2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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>
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.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
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
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
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.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
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.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
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
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
98 /* no action required */
101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH
,
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC
,
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH
,
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC
,
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
118 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
120 lockdep_assert_held(&ifmgd
->mtx
);
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
133 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
135 ASSERT_MGD_MTX(ifmgd
);
137 if (!timer_pending(&ifmgd
->timer
) ||
138 time_before(timeout
, ifmgd
->timer
.expires
))
139 mod_timer(&ifmgd
->timer
, timeout
);
142 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
144 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
147 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
150 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
151 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
154 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
158 if (unlikely(!sdata
->u
.mgd
.associated
))
161 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
164 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
165 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
167 ifmgd
->probe_send_count
= 0;
170 static int ecw2cw(int ecw
)
172 return (1 << ecw
) - 1;
175 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
176 struct ieee80211_ht_operation
*ht_oper
,
177 const u8
*bssid
, bool reconfig
)
179 struct ieee80211_local
*local
= sdata
->local
;
180 struct ieee80211_supported_band
*sband
;
181 struct sta_info
*sta
;
184 bool disable_40
= false;
186 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
188 switch (sdata
->vif
.bss_conf
.channel_type
) {
189 case NL80211_CHAN_HT40PLUS
:
190 if (local
->oper_channel
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
193 case NL80211_CHAN_HT40MINUS
:
194 if (local
->oper_channel
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
201 /* This can change during the lifetime of the BSS */
202 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
205 mutex_lock(&local
->sta_mtx
);
206 sta
= sta_info_get(sdata
, bssid
);
210 if (sta
&& !sta
->supports_40mhz
)
213 if (sta
&& (!reconfig
||
214 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
215 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
218 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
220 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
222 rate_control_rate_update(local
, sband
, sta
,
223 IEEE80211_RC_BW_CHANGED
);
225 mutex_unlock(&local
->sta_mtx
);
227 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
229 /* if bss configuration changed store the new one */
230 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
231 changed
|= BSS_CHANGED_HT
;
232 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
238 /* frame sending functions */
240 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
241 struct ieee80211_supported_band
*sband
,
247 for (i
= 0; i
< supp_rates_len
; i
++) {
248 int rate
= (supp_rates
[i
] & 0x7F) * 5;
250 for (j
= 0; j
< sband
->n_bitrates
; j
++)
251 if (sband
->bitrates
[j
].bitrate
== rate
) {
261 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
262 struct sk_buff
*skb
, u8 ap_ht_param
,
263 struct ieee80211_supported_band
*sband
,
264 struct ieee80211_channel
*channel
,
265 enum ieee80211_smps_mode smps
)
268 u32 flags
= channel
->flags
;
270 struct ieee80211_sta_ht_cap ht_cap
;
272 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
274 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
275 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
277 /* determine capability flags */
280 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
281 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
282 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
283 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
284 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
287 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
288 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
289 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
290 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
296 * If 40 MHz was disabled associate as though we weren't
297 * capable of 40 MHz -- some broken APs will never fall
298 * back to trying to transmit in 20 MHz.
300 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
301 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
302 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
305 /* set SM PS mode properly */
306 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
308 case IEEE80211_SMPS_AUTOMATIC
:
309 case IEEE80211_SMPS_NUM_MODES
:
311 case IEEE80211_SMPS_OFF
:
312 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
313 IEEE80211_HT_CAP_SM_PS_SHIFT
;
315 case IEEE80211_SMPS_STATIC
:
316 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
317 IEEE80211_HT_CAP_SM_PS_SHIFT
;
319 case IEEE80211_SMPS_DYNAMIC
:
320 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
321 IEEE80211_HT_CAP_SM_PS_SHIFT
;
325 /* reserve and fill IE */
326 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
327 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
330 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
332 struct ieee80211_supported_band
*sband
)
336 struct ieee80211_sta_vht_cap vht_cap
;
338 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
340 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
342 /* determine capability flags */
345 /* reserve and fill IE */
346 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_capabilities
) + 2);
347 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
350 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
352 struct ieee80211_local
*local
= sdata
->local
;
353 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
354 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
356 struct ieee80211_mgmt
*mgmt
;
358 size_t offset
= 0, noffset
;
359 int i
, count
, rates_len
, supp_rates_len
;
361 struct ieee80211_supported_band
*sband
;
364 lockdep_assert_held(&ifmgd
->mtx
);
366 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
368 if (assoc_data
->supp_rates_len
) {
370 * Get all rates supported by the device and the AP as
371 * some APs don't like getting a superset of their rates
372 * in the association request (e.g. D-Link DAP 1353 in
375 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
376 assoc_data
->supp_rates_len
,
380 * In case AP not provide any supported rates information
381 * before association, we send information element(s) with
382 * all rates that we support.
385 rates_len
= sband
->n_bitrates
;
388 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
389 sizeof(*mgmt
) + /* bit too much but doesn't matter */
390 2 + assoc_data
->ssid_len
+ /* SSID */
391 4 + rates_len
+ /* (extended) rates */
392 4 + /* power capability */
393 2 + 2 * sband
->n_channels
+ /* supported channels */
394 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
395 2 + sizeof(struct ieee80211_vht_capabilities
) + /* VHT */
396 assoc_data
->ie_len
+ /* extra IEs */
402 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
404 capab
= WLAN_CAPABILITY_ESS
;
406 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
407 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
408 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
409 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
410 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
413 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
414 capab
|= WLAN_CAPABILITY_PRIVACY
;
416 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
417 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
418 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
420 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
422 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
423 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
424 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
426 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
428 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
429 IEEE80211_STYPE_REASSOC_REQ
);
430 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
431 mgmt
->u
.reassoc_req
.listen_interval
=
432 cpu_to_le16(local
->hw
.conf
.listen_interval
);
433 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
437 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
438 IEEE80211_STYPE_ASSOC_REQ
);
439 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
440 mgmt
->u
.assoc_req
.listen_interval
=
441 cpu_to_le16(local
->hw
.conf
.listen_interval
);
445 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
446 *pos
++ = WLAN_EID_SSID
;
447 *pos
++ = assoc_data
->ssid_len
;
448 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
450 /* add all rates which were marked to be used above */
451 supp_rates_len
= rates_len
;
452 if (supp_rates_len
> 8)
455 pos
= skb_put(skb
, supp_rates_len
+ 2);
456 *pos
++ = WLAN_EID_SUPP_RATES
;
457 *pos
++ = supp_rates_len
;
460 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
461 if (BIT(i
) & rates
) {
462 int rate
= sband
->bitrates
[i
].bitrate
;
463 *pos
++ = (u8
) (rate
/ 5);
469 if (rates_len
> count
) {
470 pos
= skb_put(skb
, rates_len
- count
+ 2);
471 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
472 *pos
++ = rates_len
- count
;
474 for (i
++; i
< sband
->n_bitrates
; i
++) {
475 if (BIT(i
) & rates
) {
476 int rate
= sband
->bitrates
[i
].bitrate
;
477 *pos
++ = (u8
) (rate
/ 5);
482 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
483 /* 1. power capabilities */
484 pos
= skb_put(skb
, 4);
485 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
487 *pos
++ = 0; /* min tx power */
488 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
490 /* 2. supported channels */
491 /* TODO: get this in reg domain format */
492 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
493 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
494 *pos
++ = 2 * sband
->n_channels
;
495 for (i
= 0; i
< sband
->n_channels
; i
++) {
496 *pos
++ = ieee80211_frequency_to_channel(
497 sband
->channels
[i
].center_freq
);
498 *pos
++ = 1; /* one channel in the subband*/
502 /* if present, add any custom IEs that go before HT */
503 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
504 static const u8 before_ht
[] = {
507 WLAN_EID_EXT_SUPP_RATES
,
508 WLAN_EID_PWR_CAPABILITY
,
509 WLAN_EID_SUPPORTED_CHANNELS
,
512 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
513 WLAN_EID_MOBILITY_DOMAIN
,
514 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
516 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
517 before_ht
, ARRAY_SIZE(before_ht
),
519 pos
= skb_put(skb
, noffset
- offset
);
520 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
524 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
525 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
526 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
528 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
529 ieee80211_add_vht_ie(sdata
, skb
, sband
);
531 /* if present, add any custom non-vendor IEs that go after HT */
532 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
533 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
536 pos
= skb_put(skb
, noffset
- offset
);
537 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
541 if (assoc_data
->wmm
) {
542 if (assoc_data
->uapsd
) {
543 qos_info
= ifmgd
->uapsd_queues
;
544 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
545 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
550 pos
= skb_put(skb
, 9);
551 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
552 *pos
++ = 7; /* len */
553 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
556 *pos
++ = 2; /* WME */
557 *pos
++ = 0; /* WME info */
558 *pos
++ = 1; /* WME ver */
562 /* add any remaining custom (i.e. vendor specific here) IEs */
563 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
564 noffset
= assoc_data
->ie_len
;
565 pos
= skb_put(skb
, noffset
- offset
);
566 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
569 drv_mgd_prepare_tx(local
, sdata
);
571 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
572 ieee80211_tx_skb(sdata
, skb
);
575 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
576 struct ieee80211_sub_if_data
*sdata
)
