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_send_assoc(struct ieee80211_sub_if_data
*sdata
)
331 struct ieee80211_local
*local
= sdata
->local
;
332 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
333 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
335 struct ieee80211_mgmt
*mgmt
;
337 size_t offset
= 0, noffset
;
338 int i
, count
, rates_len
, supp_rates_len
;
340 struct ieee80211_supported_band
*sband
;
343 lockdep_assert_held(&ifmgd
->mtx
);
345 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
347 if (assoc_data
->supp_rates_len
) {
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
354 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
355 assoc_data
->supp_rates_len
,
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
364 rates_len
= sband
->n_bitrates
;
367 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
368 sizeof(*mgmt
) + /* bit too much but doesn't matter */
369 2 + assoc_data
->ssid_len
+ /* SSID */
370 4 + rates_len
+ /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband
->n_channels
+ /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
374 assoc_data
->ie_len
+ /* extra IEs */
380 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
382 capab
= WLAN_CAPABILITY_ESS
;
384 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
385 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
386 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
387 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
388 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
391 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
392 capab
|= WLAN_CAPABILITY_PRIVACY
;
394 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
395 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
396 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
398 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
400 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
401 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
402 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
404 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
406 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
407 IEEE80211_STYPE_REASSOC_REQ
);
408 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
409 mgmt
->u
.reassoc_req
.listen_interval
=
410 cpu_to_le16(local
->hw
.conf
.listen_interval
);
411 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
415 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
416 IEEE80211_STYPE_ASSOC_REQ
);
417 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
418 mgmt
->u
.assoc_req
.listen_interval
=
419 cpu_to_le16(local
->hw
.conf
.listen_interval
);
423 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
424 *pos
++ = WLAN_EID_SSID
;
425 *pos
++ = assoc_data
->ssid_len
;
426 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
428 /* add all rates which were marked to be used above */
429 supp_rates_len
= rates_len
;
430 if (supp_rates_len
> 8)
433 pos
= skb_put(skb
, supp_rates_len
+ 2);
434 *pos
++ = WLAN_EID_SUPP_RATES
;
435 *pos
++ = supp_rates_len
;
438 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
439 if (BIT(i
) & rates
) {
440 int rate
= sband
->bitrates
[i
].bitrate
;
441 *pos
++ = (u8
) (rate
/ 5);
447 if (rates_len
> count
) {
448 pos
= skb_put(skb
, rates_len
- count
+ 2);
449 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
450 *pos
++ = rates_len
- count
;
452 for (i
++; i
< sband
->n_bitrates
; i
++) {
453 if (BIT(i
) & rates
) {
454 int rate
= sband
->bitrates
[i
].bitrate
;
455 *pos
++ = (u8
) (rate
/ 5);
460 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
461 /* 1. power capabilities */
462 pos
= skb_put(skb
, 4);
463 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
465 *pos
++ = 0; /* min tx power */
466 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
471 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
472 *pos
++ = 2 * sband
->n_channels
;
473 for (i
= 0; i
< sband
->n_channels
; i
++) {
474 *pos
++ = ieee80211_frequency_to_channel(
475 sband
->channels
[i
].center_freq
);
476 *pos
++ = 1; /* one channel in the subband*/
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
482 static const u8 before_ht
[] = {
485 WLAN_EID_EXT_SUPP_RATES
,
486 WLAN_EID_PWR_CAPABILITY
,
487 WLAN_EID_SUPPORTED_CHANNELS
,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
491 WLAN_EID_MOBILITY_DOMAIN
,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
494 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
495 before_ht
, ARRAY_SIZE(before_ht
),
497 pos
= skb_put(skb
, noffset
- offset
);
498 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
502 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
503 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
504 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
508 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
511 pos
= skb_put(skb
, noffset
- offset
);
512 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
516 if (assoc_data
->wmm
) {
517 if (assoc_data
->uapsd
) {
518 qos_info
= ifmgd
->uapsd_queues
;
519 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
525 pos
= skb_put(skb
, 9);
526 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
527 *pos
++ = 7; /* len */
528 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
531 *pos
++ = 2; /* WME */
532 *pos
++ = 0; /* WME info */
533 *pos
++ = 1; /* WME ver */
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
539 noffset
= assoc_data
->ie_len
;
540 pos
= skb_put(skb
, noffset
- offset
);
541 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
544 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
545 ieee80211_tx_skb(sdata
, skb
);
548 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
549 const u8
*bssid
, u16 stype
,
550 u16 reason
, bool send_frame
,
553 struct ieee80211_local
*local
= sdata
->local
;
554 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
556 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
559 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
560 mgmt
->duration
= 0; /* initialize only */
561 mgmt
->seq_ctrl
= 0; /* initialize only */
562 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
563 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
564 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
565 /* u.deauth.reason_code == u.disassoc.reason_code */
566 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
569 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
570 DEAUTH_DISASSOC_LEN
);
574 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
577 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
578 mgmt
, DEAUTH_DISASSOC_LEN
);
580 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
581 IEEE80211_SKB_CB(skb
)->flags
|=
582 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
583 ieee80211_tx_skb(sdata
, skb
);
587 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
588 struct ieee80211_sub_if_data
*sdata
)
590 struct ieee80211_pspoll
*pspoll
;
593 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
597 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
598 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
600 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
601 ieee80211_tx_skb(sdata
, skb
);
604 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
605 struct ieee80211_sub_if_data
*sdata
,
609 struct ieee80211_hdr_3addr
*nullfunc
;
610 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
612 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
616 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
618 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
620 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
621 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
622 IEEE80211_STA_CONNECTION_POLL
))
623 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
625 ieee80211_tx_skb(sdata
, skb
);
628 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
629 struct ieee80211_sub_if_data
*sdata
)
632 struct ieee80211_hdr
*nullfunc
;
635 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
638 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
642 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
644 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
645 memset(nullfunc
, 0, 30);
646 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
647 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
648 nullfunc
->frame_control
= fc
;
649 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
650 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
651 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
652 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
654 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
655 ieee80211_tx_skb(sdata
, skb
);
658 /* spectrum management related things */
659 static void ieee80211_chswitch_work(struct work_struct
*work
)
661 struct ieee80211_sub_if_data
*sdata
=
662 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
663 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
665 if (!ieee80211_sdata_running(sdata
))
668 mutex_lock(&ifmgd
->mtx
);
669 if (!ifmgd
->associated
)
672 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
673 if (!sdata
->local
->ops
->channel_switch
) {
674 /* call "hw_config" only if doing sw channel switch */
675 ieee80211_hw_config(sdata
->local
,
676 IEEE80211_CONF_CHANGE_CHANNEL
);
678 /* update the device channel directly */
679 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
682 /* XXX: shouldn't really modify cfg80211-owned data! */
683 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
685 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
686 IEEE80211_QUEUE_STOP_REASON_CSA
);
688 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
689 mutex_unlock(&ifmgd
->mtx
);
692 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
694 struct ieee80211_sub_if_data
*sdata
;
695 struct ieee80211_if_managed
*ifmgd
;
697 sdata
= vif_to_sdata(vif
);
698 ifmgd
= &sdata
->u
.mgd
;
700 trace_api_chswitch_done(sdata
, success
);
703 * If the channel switch was not successful, stay
704 * around on the old channel. We currently lack
705 * good handling of this situation, possibly we
706 * should just drop the association.
