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
);
224 if (sta
&& !sta
->supports_40mhz
)
227 if (sta
&& (!reconfig
||
228 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
229 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
232 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
234 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
236 rate_control_rate_update(local
, sband
, sta
,
237 IEEE80211_RC_BW_CHANGED
);
239 mutex_unlock(&local
->sta_mtx
);
241 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
243 /* if bss configuration changed store the new one */
244 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
245 changed
|= BSS_CHANGED_HT
;
246 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
252 /* frame sending functions */
254 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
255 struct ieee80211_supported_band
*sband
,
261 for (i
= 0; i
< supp_rates_len
; i
++) {
262 int rate
= (supp_rates
[i
] & 0x7F) * 5;
264 for (j
= 0; j
< sband
->n_bitrates
; j
++)
265 if (sband
->bitrates
[j
].bitrate
== rate
) {
275 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
276 struct sk_buff
*skb
, u8 ap_ht_param
,
277 struct ieee80211_supported_band
*sband
,
278 struct ieee80211_channel
*channel
,
279 enum ieee80211_smps_mode smps
)
282 u32 flags
= channel
->flags
;
284 struct ieee80211_sta_ht_cap ht_cap
;
286 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
288 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
289 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
291 /* determine capability flags */
294 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
295 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
296 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
297 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
298 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
301 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
302 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
303 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
304 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
310 * If 40 MHz was disabled associate as though we weren't
311 * capable of 40 MHz -- some broken APs will never fall
312 * back to trying to transmit in 20 MHz.
314 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
315 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
316 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
319 /* set SM PS mode properly */
320 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
322 case IEEE80211_SMPS_AUTOMATIC
:
323 case IEEE80211_SMPS_NUM_MODES
:
325 case IEEE80211_SMPS_OFF
:
326 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
327 IEEE80211_HT_CAP_SM_PS_SHIFT
;
329 case IEEE80211_SMPS_STATIC
:
330 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
331 IEEE80211_HT_CAP_SM_PS_SHIFT
;
333 case IEEE80211_SMPS_DYNAMIC
:
334 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
335 IEEE80211_HT_CAP_SM_PS_SHIFT
;
339 /* reserve and fill IE */
340 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
341 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
344 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
346 struct ieee80211_supported_band
*sband
,
347 struct ieee80211_vht_cap
*ap_vht_cap
)
351 struct ieee80211_sta_vht_cap vht_cap
;
354 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
356 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
358 /* determine capability flags */
361 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
362 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
363 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
366 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
367 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
368 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
372 * Some APs apparently get confused if our capabilities are better
373 * than theirs, so restrict what we advertise in the assoc request.
375 if (!(ap_vht_cap
->vht_cap_info
&
376 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
377 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
379 if (!(ap_vht_cap
->vht_cap_info
&
380 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC
)))
381 cap
&= ~(IEEE80211_VHT_CAP_RXSTBC_1
|
382 IEEE80211_VHT_CAP_RXSTBC_3
|
383 IEEE80211_VHT_CAP_RXSTBC_4
);
385 for (i
= 0; i
< 8; i
++) {
387 u16 mask
= IEEE80211_VHT_MCS_NOT_SUPPORTED
<< shift
;
390 ap_mcs
= (le16_to_cpu(ap_vht_cap
->supp_mcs
.tx_mcs_map
) &
392 our_mcs
= (le16_to_cpu(vht_cap
.vht_mcs
.rx_mcs_map
) &
397 if (our_mcs
<= ap_mcs
)
400 case IEEE80211_VHT_MCS_NOT_SUPPORTED
:
401 vht_cap
.vht_mcs
.rx_mcs_map
&= cpu_to_le16(~mask
);
402 vht_cap
.vht_mcs
.rx_mcs_map
|=
403 cpu_to_le16(ap_mcs
<< shift
);
407 /* reserve and fill IE */
408 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
409 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
412 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
414 struct ieee80211_local
*local
= sdata
->local
;
415 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
416 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
418 struct ieee80211_mgmt
*mgmt
;
420 size_t offset
= 0, noffset
;
421 int i
, count
, rates_len
, supp_rates_len
;
423 struct ieee80211_supported_band
*sband
;
424 struct ieee80211_chanctx_conf
*chanctx_conf
;
425 struct ieee80211_channel
*chan
;
428 lockdep_assert_held(&ifmgd
->mtx
);
431 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
432 if (WARN_ON(!chanctx_conf
)) {
436 chan
= chanctx_conf
->def
.chan
;
438 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
440 if (assoc_data
->supp_rates_len
) {
442 * Get all rates supported by the device and the AP as
443 * some APs don't like getting a superset of their rates
444 * in the association request (e.g. D-Link DAP 1353 in
447 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
448 assoc_data
->supp_rates_len
,
452 * In case AP not provide any supported rates information
453 * before association, we send information element(s) with
454 * all rates that we support.
457 rates_len
= sband
->n_bitrates
;
460 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
461 sizeof(*mgmt
) + /* bit too much but doesn't matter */
462 2 + assoc_data
->ssid_len
+ /* SSID */
463 4 + rates_len
+ /* (extended) rates */
464 4 + /* power capability */
465 2 + 2 * sband
->n_channels
+ /* supported channels */
466 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
467 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
468 assoc_data
->ie_len
+ /* extra IEs */
474 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
476 capab
= WLAN_CAPABILITY_ESS
;
478 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
479 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
480 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
481 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
482 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
485 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
486 capab
|= WLAN_CAPABILITY_PRIVACY
;
488 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
489 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
490 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
492 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
494 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
495 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
496 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
498 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
500 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
501 IEEE80211_STYPE_REASSOC_REQ
);
502 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
503 mgmt
->u
.reassoc_req
.listen_interval
=
504 cpu_to_le16(local
->hw
.conf
.listen_interval
);
505 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
509 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
510 IEEE80211_STYPE_ASSOC_REQ
);
511 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
512 mgmt
->u
.assoc_req
.listen_interval
=
513 cpu_to_le16(local
->hw
.conf
.listen_interval
);
517 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
518 *pos
++ = WLAN_EID_SSID
;
519 *pos
++ = assoc_data
->ssid_len
;
520 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
522 /* add all rates which were marked to be used above */
523 supp_rates_len
= rates_len
;
524 if (supp_rates_len
> 8)
527 pos
= skb_put(skb
, supp_rates_len
+ 2);
528 *pos
++ = WLAN_EID_SUPP_RATES
;
529 *pos
++ = supp_rates_len
;
532 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
533 if (BIT(i
) & rates
) {
534 int rate
= sband
->bitrates
[i
].bitrate
;
535 *pos
++ = (u8
) (rate
/ 5);
541 if (rates_len
> count
) {
542 pos
= skb_put(skb
, rates_len
- count
+ 2);
543 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
544 *pos
++ = rates_len
- count
;
546 for (i
++; i
< sband
->n_bitrates
; i
++) {
547 if (BIT(i
) & rates
) {
548 int rate
= sband
->bitrates
[i
].bitrate
;
549 *pos
++ = (u8
) (rate
/ 5);
554 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
555 /* 1. power capabilities */
556 pos
= skb_put(skb
, 4);
557 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
559 *pos
++ = 0; /* min tx power */
560 *pos
++ = chan
->max_power
; /* max tx power */
562 /* 2. supported channels */
563 /* TODO: get this in reg domain format */
564 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
565 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
566 *pos
++ = 2 * sband
->n_channels
;
567 for (i
= 0; i
< sband
->n_channels
; i
++) {
568 *pos
++ = ieee80211_frequency_to_channel(
569 sband
->channels
[i
].center_freq
);
570 *pos
++ = 1; /* one channel in the subband*/
574 /* if present, add any custom IEs that go before HT */
575 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
576 static const u8 before_ht
[] = {
579 WLAN_EID_EXT_SUPP_RATES
,
580 WLAN_EID_PWR_CAPABILITY
,
581 WLAN_EID_SUPPORTED_CHANNELS
,
584 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
585 WLAN_EID_MOBILITY_DOMAIN
,
586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
588 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
589 before_ht
, ARRAY_SIZE(before_ht
),
591 pos
= skb_put(skb
, noffset
- offset
);
592 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
596 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
597 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
598 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
600 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
601 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
602 sband
, chan
, sdata
->smps_mode
);
604 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
605 ieee80211_add_vht_ie(sdata
, skb
, sband
,
606 &assoc_data
->ap_vht_cap
);
608 /* if present, add any custom non-vendor IEs that go after HT */
609 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
610 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
613 pos
= skb_put(skb
, noffset
- offset
);
614 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
618 if (assoc_data
->wmm
) {
619 if (assoc_data
->uapsd
) {
620 qos_info
= ifmgd
->uapsd_queues
;
621 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
622 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
627 pos
= skb_put(skb
, 9);
628 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
629 *pos
++ = 7; /* len */
630 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
633 *pos
++ = 2; /* WME */
634 *pos
++ = 0; /* WME info */
635 *pos
++ = 1; /* WME ver */
639 /* add any remaining custom (i.e. vendor specific here) IEs */
640 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
641 noffset
= assoc_data
->ie_len
;
642 pos
= skb_put(skb
, noffset
- offset
);
643 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
646 drv_mgd_prepare_tx(local
, sdata
);
648 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
649 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
650 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
651 IEEE80211_TX_INTFL_MLME_CONN_TX
;
652 ieee80211_tx_skb(sdata
, skb
);
655 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
656 struct ieee80211_sub_if_data
*sdata
)
658 struct ieee80211_pspoll
*pspoll
;
661 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
665 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
666 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
668 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
669 ieee80211_tx_skb(sdata
, skb
);
672 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
673 struct ieee80211_sub_if_data
*sdata
,
677 struct ieee80211_hdr_3addr
*nullfunc
;
678 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
680 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
684 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
686 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
688 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
689 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
690 IEEE80211_STA_CONNECTION_POLL
))
