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
->flags
& (IEEE80211_STA_BEACON_POLL
|
906 IEEE80211_STA_CONNECTION_POLL
))
910 sta
= sta_info_get(sdata
, mgd
->bssid
);
912 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
918 /* need to hold RTNL or interface lock */
919 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
921 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
925 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
926 local
->ps_sdata
= NULL
;
930 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
931 if (!ieee80211_sdata_running(sdata
))
933 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
934 /* If an AP vif is found, then disable PS
935 * by setting the count to zero thereby setting
941 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
947 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
948 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
952 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
954 beaconint_us
= ieee80211_tu_to_usec(
955 found
->vif
.bss_conf
.beacon_int
);
957 timeout
= local
->dynamic_ps_forced_timeout
;
960 * Go to full PSM if the user configures a very low
961 * latency requirement.
962 * The 2000 second value is there for compatibility
963 * until the PM_QOS_NETWORK_LATENCY is configured
966 if (latency
> (1900 * USEC_PER_MSEC
) &&
967 latency
!= (2000 * USEC_PER_SEC
))
972 local
->dynamic_ps_user_timeout
= timeout
;
973 if (!local
->disable_dynamic_ps
)
974 conf
->dynamic_ps_timeout
=
975 local
->dynamic_ps_user_timeout
;
977 if (beaconint_us
> latency
) {
978 local
->ps_sdata
= NULL
;
980 struct ieee80211_bss
*bss
;
984 bss
= (void *)found
->u
.mgd
.associated
->priv
;
985 dtimper
= bss
->dtim_period
;
987 /* If the TIM IE is invalid, pretend the value is 1 */
990 else if (dtimper
> 1)
991 maxslp
= min_t(int, dtimper
,
992 latency
/ beaconint_us
);
994 local
->hw
.conf
.max_sleep_period
= maxslp
;
995 local
->hw
.conf
.ps_dtim_period
= dtimper
;
996 local
->ps_sdata
= found
;
999 local
->ps_sdata
= NULL
;
1002 ieee80211_change_ps(local
);
1005 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1007 struct ieee80211_local
*local
=
1008 container_of(work
, struct ieee80211_local
,
1009 dynamic_ps_disable_work
);
1011 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1012 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1013 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1016 ieee80211_wake_queues_by_reason(&local
->hw
,
1017 IEEE80211_QUEUE_STOP_REASON_PS
);
1020 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1022 struct ieee80211_local
*local
=
1023 container_of(work
, struct ieee80211_local
,
1024 dynamic_ps_enable_work
);
1025 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1026 struct ieee80211_if_managed
*ifmgd
;
1027 unsigned long flags
;
1030 /* can only happen when PS was just disabled anyway */
1034 ifmgd
= &sdata
->u
.mgd
;
1036 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1039 if (!local
->disable_dynamic_ps
&&
1040 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1041 /* don't enter PS if TX frames are pending */
1042 if (drv_tx_frames_pending(local
)) {
1043 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1045 local
->hw
.conf
.dynamic_ps_timeout
));
1050 * transmission can be stopped by others which leads to
1051 * dynamic_ps_timer expiry. Postpone the ps timer if it
1052 * is not the actual idle state.
1054 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1055 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1056 if (local
->queue_stop_reasons
[q
]) {
1057 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1059 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1061 local
->hw
.conf
.dynamic_ps_timeout
));
1065 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1068 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1069 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1070 netif_tx_stop_all_queues(sdata
->dev
);
1072 if (drv_tx_frames_pending(local
))
1073 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1075 local
->hw
.conf
.dynamic_ps_timeout
));
1077 ieee80211_send_nullfunc(local
, sdata
, 1);
1078 /* Flush to get the tx status of nullfunc frame */
1079 drv_flush(local
, false);
1083 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1084 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1085 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1086 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1087 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1088 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1091 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1092 netif_tx_wake_all_queues(sdata
->dev
);
1095 void ieee80211_dynamic_ps_timer(unsigned long data
)
1097 struct ieee80211_local
*local
= (void *) data
;
1099 if (local
->quiescing
|| local
->suspended
)
1102 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1106 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1107 struct ieee80211_sub_if_data
*sdata
,
1108 u8
*wmm_param
, size_t wmm_param_len
)
1110 struct ieee80211_tx_queue_params params
;
1111 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1114 u8
*pos
, uapsd_queues
= 0;
1116 if (!local
->ops
->conf_tx
)
1119 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1125 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1128 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1129 uapsd_queues
= ifmgd
->uapsd_queues
;
1131 count
= wmm_param
[6] & 0x0f;
1132 if (count
== ifmgd
->wmm_last_param_set
)
1134 ifmgd
->wmm_last_param_set
= count
;
1136 pos
= wmm_param
+ 8;
1137 left
= wmm_param_len
- 8;
1139 memset(¶ms
, 0, sizeof(params
));
1142 for (; left
>= 4; left
-= 4, pos
+= 4) {
1143 int aci
= (pos
[0] >> 5) & 0x03;
1144 int acm
= (pos
[0] >> 4) & 0x01;
1152 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1153 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1159 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1160 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1166 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1167 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1174 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1175 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1180 params
.aifs
= pos
[0] & 0x0f;
1181 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1182 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1183 params
.txop
= get_unaligned_le16(pos
+ 2);
1184 params
.uapsd
= uapsd
;
1187 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1189 params
.aifs
, params
.cw_min
, params
.cw_max
,
1190 params
.txop
, params
.uapsd
);
1191 sdata
->tx_conf
[queue
] = params
;
1192 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1194 "failed to set TX queue parameters for queue %d\n",
1198 /* enable WMM or activate new settings */
1199 sdata
->vif
.bss_conf
.qos
= true;
1202 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1204 lockdep_assert_held(&sdata
