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
;
1490 struct sta_info
*sta
;
1493 ASSERT_MGD_MTX(ifmgd
);
1495 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1498 if (WARN_ON(!ifmgd
->associated
))
1501 ieee80211_stop_poll(sdata
);
1503 ifmgd
->associated
= NULL
;
1506 * we need to commit the associated = NULL change because the
1507 * scan code uses that to determine whether this iface should
1508 * go to/wake up from powersave or not -- and could otherwise
1509 * wake the queues erroneously.
1514 * Thus, we can only afterwards stop the queues -- to account
1515 * for the case where another CPU is finishing a scan at this
1516 * time -- we don't want the scan code to enable queues.
1519 netif_tx_stop_all_queues(sdata
->dev
);
1520 netif_carrier_off(sdata
->dev
);
1522 mutex_lock(&local
->sta_mtx
);
1523 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1525 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1526 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
1528 mutex_unlock(&local
->sta_mtx
);
1531 * if we want to get out of ps before disassoc (why?) we have
1532 * to do it before sending disassoc, as otherwise the null-packet
1535 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1536 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1537 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1539 local
->ps_sdata
= NULL
;
1541 /* disable per-vif ps */
1542 ieee80211_recalc_ps_vif(sdata
);
1544 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1546 drv_flush(local
, false);
1548 /* deauthenticate/disassociate now */
1549 if (tx
|| frame_buf
)
1550 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1551 reason
, tx
, frame_buf
);
1553 /* flush out frame */
1555 drv_flush(local
, false);
1557 /* clear bssid only after building the needed mgmt frames */
1558 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1560 /* remove AP and TDLS peers */
1561 sta_info_flush_defer(sdata
);
1563 /* finally reset all BSS / config parameters */
1564 changed
|= ieee80211_reset_erp_info(sdata
);
1566 ieee80211_led_assoc(local
, 0);
1567 changed
|= BSS_CHANGED_ASSOC
;
1568 sdata
->vif
.bss_conf
.assoc
= false;
1570 sdata
->vif
.bss_conf
.p2p_ctwindow
= 0;
1571 sdata
->vif
.bss_conf
.p2p_oppps
= false;
1573 /* on the next assoc, re-program HT parameters */
1574 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1575 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1577 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1579 del_timer_sync(&local
->dynamic_ps_timer
);
1580 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1582 /* Disable ARP filtering */
1583 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1584 changed
|= BSS_CHANGED_ARP_FILTER
;
1586 sdata
->vif
.bss_conf
.qos
= false;
1587 changed
|= BSS_CHANGED_QOS
;
1589 /* The BSSID (not really interesting) and HT changed */
1590 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1591 ieee80211_bss_info_change_notify(sdata
, changed
);
1593 /* disassociated - set to defaults now */
1594 ieee80211_set_wmm_default(sdata
, false);
1596 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1597 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1598 del_timer_sync(&sdata
->u
.mgd
.timer
);
1599 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1601 sdata
->u
.mgd
.timers_running
= 0;
1603 sdata
->vif
.bss_conf
.dtim_period
= 0;
1606 ieee80211_vif_release_channel(sdata
);
1609 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1610 struct ieee80211_hdr
*hdr
)
1613 * We can postpone the mgd.timer whenever receiving unicast frames
1614 * from AP because we know that the connection is working both ways
1615 * at that time. But multicast frames (and hence also beacons) must
1616 * be ignored here, because we need to trigger the timer during
1617 * data idle periods for sending the periodic probe request to the
1618 * AP we're connected to.
1620 if (is_multicast_ether_addr(hdr
->addr1
))
1623 ieee80211_sta_reset_conn_monitor(sdata
);
1626 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1628 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1629 struct ieee80211_local
*local
= sdata
->local
;
1631 mutex_lock(&local
->mtx
);
1632 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1633 IEEE80211_STA_CONNECTION_POLL
))) {
1634 mutex_unlock(&local
->mtx
);
1638 __ieee80211_stop_poll(sdata
);
1640 mutex_lock(&local
->iflist_mtx
);
1641 ieee80211_recalc_ps(local
, -1);
1642 mutex_unlock(&local
->iflist_mtx
);
1644 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1648 * We've received a probe response, but are not sure whether
1649 * we have or will be receiving any beacons or data, so let's
1650 * schedule the timers again, just in case.
1652 ieee80211_sta_reset_beacon_monitor(sdata
);
1654 mod_timer(&ifmgd
->conn_mon_timer
,
1655 round_jiffies_up(jiffies
+
1656 IEEE80211_CONNECTION_IDLE_TIME
));
1658 mutex_unlock(&local
->mtx
);
1661 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1662 struct ieee80211_hdr
*hdr
, bool ack
)
1664 if (!ieee80211_is_data(hdr
->frame_control
))
1668 ieee80211_sta_reset_conn_monitor(sdata
);
1670 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1671 sdata
->u
.mgd
.probe_send_count
> 0) {
1673 sdata
->u
.mgd
.probe_send_count
= 0;
1675 sdata
->u
.mgd
.nullfunc_failed
= true;
1676 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1680 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1682 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1684 u8
*dst
= ifmgd
->associated
->bssid
;
1685 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1688 * Try sending broadcast probe requests for the last three
1689 * probe requests after the first ones failed since some
1690 * buggy APs only support broadcast probe requests.
1692 if (ifmgd
->probe_send_count
>= unicast_limit
)
1696 * When the hardware reports an accurate Tx ACK status, it's
1697 * better to send a nullfunc frame instead of a probe request,
1698 * as it will kick us off the AP quickly if we aren't associated
1699 * anymore. The timeout will be reset if the frame is ACKed by
1702 ifmgd
->probe_send_count
++;
1704 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1705 ifmgd
->nullfunc_failed
= false;
1706 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1711 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1712 if (WARN_ON_ONCE(ssid
== NULL
))
1717 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1718 0, (u32
) -1, true, false,
1719 ifmgd
->associated
->channel
, false);
1723 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1724 run_again(ifmgd
, ifmgd
->probe_timeout
);
1725 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1726 drv_flush(sdata
->local
, false);
1729 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1732 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1733 bool already
= false;
1735 if (!ieee80211_sdata_running(sdata
))
1738 mutex_lock(&ifmgd
->mtx
);
1740 if (!ifmgd
->associated
)
1743 mutex_lock(&sdata
->local
->mtx
);
1745 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1746 mutex_unlock(&sdata
->local
->mtx
);
1751 mlme_dbg_ratelimited(sdata
,
1752 "detected beacon loss from AP - sending probe request\n");
1754 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1755 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1758 * The driver/our work has already reported this event or the
1759 * connection monitoring has kicked in and we have already sent
1760 * a probe request. Or maybe the AP died and the driver keeps
1761 * reporting until we disassociate...
1763 * In either case we have to ignore the current call to this
1764 * function (except for setting the correct probe reason bit)
1765 * because otherwise we would reset the timer every time and
1766 * never check whether we received a probe response!
