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_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
41 static int max_nullfunc_tries
= 2;
42 module_param(max_nullfunc_tries
, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries
,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
46 static int max_probe_tries
= 5;
47 module_param(max_probe_tries
, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries
,
49 "Maximum probe tries before disconnecting (reason 4).");
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
59 #define IEEE80211_BEACON_LOSS_COUNT 7
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
65 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
71 static int probe_wait_ms
= 500;
72 module_param(probe_wait_ms
, int, 0644);
73 MODULE_PARM_DESC(probe_wait_ms
,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
82 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 #define TMR_RUNNING_TIMER 0
91 #define TMR_RUNNING_CHANSW 1
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
122 lockdep_assert_held(&ifmgd
->mtx
);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
137 ASSERT_MGD_MTX(ifmgd
);
139 if (!timer_pending(&ifmgd
->timer
) ||
140 time_before(timeout
, ifmgd
->timer
.expires
))
141 mod_timer(&ifmgd
->timer
, timeout
);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
146 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
149 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
152 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
153 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
156 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
160 if (unlikely(!sdata
->u
.mgd
.associated
))
163 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
166 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
167 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
169 ifmgd
->probe_send_count
= 0;
172 static int ecw2cw(int ecw
)
174 return (1 << ecw
) - 1;
177 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
178 struct ieee80211_ht_operation
*ht_oper
,
179 const u8
*bssid
, bool reconfig
)
181 struct ieee80211_local
*local
= sdata
->local
;
182 struct ieee80211_supported_band
*sband
;
183 struct ieee80211_chanctx_conf
*chanctx_conf
;
184 struct ieee80211_channel
*chan
;
185 struct sta_info
*sta
;
188 bool disable_40
= false;
191 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
192 if (WARN_ON(!chanctx_conf
)) {
196 chan
= chanctx_conf
->def
.chan
;
198 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
200 switch (sdata
->vif
.bss_conf
.chandef
.width
) {
201 case NL80211_CHAN_WIDTH_40
:
202 if (sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
>
203 sdata
->vif
.bss_conf
.chandef
.center_freq1
&&
204 chan
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
206 if (sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
<
207 sdata
->vif
.bss_conf
.chandef
.center_freq1
&&
208 chan
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
215 /* This can change during the lifetime of the BSS */
216 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
219 mutex_lock(&local
->sta_mtx
);
220 sta
= sta_info_get(sdata
, bssid
);
222 if (WARN_ON_ONCE(!sta
)) {
223 mutex_unlock(&local
->sta_mtx
);
227 if (!(sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
231 disable_40
!= (sta
->sta
.bandwidth
< IEEE80211_STA_RX_BW_40
)) {
233 sta
->sta
.bandwidth
= IEEE80211_STA_RX_BW_20
;
235 sta
->sta
.bandwidth
= ieee80211_sta_cur_vht_bw(sta
);
237 rate_control_rate_update(local
, sband
, sta
,
238 IEEE80211_RC_BW_CHANGED
);
240 mutex_unlock(&local
->sta_mtx
);
242 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
244 /* if bss configuration changed store the new one */
245 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
246 changed
|= BSS_CHANGED_HT
;
247 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
253 /* frame sending functions */
255 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
256 struct ieee80211_supported_band
*sband
,
262 for (i
= 0; i
< supp_rates_len
; i
++) {
263 int rate
= (supp_rates
[i
] & 0x7F) * 5;
265 for (j
= 0; j
< sband
->n_bitrates
; j
++)
266 if (sband
->bitrates
[j
].bitrate
== rate
) {
276 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
277 struct sk_buff
*skb
, u8 ap_ht_param
,
278 struct ieee80211_supported_band
*sband
,
279 struct ieee80211_channel
*channel
,
280 enum ieee80211_smps_mode smps
)
283 u32 flags
= channel
->flags
;
285 struct ieee80211_sta_ht_cap ht_cap
;
287 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
289 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
290 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
292 /* determine capability flags */
295 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
296 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
297 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
298 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
299 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
302 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
303 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
304 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
305 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
311 * If 40 MHz was disabled associate as though we weren't
312 * capable of 40 MHz -- some broken APs will never fall
313 * back to trying to transmit in 20 MHz.
315 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
316 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
317 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
320 /* set SM PS mode properly */
321 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
323 case IEEE80211_SMPS_AUTOMATIC
:
324 case IEEE80211_SMPS_NUM_MODES
:
326 case IEEE80211_SMPS_OFF
:
327 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
328 IEEE80211_HT_CAP_SM_PS_SHIFT
;
330 case IEEE80211_SMPS_STATIC
:
331 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
332 IEEE80211_HT_CAP_SM_PS_SHIFT
;
334 case IEEE80211_SMPS_DYNAMIC
:
335 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
336 IEEE80211_HT_CAP_SM_PS_SHIFT
;
340 /* reserve and fill IE */
341 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
342 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
345 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
347 struct ieee80211_supported_band
*sband
,
348 struct ieee80211_vht_cap
*ap_vht_cap
)
352 struct ieee80211_sta_vht_cap vht_cap
;
355 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
357 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
359 /* determine capability flags */
362 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
363 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
364 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
367 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
368 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
369 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
373 * Some APs apparently get confused if our capabilities are better
374 * than theirs, so restrict what we advertise in the assoc request.
376 if (!(ap_vht_cap
->vht_cap_info
&
377 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
378 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
380 if (!(ap_vht_cap
->vht_cap_info
&
381 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC
)))
382 cap
&= ~(IEEE80211_VHT_CAP_RXSTBC_1
|
383 IEEE80211_VHT_CAP_RXSTBC_3
|
384 IEEE80211_VHT_CAP_RXSTBC_4
);
386 for (i
= 0; i
< 8; i
++) {
388 u16 mask
= IEEE80211_VHT_MCS_NOT_SUPPORTED
<< shift
;
391 ap_mcs
= (le16_to_cpu(ap_vht_cap
->supp_mcs
.tx_mcs_map
) &
393 our_mcs
= (le16_to_cpu(vht_cap
.vht_mcs
.rx_mcs_map
) &
398 if (our_mcs
<= ap_mcs
)
401 case IEEE80211_VHT_MCS_NOT_SUPPORTED
:
402 vht_cap
.vht_mcs
.rx_mcs_map
&= cpu_to_le16(~mask
);
403 vht_cap
.vht_mcs
.rx_mcs_map
|=
404 cpu_to_le16(ap_mcs
<< shift
);
408 /* reserve and fill IE */
409 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
410 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
413 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
415 struct ieee80211_local
*local
= sdata
->local
;
416 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
417 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
419 struct ieee80211_mgmt
*mgmt
;
421 size_t offset
= 0, noffset
;
422 int i
, count
, rates_len
, supp_rates_len
;
424 struct ieee80211_supported_band
*sband
;
425 struct ieee80211_chanctx_conf
*chanctx_conf
;
426 struct ieee80211_channel
*chan
;
429 lockdep_assert_held(&ifmgd
->mtx
);
432 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
433 if (WARN_ON(!chanctx_conf
)) {
437 chan
= chanctx_conf
->def
.chan
;
439 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
441 if (assoc_data
->supp_rates_len
) {
443 * Get all rates supported by the device and the AP as
444 * some APs don't like getting a superset of their rates
445 * in the association request (e.g. D-Link DAP 1353 in
448 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
449 assoc_data
->supp_rates_len
,
453 * In case AP not provide any supported rates information
454 * before association, we send information element(s) with
455 * all rates that we support.
458 rates_len
= sband
->n_bitrates
;
461 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
462 sizeof(*mgmt
) + /* bit too much but doesn't matter */
463 2 + assoc_data
->ssid_len
+ /* SSID */
464 4 + rates_len
+ /* (extended) rates */
465 4 + /* power capability */
466 2 + 2 * sband
->n_channels
+ /* supported channels */
467 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
468 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
469 assoc_data
->ie_len
+ /* extra IEs */
475 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
477 capab
= WLAN_CAPABILITY_ESS
;
479 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
480 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
481 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
482 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
483 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
486 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
487 capab
|= WLAN_CAPABILITY_PRIVACY
;
489 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
490 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
491 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
493 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
495 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
496 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
497 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
499 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
501 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
502 IEEE80211_STYPE_REASSOC_REQ
);
503 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
504 mgmt
->u
.reassoc_req
.listen_interval
=
505 cpu_to_le16(local
->hw
.conf
.listen_interval
);
506 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
510 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
511 IEEE80211_STYPE_ASSOC_REQ
);
512 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
513 mgmt
->u
.assoc_req
.listen_interval
=
514 cpu_to_le16(local
->hw
.conf
.listen_interval
);
518 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
519 *pos
++ = WLAN_EID_SSID
;
520 *pos
++ = assoc_data
->ssid_len
;
521 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
523 /* add all rates which were marked to be used above */
524 supp_rates_len
= rates_len
;
525 if (supp_rates_len
> 8)
528 pos
= skb_put(skb
, supp_rates_len
+ 2);
529 *pos
++ = WLAN_EID_SUPP_RATES
;
530 *pos
++ = supp_rates_len
;
533 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
534 if (BIT(i
) & rates
) {
535 int rate
= sband
->bitrates
[i
].bitrate
;
536 *pos
++ = (u8
) (rate
/ 5);
542 if (rates_len
> count
) {
543 pos
= skb_put(skb
, rates_len
- count
+ 2);
544 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
545 *pos
++ = rates_len
- count
;
547 for (i
++; i
< sband
->n_bitrates
; i
++) {
548 if (BIT(i
) & rates
) {
549 int rate
= sband
->bitrates
[i
].bitrate
;
550 *pos
++ = (u8
) (rate
/ 5);
555 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
556 /* 1. power capabilities */
557 pos
= skb_put(skb
, 4);
558 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
560 *pos
++ = 0; /* min tx power */
561 *pos
++ = chan
->max_power
; /* max tx power */
563 /* 2. supported channels */
564 /* TODO: get this in reg domain format */
565 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
566 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
567 *pos
++ = 2 * sband
->n_channels
;
568 for (i
= 0; i
< sband
->n_channels
; i
++) {
569 *pos
++ = ieee80211_frequency_to_channel(
570 sband
->channels
[i
].center_freq
);
571 *pos
++ = 1; /* one channel in the subband*/
575 /* if present, add any custom IEs that go before HT */
576 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
577 static const u8 before_ht
[] = {
580 WLAN_EID_EXT_SUPP_RATES
,
581 WLAN_EID_PWR_CAPABILITY
,
582 WLAN_EID_SUPPORTED_CHANNELS
,
585 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
586 WLAN_EID_MOBILITY_DOMAIN
,
587 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
589 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
590 before_ht
, ARRAY_SIZE(before_ht
),
592 pos
= skb_put(skb
, noffset
- offset
);
593 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
597 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
598 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
599 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
601 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
602 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
603 sband
, chan
, sdata
->smps_mode
);
605 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
606 ieee80211_add_vht_ie(sdata
, skb
, sband
,
607 &assoc_data
->ap_vht_cap
);
609 /* if present, add any custom non-vendor IEs that go after HT */