->local
->mtx
);
1206 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1207 IEEE80211_STA_BEACON_POLL
);
1208 ieee80211_run_deferred_scan(sdata
->local
);
1211 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1213 mutex_lock(&sdata
->local
->mtx
);
1214 __ieee80211_stop_poll(sdata
);
1215 mutex_unlock(&sdata
->local
->mtx
);
1218 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1219 u16 capab
, bool erp_valid
, u8 erp
)
1221 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1223 bool use_protection
;
1224 bool use_short_preamble
;
1225 bool use_short_slot
;
1228 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1229 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1231 use_protection
= false;
1232 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1235 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1236 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1237 use_short_slot
= true;
1239 if (use_protection
!= bss_conf
->use_cts_prot
) {
1240 bss_conf
->use_cts_prot
= use_protection
;
1241 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1244 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1245 bss_conf
->use_short_preamble
= use_short_preamble
;
1246 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1249 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1250 bss_conf
->use_short_slot
= use_short_slot
;
1251 changed
|= BSS_CHANGED_ERP_SLOT
;
1257 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1258 struct cfg80211_bss
*cbss
,
1259 u32 bss_info_changed
)
1261 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1262 struct ieee80211_local
*local
= sdata
->local
;
1263 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1265 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1266 /* set timing information */
1267 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1268 bss_conf
->last_tsf
= cbss
->tsf
;
1270 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1271 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1272 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1274 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1275 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1277 sdata
->u
.mgd
.associated
= cbss
;
1278 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1280 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1282 /* just to be sure */
1283 ieee80211_stop_poll(sdata
);
1285 ieee80211_led_assoc(local
, 1);
1287 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1288 bss_conf
->dtim_period
= bss
->dtim_period
;
1290 bss_conf
->dtim_period
= 0;
1292 bss_conf
->assoc
= 1;
1294 /* Tell the driver to monitor connection quality (if supported) */
1295 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1296 bss_conf
->cqm_rssi_thold
)
1297 bss_info_changed
|= BSS_CHANGED_CQM
;
1299 /* Enable ARP filtering */
1300 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1301 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1302 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1305 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1307 mutex_lock(&local
->iflist_mtx
);
1308 ieee80211_recalc_ps(local
, -1);
1309 ieee80211_recalc_smps(local
);
1310 mutex_unlock(&local
->iflist_mtx
);
1312 netif_tx_start_all_queues(sdata
->dev
);
1313 netif_carrier_on(sdata
->dev
);
1316 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1317 u16 stype
, u16 reason
, bool tx
,
1320 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1321 struct ieee80211_local
*local
= sdata
->local
;
1322 struct sta_info
*sta
;
1326 ASSERT_MGD_MTX(ifmgd
);
1328 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1331 if (WARN_ON(!ifmgd
->associated
))
1334 ieee80211_stop_poll(sdata
);
1336 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1338 ifmgd
->associated
= NULL
;
1339 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1342 * we need to commit the associated = NULL change because the
1343 * scan code uses that to determine whether this iface should
1344 * go to/wake up from powersave or not -- and could otherwise
1345 * wake the queues erroneously.
1350 * Thus, we can only afterwards stop the queues -- to account
1351 * for the case where another CPU is finishing a scan at this
1352 * time -- we don't want the scan code to enable queues.
1355 netif_tx_stop_all_queues(sdata
->dev
);
1356 netif_carrier_off(sdata
->dev
);
1358 mutex_lock(&local
->sta_mtx
);
1359 sta
= sta_info_get(sdata
, bssid
);
1361 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1362 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1364 mutex_unlock(&local
->sta_mtx
);
1366 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1368 drv_flush(local
, false);
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
);
1569 mlme_dbg_ratelimited(sdata
,
1570 "detected beacon loss from AP - sending probe request\n");
1572 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1573 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1586 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1587 IEEE80211_STA_CONNECTION_POLL
))
1591 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1593 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1595 mutex_unlock(&sdata
->local
->mtx
);
1600 mutex_lock(&sdata
->local
->iflist_mtx
);
1601 ieee80211_recalc_ps(sdata
->local
, -1);
1602 mutex_unlock(&sdata
->local
->iflist_mtx
);
1604 ifmgd
->probe_send_count
= 0;
1605 ieee80211_mgd_probe_ap_send(sdata
);
1607 mutex_unlock(&ifmgd
->mtx
);
1610 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1611 struct ieee80211_vif
*vif
)
1613 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1614 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1615 struct cfg80211_bss
*cbss
;
1616 struct sk_buff
*skb
;
1620 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1623 ASSERT_MGD_MTX(ifmgd
);
1625 if (ifmgd
->associated
)
1626 cbss
= ifmgd
->associated
;
1627 else if (ifmgd
->auth_data
)
1628 cbss
= ifmgd
->auth_data
->bss
;
1629 else if (ifmgd
->assoc_data
)
1630 cbss
= ifmgd
->assoc_data
->bss
;
1634 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1635 if (WARN_ON_ONCE(ssid
== NULL
))
1640 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1641 (u32
) -1, ssid
+ 2, ssid_len
,
1646 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1648 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1650 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1651 struct ieee80211_local
*local
= sdata
->local
;
1653 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1655 mutex_lock(&ifmgd
->mtx
);
1656 if (!ifmgd
->associated
) {
1657 mutex_unlock(&ifmgd
->mtx
);
1661 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1663 sdata_info(sdata
, "Connection to AP %pM lost\n", bssid
);
1665 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1666 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1668 mutex_unlock(&ifmgd
->mtx
);
1671 * must be outside lock due to cfg80211,
1672 * but that's not a problem.