1768 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1769 IEEE80211_STA_CONNECTION_POLL
))
1773 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1775 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1777 mutex_unlock(&sdata
->local
->mtx
);
1782 mutex_lock(&sdata
->local
->iflist_mtx
);
1783 ieee80211_recalc_ps(sdata
->local
, -1);
1784 mutex_unlock(&sdata
->local
->iflist_mtx
);
1786 ifmgd
->probe_send_count
= 0;
1787 ieee80211_mgd_probe_ap_send(sdata
);
1789 mutex_unlock(&ifmgd
->mtx
);
1792 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1793 struct ieee80211_vif
*vif
)
1795 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1796 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1797 struct cfg80211_bss
*cbss
;
1798 struct sk_buff
*skb
;
1802 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1805 ASSERT_MGD_MTX(ifmgd
);
1807 if (ifmgd
->associated
)
1808 cbss
= ifmgd
->associated
;
1809 else if (ifmgd
->auth_data
)
1810 cbss
= ifmgd
->auth_data
->bss
;
1811 else if (ifmgd
->assoc_data
)
1812 cbss
= ifmgd
->assoc_data
->bss
;
1817 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1818 if (WARN_ON_ONCE(ssid
== NULL
))
1823 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1824 (u32
) -1, cbss
->channel
,
1831 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1833 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
,
1834 bool transmit_frame
)
1836 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1837 struct ieee80211_local
*local
= sdata
->local
;
1838 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1840 mutex_lock(&ifmgd
->mtx
);
1841 if (!ifmgd
->associated
) {
1842 mutex_unlock(&ifmgd
->mtx
);
1846 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1847 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1848 transmit_frame
, frame_buf
);
1849 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1850 mutex_unlock(&ifmgd
->mtx
);
1853 * must be outside lock due to cfg80211,
1854 * but that's not a problem.
1856 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1858 mutex_lock(&local
->mtx
);
1859 ieee80211_recalc_idle(local
);
1860 mutex_unlock(&local
->mtx
);
1863 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1865 struct ieee80211_sub_if_data
*sdata
=
1866 container_of(work
, struct ieee80211_sub_if_data
,
1867 u
.mgd
.beacon_connection_loss_work
);
1868 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1869 struct sta_info
*sta
;
1871 if (ifmgd
->associated
) {
1873 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1875 sta
->beacon_loss_count
++;
1879 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
) {
1880 sdata_info(sdata
, "Connection to AP %pM lost\n",
1882 __ieee80211_disconnect(sdata
, false);
1884 ieee80211_mgd_probe_ap(sdata
, true);
1888 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1890 struct ieee80211_sub_if_data
*sdata
=
1891 container_of(work
, struct ieee80211_sub_if_data
,
1892 u
.mgd
.csa_connection_drop_work
);
1894 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1895 IEEE80211_QUEUE_STOP_REASON_CSA
);
1896 __ieee80211_disconnect(sdata
, true);
1899 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1901 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1902 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1904 trace_api_beacon_loss(sdata
);
1906 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1907 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1909 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1911 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1913 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1914 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1916 trace_api_connection_loss(sdata
);
1918 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1919 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1921 EXPORT_SYMBOL(ieee80211_connection_loss
);
1924 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1927 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1929 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1932 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1934 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1935 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1936 sdata
->u
.mgd
.flags
= 0;
1937 ieee80211_vif_release_channel(sdata
);
1940 cfg80211_put_bss(auth_data
->bss
);
1942 sdata
->u
.mgd
.auth_data
= NULL
;
1945 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1946 struct ieee80211_mgmt
*mgmt
, size_t len
)
1948 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1950 struct ieee802_11_elems elems
;
1952 pos
= mgmt
->u
.auth
.variable
;
1953 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1954 if (!elems
.challenge
)
1956 auth_data
->expected_transaction
= 4;
1957 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1958 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
1959 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1960 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1961 auth_data
->key
, auth_data
->key_len
,
1962 auth_data
->key_idx
);
1965 static enum rx_mgmt_action __must_check
1966 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1967 struct ieee80211_mgmt
*mgmt
, size_t len
)
1969 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1971 u16 auth_alg
, auth_transaction
, status_code
;
1972 struct sta_info
*sta
;
1974 lockdep_assert_held(&ifmgd
->mtx
);
1977 return RX_MGMT_NONE
;
1979 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1980 return RX_MGMT_NONE
;
1982 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1984 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1985 return RX_MGMT_NONE
;
1987 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1988 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1989 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1991 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1992 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
1993 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1994 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
1996 ifmgd
->auth_data
->expected_transaction
);
1997 return RX_MGMT_NONE
;
2000 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2001 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2002 mgmt
->sa
, status_code
);
2003 ieee80211_destroy_auth_data(sdata
, false);
2004 return RX_MGMT_CFG80211_RX_AUTH
;
2007 switch (ifmgd
->auth_data
->algorithm
) {
2008 case WLAN_AUTH_OPEN
:
2009 case WLAN_AUTH_LEAP
:
2013 case WLAN_AUTH_SHARED_KEY
:
2014 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2015 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2016 /* need another frame */
2017 return RX_MGMT_NONE
;
2021 WARN_ONCE(1, "invalid auth alg %d",
2022 ifmgd
->auth_data
->algorithm
);
2023 return RX_MGMT_NONE
;
2026 sdata_info(sdata
, "authenticated\n");
2027 ifmgd
->auth_data
->done
= true;
2028 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2029 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2031 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2032 ifmgd
->auth_data
->expected_transaction
!= 2) {
2034 * Report auth frame to user space for processing since another
2035 * round of Authentication frames is still needed.