708 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
711 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
713 EXPORT_SYMBOL(ieee80211_chswitch_done
);
715 static void ieee80211_chswitch_timer(unsigned long data
)
717 struct ieee80211_sub_if_data
*sdata
=
718 (struct ieee80211_sub_if_data
*) data
;
719 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
721 if (sdata
->local
->quiescing
) {
722 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
726 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
729 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
730 struct ieee80211_channel_sw_ie
*sw_elem
,
731 struct ieee80211_bss
*bss
,
734 struct cfg80211_bss
*cbss
=
735 container_of((void *)bss
, struct cfg80211_bss
, priv
);
736 struct ieee80211_channel
*new_ch
;
737 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
738 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
739 cbss
->channel
->band
);
741 ASSERT_MGD_MTX(ifmgd
);
743 if (!ifmgd
->associated
)
746 if (sdata
->local
->scanning
)
749 /* Disregard subsequent beacons if we are already running a timer
752 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
755 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
756 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
759 sdata
->local
->csa_channel
= new_ch
;
761 if (sdata
->local
->ops
->channel_switch
) {
762 /* use driver's channel switch callback */
763 struct ieee80211_channel_switch ch_switch
;
764 memset(&ch_switch
, 0, sizeof(ch_switch
));
765 ch_switch
.timestamp
= timestamp
;
767 ch_switch
.block_tx
= true;
768 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
769 IEEE80211_QUEUE_STOP_REASON_CSA
);
771 ch_switch
.channel
= new_ch
;
772 ch_switch
.count
= sw_elem
->count
;
773 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
774 drv_channel_switch(sdata
->local
, &ch_switch
);
778 /* channel switch handled in software */
779 if (sw_elem
->count
<= 1) {
780 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
783 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
784 IEEE80211_QUEUE_STOP_REASON_CSA
);
785 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
786 mod_timer(&ifmgd
->chswitch_timer
,
788 msecs_to_jiffies(sw_elem
->count
*
789 cbss
->beacon_interval
));
793 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
794 u16 capab_info
, u8
*pwr_constr_elem
,
795 u8 pwr_constr_elem_len
)
797 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
799 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
802 /* Power constraint IE length should be 1 octet */
803 if (pwr_constr_elem_len
!= 1)
806 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
807 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
808 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
809 ieee80211_hw_config(sdata
->local
, 0);
813 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
815 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
816 struct ieee80211_local
*local
= sdata
->local
;
817 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
819 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
820 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
821 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
823 local
->disable_dynamic_ps
= false;
824 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
826 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
828 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
830 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
831 struct ieee80211_local
*local
= sdata
->local
;
832 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
834 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
835 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
836 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
838 local
->disable_dynamic_ps
= true;
839 conf
->dynamic_ps_timeout
= 0;
840 del_timer_sync(&local
->dynamic_ps_timer
);
841 ieee80211_queue_work(&local
->hw
,
842 &local
->dynamic_ps_enable_work
);
844 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
847 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
848 struct ieee80211_sub_if_data
*sdata
)
850 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
853 * If we are scanning right now then the parameters will
854 * take effect when scan finishes.
859 if (conf
->dynamic_ps_timeout
> 0 &&
860 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
861 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
862 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
864 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
865 ieee80211_send_nullfunc(local
, sdata
, 1);
867 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
868 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
871 conf
->flags
|= IEEE80211_CONF_PS
;
872 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
876 static void ieee80211_change_ps(struct ieee80211_local
*local
)
878 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
880 if (local
->ps_sdata
) {
881 ieee80211_enable_ps(local
, local
->ps_sdata
);
882 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
883 conf
->flags
&= ~IEEE80211_CONF_PS
;
884 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
885 del_timer_sync(&local
->dynamic_ps_timer
);
886 cancel_work_sync(&local
->dynamic_ps_enable_work
);
890 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
892 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
893 struct sta_info
*sta
= NULL
;
894 bool authorized
= false;
902 if (!mgd
->associated
)
905 if (!mgd
->associated
->beacon_ies
)
908 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
909 IEEE80211_STA_CONNECTION_POLL
))
913 sta
= sta_info_get(sdata
, mgd
->bssid
);
915 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
921 /* need to hold RTNL or interface lock */
922 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
924 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
928 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
929 local
->ps_sdata
= NULL
;
933 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
934 if (!ieee80211_sdata_running(sdata
))
936 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
937 /* If an AP vif is found, then disable PS
938 * by setting the count to zero thereby setting
944 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
950 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
951 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
955 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
957 beaconint_us
= ieee80211_tu_to_usec(
958 found
->vif
.bss_conf
.beacon_int
);
960 timeout
= local
->dynamic_ps_forced_timeout
;
963 * Go to full PSM if the user configures a very low
964 * latency requirement.
965 * The 2000 second value is there for compatibility
966 * until the PM_QOS_NETWORK_LATENCY is configured
969 if (latency
> (1900 * USEC_PER_MSEC
) &&
970 latency
!= (2000 * USEC_PER_SEC
))
975 local
->dynamic_ps_user_timeout
= timeout
;
976 if (!local
->disable_dynamic_ps
)
977 conf
->dynamic_ps_timeout
=
978 local
->dynamic_ps_user_timeout
;
980 if (beaconint_us
> latency
) {
981 local
->ps_sdata
= NULL
;
983 struct ieee80211_bss
*bss
;
987 bss
= (void *)found
->u
.mgd
.associated
->priv
;
988 dtimper
= bss
->dtim_period
;
990 /* If the TIM IE is invalid, pretend the value is 1 */
993 else if (dtimper
> 1)
994 maxslp
= min_t(int, dtimper
,
995 latency
/ beaconint_us
);
997 local
->hw
.conf
.max_sleep_period
= maxslp
;
998 local
->hw
.conf
.ps_dtim_period
= dtimper
;
999 local
->ps_sdata
= found
;
1002 local
->ps_sdata
= NULL
;
1005 ieee80211_change_ps(local
);
1008 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1010 struct ieee80211_local
*local
=
1011 container_of(work
, struct ieee80211_local
,
1012 dynamic_ps_disable_work
);
1014 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1015 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1016 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1019 ieee80211_wake_queues_by_reason(&local
->hw
,
1020 IEEE80211_QUEUE_STOP_REASON_PS
);
1023 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1025 struct ieee80211_local
*local
=
1026 container_of(work
, struct ieee80211_local
,
1027 dynamic_ps_enable_work
);
1028 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1029 struct ieee80211_if_managed
*ifmgd
;
1030 unsigned long flags
;
1033 /* can only happen when PS was just disabled anyway */
1037 ifmgd
= &sdata
->u
.mgd
;
1039 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1042 if (!local
->disable_dynamic_ps
&&
1043 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1044 /* don't enter PS if TX frames are pending */
1045 if (drv_tx_frames_pending(local
)) {
1046 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1048 local
->hw
.conf
.dynamic_ps_timeout
));
1053 * transmission can be stopped by others which leads to
1054 * dynamic_ps_timer expiry. Postpone the ps timer if it
1055 * is not the actual idle state.
1057 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1058 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1059 if (local
->queue_stop_reasons
[q
]) {
1060 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1062 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1064 local
->hw
.conf
.dynamic_ps_timeout
));
1068 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1071 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1072 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1073 netif_tx_stop_all_queues(sdata
->dev
);
1075 if (drv_tx_frames_pending(local
))
1076 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1078 local
->hw
.conf
.dynamic_ps_timeout
));
1080 ieee80211_send_nullfunc(local
, sdata
, 1);
1081 /* Flush to get the tx status of nullfunc frame */
1082 drv_flush(local
, false);
1086 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1087 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1088 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1089 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1090 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1091 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1094 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1095 netif_tx_wake_all_queues(sdata
->dev
);
1098 void ieee80211_dynamic_ps_timer(unsigned long data
)
1100 struct ieee80211_local
*local
= (void *) data
;
1102 if (local
->quiescing
|| local
->suspended
)
1105 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1109 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1110 struct ieee80211_sub_if_data
*sdata
,
1111 u8
*wmm_param
, size_t wmm_param_len
)
1113 struct ieee80211_tx_queue_params params
;
1114 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1117 u8
*pos
, uapsd_queues
= 0;
1119 if (!local
->ops
->conf_tx
)
1122 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1128 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1131 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1132 uapsd_queues
= ifmgd
->uapsd_queues
;
1134 count
= wmm_param
[6] & 0x0f;
1135 if (count
== ifmgd
->wmm_last_param_set
)
1137 ifmgd
->wmm_last_param_set
= count
;
1139 pos
= wmm_param
+ 8;
1140 left
= wmm_param_len
- 8;
1142 memset(¶ms
, 0, sizeof(params
));
1145 for (; left
>= 4; left
-= 4, pos
+= 4) {
1146 int aci
= (pos
[0] >> 5) & 0x03;
1147 int acm
= (pos
[0] >> 4) & 0x01;