1674 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1676 mutex_lock(&local
->mtx
);
1677 ieee80211_recalc_idle(local
);
1678 mutex_unlock(&local
->mtx
);
1681 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1683 struct ieee80211_sub_if_data
*sdata
=
1684 container_of(work
, struct ieee80211_sub_if_data
,
1685 u
.mgd
.beacon_connection_loss_work
);
1686 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1687 struct sta_info
*sta
;
1689 if (ifmgd
->associated
) {
1691 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1693 sta
->beacon_loss_count
++;
1697 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1698 __ieee80211_connection_loss(sdata
);
1700 ieee80211_mgd_probe_ap(sdata
, true);
1703 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1705 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1706 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1708 trace_api_beacon_loss(sdata
);
1710 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1711 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1713 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1715 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1717 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1718 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1720 trace_api_connection_loss(sdata
);
1722 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1723 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1725 EXPORT_SYMBOL(ieee80211_connection_loss
);
1728 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1731 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1733 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1736 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1738 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1739 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1742 cfg80211_put_bss(auth_data
->bss
);
1744 sdata
->u
.mgd
.auth_data
= NULL
;
1747 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1748 struct ieee80211_mgmt
*mgmt
, size_t len
)
1750 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1752 struct ieee802_11_elems elems
;
1754 pos
= mgmt
->u
.auth
.variable
;
1755 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1756 if (!elems
.challenge
)
1758 auth_data
->expected_transaction
= 4;
1759 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1760 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1761 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1762 auth_data
->key
, auth_data
->key_len
,
1763 auth_data
->key_idx
);
1766 static enum rx_mgmt_action __must_check
1767 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1768 struct ieee80211_mgmt
*mgmt
, size_t len
)
1770 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1772 u16 auth_alg
, auth_transaction
, status_code
;
1773 struct sta_info
*sta
;
1775 lockdep_assert_held(&ifmgd
->mtx
);
1778 return RX_MGMT_NONE
;
1780 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1781 return RX_MGMT_NONE
;
1783 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1785 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1786 return RX_MGMT_NONE
;
1788 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1789 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1790 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1792 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1793 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1794 return RX_MGMT_NONE
;
1796 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1797 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1798 mgmt
->sa
, status_code
);
1799 ieee80211_destroy_auth_data(sdata
, false);
1800 return RX_MGMT_CFG80211_RX_AUTH
;
1803 switch (ifmgd
->auth_data
->algorithm
) {
1804 case WLAN_AUTH_OPEN
:
1805 case WLAN_AUTH_LEAP
:
1808 case WLAN_AUTH_SHARED_KEY
:
1809 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1810 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1811 /* need another frame */
1812 return RX_MGMT_NONE
;
1816 WARN_ONCE(1, "invalid auth alg %d",
1817 ifmgd
->auth_data
->algorithm
);
1818 return RX_MGMT_NONE
;
1821 sdata_info(sdata
, "authenticated\n");
1822 ifmgd
->auth_data
->done
= true;
1823 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1824 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1826 /* move station state to auth */
1827 mutex_lock(&sdata
->local
->sta_mtx
);
1828 sta
= sta_info_get(sdata
, bssid
);
1830 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1833 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1834 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
1837 mutex_unlock(&sdata
->local
->sta_mtx
);
1839 return RX_MGMT_CFG80211_RX_AUTH
;
1841 mutex_unlock(&sdata
->local
->sta_mtx
);
1842 /* ignore frame -- wait for timeout */
1843 return RX_MGMT_NONE
;
1847 static enum rx_mgmt_action __must_check
1848 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1849 struct ieee80211_mgmt
*mgmt
, size_t len
)
1851 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1852 const u8
*bssid
= NULL
;
1855 lockdep_assert_held(&ifmgd
->mtx
);
1858 return RX_MGMT_NONE
;
1860 if (!ifmgd
->associated
||
1861 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1862 return RX_MGMT_NONE
;
1864 bssid
= ifmgd
->associated
->bssid
;
1866 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1868 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
1869 bssid
, reason_code
);
1871 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1873 mutex_lock(&sdata
->local
->mtx
);
1874 ieee80211_recalc_idle(sdata
->local
);
1875 mutex_unlock(&sdata
->local
->mtx
);
1877 return RX_MGMT_CFG80211_DEAUTH
;
1881 static enum rx_mgmt_action __must_check
1882 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1883 struct ieee80211_mgmt
*mgmt
, size_t len
)
1885 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1888 lockdep_assert_held(&ifmgd
->mtx
);
1891 return RX_MGMT_NONE
;
1893 if (!ifmgd
->associated
||
1894 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1895 return RX_MGMT_NONE
;
1897 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1899 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
1900 mgmt
->sa
, reason_code
);
1902 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1904 mutex_lock(&sdata
->local
->mtx
);
1905 ieee80211_recalc_idle(sdata
->local
);
1906 mutex_unlock(&sdata
->local
->mtx
);
1908 return RX_MGMT_CFG80211_DISASSOC
;
1911 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1912 u8
*supp_rates
, unsigned int supp_rates_len
,
1913 u32
*rates
, u32
*basic_rates
,
1914 bool *have_higher_than_11mbit
,
1915 int *min_rate
, int *min_rate_index
)
1919 for (i
= 0; i
< supp_rates_len
; i
++) {
1920 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1921 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1924 *have_higher_than_11mbit
= true;
1927 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1928 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1930 * Note: Even through the membership selector and the basic
1931 * rate flag share the same bit, they are not exactly
1934 if (!!(supp_rates
[i
] & 0x80) &&
1935 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1938 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1939 if (sband
->bitrates
[j
].bitrate
== rate
) {
1942 *basic_rates
|= BIT(j
);
1943 if (rate
< *min_rate
) {
1945 *min_rate_index
= j
;
1953 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1956 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1958 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1961 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1963 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1964 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1968 sdata
->u
.mgd
.assoc_data
= NULL
;
1971 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1972 struct cfg80211_bss
*cbss
,
1973 struct ieee80211_mgmt
*mgmt
, size_t len
)
1975 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1976 struct ieee80211_local
*local
= sdata
->local
;
1977 struct ieee80211_supported_band
*sband
;
1978 struct sta_info
*sta
;
1980 u16 capab_info
, aid
;
1981 struct ieee802_11_elems elems
;
1982 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1986 /* AssocResp and ReassocResp have identical structure */
1988 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1989 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1991 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1992 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