578 struct ieee80211_pspoll
*pspoll
;
581 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
585 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
586 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
588 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
589 ieee80211_tx_skb(sdata
, skb
);
592 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
593 struct ieee80211_sub_if_data
*sdata
,
597 struct ieee80211_hdr_3addr
*nullfunc
;
598 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
600 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
604 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
606 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
608 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
609 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
610 IEEE80211_STA_CONNECTION_POLL
))
611 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
613 ieee80211_tx_skb(sdata
, skb
);
616 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
617 struct ieee80211_sub_if_data
*sdata
)
620 struct ieee80211_hdr
*nullfunc
;
623 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
626 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
630 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
632 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
633 memset(nullfunc
, 0, 30);
634 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
635 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
636 nullfunc
->frame_control
= fc
;
637 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
638 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
639 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
640 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
642 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
643 ieee80211_tx_skb(sdata
, skb
);
646 /* spectrum management related things */
647 static void ieee80211_chswitch_work(struct work_struct
*work
)
649 struct ieee80211_sub_if_data
*sdata
=
650 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
651 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
653 if (!ieee80211_sdata_running(sdata
))
656 mutex_lock(&ifmgd
->mtx
);
657 if (!ifmgd
->associated
)
660 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
661 if (!sdata
->local
->ops
->channel_switch
) {
662 /* call "hw_config" only if doing sw channel switch */
663 ieee80211_hw_config(sdata
->local
,
664 IEEE80211_CONF_CHANGE_CHANNEL
);
666 /* update the device channel directly */
667 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
670 /* XXX: shouldn't really modify cfg80211-owned data! */
671 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
673 /* XXX: wait for a beacon first? */
674 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
675 IEEE80211_QUEUE_STOP_REASON_CSA
);
677 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
678 mutex_unlock(&ifmgd
->mtx
);
681 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
683 struct ieee80211_sub_if_data
*sdata
;
684 struct ieee80211_if_managed
*ifmgd
;
686 sdata
= vif_to_sdata(vif
);
687 ifmgd
= &sdata
->u
.mgd
;
689 trace_api_chswitch_done(sdata
, success
);
692 "driver channel switch failed, disconnecting\n");
693 ieee80211_queue_work(&sdata
->local
->hw
,
694 &ifmgd
->csa_connection_drop_work
);
696 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
699 EXPORT_SYMBOL(ieee80211_chswitch_done
);
701 static void ieee80211_chswitch_timer(unsigned long data
)
703 struct ieee80211_sub_if_data
*sdata
=
704 (struct ieee80211_sub_if_data
*) data
;
705 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
707 if (sdata
->local
->quiescing
) {
708 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
712 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
715 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
716 struct ieee80211_channel_sw_ie
*sw_elem
,
717 struct ieee80211_bss
*bss
,
720 struct cfg80211_bss
*cbss
=
721 container_of((void *)bss
, struct cfg80211_bss
, priv
);
722 struct ieee80211_channel
*new_ch
;
723 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
724 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
725 cbss
->channel
->band
);
727 ASSERT_MGD_MTX(ifmgd
);
729 if (!ifmgd
->associated
)
732 if (sdata
->local
->scanning
)
735 /* Disregard subsequent beacons if we are already running a timer
738 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
741 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
742 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
744 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
745 ifmgd
->associated
->bssid
, new_freq
);
746 ieee80211_queue_work(&sdata
->local
->hw
,
747 &ifmgd
->csa_connection_drop_work
);
751 sdata
->local
->csa_channel
= new_ch
;
753 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
756 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
757 IEEE80211_QUEUE_STOP_REASON_CSA
);
759 if (sdata
->local
->ops
->channel_switch
) {
760 /* use driver's channel switch callback */
761 struct ieee80211_channel_switch ch_switch
= {
762 .timestamp
= timestamp
,
763 .block_tx
= sw_elem
->mode
,
765 .count
= sw_elem
->count
,
768 drv_channel_switch(sdata
->local
, &ch_switch
);
772 /* channel switch handled in software */
773 if (sw_elem
->count
<= 1)
774 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
776 mod_timer(&ifmgd
->chswitch_timer
,
777 TU_TO_EXP_TIME(sw_elem
->count
*
778 cbss
->beacon_interval
));
781 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
782 struct ieee80211_channel
*channel
,
783 const u8
*country_ie
, u8 country_ie_len
,
784 const u8
*pwr_constr_elem
)
786 struct ieee80211_country_ie_triplet
*triplet
;
787 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
788 int i
, chan_pwr
, chan_increment
, new_ap_level
;
789 bool have_chan_pwr
= false;
792 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
795 triplet
= (void *)(country_ie
+ 3);
798 switch (channel
->band
) {
802 case IEEE80211_BAND_2GHZ
:
803 case IEEE80211_BAND_60GHZ
:
806 case IEEE80211_BAND_5GHZ
:
812 while (country_ie_len
>= 3) {
813 u8 first_channel
= triplet
->chans
.first_channel
;
815 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
818 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
819 if (first_channel
+ i
* chan_increment
== chan
) {
820 have_chan_pwr
= true;
821 chan_pwr
= triplet
->chans
.max_power
;
836 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
838 if (sdata
->local
->ap_power_level
== new_ap_level
)
842 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
843 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
845 sdata
->local
->ap_power_level
= new_ap_level
;
846 ieee80211_hw_config(sdata
->local
, 0);
849 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
851 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
852 struct ieee80211_local
*local
= sdata
->local
;
853 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
855 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
856 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
857 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
859 local
->disable_dynamic_ps
= false;
860 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
862 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
864 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
866 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
867 struct ieee80211_local
*local
= sdata
->local
;
868 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
870 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
871 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
872 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
874 local
->disable_dynamic_ps
= true;
875 conf
->dynamic_ps_timeout
= 0;
876 del_timer_sync(&local
->dynamic_ps_timer
);
877 ieee80211_queue_work(&local
->hw
,
878 &local
->dynamic_ps_enable_work
);
880 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
883 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
884 struct ieee80211_sub_if_data
*sdata
)
886 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
889 * If we are scanning right now then the parameters will
890 * take effect when scan finishes.
895 if (conf
->dynamic_ps_timeout
> 0 &&
896 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
897 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
898 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
900 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
901 ieee80211_send_nullfunc(local
, sdata
, 1);
903 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
904 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
907 conf
->flags
|= IEEE80211_CONF_PS
;
908 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
912 static void ieee80211_change_ps(struct ieee80211_local
*local
)
914 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
916 if (local
->ps_sdata
) {
917 ieee80211_enable_ps(local
, local
->ps_sdata
);
918 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
919 conf
->flags
&= ~IEEE80211_CONF_PS
;
920 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
921 del_timer_sync(&local
->dynamic_ps_timer
);
922 cancel_work_sync(&local
->dynamic_ps_enable_work
);
926 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
928 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
929 struct sta_info
*sta
= NULL
;
930 bool authorized
= false;
938 if (!mgd
->associated
)
941 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
942 IEEE80211_STA_CONNECTION_POLL
))
946 sta
= sta_info_get(sdata
, mgd
->bssid
);
948 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
954 /* need to hold RTNL or interface lock */
955 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
957 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
961 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
962 local
->ps_sdata
= NULL
;
966 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
967 if (!ieee80211_sdata_running(sdata
))
969 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
970 /* If an AP vif is found, then disable PS
971 * by setting the count to zero thereby setting
977 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
983 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
984 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
988 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
990 beaconint_us
= ieee80211_tu_to_usec(
991 found
->vif
.bss_conf
.beacon_int
);
993 timeout
= local
->dynamic_ps_forced_timeout
;
996 * Go to full PSM if the user configures a very low
997 * latency requirement.
998 * The 2000 second value is there for compatibility
999 * until the PM_QOS_NETWORK_LATENCY is configured
1002 if (latency
> (1900 * USEC_PER_MSEC
) &&
1003 latency
!= (2000 * USEC_PER_SEC
))
1008 local
->dynamic_ps_user_timeout
= timeout
;
1009 if (!local
->disable_dynamic_ps
)
1010 conf
->dynamic_ps_timeout
=
1011 local
->dynamic_ps_user_timeout
;
1013 if (beaconint_us
> latency
) {
1014 local
->ps_sdata
= NULL
;
1016 struct ieee80211_bss
*bss
;
1020 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1021 dtimper
= bss
->dtim_period
;
1023 /* If the TIM IE is invalid, pretend the value is 1 */
1026 else if (dtimper
> 1)
1027 maxslp
= min_t(int, dtimper
,
1028 latency
/ beaconint_us
);
1030 local
->hw
.conf
.max_sleep_period
= maxslp
;
1031 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1032 local
->ps_sdata
= found
;
1035 local
->ps_sdata
= NULL
;
1038 ieee80211_change_ps(local
);
1041 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1043 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1045 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1046 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1047 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1051 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1053 struct ieee80211_local
*local
=
1054 container_of(work
, struct ieee80211_local
,
1055 dynamic_ps_disable_work
);
1057 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1058 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1059 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1062 ieee80211_wake_queues_by_reason(&local
->hw
,
1063 IEEE80211_QUEUE_STOP_REASON_PS
);
1066 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1068 struct ieee80211_local
*local
=
1069 container_of(work
, struct ieee80211_local
,
1070 dynamic_ps_enable_work
);
1071 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1072 struct ieee80211_if_managed
*ifmgd
;
1073 unsigned long flags
;
1076 /* can only happen when PS was just disabled anyway */
1080 ifmgd
= &sdata
->u
.mgd
;
1082 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1085 if (!local
->disable_dynamic_ps
&&
1086 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1087 /* don't enter PS if TX frames are pending */
1088 if (drv_tx_frames_pending(local
)) {
1089 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1091 local
->hw
.conf
.dynamic_ps_timeout
));
1096 * transmission can be stopped by others which leads to
1097 * dynamic_ps_timer expiry. Postpone the ps timer if it
1098 * is not the actual idle state.