1155 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1156 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1162 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1163 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1169 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1170 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1177 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1178 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1183 params
.aifs
= pos
[0] & 0x0f;
1184 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1185 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1186 params
.txop
= get_unaligned_le16(pos
+ 2);
1187 params
.uapsd
= uapsd
;
1189 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1190 wiphy_debug(local
->hw
.wiphy
,
1191 "WMM queue=%d aci=%d acm=%d aifs=%d "
1192 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1194 params
.aifs
, params
.cw_min
, params
.cw_max
,
1195 params
.txop
, params
.uapsd
);
1197 sdata
->tx_conf
[queue
] = params
;
1198 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1199 wiphy_debug(local
->hw
.wiphy
,
1200 "failed to set TX queue parameters for queue %d\n",
1204 /* enable WMM or activate new settings */
1205 sdata
->vif
.bss_conf
.qos
= true;
1208 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1210 lockdep_assert_held(&sdata
->local
->mtx
);
1212 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1213 IEEE80211_STA_BEACON_POLL
);
1214 ieee80211_run_deferred_scan(sdata
->local
);
1217 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1219 mutex_lock(&sdata
->local
->mtx
);
1220 __ieee80211_stop_poll(sdata
);
1221 mutex_unlock(&sdata
->local
->mtx
);
1224 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1225 u16 capab
, bool erp_valid
, u8 erp
)
1227 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1229 bool use_protection
;
1230 bool use_short_preamble
;
1231 bool use_short_slot
;
1234 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1235 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1237 use_protection
= false;
1238 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1241 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1242 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1243 use_short_slot
= true;
1245 if (use_protection
!= bss_conf
->use_cts_prot
) {
1246 bss_conf
->use_cts_prot
= use_protection
;
1247 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1250 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1251 bss_conf
->use_short_preamble
= use_short_preamble
;
1252 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1255 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1256 bss_conf
->use_short_slot
= use_short_slot
;
1257 changed
|= BSS_CHANGED_ERP_SLOT
;
1263 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1264 struct cfg80211_bss
*cbss
,
1265 u32 bss_info_changed
)
1267 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1268 struct ieee80211_local
*local
= sdata
->local
;
1269 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1271 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1272 /* set timing information */
1273 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1274 bss_conf
->last_tsf
= cbss
->tsf
;
1276 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1277 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1278 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1280 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1281 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1283 sdata
->u
.mgd
.associated
= cbss
;
1284 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1286 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1288 /* just to be sure */
1289 ieee80211_stop_poll(sdata
);
1291 ieee80211_led_assoc(local
, 1);
1293 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1294 bss_conf
->dtim_period
= bss
->dtim_period
;
1296 bss_conf
->dtim_period
= 0;
1298 bss_conf
->assoc
= 1;
1300 /* Tell the driver to monitor connection quality (if supported) */
1301 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1302 bss_conf
->cqm_rssi_thold
)
1303 bss_info_changed
|= BSS_CHANGED_CQM
;
1305 /* Enable ARP filtering */
1306 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1307 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1308 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1311 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1313 mutex_lock(&local
->iflist_mtx
);
1314 ieee80211_recalc_ps(local
, -1);
1315 ieee80211_recalc_smps(local
);
1316 mutex_unlock(&local
->iflist_mtx
);
1318 netif_tx_start_all_queues(sdata
->dev
);
1319 netif_carrier_on(sdata
->dev
);
1322 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1323 u16 stype
, u16 reason
, bool tx
,
1326 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1327 struct ieee80211_local
*local
= sdata
->local
;
1328 struct sta_info
*sta
;
1332 ASSERT_MGD_MTX(ifmgd
);
1334 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1337 if (WARN_ON(!ifmgd
->associated
))
1340 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1342 ifmgd
->associated
= NULL
;
1343 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1359 netif_tx_stop_all_queues(sdata
->dev
);
1360 netif_carrier_off(sdata
->dev
);
1362 mutex_lock(&local
->sta_mtx
);
1363 sta
= sta_info_get(sdata
, bssid
);
1365 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1366 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1368 mutex_unlock(&local
->sta_mtx
);
1370 /* deauthenticate/disassociate now */
1371 if (tx
|| frame_buf
)
1372 ieee80211_send_deauth_disassoc(sdata
, bssid
, stype
, reason
,
1375 /* flush out frame */
1377 drv_flush(local
, false);
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local
, sdata
);
1382 /* finally reset all BSS / config parameters */
1383 changed
|= ieee80211_reset_erp_info(sdata
);
1385 ieee80211_led_assoc(local
, 0);
1386 changed
|= BSS_CHANGED_ASSOC
;
1387 sdata
->vif
.bss_conf
.assoc
= false;
1389 /* on the next assoc, re-program HT parameters */
1390 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1391 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1393 local
->power_constr_level
= 0;
1395 del_timer_sync(&local
->dynamic_ps_timer
);
1396 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1398 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1399 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1400 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1402 local
->ps_sdata
= NULL
;
1404 /* Disable ARP filtering */
1405 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1406 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1407 changed
|= BSS_CHANGED_ARP_FILTER
;
1410 sdata
->vif
.bss_conf
.qos
= false;
1411 changed
|= BSS_CHANGED_QOS
;
1413 /* The BSSID (not really interesting) and HT changed */
1414 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1415 ieee80211_bss_info_change_notify(sdata
, changed
);
1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1419 ieee80211_hw_config(local
, 0);
1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata
, false);
1424 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1425 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1426 del_timer_sync(&sdata
->u
.mgd
.timer
);
1427 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1430 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1431 struct ieee80211_hdr
*hdr
)
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
1441 if (is_multicast_ether_addr(hdr
->addr1
))
1444 ieee80211_sta_reset_conn_monitor(sdata
);
1447 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1449 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1450 struct ieee80211_local
*local
= sdata
->local
;
1452 mutex_lock(&local
->mtx
);
1453 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1454 IEEE80211_STA_CONNECTION_POLL
))) {
1455 mutex_unlock(&local
->mtx
);
1459 __ieee80211_stop_poll(sdata
);
1461 mutex_lock(&local
->iflist_mtx
);
1462 ieee80211_recalc_ps(local
, -1);
1463 mutex_unlock(&local
->iflist_mtx
);
1465 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1469 * We've received a probe response, but are not sure whether
1470 * we have or will be receiving any beacons or data, so let's
1471 * schedule the timers again, just in case.
1473 ieee80211_sta_reset_beacon_monitor(sdata
);
1475 mod_timer(&ifmgd
->conn_mon_timer
,
1476 round_jiffies_up(jiffies
+
1477 IEEE80211_CONNECTION_IDLE_TIME
));
1479 mutex_unlock(&local
->mtx
);
1482 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1483 struct ieee80211_hdr
*hdr
, bool ack
)
1485 if (!ieee80211_is_data(hdr
->frame_control
))
1489 ieee80211_sta_reset_conn_monitor(sdata
);
1491 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1492 sdata
->u
.mgd
.probe_send_count
> 0) {
1494 sdata
->u
.mgd
.probe_send_count
= 0;
1496 sdata
->u
.mgd
.nullfunc_failed
= true;
1497 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1501 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1503 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1505 u8
*dst
= ifmgd
->associated
->bssid
;
1506 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1509 * Try sending broadcast probe requests for the last three
1510 * probe requests after the first ones failed since some
1511 * buggy APs only support broadcast probe requests.
1513 if (ifmgd
->probe_send_count
>= unicast_limit
)
1517 * When the hardware reports an accurate Tx ACK status, it's
1518 * better to send a nullfunc frame instead of a probe request,
1519 * as it will kick us off the AP quickly if we aren't associated
1520 * anymore. The timeout will be reset if the frame is ACKed by
1523 ifmgd
->probe_send_count
++;
1525 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1526 ifmgd
->nullfunc_failed
= false;
1527 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1531 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1532 if (WARN_ON_ONCE(ssid
== NULL
))
1537 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1538 0, (u32
) -1, true, false);
1541 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1542 run_again(ifmgd
, ifmgd
->probe_timeout
);
1543 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1544 drv_flush(sdata
->local
, false);
1547 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1550 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1551 bool already
= false;
1553 if (!ieee80211_sdata_running(sdata
))
1556 mutex_lock(&ifmgd
->mtx
);
1558 if (!ifmgd
->associated
)
1561 mutex_lock(&sdata
->local
->mtx
);
1563 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1564 mutex_unlock(&sdata
->local
->mtx
);
1568 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1570 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1573 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1574 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1577 * The driver/our work has already reported this event or the
1578 * connection monitoring has kicked in and we have already sent
1579 * a probe request. Or maybe the AP died and the driver keeps
1580 * reporting until we disassociate...
1582 * In either case we have to ignore the current call to this
1583 * function (except for setting the correct probe reason bit)
1584 * because otherwise we would reset the timer every time and
1585 * never check whether we received a probe response!