691 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
693 ieee80211_tx_skb(sdata
, skb
);
696 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
697 struct ieee80211_sub_if_data
*sdata
)
700 struct ieee80211_hdr
*nullfunc
;
703 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
706 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
710 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
712 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
713 memset(nullfunc
, 0, 30);
714 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
715 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
716 nullfunc
->frame_control
= fc
;
717 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
718 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
719 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
720 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
722 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
723 ieee80211_tx_skb(sdata
, skb
);
726 /* spectrum management related things */
727 static void ieee80211_chswitch_work(struct work_struct
*work
)
729 struct ieee80211_sub_if_data
*sdata
=
730 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
731 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
733 if (!ieee80211_sdata_running(sdata
))
736 mutex_lock(&ifmgd
->mtx
);
737 if (!ifmgd
->associated
)
740 sdata
->local
->_oper_channel
= sdata
->local
->csa_channel
;
741 if (!sdata
->local
->ops
->channel_switch
) {
742 /* call "hw_config" only if doing sw channel switch */
743 ieee80211_hw_config(sdata
->local
,
744 IEEE80211_CONF_CHANGE_CHANNEL
);
746 /* update the device channel directly */
747 sdata
->local
->hw
.conf
.channel
= sdata
->local
->_oper_channel
;
750 /* XXX: shouldn't really modify cfg80211-owned data! */
751 ifmgd
->associated
->channel
= sdata
->local
->_oper_channel
;
753 /* XXX: wait for a beacon first? */
754 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
755 IEEE80211_QUEUE_STOP_REASON_CSA
);
757 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
758 mutex_unlock(&ifmgd
->mtx
);
761 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
763 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
764 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
766 trace_api_chswitch_done(sdata
, success
);
769 "driver channel switch failed, disconnecting\n");
770 ieee80211_queue_work(&sdata
->local
->hw
,
771 &ifmgd
->csa_connection_drop_work
);
773 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
776 EXPORT_SYMBOL(ieee80211_chswitch_done
);
778 static void ieee80211_chswitch_timer(unsigned long data
)
780 struct ieee80211_sub_if_data
*sdata
=
781 (struct ieee80211_sub_if_data
*) data
;
782 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
784 if (sdata
->local
->quiescing
) {
785 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
789 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
792 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
793 struct ieee80211_channel_sw_ie
*sw_elem
,
794 struct ieee80211_bss
*bss
,
797 struct cfg80211_bss
*cbss
=
798 container_of((void *)bss
, struct cfg80211_bss
, priv
);
799 struct ieee80211_channel
*new_ch
;
800 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
801 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
802 cbss
->channel
->band
);
803 struct ieee80211_chanctx
*chanctx
;
805 ASSERT_MGD_MTX(ifmgd
);
807 if (!ifmgd
->associated
)
810 if (sdata
->local
->scanning
)
813 /* Disregard subsequent beacons if we are already running a timer
816 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
819 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
820 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
822 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
823 ifmgd
->associated
->bssid
, new_freq
);
824 ieee80211_queue_work(&sdata
->local
->hw
,
825 &ifmgd
->csa_connection_drop_work
);
829 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
831 if (sdata
->local
->use_chanctx
) {
833 "not handling channel switch with channel contexts\n");
834 ieee80211_queue_work(&sdata
->local
->hw
,
835 &ifmgd
->csa_connection_drop_work
);
839 mutex_lock(&sdata
->local
->chanctx_mtx
);
840 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
841 mutex_unlock(&sdata
->local
->chanctx_mtx
);
844 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
845 struct ieee80211_chanctx
, conf
);
846 if (chanctx
->refcount
> 1) {
848 "channel switch with multiple interfaces on the same channel, disconnecting\n");
849 ieee80211_queue_work(&sdata
->local
->hw
,
850 &ifmgd
->csa_connection_drop_work
);
851 mutex_unlock(&sdata
->local
->chanctx_mtx
);
854 mutex_unlock(&sdata
->local
->chanctx_mtx
);
856 sdata
->local
->csa_channel
= new_ch
;
859 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
860 IEEE80211_QUEUE_STOP_REASON_CSA
);
862 if (sdata
->local
->ops
->channel_switch
) {
863 /* use driver's channel switch callback */
864 struct ieee80211_channel_switch ch_switch
= {
865 .timestamp
= timestamp
,
866 .block_tx
= sw_elem
->mode
,
868 .count
= sw_elem
->count
,
871 drv_channel_switch(sdata
->local
, &ch_switch
);
875 /* channel switch handled in software */
876 if (sw_elem
->count
<= 1)
877 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
879 mod_timer(&ifmgd
->chswitch_timer
,
880 TU_TO_EXP_TIME(sw_elem
->count
*
881 cbss
->beacon_interval
));
884 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
885 struct ieee80211_channel
*channel
,
886 const u8
*country_ie
, u8 country_ie_len
,
887 const u8
*pwr_constr_elem
)
889 struct ieee80211_country_ie_triplet
*triplet
;
890 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
891 int i
, chan_pwr
, chan_increment
, new_ap_level
;
892 bool have_chan_pwr
= false;
895 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
898 triplet
= (void *)(country_ie
+ 3);
901 switch (channel
->band
) {
905 case IEEE80211_BAND_2GHZ
:
906 case IEEE80211_BAND_60GHZ
:
909 case IEEE80211_BAND_5GHZ
:
915 while (country_ie_len
>= 3) {
916 u8 first_channel
= triplet
->chans
.first_channel
;
918 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
921 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
922 if (first_channel
+ i
* chan_increment
== chan
) {
923 have_chan_pwr
= true;
924 chan_pwr
= triplet
->chans
.max_power
;
939 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
941 if (sdata
->ap_power_level
== new_ap_level
)
945 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
946 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
948 sdata
->ap_power_level
= new_ap_level
;
949 if (__ieee80211_recalc_txpower(sdata
))
950 return BSS_CHANGED_TXPOWER
;
954 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
956 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
957 struct ieee80211_local
*local
= sdata
->local
;
958 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
960 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
961 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
962 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
964 local
->disable_dynamic_ps
= false;
965 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
967 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
969 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
971 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
972 struct ieee80211_local
*local
= sdata
->local
;
973 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
975 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
976 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
977 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
979 local
->disable_dynamic_ps
= true;
980 conf
->dynamic_ps_timeout
= 0;
981 del_timer_sync(&local
->dynamic_ps_timer
);
982 ieee80211_queue_work(&local
->hw
,
983 &local
->dynamic_ps_enable_work
);
985 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
988 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
989 struct ieee80211_sub_if_data
*sdata
)
991 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
994 * If we are scanning right now then the parameters will
995 * take effect when scan finishes.
1000 if (conf
->dynamic_ps_timeout
> 0 &&
1001 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1002 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1003 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1005 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1006 ieee80211_send_nullfunc(local
, sdata
, 1);
1008 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1009 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1012 conf
->flags
|= IEEE80211_CONF_PS
;
1013 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1017 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1019 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1021 if (local
->ps_sdata
) {
1022 ieee80211_enable_ps(local
, local
->ps_sdata
);
1023 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1024 conf
->flags
&= ~IEEE80211_CONF_PS
;
1025 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1026 del_timer_sync(&local
->dynamic_ps_timer
);
1027 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1031 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1033 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1034 struct sta_info
*sta
= NULL
;
1035 bool authorized
= false;
1037 if (!mgd
->powersave
)
1043 if (!mgd
->associated
)
1046 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1047 IEEE80211_STA_CONNECTION_POLL
))
1051 sta
= sta_info_get(sdata
, mgd
->bssid
);
1053 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1059 /* need to hold RTNL or interface lock */
1060 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1062 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1066 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1067 local
->ps_sdata
= NULL
;
1071 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1072 if (!ieee80211_sdata_running(sdata
))
1074 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1075 /* If an AP vif is found, then disable PS
1076 * by setting the count to zero thereby setting
1082 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1088 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1089 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1093 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1095 beaconint_us
= ieee80211_tu_to_usec(
1096 found
->vif
.bss_conf
.beacon_int
);
1098 timeout
= local
->dynamic_ps_forced_timeout
;
1101 * Go to full PSM if the user configures a very low
1102 * latency requirement.
1103 * The 2000 second value is there for compatibility
1104 * until the PM_QOS_NETWORK_LATENCY is configured
1107 if (latency
> (1900 * USEC_PER_MSEC
) &&
1108 latency
!= (2000 * USEC_PER_SEC
))
1113 local
->dynamic_ps_user_timeout
= timeout
;
1114 if (!local
->disable_dynamic_ps
)
1115 conf
->dynamic_ps_timeout
=
1116 local
->dynamic_ps_user_timeout
;
1118 if (beaconint_us
> latency
) {
1119 local
->ps_sdata
= NULL
;
1122 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1124 /* If the TIM IE is invalid, pretend the value is 1 */
1127 else if (dtimper
> 1)
1128 maxslp
= min_t(int, dtimper
,
1129 latency
/ beaconint_us
);
1131 local
->hw
.conf
.max_sleep_period
= maxslp
;
1132 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1133 local
->ps_sdata
= found
;
1136 local
->ps_sdata
= NULL
;
1139 ieee80211_change_ps(local
);
1142 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1144 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1146 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1147 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1148 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1152 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1154 struct ieee80211_local
*local
=
1155 container_of(work
, struct ieee80211_local
,
1156 dynamic_ps_disable_work
);
1158 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1159 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1160 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1163 ieee80211_wake_queues_by_reason(&local
->hw
,
1164 IEEE80211_QUEUE_STOP_REASON_PS
);
1167 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1169 struct ieee80211_local
*local
=
1170 container_of(work
, struct ieee80211_local
,
1171 dynamic_ps_enable_work
);
1172 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1173 struct ieee80211_if_managed
*ifmgd
;
1174 unsigned long flags
;
1177 /* can only happen when PS was just disabled anyway */
1181 ifmgd
= &sdata
->u
.mgd
;
1183 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1186 if (!local
->disable_dynamic_ps
&&
1187 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1188 /* don't enter PS if TX frames are pending */
1189 if (drv_tx_frames_pending(local
)) {
1190 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1192 local
->hw
.conf
.dynamic_ps_timeout
));
1197 * transmission can be stopped by others which leads to
1198 * dynamic_ps_timer expiry. Postpone the ps timer if it
1199 * is not the actual idle state.
