2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
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 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
150 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 if (unlikely(!sdata
->u
.mgd
.associated
))
160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
163 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
164 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
166 ifmgd
->probe_send_count
= 0;
169 static int ecw2cw(int ecw
)
171 return (1 << ecw
) - 1;
174 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
175 struct ieee80211_ht_operation
*ht_oper
,
176 const u8
*bssid
, bool reconfig
)
178 struct ieee80211_local
*local
= sdata
->local
;
179 struct ieee80211_supported_band
*sband
;
180 struct sta_info
*sta
;
183 bool disable_40
= false;
185 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
187 switch (sdata
->vif
.bss_conf
.channel_type
) {
188 case NL80211_CHAN_HT40PLUS
:
189 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
192 case NL80211_CHAN_HT40MINUS
:
193 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
204 mutex_lock(&local
->sta_mtx
);
205 sta
= sta_info_get(sdata
, bssid
);
209 if (sta
&& !sta
->supports_40mhz
)
212 if (sta
&& (!reconfig
||
213 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
217 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
219 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
221 rate_control_rate_update(local
, sband
, sta
,
222 IEEE80211_RC_BW_CHANGED
);
224 mutex_unlock(&local
->sta_mtx
);
226 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
228 /* if bss configuration changed store the new one */
229 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
230 changed
|= BSS_CHANGED_HT
;
231 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
240 struct ieee80211_supported_band
*sband
,
246 for (i
= 0; i
< supp_rates_len
; i
++) {
247 int rate
= (supp_rates
[i
] & 0x7F) * 5;
249 for (j
= 0; j
< sband
->n_bitrates
; j
++)
250 if (sband
->bitrates
[j
].bitrate
== rate
) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
261 struct sk_buff
*skb
, u8 ap_ht_param
,
262 struct ieee80211_supported_band
*sband
,
263 struct ieee80211_channel
*channel
,
264 enum ieee80211_smps_mode smps
)
267 u32 flags
= channel
->flags
;
269 struct ieee80211_sta_ht_cap ht_cap
;
271 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
273 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
274 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
276 /* determine capability flags */
279 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
281 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
282 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
283 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
287 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
288 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
289 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
299 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
300 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
301 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
304 /* set SM PS mode properly */
305 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
307 case IEEE80211_SMPS_AUTOMATIC
:
308 case IEEE80211_SMPS_NUM_MODES
:
310 case IEEE80211_SMPS_OFF
:
311 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
312 IEEE80211_HT_CAP_SM_PS_SHIFT
;
314 case IEEE80211_SMPS_STATIC
:
315 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
316 IEEE80211_HT_CAP_SM_PS_SHIFT
;
318 case IEEE80211_SMPS_DYNAMIC
:
319 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
320 IEEE80211_HT_CAP_SM_PS_SHIFT
;
324 /* reserve and fill IE */
325 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
326 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
329 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
331 struct ieee80211_supported_band
*sband
)
335 struct ieee80211_sta_vht_cap vht_cap
;
337 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
339 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
341 /* determine capability flags */
344 /* reserve and fill IE */
345 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_capabilities
) + 2);
346 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
349 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
351 struct ieee80211_local
*local
= sdata
->local
;
352 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
353 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
355 struct ieee80211_mgmt
*mgmt
;
357 size_t offset
= 0, noffset
;
358 int i
, count
, rates_len
, supp_rates_len
;
360 struct ieee80211_supported_band
*sband
;
363 lockdep_assert_held(&ifmgd
->mtx
);
365 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
367 if (assoc_data
->supp_rates_len
) {
369 * Get all rates supported by the device and the AP as
370 * some APs don't like getting a superset of their rates
371 * in the association request (e.g. D-Link DAP 1353 in
374 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
375 assoc_data
->supp_rates_len
,
379 * In case AP not provide any supported rates information
380 * before association, we send information element(s) with
381 * all rates that we support.
384 rates_len
= sband
->n_bitrates
;
387 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
388 sizeof(*mgmt
) + /* bit too much but doesn't matter */
389 2 + assoc_data
->ssid_len
+ /* SSID */
390 4 + rates_len
+ /* (extended) rates */
391 4 + /* power capability */
392 2 + 2 * sband
->n_channels
+ /* supported channels */
393 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
394 2 + sizeof(struct ieee80211_vht_capabilities
) + /* VHT */
395 assoc_data
->ie_len
+ /* extra IEs */
401 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
403 capab
= WLAN_CAPABILITY_ESS
;
405 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
406 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
407 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
408 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
409 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
412 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
413 capab
|= WLAN_CAPABILITY_PRIVACY
;
415 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
416 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
417 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
419 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
421 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
422 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
423 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
425 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
427 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
428 IEEE80211_STYPE_REASSOC_REQ
);
429 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
430 mgmt
->u
.reassoc_req
.listen_interval
=
431 cpu_to_le16(local
->hw
.conf
.listen_interval
);
432 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
436 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
437 IEEE80211_STYPE_ASSOC_REQ
);
438 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
439 mgmt
->u
.assoc_req
.listen_interval
=
440 cpu_to_le16(local
->hw
.conf
.listen_interval
);
444 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
445 *pos
++ = WLAN_EID_SSID
;
446 *pos
++ = assoc_data
->ssid_len
;
447 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
449 /* add all rates which were marked to be used above */
450 supp_rates_len
= rates_len
;
451 if (supp_rates_len
> 8)
454 pos
= skb_put(skb
, supp_rates_len
+ 2);
455 *pos
++ = WLAN_EID_SUPP_RATES
;
456 *pos
++ = supp_rates_len
;
459 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
460 if (BIT(i
) & rates
) {
461 int rate
= sband
->bitrates
[i
].bitrate
;
462 *pos
++ = (u8
) (rate
/ 5);
468 if (rates_len
> count
) {
469 pos
= skb_put(skb
, rates_len
- count
+ 2);
470 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
471 *pos
++ = rates_len
- count
;
473 for (i
++; i
< sband
->n_bitrates
; i
++) {
474 if (BIT(i
) & rates
) {
475 int rate
= sband
->bitrates
[i
].bitrate
;
476 *pos
++ = (u8
) (rate
/ 5);
481 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
482 /* 1. power capabilities */
483 pos
= skb_put(skb
, 4);
484 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
486 *pos
++ = 0; /* min tx power */
487 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
489 /* 2. supported channels */
490 /* TODO: get this in reg domain format */
491 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
492 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
493 *pos
++ = 2 * sband
->n_channels
;
494 for (i
= 0; i
< sband
->n_channels
; i
++) {
495 *pos
++ = ieee80211_frequency_to_channel(
496 sband
->channels
[i
].center_freq
);
497 *pos
++ = 1; /* one channel in the subband*/
501 /* if present, add any custom IEs that go before HT */
502 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
503 static const u8 before_ht
[] = {
506 WLAN_EID_EXT_SUPP_RATES
,
507 WLAN_EID_PWR_CAPABILITY
,
508 WLAN_EID_SUPPORTED_CHANNELS
,
511 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
512 WLAN_EID_MOBILITY_DOMAIN
,
513 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
515 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
516 before_ht
, ARRAY_SIZE(before_ht
),
518 pos
= skb_put(skb
, noffset
- offset
);
519 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
523 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
524 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
525 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
527 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
528 ieee80211_add_vht_ie(sdata
, skb
, sband
);
530 /* if present, add any custom non-vendor IEs that go after HT */
531 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
532 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
535 pos
= skb_put(skb
, noffset
- offset
);
536 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
540 if (assoc_data
->wmm
) {
541 if (assoc_data
->uapsd
) {
542 qos_info
= ifmgd
->uapsd_queues
;
543 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
544 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
549 pos
= skb_put(skb
, 9);
550 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
551 *pos
++ = 7; /* len */
552 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
555 *pos
++ = 2; /* WME */
556 *pos
++ = 0; /* WME info */
557 *pos
++ = 1; /* WME ver */
561 /* add any remaining custom (i.e. vendor specific here) IEs */
562 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
563 noffset
= assoc_data
->ie_len
;
564 pos
= skb_put(skb
, noffset
- offset
);
565 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
568 drv_mgd_prepare_tx(local
, sdata
);
570 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
571 ieee80211_tx_skb(sdata
, skb
);
574 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
575 const u8
*bssid
, u16 stype
,
576 u16 reason
, bool send_frame
,
579 struct ieee80211_local
*local
= sdata
->local
;
580 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
582 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
585 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
586 mgmt
->duration
= 0; /* initialize only */
587 mgmt
->seq_ctrl
= 0; /* initialize only */
588 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
589 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
590 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
591 /* u.deauth.reason_code == u.disassoc.reason_code */
592 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
595 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
596 DEAUTH_DISASSOC_LEN
);
600 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
603 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
604 mgmt
, DEAUTH_DISASSOC_LEN
);
606 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
607 IEEE80211_SKB_CB(skb
)->flags
|=
608 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
610 drv_mgd_prepare_tx(local
, sdata
);
612 ieee80211_tx_skb(sdata
, skb
);
616 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
617 struct ieee80211_sub_if_data
*sdata
)
619 struct ieee80211_pspoll
*pspoll
;
622 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
626 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
627 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
629 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
630 ieee80211_tx_skb(sdata
, skb
);
633 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
634 struct ieee80211_sub_if_data
*sdata
,
638 struct ieee80211_hdr_3addr
*nullfunc
;
639 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
641 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
645 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
647 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
649 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
650 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
651 IEEE80211_STA_CONNECTION_POLL
))
652 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
654 ieee80211_tx_skb(sdata
, skb
);
657 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
658 struct ieee80211_sub_if_data
*sdata
)
661 struct ieee80211_hdr
*nullfunc
;
664 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
667 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
671 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
673 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
674 memset(nullfunc
, 0, 30);
675 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
676 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
677 nullfunc
->frame_control
= fc
;
678 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
679 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
680 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
681 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
683 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
684 ieee80211_tx_skb(sdata
, skb
);
687 /* spectrum management related things */
688 static void ieee80211_chswitch_work(struct work_struct
*work
)
690 struct ieee80211_sub_if_data
*sdata
=
691 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
692 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
694 if (!ieee80211_sdata_running(sdata
))
697 mutex_lock(&ifmgd
->mtx
);
698 if (!ifmgd
->associated
)
701 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
702 if (!sdata
->local
->ops
->channel_switch
) {
703 /* call "hw_config" only if doing sw channel switch */
704 ieee80211_hw_config(sdata
->local
,
705 IEEE80211_CONF_CHANGE_CHANNEL
);
707 /* update the device channel directly */
708 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
711 /* XXX: shouldn't really modify cfg80211-owned data! */
712 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
714 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
715 IEEE80211_QUEUE_STOP_REASON_CSA
);
717 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
718 mutex_unlock(&ifmgd
->mtx
);
721 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
723 struct ieee80211_sub_if_data
*sdata
;
724 struct ieee80211_if_managed
*ifmgd
;
726 sdata
= vif_to_sdata(vif
);
727 ifmgd
= &sdata
->u
.mgd
;
729 trace_api_chswitch_done(sdata
, success
);
732 * If the channel switch was not successful, stay
733 * around on the old channel. We currently lack
734 * good handling of this situation, possibly we
735 * should just drop the association.