610 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
611 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
614 pos
= skb_put(skb
, noffset
- offset
);
615 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
619 if (assoc_data
->wmm
) {
620 if (assoc_data
->uapsd
) {
621 qos_info
= ifmgd
->uapsd_queues
;
622 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
623 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
628 pos
= skb_put(skb
, 9);
629 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
630 *pos
++ = 7; /* len */
631 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
634 *pos
++ = 2; /* WME */
635 *pos
++ = 0; /* WME info */
636 *pos
++ = 1; /* WME ver */
640 /* add any remaining custom (i.e. vendor specific here) IEs */
641 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
642 noffset
= assoc_data
->ie_len
;
643 pos
= skb_put(skb
, noffset
- offset
);
644 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
647 drv_mgd_prepare_tx(local
, sdata
);
649 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
650 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
651 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
652 IEEE80211_TX_INTFL_MLME_CONN_TX
;
653 ieee80211_tx_skb(sdata
, skb
);
656 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
657 struct ieee80211_sub_if_data
*sdata
)
659 struct ieee80211_pspoll
*pspoll
;
662 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
666 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
667 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
669 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
670 ieee80211_tx_skb(sdata
, skb
);
673 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
674 struct ieee80211_sub_if_data
*sdata
,
678 struct ieee80211_hdr_3addr
*nullfunc
;
679 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
681 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
685 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
687 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
689 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
690 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
691 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
692 IEEE80211_STA_CONNECTION_POLL
))
693 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
695 ieee80211_tx_skb(sdata
, skb
);
698 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
699 struct ieee80211_sub_if_data
*sdata
)
702 struct ieee80211_hdr
*nullfunc
;
705 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
708 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
712 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
714 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
715 memset(nullfunc
, 0, 30);
716 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
717 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
718 nullfunc
->frame_control
= fc
;
719 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
720 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
721 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
722 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
724 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
725 ieee80211_tx_skb(sdata
, skb
);
728 /* spectrum management related things */
729 static void ieee80211_chswitch_work(struct work_struct
*work
)
731 struct ieee80211_sub_if_data
*sdata
=
732 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
733 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
735 if (!ieee80211_sdata_running(sdata
))
738 mutex_lock(&ifmgd
->mtx
);
739 if (!ifmgd
->associated
)
742 sdata
->local
->_oper_channel
= sdata
->local
->csa_channel
;
743 if (!sdata
->local
->ops
->channel_switch
) {
744 /* call "hw_config" only if doing sw channel switch */
745 ieee80211_hw_config(sdata
->local
,
746 IEEE80211_CONF_CHANGE_CHANNEL
);
748 /* update the device channel directly */
749 sdata
->local
->hw
.conf
.channel
= sdata
->local
->_oper_channel
;
752 /* XXX: shouldn't really modify cfg80211-owned data! */
753 ifmgd
->associated
->channel
= sdata
->local
->_oper_channel
;
755 /* XXX: wait for a beacon first? */
756 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
757 IEEE80211_QUEUE_STOP_REASON_CSA
);
759 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
760 mutex_unlock(&ifmgd
->mtx
);
763 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
765 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
766 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
768 trace_api_chswitch_done(sdata
, success
);
771 "driver channel switch failed, disconnecting\n");
772 ieee80211_queue_work(&sdata
->local
->hw
,
773 &ifmgd
->csa_connection_drop_work
);
775 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
778 EXPORT_SYMBOL(ieee80211_chswitch_done
);
780 static void ieee80211_chswitch_timer(unsigned long data
)
782 struct ieee80211_sub_if_data
*sdata
=
783 (struct ieee80211_sub_if_data
*) data
;
784 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
786 if (sdata
->local
->quiescing
) {
787 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
791 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
794 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
795 struct ieee80211_channel_sw_ie
*sw_elem
,
796 struct ieee80211_bss
*bss
,
799 struct cfg80211_bss
*cbss
=
800 container_of((void *)bss
, struct cfg80211_bss
, priv
);
801 struct ieee80211_channel
*new_ch
;
802 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
803 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
804 cbss
->channel
->band
);
805 struct ieee80211_chanctx
*chanctx
;
807 ASSERT_MGD_MTX(ifmgd
);
809 if (!ifmgd
->associated
)
812 if (sdata
->local
->scanning
)
815 /* Disregard subsequent beacons if we are already running a timer
818 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
821 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
822 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
824 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
825 ifmgd
->associated
->bssid
, new_freq
);
826 ieee80211_queue_work(&sdata
->local
->hw
,
827 &ifmgd
->csa_connection_drop_work
);
831 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
833 if (sdata
->local
->use_chanctx
) {
835 "not handling channel switch with channel contexts\n");
836 ieee80211_queue_work(&sdata
->local
->hw
,
837 &ifmgd
->csa_connection_drop_work
);
841 mutex_lock(&sdata
->local
->chanctx_mtx
);
842 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
843 mutex_unlock(&sdata
->local
->chanctx_mtx
);
846 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
847 struct ieee80211_chanctx
, conf
);
848 if (chanctx
->refcount
> 1) {
850 "channel switch with multiple interfaces on the same channel, disconnecting\n");
851 ieee80211_queue_work(&sdata
->local
->hw
,
852 &ifmgd
->csa_connection_drop_work
);
853 mutex_unlock(&sdata
->local
->chanctx_mtx
);
856 mutex_unlock(&sdata
->local
->chanctx_mtx
);
858 sdata
->local
->csa_channel
= new_ch
;
861 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
862 IEEE80211_QUEUE_STOP_REASON_CSA
);
864 if (sdata
->local
->ops
->channel_switch
) {
865 /* use driver's channel switch callback */
866 struct ieee80211_channel_switch ch_switch
= {
867 .timestamp
= timestamp
,
868 .block_tx
= sw_elem
->mode
,
870 .count
= sw_elem
->count
,
873 drv_channel_switch(sdata
->local
, &ch_switch
);
877 /* channel switch handled in software */
878 if (sw_elem
->count
<= 1)
879 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
881 mod_timer(&ifmgd
->chswitch_timer
,
882 TU_TO_EXP_TIME(sw_elem
->count
*
883 cbss
->beacon_interval
));
886 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
887 struct ieee80211_channel
*channel
,
888 const u8
*country_ie
, u8 country_ie_len
,
889 const u8
*pwr_constr_elem
)
891 struct ieee80211_country_ie_triplet
*triplet
;
892 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
893 int i
, chan_pwr
, chan_increment
, new_ap_level
;
894 bool have_chan_pwr
= false;
897 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
900 triplet
= (void *)(country_ie
+ 3);
903 switch (channel
->band
) {
907 case IEEE80211_BAND_2GHZ
:
908 case IEEE80211_BAND_60GHZ
:
911 case IEEE80211_BAND_5GHZ
:
917 while (country_ie_len
>= 3) {
918 u8 first_channel
= triplet
->chans
.first_channel
;
920 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
923 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
924 if (first_channel
+ i
* chan_increment
== chan
) {
925 have_chan_pwr
= true;
926 chan_pwr
= triplet
->chans
.max_power
;
941 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
943 if (sdata
->ap_power_level
== new_ap_level
)
947 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
948 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
950 sdata
->ap_power_level
= new_ap_level
;
951 if (__ieee80211_recalc_txpower(sdata
))
952 return BSS_CHANGED_TXPOWER
;
957 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
958 struct ieee80211_sub_if_data
*sdata
)
960 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
963 * If we are scanning right now then the parameters will
964 * take effect when scan finishes.
969 if (conf
->dynamic_ps_timeout
> 0 &&
970 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
971 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
972 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
974 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
975 ieee80211_send_nullfunc(local
, sdata
, 1);
977 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
978 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
981 conf
->flags
|= IEEE80211_CONF_PS
;
982 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
986 static void ieee80211_change_ps(struct ieee80211_local
*local
)
988 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
990 if (local
->ps_sdata
) {
991 ieee80211_enable_ps(local
, local
->ps_sdata
);
992 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
993 conf
->flags
&= ~IEEE80211_CONF_PS
;
994 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
995 del_timer_sync(&local
->dynamic_ps_timer
);
996 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1000 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1002 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1003 struct sta_info
*sta
= NULL
;
1004 bool authorized
= false;
1006 if (!mgd
->powersave
)
1012 if (!mgd
->associated
)
1015 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1016 IEEE80211_STA_CONNECTION_POLL
))
1020 sta
= sta_info_get(sdata
, mgd
->bssid
);
1022 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1028 /* need to hold RTNL or interface lock */
1029 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1031 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1035 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1036 local
->ps_sdata
= NULL
;
1040 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1041 if (!ieee80211_sdata_running(sdata
))
1043 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1044 /* If an AP vif is found, then disable PS
1045 * by setting the count to zero thereby setting
1051 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1057 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1061 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1063 beaconint_us
= ieee80211_tu_to_usec(
1064 found
->vif
.bss_conf
.beacon_int
);
1066 timeout
= local
->dynamic_ps_forced_timeout
;
1069 * Go to full PSM if the user configures a very low
1070 * latency requirement.
1071 * The 2000 second value is there for compatibility
1072 * until the PM_QOS_NETWORK_LATENCY is configured
1075 if (latency
> (1900 * USEC_PER_MSEC
) &&
1076 latency
!= (2000 * USEC_PER_SEC
))
1081 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1083 if (beaconint_us
> latency
) {
1084 local
->ps_sdata
= NULL
;
1087 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1089 /* If the TIM IE is invalid, pretend the value is 1 */
1092 else if (dtimper
> 1)
1093 maxslp
= min_t(int, dtimper
,
1094 latency
/ beaconint_us
);
1096 local
->hw
.conf
.max_sleep_period
= maxslp
;
1097 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1098 local
->ps_sdata
= found
;
1101 local
->ps_sdata
= NULL
;
1104 ieee80211_change_ps(local
);
1107 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1109 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1111 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1112 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1113 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1117 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1119 struct ieee80211_local
*local
=
1120 container_of(work
, struct ieee80211_local
,
1121 dynamic_ps_disable_work
);
1123 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1124 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1125 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1128 ieee80211_wake_queues_by_reason(&local
->hw
,
1129 IEEE80211_QUEUE_STOP_REASON_PS
);
1132 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1134 struct ieee80211_local
*local
=
1135 container_of(work
, struct ieee80211_local
,
1136 dynamic_ps_enable_work
);
1137 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1138 struct ieee80211_if_managed
*ifmgd
;
1139 unsigned long flags
;
1142 /* can only happen when PS was just disabled anyway */
1146 ifmgd
= &sdata
->u
.mgd
;
1148 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1151 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1152 /* don't enter PS if TX frames are pending */
1153 if (drv_tx_frames_pending(local
)) {
1154 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1156 local
->hw
.conf
.dynamic_ps_timeout
));
1161 * transmission can be stopped by others which leads to
1162 * dynamic_ps_timer expiry. Postpone the ps timer if it
1163 * is not the actual idle state.