1994 aid
&= ~(BIT(15) | BIT(14));
1996 ifmgd
->broken_ap
= false;
1998 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1999 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2002 ifmgd
->broken_ap
= true;
2005 pos
= mgmt
->u
.assoc_resp
.variable
;
2006 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2008 if (!elems
.supp_rates
) {
2009 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2015 mutex_lock(&sdata
->local
->sta_mtx
);
2017 * station info was already allocated and inserted before
2018 * the association and should be available to us
2020 sta
= sta_info_get(sdata
, cbss
->bssid
);
2021 if (WARN_ON(!sta
)) {
2022 mutex_unlock(&sdata
->local
->sta_mtx
);
2026 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2028 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2029 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2030 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2032 sta
->supports_40mhz
=
2033 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2035 rate_control_rate_init(sta
);
2037 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2038 set_sta_flag(sta
, WLAN_STA_MFP
);
2040 if (elems
.wmm_param
)
2041 set_sta_flag(sta
, WLAN_STA_WME
);
2043 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2045 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2046 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2047 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2050 "failed to move station %pM to desired state\n",
2052 WARN_ON(__sta_info_destroy(sta
));
2053 mutex_unlock(&sdata
->local
->sta_mtx
);
2057 mutex_unlock(&sdata
->local
->sta_mtx
);
2060 * Always handle WMM once after association regardless
2061 * of the first value the AP uses. Setting -1 here has
2062 * that effect because the AP values is an unsigned
2065 ifmgd
->wmm_last_param_set
= -1;
2067 if (elems
.wmm_param
)
2068 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2069 elems
.wmm_param_len
);
2071 ieee80211_set_wmm_default(sdata
, false);
2072 changed
|= BSS_CHANGED_QOS
;
2074 if (elems
.ht_operation
&& elems
.wmm_param
&&
2075 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2076 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2077 cbss
->bssid
, false);
2079 /* set AID and assoc capability,
2080 * ieee80211_set_associated() will tell the driver */
2081 bss_conf
->aid
= aid
;
2082 bss_conf
->assoc_capability
= capab_info
;
2083 ieee80211_set_associated(sdata
, cbss
, changed
);
2086 * If we're using 4-addr mode, let the AP know that we're
2087 * doing so, so that it can create the STA VLAN on its side
2089 if (ifmgd
->use_4addr
)
2090 ieee80211_send_4addr_nullfunc(local
, sdata
);
2093 * Start timer to probe the connection to the AP now.
2094 * Also start the timer that will detect beacon loss.
2096 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2097 ieee80211_sta_reset_beacon_monitor(sdata
);
2102 static enum rx_mgmt_action __must_check
2103 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2104 struct ieee80211_mgmt
*mgmt
, size_t len
,
2105 struct cfg80211_bss
**bss
)
2107 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2108 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2109 u16 capab_info
, status_code
, aid
;
2110 struct ieee802_11_elems elems
;
2114 lockdep_assert_held(&ifmgd
->mtx
);
2117 return RX_MGMT_NONE
;
2118 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2119 return RX_MGMT_NONE
;
2122 * AssocResp and ReassocResp have identical structure, so process both
2123 * of them in this function.
2127 return RX_MGMT_NONE
;
2129 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2130 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2131 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2132 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2135 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2136 reassoc
? "Rea" : "A", mgmt
->sa
,
2137 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2139 pos
= mgmt
->u
.assoc_resp
.variable
;
2140 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2142 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2143 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2144 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2146 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2147 ms
= tu
* 1024 / 1000;
2149 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2151 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2152 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2153 run_again(ifmgd
, assoc_data
->timeout
);
2154 return RX_MGMT_NONE
;
2157 *bss
= assoc_data
->bss
;
2159 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2160 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2161 mgmt
->sa
, status_code
);
2162 ieee80211_destroy_assoc_data(sdata
, false);
2164 sdata_info(sdata
, "associated\n");
2166 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2167 /* oops -- internal error -- send timeout for now */
2168 ieee80211_destroy_assoc_data(sdata
, true);
2169 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2170 cfg80211_put_bss(*bss
);
2171 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2175 * destroy assoc_data afterwards, as otherwise an idle
2176 * recalc after assoc_data is NULL but before associated
2177 * is set can cause the interface to go idle
2179 ieee80211_destroy_assoc_data(sdata
, true);
2182 return RX_MGMT_CFG80211_RX_ASSOC
;
2184 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2185 struct ieee80211_mgmt
*mgmt
,
2187 struct ieee80211_rx_status
*rx_status
,
2188 struct ieee802_11_elems
*elems
,
2191 struct ieee80211_local
*local
= sdata
->local
;
2193 struct ieee80211_bss
*bss
;
2194 struct ieee80211_channel
*channel
;
2195 bool need_ps
= false;
2197 if (sdata
->u
.mgd
.associated
&&
2198 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2199 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2200 /* not previously set so we may need to recalc */
2201 need_ps
= !bss
->dtim_period
;
2204 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2205 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2208 freq
= rx_status
->freq
;
2210 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2212 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2215 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2218 ieee80211_rx_bss_put(local
, bss
);
2220 if (!sdata
->u
.mgd
.associated
)
2224 mutex_lock(&local
->iflist_mtx
);
2225 ieee80211_recalc_ps(local
, -1);
2226 mutex_unlock(&local
->iflist_mtx
);
2229 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2230 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2232 struct ieee80211_channel_sw_ie
*sw_elem
=
2233 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2234 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2235 bss
, rx_status
->mactime
);
2240 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2241 struct sk_buff
*skb
)
2243 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2244 struct ieee80211_if_managed
*ifmgd
;
2245 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2246 size_t baselen
, len
= skb
->len
;
2247 struct ieee802_11_elems elems
;
2249 ifmgd
= &sdata
->u
.mgd
;
2251 ASSERT_MGD_MTX(ifmgd
);
2253 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2254 return; /* ignore ProbeResp to foreign address */
2256 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2260 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2263 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2265 if (ifmgd
->associated
&&
2266 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2267 ieee80211_reset_ap_probe(sdata
);
2269 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2270 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2271 /* got probe response, continue with auth */
2272 sdata_info(sdata
, "direct probe responded\n");
2273 ifmgd
->auth_data
->tries
= 0;
2274 ifmgd
->auth_data
->timeout
= jiffies
;
2275 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2280 * This is the canonical list of information elements we care about,
2281 * the filter code also gives us all changes to the Microsoft OUI
2282 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2284 * We implement beacon filtering in software since that means we can
2285 * avoid processing the frame here and in cfg80211, and userspace
2286 * will not be able to tell whether the hardware supports it or not.