1100 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1101 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1102 if (local
->queue_stop_reasons
[q
]) {
1103 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1105 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1107 local
->hw
.conf
.dynamic_ps_timeout
));
1111 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1114 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1115 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1116 netif_tx_stop_all_queues(sdata
->dev
);
1118 if (drv_tx_frames_pending(local
))
1119 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1121 local
->hw
.conf
.dynamic_ps_timeout
));
1123 ieee80211_send_nullfunc(local
, sdata
, 1);
1124 /* Flush to get the tx status of nullfunc frame */
1125 drv_flush(local
, false);
1129 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1130 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1131 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1132 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1133 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1134 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1137 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1138 netif_tx_wake_all_queues(sdata
->dev
);
1141 void ieee80211_dynamic_ps_timer(unsigned long data
)
1143 struct ieee80211_local
*local
= (void *) data
;
1145 if (local
->quiescing
|| local
->suspended
)
1148 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1152 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1153 struct ieee80211_sub_if_data
*sdata
,
1154 u8
*wmm_param
, size_t wmm_param_len
)
1156 struct ieee80211_tx_queue_params params
;
1157 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1160 u8
*pos
, uapsd_queues
= 0;
1162 if (!local
->ops
->conf_tx
)
1165 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1171 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1174 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1175 uapsd_queues
= ifmgd
->uapsd_queues
;
1177 count
= wmm_param
[6] & 0x0f;
1178 if (count
== ifmgd
->wmm_last_param_set
)
1180 ifmgd
->wmm_last_param_set
= count
;
1182 pos
= wmm_param
+ 8;
1183 left
= wmm_param_len
- 8;
1185 memset(¶ms
, 0, sizeof(params
));
1188 for (; left
>= 4; left
-= 4, pos
+= 4) {
1189 int aci
= (pos
[0] >> 5) & 0x03;
1190 int acm
= (pos
[0] >> 4) & 0x01;
1198 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1199 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1205 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1206 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1212 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1213 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1220 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1221 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1226 params
.aifs
= pos
[0] & 0x0f;
1227 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1228 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1229 params
.txop
= get_unaligned_le16(pos
+ 2);
1230 params
.uapsd
= uapsd
;
1233 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1235 params
.aifs
, params
.cw_min
, params
.cw_max
,
1236 params
.txop
, params
.uapsd
);
1237 sdata
->tx_conf
[queue
] = params
;
1238 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1240 "failed to set TX queue parameters for queue %d\n",
1244 /* enable WMM or activate new settings */
1245 sdata
->vif
.bss_conf
.qos
= true;
1249 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1251 lockdep_assert_held(&sdata
->local
->mtx
);
1253 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1254 IEEE80211_STA_BEACON_POLL
);
1255 ieee80211_run_deferred_scan(sdata
->local
);
1258 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1260 mutex_lock(&sdata
->local
->mtx
);
1261 __ieee80211_stop_poll(sdata
);
1262 mutex_unlock(&sdata
->local
->mtx
);
1265 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1266 u16 capab
, bool erp_valid
, u8 erp
)
1268 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1270 bool use_protection
;
1271 bool use_short_preamble
;
1272 bool use_short_slot
;
1275 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1276 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1278 use_protection
= false;
1279 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1282 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1283 if (sdata
->local
->oper_channel
->band
== IEEE80211_BAND_5GHZ
)
1284 use_short_slot
= true;
1286 if (use_protection
!= bss_conf
->use_cts_prot
) {
1287 bss_conf
->use_cts_prot
= use_protection
;
1288 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1291 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1292 bss_conf
->use_short_preamble
= use_short_preamble
;
1293 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1296 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1297 bss_conf
->use_short_slot
= use_short_slot
;
1298 changed
|= BSS_CHANGED_ERP_SLOT
;
1304 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1305 struct cfg80211_bss
*cbss
,
1306 u32 bss_info_changed
)
1308 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1309 struct ieee80211_local
*local
= sdata
->local
;
1310 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1312 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1313 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1314 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1316 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1317 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1319 sdata
->u
.mgd
.associated
= cbss
;
1320 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1322 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1324 /* just to be sure */
1325 ieee80211_stop_poll(sdata
);
1327 ieee80211_led_assoc(local
, 1);
1329 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1330 bss_conf
->dtim_period
= bss
->dtim_period
;
1332 bss_conf
->dtim_period
= 0;
1334 bss_conf
->assoc
= 1;
1336 /* Tell the driver to monitor connection quality (if supported) */
1337 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1338 bss_conf
->cqm_rssi_thold
)
1339 bss_info_changed
|= BSS_CHANGED_CQM
;
1341 /* Enable ARP filtering */
1342 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1343 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1344 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1347 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1349 mutex_lock(&local
->iflist_mtx
);
1350 ieee80211_recalc_ps(local
, -1);
1351 mutex_unlock(&local
->iflist_mtx
);
1353 ieee80211_recalc_smps(local
);
1354 ieee80211_recalc_ps_vif(sdata
);
1356 netif_tx_start_all_queues(sdata
->dev
);
1357 netif_carrier_on(sdata
->dev
);
1360 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1361 u16 stype
, u16 reason
, bool tx
,
1364 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1365 struct ieee80211_local
*local
= sdata
->local
;
1366 struct sta_info
*sta
;
1369 ASSERT_MGD_MTX(ifmgd
);
1371 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1374 if (WARN_ON(!ifmgd
->associated
))
1377 ieee80211_stop_poll(sdata
);
1379 ifmgd
->associated
= NULL
;
1382 * we need to commit the associated = NULL change because the
1383 * scan code uses that to determine whether this iface should
1384 * go to/wake up from powersave or not -- and could otherwise
1385 * wake the queues erroneously.
1390 * Thus, we can only afterwards stop the queues -- to account
1391 * for the case where another CPU is finishing a scan at this
1392 * time -- we don't want the scan code to enable queues.
1395 netif_tx_stop_all_queues(sdata
->dev
);
1396 netif_carrier_off(sdata
->dev
);
1398 mutex_lock(&local
->sta_mtx
);
1399 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1401 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1402 ieee80211_sta_tear_down_BA_sessions(sta
, false);
1404 mutex_unlock(&local
->sta_mtx
);
1407 * if we want to get out of ps before disassoc (why?) we have
1408 * to do it before sending disassoc, as otherwise the null-packet
1411 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1412 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1413 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1415 local
->ps_sdata
= NULL
;
1417 /* disable per-vif ps */
1418 ieee80211_recalc_ps_vif(sdata
);
1420 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1422 drv_flush(local
, false);
1424 /* deauthenticate/disassociate now */
1425 if (tx
|| frame_buf
)
1426 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1427 reason
, tx
, frame_buf
);
1429 /* flush out frame */
1431 drv_flush(local
, false);
1433 /* clear bssid only after building the needed mgmt frames */
1434 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1436 /* remove AP and TDLS peers */
1437 sta_info_flush(local
, sdata
);
1439 /* finally reset all BSS / config parameters */
1440 changed
|= ieee80211_reset_erp_info(sdata
);
1442 ieee80211_led_assoc(local
, 0);
1443 changed
|= BSS_CHANGED_ASSOC
;
1444 sdata
->vif
.bss_conf
.assoc
= false;
1446 /* on the next assoc, re-program HT parameters */
1447 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1448 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1450 local
->ap_power_level
= 0;
1452 del_timer_sync(&local
->dynamic_ps_timer
);
1453 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1455 /* Disable ARP filtering */
1456 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1457 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1458 changed
|= BSS_CHANGED_ARP_FILTER
;
1461 sdata
->vif
.bss_conf
.qos
= false;
1462 changed
|= BSS_CHANGED_QOS
;
1464 /* The BSSID (not really interesting) and HT changed */
1465 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1466 ieee80211_bss_info_change_notify(sdata
, changed
);
1468 /* channel(_type) changes are handled by ieee80211_hw_config */
1469 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1470 ieee80211_hw_config(local
, 0);
1472 /* disassociated - set to defaults now */
1473 ieee80211_set_wmm_default(sdata
, false);
1475 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1476 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1477 del_timer_sync(&sdata
->u
.mgd
.timer
);
1478 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1480 sdata
->u
.mgd
.timers_running
= 0;
1483 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1484 struct ieee80211_hdr
*hdr
)
1487 * We can postpone the mgd.timer whenever receiving unicast frames
1488 * from AP because we know that the connection is working both ways
1489 * at that time. But multicast frames (and hence also beacons) must
1490 * be ignored here, because we need to trigger the timer during
1491 * data idle periods for sending the periodic probe request to the
1492 * AP we're connected to.
1494 if (is_multicast_ether_addr(hdr
->addr1
))
1497 ieee80211_sta_reset_conn_monitor(sdata
);
1500 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1502 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1503 struct ieee80211_local
*local
= sdata
->local
;
1505 mutex_lock(&local
->mtx
);
1506 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1507 IEEE80211_STA_CONNECTION_POLL
))) {
1508 mutex_unlock(&local
->mtx
);
1512 __ieee80211_stop_poll(sdata
);
1514 mutex_lock(&local
->iflist_mtx
);
1515 ieee80211_recalc_ps(local
, -1);
1516 mutex_unlock(&local
->iflist_mtx
);
1518 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1522 * We've received a probe response, but are not sure whether
1523 * we have or will be receiving any beacons or data, so let's
1524 * schedule the timers again, just in case.
