 * will not answer to direct packet in unassociated state.
2710 */
2711 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2712 NULL, 0, (u32) -1, true, false);
2713 }
2714
2715 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2716 run_again(ifmgd, auth_data->timeout);
2717
2718 return 0;
2719}
2720
2721static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2722{
2723 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2724 struct ieee80211_local *local = sdata->local;
2725
2726 lockdep_assert_held(&sdata->u.mgd.mtx);
2727
66e67e41
JB		 2728 assoc_data->tries++;
2729 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2730 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2731 sdata->name, assoc_data->bss->bssid);
2732
2733 /*
2734 * Most likely AP is not in the range so remove the
2735 * bss struct for that AP.
2736 */
2737 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2738
2739 return -ETIMEDOUT;
2740 }
2741
2742 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2743 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2744 IEEE80211_ASSOC_MAX_TRIES);
2745 ieee80211_send_assoc(sdata);
2746
2747 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2748 run_again(&sdata->u.mgd, assoc_data->timeout);
2749
2750 return 0;
2751}
2752
1fa57d01 2753void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2754{
9c6bd790 2755 struct ieee80211_local *local = sdata->local;
1fa57d01 2756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2757
77fdaa12
JB		 2758 mutex_lock(&ifmgd->mtx);
2759
66e67e41
JB		 2760 if (ifmgd->auth_data &&
2761 time_after(jiffies, ifmgd->auth_data->timeout)) {
2762 if (ifmgd->auth_data->done) {
2763 /*
2764 * ok ... we waited for assoc but userspace didn't,
2765 * so let's just kill the auth data
2766 */
2767 ieee80211_destroy_auth_data(sdata, false);
2768 } else if (ieee80211_probe_auth(sdata)) {
2769 u8 bssid[ETH_ALEN];
2770
2771 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2772
2773 ieee80211_destroy_auth_data(sdata, false);
2774
2775 mutex_unlock(&ifmgd->mtx);
2776 cfg80211_send_auth_timeout(sdata->dev, bssid);
2777 mutex_lock(&ifmgd->mtx);
2778 }
2779 } else if (ifmgd->auth_data)
2780 run_again(ifmgd, ifmgd->auth_data->timeout);
2781
2782 if (ifmgd->assoc_data &&
2783 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2784 if (!ifmgd->assoc_data->have_beacon ||
2785 ieee80211_do_assoc(sdata)) {
2786 u8 bssid[ETH_ALEN];
2787
2788 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2789
2790 ieee80211_destroy_assoc_data(sdata, false);
2791
2792 mutex_unlock(&ifmgd->mtx);
2793 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2794 mutex_lock(&ifmgd->mtx);
2795 }
2796 } else if (ifmgd->assoc_data)
2797 run_again(ifmgd, ifmgd->assoc_data->timeout);
2798
b291ba11
JB		 2799 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2800 IEEE80211_STA_CONNECTION_POLL) &&
2801 ifmgd->associated) {
a43abf29 2802 u8 bssid[ETH_ALEN];
72a8a3ed 2803 int max_tries;
a43abf29 2804
0c1ad2ca 2805 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2806
72a8a3ed 2807 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2808 max_tries = max_nullfunc_tries;
72a8a3ed 2809 else
180205bd 2810 max_tries = max_probe_tries;
72a8a3ed 2811
4e5ff376
FF		 2812 /* ACK received for nullfunc probing frame */
2813 if (!ifmgd->probe_send_count)
2814 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2815 else if (ifmgd->nullfunc_failed) {
2816 if (ifmgd->probe_send_count < max_tries) {
2817#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2818 wiphy_debug(local->hw.wiphy,
2819 "%s: No ack for nullfunc frame to"
bfc31df3 2820 " AP %pM, try %d/%i\n",
04ac3c0e 2821 sdata->name, bssid,
bfc31df3 2822 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2823#endif
2824 ieee80211_mgd_probe_ap_send(sdata);
2825 } else {
2826#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2827 wiphy_debug(local->hw.wiphy,
2828 "%s: No ack for nullfunc frame to"
2829 " AP %pM, disconnecting.\n",
c658e5db 2830 sdata->name, bssid);
04ac3c0e 2831#endif
95acac61
JB		 2832 ieee80211_sta_connection_lost(sdata, bssid,
2833 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2834 }
2835 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2836 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2837 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2838#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2839 wiphy_debug(local->hw.wiphy,
2840 "%s: Failed to send nullfunc to AP %pM"
2841 " after %dms, disconnecting.\n",
2842 sdata->name,
180205bd 2843 bssid, probe_wait_ms);
04ac3c0e 2844#endif
95acac61
JB		 2845 ieee80211_sta_connection_lost(sdata, bssid,
2846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2847 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2848#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2849 wiphy_debug(local->hw.wiphy,
2850 "%s: No probe response from AP %pM"
bfc31df3 2851 " after %dms, try %d/%i\n",
b38afa87 2852 sdata->name,
180205bd 2853 bssid, probe_wait_ms,
bfc31df3 2854 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2855#endif
2856 ieee80211_mgd_probe_ap_send(sdata);
2857 } else {
b291ba11
JB		 2858 /*
2859 * We actually lost the connection ... or did we?
