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 ieee80211_chanctx_conf
*chanctx_conf
;
182 struct ieee80211_channel
*chan
;
183 struct sta_info
*sta
;
186 bool disable_40
= false;
189 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
190 if (WARN_ON(!chanctx_conf
)) {
194 chan
= chanctx_conf
->def
.chan
;
196 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
198 switch (sdata
->vif
.bss_conf
.chandef
.width
) {
199 case NL80211_CHAN_WIDTH_40
:
200 if (sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
>
201 sdata
->vif
.bss_conf
.chandef
.center_freq1
&&
202 chan
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
204 if (sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
<
205 sdata
->vif
.bss_conf
.chandef
.center_freq1
&&
206 chan
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
217 mutex_lock(&local
->sta_mtx
);
218 sta
= sta_info_get(sdata
, bssid
);
222 if (sta
&& !sta
->supports_40mhz
)
225 if (sta
&& (!reconfig
||
226 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
227 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
230 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
232 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
234 rate_control_rate_update(local
, sband
, sta
,
235 IEEE80211_RC_BW_CHANGED
);
237 mutex_unlock(&local
->sta_mtx
);
239 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
241 /* if bss configuration changed store the new one */
242 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
243 changed
|= BSS_CHANGED_HT
;
244 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
250 /* frame sending functions */
252 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
253 struct ieee80211_supported_band
*sband
,
259 for (i
= 0; i
< supp_rates_len
; i
++) {
260 int rate
= (supp_rates
[i
] & 0x7F) * 5;
262 for (j
= 0; j
< sband
->n_bitrates
; j
++)
263 if (sband
->bitrates
[j
].bitrate
== rate
) {
273 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
274 struct sk_buff
*skb
, u8 ap_ht_param
,
275 struct ieee80211_supported_band
*sband
,
276 struct ieee80211_channel
*channel
,
277 enum ieee80211_smps_mode smps
)
280 u32 flags
= channel
->flags
;
282 struct ieee80211_sta_ht_cap ht_cap
;
284 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
286 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
287 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
289 /* determine capability flags */
292 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
294 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
295 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
296 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
300 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
301 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
302 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
312 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
313 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
314 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
317 /* set SM PS mode properly */
318 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
320 case IEEE80211_SMPS_AUTOMATIC
:
321 case IEEE80211_SMPS_NUM_MODES
:
323 case IEEE80211_SMPS_OFF
:
324 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
325 IEEE80211_HT_CAP_SM_PS_SHIFT
;
327 case IEEE80211_SMPS_STATIC
:
328 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
329 IEEE80211_HT_CAP_SM_PS_SHIFT
;
331 case IEEE80211_SMPS_DYNAMIC
:
332 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
333 IEEE80211_HT_CAP_SM_PS_SHIFT
;
337 /* reserve and fill IE */
338 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
339 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
342 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
344 struct ieee80211_supported_band
*sband
,
345 struct ieee80211_vht_cap
*ap_vht_cap
)
349 struct ieee80211_sta_vht_cap vht_cap
;
352 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
354 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
356 /* determine capability flags */
359 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
360 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
361 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
364 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
365 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
366 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
370 * Some APs apparently get confused if our capabilities are better
371 * than theirs, so restrict what we advertise in the assoc request.
373 if (!(ap_vht_cap
->vht_cap_info
&
374 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
375 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
377 if (!(ap_vht_cap
->vht_cap_info
&
378 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC
)))
379 cap
&= ~(IEEE80211_VHT_CAP_RXSTBC_1
|
380 IEEE80211_VHT_CAP_RXSTBC_3
|
381 IEEE80211_VHT_CAP_RXSTBC_4
);
383 for (i
= 0; i
< 8; i
++) {
385 u16 mask
= IEEE80211_VHT_MCS_NOT_SUPPORTED
<< shift
;
388 ap_mcs
= (le16_to_cpu(ap_vht_cap
->supp_mcs
.tx_mcs_map
) &
390 our_mcs
= (le16_to_cpu(vht_cap
.vht_mcs
.rx_mcs_map
) &
395 if (our_mcs
<= ap_mcs
)
398 case IEEE80211_VHT_MCS_NOT_SUPPORTED
:
399 vht_cap
.vht_mcs
.rx_mcs_map
&= cpu_to_le16(~mask
);
400 vht_cap
.vht_mcs
.rx_mcs_map
|=
401 cpu_to_le16(ap_mcs
<< shift
);
405 /* reserve and fill IE */
406 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
407 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
410 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
412 struct ieee80211_local
*local
= sdata
->local
;
413 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
414 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
416 struct ieee80211_mgmt
*mgmt
;
418 size_t offset
= 0, noffset
;
419 int i
, count
, rates_len
, supp_rates_len
;
421 struct ieee80211_supported_band
*sband
;
422 struct ieee80211_chanctx_conf
*chanctx_conf
;
423 struct ieee80211_channel
*chan
;
426 lockdep_assert_held(&ifmgd
->mtx
);
429 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
430 if (WARN_ON(!chanctx_conf
)) {
434 chan
= chanctx_conf
->def
.chan
;
436 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
438 if (assoc_data
->supp_rates_len
) {
440 * Get all rates supported by the device and the AP as
441 * some APs don't like getting a superset of their rates
442 * in the association request (e.g. D-Link DAP 1353 in
445 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
446 assoc_data
->supp_rates_len
,
450 * In case AP not provide any supported rates information
451 * before association, we send information element(s) with
452 * all rates that we support.
455 rates_len
= sband
->n_bitrates
;
458 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
459 sizeof(*mgmt
) + /* bit too much but doesn't matter */
460 2 + assoc_data
->ssid_len
+ /* SSID */
461 4 + rates_len
+ /* (extended) rates */
462 4 + /* power capability */
463 2 + 2 * sband
->n_channels
+ /* supported channels */
464 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
465 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
466 assoc_data
->ie_len
+ /* extra IEs */
472 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
474 capab
= WLAN_CAPABILITY_ESS
;
476 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
477 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
478 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
479 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
480 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
483 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
484 capab
|= WLAN_CAPABILITY_PRIVACY
;
486 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
487 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
488 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
490 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
492 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
493 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
494 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
496 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
498 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
499 IEEE80211_STYPE_REASSOC_REQ
);
500 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
501 mgmt
->u
.reassoc_req
.listen_interval
=
502 cpu_to_le16(local
->hw
.conf
.listen_interval
);
503 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
507 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
508 IEEE80211_STYPE_ASSOC_REQ
);
509 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
510 mgmt
->u
.assoc_req
.listen_interval
=
511 cpu_to_le16(local
->hw
.conf
.listen_interval
);
515 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
516 *pos
++ = WLAN_EID_SSID
;
517 *pos
++ = assoc_data
->ssid_len
;
518 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
520 /* add all rates which were marked to be used above */
521 supp_rates_len
= rates_len
;
522 if (supp_rates_len
> 8)
525 pos
= skb_put(skb
, supp_rates_len
+ 2);
526 *pos
++ = WLAN_EID_SUPP_RATES
;
527 *pos
++ = supp_rates_len
;
530 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
531 if (BIT(i
) & rates
) {
532 int rate
= sband
->bitrates
[i
].bitrate
;
533 *pos
++ = (u8
) (rate
/ 5);
539 if (rates_len
> count
) {
540 pos
= skb_put(skb
, rates_len
- count
+ 2);
541 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
542 *pos
++ = rates_len
- count
;
544 for (i
++; i
< sband
->n_bitrates
; i
++) {
545 if (BIT(i
) & rates
) {
546 int rate
= sband
->bitrates
[i
].bitrate
;
547 *pos
++ = (u8
) (rate
/ 5);
552 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
553 /* 1. power capabilities */
554 pos
= skb_put(skb
, 4);
555 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
557 *pos
++ = 0; /* min tx power */
558 *pos
++ = chan
->max_power
; /* max tx power */
560 /* 2. supported channels */
561 /* TODO: get this in reg domain format */
562 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
563 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
564 *pos
++ = 2 * sband
->n_channels
;
565 for (i
= 0; i
< sband
->n_channels
; i
++) {
566 *pos
++ = ieee80211_frequency_to_channel(
567 sband
->channels
[i
].center_freq
);
568 *pos
++ = 1; /* one channel in the subband*/
572 /* if present, add any custom IEs that go before HT */
573 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
574 static const u8 before_ht
[] = {
577 WLAN_EID_EXT_SUPP_RATES
,
578 WLAN_EID_PWR_CAPABILITY
,
579 WLAN_EID_SUPPORTED_CHANNELS
,
582 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
583 WLAN_EID_MOBILITY_DOMAIN
,
584 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
586 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
587 before_ht
, ARRAY_SIZE(before_ht
),
589 pos
= skb_put(skb
, noffset
- offset
);
590 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
594 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
595 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
596 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
598 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
599 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
600 sband
, chan
, sdata
->smps_mode
);
602 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
603 ieee80211_add_vht_ie(sdata
, skb
, sband
,
604 &assoc_data
->ap_vht_cap
);
606 /* if present, add any custom non-vendor IEs that go after HT */
607 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
608 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
611 pos
= skb_put(skb
, noffset
- offset
);
612 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
616 if (assoc_data
->wmm
) {
617 if (assoc_data
->uapsd
) {
618 qos_info
= ifmgd
->uapsd_queues
;
619 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
620 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
625 pos
= skb_put(skb
, 9);
626 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
627 *pos
++ = 7; /* len */
628 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
631 *pos
++ = 2; /* WME */
632 *pos
++ = 0; /* WME info */
633 *pos
++ = 1; /* WME ver */
637 /* add any remaining custom (i.e. vendor specific here) IEs */
638 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
639 noffset
= assoc_data
->ie_len
;
640 pos
= skb_put(skb
, noffset
- offset
);
641 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
644 drv_mgd_prepare_tx(local
, sdata
);
646 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
647 ieee80211_tx_skb(sdata
, skb
);
650 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
651 struct ieee80211_sub_if_data
*sdata
)
653 struct ieee80211_pspoll
*pspoll
;
656 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
660 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
661 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
663 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
664 ieee80211_tx_skb(sdata
, skb
);
667 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
668 struct ieee80211_sub_if_data
*sdata
,
672 struct ieee80211_hdr_3addr
*nullfunc
;
673 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
675 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
679 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
681 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