1587 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1588 IEEE80211_STA_CONNECTION_POLL
))
1592 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1594 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1596 mutex_unlock(&sdata
->local
->mtx
);
1601 mutex_lock(&sdata
->local
->iflist_mtx
);
1602 ieee80211_recalc_ps(sdata
->local
, -1);
1603 mutex_unlock(&sdata
->local
->iflist_mtx
);
1605 ifmgd
->probe_send_count
= 0;
1606 ieee80211_mgd_probe_ap_send(sdata
);
1608 mutex_unlock(&ifmgd
->mtx
);
1611 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1612 struct ieee80211_vif
*vif
)
1614 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1615 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1616 struct sk_buff
*skb
;
1620 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1623 ASSERT_MGD_MTX(ifmgd
);
1625 if (!ifmgd
->associated
)
1628 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1629 if (WARN_ON_ONCE(ssid
== NULL
))
1634 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1635 (u32
) -1, ssid
+ 2, ssid_len
,
1640 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1642 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1644 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1645 struct ieee80211_local
*local
= sdata
->local
;
1647 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1649 mutex_lock(&ifmgd
->mtx
);
1650 if (!ifmgd
->associated
) {
1651 mutex_unlock(&ifmgd
->mtx
);
1655 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1657 pr_debug("%s: Connection to AP %pM lost\n", sdata
->name
, bssid
);
1659 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1662 mutex_unlock(&ifmgd
->mtx
);
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1668 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1670 mutex_lock(&local
->mtx
);
1671 ieee80211_recalc_idle(local
);
1672 mutex_unlock(&local
->mtx
);
1675 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1677 struct ieee80211_sub_if_data
*sdata
=
1678 container_of(work
, struct ieee80211_sub_if_data
,
1679 u
.mgd
.beacon_connection_loss_work
);
1680 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1681 struct sta_info
*sta
;
1683 if (ifmgd
->associated
) {
1685 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1687 sta
->beacon_loss_count
++;
1691 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1692 __ieee80211_connection_loss(sdata
);
1694 ieee80211_mgd_probe_ap(sdata
, true);
1697 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1699 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1700 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1702 trace_api_beacon_loss(sdata
);
1704 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1705 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1707 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1709 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1711 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1712 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1714 trace_api_connection_loss(sdata
);
1716 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1717 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1719 EXPORT_SYMBOL(ieee80211_connection_loss
);
1722 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1725 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1727 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1730 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1732 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1733 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1736 cfg80211_put_bss(auth_data
->bss
);
1738 sdata
->u
.mgd
.auth_data
= NULL
;
1741 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1742 struct ieee80211_mgmt
*mgmt
, size_t len
)
1744 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1746 struct ieee802_11_elems elems
;
1748 pos
= mgmt
->u
.auth
.variable
;
1749 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1750 if (!elems
.challenge
)
1752 auth_data
->expected_transaction
= 4;
1753 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1754 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1755 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1756 auth_data
->key
, auth_data
->key_len
,
1757 auth_data
->key_idx
);
1760 static enum rx_mgmt_action __must_check
1761 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1762 struct ieee80211_mgmt
*mgmt
, size_t len
)
1764 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1766 u16 auth_alg
, auth_transaction
, status_code
;
1767 struct sta_info
*sta
;
1769 lockdep_assert_held(&ifmgd
->mtx
);
1772 return RX_MGMT_NONE
;
1774 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1775 return RX_MGMT_NONE
;
1777 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1779 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1780 return RX_MGMT_NONE
;
1782 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1783 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1784 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1786 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1787 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1788 return RX_MGMT_NONE
;
1790 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1791 pr_debug("%s: %pM denied authentication (status %d)\n",
1792 sdata
->name
, mgmt
->sa
, status_code
);
1793 ieee80211_destroy_auth_data(sdata
, false);
1794 return RX_MGMT_CFG80211_RX_AUTH
;
1797 switch (ifmgd
->auth_data
->algorithm
) {
1798 case WLAN_AUTH_OPEN
:
1799 case WLAN_AUTH_LEAP
:
1802 case WLAN_AUTH_SHARED_KEY
:
1803 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1804 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1805 /* need another frame */
1806 return RX_MGMT_NONE
;
1810 WARN_ONCE(1, "invalid auth alg %d",
1811 ifmgd
->auth_data
->algorithm
);
1812 return RX_MGMT_NONE
;
1815 pr_debug("%s: authenticated\n", sdata
->name
);
1816 ifmgd
->auth_data
->done
= true;
1817 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1818 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1820 /* move station state to auth */
1821 mutex_lock(&sdata
->local
->sta_mtx
);
1822 sta
= sta_info_get(sdata
, bssid
);
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1827 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1828 pr_debug("%s: failed moving %pM to auth\n", sdata
->name
, bssid
);
1831 mutex_unlock(&sdata
->local
->sta_mtx
);
1833 return RX_MGMT_CFG80211_RX_AUTH
;
1835 mutex_unlock(&sdata
->local
->sta_mtx
);
1836 /* ignore frame -- wait for timeout */
1837 return RX_MGMT_NONE
;
1841 static enum rx_mgmt_action __must_check
1842 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1843 struct ieee80211_mgmt
*mgmt
, size_t len
)
1845 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1846 const u8
*bssid
= NULL
;
1849 lockdep_assert_held(&ifmgd
->mtx
);
1852 return RX_MGMT_NONE
;
1854 if (!ifmgd
->associated
||
1855 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1856 return RX_MGMT_NONE
;
1858 bssid
= ifmgd
->associated
->bssid
;
1860 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1862 pr_debug("%s: deauthenticated from %pM (Reason: %u)\n",
1863 sdata
->name
, bssid
, reason_code
);
1865 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1867 mutex_lock(&sdata
->local
->mtx
);
1868 ieee80211_recalc_idle(sdata
->local
);
1869 mutex_unlock(&sdata
->local
->mtx
);
1871 return RX_MGMT_CFG80211_DEAUTH
;
1875 static enum rx_mgmt_action __must_check
1876 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1877 struct ieee80211_mgmt
*mgmt
, size_t len
)
1879 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1882 lockdep_assert_held(&ifmgd
->mtx
);
1885 return RX_MGMT_NONE
;
1887 if (!ifmgd
->associated
||
1888 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1889 return RX_MGMT_NONE
;
1891 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1893 pr_debug("%s: disassociated from %pM (Reason: %u)\n",
1894 sdata
->name
, mgmt
->sa
, reason_code
);
1896 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1898 mutex_lock(&sdata
->local
->mtx
);
1899 ieee80211_recalc_idle(sdata
->local
);
1900 mutex_unlock(&sdata
->local
->mtx
);
1902 return RX_MGMT_CFG80211_DISASSOC
;
1905 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1906 u8
*supp_rates
, unsigned int supp_rates_len
,
1907 u32
*rates
, u32
*basic_rates
,
1908 bool *have_higher_than_11mbit
,
1909 int *min_rate
, int *min_rate_index
)
1913 for (i
= 0; i
< supp_rates_len
; i
++) {
1914 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1915 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1918 *have_higher_than_11mbit
= true;
1921 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1922 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1924 * Note: Even through the membership selector and the basic
1925 * rate flag share the same bit, they are not exactly
1928 if (!!(supp_rates
[i
] & 0x80) &&
1929 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1932 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1933 if (sband
->bitrates
[j
].bitrate
== rate
) {
1936 *basic_rates
|= BIT(j
);
1937 if (rate
< *min_rate
) {
1939 *min_rate_index
= j
;
1947 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1950 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1952 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1955 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1957 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1958 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1962 sdata
->u
.mgd
.assoc_data
= NULL
;
1965 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1966 struct cfg80211_bss
*cbss
,
1967 struct ieee80211_mgmt
*mgmt
, size_t len
)
1969 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1970 struct ieee80211_local
*local
= sdata
->local
;
1971 struct ieee80211_supported_band
*sband
;
1972 struct sta_info
*sta
;
1974 u16 capab_info
, aid
;
1975 struct ieee802_11_elems elems
;
1976 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1980 /* AssocResp and ReassocResp have identical structure */
1982 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1983 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1985 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1986 pr_debug("%s: invalid AID value 0x%x; bits 15:14 not set\n",
1988 aid
&= ~(BIT(15) | BIT(14));
1990 ifmgd
->broken_ap
= false;
1992 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1993 pr_debug("%s: invalid AID value %d (out of range), turn off PS\n",
1996 ifmgd
->broken_ap
= true;
1999 pos
= mgmt
->u
.assoc_resp
.variable
;
2000 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2002 if (!elems
.supp_rates
) {
2003 pr_debug("%s: no SuppRates element in AssocResp\n",
2010 mutex_lock(&sdata
->local
->sta_mtx
);
2012 * station info was already allocated and inserted before
2013 * the association and should be available to us
2015 sta
= sta_info_get(sdata
, cbss
->bssid
);
2016 if (WARN_ON(!sta
)) {
2017 mutex_unlock(&sdata
->local
->sta_mtx
);
2021 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2023 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2024 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2025 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2027 sta
->supports_40mhz
=
2028 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2030 rate_control_rate_init(sta
);
2032 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2033 set_sta_flag(sta
, WLAN_STA_MFP
);
2035 if (elems
.wmm_param
)
2036 set_sta_flag(sta
, WLAN_STA_WME
);
2038 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2040 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2041 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2042 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2044 pr_debug("%s: failed to move station %pM to desired state\n",
2045 sdata
->name
, sta
->sta
.addr
);
2046 WARN_ON(__sta_info_destroy(sta
));
2047 mutex_unlock(&sdata
->local
->sta_mtx
);
2051 mutex_unlock(&sdata
->local
->sta_mtx
);
2054 * Always handle WMM once after association regardless
2055 * of the first value the AP uses. Setting -1 here has
2056 * that effect because the AP values is an unsigned
2059 ifmgd
->wmm_last_param_set
= -1;
2061 if (elems
.wmm_param
)
2062 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2063 elems
.wmm_param_len
);
2065 ieee80211_set_wmm_default(sdata
, false);
2066 changed
|= BSS_CHANGED_QOS
;
2068 if (elems
.ht_operation
&& elems
.wmm_param
&&
2069 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2070 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2071 cbss
->bssid
, false);
2073 /* set AID and assoc capability,
2074 * ieee80211_set_associated() will tell the driver */
2075 bss_conf
->aid
= aid
;
2076 bss_conf
->assoc_capability
= capab_info
;
2077 ieee80211_set_associated(sdata
, cbss
, changed
);
2080 * If we're using 4-addr mode, let the AP know that we're
2081 * doing so, so that it can create the STA VLAN on its side
2083 if (ifmgd
->use_4addr
)
2084 ieee80211_send_4addr_nullfunc(local
, sdata
);
2087 * Start timer to probe the connection to the AP now.