1165 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1166 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1167 if (local
->queue_stop_reasons
[q
]) {
1168 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1170 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1172 local
->hw
.conf
.dynamic_ps_timeout
));
1176 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1179 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1180 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1181 netif_tx_stop_all_queues(sdata
->dev
);
1183 if (drv_tx_frames_pending(local
))
1184 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1186 local
->hw
.conf
.dynamic_ps_timeout
));
1188 ieee80211_send_nullfunc(local
, sdata
, 1);
1189 /* Flush to get the tx status of nullfunc frame */
1190 drv_flush(local
, false);
1194 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1195 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1196 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1197 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1198 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1199 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1202 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1203 netif_tx_wake_all_queues(sdata
->dev
);
1206 void ieee80211_dynamic_ps_timer(unsigned long data
)
1208 struct ieee80211_local
*local
= (void *) data
;
1210 if (local
->quiescing
|| local
->suspended
)
1213 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1216 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1218 struct delayed_work
*delayed_work
=
1219 container_of(work
, struct delayed_work
, work
);
1220 struct ieee80211_sub_if_data
*sdata
=
1221 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1222 dfs_cac_timer_work
);
1224 ieee80211_vif_release_channel(sdata
);
1226 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1230 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1231 struct ieee80211_sub_if_data
*sdata
,
1232 u8
*wmm_param
, size_t wmm_param_len
)
1234 struct ieee80211_tx_queue_params params
;
1235 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1238 u8
*pos
, uapsd_queues
= 0;
1240 if (!local
->ops
->conf_tx
)
1243 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1249 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1252 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1253 uapsd_queues
= ifmgd
->uapsd_queues
;
1255 count
= wmm_param
[6] & 0x0f;
1256 if (count
== ifmgd
->wmm_last_param_set
)
1258 ifmgd
->wmm_last_param_set
= count
;
1260 pos
= wmm_param
+ 8;
1261 left
= wmm_param_len
- 8;
1263 memset(¶ms
, 0, sizeof(params
));
1266 for (; left
>= 4; left
-= 4, pos
+= 4) {
1267 int aci
= (pos
[0] >> 5) & 0x03;
1268 int acm
= (pos
[0] >> 4) & 0x01;
1276 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1277 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1283 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1284 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1290 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1291 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1298 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1299 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1304 params
.aifs
= pos
[0] & 0x0f;
1305 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1306 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1307 params
.txop
= get_unaligned_le16(pos
+ 2);
1308 params
.uapsd
= uapsd
;
1311 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1313 params
.aifs
, params
.cw_min
, params
.cw_max
,
1314 params
.txop
, params
.uapsd
);
1315 sdata
->tx_conf
[queue
] = params
;
1316 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1318 "failed to set TX queue parameters for queue %d\n",
1322 /* enable WMM or activate new settings */
1323 sdata
->vif
.bss_conf
.qos
= true;
1327 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1329 lockdep_assert_held(&sdata
->local
->mtx
);
1331 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1332 IEEE80211_STA_BEACON_POLL
);
1333 ieee80211_run_deferred_scan(sdata
->local
);
1336 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1338 mutex_lock(&sdata
->local
->mtx
);
1339 __ieee80211_stop_poll(sdata
);
1340 mutex_unlock(&sdata
->local
->mtx
);
1343 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1344 u16 capab
, bool erp_valid
, u8 erp
)
1346 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1348 bool use_protection
;
1349 bool use_short_preamble
;
1350 bool use_short_slot
;
1353 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1354 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1356 use_protection
= false;
1357 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1360 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1361 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1362 use_short_slot
= true;
1364 if (use_protection
!= bss_conf
->use_cts_prot
) {
1365 bss_conf
->use_cts_prot
= use_protection
;
1366 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1369 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1370 bss_conf
->use_short_preamble
= use_short_preamble
;
1371 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1374 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1375 bss_conf
->use_short_slot
= use_short_slot
;
1376 changed
|= BSS_CHANGED_ERP_SLOT
;
1382 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1383 struct cfg80211_bss
*cbss
,
1384 u32 bss_info_changed
)
1386 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1387 struct ieee80211_local
*local
= sdata
->local
;
1388 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1390 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1391 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1392 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1394 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1395 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1397 sdata
->u
.mgd
.associated
= cbss
;
1398 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1400 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1402 if (sdata
->vif
.p2p
) {
1403 const struct cfg80211_bss_ies
*ies
;
1406 ies
= rcu_dereference(cbss
->ies
);
1411 ret
= cfg80211_get_p2p_attr(
1412 ies
->data
, ies
->len
,
1413 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1416 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
1417 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
1418 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1419 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
1425 /* just to be sure */
1426 ieee80211_stop_poll(sdata
);
1428 ieee80211_led_assoc(local
, 1);
1430 if (sdata
->u
.mgd
.assoc_data
->have_beacon
) {
1432 * If the AP is buggy we may get here with no DTIM period
1433 * known, so assume it's 1 which is the only safe assumption
1434 * in that case, although if the TIM IE is broken powersave
1435 * probably just won't work at all.
1437 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1438 bss_info_changed
|= BSS_CHANGED_DTIM_PERIOD
;
1440 bss_conf
->dtim_period
= 0;
1443 bss_conf
->assoc
= 1;
1445 /* Tell the driver to monitor connection quality (if supported) */
1446 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1447 bss_conf
->cqm_rssi_thold
)
1448 bss_info_changed
|= BSS_CHANGED_CQM
;
1450 /* Enable ARP filtering */
1451 if (bss_conf
->arp_addr_cnt
)
1452 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1454 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1456 mutex_lock(&local
->iflist_mtx
);
1457 ieee80211_recalc_ps(local
, -1);
1458 mutex_unlock(&local
->iflist_mtx
);
1460 ieee80211_recalc_smps(sdata
);
1461 ieee80211_recalc_ps_vif(sdata
);
1463 netif_tx_start_all_queues(sdata
->dev
);
1464 netif_carrier_on(sdata
->dev
);
1467 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1468 u16 stype
, u16 reason
, bool tx
,
1471 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1472 struct ieee80211_local
*local
= sdata
->local
;
1475 ASSERT_MGD_MTX(ifmgd
);
1477 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1480 if (WARN_ON(!ifmgd
->associated
))
1483 ieee80211_stop_poll(sdata
);
1485 ifmgd
->associated
= NULL
;
1488 * we need to commit the associated = NULL change because the
1489 * scan code uses that to determine whether this iface should
1490 * go to/wake up from powersave or not -- and could otherwise
1491 * wake the queues erroneously.
1496 * Thus, we can only afterwards stop the queues -- to account
1497 * for the case where another CPU is finishing a scan at this
1498 * time -- we don't want the scan code to enable queues.
1501 netif_tx_stop_all_queues(sdata
->dev
);
1502 netif_carrier_off(sdata
->dev
);
1505 * if we want to get out of ps before disassoc (why?) we have
1506 * to do it before sending disassoc, as otherwise the null-packet
1509 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1510 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1511 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1513 local
->ps_sdata
= NULL
;
1515 /* disable per-vif ps */
1516 ieee80211_recalc_ps_vif(sdata
);
1518 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1520 drv_flush(local
, false);
1522 /* deauthenticate/disassociate now */
1523 if (tx
|| frame_buf
)
1524 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1525 reason
, tx
, frame_buf
);
1527 /* flush out frame */
1529 drv_flush(local
, false);
1531 /* clear bssid only after building the needed mgmt frames */
1532 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1534 /* remove AP and TDLS peers */
1535 sta_info_flush_defer(sdata
);
1537 /* finally reset all BSS / config parameters */
1538 changed
|= ieee80211_reset_erp_info(sdata
);
1540 ieee80211_led_assoc(local
, 0);
1541 changed
|= BSS_CHANGED_ASSOC
;
1542 sdata
->vif
.bss_conf
.assoc
= false;
1544 sdata
->vif
.bss_conf
.p2p_ctwindow
= 0;
1545 sdata
->vif
.bss_conf
.p2p_oppps
= false;
1547 /* on the next assoc, re-program HT parameters */
1548 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1549 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1551 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1553 del_timer_sync(&local
->dynamic_ps_timer
);
1554 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1556 /* Disable ARP filtering */
1557 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1558 changed
|= BSS_CHANGED_ARP_FILTER
;
1560 sdata
->vif
.bss_conf
.qos
= false;
1561 changed
|= BSS_CHANGED_QOS
;
1563 /* The BSSID (not really interesting) and HT changed */
1564 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1565 ieee80211_bss_info_change_notify(sdata
, changed
);
1567 /* disassociated - set to defaults now */
1568 ieee80211_set_wmm_default(sdata
, false);
1570 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1571 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1572 del_timer_sync(&sdata
->u
.mgd
.timer
);
1573 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1575 sdata
->u
.mgd
.timers_running
= 0;
1577 sdata
->vif
.bss_conf
.dtim_period
= 0;
1580 ieee80211_vif_release_channel(sdata
);
1583 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1584 struct ieee80211_hdr
*hdr
)
1587 * We can postpone the mgd.timer whenever receiving unicast frames
1588 * from AP because we know that the connection is working both ways
1589 * at that time. But multicast frames (and hence also beacons) must
1590 * be ignored here, because we need to trigger the timer during
1591 * data idle periods for sending the periodic probe request to the
1592 * AP we're connected to.
1594 if (is_multicast_ether_addr(hdr
->addr1
))
1597 ieee80211_sta_reset_conn_monitor(sdata
);
1600 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1602 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1603 struct ieee80211_local
*local
= sdata
->local
;
1605 mutex_lock(&local
->mtx
);
1606 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1607 IEEE80211_STA_CONNECTION_POLL
))) {
1608 mutex_unlock(&local
->mtx
);
1612 __ieee80211_stop_poll(sdata
);
1614 mutex_lock(&local
->iflist_mtx
);
1615 ieee80211_recalc_ps(local
, -1);
1616 mutex_unlock(&local
->iflist_mtx
);
1618 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1622 * We've received a probe response, but are not sure whether
1623 * we have or will be receiving any beacons or data, so let's
1624 * schedule the timers again, just in case.
1626 ieee80211_sta_reset_beacon_monitor(sdata
);
1628 mod_timer(&ifmgd
->conn_mon_timer
,
1629 round_jiffies_up(jiffies
+
1630 IEEE80211_CONNECTION_IDLE_TIME
));
1632 mutex_unlock(&local
->mtx
);
1635 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1636 struct ieee80211_hdr
*hdr
, bool ack
)
1638 if (!ieee80211_is_data(hdr
->frame_control
))
1641 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1642 sdata
->u
.mgd
.probe_send_count
> 0) {
1644 ieee80211_sta_reset_conn_monitor(sdata
);
1646 sdata
->u
.mgd
.nullfunc_failed
= true;
1647 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1652 ieee80211_sta_reset_conn_monitor(sdata
);
1655 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1657 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1659 u8
*dst
= ifmgd
->associated
->bssid
;
1660 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1663 * Try sending broadcast probe requests for the last three
1664 * probe requests after the first ones failed since some
1665 * buggy APs only support broadcast probe requests.