683 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
684 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
685 IEEE80211_STA_CONNECTION_POLL
))
686 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
688 ieee80211_tx_skb(sdata
, skb
);
691 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
692 struct ieee80211_sub_if_data
*sdata
)
695 struct ieee80211_hdr
*nullfunc
;
698 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
701 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
705 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
707 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
708 memset(nullfunc
, 0, 30);
709 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
710 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
711 nullfunc
->frame_control
= fc
;
712 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
713 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
714 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
715 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
717 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
718 ieee80211_tx_skb(sdata
, skb
);
721 /* spectrum management related things */
722 static void ieee80211_chswitch_work(struct work_struct
*work
)
724 struct ieee80211_sub_if_data
*sdata
=
725 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
726 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
728 if (!ieee80211_sdata_running(sdata
))
731 mutex_lock(&ifmgd
->mtx
);
732 if (!ifmgd
->associated
)
735 sdata
->local
->_oper_channel
= sdata
->local
->csa_channel
;
736 if (!sdata
->local
->ops
->channel_switch
) {
737 /* call "hw_config" only if doing sw channel switch */
738 ieee80211_hw_config(sdata
->local
,
739 IEEE80211_CONF_CHANGE_CHANNEL
);
741 /* update the device channel directly */
742 sdata
->local
->hw
.conf
.channel
= sdata
->local
->_oper_channel
;
745 /* XXX: shouldn't really modify cfg80211-owned data! */
746 ifmgd
->associated
->channel
= sdata
->local
->_oper_channel
;
748 /* XXX: wait for a beacon first? */
749 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
750 IEEE80211_QUEUE_STOP_REASON_CSA
);
752 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
753 mutex_unlock(&ifmgd
->mtx
);
756 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
758 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
759 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
761 trace_api_chswitch_done(sdata
, success
);
764 "driver channel switch failed, disconnecting\n");
765 ieee80211_queue_work(&sdata
->local
->hw
,
766 &ifmgd
->csa_connection_drop_work
);
768 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
771 EXPORT_SYMBOL(ieee80211_chswitch_done
);
773 static void ieee80211_chswitch_timer(unsigned long data
)
775 struct ieee80211_sub_if_data
*sdata
=
776 (struct ieee80211_sub_if_data
*) data
;
777 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
779 if (sdata
->local
->quiescing
) {
780 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
784 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
787 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
788 struct ieee80211_channel_sw_ie
*sw_elem
,
789 struct ieee80211_bss
*bss
,
792 struct cfg80211_bss
*cbss
=
793 container_of((void *)bss
, struct cfg80211_bss
, priv
);
794 struct ieee80211_channel
*new_ch
;
795 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
796 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
797 cbss
->channel
->band
);
798 struct ieee80211_chanctx
*chanctx
;
800 ASSERT_MGD_MTX(ifmgd
);
802 if (!ifmgd
->associated
)
805 if (sdata
->local
->scanning
)
808 /* Disregard subsequent beacons if we are already running a timer
811 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
814 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
815 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
817 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
818 ifmgd
->associated
->bssid
, new_freq
);
819 ieee80211_queue_work(&sdata
->local
->hw
,
820 &ifmgd
->csa_connection_drop_work
);
824 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
826 if (sdata
->local
->use_chanctx
) {
828 "not handling channel switch with channel contexts\n");
829 ieee80211_queue_work(&sdata
->local
->hw
,
830 &ifmgd
->csa_connection_drop_work
);
834 mutex_lock(&sdata
->local
->chanctx_mtx
);
835 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
836 mutex_unlock(&sdata
->local
->chanctx_mtx
);
839 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
840 struct ieee80211_chanctx
, conf
);
841 if (chanctx
->refcount
> 1) {
843 "channel switch with multiple interfaces on the same channel, disconnecting\n");
844 ieee80211_queue_work(&sdata
->local
->hw
,
845 &ifmgd
->csa_connection_drop_work
);
846 mutex_unlock(&sdata
->local
->chanctx_mtx
);
849 mutex_unlock(&sdata
->local
->chanctx_mtx
);
851 sdata
->local
->csa_channel
= new_ch
;
854 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
855 IEEE80211_QUEUE_STOP_REASON_CSA
);
857 if (sdata
->local
->ops
->channel_switch
) {
858 /* use driver's channel switch callback */
859 struct ieee80211_channel_switch ch_switch
= {
860 .timestamp
= timestamp
,
861 .block_tx
= sw_elem
->mode
,
863 .count
= sw_elem
->count
,
866 drv_channel_switch(sdata
->local
, &ch_switch
);
870 /* channel switch handled in software */
871 if (sw_elem
->count
<= 1)
872 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
874 mod_timer(&ifmgd
->chswitch_timer
,
875 TU_TO_EXP_TIME(sw_elem
->count
*
876 cbss
->beacon_interval
));
879 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
880 struct ieee80211_channel
*channel
,
881 const u8
*country_ie
, u8 country_ie_len
,
882 const u8
*pwr_constr_elem
)
884 struct ieee80211_country_ie_triplet
*triplet
;
885 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
886 int i
, chan_pwr
, chan_increment
, new_ap_level
;
887 bool have_chan_pwr
= false;
890 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
893 triplet
= (void *)(country_ie
+ 3);
896 switch (channel
->band
) {
900 case IEEE80211_BAND_2GHZ
:
901 case IEEE80211_BAND_60GHZ
:
904 case IEEE80211_BAND_5GHZ
:
910 while (country_ie_len
>= 3) {
911 u8 first_channel
= triplet
->chans
.first_channel
;
913 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
916 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
917 if (first_channel
+ i
* chan_increment
== chan
) {
918 have_chan_pwr
= true;
919 chan_pwr
= triplet
->chans
.max_power
;
934 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
936 if (sdata
->ap_power_level
== new_ap_level
)
940 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
941 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
943 sdata
->ap_power_level
= new_ap_level
;
944 if (__ieee80211_recalc_txpower(sdata
))
945 return BSS_CHANGED_TXPOWER
;
949 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
951 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
952 struct ieee80211_local
*local
= sdata
->local
;
953 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
955 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
956 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
957 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
959 local
->disable_dynamic_ps
= false;
960 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
962 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
964 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
966 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
967 struct ieee80211_local
*local
= sdata
->local
;
968 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
970 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
971 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
972 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
974 local
->disable_dynamic_ps
= true;
975 conf
->dynamic_ps_timeout
= 0;
976 del_timer_sync(&local
->dynamic_ps_timer
);
977 ieee80211_queue_work(&local
->hw
,
978 &local
->dynamic_ps_enable_work
);
980 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
983 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
984 struct ieee80211_sub_if_data
*sdata
)
986 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
989 * If we are scanning right now then the parameters will
990 * take effect when scan finishes.
995 if (conf
->dynamic_ps_timeout
> 0 &&
996 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
997 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
998 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1000 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1001 ieee80211_send_nullfunc(local
, sdata
, 1);
1003 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1004 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1007 conf
->flags
|= IEEE80211_CONF_PS
;
1008 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1012 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1014 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1016 if (local
->ps_sdata
) {
1017 ieee80211_enable_ps(local
, local
->ps_sdata
);
1018 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1019 conf
->flags
&= ~IEEE80211_CONF_PS
;
1020 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1021 del_timer_sync(&local
->dynamic_ps_timer
);
1022 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1026 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1028 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1029 struct sta_info
*sta
= NULL
;
1030 bool authorized
= false;
1032 if (!mgd
->powersave
)
1038 if (!mgd
->associated
)
1041 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1042 IEEE80211_STA_CONNECTION_POLL
))
1046 sta
= sta_info_get(sdata
, mgd
->bssid
);
1048 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1054 /* need to hold RTNL or interface lock */
1055 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1057 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1061 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1062 local
->ps_sdata
= NULL
;
1066 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1067 if (!ieee80211_sdata_running(sdata
))
1069 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1070 /* If an AP vif is found, then disable PS
1071 * by setting the count to zero thereby setting
1077 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1083 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1084 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1088 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1090 beaconint_us
= ieee80211_tu_to_usec(
1091 found
->vif
.bss_conf
.beacon_int
);
1093 timeout
= local
->dynamic_ps_forced_timeout
;
1096 * Go to full PSM if the user configures a very low
1097 * latency requirement.
1098 * The 2000 second value is there for compatibility
1099 * until the PM_QOS_NETWORK_LATENCY is configured
1102 if (latency
> (1900 * USEC_PER_MSEC
) &&
1103 latency
!= (2000 * USEC_PER_SEC
))
1108 local
->dynamic_ps_user_timeout
= timeout
;
1109 if (!local
->disable_dynamic_ps
)
1110 conf
->dynamic_ps_timeout
=
1111 local
->dynamic_ps_user_timeout
;
1113 if (beaconint_us
> latency
) {
1114 local
->ps_sdata
= NULL
;
1117 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1119 /* If the TIM IE is invalid, pretend the value is 1 */
1122 else if (dtimper
> 1)
1123 maxslp
= min_t(int, dtimper
,
1124 latency
/ beaconint_us
);
1126 local
->hw
.conf
.max_sleep_period
= maxslp
;
1127 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1128 local
->ps_sdata
= found
;
1131 local
->ps_sdata
= NULL
;
1134 ieee80211_change_ps(local
);
1137 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1139 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1141 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1142 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1143 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1147 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1149 struct ieee80211_local
*local
=
1150 container_of(work
, struct ieee80211_local
,
1151 dynamic_ps_disable_work
);
1153 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1154 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1155 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1158 ieee80211_wake_queues_by_reason(&local
->hw
,
1159 IEEE80211_QUEUE_STOP_REASON_PS
);
1162 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1164 struct ieee80211_local
*local
=
1165 container_of(work
, struct ieee80211_local
,
1166 dynamic_ps_enable_work
);
1167 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1168 struct ieee80211_if_managed
*ifmgd
;
1169 unsigned long flags
;
1172 /* can only happen when PS was just disabled anyway */
1176 ifmgd
= &sdata
->u
.mgd
;
1178 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1181 if (!local
->disable_dynamic_ps
&&
1182 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1183 /* don't enter PS if TX frames are pending */
1184 if (drv_tx_frames_pending(local
)) {
1185 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1187 local
->hw
.conf
.dynamic_ps_timeout
));
1192 * transmission can be stopped by others which leads to
1193 * dynamic_ps_timer expiry. Postpone the ps timer if it
1194 * is not the actual idle state.