2088 * Also start the timer that will detect beacon loss.
2090 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2091 ieee80211_sta_reset_beacon_monitor(sdata
);
2096 static enum rx_mgmt_action __must_check
2097 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2098 struct ieee80211_mgmt
*mgmt
, size_t len
,
2099 struct cfg80211_bss
**bss
)
2101 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2102 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2103 u16 capab_info
, status_code
, aid
;
2104 struct ieee802_11_elems elems
;
2108 lockdep_assert_held(&ifmgd
->mtx
);
2111 return RX_MGMT_NONE
;
2112 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2113 return RX_MGMT_NONE
;
2116 * AssocResp and ReassocResp have identical structure, so process both
2117 * of them in this function.
2121 return RX_MGMT_NONE
;
2123 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2124 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2125 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2126 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2128 pr_debug("%s: RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2129 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2130 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2132 pos
= mgmt
->u
.assoc_resp
.variable
;
2133 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2135 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2136 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2137 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2139 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2140 ms
= tu
* 1024 / 1000;
2141 pr_debug("%s: %pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2142 sdata
->name
, mgmt
->sa
, tu
, ms
);
2143 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2144 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2145 run_again(ifmgd
, assoc_data
->timeout
);
2146 return RX_MGMT_NONE
;
2149 *bss
= assoc_data
->bss
;
2151 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2152 pr_debug("%s: %pM denied association (code=%d)\n",
2153 sdata
->name
, mgmt
->sa
, status_code
);
2154 ieee80211_destroy_assoc_data(sdata
, false);
2156 pr_debug("%s: associated\n", sdata
->name
);
2158 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2159 /* oops -- internal error -- send timeout for now */
2160 ieee80211_destroy_assoc_data(sdata
, true);
2161 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2162 cfg80211_put_bss(*bss
);
2163 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2167 * destroy assoc_data afterwards, as otherwise an idle
2168 * recalc after assoc_data is NULL but before associated
2169 * is set can cause the interface to go idle
2171 ieee80211_destroy_assoc_data(sdata
, true);
2174 return RX_MGMT_CFG80211_RX_ASSOC
;
2176 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2177 struct ieee80211_mgmt
*mgmt
,
2179 struct ieee80211_rx_status
*rx_status
,
2180 struct ieee802_11_elems
*elems
,
2183 struct ieee80211_local
*local
= sdata
->local
;
2185 struct ieee80211_bss
*bss
;
2186 struct ieee80211_channel
*channel
;
2187 bool need_ps
= false;
2189 if (sdata
->u
.mgd
.associated
&&
2190 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2191 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2192 /* not previously set so we may need to recalc */
2193 need_ps
= !bss
->dtim_period
;
2196 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2197 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2200 freq
= rx_status
->freq
;
2202 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2204 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2207 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2210 ieee80211_rx_bss_put(local
, bss
);
2212 if (!sdata
->u
.mgd
.associated
)
2216 mutex_lock(&local
->iflist_mtx
);
2217 ieee80211_recalc_ps(local
, -1);
2218 mutex_unlock(&local
->iflist_mtx
);
2221 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2222 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2224 struct ieee80211_channel_sw_ie
*sw_elem
=
2225 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2226 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2227 bss
, rx_status
->mactime
);
2232 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2233 struct sk_buff
*skb
)
2235 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2236 struct ieee80211_if_managed
*ifmgd
;
2237 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2238 size_t baselen
, len
= skb
->len
;
2239 struct ieee802_11_elems elems
;
2241 ifmgd
= &sdata
->u
.mgd
;
2243 ASSERT_MGD_MTX(ifmgd
);
2245 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2246 return; /* ignore ProbeResp to foreign address */
2248 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2252 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2255 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2257 if (ifmgd
->associated
&&
2258 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2259 ieee80211_reset_ap_probe(sdata
);
2261 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2262 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2263 /* got probe response, continue with auth */
2264 pr_debug("%s: direct probe responded\n", sdata
->name
);
2265 ifmgd
->auth_data
->tries
= 0;
2266 ifmgd
->auth_data
->timeout
= jiffies
;
2267 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2272 * This is the canonical list of information elements we care about,
2273 * the filter code also gives us all changes to the Microsoft OUI
2274 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2276 * We implement beacon filtering in software since that means we can
2277 * avoid processing the frame here and in cfg80211, and userspace
2278 * will not be able to tell whether the hardware supports it or not.
2280 * XXX: This list needs to be dynamic -- userspace needs to be able to
2281 * add items it requires. It also needs to be able to tell us to
2282 * look out for other vendor IEs.
2284 static const u64 care_about_ies
=
2285 (1ULL << WLAN_EID_COUNTRY
) |
2286 (1ULL << WLAN_EID_ERP_INFO
) |
2287 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2288 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2289 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2290 (1ULL << WLAN_EID_HT_OPERATION
);
2292 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2293 struct ieee80211_mgmt
*mgmt
,
2295 struct ieee80211_rx_status
*rx_status
)
2297 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2298 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2300 struct ieee802_11_elems elems
;
2301 struct ieee80211_local
*local
= sdata
->local
;
2303 bool erp_valid
, directed_tim
= false;
2308 lockdep_assert_held(&ifmgd
->mtx
);
2310 /* Process beacon from the current BSS */
2311 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2315 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2318 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2319 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2320 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2321 len
- baselen
, &elems
);
2323 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2325 ifmgd
->assoc_data
->have_beacon
= true;
2326 ifmgd
->assoc_data
->sent_assoc
= false;
2327 /* continue assoc process */
2328 ifmgd
->assoc_data
->timeout
= jiffies
;
2329 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2333 if (!ifmgd
->associated
||
2334 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2336 bssid
= ifmgd
->associated
->bssid
;
2338 /* Track average RSSI from the Beacon frames of the current AP */
2339 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2340 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2341 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2342 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2343 ifmgd
->last_cqm_event_signal
= 0;
2344 ifmgd
->count_beacon_signal
= 1;
2345 ifmgd
->last_ave_beacon_signal
= 0;
2347 ifmgd
->ave_beacon_signal
=
2348 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2349 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2350 ifmgd
->ave_beacon_signal
) / 16;
2351 ifmgd
->count_beacon_signal
++;
2354 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2355 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2356 int sig
= ifmgd
->ave_beacon_signal
;
2357 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2360 * if signal crosses either of the boundaries, invoke callback
2361 * with appropriate parameters
2363 if (sig
> ifmgd
->rssi_max_thold
&&
2364 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2365 ifmgd
->last_ave_beacon_signal
= sig
;
2366 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2367 } else if (sig
< ifmgd
->rssi_min_thold
&&
2368 (last_sig
>= ifmgd
->rssi_max_thold
||
2370 ifmgd
->last_ave_beacon_signal
= sig
;
2371 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2375 if (bss_conf
->cqm_rssi_thold
&&
2376 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2377 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2378 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2379 int last_event
= ifmgd
->last_cqm_event_signal
;
2380 int thold
= bss_conf
->cqm_rssi_thold
;
2381 int hyst
= bss_conf
->cqm_rssi_hyst
;
2383 (last_event
== 0 || sig
< last_event
- hyst
)) {
2384 ifmgd
->last_cqm_event_signal
= sig
;
2385 ieee80211_cqm_rssi_notify(
2387 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2389 } else if (sig
> thold
&&
2390 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2391 ifmgd
->last_cqm_event_signal
= sig
;
2392 ieee80211_cqm_rssi_notify(
2394 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2399 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2400 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2401 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2404 mutex_lock(&local
->mtx
);
2405 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2406 ieee80211_run_deferred_scan(local
);
2407 mutex_unlock(&local
->mtx
);
2409 mutex_lock(&local
->iflist_mtx
);
2410 ieee80211_recalc_ps(local
, -1);
2411 mutex_unlock(&local
->iflist_mtx
);
2415 * Push the beacon loss detection into the future since
2416 * we are processing a beacon from the AP just now.