737 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
740 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
742 EXPORT_SYMBOL(ieee80211_chswitch_done
);
744 static void ieee80211_chswitch_timer(unsigned long data
)
746 struct ieee80211_sub_if_data
*sdata
=
747 (struct ieee80211_sub_if_data
*) data
;
748 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
750 if (sdata
->local
->quiescing
) {
751 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
755 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
758 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
759 struct ieee80211_channel_sw_ie
*sw_elem
,
760 struct ieee80211_bss
*bss
,
763 struct cfg80211_bss
*cbss
=
764 container_of((void *)bss
, struct cfg80211_bss
, priv
);
765 struct ieee80211_channel
*new_ch
;
766 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
767 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
768 cbss
->channel
->band
);
770 ASSERT_MGD_MTX(ifmgd
);
772 if (!ifmgd
->associated
)
775 if (sdata
->local
->scanning
)
778 /* Disregard subsequent beacons if we are already running a timer
781 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
784 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
785 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
788 sdata
->local
->csa_channel
= new_ch
;
790 if (sdata
->local
->ops
->channel_switch
) {
791 /* use driver's channel switch callback */
792 struct ieee80211_channel_switch ch_switch
;
793 memset(&ch_switch
, 0, sizeof(ch_switch
));
794 ch_switch
.timestamp
= timestamp
;
796 ch_switch
.block_tx
= true;
797 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
798 IEEE80211_QUEUE_STOP_REASON_CSA
);
800 ch_switch
.channel
= new_ch
;
801 ch_switch
.count
= sw_elem
->count
;
802 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
803 drv_channel_switch(sdata
->local
, &ch_switch
);
807 /* channel switch handled in software */
808 if (sw_elem
->count
<= 1) {
809 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
812 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
813 IEEE80211_QUEUE_STOP_REASON_CSA
);
814 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
815 mod_timer(&ifmgd
->chswitch_timer
,
817 msecs_to_jiffies(sw_elem
->count
*
818 cbss
->beacon_interval
));
822 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
823 u16 capab_info
, u8
*pwr_constr_elem
,
824 u8 pwr_constr_elem_len
)
826 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
828 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
831 /* Power constraint IE length should be 1 octet */
832 if (pwr_constr_elem_len
!= 1)
835 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
836 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
837 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
838 ieee80211_hw_config(sdata
->local
, 0);
842 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
844 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
845 struct ieee80211_local
*local
= sdata
->local
;
846 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
848 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
849 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
850 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
852 local
->disable_dynamic_ps
= false;
853 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
855 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
857 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
859 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
860 struct ieee80211_local
*local
= sdata
->local
;
861 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
863 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
864 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
865 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
867 local
->disable_dynamic_ps
= true;
868 conf
->dynamic_ps_timeout
= 0;
869 del_timer_sync(&local
->dynamic_ps_timer
);
870 ieee80211_queue_work(&local
->hw
,
871 &local
->dynamic_ps_enable_work
);
873 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
876 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
877 struct ieee80211_sub_if_data
*sdata
)
879 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
882 * If we are scanning right now then the parameters will
883 * take effect when scan finishes.
888 if (conf
->dynamic_ps_timeout
> 0 &&
889 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
890 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
891 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
893 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
894 ieee80211_send_nullfunc(local
, sdata
, 1);
896 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
897 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
900 conf
->flags
|= IEEE80211_CONF_PS
;
901 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
905 static void ieee80211_change_ps(struct ieee80211_local
*local
)
907 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
909 if (local
->ps_sdata
) {
910 ieee80211_enable_ps(local
, local
->ps_sdata
);
911 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
912 conf
->flags
&= ~IEEE80211_CONF_PS
;
913 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
914 del_timer_sync(&local
->dynamic_ps_timer
);
915 cancel_work_sync(&local
->dynamic_ps_enable_work
);
919 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
921 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
922 struct sta_info
*sta
= NULL
;
923 bool authorized
= false;
931 if (!mgd
->associated
)
934 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
935 IEEE80211_STA_CONNECTION_POLL
))
939 sta
= sta_info_get(sdata
, mgd
->bssid
);
941 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
947 /* need to hold RTNL or interface lock */
948 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
950 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
954 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
955 local
->ps_sdata
= NULL
;
959 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
960 if (!ieee80211_sdata_running(sdata
))
962 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
963 /* If an AP vif is found, then disable PS
964 * by setting the count to zero thereby setting
970 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
976 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
977 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
981 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
983 beaconint_us
= ieee80211_tu_to_usec(
984 found
->vif
.bss_conf
.beacon_int
);
986 timeout
= local
->dynamic_ps_forced_timeout
;
989 * Go to full PSM if the user configures a very low
990 * latency requirement.
991 * The 2000 second value is there for compatibility
992 * until the PM_QOS_NETWORK_LATENCY is configured
995 if (latency
> (1900 * USEC_PER_MSEC
) &&
996 latency
!= (2000 * USEC_PER_SEC
))
1001 local
->dynamic_ps_user_timeout
= timeout
;
1002 if (!local
->disable_dynamic_ps
)
1003 conf
->dynamic_ps_timeout
=
1004 local
->dynamic_ps_user_timeout
;
1006 if (beaconint_us
> latency
) {
1007 local
->ps_sdata
= NULL
;
1009 struct ieee80211_bss
*bss
;
1013 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1014 dtimper
= bss
->dtim_period
;
1016 /* If the TIM IE is invalid, pretend the value is 1 */
1019 else if (dtimper
> 1)
1020 maxslp
= min_t(int, dtimper
,
1021 latency
/ beaconint_us
);
1023 local
->hw
.conf
.max_sleep_period
= maxslp
;
1024 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1025 local
->ps_sdata
= found
;
1028 local
->ps_sdata
= NULL
;
1031 ieee80211_change_ps(local
);
1034 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1036 struct ieee80211_local
*local
=
1037 container_of(work
, struct ieee80211_local
,
1038 dynamic_ps_disable_work
);
1040 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1041 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1042 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1045 ieee80211_wake_queues_by_reason(&local
->hw
,
1046 IEEE80211_QUEUE_STOP_REASON_PS
);
1049 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1051 struct ieee80211_local
*local
=
1052 container_of(work
, struct ieee80211_local
,
1053 dynamic_ps_enable_work
);
1054 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1055 struct ieee80211_if_managed
*ifmgd
;
1056 unsigned long flags
;
1059 /* can only happen when PS was just disabled anyway */
1063 ifmgd
= &sdata
->u
.mgd
;
1065 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1068 if (!local
->disable_dynamic_ps
&&
1069 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1070 /* don't enter PS if TX frames are pending */
1071 if (drv_tx_frames_pending(local
)) {
1072 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1074 local
->hw
.conf
.dynamic_ps_timeout
));
1079 * transmission can be stopped by others which leads to
1080 * dynamic_ps_timer expiry. Postpone the ps timer if it
1081 * is not the actual idle state.