2860 * Let's make sure!
2861 */
b38afa87
BG		 2862 wiphy_debug(local->hw.wiphy,
2863 "%s: No probe response from AP %pM"
2864 " after %dms, disconnecting.\n",
2865 sdata->name,
180205bd 2866 bssid, probe_wait_ms);
04ac3c0e 2867
95acac61
JB		 2868 ieee80211_sta_connection_lost(sdata, bssid,
2869 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2870 }
2871 }
2872
77fdaa12 2873 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2874
2875 mutex_lock(&local->mtx);
2876 ieee80211_recalc_idle(local);
2877 mutex_unlock(&local->mtx);
f0706e82
JB		 2878}
2879
b291ba11
JB		 2880static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2881{
2882 struct ieee80211_sub_if_data *sdata =
2883 (struct ieee80211_sub_if_data *) data;
2884 struct ieee80211_local *local = sdata->local;
2885
2886 if (local->quiescing)
2887 return;
2888
1e4dcd01
JO		 2889 ieee80211_queue_work(&sdata->local->hw,
2890 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2891}
2892
2893static void ieee80211_sta_conn_mon_timer(unsigned long data)
2894{
2895 struct ieee80211_sub_if_data *sdata =
2896 (struct ieee80211_sub_if_data *) data;
2897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2898 struct ieee80211_local *local = sdata->local;
2899
2900 if (local->quiescing)
2901 return;
2902
42935eca 2903 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2904}
2905
2906static void ieee80211_sta_monitor_work(struct work_struct *work)
2907{
2908 struct ieee80211_sub_if_data *sdata =
2909 container_of(work, struct ieee80211_sub_if_data,
2910 u.mgd.monitor_work);
2911
2912 ieee80211_mgd_probe_ap(sdata, false);
2913}
2914
9c6bd790
JB		 2915static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2916{
494f1fe5
EP		 2917 u32 flags;
2918
ad935687 2919 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2920 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2921 IEEE80211_STA_CONNECTION_POLL);
ad935687 2922
b291ba11 2923 /* let's probe the connection once */
494f1fe5
EP		 2924 flags = sdata->local->hw.flags;
2925 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2926 ieee80211_queue_work(&sdata->local->hw,
2927 &sdata->u.mgd.monitor_work);
b291ba11 2928 /* and do all the other regular work too */
64592c8f 2929 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2930 }
9c6bd790 2931}
f0706e82 2932
5bb644a0
JB		 2933#ifdef CONFIG_PM
2934void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2935{
2936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2937
2938 /*
2939 * we need to use atomic bitops for the running bits
2940 * only because both timers might fire at the same
2941 * time -- the code here is properly synchronised.