2418 ieee80211_sta_reset_beacon_monitor(sdata
);
2420 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2421 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2422 len
- baselen
, &elems
,
2423 care_about_ies
, ncrc
);
2425 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2426 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2429 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2430 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2433 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2434 elems
.wmm_param_len
);
2437 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2439 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2440 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2441 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2442 ieee80211_hw_config(local
,
2443 IEEE80211_CONF_CHANGE_PS
);
2445 ieee80211_send_nullfunc(local
, sdata
, 0);
2446 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2447 local
->pspolling
= true;
2450 * Here is assumed that the driver will be
2451 * able to send ps-poll frame and receive a
2452 * response even though power save mode is
2453 * enabled, but some drivers might require
2454 * to disable power save here. This needs
2455 * to be investigated.
2457 ieee80211_send_pspoll(local
, sdata
);
2462 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2464 ifmgd
->beacon_crc
= ncrc
;
2465 ifmgd
->beacon_crc_valid
= true;
2467 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2469 erp_value
= elems
.erp_info
[0];
2473 changed
|= ieee80211_handle_bss_capability(sdata
,
2474 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2475 erp_valid
, erp_value
);
2478 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2479 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2480 struct ieee80211_supported_band
*sband
;
2482 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2484 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2488 /* Note: country IE parsing is done for us by cfg80211 */
2489 if (elems
.country_elem
) {
2490 /* TODO: IBSS also needs this */
2491 if (elems
.pwr_constr_elem
)
2492 ieee80211_handle_pwr_constr(sdata
,
2493 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2494 elems
.pwr_constr_elem
,
2495 elems
.pwr_constr_elem_len
);
2498 ieee80211_bss_info_change_notify(sdata
, changed
);
2501 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2502 struct sk_buff
*skb
)
2504 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2505 struct ieee80211_rx_status
*rx_status
;
2506 struct ieee80211_mgmt
*mgmt
;
2507 struct cfg80211_bss
*bss
= NULL
;
2508 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2511 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2512 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2513 fc
= le16_to_cpu(mgmt
->frame_control
);
2515 mutex_lock(&ifmgd
->mtx
);
2517 switch (fc
& IEEE80211_FCTL_STYPE
) {
2518 case IEEE80211_STYPE_BEACON
:
2519 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2521 case IEEE80211_STYPE_PROBE_RESP
:
2522 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2524 case IEEE80211_STYPE_AUTH
:
2525 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2527 case IEEE80211_STYPE_DEAUTH
:
2528 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2530 case IEEE80211_STYPE_DISASSOC
:
2531 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2533 case IEEE80211_STYPE_ASSOC_RESP
:
2534 case IEEE80211_STYPE_REASSOC_RESP
:
2535 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2537 case IEEE80211_STYPE_ACTION
:
2538 switch (mgmt
->u
.action
.category
) {
2539 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2540 ieee80211_sta_process_chanswitch(sdata
,
2541 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2542 (void *)ifmgd
->associated
->priv
,
2543 rx_status
->mactime
);
2547 mutex_unlock(&ifmgd
->mtx
);
2553 case RX_MGMT_CFG80211_DEAUTH
:
2554 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2556 case RX_MGMT_CFG80211_DISASSOC
:
2557 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2559 case RX_MGMT_CFG80211_RX_AUTH
:
2560 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2562 case RX_MGMT_CFG80211_RX_ASSOC
:
2563 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2565 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2566 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2569 WARN(1, "unexpected: %d", rma
);
2573 static void ieee80211_sta_timer(unsigned long data
)
2575 struct ieee80211_sub_if_data
*sdata
=
2576 (struct ieee80211_sub_if_data
*) data
;
2577 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2578 struct ieee80211_local
*local
= sdata
->local
;
2580 if (local
->quiescing
) {
2581 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2585 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2588 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2589 u8
*bssid
, u8 reason
)
2591 struct ieee80211_local
*local
= sdata
->local
;
2592 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2593 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2595 ieee80211_stop_poll(sdata
);
2597 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2599 mutex_unlock(&ifmgd
->mtx
);
2602 * must be outside lock due to cfg80211,
2603 * but that's not a problem.
2605 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2607 mutex_lock(&local
->mtx
);
2608 ieee80211_recalc_idle(local
);
2609 mutex_unlock(&local
->mtx
);
2611 mutex_lock(&ifmgd
->mtx
);
2614 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2616 struct ieee80211_local
*local
= sdata
->local
;
2617 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2618 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2620 lockdep_assert_held(&ifmgd
->mtx
);
2622 if (WARN_ON_ONCE(!auth_data
))
2627 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2628 pr_debug("%s: authentication with %pM timed out\n",
2629 sdata
->name
, auth_data
->bss
->bssid
);
2632 * Most likely AP is not in the range so remove the
2633 * bss struct for that AP.
2635 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2640 if (auth_data
->bss
->proberesp_ies
) {
2641 pr_debug("%s: send auth to %pM (try %d/%d)\n",
2642 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2643 IEEE80211_AUTH_MAX_TRIES
);
2645 auth_data
->expected_transaction
= 2;
2646 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2647 auth_data
->ie
, auth_data
->ie_len
,
2648 auth_data
->bss
->bssid
,
2649 auth_data
->bss
->bssid
, NULL
, 0, 0);
2653 pr_debug("%s: direct probe to %pM (try %d/%i)\n",
2654 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2655 IEEE80211_AUTH_MAX_TRIES
);
2657 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2661 * Direct probe is sent to broadcast address as some APs
2662 * will not answer to direct packet in unassociated state.
2664 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2665 NULL
, 0, (u32
) -1, true, false);
2668 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2669 run_again(ifmgd
, auth_data
->timeout
);
2674 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2676 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2677 struct ieee80211_local
*local
= sdata
->local
;
2679 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2681 assoc_data
->tries
++;
2682 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2683 pr_debug("%s: association with %pM timed out\n",
2684 sdata
->name
, assoc_data
->bss
->bssid
);
2687 * Most likely AP is not in the range so remove the
2688 * bss struct for that AP.
2690 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2695 pr_debug("%s: associate with %pM (try %d/%d)\n",
2696 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2697 IEEE80211_ASSOC_MAX_TRIES
);
2698 ieee80211_send_assoc(sdata
);
2700 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2701 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2706 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2708 struct ieee80211_local
*local
= sdata
->local
;
2709 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2711 mutex_lock(&ifmgd
->mtx
);
2713 if (ifmgd
->auth_data
&&
2714 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2715 if (ifmgd
->auth_data
->done
) {
2717 * ok ... we waited for assoc but userspace didn't,
2718 * so let's just kill the auth data
2720 ieee80211_destroy_auth_data(sdata
, false);
2721 } else if (ieee80211_probe_auth(sdata
)) {
2724 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2726 ieee80211_destroy_auth_data(sdata
, false);
2728 mutex_unlock(&ifmgd
->mtx
);
2729 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2730 mutex_lock(&ifmgd
->mtx
);
2732 } else if (ifmgd
->auth_data
)
2733 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2735 if (ifmgd
->assoc_data
&&
2736 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2737 if (!ifmgd
->assoc_data
->have_beacon
||
2738 ieee80211_do_assoc(sdata
)) {
2741 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2743 ieee80211_destroy_assoc_data(sdata
, false);
2745 mutex_unlock(&ifmgd
->mtx
);
2746 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2747 mutex_lock(&ifmgd
->mtx
);
2749 } else if (ifmgd
->assoc_data
)
2750 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2752 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2753 IEEE80211_STA_CONNECTION_POLL
) &&
2754 ifmgd
->associated
) {
2758 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2760 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2761 max_tries
= max_nullfunc_tries
;
2763 max_tries
= max_probe_tries
;
2765 /* ACK received for nullfunc probing frame */
2766 if (!ifmgd
->probe_send_count
)
2767 ieee80211_reset_ap_probe(sdata
);
2768 else if (ifmgd
->nullfunc_failed
) {
2769 if (ifmgd
->probe_send_count
< max_tries
) {
2770 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2771 wiphy_debug(local
->hw
.wiphy
,
2772 "%s: No ack for nullfunc frame to"
2773 " AP %pM, try %d/%i\n",
2775 ifmgd
->probe_send_count
, max_tries
);
2777 ieee80211_mgd_probe_ap_send(sdata
);
2779 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2780 wiphy_debug(local
->hw
.wiphy
,
2781 "%s: No ack for nullfunc frame to"
2782 " AP %pM, disconnecting.\n",
2783 sdata
->name
, bssid
);
2785 ieee80211_sta_connection_lost(sdata
, bssid
,
2786 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2788 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2789 run_again(ifmgd
, ifmgd
->probe_timeout
);
2790 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2791 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2792 wiphy_debug(local
->hw
.wiphy
,
2793 "%s: Failed to send nullfunc to AP %pM"
2794 " after %dms, disconnecting.\n",
2796 bssid
, probe_wait_ms
);
2798 ieee80211_sta_connection_lost(sdata
, bssid
,
2799 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2800 } else if (ifmgd
->probe_send_count
< max_tries
) {
2801 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2802 wiphy_debug(local
->hw
.wiphy
,
2803 "%s: No probe response from AP %pM"
2804 " after %dms, try %d/%i\n",
2806 bssid
, probe_wait_ms
,
2807 ifmgd
->probe_send_count
, max_tries
);
2809 ieee80211_mgd_probe_ap_send(sdata
);
2812 * We actually lost the connection ... or did we?