1083 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1084 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1085 if (local
->queue_stop_reasons
[q
]) {
1086 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1088 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1090 local
->hw
.conf
.dynamic_ps_timeout
));
1094 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1097 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1098 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1099 netif_tx_stop_all_queues(sdata
->dev
);
1101 if (drv_tx_frames_pending(local
))
1102 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1104 local
->hw
.conf
.dynamic_ps_timeout
));
1106 ieee80211_send_nullfunc(local
, sdata
, 1);
1107 /* Flush to get the tx status of nullfunc frame */
1108 drv_flush(local
, false);
1112 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1113 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1114 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1115 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1116 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1117 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1120 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1121 netif_tx_wake_all_queues(sdata
->dev
);
1124 void ieee80211_dynamic_ps_timer(unsigned long data
)
1126 struct ieee80211_local
*local
= (void *) data
;
1128 if (local
->quiescing
|| local
->suspended
)
1131 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1135 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1136 struct ieee80211_sub_if_data
*sdata
,
1137 u8
*wmm_param
, size_t wmm_param_len
)
1139 struct ieee80211_tx_queue_params params
;
1140 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1143 u8
*pos
, uapsd_queues
= 0;
1145 if (!local
->ops
->conf_tx
)
1148 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1154 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1157 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1158 uapsd_queues
= ifmgd
->uapsd_queues
;
1160 count
= wmm_param
[6] & 0x0f;
1161 if (count
== ifmgd
->wmm_last_param_set
)
1163 ifmgd
->wmm_last_param_set
= count
;
1165 pos
= wmm_param
+ 8;
1166 left
= wmm_param_len
- 8;
1168 memset(¶ms
, 0, sizeof(params
));
1171 for (; left
>= 4; left
-= 4, pos
+= 4) {
1172 int aci
= (pos
[0] >> 5) & 0x03;
1173 int acm
= (pos
[0] >> 4) & 0x01;
1181 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1182 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1188 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1189 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1195 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1196 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1203 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1204 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1209 params
.aifs
= pos
[0] & 0x0f;
1210 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1211 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1212 params
.txop
= get_unaligned_le16(pos
+ 2);
1213 params
.uapsd
= uapsd
;
1216 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1218 params
.aifs
, params
.cw_min
, params
.cw_max
,
1219 params
.txop
, params
.uapsd
);
1220 sdata
->tx_conf
[queue
] = params
;
1221 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1223 "failed to set TX queue parameters for queue %d\n",
1227 /* enable WMM or activate new settings */
1228 sdata
->vif
.bss_conf
.qos
= true;
1232 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1234 lockdep_assert_held(&sdata
->local
->mtx
);
1236 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1237 IEEE80211_STA_BEACON_POLL
);
1238 ieee80211_run_deferred_scan(sdata
->local
);
1241 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1243 mutex_lock(&sdata
->local
->mtx
);
1244 __ieee80211_stop_poll(sdata
);
1245 mutex_unlock(&sdata
->local
->mtx
);
1248 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1249 u16 capab
, bool erp_valid
, u8 erp
)
1251 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1253 bool use_protection
;
1254 bool use_short_preamble
;
1255 bool use_short_slot
;
1258 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1259 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1261 use_protection
= false;
1262 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1265 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1266 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1267 use_short_slot
= true;
1269 if (use_protection
!= bss_conf
->use_cts_prot
) {
1270 bss_conf
->use_cts_prot
= use_protection
;
1271 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1274 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1275 bss_conf
->use_short_preamble
= use_short_preamble
;
1276 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1279 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1280 bss_conf
->use_short_slot
= use_short_slot
;
1281 changed
|= BSS_CHANGED_ERP_SLOT
;
1287 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1288 struct cfg80211_bss
*cbss
,
1289 u32 bss_info_changed
)
1291 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1292 struct ieee80211_local
*local
= sdata
->local
;
1293 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1295 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1296 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1297 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1299 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1300 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1302 sdata
->u
.mgd
.associated
= cbss
;
1303 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1305 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1307 /* just to be sure */
1308 ieee80211_stop_poll(sdata
);
1310 ieee80211_led_assoc(local
, 1);
1312 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1313 bss_conf
->dtim_period
= bss
->dtim_period
;
1315 bss_conf
->dtim_period
= 0;
1317 bss_conf
->assoc
= 1;
1319 /* Tell the driver to monitor connection quality (if supported) */
1320 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1321 bss_conf
->cqm_rssi_thold
)
1322 bss_info_changed
|= BSS_CHANGED_CQM
;
1324 /* Enable ARP filtering */
1325 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1326 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1327 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1330 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1332 mutex_lock(&local
->iflist_mtx
);
1333 ieee80211_recalc_ps(local
, -1);
1334 ieee80211_recalc_smps(local
);
1335 mutex_unlock(&local
->iflist_mtx
);
1337 netif_tx_start_all_queues(sdata
->dev
);
1338 netif_carrier_on(sdata
->dev
);
1341 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1342 u16 stype
, u16 reason
, bool tx
,
1345 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1346 struct ieee80211_local
*local
= sdata
->local
;
1347 struct sta_info
*sta
;
1350 ASSERT_MGD_MTX(ifmgd
);
1352 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1355 if (WARN_ON(!ifmgd
->associated
))
1358 ieee80211_stop_poll(sdata
);
1360 ifmgd
->associated
= NULL
;
1363 * we need to commit the associated = NULL change because the
1364 * scan code uses that to determine whether this iface should
1365 * go to/wake up from powersave or not -- and could otherwise
1366 * wake the queues erroneously.
1371 * Thus, we can only afterwards stop the queues -- to account
1372 * for the case where another CPU is finishing a scan at this
1373 * time -- we don't want the scan code to enable queues.
1376 netif_tx_stop_all_queues(sdata
->dev
);
1377 netif_carrier_off(sdata
->dev
);
1379 mutex_lock(&local
->sta_mtx
);
1380 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1382 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1383 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1385 mutex_unlock(&local
->sta_mtx
);
1388 * if we want to get out of ps before disassoc (why?) we have
1389 * to do it before sending disassoc, as otherwise the null-packet
1392 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1393 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1394 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1396 local
->ps_sdata
= NULL
;
1398 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1400 drv_flush(local
, false);
1402 /* deauthenticate/disassociate now */
1403 if (tx
|| frame_buf
)
1404 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1405 reason
, tx
, frame_buf
);
1407 /* flush out frame */
1409 drv_flush(local
, false);
1411 /* clear bssid only after building the needed mgmt frames */
1412 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1414 /* remove AP and TDLS peers */
1415 sta_info_flush(local
, sdata
);
1417 /* finally reset all BSS / config parameters */
1418 changed
|= ieee80211_reset_erp_info(sdata
);
1420 ieee80211_led_assoc(local
, 0);
1421 changed
|= BSS_CHANGED_ASSOC
;
1422 sdata
->vif
.bss_conf
.assoc
= false;
1424 /* on the next assoc, re-program HT parameters */
1425 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1426 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1428 local
->power_constr_level
= 0;
1430 del_timer_sync(&local
->dynamic_ps_timer
);
1431 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1433 /* Disable ARP filtering */
1434 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1435 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1436 changed
|= BSS_CHANGED_ARP_FILTER
;
1439 sdata
->vif
.bss_conf
.qos
= false;
1440 changed
|= BSS_CHANGED_QOS
;
1442 /* The BSSID (not really interesting) and HT changed */
1443 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1444 ieee80211_bss_info_change_notify(sdata
, changed
);
1446 /* channel(_type) changes are handled by ieee80211_hw_config */
1447 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1448 ieee80211_hw_config(local
, 0);
1450 /* disassociated - set to defaults now */
1451 ieee80211_set_wmm_default(sdata
, false);
1453 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1454 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1455 del_timer_sync(&sdata
->u
.mgd
.timer
);
1456 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1459 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1460 struct ieee80211_hdr
*hdr
)
1463 * We can postpone the mgd.timer whenever receiving unicast frames
1464 * from AP because we know that the connection is working both ways
1465 * at that time. But multicast frames (and hence also beacons) must
1466 * be ignored here, because we need to trigger the timer during
1467 * data idle periods for sending the periodic probe request to the
1468 * AP we're connected to.
1470 if (is_multicast_ether_addr(hdr
->addr1
))
1473 ieee80211_sta_reset_conn_monitor(sdata
);
1476 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1478 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1479 struct ieee80211_local
*local
= sdata
->local
;
1481 mutex_lock(&local
->mtx
);
1482 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1483 IEEE80211_STA_CONNECTION_POLL
))) {
1484 mutex_unlock(&local
->mtx
);
1488 __ieee80211_stop_poll(sdata
);
1490 mutex_lock(&local
->iflist_mtx
);
1491 ieee80211_recalc_ps(local
, -1);
1492 mutex_unlock(&local
->iflist_mtx
);
1494 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1498 * We've received a probe response, but are not sure whether
1499 * we have or will be receiving any beacons or data, so let's
1500 * schedule the timers again, just in case.