1667 if (ifmgd
->probe_send_count
>= unicast_limit
)
1671 * When the hardware reports an accurate Tx ACK status, it's
1672 * better to send a nullfunc frame instead of a probe request,
1673 * as it will kick us off the AP quickly if we aren't associated
1674 * anymore. The timeout will be reset if the frame is ACKed by
1677 ifmgd
->probe_send_count
++;
1679 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1680 ifmgd
->nullfunc_failed
= false;
1681 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1686 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1687 if (WARN_ON_ONCE(ssid
== NULL
))
1692 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1693 0, (u32
) -1, true, 0,
1694 ifmgd
->associated
->channel
, false);
1698 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1699 run_again(ifmgd
, ifmgd
->probe_timeout
);
1700 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1701 drv_flush(sdata
->local
, false);
1704 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1707 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1708 bool already
= false;
1710 if (!ieee80211_sdata_running(sdata
))
1713 mutex_lock(&ifmgd
->mtx
);
1715 if (!ifmgd
->associated
)
1718 mutex_lock(&sdata
->local
->mtx
);
1720 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1721 mutex_unlock(&sdata
->local
->mtx
);
1726 mlme_dbg_ratelimited(sdata
,
1727 "detected beacon loss from AP - probing\n");
1729 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1730 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1733 * The driver/our work has already reported this event or the
1734 * connection monitoring has kicked in and we have already sent
1735 * a probe request. Or maybe the AP died and the driver keeps
1736 * reporting until we disassociate...
1738 * In either case we have to ignore the current call to this
1739 * function (except for setting the correct probe reason bit)
1740 * because otherwise we would reset the timer every time and
1741 * never check whether we received a probe response!
1743 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1744 IEEE80211_STA_CONNECTION_POLL
))
1748 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1750 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1752 mutex_unlock(&sdata
->local
->mtx
);
1757 mutex_lock(&sdata
->local
->iflist_mtx
);
1758 ieee80211_recalc_ps(sdata
->local
, -1);
1759 mutex_unlock(&sdata
->local
->iflist_mtx
);
1761 ifmgd
->probe_send_count
= 0;
1762 ieee80211_mgd_probe_ap_send(sdata
);
1764 mutex_unlock(&ifmgd
->mtx
);
1767 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1768 struct ieee80211_vif
*vif
)
1770 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1771 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1772 struct cfg80211_bss
*cbss
;
1773 struct sk_buff
*skb
;
1777 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1780 ASSERT_MGD_MTX(ifmgd
);
1782 if (ifmgd
->associated
)
1783 cbss
= ifmgd
->associated
;
1784 else if (ifmgd
->auth_data
)
1785 cbss
= ifmgd
->auth_data
->bss
;
1786 else if (ifmgd
->assoc_data
)
1787 cbss
= ifmgd
->assoc_data
->bss
;
1792 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1793 if (WARN_ON_ONCE(ssid
== NULL
))
1798 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1799 (u32
) -1, cbss
->channel
,
1806 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1808 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
1810 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1811 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1813 mutex_lock(&ifmgd
->mtx
);
1814 if (!ifmgd
->associated
) {
1815 mutex_unlock(&ifmgd
->mtx
);
1819 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1822 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1823 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1824 IEEE80211_QUEUE_STOP_REASON_CSA
);
1825 mutex_unlock(&ifmgd
->mtx
);
1828 * must be outside lock due to cfg80211,
1829 * but that's not a problem.
1831 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1834 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1836 struct ieee80211_sub_if_data
*sdata
=
1837 container_of(work
, struct ieee80211_sub_if_data
,
1838 u
.mgd
.beacon_connection_loss_work
);
1839 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1840 struct sta_info
*sta
;
1842 if (ifmgd
->associated
) {
1844 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1846 sta
->beacon_loss_count
++;
1850 if (ifmgd
->connection_loss
) {
1851 sdata_info(sdata
, "Connection to AP %pM lost\n",
1853 __ieee80211_disconnect(sdata
);
1855 ieee80211_mgd_probe_ap(sdata
, true);
1859 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1861 struct ieee80211_sub_if_data
*sdata
=
1862 container_of(work
, struct ieee80211_sub_if_data
,
1863 u
.mgd
.csa_connection_drop_work
);
1865 __ieee80211_disconnect(sdata
);
1868 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1870 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1871 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1873 trace_api_beacon_loss(sdata
);
1875 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1876 sdata
->u
.mgd
.connection_loss
= false;
1877 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1879 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1881 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1883 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1884 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1886 trace_api_connection_loss(sdata
);
1888 sdata
->u
.mgd
.connection_loss
= true;
1889 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1891 EXPORT_SYMBOL(ieee80211_connection_loss
);
1894 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1897 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1899 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1902 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1904 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1905 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1906 sdata
->u
.mgd
.flags
= 0;
1907 ieee80211_vif_release_channel(sdata
);
1910 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
1912 sdata
->u
.mgd
.auth_data
= NULL
;
1915 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1916 struct ieee80211_mgmt
*mgmt
, size_t len
)
1918 struct ieee80211_local
*local
= sdata
->local
;
1919 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1921 struct ieee802_11_elems elems
;
1924 pos
= mgmt
->u
.auth
.variable
;
1925 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1926 if (!elems
.challenge
)
1928 auth_data
->expected_transaction
= 4;
1929 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1930 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1931 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1932 IEEE80211_TX_INTFL_MLME_CONN_TX
;
1933 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
1934 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1935 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1936 auth_data
->key
, auth_data
->key_len
,
1937 auth_data
->key_idx
, tx_flags
);
1940 static enum rx_mgmt_action __must_check
1941 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1942 struct ieee80211_mgmt
*mgmt
, size_t len
)
1944 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1946 u16 auth_alg
, auth_transaction
, status_code
;
1947 struct sta_info
*sta
;
1949 lockdep_assert_held(&ifmgd
->mtx
);
1952 return RX_MGMT_NONE
;
1954 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1955 return RX_MGMT_NONE
;
1957 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1959 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1960 return RX_MGMT_NONE
;
1962 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1963 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1964 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1966 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1967 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
1968 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1969 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
1971 ifmgd
->auth_data
->expected_transaction
);
1972 return RX_MGMT_NONE
;
1975 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1976 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1977 mgmt
->sa
, status_code
);
1978 ieee80211_destroy_auth_data(sdata
, false);
1979 return RX_MGMT_CFG80211_RX_AUTH
;
1982 switch (ifmgd
->auth_data
->algorithm
) {
1983 case WLAN_AUTH_OPEN
:
1984 case WLAN_AUTH_LEAP
:
1988 case WLAN_AUTH_SHARED_KEY
:
1989 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1990 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1991 /* need another frame */
1992 return RX_MGMT_NONE
;
1996 WARN_ONCE(1, "invalid auth alg %d",
1997 ifmgd
->auth_data
->algorithm
);
1998 return RX_MGMT_NONE
;
2001 sdata_info(sdata
, "authenticated\n");
2002 ifmgd
->auth_data
->done
= true;
2003 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2004 ifmgd
->auth_data
->timeout_started
= true;
2005 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2007 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2008 ifmgd
->auth_data
->expected_transaction
!= 2) {
2010 * Report auth frame to user space for processing since another
2011 * round of Authentication frames is still needed.
2013 return RX_MGMT_CFG80211_RX_AUTH
;
2016 /* move station state to auth */
2017 mutex_lock(&sdata
->local
->sta_mtx
);
2018 sta
= sta_info_get(sdata
, bssid
);
2020 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2023 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2024 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2027 mutex_unlock(&sdata
->local
->sta_mtx
);
2029 return RX_MGMT_CFG80211_RX_AUTH
;
2031 mutex_unlock(&sdata
->local
->sta_mtx
);
2032 /* ignore frame -- wait for timeout */
2033 return RX_MGMT_NONE
;
2037 static enum rx_mgmt_action __must_check
2038 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2039 struct ieee80211_mgmt
*mgmt
, size_t len
)
2041 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2042 const u8
*bssid
= NULL
;
2045 lockdep_assert_held(&ifmgd
->mtx
);
2048 return RX_MGMT_NONE
;
2050 if (!ifmgd
->associated
||
2051 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2052 return RX_MGMT_NONE
;
2054 bssid
= ifmgd
->associated
->bssid
;
2056 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2058 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2059 bssid
, reason_code
);
2061 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2063 return RX_MGMT_CFG80211_DEAUTH
;
2067 static enum rx_mgmt_action __must_check
2068 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2069 struct ieee80211_mgmt
*mgmt
, size_t len
)
2071 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2074 lockdep_assert_held(&ifmgd
->mtx
);
2077 return RX_MGMT_NONE
;
2079 if (!ifmgd
->associated
||
2080 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2081 return RX_MGMT_NONE
;
2083 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2085 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2086 mgmt
->sa
, reason_code
);
2088 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2090 return RX_MGMT_CFG80211_DISASSOC
;
2093 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2094 u8
*supp_rates
, unsigned int supp_rates_len
,
2095 u32
*rates
, u32
*basic_rates
,
2096 bool *have_higher_than_11mbit
,
2097 int *min_rate
, int *min_rate_index
)
2101 for (i
= 0; i
< supp_rates_len
; i
++) {
2102 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2103 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2106 *have_higher_than_11mbit
= true;
2109 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2110 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2112 * Note: Even through the membership selector and the basic
2113 * rate flag share the same bit, they are not exactly
2116 if (!!(supp_rates
[i
] & 0x80) &&
2117 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2120 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2121 if (sband
->bitrates
[j
].bitrate
== rate
) {
2124 *basic_rates
|= BIT(j
);
2125 if (rate
< *min_rate
) {
2127 *min_rate_index
= j
;
2135 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2138 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2140 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2143 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2145 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2146 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2147 sdata
->u
.mgd
.flags
= 0;
2148 ieee80211_vif_release_channel(sdata
);
2152 sdata
->u
.mgd
.assoc_data
= NULL
;
2155 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2156 struct cfg80211_bss
*cbss
,
2157 struct ieee80211_mgmt
*mgmt
, size_t len
)
2159 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2160 struct ieee80211_local
*local
= sdata
->local
;
2161 struct ieee80211_supported_band
*sband
;
2162 struct sta_info
*sta
;
2164 u16 capab_info
, aid
;
2165 struct ieee802_11_elems elems
;
2166 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2170 /* AssocResp and ReassocResp have identical structure */
2172 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2173 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2175 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2176 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2178 aid
&= ~(BIT(15) | BIT(14));
2180 ifmgd
->broken_ap
= false;
2182 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2183 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2186 ifmgd
->broken_ap
= true;
2189 pos
= mgmt
->u
.assoc_resp
.variable
;
2190 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2192 if (!elems
.supp_rates
) {
2193 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2199 mutex_lock(&sdata
->local
->sta_mtx
);
2201 * station info was already allocated and inserted before
2202 * the association and should be available to us
2204 sta
= sta_info_get(sdata
, cbss
->bssid
);
2205 if (WARN_ON(!sta
)) {
2206 mutex_unlock(&sdata
->local
->sta_mtx
);
2210 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2212 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2213 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2214 elems
.ht_cap_elem
, sta
);
2216 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2217 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2218 elems
.vht_cap_elem
, sta
);
2220 rate_control_rate_init(sta
);
2222 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2223 set_sta_flag(sta
, WLAN_STA_MFP
);
2225 if (elems
.wmm_param
)
2226 set_sta_flag(sta
, WLAN_STA_WME
);
2228 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2229 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2230 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2233 "failed to move station %pM to desired state\n",
2235 WARN_ON(__sta_info_destroy(sta
));
2236 mutex_unlock(&sdata
->local
->sta_mtx
);
2240 mutex_unlock(&sdata
->local
->sta_mtx
);
2243 * Always handle WMM once after association regardless
2244 * of the first value the AP uses. Setting -1 here has
2245 * that effect because the AP values is an unsigned
2248 ifmgd
->wmm_last_param_set
= -1;
2250 if (elems
.wmm_param
)
2251 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2252 elems
.wmm_param_len
);
2254 ieee80211_set_wmm_default(sdata
, false);
2255 changed
|= BSS_CHANGED_QOS
;
2257 if (elems
.ht_operation
&& elems
.wmm_param
&&
2258 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2259 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2260 cbss
->bssid
, false);
2262 /* set AID and assoc capability,
2263 * ieee80211_set_associated() will tell the driver */
2264 bss_conf
->aid
= aid
;
2265 bss_conf
->assoc_capability
= capab_info
;
2266 ieee80211_set_associated(sdata
, cbss
, changed
);
2269 * If we're using 4-addr mode, let the AP know that we're
2270 * doing so, so that it can create the STA VLAN on its side
2272 if (ifmgd
->use_4addr
)
2273 ieee80211_send_4addr_nullfunc(local
, sdata
);
2276 * Start timer to probe the connection to the AP now.