2288 * XXX: This list needs to be dynamic -- userspace needs to be able to
2289 * add items it requires. It also needs to be able to tell us to
2290 * look out for other vendor IEs.
2292 static const u64 care_about_ies
=
2293 (1ULL << WLAN_EID_COUNTRY
) |
2294 (1ULL << WLAN_EID_ERP_INFO
) |
2295 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2296 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2297 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2298 (1ULL << WLAN_EID_HT_OPERATION
);
2300 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2301 struct ieee80211_mgmt
*mgmt
,
2303 struct ieee80211_rx_status
*rx_status
)
2305 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2306 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2308 struct ieee802_11_elems elems
;
2309 struct ieee80211_local
*local
= sdata
->local
;
2311 bool erp_valid
, directed_tim
= false;
2316 lockdep_assert_held(&ifmgd
->mtx
);
2318 /* Process beacon from the current BSS */
2319 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2323 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2326 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2327 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2328 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2329 len
- baselen
, &elems
);
2331 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2333 ifmgd
->assoc_data
->have_beacon
= true;
2334 ifmgd
->assoc_data
->sent_assoc
= false;
2335 /* continue assoc process */
2336 ifmgd
->assoc_data
->timeout
= jiffies
;
2337 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2341 if (!ifmgd
->associated
||
2342 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2344 bssid
= ifmgd
->associated
->bssid
;
2346 /* Track average RSSI from the Beacon frames of the current AP */
2347 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2348 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2349 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2350 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2351 ifmgd
->last_cqm_event_signal
= 0;
2352 ifmgd
->count_beacon_signal
= 1;
2353 ifmgd
->last_ave_beacon_signal
= 0;
2355 ifmgd
->ave_beacon_signal
=
2356 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2357 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2358 ifmgd
->ave_beacon_signal
) / 16;
2359 ifmgd
->count_beacon_signal
++;
2362 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2363 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2364 int sig
= ifmgd
->ave_beacon_signal
;
2365 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2368 * if signal crosses either of the boundaries, invoke callback
2369 * with appropriate parameters
2371 if (sig
> ifmgd
->rssi_max_thold
&&
2372 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2373 ifmgd
->last_ave_beacon_signal
= sig
;
2374 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2375 } else if (sig
< ifmgd
->rssi_min_thold
&&
2376 (last_sig
>= ifmgd
->rssi_max_thold
||
2378 ifmgd
->last_ave_beacon_signal
= sig
;
2379 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2383 if (bss_conf
->cqm_rssi_thold
&&
2384 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2385 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2386 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2387 int last_event
= ifmgd
->last_cqm_event_signal
;
2388 int thold
= bss_conf
->cqm_rssi_thold
;
2389 int hyst
= bss_conf
->cqm_rssi_hyst
;
2391 (last_event
== 0 || sig
< last_event
- hyst
)) {
2392 ifmgd
->last_cqm_event_signal
= sig
;
2393 ieee80211_cqm_rssi_notify(
2395 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2397 } else if (sig
> thold
&&
2398 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2399 ifmgd
->last_cqm_event_signal
= sig
;
2400 ieee80211_cqm_rssi_notify(
2402 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2407 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2408 mlme_dbg_ratelimited(sdata
,
2409 "cancelling probereq poll due to a received beacon\n");
2410 mutex_lock(&local
->mtx
);
2411 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2412 ieee80211_run_deferred_scan(local
);
2413 mutex_unlock(&local
->mtx
);
2415 mutex_lock(&local
->iflist_mtx
);
2416 ieee80211_recalc_ps(local
, -1);
2417 mutex_unlock(&local
->iflist_mtx
);
2421 * Push the beacon loss detection into the future since
2422 * we are processing a beacon from the AP just now.
2424 ieee80211_sta_reset_beacon_monitor(sdata
);
2426 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2427 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2428 len
- baselen
, &elems
,
2429 care_about_ies
, ncrc
);
2431 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2432 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2435 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2436 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2439 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2440 elems
.wmm_param_len
);
2443 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2445 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2446 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2447 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2448 ieee80211_hw_config(local
,
2449 IEEE80211_CONF_CHANGE_PS
);
2451 ieee80211_send_nullfunc(local
, sdata
, 0);
2452 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2453 local
->pspolling
= true;
2456 * Here is assumed that the driver will be
2457 * able to send ps-poll frame and receive a
2458 * response even though power save mode is
2459 * enabled, but some drivers might require
2460 * to disable power save here. This needs
2461 * to be investigated.