2037 return RX_MGMT_CFG80211_RX_AUTH
;
2040 /* move station state to auth */
2041 mutex_lock(&sdata
->local
->sta_mtx
);
2042 sta
= sta_info_get(sdata
, bssid
);
2044 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2047 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2048 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2051 mutex_unlock(&sdata
->local
->sta_mtx
);
2053 return RX_MGMT_CFG80211_RX_AUTH
;
2055 mutex_unlock(&sdata
->local
->sta_mtx
);
2056 /* ignore frame -- wait for timeout */
2057 return RX_MGMT_NONE
;
2061 static enum rx_mgmt_action __must_check
2062 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2063 struct ieee80211_mgmt
*mgmt
, size_t len
)
2065 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2066 const u8
*bssid
= NULL
;
2069 lockdep_assert_held(&ifmgd
->mtx
);
2072 return RX_MGMT_NONE
;
2074 if (!ifmgd
->associated
||
2075 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2076 return RX_MGMT_NONE
;
2078 bssid
= ifmgd
->associated
->bssid
;
2080 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2082 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2083 bssid
, reason_code
);
2085 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2087 mutex_lock(&sdata
->local
->mtx
);
2088 ieee80211_recalc_idle(sdata
->local
);
2089 mutex_unlock(&sdata
->local
->mtx
);
2091 return RX_MGMT_CFG80211_DEAUTH
;
2095 static enum rx_mgmt_action __must_check
2096 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2097 struct ieee80211_mgmt
*mgmt
, size_t len
)
2099 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2102 lockdep_assert_held(&ifmgd
->mtx
);
2105 return RX_MGMT_NONE
;
2107 if (!ifmgd
->associated
||
2108 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2109 return RX_MGMT_NONE
;
2111 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2113 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2114 mgmt
->sa
, reason_code
);
2116 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2118 mutex_lock(&sdata
->local
->mtx
);
2119 ieee80211_recalc_idle(sdata
->local
);
2120 mutex_unlock(&sdata
->local
->mtx
);
2122 return RX_MGMT_CFG80211_DISASSOC
;
2125 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2126 u8
*supp_rates
, unsigned int supp_rates_len
,
2127 u32
*rates
, u32
*basic_rates
,
2128 bool *have_higher_than_11mbit
,
2129 int *min_rate
, int *min_rate_index
)
2133 for (i
= 0; i
< supp_rates_len
; i
++) {
2134 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2135 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2138 *have_higher_than_11mbit
= true;
2141 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2142 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2144 * Note: Even through the membership selector and the basic
2145 * rate flag share the same bit, they are not exactly
2148 if (!!(supp_rates
[i
] & 0x80) &&
2149 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2152 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2153 if (sband
->bitrates
[j
].bitrate
== rate
) {
2156 *basic_rates
|= BIT(j
);
2157 if (rate
< *min_rate
) {
2159 *min_rate_index
= j
;
2167 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2170 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2172 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2175 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2177 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2178 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2179 sdata
->u
.mgd
.flags
= 0;
2180 ieee80211_vif_release_channel(sdata
);
2184 sdata
->u
.mgd
.assoc_data
= NULL
;
2187 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2188 struct cfg80211_bss
*cbss
,
2189 struct ieee80211_mgmt
*mgmt
, size_t len
)
2191 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2192 struct ieee80211_local
*local
= sdata
->local
;
2193 struct ieee80211_supported_band
*sband
;
2194 struct sta_info
*sta
;
2196 u16 capab_info
, aid
;
2197 struct ieee802_11_elems elems
;
2198 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2202 /* AssocResp and ReassocResp have identical structure */
2204 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2205 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2207 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2208 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2210 aid
&= ~(BIT(15) | BIT(14));
2212 ifmgd
->broken_ap
= false;
2214 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2215 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2218 ifmgd
->broken_ap
= true;
2221 pos
= mgmt
->u
.assoc_resp
.variable
;
2222 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2224 if (!elems
.supp_rates
) {
2225 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2231 mutex_lock(&sdata
->local
->sta_mtx
);
2233 * station info was already allocated and inserted before
2234 * the association and should be available to us
2236 sta
= sta_info_get(sdata
, cbss
->bssid
);
2237 if (WARN_ON(!sta
)) {
2238 mutex_unlock(&sdata
->local
->sta_mtx
);
2242 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2244 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2245 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2246 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2248 sta
->supports_40mhz
=
2249 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2251 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2252 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2256 rate_control_rate_init(sta
);
2258 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2259 set_sta_flag(sta
, WLAN_STA_MFP
);
2261 if (elems
.wmm_param
)
2262 set_sta_flag(sta
, WLAN_STA_WME
);
2264 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2266 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2267 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2268 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2271 "failed to move station %pM to desired state\n",
2273 WARN_ON(__sta_info_destroy(sta
));
2274 mutex_unlock(&sdata
->local
->sta_mtx
);
2278 mutex_unlock(&sdata
->local
->sta_mtx
);
2281 * Always handle WMM once after association regardless
2282 * of the first value the AP uses. Setting -1 here has
2283 * that effect because the AP values is an unsigned
2286 ifmgd
->wmm_last_param_set
= -1;
2288 if (elems
.wmm_param
)
2289 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2290 elems
.wmm_param_len
);
2292 ieee80211_set_wmm_default(sdata
, false);
2293 changed
|= BSS_CHANGED_QOS
;
2295 if (elems
.ht_operation
&& elems
.wmm_param
&&
2296 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2297 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2298 cbss
->bssid
, false);
2300 /* set AID and assoc capability,
2301 * ieee80211_set_associated() will tell the driver */
2302 bss_conf
->aid
= aid
;
2303 bss_conf
->assoc_capability
= capab_info
;
2304 ieee80211_set_associated(sdata
, cbss
, changed
);
2307 * If we're using 4-addr mode, let the AP know that we're
2308 * doing so, so that it can create the STA VLAN on its side
2310 if (ifmgd
->use_4addr
)
2311 ieee80211_send_4addr_nullfunc(local
, sdata
);
2314 * Start timer to probe the connection to the AP now.
2315 * Also start the timer that will detect beacon loss.
2317 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2318 ieee80211_sta_reset_beacon_monitor(sdata
);
2323 static enum rx_mgmt_action __must_check
2324 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2325 struct ieee80211_mgmt
*mgmt
, size_t len
,
2326 struct cfg80211_bss
**bss
)
2328 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2329 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2330 u16 capab_info
, status_code
, aid
;
2331 struct ieee802_11_elems elems
;
2335 lockdep_assert_held(&ifmgd
->mtx
);
2338 return RX_MGMT_NONE
;
2339 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2340 return RX_MGMT_NONE
;
2343 * AssocResp and ReassocResp have identical structure, so process both
2344 * of them in this function.
2348 return RX_MGMT_NONE
;
2350 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2351 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2352 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2353 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2356 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2357 reassoc
? "Rea" : "A", mgmt
->sa
,
2358 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2360 pos
= mgmt
->u
.assoc_resp
.variable
;
2361 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2363 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2364 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2365 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2367 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2368 ms
= tu
* 1024 / 1000;
2370 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2372 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2373 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2374 run_again(ifmgd
, assoc_data
->timeout
);
2375 return RX_MGMT_NONE
;
2378 *bss
= assoc_data
->bss
;
2380 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2381 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2382 mgmt
->sa
, status_code
);
2383 ieee80211_destroy_assoc_data(sdata
, false);
2385 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2386 /* oops -- internal error -- send timeout for now */
2387 ieee80211_destroy_assoc_data(sdata
, false);
2388 cfg80211_put_bss(*bss
);
2389 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2391 sdata_info(sdata
, "associated\n");
2394 * destroy assoc_data afterwards, as otherwise an idle
2395 * recalc after assoc_data is NULL but before associated
2396 * is set can cause the interface to go idle
2398 ieee80211_destroy_assoc_data(sdata
, true);
2401 return RX_MGMT_CFG80211_RX_ASSOC
;
2404 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2405 struct ieee80211_mgmt
*mgmt
, size_t len
,
2406 struct ieee80211_rx_status
*rx_status
,
2407 struct ieee802_11_elems
*elems
)
2409 struct ieee80211_local
*local
= sdata
->local
;
2411 struct ieee80211_bss
*bss
;
2412 struct ieee80211_channel
*channel
;
2413 bool need_ps
= false;
2415 if ((sdata
->u
.mgd
.associated
&&
2416 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2417 (sdata
->u
.mgd
.assoc_data
&&
2418 ether_addr_equal(mgmt
->bssid
,
2419 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2420 /* not previously set so we may need to recalc */
2421 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2423 if (elems
->tim
&& !elems
->parse_error
) {
2424 struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2425 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2429 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2430 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2433 freq
= rx_status
->freq
;
2435 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2437 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2440 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2443 ieee80211_rx_bss_put(local
, bss
);
2445 if (!sdata
->u
.mgd
.associated
)
2449 mutex_lock(&local
->iflist_mtx
);
2450 ieee80211_recalc_ps(local
, -1);
2451 mutex_unlock(&local
->iflist_mtx
);
2454 if (elems
->ch_switch_ie
&&
2455 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2456 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2457 bss
, rx_status
->mactime
);
2461 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2462 struct sk_buff
*skb
)
2464 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2465 struct ieee80211_if_managed
*ifmgd
;
2466 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2467 size_t baselen
, len
= skb
->len
;
2468 struct ieee802_11_elems elems
;
2470 ifmgd
= &sdata
->u
.mgd
;
2472 ASSERT_MGD_MTX(ifmgd
);
2474 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2475 return; /* ignore ProbeResp to foreign address */
2477 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2481 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2484 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2486 if (ifmgd
->associated
&&
2487 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2488 ieee80211_reset_ap_probe(sdata
);
2490 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2491 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2492 /* got probe response, continue with auth */
2493 sdata_info(sdata
, "direct probe responded\n");
2494 ifmgd
->auth_data
->tries
= 0;
2495 ifmgd
->auth_data
->timeout
= jiffies
;
2496 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2501 * This is the canonical list of information elements we care about,
2502 * the filter code also gives us all changes to the Microsoft OUI
2503 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2505 * We implement beacon filtering in software since that means we can
2506 * avoid processing the frame here and in cfg80211, and userspace
2507 * will not be able to tell whether the hardware supports it or not.