2942 */
2943
d1f5b7a3
JB		 2944 cancel_work_sync(&ifmgd->request_smps_work);
2945
0ecfe806 2946 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2947 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2948 if (del_timer_sync(&ifmgd->timer))
2949 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2950
2951 cancel_work_sync(&ifmgd->chswitch_work);
2952 if (del_timer_sync(&ifmgd->chswitch_timer))
2953 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2954
b291ba11
JB		 2955 /* these will just be re-established on connection */
2956 del_timer_sync(&ifmgd->conn_mon_timer);
2957 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2958}
2959
2960void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2961{
2962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2963
676b58c2
RM		 2964 if (!ifmgd->associated)
2965 return;
2966
95acac61
JB		 2967 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2968 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2969 mutex_lock(&ifmgd->mtx);
2970 if (ifmgd->associated) {
2971#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2972 wiphy_debug(sdata->local->hw.wiphy,
2973 "%s: driver requested disconnect after resume.\n",
2974 sdata->name);
2975#endif
2976 ieee80211_sta_connection_lost(sdata,
2977 ifmgd->associated->bssid,
2978 WLAN_REASON_UNSPECIFIED);
2979 mutex_unlock(&ifmgd->mtx);
2980 return;
2981 }
2982 mutex_unlock(&ifmgd->mtx);
2983 }
2984
5bb644a0
JB		 2985 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2986 add_timer(&ifmgd->timer);
2987 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2988 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2989 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2990 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2991}
2992#endif
2993
9c6bd790
JB		 2994/* interface setup */
2995void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2996{
46900298 2997 struct ieee80211_if_managed *ifmgd;
988c0f72 2998
46900298 2999 ifmgd = &sdata->u.mgd;
b291ba11 3000 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3001 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3002 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3003 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3004 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3005 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3006 (unsigned long) sdata);
b291ba11
JB		 3007 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3008 (unsigned long) sdata);
3009 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3010 (unsigned long) sdata);
46900298 3011 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3012 (unsigned long) sdata);
9c6bd790 3013
ab1faead 3014 ifmgd->flags = 0;
1478acb3 3015 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3016 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3017 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3018
77fdaa12 3019 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3020
3021 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3022 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3023 else
3024 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3025}
3026
77fdaa12
JB		 3027/* scan finished notification */
3028void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3029{
77fdaa12 3030 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3031
77fdaa12
JB		 3032 /* Restart STA timers */
3033 rcu_read_lock();
3034 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3035 ieee80211_restart_sta_timer(sdata);
3036 rcu_read_unlock();
3037}
60f8b39c 3038
77fdaa12
JB		 3039int ieee80211_max_network_latency(struct notifier_block *nb,
3040 unsigned long data, void *dummy)
3041{
3042 s32 latency_usec = (s32) data;
3043 struct ieee80211_local *local =
3044 container_of(nb, struct ieee80211_local,
3045 network_latency_notifier);
1fa6f4af 3046
77fdaa12
JB		 3047 mutex_lock(&local->iflist_mtx);
3048 ieee80211_recalc_ps(local, latency_usec);
3049 mutex_unlock(&local->iflist_mtx);
dfe67012 3050
77fdaa12 3051 return 0;
9c6bd790
JB		 3052}
3053
a1cf775d 3054static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3055 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3056{
3057 struct ieee80211_local *local = sdata->local;
3058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3059 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3060 struct sta_info *sta;
3061 bool have_sta = false;
3062 int err;
3063
3064 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3065 return -EINVAL;
3066
3067 if (assoc) {
3068 rcu_read_lock();
5d6a1b06 3069 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3070 rcu_read_unlock();
3071 }
3072
3073 if (!have_sta) {
5d6a1b06 3074 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3075 if (!sta)
3076 return -ENOMEM;
3077 }
3078
3079 mutex_lock(&local->mtx);
3080 ieee80211_recalc_idle(sdata->local);
3081 mutex_unlock(&local->mtx);
3082
3083 /* switch to the right channel */
5d6a1b06 3084 local->oper_channel = cbss->channel;
a1cf775d
JB		 3085 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3086
3087 if (!have_sta) {
5d6a1b06
JB		 3088 struct ieee80211_supported_band *sband;
3089 u32 rates = 0, basic_rates = 0;
3090 bool have_higher_than_11mbit;
3091 int min_rate = INT_MAX, min_rate_index = -1;
3092
3093 sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
3094
3095 ieee80211_get_rates(sband, bss->supp_rates,
3096 bss->supp_rates_len,
3097 &rates, &basic_rates,
3098 &have_higher_than_11mbit,
3099 &min_rate, &min_rate_index);
3100
3101 /*
3102 * This used to be a workaround for basic rates missing
3103 * in the association response frame. Now that we no
3104 * longer use the basic rates from there, it probably
3105 * doesn't happen any more, but keep the workaround so
3106 * in case some *other* APs are buggy in different ways
3107 * we can connect -- with a warning.