1196 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1197 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1198 if (local
->queue_stop_reasons
[q
]) {
1199 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1201 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1203 local
->hw
.conf
.dynamic_ps_timeout
));
1207 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1210 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1211 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1212 netif_tx_stop_all_queues(sdata
->dev
);
1214 if (drv_tx_frames_pending(local
))
1215 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1217 local
->hw
.conf
.dynamic_ps_timeout
));
1219 ieee80211_send_nullfunc(local
, sdata
, 1);
1220 /* Flush to get the tx status of nullfunc frame */
1221 drv_flush(local
, false);
1225 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1226 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1227 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1228 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1229 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1230 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1233 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1234 netif_tx_wake_all_queues(sdata
->dev
);
1237 void ieee80211_dynamic_ps_timer(unsigned long data
)
1239 struct ieee80211_local
*local
= (void *) data
;
1241 if (local
->quiescing
|| local
->suspended
)
1244 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1248 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1249 struct ieee80211_sub_if_data
*sdata
,
1250 u8
*wmm_param
, size_t wmm_param_len
)
1252 struct ieee80211_tx_queue_params params
;
1253 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1256 u8
*pos
, uapsd_queues
= 0;
1258 if (!local
->ops
->conf_tx
)
1261 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1267 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1270 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1271 uapsd_queues
= ifmgd
->uapsd_queues
;
1273 count
= wmm_param
[6] & 0x0f;
1274 if (count
== ifmgd
->wmm_last_param_set
)
1276 ifmgd
->wmm_last_param_set
= count
;
1278 pos
= wmm_param
+ 8;
1279 left
= wmm_param_len
- 8;
1281 memset(¶ms
, 0, sizeof(params
));
1284 for (; left
>= 4; left
-= 4, pos
+= 4) {
1285 int aci
= (pos
[0] >> 5) & 0x03;
1286 int acm
= (pos
[0] >> 4) & 0x01;
1294 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1295 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1301 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1302 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1308 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1309 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1316 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1317 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1322 params
.aifs
= pos
[0] & 0x0f;
1323 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1324 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1325 params
.txop
= get_unaligned_le16(pos
+ 2);
1326 params
.uapsd
= uapsd
;
1329 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1331 params
.aifs
, params
.cw_min
, params
.cw_max
,
1332 params
.txop
, params
.uapsd
);
1333 sdata
->tx_conf
[queue
] = params
;
1334 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1336 "failed to set TX queue parameters for queue %d\n",
1340 /* enable WMM or activate new settings */
1341 sdata
->vif
.bss_conf
.qos
= true;
1345 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1347 lockdep_assert_held(&sdata
->local
->mtx
);
1349 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1350 IEEE80211_STA_BEACON_POLL
);
1351 ieee80211_run_deferred_scan(sdata
->local
);
1354 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1356 mutex_lock(&sdata
->local
->mtx
);
1357 __ieee80211_stop_poll(sdata
);
1358 mutex_unlock(&sdata
->local
->mtx
);
1361 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1362 u16 capab
, bool erp_valid
, u8 erp
)
1364 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1366 bool use_protection
;
1367 bool use_short_preamble
;
1368 bool use_short_slot
;
1371 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1372 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1374 use_protection
= false;
1375 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1378 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1379 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1380 use_short_slot
= true;
1382 if (use_protection
!= bss_conf
->use_cts_prot
) {
1383 bss_conf
->use_cts_prot
= use_protection
;
1384 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1387 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1388 bss_conf
->use_short_preamble
= use_short_preamble
;
1389 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1392 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1393 bss_conf
->use_short_slot
= use_short_slot
;
1394 changed
|= BSS_CHANGED_ERP_SLOT
;
1400 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1401 struct cfg80211_bss
*cbss
,
1402 u32 bss_info_changed
)
1404 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1405 struct ieee80211_local
*local
= sdata
->local
;
1406 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1408 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1409 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1410 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1412 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1413 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1415 sdata
->u
.mgd
.associated
= cbss
;
1416 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1418 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1420 if (sdata
->vif
.p2p
) {
1421 const struct cfg80211_bss_ies
*ies
;
1424 ies
= rcu_dereference(cbss
->ies
);
1429 ret
= cfg80211_get_p2p_attr(
1430 ies
->data
, ies
->len
,
1431 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1434 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
1435 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
1436 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1437 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
1443 /* just to be sure */
1444 ieee80211_stop_poll(sdata
);
1446 ieee80211_led_assoc(local
, 1);
1448 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
1450 * If the AP is buggy we may get here with no DTIM period
1451 * known, so assume it's 1 which is the only safe assumption
1452 * in that case, although if the TIM IE is broken powersave
1453 * probably just won't work at all.
1455 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1457 bss_conf
->dtim_period
= 0;
1460 bss_conf
->assoc
= 1;
1462 /* Tell the driver to monitor connection quality (if supported) */
1463 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1464 bss_conf
->cqm_rssi_thold
)
1465 bss_info_changed
|= BSS_CHANGED_CQM
;
1467 /* Enable ARP filtering */
1468 if (bss_conf
->arp_addr_cnt
)
1469 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1471 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1473 mutex_lock(&local
->iflist_mtx
);
1474 ieee80211_recalc_ps(local
, -1);
1475 mutex_unlock(&local
->iflist_mtx
);
1477 ieee80211_recalc_smps(sdata
);
1478 ieee80211_recalc_ps_vif(sdata
);
1480 netif_tx_start_all_queues(sdata
->dev
);
1481 netif_carrier_on(sdata
->dev
);
1484 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1485 u16 stype
, u16 reason
, bool tx
,
1488 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1489 struct ieee80211_local
*local
= sdata
->local
;
1492 ASSERT_MGD_MTX(ifmgd
);
1494 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1497 if (WARN_ON(!ifmgd
->associated
))
1500 ieee80211_stop_poll(sdata
);
1502 ifmgd
->associated
= NULL
;
1505 * we need to commit the associated = NULL change because the
1506 * scan code uses that to determine whether this iface should
1507 * go to/wake up from powersave or not -- and could otherwise
1508 * wake the queues erroneously.
1513 * Thus, we can only afterwards stop the queues -- to account
1514 * for the case where another CPU is finishing a scan at this
1515 * time -- we don't want the scan code to enable queues.
1518 netif_tx_stop_all_queues(sdata
->dev
);
1519 netif_carrier_off(sdata
->dev
);
1522 * if we want to get out of ps before disassoc (why?) we have
1523 * to do it before sending disassoc, as otherwise the null-packet
1526 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1527 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1528 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1530 local
->ps_sdata
= NULL
;
1532 /* disable per-vif ps */
1533 ieee80211_recalc_ps_vif(sdata
);
1535 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1537 drv_flush(local
, false);
1539 /* deauthenticate/disassociate now */
1540 if (tx
|| frame_buf
)
1541 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1542 reason
, tx
, frame_buf
);
1544 /* flush out frame */
1546 drv_flush(local
, false);
1548 /* clear bssid only after building the needed mgmt frames */
1549 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1551 /* remove AP and TDLS peers */
1552 sta_info_flush_defer(sdata
);
1554 /* finally reset all BSS / config parameters */
1555 changed
|= ieee80211_reset_erp_info(sdata
);
1557 ieee80211_led_assoc(local
, 0);
1558 changed
|= BSS_CHANGED_ASSOC
;
1559 sdata
->vif
.bss_conf
.assoc
= false;
1561 sdata
->vif
.bss_conf
.p2p_ctwindow
= 0;
1562 sdata
->vif
.bss_conf
.p2p_oppps
= false;
1564 /* on the next assoc, re-program HT parameters */
1565 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1566 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1568 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1570 del_timer_sync(&local
->dynamic_ps_timer
);
1571 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1573 /* Disable ARP filtering */
1574 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1575 changed
|= BSS_CHANGED_ARP_FILTER
;
1577 sdata
->vif
.bss_conf
.qos
= false;
1578 changed
|= BSS_CHANGED_QOS
;
1580 /* The BSSID (not really interesting) and HT changed */
1581 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1582 ieee80211_bss_info_change_notify(sdata
, changed
);
1584 /* disassociated - set to defaults now */
1585 ieee80211_set_wmm_default(sdata
, false);
1587 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1588 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1589 del_timer_sync(&sdata
->u
.mgd
.timer
);
1590 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1592 sdata
->u
.mgd
.timers_running
= 0;
1594 sdata
->vif
.bss_conf
.dtim_period
= 0;
1597 ieee80211_vif_release_channel(sdata
);
1600 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1601 struct ieee80211_hdr
*hdr
)
1604 * We can postpone the mgd.timer whenever receiving unicast frames
1605 * from AP because we know that the connection is working both ways
1606 * at that time. But multicast frames (and hence also beacons) must
1607 * be ignored here, because we need to trigger the timer during
1608 * data idle periods for sending the periodic probe request to the
1609 * AP we're connected to.
1611 if (is_multicast_ether_addr(hdr
->addr1
))
1614 ieee80211_sta_reset_conn_monitor(sdata
);
1617 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1619 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1620 struct ieee80211_local
*local
= sdata
->local
;
1622 mutex_lock(&local
->mtx
);
1623 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1624 IEEE80211_STA_CONNECTION_POLL
))) {
1625 mutex_unlock(&local
->mtx
);
1629 __ieee80211_stop_poll(sdata
);
1631 mutex_lock(&local
->iflist_mtx
);
1632 ieee80211_recalc_ps(local
, -1);
1633 mutex_unlock(&local
->iflist_mtx
);
1635 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1639 * We've received a probe response, but are not sure whether
1640 * we have or will be receiving any beacons or data, so let's
1641 * schedule the timers again, just in case.
1643 ieee80211_sta_reset_beacon_monitor(sdata
);
1645 mod_timer(&ifmgd
->conn_mon_timer
,
1646 round_jiffies_up(jiffies
+
1647 IEEE80211_CONNECTION_IDLE_TIME
));
1649 mutex_unlock(&local
->mtx
);
1652 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1653 struct ieee80211_hdr
*hdr
, bool ack
)
1655 if (!ieee80211_is_data(hdr
->frame_control
))
1659 ieee80211_sta_reset_conn_monitor(sdata
);
1661 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1662 sdata
->u
.mgd
.probe_send_count
> 0) {
1664 sdata
->u
.mgd
.probe_send_count
= 0;
1666 sdata
->u
.mgd
.nullfunc_failed
= true;
1667 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1671 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1673 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1675 u8
*dst
= ifmgd
->associated
->bssid
;
1676 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1679 * Try sending broadcast probe requests for the last three
1680 * probe requests after the first ones failed since some
1681 * buggy APs only support broadcast probe requests.