1201 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1202 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1203 if (local
->queue_stop_reasons
[q
]) {
1204 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1206 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1208 local
->hw
.conf
.dynamic_ps_timeout
));
1212 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1215 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1216 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1217 netif_tx_stop_all_queues(sdata
->dev
);
1219 if (drv_tx_frames_pending(local
))
1220 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1222 local
->hw
.conf
.dynamic_ps_timeout
));
1224 ieee80211_send_nullfunc(local
, sdata
, 1);
1225 /* Flush to get the tx status of nullfunc frame */
1226 drv_flush(local
, false);
1230 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1231 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1232 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1233 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1234 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1235 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1238 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1239 netif_tx_wake_all_queues(sdata
->dev
);
1242 void ieee80211_dynamic_ps_timer(unsigned long data
)
1244 struct ieee80211_local
*local
= (void *) data
;
1246 if (local
->quiescing
|| local
->suspended
)
1249 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1253 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1254 struct ieee80211_sub_if_data
*sdata
,
1255 u8
*wmm_param
, size_t wmm_param_len
)
1257 struct ieee80211_tx_queue_params params
;
1258 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1261 u8
*pos
, uapsd_queues
= 0;
1263 if (!local
->ops
->conf_tx
)
1266 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1272 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1275 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1276 uapsd_queues
= ifmgd
->uapsd_queues
;
1278 count
= wmm_param
[6] & 0x0f;
1279 if (count
== ifmgd
->wmm_last_param_set
)
1281 ifmgd
->wmm_last_param_set
= count
;
1283 pos
= wmm_param
+ 8;
1284 left
= wmm_param_len
- 8;
1286 memset(¶ms
, 0, sizeof(params
));
1289 for (; left
>= 4; left
-= 4, pos
+= 4) {
1290 int aci
= (pos
[0] >> 5) & 0x03;
1291 int acm
= (pos
[0] >> 4) & 0x01;
1299 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1300 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1306 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1307 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1313 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1314 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1321 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1322 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1327 params
.aifs
= pos
[0] & 0x0f;
1328 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1329 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1330 params
.txop
= get_unaligned_le16(pos
+ 2);
1331 params
.uapsd
= uapsd
;
1334 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1336 params
.aifs
, params
.cw_min
, params
.cw_max
,
1337 params
.txop
, params
.uapsd
);
1338 sdata
->tx_conf
[queue
] = params
;
1339 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1341 "failed to set TX queue parameters for queue %d\n",
1345 /* enable WMM or activate new settings */
1346 sdata
->vif
.bss_conf
.qos
= true;
1350 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1352 lockdep_assert_held(&sdata
->local
->mtx
);
1354 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1355 IEEE80211_STA_BEACON_POLL
);
1356 ieee80211_run_deferred_scan(sdata
->local
);
1359 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1361 mutex_lock(&sdata
->local
->mtx
);
1362 __ieee80211_stop_poll(sdata
);
1363 mutex_unlock(&sdata
->local
->mtx
);
1366 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1367 u16 capab
, bool erp_valid
, u8 erp
)
1369 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1371 bool use_protection
;
1372 bool use_short_preamble
;
1373 bool use_short_slot
;
1376 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1377 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1379 use_protection
= false;
1380 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1383 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1384 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1385 use_short_slot
= true;
1387 if (use_protection
!= bss_conf
->use_cts_prot
) {
1388 bss_conf
->use_cts_prot
= use_protection
;
1389 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1392 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1393 bss_conf
->use_short_preamble
= use_short_preamble
;
1394 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1397 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1398 bss_conf
->use_short_slot
= use_short_slot
;
1399 changed
|= BSS_CHANGED_ERP_SLOT
;
1405 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1406 struct cfg80211_bss
*cbss
,
1407 u32 bss_info_changed
)
1409 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1410 struct ieee80211_local
*local
= sdata
->local
;
1411 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1413 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1414 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1415 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1417 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1418 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1420 sdata
->u
.mgd
.associated
= cbss
;
1421 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1423 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1425 if (sdata
->vif
.p2p
) {
1426 const struct cfg80211_bss_ies
*ies
;
1429 ies
= rcu_dereference(cbss
->ies
);
1434 ret
= cfg80211_get_p2p_attr(
1435 ies
->data
, ies
->len
,
1436 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1439 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
1440 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
1441 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1442 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
1448 /* just to be sure */
1449 ieee80211_stop_poll(sdata
);
1451 ieee80211_led_assoc(local
, 1);
1453 if (sdata
->u
.mgd
.assoc_data
->have_beacon
) {
1455 * If the AP is buggy we may get here with no DTIM period
1456 * known, so assume it's 1 which is the only safe assumption
1457 * in that case, although if the TIM IE is broken powersave
1458 * probably just won't work at all.
1460 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1461 bss_info_changed
|= BSS_CHANGED_DTIM_PERIOD
;
1463 bss_conf
->dtim_period
= 0;
1466 bss_conf
->assoc
= 1;
1468 /* Tell the driver to monitor connection quality (if supported) */
1469 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1470 bss_conf
->cqm_rssi_thold
)
1471 bss_info_changed
|= BSS_CHANGED_CQM
;
1473 /* Enable ARP filtering */
1474 if (bss_conf
->arp_addr_cnt
)
1475 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1477 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1479 mutex_lock(&local
->iflist_mtx
);
1480 ieee80211_recalc_ps(local
, -1);
1481 mutex_unlock(&local
->iflist_mtx
);
1483 ieee80211_recalc_smps(sdata
);
1484 ieee80211_recalc_ps_vif(sdata
);
1486 netif_tx_start_all_queues(sdata
->dev
);
1487 netif_carrier_on(sdata
->dev
);
1490 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1491 u16 stype
, u16 reason
, bool tx
,
1494 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1495 struct ieee80211_local
*local
= sdata
->local
;
1498 ASSERT_MGD_MTX(ifmgd
);
1500 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1503 if (WARN_ON(!ifmgd
->associated
))
1506 ieee80211_stop_poll(sdata
);
1508 ifmgd
->associated
= NULL
;
1511 * we need to commit the associated = NULL change because the
1512 * scan code uses that to determine whether this iface should
1513 * go to/wake up from powersave or not -- and could otherwise
1514 * wake the queues erroneously.
1519 * Thus, we can only afterwards stop the queues -- to account
1520 * for the case where another CPU is finishing a scan at this
1521 * time -- we don't want the scan code to enable queues.
1524 netif_tx_stop_all_queues(sdata
->dev
);
1525 netif_carrier_off(sdata
->dev
);
1528 * if we want to get out of ps before disassoc (why?) we have
1529 * to do it before sending disassoc, as otherwise the null-packet
1532 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1533 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1534 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1536 local
->ps_sdata
= NULL
;
1538 /* disable per-vif ps */
1539 ieee80211_recalc_ps_vif(sdata
);
1541 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1543 drv_flush(local
, false);
1545 /* deauthenticate/disassociate now */
1546 if (tx
|| frame_buf
)
1547 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1548 reason
, tx
, frame_buf
);
1550 /* flush out frame */
1552 drv_flush(local
, false);
1554 /* clear bssid only after building the needed mgmt frames */
1555 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1557 /* remove AP and TDLS peers */
1558 sta_info_flush_defer(sdata
);
1560 /* finally reset all BSS / config parameters */
1561 changed
|= ieee80211_reset_erp_info(sdata
);
1563 ieee80211_led_assoc(local
, 0);
1564 changed
|= BSS_CHANGED_ASSOC
;
1565 sdata
->vif
.bss_conf
.assoc
= false;
1567 sdata
->vif
.bss_conf
.p2p_ctwindow
= 0;
1568 sdata
->vif
.bss_conf
.p2p_oppps
= false;
1570 /* on the next assoc, re-program HT parameters */
1571 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1572 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1574 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1576 del_timer_sync(&local
->dynamic_ps_timer
);
1577 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1579 /* Disable ARP filtering */
1580 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1581 changed
|= BSS_CHANGED_ARP_FILTER
;
1583 sdata
->vif
.bss_conf
.qos
= false;
1584 changed
|= BSS_CHANGED_QOS
;
1586 /* The BSSID (not really interesting) and HT changed */
1587 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1588 ieee80211_bss_info_change_notify(sdata
, changed
);
1590 /* disassociated - set to defaults now */
1591 ieee80211_set_wmm_default(sdata
, false);
1593 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1594 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1595 del_timer_sync(&sdata
->u
.mgd
.timer
);
1596 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1598 sdata
->u
.mgd
.timers_running
= 0;
1600 sdata
->vif
.bss_conf
.dtim_period
= 0;
1603 ieee80211_vif_release_channel(sdata
);
1606 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1607 struct ieee80211_hdr
*hdr
)
1610 * We can postpone the mgd.timer whenever receiving unicast frames
1611 * from AP because we know that the connection is working both ways
1612 * at that time. But multicast frames (and hence also beacons) must
1613 * be ignored here, because we need to trigger the timer during
1614 * data idle periods for sending the periodic probe request to the
1615 * AP we're connected to.
1617 if (is_multicast_ether_addr(hdr
->addr1
))
1620 ieee80211_sta_reset_conn_monitor(sdata
);
1623 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1625 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1626 struct ieee80211_local
*local
= sdata
->local
;
1628 mutex_lock(&local
->mtx
);
1629 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1630 IEEE80211_STA_CONNECTION_POLL
))) {
1631 mutex_unlock(&local
->mtx
);
1635 __ieee80211_stop_poll(sdata
);
1637 mutex_lock(&local
->iflist_mtx
);
1638 ieee80211_recalc_ps(local
, -1);
1639 mutex_unlock(&local
->iflist_mtx
);
1641 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1645 * We've received a probe response, but are not sure whether
1646 * we have or will be receiving any beacons or data, so let's
1647 * schedule the timers again, just in case.
1649 ieee80211_sta_reset_beacon_monitor(sdata
);
1651 mod_timer(&ifmgd
->conn_mon_timer
,
1652 round_jiffies_up(jiffies
+
1653 IEEE80211_CONNECTION_IDLE_TIME
));
1655 mutex_unlock(&local
->mtx
);
1658 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1659 struct ieee80211_hdr
*hdr
, bool ack
)
1661 if (!ieee80211_is_data(hdr
->frame_control
))
1665 ieee80211_sta_reset_conn_monitor(sdata
);
1667 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1668 sdata
->u
.mgd
.probe_send_count
> 0) {
1670 sdata
->u
.mgd
.probe_send_count
= 0;
1672 sdata
->u
.mgd
.nullfunc_failed
= true;
1673 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1677 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1679 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1681 u8
*dst
= ifmgd
->associated
->bssid
;
1682 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1685 * Try sending broadcast probe requests for the last three
1686 * probe requests after the first ones failed since some
1687 * buggy APs only support broadcast probe requests.
1689 if (ifmgd
->probe_send_count
>= unicast_limit
)
1693 * When the hardware reports an accurate Tx ACK status, it's
1694 * better to send a nullfunc frame instead of a probe request,
1695 * as it will kick us off the AP quickly if we aren't associated
1696 * anymore. The timeout will be reset if the frame is ACKed by
1699 ifmgd
->probe_send_count
++;
1701 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1702 ifmgd
->nullfunc_failed
= false;
1703 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1708 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1709 if (WARN_ON_ONCE(ssid
== NULL
))
1714 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1715 0, (u32
) -1, true, 0,
1716 ifmgd
->associated
->channel
, false);
1720 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1721 run_again(ifmgd
, ifmgd
->probe_timeout
);
1722 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1723 drv_flush(sdata
->local
, false);
1726 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1729 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1730 bool already
= false;
1732 if (!ieee80211_sdata_running(sdata
))
1735 mutex_lock(&ifmgd
->mtx
);
1737 if (!ifmgd
->associated
)
1740 mutex_lock(&sdata
->local
->mtx
);
1742 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1743 mutex_unlock(&sdata
->local
->mtx
);
1748 mlme_dbg_ratelimited(sdata
,
1749 "detected beacon loss from AP - sending probe request\n");
1751 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1752 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1755 * The driver/our work has already reported this event or the
1756 * connection monitoring has kicked in and we have already sent
1757 * a probe request. Or maybe the AP died and the driver keeps
1758 * reporting until we disassociate...