2277 * Also start the timer that will detect beacon loss.
2279 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2280 ieee80211_sta_reset_beacon_monitor(sdata
);
2285 static enum rx_mgmt_action __must_check
2286 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2287 struct ieee80211_mgmt
*mgmt
, size_t len
,
2288 struct cfg80211_bss
**bss
)
2290 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2291 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2292 u16 capab_info
, status_code
, aid
;
2293 struct ieee802_11_elems elems
;
2297 lockdep_assert_held(&ifmgd
->mtx
);
2300 return RX_MGMT_NONE
;
2301 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2302 return RX_MGMT_NONE
;
2305 * AssocResp and ReassocResp have identical structure, so process both
2306 * of them in this function.
2310 return RX_MGMT_NONE
;
2312 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2313 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2314 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2315 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2318 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2319 reassoc
? "Rea" : "A", mgmt
->sa
,
2320 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2322 pos
= mgmt
->u
.assoc_resp
.variable
;
2323 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2325 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2326 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2327 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2329 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2330 ms
= tu
* 1024 / 1000;
2332 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2334 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2335 assoc_data
->timeout_started
= true;
2336 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2337 run_again(ifmgd
, assoc_data
->timeout
);
2338 return RX_MGMT_NONE
;
2341 *bss
= assoc_data
->bss
;
2343 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2344 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2345 mgmt
->sa
, status_code
);
2346 ieee80211_destroy_assoc_data(sdata
, false);
2348 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2349 /* oops -- internal error -- send timeout for now */
2350 ieee80211_destroy_assoc_data(sdata
, false);
2351 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, *bss
);
2352 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2354 sdata_info(sdata
, "associated\n");
2357 * destroy assoc_data afterwards, as otherwise an idle
2358 * recalc after assoc_data is NULL but before associated
2359 * is set can cause the interface to go idle
2361 ieee80211_destroy_assoc_data(sdata
, true);
2364 return RX_MGMT_CFG80211_RX_ASSOC
;
2367 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2368 struct ieee80211_mgmt
*mgmt
, size_t len
,
2369 struct ieee80211_rx_status
*rx_status
,
2370 struct ieee802_11_elems
*elems
)
2372 struct ieee80211_local
*local
= sdata
->local
;
2374 struct ieee80211_bss
*bss
;
2375 struct ieee80211_channel
*channel
;
2376 bool need_ps
= false;
2378 if ((sdata
->u
.mgd
.associated
&&
2379 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2380 (sdata
->u
.mgd
.assoc_data
&&
2381 ether_addr_equal(mgmt
->bssid
,
2382 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2383 /* not previously set so we may need to recalc */
2384 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2386 if (elems
->tim
&& !elems
->parse_error
) {
2387 struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2388 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2392 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2393 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2396 freq
= rx_status
->freq
;
2398 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2400 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2403 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2406 ieee80211_rx_bss_put(local
, bss
);
2408 if (!sdata
->u
.mgd
.associated
)
2412 mutex_lock(&local
->iflist_mtx
);
2413 ieee80211_recalc_ps(local
, -1);
2414 mutex_unlock(&local
->iflist_mtx
);
2417 if (elems
->ch_switch_ie
&&
2418 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2419 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2420 bss
, rx_status
->mactime
);
2424 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2425 struct sk_buff
*skb
)
2427 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2428 struct ieee80211_if_managed
*ifmgd
;
2429 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2430 size_t baselen
, len
= skb
->len
;
2431 struct ieee802_11_elems elems
;
2433 ifmgd
= &sdata
->u
.mgd
;
2435 ASSERT_MGD_MTX(ifmgd
);
2437 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2438 return; /* ignore ProbeResp to foreign address */
2440 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2444 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2447 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2449 if (ifmgd
->associated
&&
2450 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2451 ieee80211_reset_ap_probe(sdata
);
2453 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2454 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2455 /* got probe response, continue with auth */
2456 sdata_info(sdata
, "direct probe responded\n");
2457 ifmgd
->auth_data
->tries
= 0;
2458 ifmgd
->auth_data
->timeout
= jiffies
;
2459 ifmgd
->auth_data
->timeout_started
= true;
2460 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2465 * This is the canonical list of information elements we care about,
2466 * the filter code also gives us all changes to the Microsoft OUI
2467 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2469 * We implement beacon filtering in software since that means we can
2470 * avoid processing the frame here and in cfg80211, and userspace
2471 * will not be able to tell whether the hardware supports it or not.
2473 * XXX: This list needs to be dynamic -- userspace needs to be able to
2474 * add items it requires. It also needs to be able to tell us to
2475 * look out for other vendor IEs.
2477 static const u64 care_about_ies
=
2478 (1ULL << WLAN_EID_COUNTRY
) |
2479 (1ULL << WLAN_EID_ERP_INFO
) |
2480 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2481 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2482 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2483 (1ULL << WLAN_EID_HT_OPERATION
);
2485 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2486 struct ieee80211_mgmt
*mgmt
,
2488 struct ieee80211_rx_status
*rx_status
)
2490 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2491 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2493 struct ieee802_11_elems elems
;
2494 struct ieee80211_local
*local
= sdata
->local
;
2495 struct ieee80211_chanctx_conf
*chanctx_conf
;
2496 struct ieee80211_channel
*chan
;
2503 lockdep_assert_held(&ifmgd
->mtx
);
2505 /* Process beacon from the current BSS */
2506 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2511 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2512 if (!chanctx_conf
) {
2517 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2521 chan
= chanctx_conf
->def
.chan
;
2524 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2525 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2526 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2527 len
- baselen
, &elems
);
2529 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2530 ifmgd
->assoc_data
->have_beacon
= true;
2531 ifmgd
->assoc_data
->need_beacon
= false;
2532 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2533 sdata
->vif
.bss_conf
.sync_tsf
=
2534 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2535 sdata
->vif
.bss_conf
.sync_device_ts
=
2536 rx_status
->device_timestamp
;
2538 sdata
->vif
.bss_conf
.sync_dtim_count
=
2539 elems
.tim
->dtim_count
;
2541 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2543 /* continue assoc process */
2544 ifmgd
->assoc_data
->timeout
= jiffies
;
2545 ifmgd
->assoc_data
->timeout_started
= true;
2546 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2550 if (!ifmgd
->associated
||
2551 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2553 bssid
= ifmgd
->associated
->bssid
;
2555 /* Track average RSSI from the Beacon frames of the current AP */
2556 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2557 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2558 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2559 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2560 ifmgd
->last_cqm_event_signal
= 0;
2561 ifmgd
->count_beacon_signal
= 1;
2562 ifmgd
->last_ave_beacon_signal
= 0;
2564 ifmgd
->ave_beacon_signal
=
2565 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2566 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2567 ifmgd
->ave_beacon_signal
) / 16;
2568 ifmgd
->count_beacon_signal
++;
2571 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2572 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2573 int sig
= ifmgd
->ave_beacon_signal
;
2574 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2577 * if signal crosses either of the boundaries, invoke callback
2578 * with appropriate parameters
2580 if (sig
> ifmgd
->rssi_max_thold
&&
2581 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2582 ifmgd
->last_ave_beacon_signal
= sig
;
2583 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2584 } else if (sig
< ifmgd
->rssi_min_thold
&&
2585 (last_sig
>= ifmgd
->rssi_max_thold
||
2587 ifmgd
->last_ave_beacon_signal
= sig
;
2588 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2592 if (bss_conf
->cqm_rssi_thold
&&
2593 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2594 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2595 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2596 int last_event
= ifmgd
->last_cqm_event_signal
;
2597 int thold
= bss_conf
->cqm_rssi_thold
;
2598 int hyst
= bss_conf
->cqm_rssi_hyst
;
2600 (last_event
== 0 || sig
< last_event
- hyst
)) {
2601 ifmgd
->last_cqm_event_signal
= sig
;
2602 ieee80211_cqm_rssi_notify(
2604 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2606 } else if (sig
> thold
&&
2607 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2608 ifmgd
->last_cqm_event_signal
= sig
;
2609 ieee80211_cqm_rssi_notify(
2611 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2616 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2617 mlme_dbg_ratelimited(sdata
,
2618 "cancelling AP probe due to a received beacon\n");
2619 mutex_lock(&local
->mtx
);
2620 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2621 ieee80211_run_deferred_scan(local
);
2622 mutex_unlock(&local
->mtx
);
2624 mutex_lock(&local
->iflist_mtx
);
2625 ieee80211_recalc_ps(local
, -1);
2626 mutex_unlock(&local
->iflist_mtx
);
2630 * Push the beacon loss detection into the future since
2631 * we are processing a beacon from the AP just now.
2633 ieee80211_sta_reset_beacon_monitor(sdata
);
2635 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2636 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2637 len
- baselen
, &elems
,
2638 care_about_ies
, ncrc
);
2640 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2641 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2645 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2646 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2647 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2648 ieee80211_hw_config(local
,
2649 IEEE80211_CONF_CHANGE_PS
);
2651 ieee80211_send_nullfunc(local
, sdata
, 0);
2652 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2653 local
->pspolling
= true;
2656 * Here is assumed that the driver will be
2657 * able to send ps-poll frame and receive a
2658 * response even though power save mode is
2659 * enabled, but some drivers might require
2660 * to disable power save here. This needs
2661 * to be investigated.