2815 wiphy_debug(local
->hw
.wiphy
,
2816 "%s: No probe response from AP %pM"
2817 " after %dms, disconnecting.\n",
2819 bssid
, probe_wait_ms
);
2821 ieee80211_sta_connection_lost(sdata
, bssid
,
2822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2826 mutex_unlock(&ifmgd
->mtx
);
2828 mutex_lock(&local
->mtx
);
2829 ieee80211_recalc_idle(local
);
2830 mutex_unlock(&local
->mtx
);
2833 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2835 struct ieee80211_sub_if_data
*sdata
=
2836 (struct ieee80211_sub_if_data
*) data
;
2837 struct ieee80211_local
*local
= sdata
->local
;
2839 if (local
->quiescing
)
2842 ieee80211_queue_work(&sdata
->local
->hw
,
2843 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2846 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2848 struct ieee80211_sub_if_data
*sdata
=
2849 (struct ieee80211_sub_if_data
*) data
;
2850 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2851 struct ieee80211_local
*local
= sdata
->local
;
2853 if (local
->quiescing
)
2856 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2859 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2861 struct ieee80211_sub_if_data
*sdata
=
2862 container_of(work
, struct ieee80211_sub_if_data
,
2863 u
.mgd
.monitor_work
);
2865 ieee80211_mgd_probe_ap(sdata
, false);
2868 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2872 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2873 __ieee80211_stop_poll(sdata
);
2875 /* let's probe the connection once */
2876 flags
= sdata
->local
->hw
.flags
;
2877 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2878 ieee80211_queue_work(&sdata
->local
->hw
,
2879 &sdata
->u
.mgd
.monitor_work
);
2880 /* and do all the other regular work too */
2881 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2886 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2888 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2891 * we need to use atomic bitops for the running bits
2892 * only because both timers might fire at the same
2893 * time -- the code here is properly synchronised.
2896 cancel_work_sync(&ifmgd
->request_smps_work
);
2898 cancel_work_sync(&ifmgd
->monitor_work
);
2899 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2900 if (del_timer_sync(&ifmgd
->timer
))
2901 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2903 cancel_work_sync(&ifmgd
->chswitch_work
);
2904 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2905 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2907 /* these will just be re-established on connection */
2908 del_timer_sync(&ifmgd
->conn_mon_timer
);
2909 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2912 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2914 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2916 if (!ifmgd
->associated
)
2919 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2920 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2921 mutex_lock(&ifmgd
->mtx
);
2922 if (ifmgd
->associated
) {
2923 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2924 wiphy_debug(sdata
->local
->hw
.wiphy
,
2925 "%s: driver requested disconnect after resume.\n",
2928 ieee80211_sta_connection_lost(sdata
,
2929 ifmgd
->associated
->bssid
,
2930 WLAN_REASON_UNSPECIFIED
);
2931 mutex_unlock(&ifmgd
->mtx
);
2934 mutex_unlock(&ifmgd
->mtx
);
2937 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2938 add_timer(&ifmgd
->timer
);
2939 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2940 add_timer(&ifmgd
->chswitch_timer
);
2941 ieee80211_sta_reset_beacon_monitor(sdata
);
2943 mutex_lock(&sdata
->local
->mtx
);
2944 ieee80211_restart_sta_timer(sdata
);
2945 mutex_unlock(&sdata
->local
->mtx
);
2949 /* interface setup */
2950 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2952 struct ieee80211_if_managed
*ifmgd
;
2954 ifmgd
= &sdata
->u
.mgd
;
2955 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2956 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2957 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2958 ieee80211_beacon_connection_loss_work
);
2959 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2960 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2961 (unsigned long) sdata
);
2962 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2963 (unsigned long) sdata
);
2964 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2965 (unsigned long) sdata
);
2966 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2967 (unsigned long) sdata
);
2970 ifmgd
->powersave
= sdata
->wdev
.ps
;
2971 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2972 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2974 mutex_init(&ifmgd
->mtx
);
2976 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2977 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2979 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2982 /* scan finished notification */
2983 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2985 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2987 /* Restart STA timers */
2989 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2990 ieee80211_restart_sta_timer(sdata
);
2994 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2995 unsigned long data
, void *dummy
)
2997 s32 latency_usec
= (s32
) data
;
2998 struct ieee80211_local
*local
=
2999 container_of(nb
, struct ieee80211_local
,
3000 network_latency_notifier
);
3002 mutex_lock(&local
->iflist_mtx
);
3003 ieee80211_recalc_ps(local
, latency_usec
);
3004 mutex_unlock(&local
->iflist_mtx
);
3009 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3010 struct cfg80211_bss
*cbss
, bool assoc
)
3012 struct ieee80211_local
*local
= sdata
->local
;
3013 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3014 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3015 struct sta_info
*sta
= NULL
;
3016 bool have_sta
= false;
3019 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3020 const u8
*ht_oper_ie
;
3021 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3022 struct ieee80211_supported_band
*sband
;
3024 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3029 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3034 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3039 mutex_lock(&local
->mtx
);
3040 ieee80211_recalc_idle(sdata
->local
);
3041 mutex_unlock(&local
->mtx
);
3043 /* switch to the right channel */
3044 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3046 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3048 if (sband
->ht_cap
.ht_supported
) {
3049 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3050 cbss
->information_elements
,
3051 cbss
->len_information_elements
);
3052 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3053 ht_oper
= (void *)(ht_oper_ie
+ 2);
3057 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3058 cbss
->channel
->band
);
3059 /* check that channel matches the right operating channel */
3060 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3062 * It's possible that some APs are confused here;
3063 * Netgear WNDR3700 sometimes reports 4 higher than
3064 * the actual channel in association responses, but
3065 * since we look at probe response/beacon data here
3068 pr_debug("%s: Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3069 sdata
->name
, cbss
->channel
->center_freq
,
3070 ht_cfreq
, ht_oper
->primary_chan
,
3071 cbss
->channel
->band
);
3077 channel_type
= NL80211_CHAN_HT20
;
3079 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3080 switch (ht_oper
->ht_param
&
3081 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3082 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3083 channel_type
= NL80211_CHAN_HT40PLUS
;
3085 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3086 channel_type
= NL80211_CHAN_HT40MINUS
;
3092 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3093 /* can only fail due to HT40+/- mismatch */
3094 channel_type
= NL80211_CHAN_HT20
;
3095 pr_debug("%s: disabling 40 MHz due to multi-vif mismatch\n",
3097 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3098 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3102 local
->oper_channel
= cbss
->channel
;
3103 ieee80211_hw_config(local
, 0);
3106 u32 rates
= 0, basic_rates
= 0;
3107 bool have_higher_than_11mbit
;
3108 int min_rate
= INT_MAX
, min_rate_index
= -1;
3110 ieee80211_get_rates(sband
, bss
->supp_rates
,
3111 bss
->supp_rates_len
,
3112 &rates
, &basic_rates
,
3113 &have_higher_than_11mbit
,
3114 &min_rate
, &min_rate_index
);
3117 * This used to be a workaround for basic rates missing
3118 * in the association response frame. Now that we no
3119 * longer use the basic rates from there, it probably
3120 * doesn't happen any more, but keep the workaround so
3121 * in case some *other* APs are buggy in different ways
3122 * we can connect -- with a warning.