1760 * In either case we have to ignore the current call to this
1761 * function (except for setting the correct probe reason bit)
1762 * because otherwise we would reset the timer every time and
1763 * never check whether we received a probe response!
1765 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1766 IEEE80211_STA_CONNECTION_POLL
))
1770 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1772 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1774 mutex_unlock(&sdata
->local
->mtx
);
1779 mutex_lock(&sdata
->local
->iflist_mtx
);
1780 ieee80211_recalc_ps(sdata
->local
, -1);
1781 mutex_unlock(&sdata
->local
->iflist_mtx
);
1783 ifmgd
->probe_send_count
= 0;
1784 ieee80211_mgd_probe_ap_send(sdata
);
1786 mutex_unlock(&ifmgd
->mtx
);
1789 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1790 struct ieee80211_vif
*vif
)
1792 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1793 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1794 struct cfg80211_bss
*cbss
;
1795 struct sk_buff
*skb
;
1799 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1802 ASSERT_MGD_MTX(ifmgd
);
1804 if (ifmgd
->associated
)
1805 cbss
= ifmgd
->associated
;
1806 else if (ifmgd
->auth_data
)
1807 cbss
= ifmgd
->auth_data
->bss
;
1808 else if (ifmgd
->assoc_data
)
1809 cbss
= ifmgd
->assoc_data
->bss
;
1814 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1815 if (WARN_ON_ONCE(ssid
== NULL
))
1820 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1821 (u32
) -1, cbss
->channel
,
1828 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1830 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
,
1831 bool transmit_frame
)
1833 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1834 struct ieee80211_local
*local
= sdata
->local
;
1835 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1837 mutex_lock(&ifmgd
->mtx
);
1838 if (!ifmgd
->associated
) {
1839 mutex_unlock(&ifmgd
->mtx
);
1843 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1844 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1845 transmit_frame
, frame_buf
);
1846 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1847 mutex_unlock(&ifmgd
->mtx
);
1850 * must be outside lock due to cfg80211,
1851 * but that's not a problem.
1853 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1855 mutex_lock(&local
->mtx
);
1856 ieee80211_recalc_idle(local
);
1857 mutex_unlock(&local
->mtx
);
1860 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1862 struct ieee80211_sub_if_data
*sdata
=
1863 container_of(work
, struct ieee80211_sub_if_data
,
1864 u
.mgd
.beacon_connection_loss_work
);
1865 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1866 struct sta_info
*sta
;
1868 if (ifmgd
->associated
) {
1870 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1872 sta
->beacon_loss_count
++;
1876 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
) {
1877 sdata_info(sdata
, "Connection to AP %pM lost\n",
1879 __ieee80211_disconnect(sdata
, false);
1881 ieee80211_mgd_probe_ap(sdata
, true);
1885 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1887 struct ieee80211_sub_if_data
*sdata
=
1888 container_of(work
, struct ieee80211_sub_if_data
,
1889 u
.mgd
.csa_connection_drop_work
);
1891 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1892 IEEE80211_QUEUE_STOP_REASON_CSA
);
1893 __ieee80211_disconnect(sdata
, true);
1896 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1898 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1899 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1901 trace_api_beacon_loss(sdata
);
1903 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1904 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1906 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1908 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1910 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1911 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1913 trace_api_connection_loss(sdata
);
1915 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1916 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1918 EXPORT_SYMBOL(ieee80211_connection_loss
);
1921 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1924 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1926 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1929 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1931 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1932 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1933 sdata
->u
.mgd
.flags
= 0;
1934 ieee80211_vif_release_channel(sdata
);
1937 cfg80211_put_bss(auth_data
->bss
);
1939 sdata
->u
.mgd
.auth_data
= NULL
;
1942 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1943 struct ieee80211_mgmt
*mgmt
, size_t len
)
1945 struct ieee80211_local
*local
= sdata
->local
;
1946 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1948 struct ieee802_11_elems elems
;
1951 pos
= mgmt
->u
.auth
.variable
;
1952 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1953 if (!elems
.challenge
)
1955 auth_data
->expected_transaction
= 4;
1956 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1957 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1958 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1959 IEEE80211_TX_INTFL_MLME_CONN_TX
;
1960 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
1961 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1962 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1963 auth_data
->key
, auth_data
->key_len
,
1964 auth_data
->key_idx
, tx_flags
);
1967 static enum rx_mgmt_action __must_check
1968 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1969 struct ieee80211_mgmt
*mgmt
, size_t len
)
1971 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1973 u16 auth_alg
, auth_transaction
, status_code
;
1974 struct sta_info
*sta
;
1976 lockdep_assert_held(&ifmgd
->mtx
);
1979 return RX_MGMT_NONE
;
1981 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1982 return RX_MGMT_NONE
;
1984 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1986 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1987 return RX_MGMT_NONE
;
1989 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1990 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1991 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1993 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1994 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
1995 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1996 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
1998 ifmgd
->auth_data
->expected_transaction
);
1999 return RX_MGMT_NONE
;
2002 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2003 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2004 mgmt
->sa
, status_code
);
2005 ieee80211_destroy_auth_data(sdata
, false);
2006 return RX_MGMT_CFG80211_RX_AUTH
;
2009 switch (ifmgd
->auth_data
->algorithm
) {
2010 case WLAN_AUTH_OPEN
:
2011 case WLAN_AUTH_LEAP
:
2015 case WLAN_AUTH_SHARED_KEY
:
2016 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2017 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2018 /* need another frame */
2019 return RX_MGMT_NONE
;
2023 WARN_ONCE(1, "invalid auth alg %d",
2024 ifmgd
->auth_data
->algorithm
);
2025 return RX_MGMT_NONE
;
2028 sdata_info(sdata
, "authenticated\n");
2029 ifmgd
->auth_data
->done
= true;
2030 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2031 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2033 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2034 ifmgd
->auth_data
->expected_transaction
!= 2) {
2036 * Report auth frame to user space for processing since another
2037 * round of Authentication frames is still needed.
2039 return RX_MGMT_CFG80211_RX_AUTH
;
2042 /* move station state to auth */
2043 mutex_lock(&sdata
->local
->sta_mtx
);
2044 sta
= sta_info_get(sdata
, bssid
);
2046 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2049 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2050 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2053 mutex_unlock(&sdata
->local
->sta_mtx
);
2055 return RX_MGMT_CFG80211_RX_AUTH
;
2057 mutex_unlock(&sdata
->local
->sta_mtx
);
2058 /* ignore frame -- wait for timeout */
2059 return RX_MGMT_NONE
;
2063 static enum rx_mgmt_action __must_check
2064 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2065 struct ieee80211_mgmt
*mgmt
, size_t len
)
2067 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2068 const u8
*bssid
= NULL
;
2071 lockdep_assert_held(&ifmgd
->mtx
);
2074 return RX_MGMT_NONE
;
2076 if (!ifmgd
->associated
||
2077 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2078 return RX_MGMT_NONE
;
2080 bssid
= ifmgd
->associated
->bssid
;
2082 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2084 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2085 bssid
, reason_code
);
2087 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2089 mutex_lock(&sdata
->local
->mtx
);
2090 ieee80211_recalc_idle(sdata
->local
);
2091 mutex_unlock(&sdata
->local
->mtx
);
2093 return RX_MGMT_CFG80211_DEAUTH
;
2097 static enum rx_mgmt_action __must_check
2098 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2099 struct ieee80211_mgmt
*mgmt
, size_t len
)
2101 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2104 lockdep_assert_held(&ifmgd
->mtx
);
2107 return RX_MGMT_NONE
;
2109 if (!ifmgd
->associated
||
2110 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2111 return RX_MGMT_NONE
;
2113 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2115 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2116 mgmt
->sa
, reason_code
);
2118 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2120 mutex_lock(&sdata
->local
->mtx
);
2121 ieee80211_recalc_idle(sdata
->local
);
2122 mutex_unlock(&sdata
->local
->mtx
);
2124 return RX_MGMT_CFG80211_DISASSOC
;
2127 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2128 u8
*supp_rates
, unsigned int supp_rates_len
,
2129 u32
*rates
, u32
*basic_rates
,
2130 bool *have_higher_than_11mbit
,
2131 int *min_rate
, int *min_rate_index
)
2135 for (i
= 0; i
< supp_rates_len
; i
++) {
2136 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2137 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2140 *have_higher_than_11mbit
= true;
2143 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2144 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2146 * Note: Even through the membership selector and the basic
2147 * rate flag share the same bit, they are not exactly
2150 if (!!(supp_rates
[i
] & 0x80) &&
2151 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2154 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2155 if (sband
->bitrates
[j
].bitrate
== rate
) {
2158 *basic_rates
|= BIT(j
);
2159 if (rate
< *min_rate
) {
2161 *min_rate_index
= j
;
2169 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2172 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2174 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2177 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2179 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2180 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2181 sdata
->u
.mgd
.flags
= 0;
2182 ieee80211_vif_release_channel(sdata
);
2186 sdata
->u
.mgd
.assoc_data
= NULL
;
2189 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2190 struct cfg80211_bss
*cbss
,
2191 struct ieee80211_mgmt
*mgmt
, size_t len
)
2193 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2194 struct ieee80211_local
*local
= sdata
->local
;
2195 struct ieee80211_supported_band
*sband
;
2196 struct sta_info
*sta
;
2198 u16 capab_info
, aid
;
2199 struct ieee802_11_elems elems
;
2200 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2204 /* AssocResp and ReassocResp have identical structure */
2206 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2207 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2209 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2210 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2212 aid
&= ~(BIT(15) | BIT(14));
2214 ifmgd
->broken_ap
= false;
2216 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2217 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2220 ifmgd
->broken_ap
= true;
2223 pos
= mgmt
->u
.assoc_resp
.variable
;
2224 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2226 if (!elems
.supp_rates
) {
2227 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2233 mutex_lock(&sdata
->local
->sta_mtx
);
2235 * station info was already allocated and inserted before
2236 * the association and should be available to us
2238 sta
= sta_info_get(sdata
, cbss
->bssid
);
2239 if (WARN_ON(!sta
)) {
2240 mutex_unlock(&sdata
->local
->sta_mtx
);
2244 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2246 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2247 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2248 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2250 sta
->supports_40mhz
=
2251 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2253 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2254 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2258 rate_control_rate_init(sta
);
2260 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2261 set_sta_flag(sta
, WLAN_STA_MFP
);
2263 if (elems
.wmm_param
)
2264 set_sta_flag(sta
, WLAN_STA_WME
);
2266 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2268 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2269 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2270 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2273 "failed to move station %pM to desired state\n",
2275 WARN_ON(__sta_info_destroy(sta
));
2276 mutex_unlock(&sdata
->local
->sta_mtx
);
2280 mutex_unlock(&sdata
->local
->sta_mtx
);
2283 * Always handle WMM once after association regardless
2284 * of the first value the AP uses. Setting -1 here has
2285 * that effect because the AP values is an unsigned
2288 ifmgd
->wmm_last_param_set
= -1;
2290 if (elems
.wmm_param
)
2291 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2292 elems
.wmm_param_len
);
2294 ieee80211_set_wmm_default(sdata
, false);
2295 changed
|= BSS_CHANGED_QOS
;
2297 if (elems
.ht_operation
&& elems
.wmm_param
&&
2298 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2299 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2300 cbss
->bssid
, false);
2302 /* set AID and assoc capability,
2303 * ieee80211_set_associated() will tell the driver */
2304 bss_conf
->aid
= aid
;
2305 bss_conf
->assoc_capability
= capab_info
;
2306 ieee80211_set_associated(sdata
, cbss
, changed
);
2309 * If we're using 4-addr mode, let the AP know that we're
2310 * doing so, so that it can create the STA VLAN on its side
2312 if (ifmgd
->use_4addr
)
2313 ieee80211_send_4addr_nullfunc(local
, sdata
);
2316 * Start timer to probe the connection to the AP now.