1502 ieee80211_sta_reset_beacon_monitor(sdata
);
1504 mod_timer(&ifmgd
->conn_mon_timer
,
1505 round_jiffies_up(jiffies
+
1506 IEEE80211_CONNECTION_IDLE_TIME
));
1508 mutex_unlock(&local
->mtx
);
1511 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1512 struct ieee80211_hdr
*hdr
, bool ack
)
1514 if (!ieee80211_is_data(hdr
->frame_control
))
1518 ieee80211_sta_reset_conn_monitor(sdata
);
1520 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1521 sdata
->u
.mgd
.probe_send_count
> 0) {
1523 sdata
->u
.mgd
.probe_send_count
= 0;
1525 sdata
->u
.mgd
.nullfunc_failed
= true;
1526 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1530 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1532 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1534 u8
*dst
= ifmgd
->associated
->bssid
;
1535 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1538 * Try sending broadcast probe requests for the last three
1539 * probe requests after the first ones failed since some
1540 * buggy APs only support broadcast probe requests.
1542 if (ifmgd
->probe_send_count
>= unicast_limit
)
1546 * When the hardware reports an accurate Tx ACK status, it's
1547 * better to send a nullfunc frame instead of a probe request,
1548 * as it will kick us off the AP quickly if we aren't associated
1549 * anymore. The timeout will be reset if the frame is ACKed by
1552 ifmgd
->probe_send_count
++;
1554 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1555 ifmgd
->nullfunc_failed
= false;
1556 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1560 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1561 if (WARN_ON_ONCE(ssid
== NULL
))
1566 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1567 0, (u32
) -1, true, false);
1570 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1571 run_again(ifmgd
, ifmgd
->probe_timeout
);
1572 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1573 drv_flush(sdata
->local
, false);
1576 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1579 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1580 bool already
= false;
1582 if (!ieee80211_sdata_running(sdata
))
1585 mutex_lock(&ifmgd
->mtx
);
1587 if (!ifmgd
->associated
)
1590 mutex_lock(&sdata
->local
->mtx
);
1592 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1593 mutex_unlock(&sdata
->local
->mtx
);
1598 mlme_dbg_ratelimited(sdata
,
1599 "detected beacon loss from AP - sending probe request\n");
1601 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1602 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1605 * The driver/our work has already reported this event or the
1606 * connection monitoring has kicked in and we have already sent
1607 * a probe request. Or maybe the AP died and the driver keeps
1608 * reporting until we disassociate...
1610 * In either case we have to ignore the current call to this
1611 * function (except for setting the correct probe reason bit)
1612 * because otherwise we would reset the timer every time and
1613 * never check whether we received a probe response!
1615 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1616 IEEE80211_STA_CONNECTION_POLL
))
1620 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1622 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1624 mutex_unlock(&sdata
->local
->mtx
);
1629 mutex_lock(&sdata
->local
->iflist_mtx
);
1630 ieee80211_recalc_ps(sdata
->local
, -1);
1631 mutex_unlock(&sdata
->local
->iflist_mtx
);
1633 ifmgd
->probe_send_count
= 0;
1634 ieee80211_mgd_probe_ap_send(sdata
);
1636 mutex_unlock(&ifmgd
->mtx
);
1639 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1640 struct ieee80211_vif
*vif
)
1642 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1643 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1644 struct cfg80211_bss
*cbss
;
1645 struct sk_buff
*skb
;
1649 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1652 ASSERT_MGD_MTX(ifmgd
);
1654 if (ifmgd
->associated
)
1655 cbss
= ifmgd
->associated
;
1656 else if (ifmgd
->auth_data
)
1657 cbss
= ifmgd
->auth_data
->bss
;
1658 else if (ifmgd
->assoc_data
)
1659 cbss
= ifmgd
->assoc_data
->bss
;
1663 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1664 if (WARN_ON_ONCE(ssid
== NULL
))
1669 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1670 (u32
) -1, ssid
+ 2, ssid_len
,
1675 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1677 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1679 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1680 struct ieee80211_local
*local
= sdata
->local
;
1682 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1684 mutex_lock(&ifmgd
->mtx
);
1685 if (!ifmgd
->associated
) {
1686 mutex_unlock(&ifmgd
->mtx
);
1690 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1692 sdata_info(sdata
, "Connection to AP %pM lost\n", bssid
);
1694 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1695 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1697 mutex_unlock(&ifmgd
->mtx
);
1700 * must be outside lock due to cfg80211,
1701 * but that's not a problem.
1703 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1705 mutex_lock(&local
->mtx
);
1706 ieee80211_recalc_idle(local
);
1707 mutex_unlock(&local
->mtx
);
1710 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1712 struct ieee80211_sub_if_data
*sdata
=
1713 container_of(work
, struct ieee80211_sub_if_data
,
1714 u
.mgd
.beacon_connection_loss_work
);
1715 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1716 struct sta_info
*sta
;
1718 if (ifmgd
->associated
) {
1720 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1722 sta
->beacon_loss_count
++;
1726 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1727 __ieee80211_connection_loss(sdata
);
1729 ieee80211_mgd_probe_ap(sdata
, true);
1732 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1734 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1735 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1737 trace_api_beacon_loss(sdata
);
1739 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1740 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1742 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1744 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1746 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1747 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1749 trace_api_connection_loss(sdata
);
1751 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1752 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1754 EXPORT_SYMBOL(ieee80211_connection_loss
);
1757 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1760 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1762 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1765 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1767 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1768 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1771 cfg80211_put_bss(auth_data
->bss
);
1773 sdata
->u
.mgd
.auth_data
= NULL
;
1776 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1777 struct ieee80211_mgmt
*mgmt
, size_t len
)
1779 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1781 struct ieee802_11_elems elems
;
1783 pos
= mgmt
->u
.auth
.variable
;
1784 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1785 if (!elems
.challenge
)
1787 auth_data
->expected_transaction
= 4;
1788 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1789 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1790 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1791 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1792 auth_data
->key
, auth_data
->key_len
,
1793 auth_data
->key_idx
);
1796 static enum rx_mgmt_action __must_check
1797 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1798 struct ieee80211_mgmt
*mgmt
, size_t len
)
1800 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1802 u16 auth_alg
, auth_transaction
, status_code
;
1803 struct sta_info
*sta
;
1805 lockdep_assert_held(&ifmgd
->mtx
);
1808 return RX_MGMT_NONE
;
1810 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1811 return RX_MGMT_NONE
;
1813 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1815 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1816 return RX_MGMT_NONE
;
1818 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1819 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1820 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1822 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1823 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1824 return RX_MGMT_NONE
;
1826 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1827 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1828 mgmt
->sa
, status_code
);
1829 ieee80211_destroy_auth_data(sdata
, false);
1830 return RX_MGMT_CFG80211_RX_AUTH
;
1833 switch (ifmgd
->auth_data
->algorithm
) {
1834 case WLAN_AUTH_OPEN
:
1835 case WLAN_AUTH_LEAP
:
1838 case WLAN_AUTH_SHARED_KEY
:
1839 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1840 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1841 /* need another frame */
1842 return RX_MGMT_NONE
;
1846 WARN_ONCE(1, "invalid auth alg %d",
1847 ifmgd
->auth_data
->algorithm
);
1848 return RX_MGMT_NONE
;
1851 sdata_info(sdata
, "authenticated\n");
1852 ifmgd
->auth_data
->done
= true;
1853 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1854 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1856 /* move station state to auth */
1857 mutex_lock(&sdata
->local
->sta_mtx
);
1858 sta
= sta_info_get(sdata
, bssid
);
1860 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1863 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1864 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
1867 mutex_unlock(&sdata
->local
->sta_mtx
);
1869 return RX_MGMT_CFG80211_RX_AUTH
;
1871 mutex_unlock(&sdata
->local
->sta_mtx
);
1872 /* ignore frame -- wait for timeout */
1873 return RX_MGMT_NONE
;
1877 static enum rx_mgmt_action __must_check
1878 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1879 struct ieee80211_mgmt
*mgmt
, size_t len
)
1881 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1882 const u8
*bssid
= NULL
;
1885 lockdep_assert_held(&ifmgd
->mtx
);
1888 return RX_MGMT_NONE
;
1890 if (!ifmgd
->associated
||
1891 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1892 return RX_MGMT_NONE
;
1894 bssid
= ifmgd
->associated
->bssid
;
1896 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1898 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
1899 bssid
, reason_code
);
1901 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1903 mutex_lock(&sdata
->local
->mtx
);
1904 ieee80211_recalc_idle(sdata
->local
);
1905 mutex_unlock(&sdata
->local
->mtx
);
1907 return RX_MGMT_CFG80211_DEAUTH
;
1911 static enum rx_mgmt_action __must_check
1912 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1913 struct ieee80211_mgmt
*mgmt
, size_t len
)
1915 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1918 lockdep_assert_held(&ifmgd
->mtx
);
1921 return RX_MGMT_NONE
;
1923 if (!ifmgd
->associated
||