2509 * XXX: This list needs to be dynamic -- userspace needs to be able to
2510 * add items it requires. It also needs to be able to tell us to
2511 * look out for other vendor IEs.
2513 static const u64 care_about_ies
=
2514 (1ULL << WLAN_EID_COUNTRY
) |
2515 (1ULL << WLAN_EID_ERP_INFO
) |
2516 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2517 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2518 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2519 (1ULL << WLAN_EID_HT_OPERATION
);
2521 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2522 struct ieee80211_mgmt
*mgmt
,
2524 struct ieee80211_rx_status
*rx_status
)
2526 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2527 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2529 struct ieee802_11_elems elems
;
2530 struct ieee80211_local
*local
= sdata
->local
;
2531 struct ieee80211_chanctx_conf
*chanctx_conf
;
2532 struct ieee80211_channel
*chan
;
2539 lockdep_assert_held(&ifmgd
->mtx
);
2541 /* Process beacon from the current BSS */
2542 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2547 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2548 if (!chanctx_conf
) {
2553 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2557 chan
= chanctx_conf
->def
.chan
;
2560 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2561 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2562 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2563 len
- baselen
, &elems
);
2565 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2566 ifmgd
->assoc_data
->have_beacon
= true;
2567 ifmgd
->assoc_data
->sent_assoc
= false;
2568 /* continue assoc process */
2569 ifmgd
->assoc_data
->timeout
= jiffies
;
2570 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2574 if (!ifmgd
->associated
||
2575 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2577 bssid
= ifmgd
->associated
->bssid
;
2579 /* Track average RSSI from the Beacon frames of the current AP */
2580 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2581 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2582 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2583 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2584 ifmgd
->last_cqm_event_signal
= 0;
2585 ifmgd
->count_beacon_signal
= 1;
2586 ifmgd
->last_ave_beacon_signal
= 0;
2588 ifmgd
->ave_beacon_signal
=
2589 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2590 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2591 ifmgd
->ave_beacon_signal
) / 16;
2592 ifmgd
->count_beacon_signal
++;
2595 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2596 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2597 int sig
= ifmgd
->ave_beacon_signal
;
2598 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2601 * if signal crosses either of the boundaries, invoke callback
2602 * with appropriate parameters
2604 if (sig
> ifmgd
->rssi_max_thold
&&
2605 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2606 ifmgd
->last_ave_beacon_signal
= sig
;
2607 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2608 } else if (sig
< ifmgd
->rssi_min_thold
&&
2609 (last_sig
>= ifmgd
->rssi_max_thold
||
2611 ifmgd
->last_ave_beacon_signal
= sig
;
2612 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2616 if (bss_conf
->cqm_rssi_thold
&&
2617 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2618 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2619 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2620 int last_event
= ifmgd
->last_cqm_event_signal
;
2621 int thold
= bss_conf
->cqm_rssi_thold
;
2622 int hyst
= bss_conf
->cqm_rssi_hyst
;
2624 (last_event
== 0 || sig
< last_event
- hyst
)) {
2625 ifmgd
->last_cqm_event_signal
= sig
;
2626 ieee80211_cqm_rssi_notify(
2628 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2630 } else if (sig
> thold
&&
2631 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2632 ifmgd
->last_cqm_event_signal
= sig
;
2633 ieee80211_cqm_rssi_notify(
2635 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2640 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2641 mlme_dbg_ratelimited(sdata
,
2642 "cancelling probereq poll due to a received beacon\n");
2643 mutex_lock(&local
->mtx
);
2644 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2645 ieee80211_run_deferred_scan(local
);
2646 mutex_unlock(&local
->mtx
);
2648 mutex_lock(&local
->iflist_mtx
);
2649 ieee80211_recalc_ps(local
, -1);
2650 mutex_unlock(&local
->iflist_mtx
);
2654 * Push the beacon loss detection into the future since
2655 * we are processing a beacon from the AP just now.
2657 ieee80211_sta_reset_beacon_monitor(sdata
);
2659 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2660 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2661 len
- baselen
, &elems
,
2662 care_about_ies
, ncrc
);
2664 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2665 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2669 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2670 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2671 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2672 ieee80211_hw_config(local
,
2673 IEEE80211_CONF_CHANGE_PS
);
2675 ieee80211_send_nullfunc(local
, sdata
, 0);
2676 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2677 local
->pspolling
= true;
2680 * Here is assumed that the driver will be
2681 * able to send ps-poll frame and receive a
2682 * response even though power save mode is
2683 * enabled, but some drivers might require
2684 * to disable power save here. This needs
2685 * to be investigated.
2687 ieee80211_send_pspoll(local
, sdata
);
2692 if (sdata
->vif
.p2p
) {
2696 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2698 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2700 if (ret
>= 2 && sdata
->u
.mgd
.p2p_noa_index
!= noa
[0]) {
2701 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
2702 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
2703 changed
|= BSS_CHANGED_P2P_PS
;
2704 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
2706 * make sure we update all information, the CRC
2707 * mechanism doesn't look at P2P attributes.