2317 * Also start the timer that will detect beacon loss.
2319 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2320 ieee80211_sta_reset_beacon_monitor(sdata
);
2325 static enum rx_mgmt_action __must_check
2326 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2327 struct ieee80211_mgmt
*mgmt
, size_t len
,
2328 struct cfg80211_bss
**bss
)
2330 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2331 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2332 u16 capab_info
, status_code
, aid
;
2333 struct ieee802_11_elems elems
;
2337 lockdep_assert_held(&ifmgd
->mtx
);
2340 return RX_MGMT_NONE
;
2341 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2342 return RX_MGMT_NONE
;
2345 * AssocResp and ReassocResp have identical structure, so process both
2346 * of them in this function.
2350 return RX_MGMT_NONE
;
2352 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2353 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2354 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2355 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2358 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2359 reassoc
? "Rea" : "A", mgmt
->sa
,
2360 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2362 pos
= mgmt
->u
.assoc_resp
.variable
;
2363 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2365 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2366 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2367 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2369 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2370 ms
= tu
* 1024 / 1000;
2372 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2374 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2375 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2376 run_again(ifmgd
, assoc_data
->timeout
);
2377 return RX_MGMT_NONE
;
2380 *bss
= assoc_data
->bss
;
2382 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2383 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2384 mgmt
->sa
, status_code
);
2385 ieee80211_destroy_assoc_data(sdata
, false);
2387 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2388 /* oops -- internal error -- send timeout for now */
2389 ieee80211_destroy_assoc_data(sdata
, false);
2390 cfg80211_put_bss(*bss
);
2391 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2393 sdata_info(sdata
, "associated\n");
2396 * destroy assoc_data afterwards, as otherwise an idle
2397 * recalc after assoc_data is NULL but before associated
2398 * is set can cause the interface to go idle
2400 ieee80211_destroy_assoc_data(sdata
, true);
2403 return RX_MGMT_CFG80211_RX_ASSOC
;
2406 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2407 struct ieee80211_mgmt
*mgmt
, size_t len
,
2408 struct ieee80211_rx_status
*rx_status
,
2409 struct ieee802_11_elems
*elems
)
2411 struct ieee80211_local
*local
= sdata
->local
;
2413 struct ieee80211_bss
*bss
;
2414 struct ieee80211_channel
*channel
;
2415 bool need_ps
= false;
2417 if ((sdata
->u
.mgd
.associated
&&
2418 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2419 (sdata
->u
.mgd
.assoc_data
&&
2420 ether_addr_equal(mgmt
->bssid
,
2421 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2422 /* not previously set so we may need to recalc */
2423 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2425 if (elems
->tim
&& !elems
->parse_error
) {
2426 struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2427 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2431 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2432 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2435 freq
= rx_status
->freq
;
2437 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2439 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2442 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2445 ieee80211_rx_bss_put(local
, bss
);
2447 if (!sdata
->u
.mgd
.associated
)
2451 mutex_lock(&local
->iflist_mtx
);
2452 ieee80211_recalc_ps(local
, -1);
2453 mutex_unlock(&local
->iflist_mtx
);
2456 if (elems
->ch_switch_ie
&&
2457 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2458 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2459 bss
, rx_status
->mactime
);
2463 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2464 struct sk_buff
*skb
)
2466 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2467 struct ieee80211_if_managed
*ifmgd
;
2468 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2469 size_t baselen
, len
= skb
->len
;
2470 struct ieee802_11_elems elems
;
2472 ifmgd
= &sdata
->u
.mgd
;
2474 ASSERT_MGD_MTX(ifmgd
);
2476 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2477 return; /* ignore ProbeResp to foreign address */
2479 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2483 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2486 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2488 if (ifmgd
->associated
&&
2489 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2490 ieee80211_reset_ap_probe(sdata
);
2492 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2493 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2494 /* got probe response, continue with auth */
2495 sdata_info(sdata
, "direct probe responded\n");
2496 ifmgd
->auth_data
->tries
= 0;
2497 ifmgd
->auth_data
->timeout
= jiffies
;
2498 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2503 * This is the canonical list of information elements we care about,
2504 * the filter code also gives us all changes to the Microsoft OUI
2505 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2507 * We implement beacon filtering in software since that means we can
2508 * avoid processing the frame here and in cfg80211, and userspace
2509 * will not be able to tell whether the hardware supports it or not.
2511 * XXX: This list needs to be dynamic -- userspace needs to be able to
2512 * add items it requires. It also needs to be able to tell us to
2513 * look out for other vendor IEs.
2515 static const u64 care_about_ies
=
2516 (1ULL << WLAN_EID_COUNTRY
) |
2517 (1ULL << WLAN_EID_ERP_INFO
) |
2518 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2519 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2520 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2521 (1ULL << WLAN_EID_HT_OPERATION
);
2523 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2524 struct ieee80211_mgmt
*mgmt
,
2526 struct ieee80211_rx_status
*rx_status
)
2528 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2529 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2531 struct ieee802_11_elems elems
;
2532 struct ieee80211_local
*local
= sdata
->local
;
2533 struct ieee80211_chanctx_conf
*chanctx_conf
;
2534 struct ieee80211_channel
*chan
;
2541 lockdep_assert_held(&ifmgd
->mtx
);
2543 /* Process beacon from the current BSS */
2544 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2549 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2550 if (!chanctx_conf
) {
2555 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2559 chan
= chanctx_conf
->def
.chan
;
2562 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2563 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2564 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2565 len
- baselen
, &elems
);
2567 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2568 ifmgd
->assoc_data
->have_beacon
= true;
2569 ifmgd
->assoc_data
->need_beacon
= false;
2570 /* continue assoc process */
2571 ifmgd
->assoc_data
->timeout
= jiffies
;
2572 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2576 if (!ifmgd
->associated
||
2577 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2579 bssid
= ifmgd
->associated
->bssid
;
2581 /* Track average RSSI from the Beacon frames of the current AP */
2582 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2583 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2584 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2585 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2586 ifmgd
->last_cqm_event_signal
= 0;
2587 ifmgd
->count_beacon_signal
= 1;
2588 ifmgd
->last_ave_beacon_signal
= 0;
2590 ifmgd
->ave_beacon_signal
=
2591 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2592 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2593 ifmgd
->ave_beacon_signal
) / 16;
2594 ifmgd
->count_beacon_signal
++;
2597 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2598 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2599 int sig
= ifmgd
->ave_beacon_signal
;
2600 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2603 * if signal crosses either of the boundaries, invoke callback
2604 * with appropriate parameters
2606 if (sig
> ifmgd
->rssi_max_thold
&&
2607 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2608 ifmgd
->last_ave_beacon_signal
= sig
;
2609 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2610 } else if (sig
< ifmgd
->rssi_min_thold
&&
2611 (last_sig
>= ifmgd
->rssi_max_thold
||
2613 ifmgd
->last_ave_beacon_signal
= sig
;
2614 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2618 if (bss_conf
->cqm_rssi_thold
&&
2619 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2620 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2621 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2622 int last_event
= ifmgd
->last_cqm_event_signal
;
2623 int thold
= bss_conf
->cqm_rssi_thold
;
2624 int hyst
= bss_conf
->cqm_rssi_hyst
;
2626 (last_event
== 0 || sig
< last_event
- hyst
)) {
2627 ifmgd
->last_cqm_event_signal
= sig
;
2628 ieee80211_cqm_rssi_notify(
2630 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2632 } else if (sig
> thold
&&
2633 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2634 ifmgd
->last_cqm_event_signal
= sig
;
2635 ieee80211_cqm_rssi_notify(
2637 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2642 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2643 mlme_dbg_ratelimited(sdata
,
2644 "cancelling probereq poll due to a received beacon\n");
2645 mutex_lock(&local
->mtx
);
2646 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2647 ieee80211_run_deferred_scan(local
);
2648 mutex_unlock(&local
->mtx
);
2650 mutex_lock(&local
->iflist_mtx
);
2651 ieee80211_recalc_ps(local
, -1);
2652 mutex_unlock(&local
->iflist_mtx
);
2656 * Push the beacon loss detection into the future since
2657 * we are processing a beacon from the AP just now.
2659 ieee80211_sta_reset_beacon_monitor(sdata
);
2661 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2662 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2663 len
- baselen
, &elems
,
2664 care_about_ies
, ncrc
);
2666 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2667 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2671 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2672 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2673 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2674 ieee80211_hw_config(local
,
2675 IEEE80211_CONF_CHANGE_PS
);
2677 ieee80211_send_nullfunc(local
, sdata
, 0);
2678 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2679 local
->pspolling
= true;
2682 * Here is assumed that the driver will be
2683 * able to send ps-poll frame and receive a
2684 * response even though power save mode is
2685 * enabled, but some drivers might require
2686 * to disable power save here. This needs
2687 * to be investigated.
2689 ieee80211_send_pspoll(local
, sdata
);
2694 if (sdata
->vif
.p2p
) {
2698 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2700 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2702 if (ret
>= 2 && sdata
->u
.mgd
.p2p_noa_index
!= noa
[0]) {
2703 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
2704 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
2705 changed
|= BSS_CHANGED_P2P_PS
;
2706 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
2708 * make sure we update all information, the CRC
2709 * mechanism doesn't look at P2P attributes.