1683 if (ifmgd
->probe_send_count
>= unicast_limit
)
1687 * When the hardware reports an accurate Tx ACK status, it's
1688 * better to send a nullfunc frame instead of a probe request,
1689 * as it will kick us off the AP quickly if we aren't associated
1690 * anymore. The timeout will be reset if the frame is ACKed by
1693 ifmgd
->probe_send_count
++;
1695 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1696 ifmgd
->nullfunc_failed
= false;
1697 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1702 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1703 if (WARN_ON_ONCE(ssid
== NULL
))
1708 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1709 0, (u32
) -1, true, false,
1710 ifmgd
->associated
->channel
, false);
1714 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1715 run_again(ifmgd
, ifmgd
->probe_timeout
);
1716 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1717 drv_flush(sdata
->local
, false);
1720 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1723 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1724 bool already
= false;
1726 if (!ieee80211_sdata_running(sdata
))
1729 mutex_lock(&ifmgd
->mtx
);
1731 if (!ifmgd
->associated
)
1734 mutex_lock(&sdata
->local
->mtx
);
1736 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1737 mutex_unlock(&sdata
->local
->mtx
);
1742 mlme_dbg_ratelimited(sdata
,
1743 "detected beacon loss from AP - sending probe request\n");
1745 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1746 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1749 * The driver/our work has already reported this event or the
1750 * connection monitoring has kicked in and we have already sent
1751 * a probe request. Or maybe the AP died and the driver keeps
1752 * reporting until we disassociate...
1754 * In either case we have to ignore the current call to this
1755 * function (except for setting the correct probe reason bit)
1756 * because otherwise we would reset the timer every time and
1757 * never check whether we received a probe response!
1759 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1760 IEEE80211_STA_CONNECTION_POLL
))
1764 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1766 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1768 mutex_unlock(&sdata
->local
->mtx
);
1773 mutex_lock(&sdata
->local
->iflist_mtx
);
1774 ieee80211_recalc_ps(sdata
->local
, -1);
1775 mutex_unlock(&sdata
->local
->iflist_mtx
);
1777 ifmgd
->probe_send_count
= 0;
1778 ieee80211_mgd_probe_ap_send(sdata
);
1780 mutex_unlock(&ifmgd
->mtx
);
1783 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1784 struct ieee80211_vif
*vif
)
1786 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1787 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1788 struct cfg80211_bss
*cbss
;
1789 struct sk_buff
*skb
;
1793 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1796 ASSERT_MGD_MTX(ifmgd
);
1798 if (ifmgd
->associated
)
1799 cbss
= ifmgd
->associated
;
1800 else if (ifmgd
->auth_data
)
1801 cbss
= ifmgd
->auth_data
->bss
;
1802 else if (ifmgd
->assoc_data
)
1803 cbss
= ifmgd
->assoc_data
->bss
;
1808 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1809 if (WARN_ON_ONCE(ssid
== NULL
))
1814 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1815 (u32
) -1, cbss
->channel
,
1822 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1824 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
,
1825 bool transmit_frame
)
1827 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1828 struct ieee80211_local
*local
= sdata
->local
;
1829 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1831 mutex_lock(&ifmgd
->mtx
);
1832 if (!ifmgd
->associated
) {
1833 mutex_unlock(&ifmgd
->mtx
);
1837 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1838 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1839 transmit_frame
, frame_buf
);
1840 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1841 mutex_unlock(&ifmgd
->mtx
);
1844 * must be outside lock due to cfg80211,
1845 * but that's not a problem.
1847 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1849 mutex_lock(&local
->mtx
);
1850 ieee80211_recalc_idle(local
);
1851 mutex_unlock(&local
->mtx
);
1854 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1856 struct ieee80211_sub_if_data
*sdata
=
1857 container_of(work
, struct ieee80211_sub_if_data
,
1858 u
.mgd
.beacon_connection_loss_work
);
1859 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1860 struct sta_info
*sta
;
1862 if (ifmgd
->associated
) {
1864 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1866 sta
->beacon_loss_count
++;
1870 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
) {
1871 sdata_info(sdata
, "Connection to AP %pM lost\n",
1873 __ieee80211_disconnect(sdata
, false);
1875 ieee80211_mgd_probe_ap(sdata
, true);
1879 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1881 struct ieee80211_sub_if_data
*sdata
=
1882 container_of(work
, struct ieee80211_sub_if_data
,
1883 u
.mgd
.csa_connection_drop_work
);
1885 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1886 IEEE80211_QUEUE_STOP_REASON_CSA
);
1887 __ieee80211_disconnect(sdata
, true);
1890 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1892 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1893 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1895 trace_api_beacon_loss(sdata
);
1897 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1898 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1900 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1902 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1904 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1905 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1907 trace_api_connection_loss(sdata
);
1909 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1910 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1912 EXPORT_SYMBOL(ieee80211_connection_loss
);
1915 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1918 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1920 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1923 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1925 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1926 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1927 sdata
->u
.mgd
.flags
= 0;
1928 ieee80211_vif_release_channel(sdata
);
1931 cfg80211_put_bss(auth_data
->bss
);
1933 sdata
->u
.mgd
.auth_data
= NULL
;
1936 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1937 struct ieee80211_mgmt
*mgmt
, size_t len
)
1939 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1941 struct ieee802_11_elems elems
;
1943 pos
= mgmt
->u
.auth
.variable
;
1944 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1945 if (!elems
.challenge
)
1947 auth_data
->expected_transaction
= 4;
1948 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1949 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
1950 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1951 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1952 auth_data
->key
, auth_data
->key_len
,
1953 auth_data
->key_idx
);
1956 static enum rx_mgmt_action __must_check
1957 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1958 struct ieee80211_mgmt
*mgmt
, size_t len
)
1960 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1962 u16 auth_alg
, auth_transaction
, status_code
;
1963 struct sta_info
*sta
;
1965 lockdep_assert_held(&ifmgd
->mtx
);
1968 return RX_MGMT_NONE
;
1970 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1971 return RX_MGMT_NONE
;
1973 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1975 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1976 return RX_MGMT_NONE
;
1978 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1979 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1980 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1982 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1983 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
1984 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1985 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
1987 ifmgd
->auth_data
->expected_transaction
);
1988 return RX_MGMT_NONE
;
1991 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1992 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1993 mgmt
->sa
, status_code
);
1994 ieee80211_destroy_auth_data(sdata
, false);
1995 return RX_MGMT_CFG80211_RX_AUTH
;
1998 switch (ifmgd
->auth_data
->algorithm
) {
1999 case WLAN_AUTH_OPEN
:
2000 case WLAN_AUTH_LEAP
:
2004 case WLAN_AUTH_SHARED_KEY
:
2005 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2006 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2007 /* need another frame */
2008 return RX_MGMT_NONE
;
2012 WARN_ONCE(1, "invalid auth alg %d",
2013 ifmgd
->auth_data
->algorithm
);
2014 return RX_MGMT_NONE
;
2017 sdata_info(sdata
, "authenticated\n");
2018 ifmgd
->auth_data
->done
= true;
2019 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2020 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2022 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2023 ifmgd
->auth_data
->expected_transaction
!= 2) {
2025 * Report auth frame to user space for processing since another
2026 * round of Authentication frames is still needed.
2028 return RX_MGMT_CFG80211_RX_AUTH
;
2031 /* move station state to auth */
2032 mutex_lock(&sdata
->local
->sta_mtx
);
2033 sta
= sta_info_get(sdata
, bssid
);
2035 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2038 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2039 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2042 mutex_unlock(&sdata
->local
->sta_mtx
);
2044 return RX_MGMT_CFG80211_RX_AUTH
;
2046 mutex_unlock(&sdata
->local
->sta_mtx
);
2047 /* ignore frame -- wait for timeout */
2048 return RX_MGMT_NONE
;
2052 static enum rx_mgmt_action __must_check
2053 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2054 struct ieee80211_mgmt
*mgmt
, size_t len
)
2056 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2057 const u8
*bssid
= NULL
;
2060 lockdep_assert_held(&ifmgd
->mtx
);
2063 return RX_MGMT_NONE
;
2065 if (!ifmgd
->associated
||
2066 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2067 return RX_MGMT_NONE
;
2069 bssid
= ifmgd
->associated
->bssid
;
2071 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2073 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2074 bssid
, reason_code
);
2076 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2078 mutex_lock(&sdata
->local
->mtx
);
2079 ieee80211_recalc_idle(sdata
->local
);
2080 mutex_unlock(&sdata
->local
->mtx
);
2082 return RX_MGMT_CFG80211_DEAUTH
;
2086 static enum rx_mgmt_action __must_check
2087 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2088 struct ieee80211_mgmt
*mgmt
, size_t len
)
2090 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2093 lockdep_assert_held(&ifmgd
->mtx
);
2096 return RX_MGMT_NONE
;
2098 if (!ifmgd
->associated
||
2099 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2100 return RX_MGMT_NONE
;
2102 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2104 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2105 mgmt
->sa
, reason_code
);
2107 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2109 mutex_lock(&sdata
->local
->mtx
);
2110 ieee80211_recalc_idle(sdata
->local
);
2111 mutex_unlock(&sdata
->local
->mtx
);
2113 return RX_MGMT_CFG80211_DISASSOC
;
2116 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2117 u8
*supp_rates
, unsigned int supp_rates_len
,
2118 u32
*rates
, u32
*basic_rates
,
2119 bool *have_higher_than_11mbit
,
2120 int *min_rate
, int *min_rate_index
)
2124 for (i
= 0; i
< supp_rates_len
; i
++) {
2125 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2126 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2129 *have_higher_than_11mbit
= true;
2132 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2133 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2135 * Note: Even through the membership selector and the basic
2136 * rate flag share the same bit, they are not exactly
2139 if (!!(supp_rates
[i
] & 0x80) &&
2140 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2143 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2144 if (sband
->bitrates
[j
].bitrate
== rate
) {
2147 *basic_rates
|= BIT(j
);
2148 if (rate
< *min_rate
) {
2150 *min_rate_index
= j
;
2158 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2161 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2163 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2166 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2168 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2169 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2170 sdata
->u
.mgd
.flags
= 0;
2171 ieee80211_vif_release_channel(sdata
);
2175 sdata
->u
.mgd
.assoc_data
= NULL
;
2178 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2179 struct cfg80211_bss
*cbss
,
2180 struct ieee80211_mgmt
*mgmt
, size_t len
)
2182 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2183 struct ieee80211_local
*local
= sdata
->local
;
2184 struct ieee80211_supported_band
*sband
;
2185 struct sta_info
*sta
;
2187 u16 capab_info
, aid
;
2188 struct ieee802_11_elems elems
;
2189 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2193 /* AssocResp and ReassocResp have identical structure */
2195 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2196 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2198 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2199 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2201 aid
&= ~(BIT(15) | BIT(14));
2203 ifmgd
->broken_ap
= false;
2205 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2206 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2209 ifmgd
->broken_ap
= true;
2212 pos
= mgmt
->u
.assoc_resp
.variable
;
2213 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2215 if (!elems
.supp_rates
) {
2216 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2222 mutex_lock(&sdata
->local
->sta_mtx
);
2224 * station info was already allocated and inserted before
2225 * the association and should be available to us
2227 sta
= sta_info_get(sdata
, cbss
->bssid
);
2228 if (WARN_ON(!sta
)) {
2229 mutex_unlock(&sdata
->local
->sta_mtx
);
2233 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2235 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2236 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2237 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2239 sta
->supports_40mhz
=
2240 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2242 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2243 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2247 rate_control_rate_init(sta
);
2249 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2250 set_sta_flag(sta
, WLAN_STA_MFP
);
2252 if (elems
.wmm_param
)
2253 set_sta_flag(sta
, WLAN_STA_WME
);
2255 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2257 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2258 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2259 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2262 "failed to move station %pM to desired state\n",
2264 WARN_ON(__sta_info_destroy(sta
));
2265 mutex_unlock(&sdata
->local
->sta_mtx
);
2269 mutex_unlock(&sdata
->local
->sta_mtx
);
2272 * Always handle WMM once after association regardless
2273 * of the first value the AP uses. Setting -1 here has
2274 * that effect because the AP values is an unsigned
2277 ifmgd
->wmm_last_param_set
= -1;
2279 if (elems
.wmm_param
)
2280 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2281 elems
.wmm_param_len
);
2283 ieee80211_set_wmm_default(sdata
, false);
2284 changed
|= BSS_CHANGED_QOS
;
2286 if (elems
.ht_operation
&& elems
.wmm_param
&&
2287 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2288 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2289 cbss
->bssid
, false);
2291 /* set AID and assoc capability,
2292 * ieee80211_set_associated() will tell the driver */
2293 bss_conf
->aid
= aid
;
2294 bss_conf
->assoc_capability
= capab_info
;
2295 ieee80211_set_associated(sdata
, cbss
, changed
);
2298 * If we're using 4-addr mode, let the AP know that we're
2299 * doing so, so that it can create the STA VLAN on its side
2301 if (ifmgd
->use_4addr
)
2302 ieee80211_send_4addr_nullfunc(local
, sdata
);
2305 * Start timer to probe the connection to the AP now.