1924 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1925 return RX_MGMT_NONE
;
1927 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1929 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
1930 mgmt
->sa
, reason_code
);
1932 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1934 mutex_lock(&sdata
->local
->mtx
);
1935 ieee80211_recalc_idle(sdata
->local
);
1936 mutex_unlock(&sdata
->local
->mtx
);
1938 return RX_MGMT_CFG80211_DISASSOC
;
1941 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1942 u8
*supp_rates
, unsigned int supp_rates_len
,
1943 u32
*rates
, u32
*basic_rates
,
1944 bool *have_higher_than_11mbit
,
1945 int *min_rate
, int *min_rate_index
)
1949 for (i
= 0; i
< supp_rates_len
; i
++) {
1950 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1951 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1954 *have_higher_than_11mbit
= true;
1957 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1958 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1960 * Note: Even through the membership selector and the basic
1961 * rate flag share the same bit, they are not exactly
1964 if (!!(supp_rates
[i
] & 0x80) &&
1965 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1968 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1969 if (sband
->bitrates
[j
].bitrate
== rate
) {
1972 *basic_rates
|= BIT(j
);
1973 if (rate
< *min_rate
) {
1975 *min_rate_index
= j
;
1983 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1986 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1988 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1991 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1993 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1994 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1998 sdata
->u
.mgd
.assoc_data
= NULL
;
2001 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2002 struct cfg80211_bss
*cbss
,
2003 struct ieee80211_mgmt
*mgmt
, size_t len
)
2005 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2006 struct ieee80211_local
*local
= sdata
->local
;
2007 struct ieee80211_supported_band
*sband
;
2008 struct sta_info
*sta
;
2010 u16 capab_info
, aid
;
2011 struct ieee802_11_elems elems
;
2012 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2016 /* AssocResp and ReassocResp have identical structure */
2018 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2019 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2021 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2022 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2024 aid
&= ~(BIT(15) | BIT(14));
2026 ifmgd
->broken_ap
= false;
2028 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2029 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2032 ifmgd
->broken_ap
= true;
2035 pos
= mgmt
->u
.assoc_resp
.variable
;
2036 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2038 if (!elems
.supp_rates
) {
2039 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2045 mutex_lock(&sdata
->local
->sta_mtx
);
2047 * station info was already allocated and inserted before
2048 * the association and should be available to us
2050 sta
= sta_info_get(sdata
, cbss
->bssid
);
2051 if (WARN_ON(!sta
)) {
2052 mutex_unlock(&sdata
->local
->sta_mtx
);
2056 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2058 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2059 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2060 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2062 sta
->supports_40mhz
=
2063 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2065 rate_control_rate_init(sta
);
2067 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2068 set_sta_flag(sta
, WLAN_STA_MFP
);
2070 if (elems
.wmm_param
)
2071 set_sta_flag(sta
, WLAN_STA_WME
);
2073 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2075 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2076 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2077 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2080 "failed to move station %pM to desired state\n",
2082 WARN_ON(__sta_info_destroy(sta
));
2083 mutex_unlock(&sdata
->local
->sta_mtx
);
2087 mutex_unlock(&sdata
->local
->sta_mtx
);
2090 * Always handle WMM once after association regardless
2091 * of the first value the AP uses. Setting -1 here has
2092 * that effect because the AP values is an unsigned
2095 ifmgd
->wmm_last_param_set
= -1;
2097 if (elems
.wmm_param
)
2098 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2099 elems
.wmm_param_len
);
2101 ieee80211_set_wmm_default(sdata
, false);
2102 changed
|= BSS_CHANGED_QOS
;
2104 if (elems
.ht_operation
&& elems
.wmm_param
&&
2105 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2106 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2107 cbss
->bssid
, false);
2109 /* set AID and assoc capability,
2110 * ieee80211_set_associated() will tell the driver */
2111 bss_conf
->aid
= aid
;
2112 bss_conf
->assoc_capability
= capab_info
;
2113 ieee80211_set_associated(sdata
, cbss
, changed
);
2116 * If we're using 4-addr mode, let the AP know that we're
2117 * doing so, so that it can create the STA VLAN on its side
2119 if (ifmgd
->use_4addr
)
2120 ieee80211_send_4addr_nullfunc(local
, sdata
);
2123 * Start timer to probe the connection to the AP now.
2124 * Also start the timer that will detect beacon loss.
2126 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2127 ieee80211_sta_reset_beacon_monitor(sdata
);
2132 static enum rx_mgmt_action __must_check
2133 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2134 struct ieee80211_mgmt
*mgmt
, size_t len
,
2135 struct cfg80211_bss
**bss
)
2137 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2138 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2139 u16 capab_info
, status_code
, aid
;
2140 struct ieee802_11_elems elems
;
2144 lockdep_assert_held(&ifmgd
->mtx
);
2147 return RX_MGMT_NONE
;
2148 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2149 return RX_MGMT_NONE
;
2152 * AssocResp and ReassocResp have identical structure, so process both
2153 * of them in this function.
2157 return RX_MGMT_NONE
;
2159 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2160 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2161 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2162 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2165 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2166 reassoc
? "Rea" : "A", mgmt
->sa
,
2167 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2169 pos
= mgmt
->u
.assoc_resp
.variable
;
2170 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2172 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2173 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2174 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2176 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2177 ms
= tu
* 1024 / 1000;
2179 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2181 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2182 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2183 run_again(ifmgd
, assoc_data
->timeout
);
2184 return RX_MGMT_NONE
;
2187 *bss
= assoc_data
->bss
;
2189 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2190 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2191 mgmt
->sa
, status_code
);
2192 ieee80211_destroy_assoc_data(sdata
, false);
2194 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2195 /* oops -- internal error -- send timeout for now */
2196 ieee80211_destroy_assoc_data(sdata
, false);
2197 cfg80211_put_bss(*bss
);
2198 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2200 sdata_info(sdata
, "associated\n");
2203 * destroy assoc_data afterwards, as otherwise an idle
2204 * recalc after assoc_data is NULL but before associated
2205 * is set can cause the interface to go idle
2207 ieee80211_destroy_assoc_data(sdata
, true);
2210 return RX_MGMT_CFG80211_RX_ASSOC
;
2212 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2213 struct ieee80211_mgmt
*mgmt
,
2215 struct ieee80211_rx_status
*rx_status
,
2216 struct ieee802_11_elems
*elems
,
2219 struct ieee80211_local
*local
= sdata
->local
;
2221 struct ieee80211_bss
*bss
;
2222 struct ieee80211_channel
*channel
;
2223 bool need_ps
= false;
2225 if (sdata
->u
.mgd
.associated
&&
2226 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2227 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2228 /* not previously set so we may need to recalc */
2229 need_ps
= !bss
->dtim_period
;
2232 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2233 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2236 freq
= rx_status
->freq
;
2238 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2240 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2243 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2246 ieee80211_rx_bss_put(local
, bss
);
2248 if (!sdata
->u
.mgd
.associated
)
2252 mutex_lock(&local
->iflist_mtx
);
2253 ieee80211_recalc_ps(local
, -1);
2254 mutex_unlock(&local
->iflist_mtx
);
2257 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2258 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2260 struct ieee80211_channel_sw_ie
*sw_elem
=
2261 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2262 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2263 bss
, rx_status
->mactime
);
2268 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2269 struct sk_buff
*skb
)
2271 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2272 struct ieee80211_if_managed
*ifmgd
;
2273 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2274 size_t baselen
, len
= skb
->len
;
2275 struct ieee802_11_elems elems
;
2277 ifmgd
= &sdata
->u
.mgd
;
2279 ASSERT_MGD_MTX(ifmgd
);
2281 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2282 return; /* ignore ProbeResp to foreign address */
2284 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2288 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2291 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2293 if (ifmgd
->associated
&&
2294 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2295 ieee80211_reset_ap_probe(sdata
);
2297 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2298 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2299 /* got probe response, continue with auth */
2300 sdata_info(sdata
, "direct probe responded\n");
2301 ifmgd
->auth_data
->tries
= 0;
2302 ifmgd
->auth_data
->timeout
= jiffies
;
2303 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2308 * This is the canonical list of information elements we care about,
2309 * the filter code also gives us all changes to the Microsoft OUI
2310 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2312 * We implement beacon filtering in software since that means we can
2313 * avoid processing the frame here and in cfg80211, and userspace
2314 * will not be able to tell whether the hardware supports it or not.
2316 * XXX: This list needs to be dynamic -- userspace needs to be able to
2317 * add items it requires. It also needs to be able to tell us to
2318 * look out for other vendor IEs.