2463 ieee80211_send_pspoll(local
, sdata
);
2468 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2470 ifmgd
->beacon_crc
= ncrc
;
2471 ifmgd
->beacon_crc_valid
= true;
2473 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2475 erp_value
= elems
.erp_info
[0];
2479 changed
|= ieee80211_handle_bss_capability(sdata
,
2480 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2481 erp_valid
, erp_value
);
2484 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2485 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2486 struct ieee80211_supported_band
*sband
;
2488 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2490 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2494 /* Note: country IE parsing is done for us by cfg80211 */
2495 if (elems
.country_elem
) {
2496 /* TODO: IBSS also needs this */
2497 if (elems
.pwr_constr_elem
)
2498 ieee80211_handle_pwr_constr(sdata
,
2499 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2500 elems
.pwr_constr_elem
,
2501 elems
.pwr_constr_elem_len
);
2504 ieee80211_bss_info_change_notify(sdata
, changed
);
2507 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2508 struct sk_buff
*skb
)
2510 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2511 struct ieee80211_rx_status
*rx_status
;
2512 struct ieee80211_mgmt
*mgmt
;
2513 struct cfg80211_bss
*bss
= NULL
;
2514 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2517 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2518 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2519 fc
= le16_to_cpu(mgmt
->frame_control
);
2521 mutex_lock(&ifmgd
->mtx
);
2523 switch (fc
& IEEE80211_FCTL_STYPE
) {
2524 case IEEE80211_STYPE_BEACON
:
2525 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2527 case IEEE80211_STYPE_PROBE_RESP
:
2528 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2530 case IEEE80211_STYPE_AUTH
:
2531 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2533 case IEEE80211_STYPE_DEAUTH
:
2534 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2536 case IEEE80211_STYPE_DISASSOC
:
2537 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2539 case IEEE80211_STYPE_ASSOC_RESP
:
2540 case IEEE80211_STYPE_REASSOC_RESP
:
2541 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2543 case IEEE80211_STYPE_ACTION
:
2544 switch (mgmt
->u
.action
.category
) {
2545 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2546 ieee80211_sta_process_chanswitch(sdata
,
2547 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2548 (void *)ifmgd
->associated
->priv
,
2549 rx_status
->mactime
);
2553 mutex_unlock(&ifmgd
->mtx
);
2559 case RX_MGMT_CFG80211_DEAUTH
:
2560 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2562 case RX_MGMT_CFG80211_DISASSOC
:
2563 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2565 case RX_MGMT_CFG80211_RX_AUTH
:
2566 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2568 case RX_MGMT_CFG80211_RX_ASSOC
:
2569 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2571 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2572 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2575 WARN(1, "unexpected: %d", rma
);
2579 static void ieee80211_sta_timer(unsigned long data
)
2581 struct ieee80211_sub_if_data
*sdata
=
2582 (struct ieee80211_sub_if_data
*) data
;
2583 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2584 struct ieee80211_local
*local
= sdata
->local
;
2586 if (local
->quiescing
) {
2587 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2591 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2594 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2595 u8
*bssid
, u8 reason
)
2597 struct ieee80211_local
*local
= sdata
->local
;
2598 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2599 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2601 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2603 mutex_unlock(&ifmgd
->mtx
);
2606 * must be outside lock due to cfg80211,
2607 * but that's not a problem.
2609 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2611 mutex_lock(&local
->mtx
);
2612 ieee80211_recalc_idle(local
);
2613 mutex_unlock(&local
->mtx
);
2615 mutex_lock(&ifmgd
->mtx
);
2618 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2620 struct ieee80211_local
*local
= sdata
->local
;
2621 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2622 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2624 lockdep_assert_held(&ifmgd
->mtx
);
2626 if (WARN_ON_ONCE(!auth_data
))
2631 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2632 sdata_info(sdata
, "authentication with %pM timed out\n",
2633 auth_data
->bss
->bssid
);
2636 * Most likely AP is not in the range so remove the
2637 * bss struct for that AP.
2639 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2644 if (auth_data
->bss
->proberesp_ies
) {
2645 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2646 auth_data
->bss
->bssid
, auth_data
->tries
,
2647 IEEE80211_AUTH_MAX_TRIES
);
2649 auth_data
->expected_transaction
= 2;
2650 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2651 auth_data
->ie
, auth_data
->ie_len
,
2652 auth_data
->bss
->bssid
,
2653 auth_data
->bss
->bssid
, NULL
, 0, 0);
2657 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2658 auth_data
->bss
->bssid
, auth_data
->tries
,
2659 IEEE80211_AUTH_MAX_TRIES
);
2661 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2665 * Direct probe is sent to broadcast address as some APs
2666 * will not answer to direct packet in unassociated state.
2668 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2669 NULL
, 0, (u32
) -1, true, false);
2672 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2673 run_again(ifmgd
, auth_data
->timeout
);
2678 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2680 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2681 struct ieee80211_local
*local
= sdata
->local
;
2683 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2685 assoc_data
->tries
++;
2686 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2687 sdata_info(sdata
, "association with %pM timed out\n",
2688 assoc_data
->bss
->bssid
);
2691 * Most likely AP is not in the range so remove the
2692 * bss struct for that AP.