3108 */
3109 if (!basic_rates && min_rate_index >= 0) {
3110 printk(KERN_DEBUG
3111 "%s: No basic rates, using min rate instead.\n",
3112 sdata->name);
3113 basic_rates = BIT(min_rate_index);
3114 }
3115
3116 sta->sta.supp_rates[cbss->channel->band] = rates;
3117 sdata->vif.bss_conf.basic_rates = basic_rates;
3118
3119 /* cf. IEEE 802.11 9.2.12 */
3120 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3121 have_higher_than_11mbit)
3122 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3123 else
3124 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3125
3126 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3127
3128 /* tell driver about BSSID and basic rates */
3129 ieee80211_bss_info_change_notify(sdata,
3130 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3131
3132 if (assoc)
3133 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3134
3135 err = sta_info_insert(sta);
3136 sta = NULL;
3137 if (err) {
3138 printk(KERN_DEBUG
3139 "%s: failed to insert STA entry for the AP (error %d)\n",
3140 sdata->name, err);
3141 return err;
3142 }
3143 } else
5d6a1b06 3144 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3145
3146 return 0;
3147}
3148
77fdaa12
JB		 3149/* config hooks */
3150int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3151 struct cfg80211_auth_request *req)
9c6bd790 3152{
66e67e41
JB		 3153 struct ieee80211_local *local = sdata->local;
3154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3155 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3156 u16 auth_alg;
66e67e41
JB		 3157 int err;
3158
3159 /* prepare auth data structure */
9c6bd790 3160
77fdaa12
JB		 3161 switch (req->auth_type) {
3162 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3163 auth_alg = WLAN_AUTH_OPEN;
3164 break;
3165 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3166 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3167 return -EOPNOTSUPP;
77fdaa12
JB		 3168 auth_alg = WLAN_AUTH_SHARED_KEY;
3169 break;
3170 case NL80211_AUTHTYPE_FT:
3171 auth_alg = WLAN_AUTH_FT;
3172 break;
3173 case NL80211_AUTHTYPE_NETWORK_EAP:
3174 auth_alg = WLAN_AUTH_LEAP;
3175 break;
3176 default:
3177 return -EOPNOTSUPP;
60f8b39c 3178 }
77fdaa12 3179
66e67e41
JB		 3180 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3181 if (!auth_data)
9c6bd790 3182 return -ENOMEM;
77fdaa12 3183
66e67e41 3184 auth_data->bss = req->bss;
77fdaa12
JB		 3185
3186 if (req->ie && req->ie_len) {
66e67e41
JB		 3187 memcpy(auth_data->ie, req->ie, req->ie_len);
3188 auth_data->ie_len = req->ie_len;
9c6bd790 3189 }
77fdaa12 3190
fffd0934 3191 if (req->key && req->key_len) {
66e67e41
JB		 3192 auth_data->key_len = req->key_len;
3193 auth_data->key_idx = req->key_idx;
3194 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3195 }
3196
66e67e41 3197 auth_data->algorithm = auth_alg;
60f8b39c 3198
66e67e41 3199 /* try to authenticate/probe */
2a33bee2 3200
66e67e41 3201 mutex_lock(&ifmgd->mtx);
2a33bee2 3202
66e67e41
JB		 3203 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3204 ifmgd->assoc_data) {
3205 err = -EBUSY;
3206 goto err_free;
2a33bee2
GE		 3207 }
3208
66e67e41
JB		 3209 if (ifmgd->auth_data)
3210 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3211
66e67e41
JB		 3212 /* prep auth_data so we don't go into idle on disassoc */
3213 ifmgd->auth_data = auth_data;
af6b6374 3214
66e67e41 3215 if (ifmgd->associated)
37ad3888 3216 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3217
66e67e41
JB		 3218 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3219 sdata->name, req->bss->bssid);
e5b900d2 3220
a1cf775d
JB		 3221 err = ieee80211_prep_connection(sdata, req->bss, false);
3222 if (err)
66e67e41 3223 goto err_clear;
af6b6374 3224
66e67e41
JB		 3225 err = ieee80211_probe_auth(sdata);
3226 if (err) {
66e67e41
JB		 3227 sta_info_destroy_addr(sdata, req->bss->bssid);
3228 goto err_clear;
3229 }
3230
3231 /* hold our own reference */
3232 cfg80211_ref_bss(auth_data->bss);
3233 err = 0;
3234 goto out_unlock;
3235
3236 err_clear:
3237 ifmgd->auth_data = NULL;
3238 err_free:
3239 kfree(auth_data);
3240 out_unlock:
3241 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3242
66e67e41 3243 return err;
af6b6374
JB		 3244}
3245
77fdaa12
JB		 3246int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3247 struct cfg80211_assoc_request *req)
f0706e82 3248{
66e67e41 3249 struct ieee80211_local *local = sdata->local;
77fdaa12 3250 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3251 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3252 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3253 struct ieee80211_supported_band *sband;
66e67e41 3254 const u8 *ssidie;
2a33bee2 3255 int i, err;
f0706e82 3256
66e67e41