1526 ieee80211_sta_reset_beacon_monitor(sdata
);
1528 mod_timer(&ifmgd
->conn_mon_timer
,
1529 round_jiffies_up(jiffies
+
1530 IEEE80211_CONNECTION_IDLE_TIME
));
1532 mutex_unlock(&local
->mtx
);
1535 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1536 struct ieee80211_hdr
*hdr
, bool ack
)
1538 if (!ieee80211_is_data(hdr
->frame_control
))
1542 ieee80211_sta_reset_conn_monitor(sdata
);
1544 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1545 sdata
->u
.mgd
.probe_send_count
> 0) {
1547 sdata
->u
.mgd
.probe_send_count
= 0;
1549 sdata
->u
.mgd
.nullfunc_failed
= true;
1550 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1554 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1556 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1558 u8
*dst
= ifmgd
->associated
->bssid
;
1559 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1562 * Try sending broadcast probe requests for the last three
1563 * probe requests after the first ones failed since some
1564 * buggy APs only support broadcast probe requests.
1566 if (ifmgd
->probe_send_count
>= unicast_limit
)
1570 * When the hardware reports an accurate Tx ACK status, it's
1571 * better to send a nullfunc frame instead of a probe request,
1572 * as it will kick us off the AP quickly if we aren't associated
1573 * anymore. The timeout will be reset if the frame is ACKed by
1576 ifmgd
->probe_send_count
++;
1578 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1579 ifmgd
->nullfunc_failed
= false;
1580 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1584 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1585 if (WARN_ON_ONCE(ssid
== NULL
))
1590 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1591 0, (u32
) -1, true, false,
1592 ifmgd
->associated
->channel
);
1595 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1596 run_again(ifmgd
, ifmgd
->probe_timeout
);
1597 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1598 drv_flush(sdata
->local
, false);
1601 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1604 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1605 bool already
= false;
1607 if (!ieee80211_sdata_running(sdata
))
1610 mutex_lock(&ifmgd
->mtx
);
1612 if (!ifmgd
->associated
)
1615 mutex_lock(&sdata
->local
->mtx
);
1617 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1618 mutex_unlock(&sdata
->local
->mtx
);
1623 mlme_dbg_ratelimited(sdata
,
1624 "detected beacon loss from AP - sending probe request\n");
1626 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1627 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1630 * The driver/our work has already reported this event or the
1631 * connection monitoring has kicked in and we have already sent
1632 * a probe request. Or maybe the AP died and the driver keeps
1633 * reporting until we disassociate...
1635 * In either case we have to ignore the current call to this
1636 * function (except for setting the correct probe reason bit)
1637 * because otherwise we would reset the timer every time and
1638 * never check whether we received a probe response!
1640 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1641 IEEE80211_STA_CONNECTION_POLL
))
1645 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1647 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1649 mutex_unlock(&sdata
->local
->mtx
);
1654 mutex_lock(&sdata
->local
->iflist_mtx
);
1655 ieee80211_recalc_ps(sdata
->local
, -1);
1656 mutex_unlock(&sdata
->local
->iflist_mtx
);
1658 ifmgd
->probe_send_count
= 0;
1659 ieee80211_mgd_probe_ap_send(sdata
);
1661 mutex_unlock(&ifmgd
->mtx
);
1664 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1665 struct ieee80211_vif
*vif
)
1667 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1668 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1669 struct cfg80211_bss
*cbss
;
1670 struct sk_buff
*skb
;
1674 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1677 ASSERT_MGD_MTX(ifmgd
);
1679 if (ifmgd
->associated
)
1680 cbss
= ifmgd
->associated
;
1681 else if (ifmgd
->auth_data
)
1682 cbss
= ifmgd
->auth_data
->bss
;
1683 else if (ifmgd
->assoc_data
)
1684 cbss
= ifmgd
->assoc_data
->bss
;
1688 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1689 if (WARN_ON_ONCE(ssid
== NULL
))
1694 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1696 sdata
->local
->oper_channel
,
1702 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1704 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
,
1705 bool transmit_frame
)
1707 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1708 struct ieee80211_local
*local
= sdata
->local
;
1709 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1711 mutex_lock(&ifmgd
->mtx
);
1712 if (!ifmgd
->associated
) {
1713 mutex_unlock(&ifmgd
->mtx
);
1717 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1718 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1719 transmit_frame
, frame_buf
);
1720 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1721 mutex_unlock(&ifmgd
->mtx
);
1724 * must be outside lock due to cfg80211,
1725 * but that's not a problem.
1727 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1729 mutex_lock(&local
->mtx
);
1730 ieee80211_recalc_idle(local
);
1731 mutex_unlock(&local
->mtx
);
1734 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1736 struct ieee80211_sub_if_data
*sdata
=
1737 container_of(work
, struct ieee80211_sub_if_data
,
1738 u
.mgd
.beacon_connection_loss_work
);
1739 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1740 struct sta_info
*sta
;
1742 if (ifmgd
->associated
) {
1744 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1746 sta
->beacon_loss_count
++;
1750 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
) {
1751 sdata_info(sdata
, "Connection to AP %pM lost\n",
1753 __ieee80211_disconnect(sdata
, false);
1755 ieee80211_mgd_probe_ap(sdata
, true);
1759 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1761 struct ieee80211_sub_if_data
*sdata
=
1762 container_of(work
, struct ieee80211_sub_if_data
,
1763 u
.mgd
.csa_connection_drop_work
);
1765 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1766 IEEE80211_QUEUE_STOP_REASON_CSA
);
1767 __ieee80211_disconnect(sdata
, true);
1770 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1772 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1773 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1775 trace_api_beacon_loss(sdata
);
1777 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1778 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1780 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1782 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1784 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1785 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1787 trace_api_connection_loss(sdata
);
1789 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1790 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1792 EXPORT_SYMBOL(ieee80211_connection_loss
);
1795 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1798 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1800 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1803 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1805 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1806 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1809 cfg80211_put_bss(auth_data
->bss
);
1811 sdata
->u
.mgd
.auth_data
= NULL
;
1814 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1815 struct ieee80211_mgmt
*mgmt
, size_t len
)
1817 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1819 struct ieee802_11_elems elems
;
1821 pos
= mgmt
->u
.auth
.variable
;
1822 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1823 if (!elems
.challenge
)
1825 auth_data
->expected_transaction
= 4;
1826 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1827 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1828 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1829 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1830 auth_data
->key
, auth_data
->key_len
,
1831 auth_data
->key_idx
);
1834 static enum rx_mgmt_action __must_check
1835 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1836 struct ieee80211_mgmt
*mgmt
, size_t len
)
1838 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1840 u16 auth_alg
, auth_transaction
, status_code
;
1841 struct sta_info
*sta
;
1843 lockdep_assert_held(&ifmgd
->mtx
);
1846 return RX_MGMT_NONE
;
1848 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1849 return RX_MGMT_NONE
;
1851 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1853 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1854 return RX_MGMT_NONE
;
1856 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1857 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1858 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1860 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1861 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1862 return RX_MGMT_NONE
;
1864 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1865 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1866 mgmt
->sa
, status_code
);
1867 ieee80211_destroy_auth_data(sdata
, false);
1868 return RX_MGMT_CFG80211_RX_AUTH
;
1871 switch (ifmgd
->auth_data
->algorithm
) {
1872 case WLAN_AUTH_OPEN
:
1873 case WLAN_AUTH_LEAP
:
1876 case WLAN_AUTH_SHARED_KEY
:
1877 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1878 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1879 /* need another frame */
1880 return RX_MGMT_NONE
;
1884 WARN_ONCE(1, "invalid auth alg %d",
1885 ifmgd
->auth_data
->algorithm
);
1886 return RX_MGMT_NONE
;
1889 sdata_info(sdata
, "authenticated\n");
1890 ifmgd
->auth_data
->done
= true;
1891 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1892 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1894 /* move station state to auth */
1895 mutex_lock(&sdata
->local
->sta_mtx
);
1896 sta
= sta_info_get(sdata
, bssid
);
1898 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1901 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1902 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
1905 mutex_unlock(&sdata
->local
->sta_mtx
);
1907 return RX_MGMT_CFG80211_RX_AUTH
;
1909 mutex_unlock(&sdata
->local
->sta_mtx
);
1910 /* ignore frame -- wait for timeout */
1911 return RX_MGMT_NONE
;
1915 static enum rx_mgmt_action __must_check
1916 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1917 struct ieee80211_mgmt
*mgmt
, size_t len
)
1919 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1920 const u8
*bssid
= NULL
;
1923 lockdep_assert_held(&ifmgd
->mtx
);
1926 return RX_MGMT_NONE
;
1928 if (!ifmgd
->associated
||
1929 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1930 return RX_MGMT_NONE
;
1932 bssid
= ifmgd
->associated
->bssid
;
1934 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1936 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
1937 bssid
, reason_code
);
1939 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1941 mutex_lock(&sdata
->local
->mtx
);
1942 ieee80211_recalc_idle(sdata
->local
);
1943 mutex_unlock(&sdata
->local
->mtx
);
1945 return RX_MGMT_CFG80211_DEAUTH
;
1949 static enum rx_mgmt_action __must_check