2709 ifmgd
->beacon_crc_valid
= false;
2713 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2715 ifmgd
->beacon_crc
= ncrc
;
2716 ifmgd
->beacon_crc_valid
= true;
2718 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2720 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2721 elems
.wmm_param_len
))
2722 changed
|= BSS_CHANGED_QOS
;
2724 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2726 erp_value
= elems
.erp_info
[0];
2730 changed
|= ieee80211_handle_bss_capability(sdata
,
2731 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2732 erp_valid
, erp_value
);
2735 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2736 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2737 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2740 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2741 mgmt
->u
.probe_resp
.capab_info
&
2742 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2743 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
2745 elems
.country_elem_len
,
2746 elems
.pwr_constr_elem
);
2748 ieee80211_bss_info_change_notify(sdata
, changed
);
2751 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2752 struct sk_buff
*skb
)
2754 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2755 struct ieee80211_rx_status
*rx_status
;
2756 struct ieee80211_mgmt
*mgmt
;
2757 struct cfg80211_bss
*bss
= NULL
;
2758 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2761 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2762 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2763 fc
= le16_to_cpu(mgmt
->frame_control
);
2765 mutex_lock(&ifmgd
->mtx
);
2767 switch (fc
& IEEE80211_FCTL_STYPE
) {
2768 case IEEE80211_STYPE_BEACON
:
2769 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2771 case IEEE80211_STYPE_PROBE_RESP
:
2772 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2774 case IEEE80211_STYPE_AUTH
:
2775 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2777 case IEEE80211_STYPE_DEAUTH
:
2778 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2780 case IEEE80211_STYPE_DISASSOC
:
2781 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2783 case IEEE80211_STYPE_ASSOC_RESP
:
2784 case IEEE80211_STYPE_REASSOC_RESP
:
2785 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2787 case IEEE80211_STYPE_ACTION
:
2788 switch (mgmt
->u
.action
.category
) {
2789 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2790 ieee80211_sta_process_chanswitch(sdata
,
2791 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2792 (void *)ifmgd
->associated
->priv
,
2793 rx_status
->mactime
);
2797 mutex_unlock(&ifmgd
->mtx
);
2803 case RX_MGMT_CFG80211_DEAUTH
:
2804 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2806 case RX_MGMT_CFG80211_DISASSOC
:
2807 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2809 case RX_MGMT_CFG80211_RX_AUTH
:
2810 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2812 case RX_MGMT_CFG80211_RX_ASSOC
:
2813 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2815 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2816 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2819 WARN(1, "unexpected: %d", rma
);
2823 static void ieee80211_sta_timer(unsigned long data
)
2825 struct ieee80211_sub_if_data
*sdata
=
2826 (struct ieee80211_sub_if_data
*) data
;
2827 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2828 struct ieee80211_local
*local
= sdata
->local
;
2830 if (local
->quiescing
) {
2831 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2835 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2838 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2839 u8
*bssid
, u8 reason
)
2841 struct ieee80211_local
*local
= sdata
->local
;
2842 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2843 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2845 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2847 mutex_unlock(&ifmgd
->mtx
);
2850 * must be outside lock due to cfg80211,
2851 * but that's not a problem.
2853 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2855 mutex_lock(&local
->mtx
);
2856 ieee80211_recalc_idle(local
);
2857 mutex_unlock(&local
->mtx
);
2859 mutex_lock(&ifmgd
->mtx
);
2862 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2864 struct ieee80211_local
*local
= sdata
->local
;
2865 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2866 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2868 lockdep_assert_held(&ifmgd
->mtx
);
2870 if (WARN_ON_ONCE(!auth_data
))
2875 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2876 sdata_info(sdata
, "authentication with %pM timed out\n",
2877 auth_data
->bss
->bssid
);
2880 * Most likely AP is not in the range so remove the
2881 * bss struct for that AP.
2883 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2888 drv_mgd_prepare_tx(local
, sdata
);
2890 if (auth_data
->bss
->proberesp_ies
) {
2894 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2895 auth_data
->bss
->bssid
, auth_data
->tries
,
2896 IEEE80211_AUTH_MAX_TRIES
);
2898 auth_data
->expected_transaction
= 2;
2900 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
2901 trans
= auth_data
->sae_trans
;
2902 status
= auth_data
->sae_status
;
2903 auth_data
->expected_transaction
= trans
;
2906 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
2907 auth_data
->data
, auth_data
->data_len
,
2908 auth_data
->bss
->bssid
,
2909 auth_data
->bss
->bssid
, NULL
, 0, 0);
2913 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2914 auth_data
->bss
->bssid
, auth_data
->tries
,
2915 IEEE80211_AUTH_MAX_TRIES
);
2918 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2924 * Direct probe is sent to broadcast address as some APs
2925 * will not answer to direct packet in unassociated state.
2927 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2928 NULL
, 0, (u32
) -1, true, false,
2929 auth_data
->bss
->channel
, false);
2933 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2934 run_again(ifmgd
, auth_data
->timeout
);
2939 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2941 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2942 struct ieee80211_local
*local
= sdata
->local
;
2944 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2946 assoc_data
->tries
++;
2947 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2948 sdata_info(sdata
, "association with %pM timed out\n",
2949 assoc_data
->bss
->bssid
);
2952 * Most likely AP is not in the range so remove the
2953 * bss struct for that AP.
2955 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2960 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2961 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2962 IEEE80211_ASSOC_MAX_TRIES
);
2963 ieee80211_send_assoc(sdata
);
2965 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2966 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2971 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2973 struct ieee80211_local
*local
= sdata
->local
;
2974 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2976 mutex_lock(&ifmgd
->mtx
);
2978 if (ifmgd
->auth_data
&&
2979 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2980 if (ifmgd
->auth_data
->done
) {
2982 * ok ... we waited for assoc but userspace didn't,
2983 * so let's just kill the auth data
2985 ieee80211_destroy_auth_data(sdata
, false);
2986 } else if (ieee80211_probe_auth(sdata
)) {
2989 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2991 ieee80211_destroy_auth_data(sdata
, false);
2993 mutex_unlock(&ifmgd
->mtx
);
2994 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2995 mutex_lock(&ifmgd
->mtx
);
2997 } else if (ifmgd
->auth_data
)
2998 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3000 if (ifmgd
->assoc_data
&&
3001 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3002 if (!ifmgd
->assoc_data
->have_beacon
||
3003 ieee80211_do_assoc(sdata
)) {
3006 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3008 ieee80211_destroy_assoc_data(sdata
, false);
3010 mutex_unlock(&ifmgd
->mtx
);
3011 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3012 mutex_lock(&ifmgd
->mtx
);
3014 } else if (ifmgd
->assoc_data
)
3015 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3017 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3018 IEEE80211_STA_CONNECTION_POLL
) &&
3019 ifmgd
->associated
) {
3023 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3025 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3026 max_tries
= max_nullfunc_tries
;
3028 max_tries
= max_probe_tries
;
3030 /* ACK received for nullfunc probing frame */
3031 if (!ifmgd
->probe_send_count
)
3032 ieee80211_reset_ap_probe(sdata
);
3033 else if (ifmgd
->nullfunc_failed
) {
3034 if (ifmgd
->probe_send_count
< max_tries
) {
3036 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3037 bssid
, ifmgd
->probe_send_count
,
3039 ieee80211_mgd_probe_ap_send(sdata
);
3042 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3044 ieee80211_sta_connection_lost(sdata
, bssid
,
3045 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3047 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3048 run_again(ifmgd
, ifmgd
->probe_timeout
);
3049 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3051 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3052 bssid
, probe_wait_ms
);
3053 ieee80211_sta_connection_lost(sdata
, bssid
,
3054 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3055 } else if (ifmgd
->probe_send_count
< max_tries
) {
3057 "No probe response from AP %pM after %dms, try %d/%i\n",
3058 bssid
, probe_wait_ms
,
3059 ifmgd
->probe_send_count
, max_tries
);
3060 ieee80211_mgd_probe_ap_send(sdata
);
3063 * We actually lost the connection ... or did we?