2663 ieee80211_send_pspoll(local
, sdata
);
2668 if (sdata
->vif
.p2p
) {
2672 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2674 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2676 if (ret
>= 2 && sdata
->u
.mgd
.p2p_noa_index
!= noa
[0]) {
2677 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
2678 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
2679 changed
|= BSS_CHANGED_P2P_PS
;
2680 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
2682 * make sure we update all information, the CRC
2683 * mechanism doesn't look at P2P attributes.
2685 ifmgd
->beacon_crc_valid
= false;
2689 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2691 ifmgd
->beacon_crc
= ncrc
;
2692 ifmgd
->beacon_crc_valid
= true;
2694 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2696 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2697 elems
.wmm_param_len
))
2698 changed
|= BSS_CHANGED_QOS
;
2701 * If we haven't had a beacon before, tell the driver about the
2702 * DTIM period (and beacon timing if desired) now.
2704 if (!bss_conf
->dtim_period
) {
2705 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2707 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
2709 bss_conf
->dtim_period
= 1;
2711 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2712 sdata
->vif
.bss_conf
.sync_tsf
=
2713 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2714 sdata
->vif
.bss_conf
.sync_device_ts
=
2715 rx_status
->device_timestamp
;
2717 sdata
->vif
.bss_conf
.sync_dtim_count
=
2718 elems
.tim
->dtim_count
;
2720 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2723 changed
|= BSS_CHANGED_DTIM_PERIOD
;
2726 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2728 erp_value
= elems
.erp_info
[0];
2732 changed
|= ieee80211_handle_bss_capability(sdata
,
2733 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2734 erp_valid
, erp_value
);
2737 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2738 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2739 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2742 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2743 mgmt
->u
.probe_resp
.capab_info
&
2744 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2745 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
2747 elems
.country_elem_len
,
2748 elems
.pwr_constr_elem
);
2750 ieee80211_bss_info_change_notify(sdata
, changed
);
2753 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2754 struct sk_buff
*skb
)
2756 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2757 struct ieee80211_rx_status
*rx_status
;
2758 struct ieee80211_mgmt
*mgmt
;
2759 struct cfg80211_bss
*bss
= NULL
;
2760 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2763 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2764 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2765 fc
= le16_to_cpu(mgmt
->frame_control
);
2767 mutex_lock(&ifmgd
->mtx
);
2769 switch (fc
& IEEE80211_FCTL_STYPE
) {
2770 case IEEE80211_STYPE_BEACON
:
2771 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2773 case IEEE80211_STYPE_PROBE_RESP
:
2774 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2776 case IEEE80211_STYPE_AUTH
:
2777 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2779 case IEEE80211_STYPE_DEAUTH
:
2780 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2782 case IEEE80211_STYPE_DISASSOC
:
2783 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2785 case IEEE80211_STYPE_ASSOC_RESP
:
2786 case IEEE80211_STYPE_REASSOC_RESP
:
2787 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2789 case IEEE80211_STYPE_ACTION
:
2790 switch (mgmt
->u
.action
.category
) {
2791 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2792 ieee80211_sta_process_chanswitch(sdata
,
2793 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2794 (void *)ifmgd
->associated
->priv
,
2795 rx_status
->mactime
);
2799 mutex_unlock(&ifmgd
->mtx
);
2805 case RX_MGMT_CFG80211_DEAUTH
:
2806 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2808 case RX_MGMT_CFG80211_DISASSOC
:
2809 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2811 case RX_MGMT_CFG80211_RX_AUTH
:
2812 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2814 case RX_MGMT_CFG80211_RX_ASSOC
:
2815 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2817 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2818 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2821 WARN(1, "unexpected: %d", rma
);
2825 static void ieee80211_sta_timer(unsigned long data
)
2827 struct ieee80211_sub_if_data
*sdata
=
2828 (struct ieee80211_sub_if_data
*) data
;
2829 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2830 struct ieee80211_local
*local
= sdata
->local
;
2832 if (local
->quiescing
) {
2833 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2837 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2840 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2841 u8
*bssid
, u8 reason
, bool tx
)
2843 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2844 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2846 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2848 mutex_unlock(&ifmgd
->mtx
);
2851 * must be outside lock due to cfg80211,
2852 * but that's not a problem.
2854 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2856 mutex_lock(&ifmgd
->mtx
);
2859 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2861 struct ieee80211_local
*local
= sdata
->local
;
2862 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2863 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2866 lockdep_assert_held(&ifmgd
->mtx
);
2868 if (WARN_ON_ONCE(!auth_data
))
2871 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2872 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2873 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2877 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2878 sdata_info(sdata
, "authentication with %pM timed out\n",
2879 auth_data
->bss
->bssid
);
2882 * Most likely AP is not in the range so remove the
2883 * bss struct for that AP.
2885 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2890 drv_mgd_prepare_tx(local
, sdata
);
2892 if (auth_data
->bss
->proberesp_ies
) {
2896 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2897 auth_data
->bss
->bssid
, auth_data
->tries
,
2898 IEEE80211_AUTH_MAX_TRIES
);
2900 auth_data
->expected_transaction
= 2;
2902 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
2903 trans
= auth_data
->sae_trans
;
2904 status
= auth_data
->sae_status
;
2905 auth_data
->expected_transaction
= trans
;
2908 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
2909 auth_data
->data
, auth_data
->data_len
,
2910 auth_data
->bss
->bssid
,
2911 auth_data
->bss
->bssid
, NULL
, 0, 0,
2916 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2917 auth_data
->bss
->bssid
, auth_data
->tries
,
2918 IEEE80211_AUTH_MAX_TRIES
);
2921 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2927 * Direct probe is sent to broadcast address as some APs
2928 * will not answer to direct packet in unassociated state.
2930 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2931 NULL
, 0, (u32
) -1, true, tx_flags
,
2932 auth_data
->bss
->channel
, false);
2936 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
2937 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2938 ifmgd
->auth_data
->timeout_started
= true;
2939 run_again(ifmgd
, auth_data
->timeout
);
2941 auth_data
->timeout_started
= false;
2947 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2949 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2950 struct ieee80211_local
*local
= sdata
->local
;
2952 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2954 assoc_data
->tries
++;
2955 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2956 sdata_info(sdata
, "association with %pM timed out\n",
2957 assoc_data
->bss
->bssid
);
2960 * Most likely AP is not in the range so remove the
2961 * bss struct for that AP.
2963 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2968 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2969 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2970 IEEE80211_ASSOC_MAX_TRIES
);
2971 ieee80211_send_assoc(sdata
);
2973 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
2974 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2975 assoc_data
->timeout_started
= true;
2976 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2978 assoc_data
->timeout_started
= false;
2984 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
2985 __le16 fc
, bool acked
)
2987 struct ieee80211_local
*local
= sdata
->local
;
2989 sdata
->u
.mgd
.status_fc
= fc
;
2990 sdata
->u
.mgd
.status_acked
= acked
;
2991 sdata
->u
.mgd
.status_received
= true;
2993 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2996 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2998 struct ieee80211_local
*local
= sdata
->local
;
2999 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3001 mutex_lock(&ifmgd
->mtx
);
3003 if (ifmgd
->status_received
) {
3004 __le16 fc
= ifmgd
->status_fc
;
3005 bool status_acked
= ifmgd
->status_acked
;
3007 ifmgd
->status_received
= false;
3008 if (ifmgd
->auth_data
&&
3009 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3011 ifmgd
->auth_data
->timeout
=
3012 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3013 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3015 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3017 ifmgd
->auth_data
->timeout_started
= true;
3018 } else if (ifmgd
->assoc_data
&&
3019 (ieee80211_is_assoc_req(fc
) ||
3020 ieee80211_is_reassoc_req(fc
))) {
3022 ifmgd
->assoc_data
->timeout
=
3023 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3024 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3026 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3028 ifmgd
->assoc_data
->timeout_started
= true;
3032 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3033 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3034 if (ifmgd
->auth_data
->done
) {
3036 * ok ... we waited for assoc but userspace didn't,
3037 * so let's just kill the auth data
3039 ieee80211_destroy_auth_data(sdata
, false);
3040 } else if (ieee80211_probe_auth(sdata
)) {
3043 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3045 ieee80211_destroy_auth_data(sdata
, false);
3047 mutex_unlock(&ifmgd
->mtx
);
3048 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
3049 mutex_lock(&ifmgd
->mtx
);
3051 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3052 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3054 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3055 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3056 if ((ifmgd
->assoc_data
->need_beacon
&&
3057 !ifmgd
->assoc_data
->have_beacon
) ||
3058 ieee80211_do_assoc(sdata
)) {
3061 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3063 ieee80211_destroy_assoc_data(sdata
, false);
3065 mutex_unlock(&ifmgd
->mtx
);
3066 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3067 mutex_lock(&ifmgd
->mtx
);
3069 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3070 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3072 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3073 IEEE80211_STA_CONNECTION_POLL
) &&
3074 ifmgd
->associated
) {
3078 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3080 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3081 max_tries
= max_nullfunc_tries
;
3083 max_tries
= max_probe_tries
;
3085 /* ACK received for nullfunc probing frame */
3086 if (!ifmgd
->probe_send_count
)
3087 ieee80211_reset_ap_probe(sdata
);
3088 else if (ifmgd
->nullfunc_failed
) {
3089 if (ifmgd
->probe_send_count
< max_tries
) {
3091 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3092 bssid
, ifmgd
->probe_send_count
,
3094 ieee80211_mgd_probe_ap_send(sdata
);
3097 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3099 ieee80211_sta_connection_lost(sdata
, bssid
,
3100 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3103 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3104 run_again(ifmgd
, ifmgd
->probe_timeout
);
3105 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3107 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3108 bssid
, probe_wait_ms
);
3109 ieee80211_sta_connection_lost(sdata
, bssid
,
3110 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3111 } else if (ifmgd
->probe_send_count
< max_tries
) {
3113 "No probe response from AP %pM after %dms, try %d/%i\n",
3114 bssid
, probe_wait_ms
,
3115 ifmgd
->probe_send_count
, max_tries
);
3116 ieee80211_mgd_probe_ap_send(sdata
);
3119 * We actually lost the connection ... or did we?