1950 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1951 struct ieee80211_mgmt
*mgmt
, size_t len
)
1953 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1956 lockdep_assert_held(&ifmgd
->mtx
);
1959 return RX_MGMT_NONE
;
1961 if (!ifmgd
->associated
||
1962 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1963 return RX_MGMT_NONE
;
1965 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1967 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
1968 mgmt
->sa
, reason_code
);
1970 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1972 mutex_lock(&sdata
->local
->mtx
);
1973 ieee80211_recalc_idle(sdata
->local
);
1974 mutex_unlock(&sdata
->local
->mtx
);
1976 return RX_MGMT_CFG80211_DISASSOC
;
1979 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1980 u8
*supp_rates
, unsigned int supp_rates_len
,
1981 u32
*rates
, u32
*basic_rates
,
1982 bool *have_higher_than_11mbit
,
1983 int *min_rate
, int *min_rate_index
)
1987 for (i
= 0; i
< supp_rates_len
; i
++) {
1988 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1989 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1992 *have_higher_than_11mbit
= true;
1995 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1996 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1998 * Note: Even through the membership selector and the basic
1999 * rate flag share the same bit, they are not exactly
2002 if (!!(supp_rates
[i
] & 0x80) &&
2003 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2006 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2007 if (sband
->bitrates
[j
].bitrate
== rate
) {
2010 *basic_rates
|= BIT(j
);
2011 if (rate
< *min_rate
) {
2013 *min_rate_index
= j
;
2021 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2024 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2026 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2029 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2031 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2032 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2036 sdata
->u
.mgd
.assoc_data
= NULL
;
2039 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2040 struct cfg80211_bss
*cbss
,
2041 struct ieee80211_mgmt
*mgmt
, size_t len
)
2043 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2044 struct ieee80211_local
*local
= sdata
->local
;
2045 struct ieee80211_supported_band
*sband
;
2046 struct sta_info
*sta
;
2048 u16 capab_info
, aid
;
2049 struct ieee802_11_elems elems
;
2050 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2054 /* AssocResp and ReassocResp have identical structure */
2056 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2057 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2059 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2060 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2062 aid
&= ~(BIT(15) | BIT(14));
2064 ifmgd
->broken_ap
= false;
2066 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2067 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2070 ifmgd
->broken_ap
= true;
2073 pos
= mgmt
->u
.assoc_resp
.variable
;
2074 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2076 if (!elems
.supp_rates
) {
2077 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2083 mutex_lock(&sdata
->local
->sta_mtx
);
2085 * station info was already allocated and inserted before
2086 * the association and should be available to us
2088 sta
= sta_info_get(sdata
, cbss
->bssid
);
2089 if (WARN_ON(!sta
)) {
2090 mutex_unlock(&sdata
->local
->sta_mtx
);
2094 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2096 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2097 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2098 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2100 sta
->supports_40mhz
=
2101 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2103 rate_control_rate_init(sta
);
2105 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2106 set_sta_flag(sta
, WLAN_STA_MFP
);
2108 if (elems
.wmm_param
)
2109 set_sta_flag(sta
, WLAN_STA_WME
);
2111 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2113 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2114 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2115 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2118 "failed to move station %pM to desired state\n",
2120 WARN_ON(__sta_info_destroy(sta
));
2121 mutex_unlock(&sdata
->local
->sta_mtx
);
2125 mutex_unlock(&sdata
->local
->sta_mtx
);
2128 * Always handle WMM once after association regardless
2129 * of the first value the AP uses. Setting -1 here has
2130 * that effect because the AP values is an unsigned
2133 ifmgd
->wmm_last_param_set
= -1;
2135 if (elems
.wmm_param
)
2136 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2137 elems
.wmm_param_len
);
2139 ieee80211_set_wmm_default(sdata
, false);
2140 changed
|= BSS_CHANGED_QOS
;
2142 if (elems
.ht_operation
&& elems
.wmm_param
&&
2143 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2144 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2145 cbss
->bssid
, false);
2147 /* set AID and assoc capability,
2148 * ieee80211_set_associated() will tell the driver */
2149 bss_conf
->aid
= aid
;
2150 bss_conf
->assoc_capability
= capab_info
;
2151 ieee80211_set_associated(sdata
, cbss
, changed
);
2154 * If we're using 4-addr mode, let the AP know that we're
2155 * doing so, so that it can create the STA VLAN on its side
2157 if (ifmgd
->use_4addr
)
2158 ieee80211_send_4addr_nullfunc(local
, sdata
);
2161 * Start timer to probe the connection to the AP now.
2162 * Also start the timer that will detect beacon loss.
2164 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2165 ieee80211_sta_reset_beacon_monitor(sdata
);
2170 static enum rx_mgmt_action __must_check
2171 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2172 struct ieee80211_mgmt
*mgmt
, size_t len
,
2173 struct cfg80211_bss
**bss
)
2175 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2176 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2177 u16 capab_info
, status_code
, aid
;
2178 struct ieee802_11_elems elems
;
2182 lockdep_assert_held(&ifmgd
->mtx
);
2185 return RX_MGMT_NONE
;
2186 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2187 return RX_MGMT_NONE
;
2190 * AssocResp and ReassocResp have identical structure, so process both
2191 * of them in this function.
2195 return RX_MGMT_NONE
;
2197 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2198 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2199 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2200 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2203 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2204 reassoc
? "Rea" : "A", mgmt
->sa
,
2205 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2207 pos
= mgmt
->u
.assoc_resp
.variable
;
2208 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2210 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2211 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2212 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2214 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2215 ms
= tu
* 1024 / 1000;
2217 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2219 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2220 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2221 run_again(ifmgd
, assoc_data
->timeout
);
2222 return RX_MGMT_NONE
;
2225 *bss
= assoc_data
->bss
;
2227 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2228 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2229 mgmt
->sa
, status_code
);
2230 ieee80211_destroy_assoc_data(sdata
, false);
2232 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2233 /* oops -- internal error -- send timeout for now */
2234 ieee80211_destroy_assoc_data(sdata
, false);
2235 cfg80211_put_bss(*bss
);
2236 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2238 sdata_info(sdata
, "associated\n");
2241 * destroy assoc_data afterwards, as otherwise an idle
2242 * recalc after assoc_data is NULL but before associated
2243 * is set can cause the interface to go idle
2245 ieee80211_destroy_assoc_data(sdata
, true);
2248 return RX_MGMT_CFG80211_RX_ASSOC
;
2250 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2251 struct ieee80211_mgmt
*mgmt
,
2253 struct ieee80211_rx_status
*rx_status
,
2254 struct ieee802_11_elems
*elems
,
2257 struct ieee80211_local
*local
= sdata
->local
;
2259 struct ieee80211_bss
*bss
;
2260 struct ieee80211_channel
*channel
;
2261 bool need_ps
= false;
2263 if (sdata
->u
.mgd
.associated
&&
2264 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2265 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2266 /* not previously set so we may need to recalc */
2267 need_ps
= !bss
->dtim_period
;
2270 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2271 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2274 freq
= rx_status
->freq
;
2276 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2278 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2281 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2284 ieee80211_rx_bss_put(local
, bss
);
2286 if (!sdata
->u
.mgd
.associated
)
2290 mutex_lock(&local
->iflist_mtx
);
2291 ieee80211_recalc_ps(local
, -1);
2292 mutex_unlock(&local
->iflist_mtx
);
2295 if (elems
->ch_switch_ie
&&
2296 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2297 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2298 bss
, rx_status
->mactime
);
2302 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2303 struct sk_buff
*skb
)
2305 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2306 struct ieee80211_if_managed
*ifmgd
;
2307 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2308 size_t baselen
, len
= skb
->len
;
2309 struct ieee802_11_elems elems
;
2311 ifmgd
= &sdata
->u
.mgd
;
2313 ASSERT_MGD_MTX(ifmgd
);
2315 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2316 return; /* ignore ProbeResp to foreign address */
2318 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2322 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2325 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2327 if (ifmgd
->associated
&&
2328 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2329 ieee80211_reset_ap_probe(sdata
);
2331 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2332 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2333 /* got probe response, continue with auth */
2334 sdata_info(sdata
, "direct probe responded\n");
2335 ifmgd
->auth_data
->tries
= 0;
2336 ifmgd
->auth_data
->timeout
= jiffies
;
2337 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2342 * This is the canonical list of information elements we care about,
2343 * the filter code also gives us all changes to the Microsoft OUI
2344 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2346 * We implement beacon filtering in software since that means we can
2347 * avoid processing the frame here and in cfg80211, and userspace
2348 * will not be able to tell whether the hardware supports it or not.
2350 * XXX: This list needs to be dynamic -- userspace needs to be able to
2351 * add items it requires. It also needs to be able to tell us to
2352 * look out for other vendor IEs.