2306 * Also start the timer that will detect beacon loss.
2308 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2309 ieee80211_sta_reset_beacon_monitor(sdata
);
2314 static enum rx_mgmt_action __must_check
2315 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2316 struct ieee80211_mgmt
*mgmt
, size_t len
,
2317 struct cfg80211_bss
**bss
)
2319 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2320 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2321 u16 capab_info
, status_code
, aid
;
2322 struct ieee802_11_elems elems
;
2326 lockdep_assert_held(&ifmgd
->mtx
);
2329 return RX_MGMT_NONE
;
2330 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2331 return RX_MGMT_NONE
;
2334 * AssocResp and ReassocResp have identical structure, so process both
2335 * of them in this function.
2339 return RX_MGMT_NONE
;
2341 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2342 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2343 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2344 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2347 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2348 reassoc
? "Rea" : "A", mgmt
->sa
,
2349 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2351 pos
= mgmt
->u
.assoc_resp
.variable
;
2352 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2354 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2355 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2356 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2358 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2359 ms
= tu
* 1024 / 1000;
2361 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2363 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2364 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2365 run_again(ifmgd
, assoc_data
->timeout
);
2366 return RX_MGMT_NONE
;
2369 *bss
= assoc_data
->bss
;
2371 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2372 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2373 mgmt
->sa
, status_code
);
2374 ieee80211_destroy_assoc_data(sdata
, false);
2376 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2377 /* oops -- internal error -- send timeout for now */
2378 ieee80211_destroy_assoc_data(sdata
, false);
2379 cfg80211_put_bss(*bss
);
2380 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2382 sdata_info(sdata
, "associated\n");
2385 * destroy assoc_data afterwards, as otherwise an idle
2386 * recalc after assoc_data is NULL but before associated
2387 * is set can cause the interface to go idle
2389 ieee80211_destroy_assoc_data(sdata
, true);
2392 return RX_MGMT_CFG80211_RX_ASSOC
;
2395 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2396 struct ieee80211_mgmt
*mgmt
, size_t len
,
2397 struct ieee80211_rx_status
*rx_status
,
2398 struct ieee802_11_elems
*elems
)
2400 struct ieee80211_local
*local
= sdata
->local
;
2402 struct ieee80211_bss
*bss
;
2403 struct ieee80211_channel
*channel
;
2404 bool need_ps
= false;
2406 if ((sdata
->u
.mgd
.associated
&&
2407 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2408 (sdata
->u
.mgd
.assoc_data
&&
2409 ether_addr_equal(mgmt
->bssid
,
2410 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2411 /* not previously set so we may need to recalc */
2412 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2414 if (elems
->tim
&& !elems
->parse_error
) {
2415 struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2416 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2420 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2421 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2424 freq
= rx_status
->freq
;
2426 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2428 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2431 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2434 ieee80211_rx_bss_put(local
, bss
);
2436 if (!sdata
->u
.mgd
.associated
)
2440 mutex_lock(&local
->iflist_mtx
);
2441 ieee80211_recalc_ps(local
, -1);
2442 mutex_unlock(&local
->iflist_mtx
);
2445 if (elems
->ch_switch_ie
&&
2446 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2447 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2448 bss
, rx_status
->mactime
);
2452 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2453 struct sk_buff
*skb
)
2455 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2456 struct ieee80211_if_managed
*ifmgd
;
2457 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2458 size_t baselen
, len
= skb
->len
;
2459 struct ieee802_11_elems elems
;
2461 ifmgd
= &sdata
->u
.mgd
;
2463 ASSERT_MGD_MTX(ifmgd
);
2465 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2466 return; /* ignore ProbeResp to foreign address */
2468 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2472 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2475 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2477 if (ifmgd
->associated
&&
2478 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2479 ieee80211_reset_ap_probe(sdata
);
2481 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2482 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2483 /* got probe response, continue with auth */
2484 sdata_info(sdata
, "direct probe responded\n");
2485 ifmgd
->auth_data
->tries
= 0;
2486 ifmgd
->auth_data
->timeout
= jiffies
;
2487 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2492 * This is the canonical list of information elements we care about,
2493 * the filter code also gives us all changes to the Microsoft OUI
2494 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2496 * We implement beacon filtering in software since that means we can
2497 * avoid processing the frame here and in cfg80211, and userspace
2498 * will not be able to tell whether the hardware supports it or not.
2500 * XXX: This list needs to be dynamic -- userspace needs to be able to
2501 * add items it requires. It also needs to be able to tell us to
2502 * look out for other vendor IEs.
2504 static const u64 care_about_ies
=
2505 (1ULL << WLAN_EID_COUNTRY
) |
2506 (1ULL << WLAN_EID_ERP_INFO
) |
2507 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2508 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2509 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2510 (1ULL << WLAN_EID_HT_OPERATION
);
2512 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2513 struct ieee80211_mgmt
*mgmt
,
2515 struct ieee80211_rx_status
*rx_status
)
2517 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2518 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2520 struct ieee802_11_elems elems
;
2521 struct ieee80211_local
*local
= sdata
->local
;
2522 struct ieee80211_chanctx_conf
*chanctx_conf
;
2523 struct ieee80211_channel
*chan
;
2530 lockdep_assert_held(&ifmgd
->mtx
);
2532 /* Process beacon from the current BSS */
2533 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2538 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2539 if (!chanctx_conf
) {
2544 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2548 chan
= chanctx_conf
->def
.chan
;
2551 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2552 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2553 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2554 len
- baselen
, &elems
);
2556 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2557 ifmgd
->assoc_data
->have_beacon
= true;
2558 /* continue assoc process */
2559 ifmgd
->assoc_data
->timeout
= jiffies
;
2560 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2564 if (!ifmgd
->associated
||
2565 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2567 bssid
= ifmgd
->associated
->bssid
;
2569 /* Track average RSSI from the Beacon frames of the current AP */
2570 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2571 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2572 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2573 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2574 ifmgd
->last_cqm_event_signal
= 0;
2575 ifmgd
->count_beacon_signal
= 1;
2576 ifmgd
->last_ave_beacon_signal
= 0;
2578 ifmgd
->ave_beacon_signal
=
2579 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2580 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2581 ifmgd
->ave_beacon_signal
) / 16;
2582 ifmgd
->count_beacon_signal
++;
2585 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2586 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2587 int sig
= ifmgd
->ave_beacon_signal
;
2588 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2591 * if signal crosses either of the boundaries, invoke callback
2592 * with appropriate parameters
2594 if (sig
> ifmgd
->rssi_max_thold
&&
2595 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2596 ifmgd
->last_ave_beacon_signal
= sig
;
2597 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2598 } else if (sig
< ifmgd
->rssi_min_thold
&&
2599 (last_sig
>= ifmgd
->rssi_max_thold
||
2601 ifmgd
->last_ave_beacon_signal
= sig
;
2602 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2606 if (bss_conf
->cqm_rssi_thold
&&
2607 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2608 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2609 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2610 int last_event
= ifmgd
->last_cqm_event_signal
;
2611 int thold
= bss_conf
->cqm_rssi_thold
;
2612 int hyst
= bss_conf
->cqm_rssi_hyst
;
2614 (last_event
== 0 || sig
< last_event
- hyst
)) {
2615 ifmgd
->last_cqm_event_signal
= sig
;
2616 ieee80211_cqm_rssi_notify(
2618 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2620 } else if (sig
> thold
&&
2621 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2622 ifmgd
->last_cqm_event_signal
= sig
;
2623 ieee80211_cqm_rssi_notify(
2625 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2630 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2631 mlme_dbg_ratelimited(sdata
,
2632 "cancelling probereq poll due to a received beacon\n");
2633 mutex_lock(&local
->mtx
);
2634 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2635 ieee80211_run_deferred_scan(local
);
2636 mutex_unlock(&local
->mtx
);
2638 mutex_lock(&local
->iflist_mtx
);
2639 ieee80211_recalc_ps(local
, -1);
2640 mutex_unlock(&local
->iflist_mtx
);
2644 * Push the beacon loss detection into the future since
2645 * we are processing a beacon from the AP just now.