3066 wiphy_debug(local
->hw
.wiphy
,
3067 "%s: No probe response from AP %pM"
3068 " after %dms, disconnecting.\n",
3070 bssid
, probe_wait_ms
);
3072 ieee80211_sta_connection_lost(sdata
, bssid
,
3073 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3077 mutex_unlock(&ifmgd
->mtx
);
3079 mutex_lock(&local
->mtx
);
3080 ieee80211_recalc_idle(local
);
3081 mutex_unlock(&local
->mtx
);
3084 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3086 struct ieee80211_sub_if_data
*sdata
=
3087 (struct ieee80211_sub_if_data
*) data
;
3088 struct ieee80211_local
*local
= sdata
->local
;
3090 if (local
->quiescing
)
3093 ieee80211_queue_work(&sdata
->local
->hw
,
3094 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3097 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3099 struct ieee80211_sub_if_data
*sdata
=
3100 (struct ieee80211_sub_if_data
*) data
;
3101 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3102 struct ieee80211_local
*local
= sdata
->local
;
3104 if (local
->quiescing
)
3107 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3110 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3112 struct ieee80211_sub_if_data
*sdata
=
3113 container_of(work
, struct ieee80211_sub_if_data
,
3114 u
.mgd
.monitor_work
);
3116 ieee80211_mgd_probe_ap(sdata
, false);
3119 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3123 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3124 __ieee80211_stop_poll(sdata
);
3126 /* let's probe the connection once */
3127 flags
= sdata
->local
->hw
.flags
;
3128 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3129 ieee80211_queue_work(&sdata
->local
->hw
,
3130 &sdata
->u
.mgd
.monitor_work
);
3131 /* and do all the other regular work too */
3132 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3137 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
3139 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3142 * we need to use atomic bitops for the running bits
3143 * only because both timers might fire at the same
3144 * time -- the code here is properly synchronised.
3147 cancel_work_sync(&ifmgd
->request_smps_work
);
3149 cancel_work_sync(&ifmgd
->monitor_work
);
3150 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3151 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3152 if (del_timer_sync(&ifmgd
->timer
))
3153 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3155 cancel_work_sync(&ifmgd
->chswitch_work
);
3156 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3157 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3159 /* these will just be re-established on connection */
3160 del_timer_sync(&ifmgd
->conn_mon_timer
);
3161 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3164 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3166 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3168 if (!ifmgd
->associated
)
3171 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3172 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3173 mutex_lock(&ifmgd
->mtx
);
3174 if (ifmgd
->associated
) {
3176 "driver requested disconnect after resume\n");
3177 ieee80211_sta_connection_lost(sdata
,
3178 ifmgd
->associated
->bssid
,
3179 WLAN_REASON_UNSPECIFIED
);
3180 mutex_unlock(&ifmgd
->mtx
);
3183 mutex_unlock(&ifmgd
->mtx
);
3186 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3187 add_timer(&ifmgd
->timer
);
3188 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3189 add_timer(&ifmgd
->chswitch_timer
);
3190 ieee80211_sta_reset_beacon_monitor(sdata
);
3192 mutex_lock(&sdata
->local
->mtx
);
3193 ieee80211_restart_sta_timer(sdata
);
3194 mutex_unlock(&sdata
->local
->mtx
);
3198 /* interface setup */
3199 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3201 struct ieee80211_if_managed
*ifmgd
;
3203 ifmgd
= &sdata
->u
.mgd
;
3204 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3205 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3206 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3207 ieee80211_beacon_connection_loss_work
);
3208 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3209 ieee80211_csa_connection_drop_work
);
3210 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3211 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3212 (unsigned long) sdata
);
3213 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3214 (unsigned long) sdata
);
3215 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3216 (unsigned long) sdata
);
3217 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3218 (unsigned long) sdata
);
3221 ifmgd
->powersave
= sdata
->wdev
.ps
;
3222 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3223 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3225 mutex_init(&ifmgd
->mtx
);
3227 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3228 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3230 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3233 /* scan finished notification */
3234 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3236 struct ieee80211_sub_if_data
*sdata
;
3238 /* Restart STA timers */
3240 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3241 ieee80211_restart_sta_timer(sdata
);
3245 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3246 unsigned long data
, void *dummy
)
3248 s32 latency_usec
= (s32
) data
;
3249 struct ieee80211_local
*local
=
3250 container_of(nb
, struct ieee80211_local
,
3251 network_latency_notifier
);
3253 mutex_lock(&local
->iflist_mtx
);
3254 ieee80211_recalc_ps(local
, latency_usec
);
3255 mutex_unlock(&local
->iflist_mtx
);
3260 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
3266 case NL80211_CHAN_WIDTH_20
:
3267 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3268 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3270 case NL80211_CHAN_WIDTH_40
:
3271 c
->width
= NL80211_CHAN_WIDTH_20
;
3272 c
->center_freq1
= c
->chan
->center_freq
;
3273 ret
= IEEE80211_STA_DISABLE_40MHZ
|
3274 IEEE80211_STA_DISABLE_VHT
;
3276 case NL80211_CHAN_WIDTH_80
:
3277 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3281 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
3282 c
->width
= NL80211_CHAN_WIDTH_40
;
3283 ret
= IEEE80211_STA_DISABLE_VHT
;
3285 case NL80211_CHAN_WIDTH_80P80
:
3286 c
->center_freq2
= 0;
3287 c
->width
= NL80211_CHAN_WIDTH_80
;
3288 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3289 IEEE80211_STA_DISABLE_160MHZ
;
3291 case NL80211_CHAN_WIDTH_160
:
3293 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3296 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
3297 c
->width
= NL80211_CHAN_WIDTH_80
;
3298 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3299 IEEE80211_STA_DISABLE_160MHZ
;
3302 case NL80211_CHAN_WIDTH_20_NOHT
:
3304 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3305 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3309 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
3315 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
3316 struct ieee80211_supported_band
*sband
,
3317 struct ieee80211_channel
*channel
,
3318 const struct ieee80211_ht_operation
*ht_oper
,
3319 const struct ieee80211_vht_operation
*vht_oper
,
3320 struct cfg80211_chan_def
*chandef
)
3322 struct cfg80211_chan_def vht_chandef
;
3325 chandef
->chan
= channel
;
3326 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3327 chandef
->center_freq1
= channel
->center_freq
;
3328 chandef
->center_freq2
= 0;
3330 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
3331 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3335 chandef
->width
= NL80211_CHAN_WIDTH_20
;
3337 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3339 /* check that channel matches the right operating channel */
3340 if (channel
->center_freq
!= ht_cfreq
) {
3342 * It's possible that some APs are confused here;
3343 * Netgear WNDR3700 sometimes reports 4 higher than
3344 * the actual channel in association responses, but
3345 * since we look at probe response/beacon data here
3349 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3350 channel
->center_freq
, ht_cfreq
,
3351 ht_oper
->primary_chan
, channel
->band
);
3352 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3356 /* check 40 MHz support, if we have it */
3357 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3358 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3359 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3360 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3361 chandef
->center_freq1
+= 10;
3363 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3364 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3365 chandef
->center_freq1
-= 10;
3369 /* 40 MHz (and 80 MHz) must be supported for VHT */
3370 ret
= IEEE80211_STA_DISABLE_VHT
;
3374 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
3375 ret
= IEEE80211_STA_DISABLE_VHT
;
3379 vht_chandef
.chan
= channel
;
3380 vht_chandef
.center_freq1
=
3381 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
3383 vht_chandef
.center_freq2
= 0;
3385 if (vht_oper
->center_freq_seg2_idx
)
3386 vht_chandef
.center_freq2
=
3387 ieee80211_channel_to_frequency(
3388 vht_oper
->center_freq_seg2_idx
,
3391 switch (vht_oper
->chan_width
) {
3392 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
3393 vht_chandef
.width
= chandef
->width
;
3395 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
3396 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
3398 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
3399 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
3401 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
3402 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
3406 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3407 vht_oper
->chan_width
);
3408 ret
= IEEE80211_STA_DISABLE_VHT
;
3412 if (!cfg80211_chandef_valid(&vht_chandef
)) {
3414 "AP VHT information is invalid, disable VHT\n");
3415 ret
= IEEE80211_STA_DISABLE_VHT
;
3419 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
3424 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
3426 "AP VHT information doesn't match HT, disable VHT\n");
3427 ret
= IEEE80211_STA_DISABLE_VHT
;
3431 *chandef
= vht_chandef
;
3435 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
3436 IEEE80211_CHAN_DISABLED
)) {
3437 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
3438 ret
= IEEE80211_STA_DISABLE_HT
|
3439 IEEE80211_STA_DISABLE_VHT
;
3443 ret
= chandef_downgrade(chandef
);
3446 if (chandef
->width
!= vht_chandef
.width
)
3448 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3451 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
3455 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3456 struct cfg80211_bss
*cbss
)
3458 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3459 const u8
*ht_cap_ie
, *vht_cap_ie
;
3460 const struct ieee80211_ht_cap
*ht_cap
;
3461 const struct ieee80211_vht_cap
*vht_cap
;
3464 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3467 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3468 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3469 ht_cap
= (void *)(ht_cap_ie
+ 2);
3470 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3472 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3473 * "Tx Unequal Modulation Supported" fields.