2711 ifmgd
->beacon_crc_valid
= false;
2715 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2717 ifmgd
->beacon_crc
= ncrc
;
2718 ifmgd
->beacon_crc_valid
= true;
2720 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2722 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2723 elems
.wmm_param_len
))
2724 changed
|= BSS_CHANGED_QOS
;
2727 * If we haven't had a beacon before, tell the driver about the
2730 if (!bss_conf
->dtim_period
) {
2731 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2733 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
2735 bss_conf
->dtim_period
= 1;
2736 changed
|= BSS_CHANGED_DTIM_PERIOD
;
2739 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2741 erp_value
= elems
.erp_info
[0];
2745 changed
|= ieee80211_handle_bss_capability(sdata
,
2746 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2747 erp_valid
, erp_value
);
2750 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2751 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2752 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2755 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2756 mgmt
->u
.probe_resp
.capab_info
&
2757 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2758 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
2760 elems
.country_elem_len
,
2761 elems
.pwr_constr_elem
);
2763 ieee80211_bss_info_change_notify(sdata
, changed
);
2766 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2767 struct sk_buff
*skb
)
2769 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2770 struct ieee80211_rx_status
*rx_status
;
2771 struct ieee80211_mgmt
*mgmt
;
2772 struct cfg80211_bss
*bss
= NULL
;
2773 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2776 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2777 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2778 fc
= le16_to_cpu(mgmt
->frame_control
);
2780 mutex_lock(&ifmgd
->mtx
);
2782 switch (fc
& IEEE80211_FCTL_STYPE
) {
2783 case IEEE80211_STYPE_BEACON
:
2784 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2786 case IEEE80211_STYPE_PROBE_RESP
:
2787 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2789 case IEEE80211_STYPE_AUTH
:
2790 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2792 case IEEE80211_STYPE_DEAUTH
:
2793 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2795 case IEEE80211_STYPE_DISASSOC
:
2796 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2798 case IEEE80211_STYPE_ASSOC_RESP
:
2799 case IEEE80211_STYPE_REASSOC_RESP
:
2800 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2802 case IEEE80211_STYPE_ACTION
:
2803 switch (mgmt
->u
.action
.category
) {
2804 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2805 ieee80211_sta_process_chanswitch(sdata
,
2806 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2807 (void *)ifmgd
->associated
->priv
,
2808 rx_status
->mactime
);
2812 mutex_unlock(&ifmgd
->mtx
);
2818 case RX_MGMT_CFG80211_DEAUTH
:
2819 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2821 case RX_MGMT_CFG80211_DISASSOC
:
2822 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2824 case RX_MGMT_CFG80211_RX_AUTH
:
2825 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2827 case RX_MGMT_CFG80211_RX_ASSOC
:
2828 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2830 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2831 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2834 WARN(1, "unexpected: %d", rma
);
2838 static void ieee80211_sta_timer(unsigned long data
)
2840 struct ieee80211_sub_if_data
*sdata
=
2841 (struct ieee80211_sub_if_data
*) data
;
2842 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2843 struct ieee80211_local
*local
= sdata
->local
;
2845 if (local
->quiescing
) {
2846 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2850 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2853 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2854 u8
*bssid
, u8 reason
)
2856 struct ieee80211_local
*local
= sdata
->local
;
2857 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2858 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2860 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2862 mutex_unlock(&ifmgd
->mtx
);
2865 * must be outside lock due to cfg80211,
2866 * but that's not a problem.
2868 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2870 mutex_lock(&local
->mtx
);
2871 ieee80211_recalc_idle(local
);
2872 mutex_unlock(&local
->mtx
);
2874 mutex_lock(&ifmgd
->mtx
);
2877 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2879 struct ieee80211_local
*local
= sdata
->local
;
2880 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2881 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2884 lockdep_assert_held(&ifmgd
->mtx
);
2886 if (WARN_ON_ONCE(!auth_data
))
2889 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2890 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2891 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2895 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2896 sdata_info(sdata
, "authentication with %pM timed out\n",
2897 auth_data
->bss
->bssid
);
2900 * Most likely AP is not in the range so remove the
2901 * bss struct for that AP.
2903 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2908 drv_mgd_prepare_tx(local
, sdata
);
2910 if (auth_data
->bss
->proberesp_ies
) {
2914 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2915 auth_data
->bss
->bssid
, auth_data
->tries
,
2916 IEEE80211_AUTH_MAX_TRIES
);
2918 auth_data
->expected_transaction
= 2;
2920 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
2921 trans
= auth_data
->sae_trans
;
2922 status
= auth_data
->sae_status
;
2923 auth_data
->expected_transaction
= trans
;
2926 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
2927 auth_data
->data
, auth_data
->data_len
,
2928 auth_data
->bss
->bssid
,
2929 auth_data
->bss
->bssid
, NULL
, 0, 0,
2934 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2935 auth_data
->bss
->bssid
, auth_data
->tries
,
2936 IEEE80211_AUTH_MAX_TRIES
);
2939 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2945 * Direct probe is sent to broadcast address as some APs
2946 * will not answer to direct packet in unassociated state.
2948 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2949 NULL
, 0, (u32
) -1, true, tx_flags
,
2950 auth_data
->bss
->channel
, false);
2954 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
2955 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2956 run_again(ifmgd
, auth_data
->timeout
);
2962 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2964 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2965 struct ieee80211_local
*local
= sdata
->local
;
2967 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2969 assoc_data
->tries
++;
2970 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2971 sdata_info(sdata
, "association with %pM timed out\n",
2972 assoc_data
->bss
->bssid
);
2975 * Most likely AP is not in the range so remove the
2976 * bss struct for that AP.
2978 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2983 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2984 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2985 IEEE80211_ASSOC_MAX_TRIES
);
2986 ieee80211_send_assoc(sdata
);
2988 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
2989 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2990 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2996 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
2997 __le16 fc
, bool acked
)
2999 struct ieee80211_local
*local
= sdata
->local
;
3001 sdata
->u
.mgd
.status_fc
= fc
;
3002 sdata
->u
.mgd
.status_acked
= acked
;
3003 sdata
->u
.mgd
.status_received
= true;
3005 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3008 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3010 struct ieee80211_local
*local
= sdata
->local
;
3011 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3013 mutex_lock(&ifmgd
->mtx
);
3015 if (ifmgd
->status_received
) {
3016 __le16 fc
= ifmgd
->status_fc
;
3017 bool status_acked
= ifmgd
->status_acked
;
3019 ifmgd
->status_received
= false;
3020 if (ifmgd
->auth_data
&&
3021 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3023 ifmgd
->auth_data
->timeout
=
3024 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3025 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3027 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3029 } else if (ifmgd
->assoc_data
&&
3030 (ieee80211_is_assoc_req(fc
) ||
3031 ieee80211_is_reassoc_req(fc
))) {
3033 ifmgd
->assoc_data
->timeout
=
3034 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3035 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3037 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3042 if (ifmgd
->auth_data
&&
3043 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3044 if (ifmgd
->auth_data
->done
) {
3046 * ok ... we waited for assoc but userspace didn't,
3047 * so let's just kill the auth data
3049 ieee80211_destroy_auth_data(sdata
, false);
3050 } else if (ieee80211_probe_auth(sdata
)) {
3053 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3055 ieee80211_destroy_auth_data(sdata
, false);
3057 mutex_unlock(&ifmgd
->mtx
);
3058 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
3059 mutex_lock(&ifmgd
->mtx
);
3061 } else if (ifmgd
->auth_data
)
3062 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3064 if (ifmgd
->assoc_data
&&
3065 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3066 if ((ifmgd
->assoc_data
->need_beacon
&&
3067 !ifmgd
->assoc_data
->have_beacon
) ||
3068 ieee80211_do_assoc(sdata
)) {
3071 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3073 ieee80211_destroy_assoc_data(sdata
, false);
3075 mutex_unlock(&ifmgd
->mtx
);
3076 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3077 mutex_lock(&ifmgd
->mtx
);
3079 } else if (ifmgd
->assoc_data
)
3080 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3082 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3083 IEEE80211_STA_CONNECTION_POLL
) &&
3084 ifmgd
->associated
) {
3088 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3090 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3091 max_tries
= max_nullfunc_tries
;
3093 max_tries
= max_probe_tries
;
3095 /* ACK received for nullfunc probing frame */
3096 if (!ifmgd
->probe_send_count
)
3097 ieee80211_reset_ap_probe(sdata
);
3098 else if (ifmgd
->nullfunc_failed
) {
3099 if (ifmgd
->probe_send_count
< max_tries
) {
3101 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3102 bssid
, ifmgd
->probe_send_count
,
3104 ieee80211_mgd_probe_ap_send(sdata
);
3107 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3109 ieee80211_sta_connection_lost(sdata
, bssid
,
3110 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3112 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3113 run_again(ifmgd
, ifmgd
->probe_timeout
);
3114 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3116 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3117 bssid
, probe_wait_ms
);
3118 ieee80211_sta_connection_lost(sdata
, bssid
,
3119 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3120 } else if (ifmgd
->probe_send_count
< max_tries
) {
3122 "No probe response from AP %pM after %dms, try %d/%i\n",
3123 bssid
, probe_wait_ms
,
3124 ifmgd
->probe_send_count
, max_tries
);
3125 ieee80211_mgd_probe_ap_send(sdata
);
3128 * We actually lost the connection ... or did we?
3131 wiphy_debug(local
->hw
.wiphy
,
3132 "%s: No probe response from AP %pM"
3133 " after %dms, disconnecting.\n",
3135 bssid
, probe_wait_ms
);
3137 ieee80211_sta_connection_lost(sdata
, bssid
,
3138 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
3142 mutex_unlock(&ifmgd
->mtx
);
3144 mutex_lock(&local
->mtx
);
3145 ieee80211_recalc_idle(local
);
3146 mutex_unlock(&local
->mtx
);
3149 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3151 struct ieee80211_sub_if_data
*sdata
=
3152 (struct ieee80211_sub_if_data
*) data
;
3153 struct ieee80211_local
*local
= sdata
->local
;
3155 if (local
->quiescing
)
3158 ieee80211_queue_work(&sdata
->local
->hw
,
3159 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3162 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3164 struct ieee80211_sub_if_data
*sdata
=
3165 (struct ieee80211_sub_if_data
*) data
;
3166 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3167 struct ieee80211_local
*local
= sdata
->local
;
3169 if (local
->quiescing
)
3172 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3175 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3177 struct ieee80211_sub_if_data
*sdata
=
3178 container_of(work
, struct ieee80211_sub_if_data
,
3179 u
.mgd
.monitor_work
);
3181 ieee80211_mgd_probe_ap(sdata
, false);
3184 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3188 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3189 __ieee80211_stop_poll(sdata
);
3191 /* let's probe the connection once */
3192 flags
= sdata
->local
->hw
.flags
;
3193 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3194 ieee80211_queue_work(&sdata
->local
->hw
,
3195 &sdata
->u
.mgd
.monitor_work
);
3196 /* and do all the other regular work too */
3197 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3202 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
3204 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3207 * we need to use atomic bitops for the running bits
3208 * only because both timers might fire at the same
3209 * time -- the code here is properly synchronised.