2694 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2699 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2700 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2701 IEEE80211_ASSOC_MAX_TRIES
);
2702 ieee80211_send_assoc(sdata
);
2704 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2705 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2710 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2712 struct ieee80211_local
*local
= sdata
->local
;
2713 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2715 mutex_lock(&ifmgd
->mtx
);
2717 if (ifmgd
->auth_data
&&
2718 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2719 if (ifmgd
->auth_data
->done
) {
2721 * ok ... we waited for assoc but userspace didn't,
2722 * so let's just kill the auth data
2724 ieee80211_destroy_auth_data(sdata
, false);
2725 } else if (ieee80211_probe_auth(sdata
)) {
2728 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2730 ieee80211_destroy_auth_data(sdata
, false);
2732 mutex_unlock(&ifmgd
->mtx
);
2733 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2734 mutex_lock(&ifmgd
->mtx
);
2736 } else if (ifmgd
->auth_data
)
2737 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2739 if (ifmgd
->assoc_data
&&
2740 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2741 if (!ifmgd
->assoc_data
->have_beacon
||
2742 ieee80211_do_assoc(sdata
)) {
2745 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2747 ieee80211_destroy_assoc_data(sdata
, false);
2749 mutex_unlock(&ifmgd
->mtx
);
2750 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2751 mutex_lock(&ifmgd
->mtx
);
2753 } else if (ifmgd
->assoc_data
)
2754 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2756 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2757 IEEE80211_STA_CONNECTION_POLL
) &&
2758 ifmgd
->associated
) {
2762 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2764 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2765 max_tries
= max_nullfunc_tries
;
2767 max_tries
= max_probe_tries
;
2769 /* ACK received for nullfunc probing frame */
2770 if (!ifmgd
->probe_send_count
)
2771 ieee80211_reset_ap_probe(sdata
);
2772 else if (ifmgd
->nullfunc_failed
) {
2773 if (ifmgd
->probe_send_count
< max_tries
) {
2775 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2776 bssid
, ifmgd
->probe_send_count
,
2778 ieee80211_mgd_probe_ap_send(sdata
);
2781 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2783 ieee80211_sta_connection_lost(sdata
, bssid
,
2784 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2786 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2787 run_again(ifmgd
, ifmgd
->probe_timeout
);
2788 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2790 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2791 bssid
, probe_wait_ms
);
2792 ieee80211_sta_connection_lost(sdata
, bssid
,
2793 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2794 } else if (ifmgd
->probe_send_count
< max_tries
) {
2796 "No probe response from AP %pM after %dms, try %d/%i\n",
2797 bssid
, probe_wait_ms
,
2798 ifmgd
->probe_send_count
, max_tries
);
2799 ieee80211_mgd_probe_ap_send(sdata
);
2802 * We actually lost the connection ... or did we?
2805 wiphy_debug(local
->hw
.wiphy
,
2806 "%s: No probe response from AP %pM"
2807 " after %dms, disconnecting.\n",
2809 bssid
, probe_wait_ms
);
2811 ieee80211_sta_connection_lost(sdata
, bssid
,
2812 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2816 mutex_unlock(&ifmgd
->mtx
);
2818 mutex_lock(&local
->mtx
);
2819 ieee80211_recalc_idle(local
);
2820 mutex_unlock(&local
->mtx
);
2823 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2825 struct ieee80211_sub_if_data
*sdata
=
2826 (struct ieee80211_sub_if_data
*) data
;
2827 struct ieee80211_local
*local
= sdata
->local
;
2829 if (local
->quiescing
)
2832 ieee80211_queue_work(&sdata
->local
->hw
,
2833 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2836 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2838 struct ieee80211_sub_if_data
*sdata
=
2839 (struct ieee80211_sub_if_data
*) data
;
2840 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2841 struct ieee80211_local
*local
= sdata
->local
;
2843 if (local
->quiescing
)
2846 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2849 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2851 struct ieee80211_sub_if_data
*sdata
=
2852 container_of(work
, struct ieee80211_sub_if_data
,
2853 u
.mgd
.monitor_work
);
2855 ieee80211_mgd_probe_ap(sdata
, false);
2858 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2862 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2863 __ieee80211_stop_poll(sdata
);
2865 /* let's probe the connection once */
2866 flags
= sdata
->local
->hw
.flags
;
2867 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2868 ieee80211_queue_work(&sdata
->local
->hw
,
2869 &sdata
->u
.mgd
.monitor_work
);
2870 /* and do all the other regular work too */
2871 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2876 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2881 * we need to use atomic bitops for the running bits
2882 * only because both timers might fire at the same
2883 * time -- the code here is properly synchronised.
2886 cancel_work_sync(&ifmgd
->request_smps_work
);
2888 cancel_work_sync(&ifmgd
->monitor_work
);
2889 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2890 if (del_timer_sync(&ifmgd
->timer
))
2891 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2893 cancel_work_sync(&ifmgd
->chswitch_work
);
2894 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2895 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2897 /* these will just be re-established on connection */
2898 del_timer_sync(&ifmgd
->conn_mon_timer
);
2899 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2902 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2904 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2906 if (!ifmgd
->associated
)
2909 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2910 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2911 mutex_lock(&ifmgd
->mtx
);
2912 if (ifmgd
->associated
) {
2914 "driver requested disconnect after resume\n");
2915 ieee80211_sta_connection_lost(sdata
,
2916 ifmgd
->associated
->bssid
,
2917 WLAN_REASON_UNSPECIFIED
);
2918 mutex_unlock(&ifmgd
->mtx
);
2921 mutex_unlock(&ifmgd
->mtx
);
2924 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2925 add_timer(&ifmgd
->timer
);
2926 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2927 add_timer(&ifmgd
->chswitch_timer
);
2928 ieee80211_sta_reset_beacon_monitor(sdata
);
2930 mutex_lock(&sdata
->local
->mtx
);
2931 ieee80211_restart_sta_timer(sdata
);
2932 mutex_unlock(&sdata
->local
->mtx
);
2936 /* interface setup */
2937 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2939 struct ieee80211_if_managed
*ifmgd
;
2941 ifmgd
= &sdata
->u
.mgd
;
2942 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2943 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2944 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2945 ieee80211_beacon_connection_loss_work
);
2946 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2947 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2948 (unsigned long) sdata
);