2320 static const u64 care_about_ies
=
2321 (1ULL << WLAN_EID_COUNTRY
) |
2322 (1ULL << WLAN_EID_ERP_INFO
) |
2323 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2324 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2325 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2326 (1ULL << WLAN_EID_HT_OPERATION
);
2328 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2329 struct ieee80211_mgmt
*mgmt
,
2331 struct ieee80211_rx_status
*rx_status
)
2333 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2334 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2336 struct ieee802_11_elems elems
;
2337 struct ieee80211_local
*local
= sdata
->local
;
2339 bool erp_valid
, directed_tim
= false;
2344 lockdep_assert_held(&ifmgd
->mtx
);
2346 /* Process beacon from the current BSS */
2347 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2351 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2354 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2355 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2356 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2357 len
- baselen
, &elems
);
2359 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2361 ifmgd
->assoc_data
->have_beacon
= true;
2362 ifmgd
->assoc_data
->sent_assoc
= false;
2363 /* continue assoc process */
2364 ifmgd
->assoc_data
->timeout
= jiffies
;
2365 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2369 if (!ifmgd
->associated
||
2370 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2372 bssid
= ifmgd
->associated
->bssid
;
2374 /* Track average RSSI from the Beacon frames of the current AP */
2375 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2376 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2377 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2378 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2379 ifmgd
->last_cqm_event_signal
= 0;
2380 ifmgd
->count_beacon_signal
= 1;
2381 ifmgd
->last_ave_beacon_signal
= 0;
2383 ifmgd
->ave_beacon_signal
=
2384 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2385 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2386 ifmgd
->ave_beacon_signal
) / 16;
2387 ifmgd
->count_beacon_signal
++;
2390 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2391 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2392 int sig
= ifmgd
->ave_beacon_signal
;
2393 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2396 * if signal crosses either of the boundaries, invoke callback
2397 * with appropriate parameters
2399 if (sig
> ifmgd
->rssi_max_thold
&&
2400 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2401 ifmgd
->last_ave_beacon_signal
= sig
;
2402 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2403 } else if (sig
< ifmgd
->rssi_min_thold
&&
2404 (last_sig
>= ifmgd
->rssi_max_thold
||
2406 ifmgd
->last_ave_beacon_signal
= sig
;
2407 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2411 if (bss_conf
->cqm_rssi_thold
&&
2412 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2413 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2414 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2415 int last_event
= ifmgd
->last_cqm_event_signal
;
2416 int thold
= bss_conf
->cqm_rssi_thold
;
2417 int hyst
= bss_conf
->cqm_rssi_hyst
;
2419 (last_event
== 0 || sig
< last_event
- hyst
)) {
2420 ifmgd
->last_cqm_event_signal
= sig
;
2421 ieee80211_cqm_rssi_notify(
2423 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2425 } else if (sig
> thold
&&
2426 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2427 ifmgd
->last_cqm_event_signal
= sig
;
2428 ieee80211_cqm_rssi_notify(
2430 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2435 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2436 mlme_dbg_ratelimited(sdata
,
2437 "cancelling probereq poll due to a received beacon\n");
2438 mutex_lock(&local
->mtx
);
2439 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2440 ieee80211_run_deferred_scan(local
);
2441 mutex_unlock(&local
->mtx
);
2443 mutex_lock(&local
->iflist_mtx
);
2444 ieee80211_recalc_ps(local
, -1);
2445 mutex_unlock(&local
->iflist_mtx
);
2449 * Push the beacon loss detection into the future since
2450 * we are processing a beacon from the AP just now.
2452 ieee80211_sta_reset_beacon_monitor(sdata
);
2454 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2455 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2456 len
- baselen
, &elems
,
2457 care_about_ies
, ncrc
);
2459 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2460 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2463 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2465 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2466 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2467 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2468 ieee80211_hw_config(local
,
2469 IEEE80211_CONF_CHANGE_PS
);
2471 ieee80211_send_nullfunc(local
, sdata
, 0);
2472 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2473 local
->pspolling
= true;
2476 * Here is assumed that the driver will be
2477 * able to send ps-poll frame and receive a
2478 * response even though power save mode is
2479 * enabled, but some drivers might require
2480 * to disable power save here. This needs
2481 * to be investigated.
2483 ieee80211_send_pspoll(local
, sdata
);
2488 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2490 ifmgd
->beacon_crc
= ncrc
;
2491 ifmgd
->beacon_crc_valid
= true;
2493 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2496 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2497 elems
.wmm_param_len
))
2498 changed
|= BSS_CHANGED_QOS
;
2500 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2502 erp_value
= elems
.erp_info
[0];
2506 changed
|= ieee80211_handle_bss_capability(sdata
,
2507 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2508 erp_valid
, erp_value
);
2511 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2512 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2513 struct ieee80211_supported_band
*sband
;
2515 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2517 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2521 /* Note: country IE parsing is done for us by cfg80211 */
2522 if (elems
.country_elem
) {
2523 /* TODO: IBSS also needs this */
2524 if (elems
.pwr_constr_elem
)
2525 ieee80211_handle_pwr_constr(sdata
,
2526 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2527 elems
.pwr_constr_elem
,
2528 elems
.pwr_constr_elem_len
);
2531 ieee80211_bss_info_change_notify(sdata
, changed
);
2534 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2535 struct sk_buff
*skb
)
2537 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2538 struct ieee80211_rx_status
*rx_status
;
2539 struct ieee80211_mgmt
*mgmt
;
2540 struct cfg80211_bss
*bss
= NULL
;
2541 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2544 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2545 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2546 fc
= le16_to_cpu(mgmt
->frame_control
);
2548 mutex_lock(&ifmgd
->mtx
);
2550 switch (fc
& IEEE80211_FCTL_STYPE
) {
2551 case IEEE80211_STYPE_BEACON
:
2552 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2554 case IEEE80211_STYPE_PROBE_RESP
:
2555 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2557 case IEEE80211_STYPE_AUTH
:
2558 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2560 case IEEE80211_STYPE_DEAUTH
:
2561 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2563 case IEEE80211_STYPE_DISASSOC
:
2564 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2566 case IEEE80211_STYPE_ASSOC_RESP
:
2567 case IEEE80211_STYPE_REASSOC_RESP
:
2568 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2570 case IEEE80211_STYPE_ACTION
:
2571 switch (mgmt
->u
.action
.category
) {
2572 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2573 ieee80211_sta_process_chanswitch(sdata
,
2574 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2575 (void *)ifmgd
->associated
->priv
,
2576 rx_status
->mactime
);
2580 mutex_unlock(&ifmgd
->mtx
);
2586 case RX_MGMT_CFG80211_DEAUTH
:
2587 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2589 case RX_MGMT_CFG80211_DISASSOC
:
2590 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2592 case RX_MGMT_CFG80211_RX_AUTH
:
2593 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2595 case RX_MGMT_CFG80211_RX_ASSOC
:
2596 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2598 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2599 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2602 WARN(1, "unexpected: %d", rma
);
2606 static void ieee80211_sta_timer(unsigned long data
)
2608 struct ieee80211_sub_if_data
*sdata
=
2609 (struct ieee80211_sub_if_data
*) data
;
2610 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2611 struct ieee80211_local
*local
= sdata
->local
;
2613 if (local
->quiescing
) {
2614 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2618 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2621 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2622 u8
*bssid
, u8 reason
)
2624 struct ieee80211_local
*local
= sdata
->local
;
2625 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2626 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2628 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2630 mutex_unlock(&ifmgd
->mtx
);
2633 * must be outside lock due to cfg80211,
2634 * but that's not a problem.
2636 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2638 mutex_lock(&local
->mtx
);
2639 ieee80211_recalc_idle(local
);
2640 mutex_unlock(&local
->mtx
);
2642 mutex_lock(&ifmgd
->mtx
);
2645 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2647 struct ieee80211_local
*local
= sdata
->local
;
2648 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2649 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2651 lockdep_assert_held(&ifmgd
->mtx
);
2653 if (WARN_ON_ONCE(!auth_data
))
2658 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2659 sdata_info(sdata
, "authentication with %pM timed out\n",
2660 auth_data
->bss
->bssid
);
2663 * Most likely AP is not in the range so remove the
2664 * bss struct for that AP.
2666 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2671 drv_mgd_prepare_tx(local
, sdata
);
2673 if (auth_data
->bss
->proberesp_ies
) {
2674 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2675 auth_data
->bss
->bssid
, auth_data
->tries
,
2676 IEEE80211_AUTH_MAX_TRIES
);
2678 auth_data
->expected_transaction
= 2;
2679 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2680 auth_data
->ie
, auth_data
->ie_len
,
2681 auth_data
->bss
->bssid
,
2682 auth_data
->bss
->bssid
, NULL
, 0, 0);
2686 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2687 auth_data
->bss
->bssid
, auth_data
->tries
,
2688 IEEE80211_AUTH_MAX_TRIES
);
2690 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2694 * Direct probe is sent to broadcast address as some APs
2695 * will not answer to direct packet in unassociated state.
2697 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2698 NULL
, 0, (u32
) -1, true, false);
2701 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2702 run_again(ifmgd
, auth_data
->timeout
);
2707 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2709 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2710 struct ieee80211_local
*local
= sdata
->local
;
2712 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2714 assoc_data
->tries
++;
2715 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2716 sdata_info(sdata
, "association with %pM timed out\n",
2717 assoc_data
->bss
->bssid
);
2720 * Most likely AP is not in the range so remove the
2721 * bss struct for that AP.