2354 static const u64 care_about_ies
=
2355 (1ULL << WLAN_EID_COUNTRY
) |
2356 (1ULL << WLAN_EID_ERP_INFO
) |
2357 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2358 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2359 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2360 (1ULL << WLAN_EID_HT_OPERATION
);
2362 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2363 struct ieee80211_mgmt
*mgmt
,
2365 struct ieee80211_rx_status
*rx_status
)
2367 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2368 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2370 struct ieee802_11_elems elems
;
2371 struct ieee80211_local
*local
= sdata
->local
;
2373 bool erp_valid
, directed_tim
= false;
2378 lockdep_assert_held(&ifmgd
->mtx
);
2380 /* Process beacon from the current BSS */
2381 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2385 if (rx_status
->freq
!= local
->oper_channel
->center_freq
)
2388 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2389 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2390 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2391 len
- baselen
, &elems
);
2393 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2395 ifmgd
->assoc_data
->have_beacon
= true;
2396 ifmgd
->assoc_data
->sent_assoc
= false;
2397 /* continue assoc process */
2398 ifmgd
->assoc_data
->timeout
= jiffies
;
2399 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2403 if (!ifmgd
->associated
||
2404 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2406 bssid
= ifmgd
->associated
->bssid
;
2408 /* Track average RSSI from the Beacon frames of the current AP */
2409 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2410 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2411 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2412 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2413 ifmgd
->last_cqm_event_signal
= 0;
2414 ifmgd
->count_beacon_signal
= 1;
2415 ifmgd
->last_ave_beacon_signal
= 0;
2417 ifmgd
->ave_beacon_signal
=
2418 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2419 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2420 ifmgd
->ave_beacon_signal
) / 16;
2421 ifmgd
->count_beacon_signal
++;
2424 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2425 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2426 int sig
= ifmgd
->ave_beacon_signal
;
2427 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2430 * if signal crosses either of the boundaries, invoke callback
2431 * with appropriate parameters
2433 if (sig
> ifmgd
->rssi_max_thold
&&
2434 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2435 ifmgd
->last_ave_beacon_signal
= sig
;
2436 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2437 } else if (sig
< ifmgd
->rssi_min_thold
&&
2438 (last_sig
>= ifmgd
->rssi_max_thold
||
2440 ifmgd
->last_ave_beacon_signal
= sig
;
2441 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2445 if (bss_conf
->cqm_rssi_thold
&&
2446 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2447 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2448 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2449 int last_event
= ifmgd
->last_cqm_event_signal
;
2450 int thold
= bss_conf
->cqm_rssi_thold
;
2451 int hyst
= bss_conf
->cqm_rssi_hyst
;
2453 (last_event
== 0 || sig
< last_event
- hyst
)) {
2454 ifmgd
->last_cqm_event_signal
= sig
;
2455 ieee80211_cqm_rssi_notify(
2457 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2459 } else if (sig
> thold
&&
2460 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2461 ifmgd
->last_cqm_event_signal
= sig
;
2462 ieee80211_cqm_rssi_notify(
2464 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2469 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2470 mlme_dbg_ratelimited(sdata
,
2471 "cancelling probereq poll due to a received beacon\n");
2472 mutex_lock(&local
->mtx
);
2473 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2474 ieee80211_run_deferred_scan(local
);
2475 mutex_unlock(&local
->mtx
);
2477 mutex_lock(&local
->iflist_mtx
);
2478 ieee80211_recalc_ps(local
, -1);
2479 mutex_unlock(&local
->iflist_mtx
);
2483 * Push the beacon loss detection into the future since
2484 * we are processing a beacon from the AP just now.
2486 ieee80211_sta_reset_beacon_monitor(sdata
);
2488 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2489 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2490 len
- baselen
, &elems
,
2491 care_about_ies
, ncrc
);
2493 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2494 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2497 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2499 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2500 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2501 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2502 ieee80211_hw_config(local
,
2503 IEEE80211_CONF_CHANGE_PS
);
2505 ieee80211_send_nullfunc(local
, sdata
, 0);
2506 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2507 local
->pspolling
= true;
2510 * Here is assumed that the driver will be
2511 * able to send ps-poll frame and receive a
2512 * response even though power save mode is
2513 * enabled, but some drivers might require
2514 * to disable power save here. This needs
2515 * to be investigated.
2517 ieee80211_send_pspoll(local
, sdata
);
2522 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2524 ifmgd
->beacon_crc
= ncrc
;
2525 ifmgd
->beacon_crc_valid
= true;
2527 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2530 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2531 elems
.wmm_param_len
))
2532 changed
|= BSS_CHANGED_QOS
;
2534 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2536 erp_value
= elems
.erp_info
[0];
2540 changed
|= ieee80211_handle_bss_capability(sdata
,
2541 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2542 erp_valid
, erp_value
);
2545 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2546 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2547 struct ieee80211_supported_band
*sband
;
2549 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2551 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2555 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2556 mgmt
->u
.probe_resp
.capab_info
&
2557 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2558 ieee80211_handle_pwr_constr(sdata
, local
->oper_channel
,
2560 elems
.country_elem_len
,
2561 elems
.pwr_constr_elem
);
2563 ieee80211_bss_info_change_notify(sdata
, changed
);
2566 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2567 struct sk_buff
*skb
)
2569 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2570 struct ieee80211_rx_status
*rx_status
;
2571 struct ieee80211_mgmt
*mgmt
;
2572 struct cfg80211_bss
*bss
= NULL
;
2573 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2576 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2577 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2578 fc
= le16_to_cpu(mgmt
->frame_control
);
2580 mutex_lock(&ifmgd
->mtx
);
2582 switch (fc
& IEEE80211_FCTL_STYPE
) {
2583 case IEEE80211_STYPE_BEACON
:
2584 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2586 case IEEE80211_STYPE_PROBE_RESP
:
2587 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2589 case IEEE80211_STYPE_AUTH
:
2590 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2592 case IEEE80211_STYPE_DEAUTH
:
2593 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2595 case IEEE80211_STYPE_DISASSOC
:
2596 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2598 case IEEE80211_STYPE_ASSOC_RESP
:
2599 case IEEE80211_STYPE_REASSOC_RESP
:
2600 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2602 case IEEE80211_STYPE_ACTION
:
2603 switch (mgmt
->u
.action
.category
) {
2604 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2605 ieee80211_sta_process_chanswitch(sdata
,
2606 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2607 (void *)ifmgd
->associated
->priv
,
2608 rx_status
->mactime
);
2612 mutex_unlock(&ifmgd
->mtx
);
2618 case RX_MGMT_CFG80211_DEAUTH
:
2619 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2621 case RX_MGMT_CFG80211_DISASSOC
:
2622 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2624 case RX_MGMT_CFG80211_RX_AUTH
:
2625 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2627 case RX_MGMT_CFG80211_RX_ASSOC
:
2628 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2630 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2631 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2634 WARN(1, "unexpected: %d", rma
);
2638 static void ieee80211_sta_timer(unsigned long data
)
2640 struct ieee80211_sub_if_data
*sdata
=
2641 (struct ieee80211_sub_if_data
*) data
;
2642 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2643 struct ieee80211_local
*local
= sdata
->local
;
2645 if (local
->quiescing
) {
2646 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2650 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2653 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2654 u8
*bssid
, u8 reason
)
2656 struct ieee80211_local
*local
= sdata
->local
;
2657 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2658 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2660 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2662 mutex_unlock(&ifmgd
->mtx
);
2665 * must be outside lock due to cfg80211,
2666 * but that's not a problem.
2668 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2670 mutex_lock(&local
->mtx
);
2671 ieee80211_recalc_idle(local
);
2672 mutex_unlock(&local
->mtx
);
2674 mutex_lock(&ifmgd
->mtx
);
2677 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2679 struct ieee80211_local
*local
= sdata
->local
;
2680 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2681 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2683 lockdep_assert_held(&ifmgd
->mtx
);
2685 if (WARN_ON_ONCE(!auth_data
))
2690 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2691 sdata_info(sdata
, "authentication with %pM timed out\n",
2692 auth_data
->bss
->bssid
);
2695 * Most likely AP is not in the range so remove the
2696 * bss struct for that AP.
2698 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2703 drv_mgd_prepare_tx(local
, sdata
);
2705 if (auth_data
->bss
->proberesp_ies
) {
2706 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2707 auth_data
->bss
->bssid
, auth_data
->tries
,
2708 IEEE80211_AUTH_MAX_TRIES
);
2710 auth_data
->expected_transaction
= 2;
2711 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2712 auth_data
->ie
, auth_data
->ie_len
,
2713 auth_data
->bss
->bssid
,
2714 auth_data
->bss
->bssid
, NULL
, 0, 0);
2718 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2719 auth_data
->bss
->bssid
, auth_data
->tries
,
2720 IEEE80211_AUTH_MAX_TRIES
);
2722 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2726 * Direct probe is sent to broadcast address as some APs
2727 * will not answer to direct packet in unassociated state.
2729 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2730 NULL
, 0, (u32
) -1, true, false,
2731 auth_data
->bss
->channel
);
2734 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2735 run_again(ifmgd
, auth_data
->timeout
);
2740 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2742 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2743 struct ieee80211_local
*local
= sdata
->local
;
2745 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2747 assoc_data
->tries
++;
2748 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2749 sdata_info(sdata
, "association with %pM timed out\n",
2750 assoc_data
->bss
->bssid
);
2753 * Most likely AP is not in the range so remove the
2754 * bss struct for that AP.