3122 wiphy_debug(local
->hw
.wiphy
,
3123 "%s: No probe response from AP %pM"
3124 " after %dms, disconnecting.\n",
3126 bssid
, probe_wait_ms
);
3128 ieee80211_sta_connection_lost(sdata
, bssid
,
3129 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3133 mutex_unlock(&ifmgd
->mtx
);
3136 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3138 struct ieee80211_sub_if_data
*sdata
=
3139 (struct ieee80211_sub_if_data
*) data
;
3140 struct ieee80211_local
*local
= sdata
->local
;
3142 if (local
->quiescing
)
3145 sdata
->u
.mgd
.connection_loss
= false;
3146 ieee80211_queue_work(&sdata
->local
->hw
,
3147 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3150 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3152 struct ieee80211_sub_if_data
*sdata
=
3153 (struct ieee80211_sub_if_data
*) data
;
3154 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3155 struct ieee80211_local
*local
= sdata
->local
;
3157 if (local
->quiescing
)
3160 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3163 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3165 struct ieee80211_sub_if_data
*sdata
=
3166 container_of(work
, struct ieee80211_sub_if_data
,
3167 u
.mgd
.monitor_work
);
3169 ieee80211_mgd_probe_ap(sdata
, false);
3172 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3176 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3177 __ieee80211_stop_poll(sdata
);
3179 /* let's probe the connection once */
3180 flags
= sdata
->local
->hw
.flags
;
3181 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3182 ieee80211_queue_work(&sdata
->local
->hw
,
3183 &sdata
->u
.mgd
.monitor_work
);
3184 /* and do all the other regular work too */
3185 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3190 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
3192 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3195 * we need to use atomic bitops for the running bits
3196 * only because both timers might fire at the same
3197 * time -- the code here is properly synchronised.
3200 cancel_work_sync(&ifmgd
->request_smps_work
);
3202 cancel_work_sync(&ifmgd
->monitor_work
);
3203 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3204 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3205 if (del_timer_sync(&ifmgd
->timer
))
3206 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3208 cancel_work_sync(&ifmgd
->chswitch_work
);
3209 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3210 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3212 /* these will just be re-established on connection */
3213 del_timer_sync(&ifmgd
->conn_mon_timer
);
3214 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3217 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3219 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3221 mutex_lock(&ifmgd
->mtx
);
3222 if (!ifmgd
->associated
) {
3223 mutex_unlock(&ifmgd
->mtx
);
3227 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3228 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3229 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3230 ieee80211_sta_connection_lost(sdata
,
3231 ifmgd
->associated
->bssid
,
3232 WLAN_REASON_UNSPECIFIED
,
3234 mutex_unlock(&ifmgd
->mtx
);
3237 mutex_unlock(&ifmgd
->mtx
);
3239 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3240 add_timer(&ifmgd
->timer
);
3241 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3242 add_timer(&ifmgd
->chswitch_timer
);
3243 ieee80211_sta_reset_beacon_monitor(sdata
);
3245 mutex_lock(&sdata
->local
->mtx
);
3246 ieee80211_restart_sta_timer(sdata
);
3247 mutex_unlock(&sdata
->local
->mtx
);
3251 /* interface setup */
3252 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3254 struct ieee80211_if_managed
*ifmgd
;
3256 ifmgd
= &sdata
->u
.mgd
;
3257 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3258 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3259 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3260 ieee80211_beacon_connection_loss_work
);
3261 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3262 ieee80211_csa_connection_drop_work
);
3263 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3264 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3265 (unsigned long) sdata
);
3266 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3267 (unsigned long) sdata
);
3268 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3269 (unsigned long) sdata
);
3270 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3271 (unsigned long) sdata
);
3274 ifmgd
->powersave
= sdata
->wdev
.ps
;
3275 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3276 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3278 mutex_init(&ifmgd
->mtx
);
3280 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3281 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3283 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3286 /* scan finished notification */
3287 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3289 struct ieee80211_sub_if_data
*sdata
;
3291 /* Restart STA timers */
3293 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3294 ieee80211_restart_sta_timer(sdata
);
3298 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3299 unsigned long data
, void *dummy
)
3301 s32 latency_usec
= (s32
) data
;
3302 struct ieee80211_local
*local
=
3303 container_of(nb
, struct ieee80211_local
,
3304 network_latency_notifier
);
3306 mutex_lock(&local
->iflist_mtx
);
3307 ieee80211_recalc_ps(local
, latency_usec
);
3308 mutex_unlock(&local
->iflist_mtx
);
3313 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
3319 case NL80211_CHAN_WIDTH_20
:
3320 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3321 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3323 case NL80211_CHAN_WIDTH_40
:
3324 c
->width
= NL80211_CHAN_WIDTH_20
;
3325 c
->center_freq1
= c
->chan
->center_freq
;
3326 ret
= IEEE80211_STA_DISABLE_40MHZ
|
3327 IEEE80211_STA_DISABLE_VHT
;
3329 case NL80211_CHAN_WIDTH_80
:
3330 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3334 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
3335 c
->width
= NL80211_CHAN_WIDTH_40
;
3336 ret
= IEEE80211_STA_DISABLE_VHT
;
3338 case NL80211_CHAN_WIDTH_80P80
:
3339 c
->center_freq2
= 0;
3340 c
->width
= NL80211_CHAN_WIDTH_80
;
3341 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3342 IEEE80211_STA_DISABLE_160MHZ
;
3344 case NL80211_CHAN_WIDTH_160
:
3346 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3349 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
3350 c
->width
= NL80211_CHAN_WIDTH_80
;
3351 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3352 IEEE80211_STA_DISABLE_160MHZ
;
3355 case NL80211_CHAN_WIDTH_20_NOHT
:
3357 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3358 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3362 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
3368 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
3369 struct ieee80211_supported_band
*sband
,
3370 struct ieee80211_channel
*channel
,
3371 const struct ieee80211_ht_operation
*ht_oper
,
3372 const struct ieee80211_vht_operation
*vht_oper
,
3373 struct cfg80211_chan_def
*chandef
)
3375 struct cfg80211_chan_def vht_chandef
;
3378 chandef
->chan
= channel
;
3379 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3380 chandef
->center_freq1
= channel
->center_freq
;
3381 chandef
->center_freq2
= 0;
3383 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
3384 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3388 chandef
->width
= NL80211_CHAN_WIDTH_20
;
3390 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3392 /* check that channel matches the right operating channel */
3393 if (channel
->center_freq
!= ht_cfreq
) {
3395 * It's possible that some APs are confused here;
3396 * Netgear WNDR3700 sometimes reports 4 higher than
3397 * the actual channel in association responses, but
3398 * since we look at probe response/beacon data here
3402 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3403 channel
->center_freq
, ht_cfreq
,
3404 ht_oper
->primary_chan
, channel
->band
);
3405 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3409 /* check 40 MHz support, if we have it */
3410 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3411 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3412 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3413 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3414 chandef
->center_freq1
+= 10;
3416 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3417 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3418 chandef
->center_freq1
-= 10;
3422 /* 40 MHz (and 80 MHz) must be supported for VHT */
3423 ret
= IEEE80211_STA_DISABLE_VHT
;
3427 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
3428 ret
= IEEE80211_STA_DISABLE_VHT
;
3432 vht_chandef
.chan
= channel
;
3433 vht_chandef
.center_freq1
=
3434 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
3436 vht_chandef
.center_freq2
= 0;
3438 if (vht_oper
->center_freq_seg2_idx
)
3439 vht_chandef
.center_freq2
=
3440 ieee80211_channel_to_frequency(
3441 vht_oper
->center_freq_seg2_idx
,
3444 switch (vht_oper
->chan_width
) {
3445 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
3446 vht_chandef
.width
= chandef
->width
;
3448 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
3449 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
3451 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
3452 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
3454 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
3455 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
3459 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3460 vht_oper
->chan_width
);
3461 ret
= IEEE80211_STA_DISABLE_VHT
;
3465 if (!cfg80211_chandef_valid(&vht_chandef
)) {
3467 "AP VHT information is invalid, disable VHT\n");
3468 ret
= IEEE80211_STA_DISABLE_VHT
;
3472 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
3477 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
3479 "AP VHT information doesn't match HT, disable VHT\n");
3480 ret
= IEEE80211_STA_DISABLE_VHT
;
3484 *chandef
= vht_chandef
;
3489 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
3490 IEEE80211_CHAN_DISABLED
)) {
3491 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
3492 ret
= IEEE80211_STA_DISABLE_HT
|
3493 IEEE80211_STA_DISABLE_VHT
;
3497 ret
|= chandef_downgrade(chandef
);
3500 if (chandef
->width
!= vht_chandef
.width
)
3502 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
3504 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
3508 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3509 struct cfg80211_bss
*cbss
)
3511 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3512 const u8
*ht_cap_ie
, *vht_cap_ie
;
3513 const struct ieee80211_ht_cap
*ht_cap
;
3514 const struct ieee80211_vht_cap
*vht_cap
;
3517 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3520 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3521 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3522 ht_cap
= (void *)(ht_cap_ie
+ 2);
3523 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3525 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3526 * "Tx Unequal Modulation Supported" fields.
3530 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3533 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3534 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3538 vht_cap
= (void *)(vht_cap_ie
+ 2);
3539 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3540 for (nss
= 8; nss
> 0; nss
--) {
3541 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3542 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3545 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3546 chains
= max(chains
, nss
);
3552 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3553 struct cfg80211_bss
*cbss
)
3555 struct ieee80211_local
*local
= sdata
->local
;
3556 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3557 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3558 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3559 struct ieee80211_supported_band
*sband
;
3560 struct cfg80211_chan_def chandef
;
3563 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3565 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3566 IEEE80211_STA_DISABLE_80P80MHZ
|
3567 IEEE80211_STA_DISABLE_160MHZ
);
3571 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3572 sband
->ht_cap
.ht_supported
) {
3573 const u8
*ht_oper_ie
;
3575 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3576 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3577 ht_oper
= (void *)(ht_oper_ie
+ 2);
3580 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3581 sband
->vht_cap
.vht_supported
) {
3582 const u8
*vht_oper_ie
;
3584 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3585 WLAN_EID_VHT_OPERATION
);
3586 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3587 vht_oper
= (void *)(vht_oper_ie
+ 2);
3588 if (vht_oper
&& !ht_oper
) {
3591 "AP advertised VHT without HT, disabling both\n");
3592 sdata
->flags
|= IEEE80211_STA_DISABLE_HT
;
3593 sdata
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3597 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3602 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3607 /* will change later if needed */
3608 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3611 * If this fails (possibly due to channel context sharing
3612 * on incompatible channels, e.g. 80+80 and 160 sharing the
3613 * same control channel) try to use a smaller bandwidth.
3615 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3616 IEEE80211_CHANCTX_SHARED
);
3617 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3618 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3619 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3620 IEEE80211_CHANCTX_SHARED
);
3625 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3626 struct cfg80211_bss
*cbss
, bool assoc
)
3628 struct ieee80211_local
*local
= sdata
->local
;
3629 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3630 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3631 struct sta_info
*new_sta
= NULL
;
3632 bool have_sta
= false;
3635 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3640 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3645 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3651 u32 rates
= 0, basic_rates
= 0;
3652 bool have_higher_than_11mbit
;
3653 int min_rate
= INT_MAX
, min_rate_index
= -1;
3654 struct ieee80211_supported_band
*sband
;
3655 const struct cfg80211_bss_ies
*ies
;
3657 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3659 err
= ieee80211_prep_channel(sdata
, cbss
);
3661 sta_info_free(local
, new_sta
);
3665 ieee80211_get_rates(sband
, bss
->supp_rates
,
3666 bss
->supp_rates_len
,
3667 &rates
, &basic_rates
,
3668 &have_higher_than_11mbit
,
3669 &min_rate
, &min_rate_index
);
3672 * This used to be a workaround for basic rates missing
3673 * in the association response frame. Now that we no
3674 * longer use the basic rates from there, it probably
3675 * doesn't happen any more, but keep the workaround so
3676 * in case some *other* APs are buggy in different ways
3677 * we can connect -- with a warning.