3477 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3480 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3481 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3485 vht_cap
= (void *)(vht_cap_ie
+ 2);
3486 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3487 for (nss
= 8; nss
> 0; nss
--) {
3488 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3489 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3492 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3493 chains
= max(chains
, nss
);
3499 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3500 struct cfg80211_bss
*cbss
)
3502 struct ieee80211_local
*local
= sdata
->local
;
3503 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3504 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3505 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3506 struct ieee80211_supported_band
*sband
;
3507 struct cfg80211_chan_def chandef
;
3510 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3512 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3513 IEEE80211_STA_DISABLE_80P80MHZ
|
3514 IEEE80211_STA_DISABLE_160MHZ
);
3518 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3519 sband
->ht_cap
.ht_supported
) {
3520 const u8
*ht_oper_ie
;
3522 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3523 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3524 ht_oper
= (void *)(ht_oper_ie
+ 2);
3527 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3528 sband
->vht_cap
.vht_supported
) {
3529 const u8
*vht_oper_ie
;
3531 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3532 WLAN_EID_VHT_OPERATION
);
3533 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3534 vht_oper
= (void *)(vht_oper_ie
+ 2);
3535 if (vht_oper
&& !ht_oper
) {
3538 "AP advertised VHT without HT, disabling both\n");
3539 sdata
->flags
|= IEEE80211_STA_DISABLE_HT
;
3540 sdata
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3544 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3549 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3554 /* will change later if needed */
3555 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3558 * If this fails (possibly due to channel context sharing
3559 * on incompatible channels, e.g. 80+80 and 160 sharing the
3560 * same control channel) try to use a smaller bandwidth.
3562 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3563 IEEE80211_CHANCTX_SHARED
);
3564 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
)
3565 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3569 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3570 struct cfg80211_bss
*cbss
, bool assoc
)
3572 struct ieee80211_local
*local
= sdata
->local
;
3573 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3574 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3575 struct sta_info
*new_sta
= NULL
;
3576 bool have_sta
= false;
3579 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3584 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3589 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3594 mutex_lock(&local
->mtx
);
3595 ieee80211_recalc_idle(sdata
->local
);
3596 mutex_unlock(&local
->mtx
);
3599 u32 rates
= 0, basic_rates
= 0;
3600 bool have_higher_than_11mbit
;
3601 int min_rate
= INT_MAX
, min_rate_index
= -1;
3602 struct ieee80211_supported_band
*sband
;
3604 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3606 err
= ieee80211_prep_channel(sdata
, cbss
);
3608 sta_info_free(local
, new_sta
);
3612 ieee80211_get_rates(sband
, bss
->supp_rates
,
3613 bss
->supp_rates_len
,
3614 &rates
, &basic_rates
,
3615 &have_higher_than_11mbit
,
3616 &min_rate
, &min_rate_index
);
3619 * This used to be a workaround for basic rates missing
3620 * in the association response frame. Now that we no
3621 * longer use the basic rates from there, it probably
3622 * doesn't happen any more, but keep the workaround so
3623 * in case some *other* APs are buggy in different ways
3624 * we can connect -- with a warning.
3626 if (!basic_rates
&& min_rate_index
>= 0) {
3628 "No basic rates, using min rate instead\n");
3629 basic_rates
= BIT(min_rate_index
);
3632 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3633 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3635 /* cf. IEEE 802.11 9.2.12 */
3636 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3637 have_higher_than_11mbit
)
3638 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3640 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3642 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3644 /* set timing information */
3645 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3646 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3647 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3649 /* tell driver about BSSID, basic rates and timing */
3650 ieee80211_bss_info_change_notify(sdata
,
3651 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3652 BSS_CHANGED_BEACON_INT
);
3655 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3657 err
= sta_info_insert(new_sta
);
3661 "failed to insert STA entry for the AP (error %d)\n",
3666 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3672 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3673 struct cfg80211_auth_request
*req
)
3675 struct ieee80211_local
*local
= sdata
->local
;
3676 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3677 struct ieee80211_mgd_auth_data
*auth_data
;
3681 /* prepare auth data structure */
3683 switch (req
->auth_type
) {
3684 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3685 auth_alg
= WLAN_AUTH_OPEN
;
3687 case NL80211_AUTHTYPE_SHARED_KEY
:
3688 if (IS_ERR(local
->wep_tx_tfm
))
3690 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3692 case NL80211_AUTHTYPE_FT
:
3693 auth_alg
= WLAN_AUTH_FT
;
3695 case NL80211_AUTHTYPE_NETWORK_EAP
:
3696 auth_alg
= WLAN_AUTH_LEAP
;
3698 case NL80211_AUTHTYPE_SAE
:
3699 auth_alg
= WLAN_AUTH_SAE
;
3705 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3706 req
->ie_len
, GFP_KERNEL
);
3710 auth_data
->bss
= req
->bss
;
3712 if (req
->sae_data_len
>= 4) {
3713 __le16
*pos
= (__le16
*) req
->sae_data
;
3714 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3715 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3716 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3717 req
->sae_data_len
- 4);
3718 auth_data
->data_len
+= req
->sae_data_len
- 4;
3721 if (req
->ie
&& req
->ie_len
) {
3722 memcpy(&auth_data
->data
[auth_data
->data_len
],
3723 req
->ie
, req
->ie_len
);
3724 auth_data
->data_len
+= req
->ie_len
;
3727 if (req
->key
&& req
->key_len
) {
3728 auth_data
->key_len
= req
->key_len
;
3729 auth_data
->key_idx
= req
->key_idx
;
3730 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3733 auth_data
->algorithm
= auth_alg
;
3735 /* try to authenticate/probe */
3737 mutex_lock(&ifmgd
->mtx
);
3739 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3740 ifmgd
->assoc_data
) {
3745 if (ifmgd
->auth_data
)
3746 ieee80211_destroy_auth_data(sdata
, false);
3748 /* prep auth_data so we don't go into idle on disassoc */
3749 ifmgd
->auth_data
= auth_data
;
3751 if (ifmgd
->associated
)
3752 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3754 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3756 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3760 err
= ieee80211_probe_auth(sdata
);
3762 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3766 /* hold our own reference */
3767 cfg80211_ref_bss(auth_data
->bss
);
3772 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3773 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3774 ifmgd
->auth_data
= NULL
;
3778 mutex_unlock(&ifmgd
->mtx
);
3783 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3784 struct cfg80211_assoc_request
*req
)
3786 struct ieee80211_local
*local
= sdata
->local
;
3787 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3788 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3789 struct ieee80211_mgd_assoc_data
*assoc_data
;
3790 struct ieee80211_supported_band
*sband
;
3791 const u8
*ssidie
, *ht_ie
, *vht_ie
;
3794 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3799 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3805 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3806 assoc_data
->ssid_len
= ssidie
[1];
3809 mutex_lock(&ifmgd
->mtx
);
3811 if (ifmgd
->associated
)
3812 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3814 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3819 if (ifmgd
->assoc_data
) {
3824 if (ifmgd
->auth_data
) {
3827 /* keep sta info, bssid if matching */
3828 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3829 ieee80211_destroy_auth_data(sdata
, match
);
3832 /* prepare assoc data */
3834 ifmgd
->beacon_crc_valid
= false;
3837 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3838 * We still associate in non-HT mode (11a/b/g) if any one of these
3839 * ciphers is configured as pairwise.