2723 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2728 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2729 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2730 IEEE80211_ASSOC_MAX_TRIES
);
2731 ieee80211_send_assoc(sdata
);
2733 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2734 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2739 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2741 struct ieee80211_local
*local
= sdata
->local
;
2742 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2744 mutex_lock(&ifmgd
->mtx
);
2746 if (ifmgd
->auth_data
&&
2747 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2748 if (ifmgd
->auth_data
->done
) {
2750 * ok ... we waited for assoc but userspace didn't,
2751 * so let's just kill the auth data
2753 ieee80211_destroy_auth_data(sdata
, false);
2754 } else if (ieee80211_probe_auth(sdata
)) {
2757 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2759 ieee80211_destroy_auth_data(sdata
, false);
2761 mutex_unlock(&ifmgd
->mtx
);
2762 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2763 mutex_lock(&ifmgd
->mtx
);
2765 } else if (ifmgd
->auth_data
)
2766 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2768 if (ifmgd
->assoc_data
&&
2769 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2770 if (!ifmgd
->assoc_data
->have_beacon
||
2771 ieee80211_do_assoc(sdata
)) {
2774 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2776 ieee80211_destroy_assoc_data(sdata
, false);
2778 mutex_unlock(&ifmgd
->mtx
);
2779 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2780 mutex_lock(&ifmgd
->mtx
);
2782 } else if (ifmgd
->assoc_data
)
2783 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2785 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2786 IEEE80211_STA_CONNECTION_POLL
) &&
2787 ifmgd
->associated
) {
2791 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2793 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2794 max_tries
= max_nullfunc_tries
;
2796 max_tries
= max_probe_tries
;
2798 /* ACK received for nullfunc probing frame */
2799 if (!ifmgd
->probe_send_count
)
2800 ieee80211_reset_ap_probe(sdata
);
2801 else if (ifmgd
->nullfunc_failed
) {
2802 if (ifmgd
->probe_send_count
< max_tries
) {
2804 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2805 bssid
, ifmgd
->probe_send_count
,
2807 ieee80211_mgd_probe_ap_send(sdata
);
2810 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2812 ieee80211_sta_connection_lost(sdata
, bssid
,
2813 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2815 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2816 run_again(ifmgd
, ifmgd
->probe_timeout
);
2817 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2819 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2820 bssid
, probe_wait_ms
);
2821 ieee80211_sta_connection_lost(sdata
, bssid
,
2822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2823 } else if (ifmgd
->probe_send_count
< max_tries
) {
2825 "No probe response from AP %pM after %dms, try %d/%i\n",
2826 bssid
, probe_wait_ms
,
2827 ifmgd
->probe_send_count
, max_tries
);
2828 ieee80211_mgd_probe_ap_send(sdata
);
2831 * We actually lost the connection ... or did we?
2834 wiphy_debug(local
->hw
.wiphy
,
2835 "%s: No probe response from AP %pM"
2836 " after %dms, disconnecting.\n",
2838 bssid
, probe_wait_ms
);
2840 ieee80211_sta_connection_lost(sdata
, bssid
,
2841 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2845 mutex_unlock(&ifmgd
->mtx
);
2847 mutex_lock(&local
->mtx
);
2848 ieee80211_recalc_idle(local
);
2849 mutex_unlock(&local
->mtx
);
2852 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2854 struct ieee80211_sub_if_data
*sdata
=
2855 (struct ieee80211_sub_if_data
*) data
;
2856 struct ieee80211_local
*local
= sdata
->local
;
2858 if (local
->quiescing
)
2861 ieee80211_queue_work(&sdata
->local
->hw
,
2862 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2865 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2867 struct ieee80211_sub_if_data
*sdata
=
2868 (struct ieee80211_sub_if_data
*) data
;
2869 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2870 struct ieee80211_local
*local
= sdata
->local
;
2872 if (local
->quiescing
)
2875 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2878 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2880 struct ieee80211_sub_if_data
*sdata
=
2881 container_of(work
, struct ieee80211_sub_if_data
,
2882 u
.mgd
.monitor_work
);
2884 ieee80211_mgd_probe_ap(sdata
, false);
2887 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2891 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2892 __ieee80211_stop_poll(sdata
);
2894 /* let's probe the connection once */
2895 flags
= sdata
->local
->hw
.flags
;
2896 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2897 ieee80211_queue_work(&sdata
->local
->hw
,
2898 &sdata
->u
.mgd
.monitor_work
);
2899 /* and do all the other regular work too */
2900 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2905 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2907 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2910 * we need to use atomic bitops for the running bits
2911 * only because both timers might fire at the same
2912 * time -- the code here is properly synchronised.
2915 cancel_work_sync(&ifmgd
->request_smps_work
);
2917 cancel_work_sync(&ifmgd
->monitor_work
);
2918 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2919 if (del_timer_sync(&ifmgd
->timer
))
2920 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2922 cancel_work_sync(&ifmgd
->chswitch_work
);
2923 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2924 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2926 /* these will just be re-established on connection */
2927 del_timer_sync(&ifmgd
->conn_mon_timer
);
2928 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2931 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2933 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2935 if (!ifmgd
->associated
)
2938 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2939 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2940 mutex_lock(&ifmgd
->mtx
);
2941 if (ifmgd
->associated
) {
2943 "driver requested disconnect after resume\n");
2944 ieee80211_sta_connection_lost(sdata
,
2945 ifmgd
->associated
->bssid
,
2946 WLAN_REASON_UNSPECIFIED
);
2947 mutex_unlock(&ifmgd
->mtx
);
2950 mutex_unlock(&ifmgd
->mtx
);
2953 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2954 add_timer(&ifmgd
->timer
);
2955 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2956 add_timer(&ifmgd
->chswitch_timer
);
2957 ieee80211_sta_reset_beacon_monitor(sdata
);
2959 mutex_lock(&sdata
->local
->mtx
);
2960 ieee80211_restart_sta_timer(sdata
);
2961 mutex_unlock(&sdata
->local
->mtx
);
2965 /* interface setup */
2966 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2968 struct ieee80211_if_managed
*ifmgd
;
2970 ifmgd
= &sdata
->u
.mgd
;
2971 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2972 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2973 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2974 ieee80211_beacon_connection_loss_work
);
2975 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2976 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2977 (unsigned long) sdata
);
2978 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2979 (unsigned long) sdata
);
2980 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2981 (unsigned long) sdata
);
2982 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2983 (unsigned long) sdata
);
2986 ifmgd
->powersave
= sdata
->wdev
.ps
;
2987 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2988 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2990 mutex_init(&ifmgd
->mtx
);
2992 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2993 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2995 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2998 /* scan finished notification */
2999 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3001 struct ieee80211_sub_if_data
*sdata
;
3003 /* Restart STA timers */
3005 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3006 ieee80211_restart_sta_timer(sdata
);
3010 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3011 unsigned long data
, void *dummy
)
3013 s32 latency_usec
= (s32
) data
;
3014 struct ieee80211_local
*local
=
3015 container_of(nb
, struct ieee80211_local
,
3016 network_latency_notifier
);
3018 mutex_lock(&local
->iflist_mtx
);
3019 ieee80211_recalc_ps(local
, latency_usec
);
3020 mutex_unlock(&local
->iflist_mtx
);
3025 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3026 struct cfg80211_bss
*cbss
, bool assoc
)
3028 struct ieee80211_local
*local
= sdata
->local
;
3029 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3030 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3031 struct sta_info
*sta
= NULL
;
3032 bool have_sta
= false;
3035 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3036 const u8
*ht_oper_ie
;
3037 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3038 struct ieee80211_supported_band
*sband
;
3040 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3045 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3050 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3055 mutex_lock(&local
->mtx
);
3056 ieee80211_recalc_idle(sdata
->local
);
3057 mutex_unlock(&local
->mtx
);
3059 /* switch to the right channel */
3060 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3062 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3064 if (sband
->ht_cap
.ht_supported
) {
3065 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3066 cbss
->information_elements
,
3067 cbss
->len_information_elements
);
3068 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3069 ht_oper
= (void *)(ht_oper_ie
+ 2);
3073 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3074 cbss
->channel
->band
);
3075 /* check that channel matches the right operating channel */
3076 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3078 * It's possible that some APs are confused here;
3079 * Netgear WNDR3700 sometimes reports 4 higher than
3080 * the actual channel in association responses, but
3081 * since we look at probe response/beacon data here
3085 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3086 cbss
->channel
->center_freq
,
3087 ht_cfreq
, ht_oper
->primary_chan
,
3088 cbss
->channel
->band
);
3094 channel_type
= NL80211_CHAN_HT20
;
3096 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3097 switch (ht_oper
->ht_param
&
3098 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3099 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3100 channel_type
= NL80211_CHAN_HT40PLUS
;
3102 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3103 channel_type
= NL80211_CHAN_HT40MINUS
;
3109 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3110 /* can only fail due to HT40+/- mismatch */
3111 channel_type
= NL80211_CHAN_HT20
;
3113 "disabling 40 MHz due to multi-vif mismatch\n");
3114 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3115 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3119 local
->oper_channel
= cbss
->channel
;
3120 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3123 u32 rates
= 0, basic_rates
= 0;
3124 bool have_higher_than_11mbit
;
3125 int min_rate
= INT_MAX
, min_rate_index
= -1;
3127 ieee80211_get_rates(sband
, bss
->supp_rates
,
3128 bss
->supp_rates_len
,
3129 &rates
, &basic_rates
,
3130 &have_higher_than_11mbit
,
3131 &min_rate
, &min_rate_index
);
3134 * This used to be a workaround for basic rates missing
3135 * in the association response frame. Now that we no
3136 * longer use the basic rates from there, it probably
3137 * doesn't happen any more, but keep the workaround so
3138 * in case some *other* APs are buggy in different ways
3139 * we can connect -- with a warning.