2647 ieee80211_sta_reset_beacon_monitor(sdata
);
2649 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2650 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2651 len
- baselen
, &elems
,
2652 care_about_ies
, ncrc
);
2654 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2655 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2659 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2660 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2661 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2662 ieee80211_hw_config(local
,
2663 IEEE80211_CONF_CHANGE_PS
);
2665 ieee80211_send_nullfunc(local
, sdata
, 0);
2666 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2667 local
->pspolling
= true;
2670 * Here is assumed that the driver will be
2671 * able to send ps-poll frame and receive a
2672 * response even though power save mode is
2673 * enabled, but some drivers might require
2674 * to disable power save here. This needs
2675 * to be investigated.
2677 ieee80211_send_pspoll(local
, sdata
);
2682 if (sdata
->vif
.p2p
) {
2686 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2688 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2690 if (ret
>= 2 && sdata
->u
.mgd
.p2p_noa_index
!= noa
[0]) {
2691 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
2692 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
2693 changed
|= BSS_CHANGED_P2P_PS
;
2694 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
2696 * make sure we update all information, the CRC
2697 * mechanism doesn't look at P2P attributes.
2699 ifmgd
->beacon_crc_valid
= false;
2703 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2705 ifmgd
->beacon_crc
= ncrc
;
2706 ifmgd
->beacon_crc_valid
= true;
2708 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2710 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2711 elems
.wmm_param_len
))
2712 changed
|= BSS_CHANGED_QOS
;
2714 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2716 erp_value
= elems
.erp_info
[0];
2720 changed
|= ieee80211_handle_bss_capability(sdata
,
2721 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2722 erp_valid
, erp_value
);
2725 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2726 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2727 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2730 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2731 mgmt
->u
.probe_resp
.capab_info
&
2732 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2733 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
2735 elems
.country_elem_len
,
2736 elems
.pwr_constr_elem
);
2738 ieee80211_bss_info_change_notify(sdata
, changed
);
2741 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2742 struct sk_buff
*skb
)
2744 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2745 struct ieee80211_rx_status
*rx_status
;
2746 struct ieee80211_mgmt
*mgmt
;
2747 struct cfg80211_bss
*bss
= NULL
;
2748 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2751 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2752 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2753 fc
= le16_to_cpu(mgmt
->frame_control
);
2755 mutex_lock(&ifmgd
->mtx
);
2757 switch (fc
& IEEE80211_FCTL_STYPE
) {
2758 case IEEE80211_STYPE_BEACON
:
2759 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2761 case IEEE80211_STYPE_PROBE_RESP
:
2762 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2764 case IEEE80211_STYPE_AUTH
:
2765 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2767 case IEEE80211_STYPE_DEAUTH
:
2768 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2770 case IEEE80211_STYPE_DISASSOC
:
2771 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2773 case IEEE80211_STYPE_ASSOC_RESP
:
2774 case IEEE80211_STYPE_REASSOC_RESP
:
2775 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2777 case IEEE80211_STYPE_ACTION
:
2778 switch (mgmt
->u
.action
.category
) {
2779 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2780 ieee80211_sta_process_chanswitch(sdata
,
2781 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2782 (void *)ifmgd
->associated
->priv
,
2783 rx_status
->mactime
);
2787 mutex_unlock(&ifmgd
->mtx
);
2793 case RX_MGMT_CFG80211_DEAUTH
:
2794 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2796 case RX_MGMT_CFG80211_DISASSOC
:
2797 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2799 case RX_MGMT_CFG80211_RX_AUTH
:
2800 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2802 case RX_MGMT_CFG80211_RX_ASSOC
:
2803 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2805 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2806 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2809 WARN(1, "unexpected: %d", rma
);
2813 static void ieee80211_sta_timer(unsigned long data
)
2815 struct ieee80211_sub_if_data
*sdata
=
2816 (struct ieee80211_sub_if_data
*) data
;
2817 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2818 struct ieee80211_local
*local
= sdata
->local
;
2820 if (local
->quiescing
) {
2821 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2825 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2828 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2829 u8
*bssid
, u8 reason
)
2831 struct ieee80211_local
*local
= sdata
->local
;
2832 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2833 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2835 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2837 mutex_unlock(&ifmgd
->mtx
);
2840 * must be outside lock due to cfg80211,
2841 * but that's not a problem.
2843 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2845 mutex_lock(&local
->mtx
);
2846 ieee80211_recalc_idle(local
);
2847 mutex_unlock(&local
->mtx
);
2849 mutex_lock(&ifmgd
->mtx
);
2852 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2854 struct ieee80211_local
*local
= sdata
->local
;
2855 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2856 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2858 lockdep_assert_held(&ifmgd
->mtx
);
2860 if (WARN_ON_ONCE(!auth_data
))
2865 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2866 sdata_info(sdata
, "authentication with %pM timed out\n",
2867 auth_data
->bss
->bssid
);
2870 * Most likely AP is not in the range so remove the
2871 * bss struct for that AP.
2873 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2878 drv_mgd_prepare_tx(local
, sdata
);
2880 if (auth_data
->bss
->proberesp_ies
) {
2884 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2885 auth_data
->bss
->bssid
, auth_data
->tries
,
2886 IEEE80211_AUTH_MAX_TRIES
);
2888 auth_data
->expected_transaction
= 2;
2890 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
2891 trans
= auth_data
->sae_trans
;
2892 status
= auth_data
->sae_status
;
2893 auth_data
->expected_transaction
= trans
;
2896 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
2897 auth_data
->data
, auth_data
->data_len
,
2898 auth_data
->bss
->bssid
,
2899 auth_data
->bss
->bssid
, NULL
, 0, 0);
2903 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2904 auth_data
->bss
->bssid
, auth_data
->tries
,
2905 IEEE80211_AUTH_MAX_TRIES
);
2908 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2914 * Direct probe is sent to broadcast address as some APs
2915 * will not answer to direct packet in unassociated state.
2917 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2918 NULL
, 0, (u32
) -1, true, false,
2919 auth_data
->bss
->channel
, false);
2923 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2924 run_again(ifmgd
, auth_data
->timeout
);
2929 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2931 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2932 struct ieee80211_local
*local
= sdata
->local
;
2934 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2936 assoc_data
->tries
++;
2937 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2938 sdata_info(sdata
, "association with %pM timed out\n",
2939 assoc_data
->bss
->bssid
);
2942 * Most likely AP is not in the range so remove the
2943 * bss struct for that AP.
2945 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2950 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2951 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2952 IEEE80211_ASSOC_MAX_TRIES
);
2953 ieee80211_send_assoc(sdata
);
2955 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2956 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2961 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2963 struct ieee80211_local
*local
= sdata
->local
;
2964 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2966 mutex_lock(&ifmgd
->mtx
);
2968 if (ifmgd
->auth_data
&&
2969 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2970 if (ifmgd
->auth_data
->done
) {
2972 * ok ... we waited for assoc but userspace didn't,
2973 * so let's just kill the auth data
2975 ieee80211_destroy_auth_data(sdata
, false);
2976 } else if (ieee80211_probe_auth(sdata
)) {
2979 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2981 ieee80211_destroy_auth_data(sdata
, false);
2983 mutex_unlock(&ifmgd
->mtx
);
2984 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2985 mutex_lock(&ifmgd
->mtx
);
2987 } else if (ifmgd
->auth_data
)
2988 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2990 if (ifmgd
->assoc_data
&&
2991 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2992 if (!ifmgd
->assoc_data
->have_beacon
||
2993 ieee80211_do_assoc(sdata
)) {
2996 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2998 ieee80211_destroy_assoc_data(sdata
, false);
3000 mutex_unlock(&ifmgd
->mtx
);
3001 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3002 mutex_lock(&ifmgd
->mtx
);
3004 } else if (ifmgd
->assoc_data
)
3005 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3007 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3008 IEEE80211_STA_CONNECTION_POLL
) &&
3009 ifmgd
->associated
) {
3013 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3015 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3016 max_tries
= max_nullfunc_tries
;
3018 max_tries
= max_probe_tries
;
3020 /* ACK received for nullfunc probing frame */
3021 if (!ifmgd
->probe_send_count
)
3022 ieee80211_reset_ap_probe(sdata
);
3023 else if (ifmgd
->nullfunc_failed
) {
3024 if (ifmgd
->probe_send_count
< max_tries
) {
3026 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3027 bssid
, ifmgd
->probe_send_count
,
3029 ieee80211_mgd_probe_ap_send(sdata
);
3032 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3034 ieee80211_sta_connection_lost(sdata
, bssid
,
3035 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3037 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3038 run_again(ifmgd
, ifmgd
->probe_timeout
);
3039 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3041 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3042 bssid
, probe_wait_ms
);
3043 ieee80211_sta_connection_lost(sdata
, bssid
,
3044 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3045 } else if (ifmgd
->probe_send_count
< max_tries
) {
3047 "No probe response from AP %pM after %dms, try %d/%i\n",
3048 bssid
, probe_wait_ms
,
3049 ifmgd
->probe_send_count
, max_tries
);
3050 ieee80211_mgd_probe_ap_send(sdata
);
3053 * We actually lost the connection ... or did we?
3056 wiphy_debug(local
->hw
.wiphy
,
3057 "%s: No probe response from AP %pM"
3058 " after %dms, disconnecting.\n",
3060 bssid
, probe_wait_ms
);
3062 ieee80211_sta_connection_lost(sdata
, bssid
,
3063 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3067 mutex_unlock(&ifmgd
->mtx
);
3069 mutex_lock(&local
->mtx
);
3070 ieee80211_recalc_idle(local
);
3071 mutex_unlock(&local
->mtx
);
3074 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3076 struct ieee80211_sub_if_data
*sdata
=
3077 (struct ieee80211_sub_if_data
*) data
;
3078 struct ieee80211_local
*local
= sdata
->local
;
3080 if (local
->quiescing
)
3083 ieee80211_queue_work(&sdata
->local
->hw
,
3084 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3087 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3089 struct ieee80211_sub_if_data
*sdata
=
3090 (struct ieee80211_sub_if_data
*) data
;
3091 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3092 struct ieee80211_local
*local
= sdata
->local
;
3094 if (local
->quiescing
)
3097 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3100 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3102 struct ieee80211_sub_if_data
*sdata
=
3103 container_of(work
, struct ieee80211_sub_if_data
,
3104 u
.mgd
.monitor_work
);
3106 ieee80211_mgd_probe_ap(sdata
, false);
3109 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3113 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3114 __ieee80211_stop_poll(sdata
);
3116 /* let's probe the connection once */
3117 flags
= sdata
->local
->hw
.flags
;
3118 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3119 ieee80211_queue_work(&sdata
->local
->hw
,
3120 &sdata
->u
.mgd
.monitor_work
);
3121 /* and do all the other regular work too */
3122 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3127 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
3129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3132 * we need to use atomic bitops for the running bits
3133 * only because both timers might fire at the same
3134 * time -- the code here is properly synchronised.