3124 if (!basic_rates
&& min_rate_index
>= 0) {
3125 pr_debug("%s: No basic rates, using min rate instead\n",
3127 basic_rates
= BIT(min_rate_index
);
3130 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3131 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3133 /* cf. IEEE 802.11 9.2.12 */
3134 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3135 have_higher_than_11mbit
)
3136 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3138 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3140 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3142 /* tell driver about BSSID and basic rates */
3143 ieee80211_bss_info_change_notify(sdata
,
3144 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3147 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3149 err
= sta_info_insert(sta
);
3152 pr_debug("%s: failed to insert STA entry for the AP (error %d)\n",
3157 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3163 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3164 struct cfg80211_auth_request
*req
)
3166 struct ieee80211_local
*local
= sdata
->local
;
3167 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3168 struct ieee80211_mgd_auth_data
*auth_data
;
3172 /* prepare auth data structure */
3174 switch (req
->auth_type
) {
3175 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3176 auth_alg
= WLAN_AUTH_OPEN
;
3178 case NL80211_AUTHTYPE_SHARED_KEY
:
3179 if (IS_ERR(local
->wep_tx_tfm
))
3181 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3183 case NL80211_AUTHTYPE_FT
:
3184 auth_alg
= WLAN_AUTH_FT
;
3186 case NL80211_AUTHTYPE_NETWORK_EAP
:
3187 auth_alg
= WLAN_AUTH_LEAP
;
3193 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3197 auth_data
->bss
= req
->bss
;
3199 if (req
->ie
&& req
->ie_len
) {
3200 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3201 auth_data
->ie_len
= req
->ie_len
;
3204 if (req
->key
&& req
->key_len
) {
3205 auth_data
->key_len
= req
->key_len
;
3206 auth_data
->key_idx
= req
->key_idx
;
3207 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3210 auth_data
->algorithm
= auth_alg
;
3212 /* try to authenticate/probe */
3214 mutex_lock(&ifmgd
->mtx
);
3216 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3217 ifmgd
->assoc_data
) {
3222 if (ifmgd
->auth_data
)
3223 ieee80211_destroy_auth_data(sdata
, false);
3225 /* prep auth_data so we don't go into idle on disassoc */
3226 ifmgd
->auth_data
= auth_data
;
3228 if (ifmgd
->associated
)
3229 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3231 pr_debug("%s: authenticate with %pM\n", sdata
->name
, req
->bss
->bssid
);
3233 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3237 err
= ieee80211_probe_auth(sdata
);
3239 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3243 /* hold our own reference */
3244 cfg80211_ref_bss(auth_data
->bss
);
3249 ifmgd
->auth_data
= NULL
;
3253 mutex_unlock(&ifmgd
->mtx
);
3258 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3259 struct cfg80211_assoc_request
*req
)
3261 struct ieee80211_local
*local
= sdata
->local
;
3262 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3263 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3264 struct ieee80211_mgd_assoc_data
*assoc_data
;
3265 struct ieee80211_supported_band
*sband
;
3266 const u8
*ssidie
, *ht_ie
;
3269 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3273 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3277 mutex_lock(&ifmgd
->mtx
);
3279 if (ifmgd
->associated
)
3280 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3282 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3287 if (ifmgd
->assoc_data
) {
3292 if (ifmgd
->auth_data
) {
3295 /* keep sta info, bssid if matching */
3296 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3297 ieee80211_destroy_auth_data(sdata
, match
);
3300 /* prepare assoc data */
3302 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3303 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3305 ifmgd
->beacon_crc_valid
= false;
3308 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3309 * We still associate in non-HT mode (11a/b/g) if any one of these
3310 * ciphers is configured as pairwise.
3311 * We can set this to true for non-11n hardware, that'll be checked
3312 * separately along with the peer capabilities.
3314 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3315 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3316 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3317 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3318 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3319 netdev_info(sdata
->dev
,
3320 "disabling HT due to WEP/TKIP use\n");
3324 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3325 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3327 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3328 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3329 if (!sband
->ht_cap
.ht_supported
||
3330 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3331 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3332 netdev_info(sdata
->dev
,
3333 "disabling HT as WMM/QoS is not supported\n");
3336 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3337 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3338 sizeof(ifmgd
->ht_capa_mask
));
3340 if (req
->ie
&& req
->ie_len
) {
3341 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3342 assoc_data
->ie_len
= req
->ie_len
;
3345 assoc_data
->bss
= req
->bss
;
3347 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3348 if (ifmgd
->powersave
)
3349 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3351 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3353 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3355 assoc_data
->capability
= req
->bss
->capability
;
3356 assoc_data
->wmm
= bss
->wmm_used
&&
3357 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3358 assoc_data
->supp_rates
= bss
->supp_rates
;
3359 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3361 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3362 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3363 assoc_data
->ap_ht_param
=
3364 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3366 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3368 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3369 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3370 assoc_data
->uapsd
= true;
3371 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3373 assoc_data
->uapsd
= false;
3374 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3377 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3378 assoc_data
->ssid_len
= ssidie
[1];
3380 if (req
->prev_bssid
)
3381 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3384 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3385 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3387 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3388 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3391 if (req
->crypto
.control_port
)
3392 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3394 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3396 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3397 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3399 /* kick off associate process */
3401 ifmgd
->assoc_data
= assoc_data
;
3403 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3407 if (!bss
->dtim_period
&&
3408 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3410 * Wait up to one beacon interval ...
3411 * should this be more if we miss one?
3413 pr_debug("%s: waiting for beacon from %pM\n",
3414 sdata
->name
, ifmgd
->bssid
);
3415 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3417 assoc_data
->have_beacon
= true;
3418 assoc_data
->sent_assoc
= false;
3419 assoc_data
->timeout
= jiffies
;
3421 run_again(ifmgd
, assoc_data
->timeout
);
3423 if (bss
->corrupt_data
) {
3424 char *corrupt_type
= "data";
3425 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3426 if (bss
->corrupt_data
&
3427 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3428 corrupt_type
= "beacon and probe response";
3430 corrupt_type
= "beacon";
3431 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3432 corrupt_type
= "probe response";
3433 pr_debug("%s: associating with AP with corrupt %s\n",
3434 sdata
->name
, corrupt_type
);
3440 ifmgd
->assoc_data
= NULL
;
3444 mutex_unlock(&ifmgd
->mtx
);
3449 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3450 struct cfg80211_deauth_request
*req
)
3452 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3453 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3455 mutex_lock(&ifmgd
->mtx
);
3457 if (ifmgd
->auth_data
) {
3458 ieee80211_destroy_auth_data(sdata
, false);
3459 mutex_unlock(&ifmgd
->mtx
);
3463 pr_debug("%s: deauthenticating from %pM by local choice (reason=%d)\n",
3464 sdata
->name
, req
->bssid
, req
->reason_code
);
3466 if (ifmgd
->associated
&&
3467 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3468 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3469 req
->reason_code
, true, frame_buf
);
3471 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3472 IEEE80211_STYPE_DEAUTH
,
3473 req
->reason_code
, true,
3475 mutex_unlock(&ifmgd
->mtx
);
3477 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3479 mutex_lock(&sdata
->local
->mtx
);
3480 ieee80211_recalc_idle(sdata
->local
);
3481 mutex_unlock(&sdata
->local
->mtx
);
3486 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3487 struct cfg80211_disassoc_request
*req
)
3489 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3491 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3493 mutex_lock(&ifmgd
->mtx
);
3496 * cfg80211 should catch this ... but it's racy since
3497 * we can receive a disassoc frame, process it, hand it
3498 * to cfg80211 while that's in a locked section already
3499 * trying to tell us that the user wants to disconnect.
3501 if (ifmgd
->associated
!= req
->bss
) {
3502 mutex_unlock(&ifmgd
->mtx
);
3506 pr_debug("%s: disassociating from %pM by local choice (reason=%d)\n",
3507 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3509 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3510 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3511 req
->reason_code
, !req
->local_state_change
,
3513 mutex_unlock(&ifmgd
->mtx
);
3515 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3517 mutex_lock(&sdata
->local
->mtx
);
3518 ieee80211_recalc_idle(sdata
->local
);
3519 mutex_unlock(&sdata
->local
->mtx
);
3524 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3526 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3528 mutex_lock(&ifmgd
->mtx
);
3529 if (ifmgd
->assoc_data
)
3530 ieee80211_destroy_assoc_data(sdata
, false);
3531 if (ifmgd
->auth_data
)
3532 ieee80211_destroy_auth_data(sdata
, false);
3533 del_timer_sync(&ifmgd
->timer
);
3534 mutex_unlock(&ifmgd
->mtx
);
3537 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3538 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3541 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3543 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3545 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3547 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);