3141 if (!basic_rates
&& min_rate_index
>= 0) {
3143 "No basic rates, using min rate instead\n");
3144 basic_rates
= BIT(min_rate_index
);
3147 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3148 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3150 /* cf. IEEE 802.11 9.2.12 */
3151 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3152 have_higher_than_11mbit
)
3153 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3155 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3157 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3159 /* set timing information */
3160 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3161 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3162 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3164 /* tell driver about BSSID, basic rates and timing */
3165 ieee80211_bss_info_change_notify(sdata
,
3166 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3167 BSS_CHANGED_BEACON_INT
);
3170 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3172 err
= sta_info_insert(sta
);
3176 "failed to insert STA entry for the AP (error %d)\n",
3181 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3187 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3188 struct cfg80211_auth_request
*req
)
3190 struct ieee80211_local
*local
= sdata
->local
;
3191 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3192 struct ieee80211_mgd_auth_data
*auth_data
;
3196 /* prepare auth data structure */
3198 switch (req
->auth_type
) {
3199 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3200 auth_alg
= WLAN_AUTH_OPEN
;
3202 case NL80211_AUTHTYPE_SHARED_KEY
:
3203 if (IS_ERR(local
->wep_tx_tfm
))
3205 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3207 case NL80211_AUTHTYPE_FT
:
3208 auth_alg
= WLAN_AUTH_FT
;
3210 case NL80211_AUTHTYPE_NETWORK_EAP
:
3211 auth_alg
= WLAN_AUTH_LEAP
;
3217 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3221 auth_data
->bss
= req
->bss
;
3223 if (req
->ie
&& req
->ie_len
) {
3224 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3225 auth_data
->ie_len
= req
->ie_len
;
3228 if (req
->key
&& req
->key_len
) {
3229 auth_data
->key_len
= req
->key_len
;
3230 auth_data
->key_idx
= req
->key_idx
;
3231 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3234 auth_data
->algorithm
= auth_alg
;
3236 /* try to authenticate/probe */
3238 mutex_lock(&ifmgd
->mtx
);
3240 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3241 ifmgd
->assoc_data
) {
3246 if (ifmgd
->auth_data
)
3247 ieee80211_destroy_auth_data(sdata
, false);
3249 /* prep auth_data so we don't go into idle on disassoc */
3250 ifmgd
->auth_data
= auth_data
;
3252 if (ifmgd
->associated
)
3253 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3255 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3257 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3261 err
= ieee80211_probe_auth(sdata
);
3263 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3267 /* hold our own reference */
3268 cfg80211_ref_bss(auth_data
->bss
);
3273 ifmgd
->auth_data
= NULL
;
3277 mutex_unlock(&ifmgd
->mtx
);
3282 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3283 struct cfg80211_assoc_request
*req
)
3285 struct ieee80211_local
*local
= sdata
->local
;
3286 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3287 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3288 struct ieee80211_mgd_assoc_data
*assoc_data
;
3289 struct ieee80211_supported_band
*sband
;
3290 const u8
*ssidie
, *ht_ie
;
3293 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3297 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3301 mutex_lock(&ifmgd
->mtx
);
3303 if (ifmgd
->associated
)
3304 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3306 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3311 if (ifmgd
->assoc_data
) {
3316 if (ifmgd
->auth_data
) {
3319 /* keep sta info, bssid if matching */
3320 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3321 ieee80211_destroy_auth_data(sdata
, match
);
3324 /* prepare assoc data */
3326 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3327 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3328 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_VHT
;
3330 ifmgd
->beacon_crc_valid
= false;
3333 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3334 * We still associate in non-HT mode (11a/b/g) if any one of these
3335 * ciphers is configured as pairwise.
3336 * We can set this to true for non-11n hardware, that'll be checked
3337 * separately along with the peer capabilities.
3339 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3340 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3341 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3342 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3343 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3344 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3345 netdev_info(sdata
->dev
,
3346 "disabling HT/VHT due to WEP/TKIP use\n");
3350 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3351 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3352 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3355 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3356 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3357 if (!sband
->ht_cap
.ht_supported
||
3358 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3359 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3360 netdev_info(sdata
->dev
,
3361 "disabling HT as WMM/QoS is not supported\n");
3364 /* disable VHT if we don't support it or the AP doesn't use WMM */
3365 if (!sband
->vht_cap
.vht_supported
||
3366 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3367 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3368 netdev_info(sdata
->dev
,
3369 "disabling VHT as WMM/QoS is not supported\n");
3372 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3373 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3374 sizeof(ifmgd
->ht_capa_mask
));
3376 if (req
->ie
&& req
->ie_len
) {
3377 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3378 assoc_data
->ie_len
= req
->ie_len
;
3381 assoc_data
->bss
= req
->bss
;
3383 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3384 if (ifmgd
->powersave
)
3385 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3387 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3389 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3391 assoc_data
->capability
= req
->bss
->capability
;
3392 assoc_data
->wmm
= bss
->wmm_used
&&
3393 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3394 assoc_data
->supp_rates
= bss
->supp_rates
;
3395 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3397 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3398 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3399 assoc_data
->ap_ht_param
=
3400 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3402 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3404 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3405 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3406 assoc_data
->uapsd
= true;
3407 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3409 assoc_data
->uapsd
= false;
3410 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3413 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3414 assoc_data
->ssid_len
= ssidie
[1];
3416 if (req
->prev_bssid
)
3417 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3420 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3421 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3423 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3424 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3427 if (req
->crypto
.control_port
)
3428 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3430 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3432 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3433 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3435 /* kick off associate process */
3437 ifmgd
->assoc_data
= assoc_data
;
3439 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3443 if (!bss
->dtim_period
&&
3444 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3446 * Wait up to one beacon interval ...
3447 * should this be more if we miss one?
3449 sdata_info(sdata
, "waiting for beacon from %pM\n",
3451 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3453 assoc_data
->have_beacon
= true;
3454 assoc_data
->sent_assoc
= false;
3455 assoc_data
->timeout
= jiffies
;
3457 run_again(ifmgd
, assoc_data
->timeout
);
3459 if (bss
->corrupt_data
) {
3460 char *corrupt_type
= "data";
3461 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3462 if (bss
->corrupt_data
&
3463 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3464 corrupt_type
= "beacon and probe response";
3466 corrupt_type
= "beacon";
3467 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3468 corrupt_type
= "probe response";
3469 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3476 ifmgd
->assoc_data
= NULL
;
3480 mutex_unlock(&ifmgd
->mtx
);
3485 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3486 struct cfg80211_deauth_request
*req
)
3488 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3489 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3491 mutex_lock(&ifmgd
->mtx
);
3493 if (ifmgd
->auth_data
) {
3494 ieee80211_destroy_auth_data(sdata
, false);
3495 mutex_unlock(&ifmgd
->mtx
);
3500 "deauthenticating from %pM by local choice (reason=%d)\n",
3501 req
->bssid
, req
->reason_code
);
3503 if (ifmgd
->associated
&&
3504 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3505 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3506 req
->reason_code
, true, frame_buf
);
3508 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3509 IEEE80211_STYPE_DEAUTH
,
3510 req
->reason_code
, true,
3512 mutex_unlock(&ifmgd
->mtx
);
3514 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3516 mutex_lock(&sdata
->local
->mtx
);
3517 ieee80211_recalc_idle(sdata
->local
);
3518 mutex_unlock(&sdata
->local
->mtx
);
3523 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3524 struct cfg80211_disassoc_request
*req
)
3526 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3528 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3530 mutex_lock(&ifmgd
->mtx
);
3533 * cfg80211 should catch this ... but it's racy since
3534 * we can receive a disassoc frame, process it, hand it
3535 * to cfg80211 while that's in a locked section already
3536 * trying to tell us that the user wants to disconnect.
3538 if (ifmgd
->associated
!= req
->bss
) {
3539 mutex_unlock(&ifmgd
->mtx
);
3544 "disassociating from %pM by local choice (reason=%d)\n",
3545 req
->bss
->bssid
, req
->reason_code
);
3547 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3548 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3549 req
->reason_code
, !req
->local_state_change
,
3551 mutex_unlock(&ifmgd
->mtx
);
3553 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3555 mutex_lock(&sdata
->local
->mtx
);
3556 ieee80211_recalc_idle(sdata
->local
);
3557 mutex_unlock(&sdata
->local
->mtx
);
3562 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3564 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3566 mutex_lock(&ifmgd
->mtx
);
3567 if (ifmgd
->assoc_data
)
3568 ieee80211_destroy_assoc_data(sdata
, false);
3569 if (ifmgd
->auth_data
)
3570 ieee80211_destroy_auth_data(sdata
, false);
3571 del_timer_sync(&ifmgd
->timer
);
3572 mutex_unlock(&ifmgd
->mtx
);
3575 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3576 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3579 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3581 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3583 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3585 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);