JB		 3257 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3258 if (!ssidie)
3259 return -EINVAL;
3260
3261 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3262 if (!assoc_data)
3263 return -ENOMEM;
3264
77fdaa12 3265 mutex_lock(&ifmgd->mtx);
9c87ba67 3266
66e67e41 3267 if (ifmgd->associated)
37ad3888 3268 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3269
3270 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3271 err = -EBUSY;
3272 goto err_free;
af6b6374 3273 }
77fdaa12 3274
66e67e41
JB		 3275 if (ifmgd->assoc_data) {
3276 err = -EBUSY;
3277 goto err_free;
3278 }
77fdaa12 3279
66e67e41
JB		 3280 if (ifmgd->auth_data) {
3281 bool match;
3282
3283 /* keep sta info, bssid if matching */
888d04df 3284 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3285 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3286 }
3287
66e67e41
JB		 3288 /* prepare assoc data */
3289
77fdaa12 3290 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3291 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3292
d8ec4433
JO		 3293 ifmgd->beacon_crc_valid = false;
3294
de5036aa
JB		 3295 /*
3296 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3297 * We still associate in non-HT mode (11a/b/g) if any one of these
3298 * ciphers is configured as pairwise.
3299 * We can set this to true for non-11n hardware, that'll be checked
3300 * separately along with the peer capabilities.
3301 */
77fdaa12
JB		 3302 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3303 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3304 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3305 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3306 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3307
ef96a842
BG		 3308 if (req->flags & ASSOC_REQ_DISABLE_HT)
3309 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3310
4e74bfdb
JB		 3311 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3312 sband = local->hw.wiphy->bands[req->bss->channel->band];
3313 if (!sband->ht_cap.ht_supported ||
3314 local->hw.queues < 4 || !bss->wmm_used)
3315 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3316
ef96a842
BG		 3317 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3318 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3319 sizeof(ifmgd->ht_capa_mask));
3320
77fdaa12 3321 if (req->ie && req->ie_len) {
66e67e41
JB		 3322 memcpy(assoc_data->ie, req->ie, req->ie_len);
3323 assoc_data->ie_len = req->ie_len;
3324 }
f679f65d 3325
66e67e41 3326 assoc_data->bss = req->bss;
f679f65d 3327
af6b6374
JB		 3328 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3329 if (ifmgd->powersave)
3330 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3331 else
3332 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3333 } else
3334 ifmgd->ap_smps = ifmgd->req_smps;
3335
66e67e41 3336 assoc_data->capability = req->bss->capability;
76f0303d 3337 assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
66e67e41
JB		 3338 assoc_data->supp_rates = bss->supp_rates;
3339 assoc_data->supp_rates_len = bss->supp_rates_len;
3340 assoc_data->ht_information_ie =
f679f65d 3341 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3342
ab13315a
KV		 3343 if (bss->wmm_used && bss->uapsd_supported &&
3344 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3345 assoc_data->uapsd = true;
ab13315a
KV		 3346 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3347 } else {
76f0303d 3348 assoc_data->uapsd = false;
ab13315a
KV		 3349 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3350 }
3351
66e67e41
JB		 3352 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3353 assoc_data->ssid_len = ssidie[1];
63f170e0 3354
77fdaa12 3355 if (req->prev_bssid)
66e67e41 3356 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3357
3358 if (req->use_mfp) {
3359 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3360 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3361 } else {
3362 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3363 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3364 }
3365
3366 if (req->crypto.control_port)
3367 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3368 else
3369 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3370
a621fa4d
JB		 3371 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3372 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3373
66e67e41
JB		 3374 /* kick off associate process */
3375
3376 ifmgd->assoc_data = assoc_data;
3377
a1cf775d
JB		 3378 err = ieee80211_prep_connection(sdata, req->bss, true);
3379 if (err)
3380 goto err_clear;
66e67e41
JB		 3381
3382 if (!bss->dtim_period &&
3383 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3384 /*
3385 * Wait up to one beacon interval ...
3386 * should this be more if we miss one?