3137 cancel_work_sync(&ifmgd
->request_smps_work
);
3139 cancel_work_sync(&ifmgd
->monitor_work
);
3140 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3141 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3142 if (del_timer_sync(&ifmgd
->timer
))
3143 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3145 cancel_work_sync(&ifmgd
->chswitch_work
);
3146 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3147 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3149 /* these will just be re-established on connection */
3150 del_timer_sync(&ifmgd
->conn_mon_timer
);
3151 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3154 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3158 mutex_lock(&ifmgd
->mtx
);
3159 if (!ifmgd
->associated
) {
3160 mutex_unlock(&ifmgd
->mtx
);
3164 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3165 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3166 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3167 ieee80211_sta_connection_lost(sdata
,
3168 ifmgd
->associated
->bssid
,
3169 WLAN_REASON_UNSPECIFIED
);
3170 mutex_unlock(&ifmgd
->mtx
);
3173 mutex_unlock(&ifmgd
->mtx
);
3175 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3176 add_timer(&ifmgd
->timer
);
3177 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3178 add_timer(&ifmgd
->chswitch_timer
);
3179 ieee80211_sta_reset_beacon_monitor(sdata
);
3181 mutex_lock(&sdata
->local
->mtx
);
3182 ieee80211_restart_sta_timer(sdata
);
3183 mutex_unlock(&sdata
->local
->mtx
);
3187 /* interface setup */
3188 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3190 struct ieee80211_if_managed
*ifmgd
;
3192 ifmgd
= &sdata
->u
.mgd
;
3193 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3194 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3195 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3196 ieee80211_beacon_connection_loss_work
);
3197 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3198 ieee80211_csa_connection_drop_work
);
3199 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3200 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3201 (unsigned long) sdata
);
3202 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3203 (unsigned long) sdata
);
3204 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3205 (unsigned long) sdata
);
3206 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3207 (unsigned long) sdata
);
3210 ifmgd
->powersave
= sdata
->wdev
.ps
;
3211 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3212 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3214 mutex_init(&ifmgd
->mtx
);
3216 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3217 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3219 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3222 /* scan finished notification */
3223 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3225 struct ieee80211_sub_if_data
*sdata
;
3227 /* Restart STA timers */
3229 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3230 ieee80211_restart_sta_timer(sdata
);
3234 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3235 unsigned long data
, void *dummy
)
3237 s32 latency_usec
= (s32
) data
;
3238 struct ieee80211_local
*local
=
3239 container_of(nb
, struct ieee80211_local
,
3240 network_latency_notifier
);
3242 mutex_lock(&local
->iflist_mtx
);
3243 ieee80211_recalc_ps(local
, latency_usec
);
3244 mutex_unlock(&local
->iflist_mtx
);
3249 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
3255 case NL80211_CHAN_WIDTH_20
:
3256 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3257 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3259 case NL80211_CHAN_WIDTH_40
:
3260 c
->width
= NL80211_CHAN_WIDTH_20
;
3261 c
->center_freq1
= c
->chan
->center_freq
;
3262 ret
= IEEE80211_STA_DISABLE_40MHZ
|
3263 IEEE80211_STA_DISABLE_VHT
;
3265 case NL80211_CHAN_WIDTH_80
:
3266 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3270 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
3271 c
->width
= NL80211_CHAN_WIDTH_40
;
3272 ret
= IEEE80211_STA_DISABLE_VHT
;
3274 case NL80211_CHAN_WIDTH_80P80
:
3275 c
->center_freq2
= 0;
3276 c
->width
= NL80211_CHAN_WIDTH_80
;
3277 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3278 IEEE80211_STA_DISABLE_160MHZ
;
3280 case NL80211_CHAN_WIDTH_160
:
3282 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3285 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
3286 c
->width
= NL80211_CHAN_WIDTH_80
;
3287 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3288 IEEE80211_STA_DISABLE_160MHZ
;
3291 case NL80211_CHAN_WIDTH_20_NOHT
:
3293 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3294 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3298 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
3304 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
3305 struct ieee80211_supported_band
*sband
,
3306 struct ieee80211_channel
*channel
,
3307 const struct ieee80211_ht_operation
*ht_oper
,
3308 const struct ieee80211_vht_operation
*vht_oper
,
3309 struct cfg80211_chan_def
*chandef
)
3311 struct cfg80211_chan_def vht_chandef
;
3314 chandef
->chan
= channel
;
3315 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3316 chandef
->center_freq1
= channel
->center_freq
;
3317 chandef
->center_freq2
= 0;
3319 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
3320 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3324 chandef
->width
= NL80211_CHAN_WIDTH_20
;
3326 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3328 /* check that channel matches the right operating channel */
3329 if (channel
->center_freq
!= ht_cfreq
) {
3331 * It's possible that some APs are confused here;
3332 * Netgear WNDR3700 sometimes reports 4 higher than
3333 * the actual channel in association responses, but
3334 * since we look at probe response/beacon data here
3338 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3339 channel
->center_freq
, ht_cfreq
,
3340 ht_oper
->primary_chan
, channel
->band
);
3341 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3345 /* check 40 MHz support, if we have it */
3346 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3347 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3349 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3350 chandef
->center_freq1
+= 10;
3352 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3353 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3354 chandef
->center_freq1
-= 10;
3358 /* 40 MHz (and 80 MHz) must be supported for VHT */
3359 ret
= IEEE80211_STA_DISABLE_VHT
;
3363 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
3364 ret
= IEEE80211_STA_DISABLE_VHT
;
3368 vht_chandef
.chan
= channel
;
3369 vht_chandef
.center_freq1
=
3370 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
3372 vht_chandef
.center_freq2
= 0;
3374 if (vht_oper
->center_freq_seg2_idx
)
3375 vht_chandef
.center_freq2
=
3376 ieee80211_channel_to_frequency(
3377 vht_oper
->center_freq_seg2_idx
,
3380 switch (vht_oper
->chan_width
) {
3381 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
3382 vht_chandef
.width
= chandef
->width
;
3384 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
3385 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
3387 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
3388 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
3390 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
3391 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
3395 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3396 vht_oper
->chan_width
);
3397 ret
= IEEE80211_STA_DISABLE_VHT
;
3401 if (!cfg80211_chandef_valid(&vht_chandef
)) {
3403 "AP VHT information is invalid, disable VHT\n");
3404 ret
= IEEE80211_STA_DISABLE_VHT
;
3408 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
3413 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
3415 "AP VHT information doesn't match HT, disable VHT\n");
3416 ret
= IEEE80211_STA_DISABLE_VHT
;
3420 *chandef
= vht_chandef
;
3424 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
3425 IEEE80211_CHAN_DISABLED
)) {
3426 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
3427 ret
= IEEE80211_STA_DISABLE_HT
|
3428 IEEE80211_STA_DISABLE_VHT
;
3432 ret
= chandef_downgrade(chandef
);
3435 if (chandef
->width
!= vht_chandef
.width
)
3437 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3440 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
3444 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3445 struct cfg80211_bss
*cbss
)
3447 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3448 const u8
*ht_cap_ie
, *vht_cap_ie
;
3449 const struct ieee80211_ht_cap
*ht_cap
;
3450 const struct ieee80211_vht_cap
*vht_cap
;
3453 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3456 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3457 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3458 ht_cap
= (void *)(ht_cap_ie
+ 2);
3459 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3461 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3462 * "Tx Unequal Modulation Supported" fields.
3466 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3469 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3470 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3474 vht_cap
= (void *)(vht_cap_ie
+ 2);
3475 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3476 for (nss
= 8; nss
> 0; nss
--) {
3477 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3478 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3481 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3482 chains
= max(chains
, nss
);
3488 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3489 struct cfg80211_bss
*cbss
)
3491 struct ieee80211_local
*local
= sdata
->local
;
3492 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3493 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3494 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3495 struct ieee80211_supported_band
*sband
;
3496 struct cfg80211_chan_def chandef
;
3499 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3501 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3502 IEEE80211_STA_DISABLE_80P80MHZ
|
3503 IEEE80211_STA_DISABLE_160MHZ
);
3507 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3508 sband
->ht_cap
.ht_supported
) {
3509 const u8
*ht_oper_ie
;
3511 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3512 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3513 ht_oper
= (void *)(ht_oper_ie
+ 2);
3516 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3517 sband
->vht_cap
.vht_supported
) {
3518 const u8
*vht_oper_ie
;
3520 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3521 WLAN_EID_VHT_OPERATION
);
3522 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3523 vht_oper
= (void *)(vht_oper_ie
+ 2);
3524 if (vht_oper
&& !ht_oper
) {
3527 "AP advertised VHT without HT, disabling both\n");
3528 sdata
->flags
|= IEEE80211_STA_DISABLE_HT
;
3529 sdata
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3533 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3538 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3543 /* will change later if needed */
3544 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3547 * If this fails (possibly due to channel context sharing
3548 * on incompatible channels, e.g. 80+80 and 160 sharing the
3549 * same control channel) try to use a smaller bandwidth.
3551 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3552 IEEE80211_CHANCTX_SHARED
);
3553 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
)
3554 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3558 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3559 struct cfg80211_bss
*cbss
, bool assoc
)
3561 struct ieee80211_local
*local
= sdata
->local
;
3562 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3563 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3564 struct sta_info
*new_sta
= NULL
;
3565 bool have_sta
= false;
3568 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3573 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3578 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3583 mutex_lock(&local
->mtx
);
3584 ieee80211_recalc_idle(sdata
->local
);
3585 mutex_unlock(&local
->mtx
);
3588 u32 rates
= 0, basic_rates
= 0;
3589 bool have_higher_than_11mbit
;
3590 int min_rate
= INT_MAX
, min_rate_index
= -1;
3591 struct ieee80211_supported_band
*sband
;
3593 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3595 err
= ieee80211_prep_channel(sdata
, cbss
);
3597 sta_info_free(local
, new_sta
);
3601 ieee80211_get_rates(sband
, bss
->supp_rates
,
3602 bss
->supp_rates_len
,
3603 &rates
, &basic_rates
,
3604 &have_higher_than_11mbit
,
3605 &min_rate
, &min_rate_index
);
3608 * This used to be a workaround for basic rates missing
3609 * in the association response frame. Now that we no
3610 * longer use the basic rates from there, it probably
3611 * doesn't happen any more, but keep the workaround so
3612 * in case some *other* APs are buggy in different ways
3613 * we can connect -- with a warning.