2756 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2761 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2762 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2763 IEEE80211_ASSOC_MAX_TRIES
);
2764 ieee80211_send_assoc(sdata
);
2766 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2767 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2772 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2774 struct ieee80211_local
*local
= sdata
->local
;
2775 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2777 mutex_lock(&ifmgd
->mtx
);
2779 if (ifmgd
->auth_data
&&
2780 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2781 if (ifmgd
->auth_data
->done
) {
2783 * ok ... we waited for assoc but userspace didn't,
2784 * so let's just kill the auth data
2786 ieee80211_destroy_auth_data(sdata
, false);
2787 } else if (ieee80211_probe_auth(sdata
)) {
2790 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2792 ieee80211_destroy_auth_data(sdata
, false);
2794 mutex_unlock(&ifmgd
->mtx
);
2795 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2796 mutex_lock(&ifmgd
->mtx
);
2798 } else if (ifmgd
->auth_data
)
2799 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2801 if (ifmgd
->assoc_data
&&
2802 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2803 if (!ifmgd
->assoc_data
->have_beacon
||
2804 ieee80211_do_assoc(sdata
)) {
2807 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2809 ieee80211_destroy_assoc_data(sdata
, false);
2811 mutex_unlock(&ifmgd
->mtx
);
2812 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2813 mutex_lock(&ifmgd
->mtx
);
2815 } else if (ifmgd
->assoc_data
)
2816 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2818 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2819 IEEE80211_STA_CONNECTION_POLL
) &&
2820 ifmgd
->associated
) {
2824 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2826 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2827 max_tries
= max_nullfunc_tries
;
2829 max_tries
= max_probe_tries
;
2831 /* ACK received for nullfunc probing frame */
2832 if (!ifmgd
->probe_send_count
)
2833 ieee80211_reset_ap_probe(sdata
);
2834 else if (ifmgd
->nullfunc_failed
) {
2835 if (ifmgd
->probe_send_count
< max_tries
) {
2837 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2838 bssid
, ifmgd
->probe_send_count
,
2840 ieee80211_mgd_probe_ap_send(sdata
);
2843 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2845 ieee80211_sta_connection_lost(sdata
, bssid
,
2846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2848 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2849 run_again(ifmgd
, ifmgd
->probe_timeout
);
2850 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2852 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2853 bssid
, probe_wait_ms
);
2854 ieee80211_sta_connection_lost(sdata
, bssid
,
2855 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2856 } else if (ifmgd
->probe_send_count
< max_tries
) {
2858 "No probe response from AP %pM after %dms, try %d/%i\n",
2859 bssid
, probe_wait_ms
,
2860 ifmgd
->probe_send_count
, max_tries
);
2861 ieee80211_mgd_probe_ap_send(sdata
);
2864 * We actually lost the connection ... or did we?
2867 wiphy_debug(local
->hw
.wiphy
,
2868 "%s: No probe response from AP %pM"
2869 " after %dms, disconnecting.\n",
2871 bssid
, probe_wait_ms
);
2873 ieee80211_sta_connection_lost(sdata
, bssid
,
2874 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2878 mutex_unlock(&ifmgd
->mtx
);
2880 mutex_lock(&local
->mtx
);
2881 ieee80211_recalc_idle(local
);
2882 mutex_unlock(&local
->mtx
);
2885 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2887 struct ieee80211_sub_if_data
*sdata
=
2888 (struct ieee80211_sub_if_data
*) data
;
2889 struct ieee80211_local
*local
= sdata
->local
;
2891 if (local
->quiescing
)
2894 ieee80211_queue_work(&sdata
->local
->hw
,
2895 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2898 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2900 struct ieee80211_sub_if_data
*sdata
=
2901 (struct ieee80211_sub_if_data
*) data
;
2902 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2903 struct ieee80211_local
*local
= sdata
->local
;
2905 if (local
->quiescing
)
2908 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2911 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2913 struct ieee80211_sub_if_data
*sdata
=
2914 container_of(work
, struct ieee80211_sub_if_data
,
2915 u
.mgd
.monitor_work
);
2917 ieee80211_mgd_probe_ap(sdata
, false);
2920 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2924 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2925 __ieee80211_stop_poll(sdata
);
2927 /* let's probe the connection once */
2928 flags
= sdata
->local
->hw
.flags
;
2929 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2930 ieee80211_queue_work(&sdata
->local
->hw
,
2931 &sdata
->u
.mgd
.monitor_work
);
2932 /* and do all the other regular work too */
2933 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2938 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2940 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2943 * we need to use atomic bitops for the running bits
2944 * only because both timers might fire at the same
2945 * time -- the code here is properly synchronised.
2948 cancel_work_sync(&ifmgd
->request_smps_work
);
2950 cancel_work_sync(&ifmgd
->monitor_work
);
2951 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2952 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
2953 if (del_timer_sync(&ifmgd
->timer
))
2954 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2956 cancel_work_sync(&ifmgd
->chswitch_work
);
2957 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2958 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2960 /* these will just be re-established on connection */
2961 del_timer_sync(&ifmgd
->conn_mon_timer
);
2962 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2965 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2967 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2969 if (!ifmgd
->associated
)
2972 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2973 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2974 mutex_lock(&ifmgd
->mtx
);
2975 if (ifmgd
->associated
) {
2977 "driver requested disconnect after resume\n");
2978 ieee80211_sta_connection_lost(sdata
,
2979 ifmgd
->associated
->bssid
,
2980 WLAN_REASON_UNSPECIFIED
);
2981 mutex_unlock(&ifmgd
->mtx
);
2984 mutex_unlock(&ifmgd
->mtx
);
2987 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2988 add_timer(&ifmgd
->timer
);
2989 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2990 add_timer(&ifmgd
->chswitch_timer
);
2991 ieee80211_sta_reset_beacon_monitor(sdata
);
2993 mutex_lock(&sdata
->local
->mtx
);
2994 ieee80211_restart_sta_timer(sdata
);
2995 mutex_unlock(&sdata
->local
->mtx
);
2999 /* interface setup */
3000 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3002 struct ieee80211_if_managed
*ifmgd
;
3004 ifmgd
= &sdata
->u
.mgd
;
3005 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3006 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3007 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3008 ieee80211_beacon_connection_loss_work
);
3009 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3010 ieee80211_csa_connection_drop_work
);
3011 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3012 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3013 (unsigned long) sdata
);
3014 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3015 (unsigned long) sdata
);
3016 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3017 (unsigned long) sdata
);
3018 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3019 (unsigned long) sdata
);
3022 ifmgd
->powersave
= sdata
->wdev
.ps
;
3023 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3024 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3026 mutex_init(&ifmgd
->mtx
);
3028 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3029 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3031 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3034 /* scan finished notification */
3035 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3037 struct ieee80211_sub_if_data
*sdata
;
3039 /* Restart STA timers */
3041 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3042 ieee80211_restart_sta_timer(sdata
);
3046 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3047 unsigned long data
, void *dummy
)
3049 s32 latency_usec
= (s32
) data
;
3050 struct ieee80211_local
*local
=
3051 container_of(nb
, struct ieee80211_local
,
3052 network_latency_notifier
);
3054 mutex_lock(&local
->iflist_mtx
);
3055 ieee80211_recalc_ps(local
, latency_usec
);
3056 mutex_unlock(&local
->iflist_mtx
);
3061 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3062 struct cfg80211_bss
*cbss
)
3064 struct ieee80211_local
*local
= sdata
->local
;
3065 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3067 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3068 const u8
*ht_oper_ie
;
3069 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3070 struct ieee80211_supported_band
*sband
;
3072 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3074 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3076 if (sband
->ht_cap
.ht_supported
) {
3077 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3078 cbss
->information_elements
,
3079 cbss
->len_information_elements
);
3080 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3081 ht_oper
= (void *)(ht_oper_ie
+ 2);
3085 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3086 cbss
->channel
->band
);
3087 /* check that channel matches the right operating channel */
3088 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3090 * It's possible that some APs are confused here;
3091 * Netgear WNDR3700 sometimes reports 4 higher than
3092 * the actual channel in association responses, but
3093 * since we look at probe response/beacon data here
3097 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3098 cbss
->channel
->center_freq
,
3099 ht_cfreq
, ht_oper
->primary_chan
,
3100 cbss
->channel
->band
);
3106 channel_type
= NL80211_CHAN_HT20
;
3108 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3109 switch (ht_oper
->ht_param
&
3110 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3111 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3112 channel_type
= NL80211_CHAN_HT40PLUS
;
3114 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3115 channel_type
= NL80211_CHAN_HT40MINUS
;
3121 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3122 /* can only fail due to HT40+/- mismatch */
3123 channel_type
= NL80211_CHAN_HT20
;
3125 "disabling 40 MHz due to multi-vif mismatch\n");
3126 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3127 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3131 local
->oper_channel
= cbss
->channel
;
3132 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3137 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3138 struct cfg80211_bss
*cbss
, bool assoc
)
3140 struct ieee80211_local
*local
= sdata
->local
;
3141 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3142 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3143 struct sta_info
*new_sta
= NULL
;
3144 bool have_sta
= false;
3147 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3152 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3157 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3162 mutex_lock(&local
->mtx
);
3163 ieee80211_recalc_idle(sdata
->local
);
3164 mutex_unlock(&local
->mtx
);
3167 u32 rates
= 0, basic_rates
= 0;
3168 bool have_higher_than_11mbit
;
3169 int min_rate
= INT_MAX
, min_rate_index
= -1;
3170 struct ieee80211_supported_band
*sband
;
3172 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3174 err
= ieee80211_prep_channel(sdata
, cbss
);
3176 sta_info_free(local
, new_sta
);
3180 ieee80211_get_rates(sband
, bss
->supp_rates
,
3181 bss
->supp_rates_len
,
3182 &rates
, &basic_rates
,
3183 &have_higher_than_11mbit
,
3184 &min_rate
, &min_rate_index
);
3187 * This used to be a workaround for basic rates missing
3188 * in the association response frame. Now that we no
3189 * longer use the basic rates from there, it probably
3190 * doesn't happen any more, but keep the workaround so
3191 * in case some *other* APs are buggy in different ways
3192 * we can connect -- with a warning.