3840 * We can set this to true for non-11n hardware, that'll be checked
3841 * separately along with the peer capabilities.
3843 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3844 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3845 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3846 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3847 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3848 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3849 netdev_info(sdata
->dev
,
3850 "disabling HT/VHT due to WEP/TKIP use\n");
3854 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3855 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3856 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3859 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3860 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3861 if (!sband
->ht_cap
.ht_supported
||
3862 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3863 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3865 netdev_info(sdata
->dev
,
3866 "disabling HT as WMM/QoS is not supported by the AP\n");
3869 /* disable VHT if we don't support it or the AP doesn't use WMM */
3870 if (!sband
->vht_cap
.vht_supported
||
3871 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3872 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3874 netdev_info(sdata
->dev
,
3875 "disabling VHT as WMM/QoS is not supported by the AP\n");
3878 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3879 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3880 sizeof(ifmgd
->ht_capa_mask
));
3882 if (req
->ie
&& req
->ie_len
) {
3883 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3884 assoc_data
->ie_len
= req
->ie_len
;
3887 assoc_data
->bss
= req
->bss
;
3889 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3890 if (ifmgd
->powersave
)
3891 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3893 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3895 sdata
->smps_mode
= ifmgd
->req_smps
;
3897 assoc_data
->capability
= req
->bss
->capability
;
3898 assoc_data
->wmm
= bss
->wmm_used
&&
3899 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3900 assoc_data
->supp_rates
= bss
->supp_rates
;
3901 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3904 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3905 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3906 assoc_data
->ap_ht_param
=
3907 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3909 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3910 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
3911 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
3912 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
3913 sizeof(struct ieee80211_vht_cap
));
3915 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3918 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3919 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3920 assoc_data
->uapsd
= true;
3921 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3923 assoc_data
->uapsd
= false;
3924 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3927 if (req
->prev_bssid
)
3928 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3931 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3932 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3934 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3935 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3938 if (req
->crypto
.control_port
)
3939 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3941 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3943 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3944 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3946 /* kick off associate process */
3948 ifmgd
->assoc_data
= assoc_data
;
3949 ifmgd
->dtim_period
= 0;
3951 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3955 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3956 const struct cfg80211_bss_ies
*beacon_ies
;
3959 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
3962 * Wait up to one beacon interval ...
3963 * should this be more if we miss one?
3965 sdata_info(sdata
, "waiting for beacon from %pM\n",
3967 assoc_data
->timeout
=
3968 TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3970 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3973 if (tim_ie
&& tim_ie
[1] >=
3974 sizeof(struct ieee80211_tim_ie
)) {
3975 const struct ieee80211_tim_ie
*tim
;
3976 tim
= (void *)(tim_ie
+ 2);
3977 ifmgd
->dtim_period
= tim
->dtim_period
;
3979 assoc_data
->have_beacon
= true;
3980 assoc_data
->sent_assoc
= false;
3981 assoc_data
->timeout
= jiffies
;
3985 assoc_data
->have_beacon
= true;
3986 assoc_data
->sent_assoc
= false;
3987 assoc_data
->timeout
= jiffies
;
3989 run_again(ifmgd
, assoc_data
->timeout
);
3991 if (bss
->corrupt_data
) {
3992 char *corrupt_type
= "data";
3993 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3994 if (bss
->corrupt_data
&
3995 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3996 corrupt_type
= "beacon and probe response";
3998 corrupt_type
= "beacon";
3999 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4000 corrupt_type
= "probe response";
4001 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4008 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4009 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4010 ifmgd
->assoc_data
= NULL
;
4014 mutex_unlock(&ifmgd
->mtx
);
4019 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4020 struct cfg80211_deauth_request
*req
)
4022 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4023 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4024 bool tx
= !req
->local_state_change
;
4025 bool sent_frame
= false;
4027 mutex_lock(&ifmgd
->mtx
);
4030 "deauthenticating from %pM by local choice (reason=%d)\n",
4031 req
->bssid
, req
->reason_code
);
4033 if (ifmgd
->auth_data
) {
4034 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4035 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4036 IEEE80211_STYPE_DEAUTH
,
4037 req
->reason_code
, tx
,
4039 ieee80211_destroy_auth_data(sdata
, false);
4040 mutex_unlock(&ifmgd
->mtx
);
4046 if (ifmgd
->associated
&&
4047 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4048 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4049 req
->reason_code
, tx
, frame_buf
);
4052 mutex_unlock(&ifmgd
->mtx
);
4055 mutex_lock(&sdata
->local
->mtx
);
4056 ieee80211_recalc_idle(sdata
->local
);
4057 mutex_unlock(&sdata
->local
->mtx
);
4060 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4061 IEEE80211_DEAUTH_FRAME_LEN
);
4066 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4067 struct cfg80211_disassoc_request
*req
)
4069 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4071 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4073 mutex_lock(&ifmgd
->mtx
);
4076 * cfg80211 should catch this ... but it's racy since
4077 * we can receive a disassoc frame, process it, hand it
4078 * to cfg80211 while that's in a locked section already
4079 * trying to tell us that the user wants to disconnect.
4081 if (ifmgd
->associated
!= req
->bss
) {
4082 mutex_unlock(&ifmgd
->mtx
);
4087 "disassociating from %pM by local choice (reason=%d)\n",
4088 req
->bss
->bssid
, req
->reason_code
);
4090 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4091 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4092 req
->reason_code
, !req
->local_state_change
,
4094 mutex_unlock(&ifmgd
->mtx
);
4096 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4097 IEEE80211_DEAUTH_FRAME_LEN
);
4099 mutex_lock(&sdata
->local
->mtx
);
4100 ieee80211_recalc_idle(sdata
->local
);
4101 mutex_unlock(&sdata
->local
->mtx
);
4106 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4108 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4110 mutex_lock(&ifmgd
->mtx
);
4111 if (ifmgd
->assoc_data
)
4112 ieee80211_destroy_assoc_data(sdata
, false);
4113 if (ifmgd
->auth_data
)
4114 ieee80211_destroy_auth_data(sdata
, false);
4115 del_timer_sync(&ifmgd
->timer
);
4116 mutex_unlock(&ifmgd
->mtx
);
4119 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4120 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4123 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4125 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4127 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4129 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);