3212 cancel_work_sync(&ifmgd
->request_smps_work
);
3214 cancel_work_sync(&ifmgd
->monitor_work
);
3215 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3216 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3217 if (del_timer_sync(&ifmgd
->timer
))
3218 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3220 cancel_work_sync(&ifmgd
->chswitch_work
);
3221 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3222 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3224 /* these will just be re-established on connection */
3225 del_timer_sync(&ifmgd
->conn_mon_timer
);
3226 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3229 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3231 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3233 mutex_lock(&ifmgd
->mtx
);
3234 if (!ifmgd
->associated
) {
3235 mutex_unlock(&ifmgd
->mtx
);
3239 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3240 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3241 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3242 ieee80211_sta_connection_lost(sdata
,
3243 ifmgd
->associated
->bssid
,
3244 WLAN_REASON_UNSPECIFIED
);
3245 mutex_unlock(&ifmgd
->mtx
);
3248 mutex_unlock(&ifmgd
->mtx
);
3250 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3251 add_timer(&ifmgd
->timer
);
3252 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3253 add_timer(&ifmgd
->chswitch_timer
);
3254 ieee80211_sta_reset_beacon_monitor(sdata
);
3256 mutex_lock(&sdata
->local
->mtx
);
3257 ieee80211_restart_sta_timer(sdata
);
3258 mutex_unlock(&sdata
->local
->mtx
);
3262 /* interface setup */
3263 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3265 struct ieee80211_if_managed
*ifmgd
;
3267 ifmgd
= &sdata
->u
.mgd
;
3268 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3269 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3270 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3271 ieee80211_beacon_connection_loss_work
);
3272 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3273 ieee80211_csa_connection_drop_work
);
3274 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3275 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3276 (unsigned long) sdata
);
3277 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3278 (unsigned long) sdata
);
3279 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3280 (unsigned long) sdata
);
3281 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3282 (unsigned long) sdata
);
3285 ifmgd
->powersave
= sdata
->wdev
.ps
;
3286 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3287 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3289 mutex_init(&ifmgd
->mtx
);
3291 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3292 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3294 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3297 /* scan finished notification */
3298 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3300 struct ieee80211_sub_if_data
*sdata
;
3302 /* Restart STA timers */
3304 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3305 ieee80211_restart_sta_timer(sdata
);
3309 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3310 unsigned long data
, void *dummy
)
3312 s32 latency_usec
= (s32
) data
;
3313 struct ieee80211_local
*local
=
3314 container_of(nb
, struct ieee80211_local
,
3315 network_latency_notifier
);
3317 mutex_lock(&local
->iflist_mtx
);
3318 ieee80211_recalc_ps(local
, latency_usec
);
3319 mutex_unlock(&local
->iflist_mtx
);
3324 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
3330 case NL80211_CHAN_WIDTH_20
:
3331 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3332 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3334 case NL80211_CHAN_WIDTH_40
:
3335 c
->width
= NL80211_CHAN_WIDTH_20
;
3336 c
->center_freq1
= c
->chan
->center_freq
;
3337 ret
= IEEE80211_STA_DISABLE_40MHZ
|
3338 IEEE80211_STA_DISABLE_VHT
;
3340 case NL80211_CHAN_WIDTH_80
:
3341 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3345 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
3346 c
->width
= NL80211_CHAN_WIDTH_40
;
3347 ret
= IEEE80211_STA_DISABLE_VHT
;
3349 case NL80211_CHAN_WIDTH_80P80
:
3350 c
->center_freq2
= 0;
3351 c
->width
= NL80211_CHAN_WIDTH_80
;
3352 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3353 IEEE80211_STA_DISABLE_160MHZ
;
3355 case NL80211_CHAN_WIDTH_160
:
3357 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
3360 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
3361 c
->width
= NL80211_CHAN_WIDTH_80
;
3362 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
3363 IEEE80211_STA_DISABLE_160MHZ
;
3366 case NL80211_CHAN_WIDTH_20_NOHT
:
3368 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3369 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3373 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
3379 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
3380 struct ieee80211_supported_band
*sband
,
3381 struct ieee80211_channel
*channel
,
3382 const struct ieee80211_ht_operation
*ht_oper
,
3383 const struct ieee80211_vht_operation
*vht_oper
,
3384 struct cfg80211_chan_def
*chandef
)
3386 struct cfg80211_chan_def vht_chandef
;
3389 chandef
->chan
= channel
;
3390 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
3391 chandef
->center_freq1
= channel
->center_freq
;
3392 chandef
->center_freq2
= 0;
3394 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
3395 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3399 chandef
->width
= NL80211_CHAN_WIDTH_20
;
3401 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3403 /* check that channel matches the right operating channel */
3404 if (channel
->center_freq
!= ht_cfreq
) {
3406 * It's possible that some APs are confused here;
3407 * Netgear WNDR3700 sometimes reports 4 higher than
3408 * the actual channel in association responses, but
3409 * since we look at probe response/beacon data here
3413 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3414 channel
->center_freq
, ht_cfreq
,
3415 ht_oper
->primary_chan
, channel
->band
);
3416 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
3420 /* check 40 MHz support, if we have it */
3421 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3422 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3423 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3424 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3425 chandef
->center_freq1
+= 10;
3427 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3428 chandef
->width
= NL80211_CHAN_WIDTH_40
;
3429 chandef
->center_freq1
-= 10;
3433 /* 40 MHz (and 80 MHz) must be supported for VHT */
3434 ret
= IEEE80211_STA_DISABLE_VHT
;
3438 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
3439 ret
= IEEE80211_STA_DISABLE_VHT
;
3443 vht_chandef
.chan
= channel
;
3444 vht_chandef
.center_freq1
=
3445 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
3447 vht_chandef
.center_freq2
= 0;
3449 if (vht_oper
->center_freq_seg2_idx
)
3450 vht_chandef
.center_freq2
=
3451 ieee80211_channel_to_frequency(
3452 vht_oper
->center_freq_seg2_idx
,
3455 switch (vht_oper
->chan_width
) {
3456 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
3457 vht_chandef
.width
= chandef
->width
;
3459 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
3460 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
3462 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
3463 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
3465 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
3466 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
3470 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3471 vht_oper
->chan_width
);
3472 ret
= IEEE80211_STA_DISABLE_VHT
;
3476 if (!cfg80211_chandef_valid(&vht_chandef
)) {
3478 "AP VHT information is invalid, disable VHT\n");
3479 ret
= IEEE80211_STA_DISABLE_VHT
;
3483 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
3488 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
3490 "AP VHT information doesn't match HT, disable VHT\n");
3491 ret
= IEEE80211_STA_DISABLE_VHT
;
3495 *chandef
= vht_chandef
;
3499 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
3500 IEEE80211_CHAN_DISABLED
)) {
3501 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
3502 ret
= IEEE80211_STA_DISABLE_HT
|
3503 IEEE80211_STA_DISABLE_VHT
;
3507 ret
= chandef_downgrade(chandef
);
3510 if (chandef
->width
!= vht_chandef
.width
)
3512 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3515 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
3519 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3520 struct cfg80211_bss
*cbss
)
3522 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3523 const u8
*ht_cap_ie
, *vht_cap_ie
;
3524 const struct ieee80211_ht_cap
*ht_cap
;
3525 const struct ieee80211_vht_cap
*vht_cap
;
3528 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3531 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3532 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3533 ht_cap
= (void *)(ht_cap_ie
+ 2);
3534 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3536 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3537 * "Tx Unequal Modulation Supported" fields.
3541 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3544 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3545 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3549 vht_cap
= (void *)(vht_cap_ie
+ 2);
3550 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3551 for (nss
= 8; nss
> 0; nss
--) {
3552 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3553 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3556 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3557 chains
= max(chains
, nss
);
3563 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3564 struct cfg80211_bss
*cbss
)
3566 struct ieee80211_local
*local
= sdata
->local
;
3567 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3568 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3569 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3570 struct ieee80211_supported_band
*sband
;
3571 struct cfg80211_chan_def chandef
;
3574 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3576 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3577 IEEE80211_STA_DISABLE_80P80MHZ
|
3578 IEEE80211_STA_DISABLE_160MHZ
);
3582 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3583 sband
->ht_cap
.ht_supported
) {
3584 const u8
*ht_oper_ie
;
3586 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3587 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3588 ht_oper
= (void *)(ht_oper_ie
+ 2);
3591 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3592 sband
->vht_cap
.vht_supported
) {
3593 const u8
*vht_oper_ie
;
3595 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3596 WLAN_EID_VHT_OPERATION
);
3597 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3598 vht_oper
= (void *)(vht_oper_ie
+ 2);
3599 if (vht_oper
&& !ht_oper
) {
3602 "AP advertised VHT without HT, disabling both\n");
3603 sdata
->flags
|= IEEE80211_STA_DISABLE_HT
;
3604 sdata
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3608 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3613 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3618 /* will change later if needed */
3619 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3622 * If this fails (possibly due to channel context sharing
3623 * on incompatible channels, e.g. 80+80 and 160 sharing the
3624 * same control channel) try to use a smaller bandwidth.
3626 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3627 IEEE80211_CHANCTX_SHARED
);
3628 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
)
3629 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3633 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3634 struct cfg80211_bss
*cbss
, bool assoc
)
3636 struct ieee80211_local
*local
= sdata
->local
;
3637 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3638 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3639 struct sta_info
*new_sta
= NULL
;
3640 bool have_sta
= false;
3643 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3648 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3653 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3658 mutex_lock(&local
->mtx
);
3659 ieee80211_recalc_idle(sdata
->local
);
3660 mutex_unlock(&local
->mtx
);
3663 u32 rates
= 0, basic_rates
= 0;
3664 bool have_higher_than_11mbit
;
3665 int min_rate
= INT_MAX
, min_rate_index
= -1;
3666 struct ieee80211_supported_band
*sband
;
3668 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3670 err
= ieee80211_prep_channel(sdata
, cbss
);
3672 sta_info_free(local
, new_sta
);
3676 ieee80211_get_rates(sband
, bss
->supp_rates
,
3677 bss
->supp_rates_len
,
3678 &rates
, &basic_rates
,
3679 &have_higher_than_11mbit
,
3680 &min_rate
, &min_rate_index
);
3683 * This used to be a workaround for basic rates missing
3684 * in the association response frame. Now that we no
3685 * longer use the basic rates from there, it probably
3686 * doesn't happen any more, but keep the workaround so
3687 * in case some *other* APs are buggy in different ways
3688 * we can connect -- with a warning.