3194 if (!basic_rates
&& min_rate_index
>= 0) {
3196 "No basic rates, using min rate instead\n");
3197 basic_rates
= BIT(min_rate_index
);
3200 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3201 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3203 /* cf. IEEE 802.11 9.2.12 */
3204 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3205 have_higher_than_11mbit
)
3206 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3208 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3210 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3212 /* set timing information */
3213 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3214 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3215 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3217 /* tell driver about BSSID, basic rates and timing */
3218 ieee80211_bss_info_change_notify(sdata
,
3219 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3220 BSS_CHANGED_BEACON_INT
);
3223 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3225 err
= sta_info_insert(new_sta
);
3229 "failed to insert STA entry for the AP (error %d)\n",
3234 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3240 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3241 struct cfg80211_auth_request
*req
)
3243 struct ieee80211_local
*local
= sdata
->local
;
3244 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3245 struct ieee80211_mgd_auth_data
*auth_data
;
3249 /* prepare auth data structure */
3251 switch (req
->auth_type
) {
3252 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3253 auth_alg
= WLAN_AUTH_OPEN
;
3255 case NL80211_AUTHTYPE_SHARED_KEY
:
3256 if (IS_ERR(local
->wep_tx_tfm
))
3258 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3260 case NL80211_AUTHTYPE_FT
:
3261 auth_alg
= WLAN_AUTH_FT
;
3263 case NL80211_AUTHTYPE_NETWORK_EAP
:
3264 auth_alg
= WLAN_AUTH_LEAP
;
3270 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3274 auth_data
->bss
= req
->bss
;
3276 if (req
->ie
&& req
->ie_len
) {
3277 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3278 auth_data
->ie_len
= req
->ie_len
;
3281 if (req
->key
&& req
->key_len
) {
3282 auth_data
->key_len
= req
->key_len
;
3283 auth_data
->key_idx
= req
->key_idx
;
3284 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3287 auth_data
->algorithm
= auth_alg
;
3289 /* try to authenticate/probe */
3291 mutex_lock(&ifmgd
->mtx
);
3293 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3294 ifmgd
->assoc_data
) {
3299 if (ifmgd
->auth_data
)
3300 ieee80211_destroy_auth_data(sdata
, false);
3302 /* prep auth_data so we don't go into idle on disassoc */
3303 ifmgd
->auth_data
= auth_data
;
3305 if (ifmgd
->associated
)
3306 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3308 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3310 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3314 err
= ieee80211_probe_auth(sdata
);
3316 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3320 /* hold our own reference */
3321 cfg80211_ref_bss(auth_data
->bss
);
3326 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3327 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3328 ifmgd
->auth_data
= NULL
;
3332 mutex_unlock(&ifmgd
->mtx
);
3337 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3338 struct cfg80211_assoc_request
*req
)
3340 struct ieee80211_local
*local
= sdata
->local
;
3341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3342 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3343 struct ieee80211_mgd_assoc_data
*assoc_data
;
3344 struct ieee80211_supported_band
*sband
;
3345 const u8
*ssidie
, *ht_ie
;
3348 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3352 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3356 mutex_lock(&ifmgd
->mtx
);
3358 if (ifmgd
->associated
)
3359 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3361 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3366 if (ifmgd
->assoc_data
) {
3371 if (ifmgd
->auth_data
) {
3374 /* keep sta info, bssid if matching */
3375 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3376 ieee80211_destroy_auth_data(sdata
, match
);
3379 /* prepare assoc data */
3382 * keep only the 40 MHz disable bit set as it might have
3383 * been set during authentication already, all other bits
3384 * should be reset for a new connection
3386 ifmgd
->flags
&= IEEE80211_STA_DISABLE_40MHZ
;
3388 ifmgd
->beacon_crc_valid
= false;
3391 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3392 * We still associate in non-HT mode (11a/b/g) if any one of these
3393 * ciphers is configured as pairwise.
3394 * We can set this to true for non-11n hardware, that'll be checked
3395 * separately along with the peer capabilities.
3397 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3398 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3399 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3400 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3401 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3402 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3403 netdev_info(sdata
->dev
,
3404 "disabling HT/VHT due to WEP/TKIP use\n");
3408 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3409 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3410 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3413 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3414 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3415 if (!sband
->ht_cap
.ht_supported
||
3416 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3417 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3419 netdev_info(sdata
->dev
,
3420 "disabling HT as WMM/QoS is not supported by the AP\n");
3423 /* disable VHT if we don't support it or the AP doesn't use WMM */
3424 if (!sband
->vht_cap
.vht_supported
||
3425 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3426 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3428 netdev_info(sdata
->dev
,
3429 "disabling VHT as WMM/QoS is not supported by the AP\n");
3432 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3433 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3434 sizeof(ifmgd
->ht_capa_mask
));
3436 if (req
->ie
&& req
->ie_len
) {
3437 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3438 assoc_data
->ie_len
= req
->ie_len
;
3441 assoc_data
->bss
= req
->bss
;
3443 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3444 if (ifmgd
->powersave
)
3445 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3447 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3449 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3451 assoc_data
->capability
= req
->bss
->capability
;
3452 assoc_data
->wmm
= bss
->wmm_used
&&
3453 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3454 assoc_data
->supp_rates
= bss
->supp_rates
;
3455 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3457 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3458 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3459 assoc_data
->ap_ht_param
=
3460 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3462 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3464 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3465 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3466 assoc_data
->uapsd
= true;
3467 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3469 assoc_data
->uapsd
= false;
3470 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3473 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3474 assoc_data
->ssid_len
= ssidie
[1];
3476 if (req
->prev_bssid
)
3477 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3480 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3481 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3483 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3484 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3487 if (req
->crypto
.control_port
)
3488 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3490 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3492 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3493 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3495 /* kick off associate process */
3497 ifmgd
->assoc_data
= assoc_data
;
3499 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3503 if (!bss
->dtim_period
&&
3504 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3506 * Wait up to one beacon interval ...
3507 * should this be more if we miss one?
3509 sdata_info(sdata
, "waiting for beacon from %pM\n",
3511 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3513 assoc_data
->have_beacon
= true;
3514 assoc_data
->sent_assoc
= false;
3515 assoc_data
->timeout
= jiffies
;
3517 run_again(ifmgd
, assoc_data
->timeout
);
3519 if (bss
->corrupt_data
) {
3520 char *corrupt_type
= "data";
3521 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3522 if (bss
->corrupt_data
&
3523 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3524 corrupt_type
= "beacon and probe response";
3526 corrupt_type
= "beacon";
3527 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3528 corrupt_type
= "probe response";
3529 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3536 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3537 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3538 ifmgd
->assoc_data
= NULL
;
3542 mutex_unlock(&ifmgd
->mtx
);
3547 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3548 struct cfg80211_deauth_request
*req
)
3550 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3551 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3553 mutex_lock(&ifmgd
->mtx
);
3555 if (ifmgd
->auth_data
) {
3556 ieee80211_destroy_auth_data(sdata
, false);
3557 mutex_unlock(&ifmgd
->mtx
);
3562 "deauthenticating from %pM by local choice (reason=%d)\n",
3563 req
->bssid
, req
->reason_code
);
3565 if (ifmgd
->associated
&&
3566 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
3567 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3568 req
->reason_code
, true, frame_buf
);
3570 drv_mgd_prepare_tx(sdata
->local
, sdata
);
3571 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3572 IEEE80211_STYPE_DEAUTH
,
3573 req
->reason_code
, true,
3577 mutex_unlock(&ifmgd
->mtx
);
3579 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
3580 IEEE80211_DEAUTH_FRAME_LEN
);
3582 mutex_lock(&sdata
->local
->mtx
);
3583 ieee80211_recalc_idle(sdata
->local
);
3584 mutex_unlock(&sdata
->local
->mtx
);
3589 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3590 struct cfg80211_disassoc_request
*req
)
3592 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3594 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3596 mutex_lock(&ifmgd
->mtx
);
3599 * cfg80211 should catch this ... but it's racy since
3600 * we can receive a disassoc frame, process it, hand it
3601 * to cfg80211 while that's in a locked section already
3602 * trying to tell us that the user wants to disconnect.
3604 if (ifmgd
->associated
!= req
->bss
) {
3605 mutex_unlock(&ifmgd
->mtx
);
3610 "disassociating from %pM by local choice (reason=%d)\n",
3611 req
->bss
->bssid
, req
->reason_code
);
3613 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3614 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3615 req
->reason_code
, !req
->local_state_change
,
3617 mutex_unlock(&ifmgd
->mtx
);
3619 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
3620 IEEE80211_DEAUTH_FRAME_LEN
);
3622 mutex_lock(&sdata
->local
->mtx
);
3623 ieee80211_recalc_idle(sdata
->local
);
3624 mutex_unlock(&sdata
->local
->mtx
);
3629 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3631 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3633 mutex_lock(&ifmgd
->mtx
);
3634 if (ifmgd
->assoc_data
)
3635 ieee80211_destroy_assoc_data(sdata
, false);
3636 if (ifmgd
->auth_data
)
3637 ieee80211_destroy_auth_data(sdata
, false);
3638 del_timer_sync(&ifmgd
->timer
);
3639 mutex_unlock(&ifmgd
->mtx
);
3642 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3643 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3646 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3648 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3650 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3652 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);