3387 */
3388 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3389 sdata->name, ifmgd->bssid);
3390 assoc_data->timeout = jiffies +
3391 TU_TO_EXP_TIME(req->bss->beacon_interval);
3392 } else {
3393 assoc_data->have_beacon = true;
3394 assoc_data->sent_assoc = false;
3395 assoc_data->timeout = jiffies;
3396 }
3397 run_again(ifmgd, assoc_data->timeout);
3398
fcff4f10
PS		 3399 if (bss->corrupt_data) {
3400 char *corrupt_type = "data";
3401 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3402 if (bss->corrupt_data &
3403 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3404 corrupt_type = "beacon and probe response";
3405 else
3406 corrupt_type = "beacon";
3407 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3408 corrupt_type = "probe response";
3409 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3410 sdata->name, corrupt_type);
3411 }
3412
66e67e41
JB		 3413 err = 0;
3414 goto out;
3415 err_clear:
3416 ifmgd->assoc_data = NULL;
3417 err_free:
3418 kfree(assoc_data);
3419 out:
3420 mutex_unlock(&ifmgd->mtx);
3421
3422 return err;
f0706e82
JB		 3423}
3424
77fdaa12 3425int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3426 struct cfg80211_deauth_request *req)
f0706e82 3427{
46900298 3428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3429 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3430
77fdaa12
JB		 3431 mutex_lock(&ifmgd->mtx);
3432
37ad3888 3433 if (ifmgd->auth_data) {
66e67e41 3434 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3435 mutex_unlock(&ifmgd->mtx);
66e67e41 3436 return 0;
af6b6374 3437 }
77fdaa12 3438
37ad3888
JB		 3439 printk(KERN_DEBUG
3440 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3441 sdata->name, req->bssid, req->reason_code);
0ff71613 3442
37ad3888 3443 if (ifmgd->associated &&
888d04df 3444 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3445 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3446 req->reason_code, true, frame_buf);
37ad3888
JB		 3447 else
3448 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3449 IEEE80211_STYPE_DEAUTH,
3450 req->reason_code, true,
3451 frame_buf);
3452 mutex_unlock(&ifmgd->mtx);
3453
5fef7dbc 3454 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3455
7da7cc1d 3456 mutex_lock(&sdata->local->mtx);
bc83b681 3457 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3458 mutex_unlock(&sdata->local->mtx);
bc83b681 3459
f0706e82
JB		 3460 return 0;
3461}
84363e6e 3462
77fdaa12 3463int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3464 struct cfg80211_disassoc_request *req)
9c6bd790 3465{
77fdaa12 3466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3467 u8 bssid[ETH_ALEN];
5fef7dbc 3468 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3469
77fdaa12 3470 mutex_lock(&ifmgd->mtx);
10f644a4 3471
8d8b261a
JB		 3472 /*
3473 * cfg80211 should catch this ... but it's racy since
3474 * we can receive a disassoc frame, process it, hand it
3475 * to cfg80211 while that's in a locked section already
3476 * trying to tell us that the user wants to disconnect.
3477 */
0c1ad2ca 3478 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3479 mutex_unlock(&ifmgd->mtx);
3480 return -ENOLINK;
3481 }
3482
0ff71613 3483 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3484 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3485
e69e95db 3486 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3487 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3488 req->reason_code, !req->local_state_change,
3489 frame_buf);
77fdaa12 3490 mutex_unlock(&ifmgd->mtx);
10f644a4 3491
5fef7dbc 3492 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3493
7da7cc1d 3494 mutex_lock(&sdata->local->mtx);
bc83b681 3495 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3496 mutex_unlock(&sdata->local->mtx);
bc83b681 3497
10f644a4
JB		 3498 return 0;
3499}
026331c4 3500
54e4ffb2
JB		 3501void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3502{
3503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3504
3505 mutex_lock(&ifmgd->mtx);
3506 if (ifmgd->assoc_data)
3507 ieee80211_destroy_assoc_data(sdata, false);
3508 if (ifmgd->auth_data)
3509 ieee80211_destroy_auth_data(sdata, false);
3510 del_timer_sync(&ifmgd->timer);
3511 mutex_unlock(&ifmgd->mtx);
3512}
3513
a97c13c3
JO		 3514void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3515 enum nl80211_cqm_rssi_threshold_event rssi_event,
3516 gfp_t gfp)
3517{
3518 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3519
b5878a2d
JB		 3520 trace_api_cqm_rssi_notify(sdata, rssi_event);
3521
a97c13c3
JO		 3522 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3523}
3524EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3525
3526unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3527{
3528 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3529 return sdata->dev->operstate;
3530}
3531EXPORT_SYMBOL(ieee80211_get_operstate);
Linux 6.x block layer and io_uring tree(s)