3679 if (!basic_rates
&& min_rate_index
>= 0) {
3681 "No basic rates, using min rate instead\n");
3682 basic_rates
= BIT(min_rate_index
);
3685 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3686 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3688 /* cf. IEEE 802.11 9.2.12 */
3689 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3690 have_higher_than_11mbit
)
3691 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3693 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3695 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3697 /* set timing information */
3698 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3700 ies
= rcu_dereference(cbss
->beacon_ies
);
3704 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3705 sdata
->vif
.bss_conf
.sync_device_ts
=
3706 bss
->device_ts_beacon
;
3707 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3708 ies
->data
, ies
->len
);
3709 if (tim_ie
&& tim_ie
[1] >= 2)
3710 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3712 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3713 } else if (!(local
->hw
.flags
&
3714 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3715 ies
= rcu_dereference(cbss
->proberesp_ies
);
3716 /* must be non-NULL since beacon IEs were NULL */
3717 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3718 sdata
->vif
.bss_conf
.sync_device_ts
=
3719 bss
->device_ts_presp
;
3720 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3722 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3723 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3724 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3728 /* tell driver about BSSID, basic rates and timing */
3729 ieee80211_bss_info_change_notify(sdata
,
3730 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3731 BSS_CHANGED_BEACON_INT
);
3734 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3736 err
= sta_info_insert(new_sta
);
3740 "failed to insert STA entry for the AP (error %d)\n",
3745 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3751 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3752 struct cfg80211_auth_request
*req
)
3754 struct ieee80211_local
*local
= sdata
->local
;
3755 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3756 struct ieee80211_mgd_auth_data
*auth_data
;
3760 /* prepare auth data structure */
3762 switch (req
->auth_type
) {
3763 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3764 auth_alg
= WLAN_AUTH_OPEN
;
3766 case NL80211_AUTHTYPE_SHARED_KEY
:
3767 if (IS_ERR(local
->wep_tx_tfm
))
3769 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3771 case NL80211_AUTHTYPE_FT
:
3772 auth_alg
= WLAN_AUTH_FT
;
3774 case NL80211_AUTHTYPE_NETWORK_EAP
:
3775 auth_alg
= WLAN_AUTH_LEAP
;
3777 case NL80211_AUTHTYPE_SAE
:
3778 auth_alg
= WLAN_AUTH_SAE
;
3784 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3785 req
->ie_len
, GFP_KERNEL
);
3789 auth_data
->bss
= req
->bss
;
3791 if (req
->sae_data_len
>= 4) {
3792 __le16
*pos
= (__le16
*) req
->sae_data
;
3793 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3794 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3795 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3796 req
->sae_data_len
- 4);
3797 auth_data
->data_len
+= req
->sae_data_len
- 4;
3800 if (req
->ie
&& req
->ie_len
) {
3801 memcpy(&auth_data
->data
[auth_data
->data_len
],
3802 req
->ie
, req
->ie_len
);
3803 auth_data
->data_len
+= req
->ie_len
;
3806 if (req
->key
&& req
->key_len
) {
3807 auth_data
->key_len
= req
->key_len
;
3808 auth_data
->key_idx
= req
->key_idx
;
3809 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3812 auth_data
->algorithm
= auth_alg
;
3814 /* try to authenticate/probe */
3816 mutex_lock(&ifmgd
->mtx
);
3818 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3819 ifmgd
->assoc_data
) {
3824 if (ifmgd
->auth_data
)
3825 ieee80211_destroy_auth_data(sdata
, false);
3827 /* prep auth_data so we don't go into idle on disassoc */
3828 ifmgd
->auth_data
= auth_data
;
3830 if (ifmgd
->associated
)
3831 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3833 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3835 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3839 err
= ieee80211_probe_auth(sdata
);
3841 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3845 /* hold our own reference */
3846 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
3851 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3852 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3853 ifmgd
->auth_data
= NULL
;
3857 mutex_unlock(&ifmgd
->mtx
);
3862 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3863 struct cfg80211_assoc_request
*req
)
3865 struct ieee80211_local
*local
= sdata
->local
;
3866 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3867 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3868 struct ieee80211_mgd_assoc_data
*assoc_data
;
3869 const struct cfg80211_bss_ies
*beacon_ies
;
3870 struct ieee80211_supported_band
*sband
;
3871 const u8
*ssidie
, *ht_ie
, *vht_ie
;
3874 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3879 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3885 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3886 assoc_data
->ssid_len
= ssidie
[1];
3889 mutex_lock(&ifmgd
->mtx
);
3891 if (ifmgd
->associated
)
3892 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3894 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3899 if (ifmgd
->assoc_data
) {
3904 if (ifmgd
->auth_data
) {
3907 /* keep sta info, bssid if matching */
3908 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3909 ieee80211_destroy_auth_data(sdata
, match
);
3912 /* prepare assoc data */
3914 ifmgd
->beacon_crc_valid
= false;
3917 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3918 * We still associate in non-HT mode (11a/b/g) if any one of these
3919 * ciphers is configured as pairwise.
3920 * We can set this to true for non-11n hardware, that'll be checked
3921 * separately along with the peer capabilities.
3923 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3924 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3925 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3926 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3927 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3928 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3929 netdev_info(sdata
->dev
,
3930 "disabling HT/VHT due to WEP/TKIP use\n");
3934 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3935 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3936 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3939 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3940 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3941 if (!sband
->ht_cap
.ht_supported
||
3942 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3943 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3945 netdev_info(sdata
->dev
,
3946 "disabling HT as WMM/QoS is not supported by the AP\n");
3949 /* disable VHT if we don't support it or the AP doesn't use WMM */
3950 if (!sband
->vht_cap
.vht_supported
||
3951 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3952 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3954 netdev_info(sdata
->dev
,
3955 "disabling VHT as WMM/QoS is not supported by the AP\n");
3958 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3959 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3960 sizeof(ifmgd
->ht_capa_mask
));
3962 if (req
->ie
&& req
->ie_len
) {
3963 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3964 assoc_data
->ie_len
= req
->ie_len
;
3967 assoc_data
->bss
= req
->bss
;
3969 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3970 if (ifmgd
->powersave
)
3971 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3973 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3975 sdata
->smps_mode
= ifmgd
->req_smps
;
3977 assoc_data
->capability
= req
->bss
->capability
;
3978 assoc_data
->wmm
= bss
->wmm_used
&&
3979 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3980 assoc_data
->supp_rates
= bss
->supp_rates
;
3981 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3984 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3985 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3986 assoc_data
->ap_ht_param
=
3987 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3989 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3990 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
3991 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
3992 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
3993 sizeof(struct ieee80211_vht_cap
));
3995 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3998 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3999 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
4000 assoc_data
->uapsd
= true;
4001 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4003 assoc_data
->uapsd
= false;
4004 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4007 if (req
->prev_bssid
)
4008 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4011 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4012 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4014 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4015 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4018 if (req
->crypto
.control_port
)
4019 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4021 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4023 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4024 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4026 /* kick off associate process */
4028 ifmgd
->assoc_data
= assoc_data
;
4029 ifmgd
->dtim_period
= 0;
4031 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4036 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4038 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4041 * Wait up to one beacon interval ...
4042 * should this be more if we miss one?
4044 sdata_info(sdata
, "waiting for beacon from %pM\n",
4046 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4047 assoc_data
->timeout_started
= true;
4048 assoc_data
->need_beacon
= true;
4049 } else if (beacon_ies
) {
4050 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4055 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4056 const struct ieee80211_tim_ie
*tim
;
4057 tim
= (void *)(tim_ie
+ 2);
4058 ifmgd
->dtim_period
= tim
->dtim_period
;
4059 dtim_count
= tim
->dtim_count
;
4061 assoc_data
->have_beacon
= true;
4062 assoc_data
->timeout
= jiffies
;
4063 assoc_data
->timeout_started
= true;
4065 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4066 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4067 sdata
->vif
.bss_conf
.sync_device_ts
=
4068 bss
->device_ts_beacon
;
4069 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4072 assoc_data
->timeout
= jiffies
;
4073 assoc_data
->timeout_started
= true;
4077 run_again(ifmgd
, assoc_data
->timeout
);
4079 if (bss
->corrupt_data
) {
4080 char *corrupt_type
= "data";
4081 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4082 if (bss
->corrupt_data
&
4083 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4084 corrupt_type
= "beacon and probe response";
4086 corrupt_type
= "beacon";
4087 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4088 corrupt_type
= "probe response";
4089 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4096 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4097 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4098 ifmgd
->assoc_data
= NULL
;
4102 mutex_unlock(&ifmgd
->mtx
);
4107 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4108 struct cfg80211_deauth_request
*req
)
4110 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4111 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4112 bool tx
= !req
->local_state_change
;
4113 bool sent_frame
= false;
4115 mutex_lock(&ifmgd
->mtx
);
4118 "deauthenticating from %pM by local choice (reason=%d)\n",
4119 req
->bssid
, req
->reason_code
);
4121 if (ifmgd
->auth_data
) {
4122 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4123 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4124 IEEE80211_STYPE_DEAUTH
,
4125 req
->reason_code
, tx
,
4127 ieee80211_destroy_auth_data(sdata
, false);
4128 mutex_unlock(&ifmgd
->mtx
);
4134 if (ifmgd
->associated
&&
4135 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4136 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4137 req
->reason_code
, tx
, frame_buf
);
4140 mutex_unlock(&ifmgd
->mtx
);
4144 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4145 IEEE80211_DEAUTH_FRAME_LEN
);
4150 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4151 struct cfg80211_disassoc_request
*req
)
4153 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4155 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4157 mutex_lock(&ifmgd
->mtx
);
4160 * cfg80211 should catch this ... but it's racy since
4161 * we can receive a disassoc frame, process it, hand it
4162 * to cfg80211 while that's in a locked section already
4163 * trying to tell us that the user wants to disconnect.
4165 if (ifmgd
->associated
!= req
->bss
) {
4166 mutex_unlock(&ifmgd
->mtx
);
4171 "disassociating from %pM by local choice (reason=%d)\n",
4172 req
->bss
->bssid
, req
->reason_code
);
4174 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4175 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4176 req
->reason_code
, !req
->local_state_change
,
4178 mutex_unlock(&ifmgd
->mtx
);
4180 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4181 IEEE80211_DEAUTH_FRAME_LEN
);
4186 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4188 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4190 mutex_lock(&ifmgd
->mtx
);
4191 if (ifmgd
->assoc_data
)
4192 ieee80211_destroy_assoc_data(sdata
, false);
4193 if (ifmgd
->auth_data
)
4194 ieee80211_destroy_auth_data(sdata
, false);
4195 del_timer_sync(&ifmgd
->timer
);
4196 mutex_unlock(&ifmgd
->mtx
);
4199 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4200 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4203 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4205 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4207 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4209 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);