3690 if (!basic_rates
&& min_rate_index
>= 0) {
3692 "No basic rates, using min rate instead\n");
3693 basic_rates
= BIT(min_rate_index
);
3696 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3697 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3699 /* cf. IEEE 802.11 9.2.12 */
3700 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3701 have_higher_than_11mbit
)
3702 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3704 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3706 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3708 /* set timing information */
3709 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3710 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3711 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3713 /* tell driver about BSSID, basic rates and timing */
3714 ieee80211_bss_info_change_notify(sdata
,
3715 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3716 BSS_CHANGED_BEACON_INT
);
3719 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3721 err
= sta_info_insert(new_sta
);
3725 "failed to insert STA entry for the AP (error %d)\n",
3730 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3736 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3737 struct cfg80211_auth_request
*req
)
3739 struct ieee80211_local
*local
= sdata
->local
;
3740 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3741 struct ieee80211_mgd_auth_data
*auth_data
;
3745 /* prepare auth data structure */
3747 switch (req
->auth_type
) {
3748 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3749 auth_alg
= WLAN_AUTH_OPEN
;
3751 case NL80211_AUTHTYPE_SHARED_KEY
:
3752 if (IS_ERR(local
->wep_tx_tfm
))
3754 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3756 case NL80211_AUTHTYPE_FT
:
3757 auth_alg
= WLAN_AUTH_FT
;
3759 case NL80211_AUTHTYPE_NETWORK_EAP
:
3760 auth_alg
= WLAN_AUTH_LEAP
;
3762 case NL80211_AUTHTYPE_SAE
:
3763 auth_alg
= WLAN_AUTH_SAE
;
3769 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3770 req
->ie_len
, GFP_KERNEL
);
3774 auth_data
->bss
= req
->bss
;
3776 if (req
->sae_data_len
>= 4) {
3777 __le16
*pos
= (__le16
*) req
->sae_data
;
3778 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3779 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3780 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3781 req
->sae_data_len
- 4);
3782 auth_data
->data_len
+= req
->sae_data_len
- 4;
3785 if (req
->ie
&& req
->ie_len
) {
3786 memcpy(&auth_data
->data
[auth_data
->data_len
],
3787 req
->ie
, req
->ie_len
);
3788 auth_data
->data_len
+= req
->ie_len
;
3791 if (req
->key
&& req
->key_len
) {
3792 auth_data
->key_len
= req
->key_len
;
3793 auth_data
->key_idx
= req
->key_idx
;
3794 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3797 auth_data
->algorithm
= auth_alg
;
3799 /* try to authenticate/probe */
3801 mutex_lock(&ifmgd
->mtx
);
3803 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3804 ifmgd
->assoc_data
) {
3809 if (ifmgd
->auth_data
)
3810 ieee80211_destroy_auth_data(sdata
, false);
3812 /* prep auth_data so we don't go into idle on disassoc */
3813 ifmgd
->auth_data
= auth_data
;
3815 if (ifmgd
->associated
)
3816 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3818 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3820 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3824 err
= ieee80211_probe_auth(sdata
);
3826 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3830 /* hold our own reference */
3831 cfg80211_ref_bss(auth_data
->bss
);
3836 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3837 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3838 ifmgd
->auth_data
= NULL
;
3842 mutex_unlock(&ifmgd
->mtx
);
3847 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3848 struct cfg80211_assoc_request
*req
)
3850 struct ieee80211_local
*local
= sdata
->local
;
3851 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3852 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3853 struct ieee80211_mgd_assoc_data
*assoc_data
;
3854 const struct cfg80211_bss_ies
*beacon_ies
;
3855 struct ieee80211_supported_band
*sband
;
3856 const u8
*ssidie
, *ht_ie
, *vht_ie
;
3859 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3864 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3870 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3871 assoc_data
->ssid_len
= ssidie
[1];
3874 mutex_lock(&ifmgd
->mtx
);
3876 if (ifmgd
->associated
)
3877 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3879 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3884 if (ifmgd
->assoc_data
) {
3889 if (ifmgd
->auth_data
) {
3892 /* keep sta info, bssid if matching */
3893 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3894 ieee80211_destroy_auth_data(sdata
, match
);
3897 /* prepare assoc data */
3899 ifmgd
->beacon_crc_valid
= false;
3902 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3903 * We still associate in non-HT mode (11a/b/g) if any one of these
3904 * ciphers is configured as pairwise.
3905 * We can set this to true for non-11n hardware, that'll be checked
3906 * separately along with the peer capabilities.
3908 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3909 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3910 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3911 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3912 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3913 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3914 netdev_info(sdata
->dev
,
3915 "disabling HT/VHT due to WEP/TKIP use\n");
3919 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3920 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3921 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3924 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3925 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3926 if (!sband
->ht_cap
.ht_supported
||
3927 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3928 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3930 netdev_info(sdata
->dev
,
3931 "disabling HT as WMM/QoS is not supported by the AP\n");
3934 /* disable VHT if we don't support it or the AP doesn't use WMM */
3935 if (!sband
->vht_cap
.vht_supported
||
3936 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3937 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3939 netdev_info(sdata
->dev
,
3940 "disabling VHT as WMM/QoS is not supported by the AP\n");
3943 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3944 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3945 sizeof(ifmgd
->ht_capa_mask
));
3947 if (req
->ie
&& req
->ie_len
) {
3948 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3949 assoc_data
->ie_len
= req
->ie_len
;
3952 assoc_data
->bss
= req
->bss
;
3954 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3955 if (ifmgd
->powersave
)
3956 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3958 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3960 sdata
->smps_mode
= ifmgd
->req_smps
;
3962 assoc_data
->capability
= req
->bss
->capability
;
3963 assoc_data
->wmm
= bss
->wmm_used
&&
3964 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3965 assoc_data
->supp_rates
= bss
->supp_rates
;
3966 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3969 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3970 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3971 assoc_data
->ap_ht_param
=
3972 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3974 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3975 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
3976 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
3977 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
3978 sizeof(struct ieee80211_vht_cap
));
3980 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3983 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3984 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3985 assoc_data
->uapsd
= true;
3986 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3988 assoc_data
->uapsd
= false;
3989 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3992 if (req
->prev_bssid
)
3993 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3996 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3997 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3999 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4000 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4003 if (req
->crypto
.control_port
)
4004 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4006 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4008 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4009 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4011 /* kick off associate process */
4013 ifmgd
->assoc_data
= assoc_data
;
4014 ifmgd
->dtim_period
= 0;
4016 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4021 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4023 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4026 * Wait up to one beacon interval ...
4027 * should this be more if we miss one?
4029 sdata_info(sdata
, "waiting for beacon from %pM\n",
4031 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4032 assoc_data
->need_beacon
= true;
4033 } else if (beacon_ies
) {
4034 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4037 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4038 const struct ieee80211_tim_ie
*tim
;
4039 tim
= (void *)(tim_ie
+ 2);
4040 ifmgd
->dtim_period
= tim
->dtim_period
;
4042 assoc_data
->have_beacon
= true;
4043 assoc_data
->timeout
= jiffies
;
4045 assoc_data
->timeout
= jiffies
;
4049 run_again(ifmgd
, assoc_data
->timeout
);
4051 if (bss
->corrupt_data
) {
4052 char *corrupt_type
= "data";
4053 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4054 if (bss
->corrupt_data
&
4055 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4056 corrupt_type
= "beacon and probe response";
4058 corrupt_type
= "beacon";
4059 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4060 corrupt_type
= "probe response";
4061 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4068 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4069 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4070 ifmgd
->assoc_data
= NULL
;
4074 mutex_unlock(&ifmgd
->mtx
);
4079 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4080 struct cfg80211_deauth_request
*req
)
4082 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4083 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4084 bool tx
= !req
->local_state_change
;
4085 bool sent_frame
= false;
4087 mutex_lock(&ifmgd
->mtx
);
4090 "deauthenticating from %pM by local choice (reason=%d)\n",
4091 req
->bssid
, req
->reason_code
);
4093 if (ifmgd
->auth_data
) {
4094 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4095 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4096 IEEE80211_STYPE_DEAUTH
,
4097 req
->reason_code
, tx
,
4099 ieee80211_destroy_auth_data(sdata
, false);
4100 mutex_unlock(&ifmgd
->mtx
);
4106 if (ifmgd
->associated
&&
4107 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4108 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4109 req
->reason_code
, tx
, frame_buf
);
4112 mutex_unlock(&ifmgd
->mtx
);
4115 mutex_lock(&sdata
->local
->mtx
);
4116 ieee80211_recalc_idle(sdata
->local
);
4117 mutex_unlock(&sdata
->local
->mtx
);
4120 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4121 IEEE80211_DEAUTH_FRAME_LEN
);
4126 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4127 struct cfg80211_disassoc_request
*req
)
4129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4131 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4133 mutex_lock(&ifmgd
->mtx
);
4136 * cfg80211 should catch this ... but it's racy since
4137 * we can receive a disassoc frame, process it, hand it
4138 * to cfg80211 while that's in a locked section already
4139 * trying to tell us that the user wants to disconnect.
4141 if (ifmgd
->associated
!= req
->bss
) {
4142 mutex_unlock(&ifmgd
->mtx
);
4147 "disassociating from %pM by local choice (reason=%d)\n",
4148 req
->bss
->bssid
, req
->reason_code
);
4150 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4151 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4152 req
->reason_code
, !req
->local_state_change
,
4154 mutex_unlock(&ifmgd
->mtx
);
4156 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4157 IEEE80211_DEAUTH_FRAME_LEN
);
4159 mutex_lock(&sdata
->local
->mtx
);
4160 ieee80211_recalc_idle(sdata
->local
);
4161 mutex_unlock(&sdata
->local
->mtx
);
4166 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4168 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4170 mutex_lock(&ifmgd
->mtx
);
4171 if (ifmgd
->assoc_data
)
4172 ieee80211_destroy_assoc_data(sdata
, false);
4173 if (ifmgd
->auth_data
)
4174 ieee80211_destroy_auth_data(sdata
, false);
4175 del_timer_sync(&ifmgd
->timer
);
4176 mutex_unlock(&ifmgd
->mtx
);
4179 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4180 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4183 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4185 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4187 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4189 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);