3615 if (!basic_rates
&& min_rate_index
>= 0) {
3617 "No basic rates, using min rate instead\n");
3618 basic_rates
= BIT(min_rate_index
);
3621 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3622 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3624 /* cf. IEEE 802.11 9.2.12 */
3625 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3626 have_higher_than_11mbit
)
3627 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3629 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3631 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3633 /* set timing information */
3634 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3635 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3636 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3638 /* tell driver about BSSID, basic rates and timing */
3639 ieee80211_bss_info_change_notify(sdata
,
3640 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3641 BSS_CHANGED_BEACON_INT
);
3644 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3646 err
= sta_info_insert(new_sta
);
3650 "failed to insert STA entry for the AP (error %d)\n",
3655 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3661 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3662 struct cfg80211_auth_request
*req
)
3664 struct ieee80211_local
*local
= sdata
->local
;
3665 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3666 struct ieee80211_mgd_auth_data
*auth_data
;
3670 /* prepare auth data structure */
3672 switch (req
->auth_type
) {
3673 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3674 auth_alg
= WLAN_AUTH_OPEN
;
3676 case NL80211_AUTHTYPE_SHARED_KEY
:
3677 if (IS_ERR(local
->wep_tx_tfm
))
3679 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3681 case NL80211_AUTHTYPE_FT
:
3682 auth_alg
= WLAN_AUTH_FT
;
3684 case NL80211_AUTHTYPE_NETWORK_EAP
:
3685 auth_alg
= WLAN_AUTH_LEAP
;
3687 case NL80211_AUTHTYPE_SAE
:
3688 auth_alg
= WLAN_AUTH_SAE
;
3694 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3695 req
->ie_len
, GFP_KERNEL
);
3699 auth_data
->bss
= req
->bss
;
3701 if (req
->sae_data_len
>= 4) {
3702 __le16
*pos
= (__le16
*) req
->sae_data
;
3703 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3704 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3705 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3706 req
->sae_data_len
- 4);
3707 auth_data
->data_len
+= req
->sae_data_len
- 4;
3710 if (req
->ie
&& req
->ie_len
) {
3711 memcpy(&auth_data
->data
[auth_data
->data_len
],
3712 req
->ie
, req
->ie_len
);
3713 auth_data
->data_len
+= req
->ie_len
;
3716 if (req
->key
&& req
->key_len
) {
3717 auth_data
->key_len
= req
->key_len
;
3718 auth_data
->key_idx
= req
->key_idx
;
3719 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3722 auth_data
->algorithm
= auth_alg
;
3724 /* try to authenticate/probe */
3726 mutex_lock(&ifmgd
->mtx
);
3728 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3729 ifmgd
->assoc_data
) {
3734 if (ifmgd
->auth_data
)
3735 ieee80211_destroy_auth_data(sdata
, false);
3737 /* prep auth_data so we don't go into idle on disassoc */
3738 ifmgd
->auth_data
= auth_data
;
3740 if (ifmgd
->associated
)
3741 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3743 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3745 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3749 err
= ieee80211_probe_auth(sdata
);
3751 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3755 /* hold our own reference */
3756 cfg80211_ref_bss(auth_data
->bss
);
3761 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3762 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3763 ifmgd
->auth_data
= NULL
;
3767 mutex_unlock(&ifmgd
->mtx
);
3772 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3773 struct cfg80211_assoc_request
*req
)
3775 struct ieee80211_local
*local
= sdata
->local
;
3776 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3777 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3778 struct ieee80211_mgd_assoc_data
*assoc_data
;
3779 struct ieee80211_supported_band
*sband
;
3780 const u8
*ssidie
, *ht_ie
, *vht_ie
;
3783 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3788 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3794 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3795 assoc_data
->ssid_len
= ssidie
[1];
3798 mutex_lock(&ifmgd
->mtx
);
3800 if (ifmgd
->associated
)
3801 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3803 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3808 if (ifmgd
->assoc_data
) {
3813 if (ifmgd
->auth_data
) {
3816 /* keep sta info, bssid if matching */
3817 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3818 ieee80211_destroy_auth_data(sdata
, match
);
3821 /* prepare assoc data */
3823 ifmgd
->beacon_crc_valid
= false;
3826 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3827 * We still associate in non-HT mode (11a/b/g) if any one of these
3828 * ciphers is configured as pairwise.
3829 * We can set this to true for non-11n hardware, that'll be checked
3830 * separately along with the peer capabilities.
3832 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3833 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3834 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3835 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3836 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3837 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3838 netdev_info(sdata
->dev
,
3839 "disabling HT/VHT due to WEP/TKIP use\n");
3843 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3844 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3845 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3848 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3849 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3850 if (!sband
->ht_cap
.ht_supported
||
3851 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3852 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3854 netdev_info(sdata
->dev
,
3855 "disabling HT as WMM/QoS is not supported by the AP\n");
3858 /* disable VHT if we don't support it or the AP doesn't use WMM */
3859 if (!sband
->vht_cap
.vht_supported
||
3860 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3861 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3863 netdev_info(sdata
->dev
,
3864 "disabling VHT as WMM/QoS is not supported by the AP\n");
3867 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3868 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3869 sizeof(ifmgd
->ht_capa_mask
));
3871 if (req
->ie
&& req
->ie_len
) {
3872 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3873 assoc_data
->ie_len
= req
->ie_len
;
3876 assoc_data
->bss
= req
->bss
;
3878 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3879 if (ifmgd
->powersave
)
3880 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3882 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3884 sdata
->smps_mode
= ifmgd
->req_smps
;
3886 assoc_data
->capability
= req
->bss
->capability
;
3887 assoc_data
->wmm
= bss
->wmm_used
&&
3888 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3889 assoc_data
->supp_rates
= bss
->supp_rates
;
3890 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3893 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3894 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3895 assoc_data
->ap_ht_param
=
3896 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3898 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3899 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
3900 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
3901 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
3902 sizeof(struct ieee80211_vht_cap
));
3904 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3907 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3908 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3909 assoc_data
->uapsd
= true;
3910 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3912 assoc_data
->uapsd
= false;
3913 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3916 if (req
->prev_bssid
)
3917 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3920 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3921 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3923 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3924 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3927 if (req
->crypto
.control_port
)
3928 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3930 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3932 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3933 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3935 /* kick off associate process */
3937 ifmgd
->assoc_data
= assoc_data
;
3938 ifmgd
->dtim_period
= 0;
3940 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3944 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3945 const struct cfg80211_bss_ies
*beacon_ies
;
3948 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
3951 * Wait up to one beacon interval ...
3952 * should this be more if we miss one?
3954 sdata_info(sdata
, "waiting for beacon from %pM\n",
3956 assoc_data
->timeout
=
3957 TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3959 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3962 if (tim_ie
&& tim_ie
[1] >=
3963 sizeof(struct ieee80211_tim_ie
)) {
3964 const struct ieee80211_tim_ie
*tim
;
3965 tim
= (void *)(tim_ie
+ 2);
3966 ifmgd
->dtim_period
= tim
->dtim_period
;
3968 assoc_data
->have_beacon
= true;
3969 assoc_data
->timeout
= jiffies
;
3973 assoc_data
->have_beacon
= true;
3974 assoc_data
->timeout
= jiffies
;
3976 run_again(ifmgd
, assoc_data
->timeout
);
3978 if (bss
->corrupt_data
) {
3979 char *corrupt_type
= "data";
3980 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3981 if (bss
->corrupt_data
&
3982 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3983 corrupt_type
= "beacon and probe response";
3985 corrupt_type
= "beacon";
3986 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3987 corrupt_type
= "probe response";
3988 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3995 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3996 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3997 ifmgd
->assoc_data
= NULL
;
4001 mutex_unlock(&ifmgd
->mtx
);
4006 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4007 struct cfg80211_deauth_request
*req
)
4009 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4010 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4011 bool tx
= !req
->local_state_change
;
4012 bool sent_frame
= false;
4014 mutex_lock(&ifmgd
->mtx
);
4017 "deauthenticating from %pM by local choice (reason=%d)\n",
4018 req
->bssid
, req
->reason_code
);
4020 if (ifmgd
->auth_data
) {
4021 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4022 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4023 IEEE80211_STYPE_DEAUTH
,
4024 req
->reason_code
, tx
,
4026 ieee80211_destroy_auth_data(sdata
, false);
4027 mutex_unlock(&ifmgd
->mtx
);
4033 if (ifmgd
->associated
&&
4034 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4035 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4036 req
->reason_code
, tx
, frame_buf
);
4039 mutex_unlock(&ifmgd
->mtx
);
4042 mutex_lock(&sdata
->local
->mtx
);
4043 ieee80211_recalc_idle(sdata
->local
);
4044 mutex_unlock(&sdata
->local
->mtx
);
4047 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4048 IEEE80211_DEAUTH_FRAME_LEN
);
4053 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4054 struct cfg80211_disassoc_request
*req
)
4056 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4058 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4060 mutex_lock(&ifmgd
->mtx
);
4063 * cfg80211 should catch this ... but it's racy since
4064 * we can receive a disassoc frame, process it, hand it
4065 * to cfg80211 while that's in a locked section already
4066 * trying to tell us that the user wants to disconnect.
4068 if (ifmgd
->associated
!= req
->bss
) {
4069 mutex_unlock(&ifmgd
->mtx
);
4074 "disassociating from %pM by local choice (reason=%d)\n",
4075 req
->bss
->bssid
, req
->reason_code
);
4077 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4078 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4079 req
->reason_code
, !req
->local_state_change
,
4081 mutex_unlock(&ifmgd
->mtx
);
4083 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4084 IEEE80211_DEAUTH_FRAME_LEN
);
4086 mutex_lock(&sdata
->local
->mtx
);
4087 ieee80211_recalc_idle(sdata
->local
);
4088 mutex_unlock(&sdata
->local
->mtx
);
4093 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4095 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4097 mutex_lock(&ifmgd
->mtx
);
4098 if (ifmgd
->assoc_data
)
4099 ieee80211_destroy_assoc_data(sdata
, false);
4100 if (ifmgd
->auth_data
)
4101 ieee80211_destroy_auth_data(sdata
, false);
4102 del_timer_sync(&ifmgd
->timer
);
4103 mutex_unlock(&ifmgd
->mtx
);
4106 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4107 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4110 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4112 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4114 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4116 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);