2949 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2950 (unsigned long) sdata
);
2951 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2952 (unsigned long) sdata
);
2953 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2954 (unsigned long) sdata
);
2957 ifmgd
->powersave
= sdata
->wdev
.ps
;
2958 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2959 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2961 mutex_init(&ifmgd
->mtx
);
2963 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2964 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2966 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2969 /* scan finished notification */
2970 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2972 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2974 /* Restart STA timers */
2976 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2977 ieee80211_restart_sta_timer(sdata
);
2981 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2982 unsigned long data
, void *dummy
)
2984 s32 latency_usec
= (s32
) data
;
2985 struct ieee80211_local
*local
=
2986 container_of(nb
, struct ieee80211_local
,
2987 network_latency_notifier
);
2989 mutex_lock(&local
->iflist_mtx
);
2990 ieee80211_recalc_ps(local
, latency_usec
);
2991 mutex_unlock(&local
->iflist_mtx
);
2996 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
2997 struct cfg80211_bss
*cbss
, bool assoc
)
2999 struct ieee80211_local
*local
= sdata
->local
;
3000 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3001 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3002 struct sta_info
*sta
= NULL
;
3003 bool have_sta
= false;
3006 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3007 const u8
*ht_oper_ie
;
3008 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3009 struct ieee80211_supported_band
*sband
;
3011 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3016 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3021 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3026 mutex_lock(&local
->mtx
);
3027 ieee80211_recalc_idle(sdata
->local
);
3028 mutex_unlock(&local
->mtx
);
3030 /* switch to the right channel */
3031 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3033 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3035 if (sband
->ht_cap
.ht_supported
) {
3036 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3037 cbss
->information_elements
,
3038 cbss
->len_information_elements
);
3039 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3040 ht_oper
= (void *)(ht_oper_ie
+ 2);
3044 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3045 cbss
->channel
->band
);
3046 /* check that channel matches the right operating channel */
3047 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3049 * It's possible that some APs are confused here;
3050 * Netgear WNDR3700 sometimes reports 4 higher than
3051 * the actual channel in association responses, but
3052 * since we look at probe response/beacon data here
3056 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3057 cbss
->channel
->center_freq
,
3058 ht_cfreq
, ht_oper
->primary_chan
,
3059 cbss
->channel
->band
);
3065 channel_type
= NL80211_CHAN_HT20
;
3067 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3068 switch (ht_oper
->ht_param
&
3069 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3070 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3071 channel_type
= NL80211_CHAN_HT40PLUS
;
3073 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3074 channel_type
= NL80211_CHAN_HT40MINUS
;
3080 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3081 /* can only fail due to HT40+/- mismatch */
3082 channel_type
= NL80211_CHAN_HT20
;
3084 "disabling 40 MHz due to multi-vif mismatch\n");
3085 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3086 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3090 local
->oper_channel
= cbss
->channel
;
3091 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3094 u32 rates
= 0, basic_rates
= 0;
3095 bool have_higher_than_11mbit
;
3096 int min_rate
= INT_MAX
, min_rate_index
= -1;
3098 ieee80211_get_rates(sband
, bss
->supp_rates
,
3099 bss
->supp_rates_len
,
3100 &rates
, &basic_rates
,
3101 &have_higher_than_11mbit
,
3102 &min_rate
, &min_rate_index
);
3105 * This used to be a workaround for basic rates missing
3106 * in the association response frame. Now that we no
3107 * longer use the basic rates from there, it probably
3108 * doesn't happen any more, but keep the workaround so
3109 * in case some *other* APs are buggy in different ways
3110 * we can connect -- with a warning.
3112 if (!basic_rates
&& min_rate_index
>= 0) {
3114 "No basic rates, using min rate instead\n");
3115 basic_rates
= BIT(min_rate_index
);
3118 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3119 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3121 /* cf. IEEE 802.11 9.2.12 */
3122 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3123 have_higher_than_11mbit
)
3124 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3126 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3128 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3130 /* tell driver about BSSID and basic rates */
3131 ieee80211_bss_info_change_notify(sdata
,
3132 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3135 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3137 err
= sta_info_insert(sta
);
3141 "failed to insert STA entry for the AP (error %d)\n",
3146 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3152 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3153 struct cfg80211_auth_request
*req
)
3155 struct ieee80211_local
*local
= sdata
->local
;
3156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3157 struct ieee80211_mgd_auth_data
*auth_data
;
3161 /* prepare auth data structure */
3163 switch (req
->auth_type
) {
3164 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3165 auth_alg
= WLAN_AUTH_OPEN
;
3167 case NL80211_AUTHTYPE_SHARED_KEY
:
3168 if (IS_ERR(local
->wep_tx_tfm
))
3170 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3172 case NL80211_AUTHTYPE_FT
:
3173 auth_alg
= WLAN_AUTH_FT
;
3175 case NL80211_AUTHTYPE_NETWORK_EAP
:
3176 auth_alg
= WLAN_AUTH_LEAP
;
3182 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3186 auth_data
->bss
= req
->bss
;
3188 if (req
->ie
&& req
->ie_len
) {
3189 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3190 auth_data
->ie_len
= req
->ie_len
;
3193 if (req
->key
&& req
->key_len
) {
3194 auth_data
->key_len
= req
->key_len
;
3195 auth_data
->key_idx
= req
->key_idx
;
3196 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3199 auth_data
->algorithm
= auth_alg
;
3201 /* try to authenticate/probe */
3203 mutex_lock(&ifmgd
->mtx
);
3205 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3206 ifmgd
->assoc_data
) {
3211 if (ifmgd
->auth_data
)
3212 ieee80211_destroy_auth_data(sdata
, false);
3214 /* prep auth_data so we don't go into idle on disassoc */
3215 ifmgd
->auth_data
= auth_data
;
3217 if (ifmgd
->associated
)
3218 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3220 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3222 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3226 err
= ieee80211_probe_auth(sdata
);
3228 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3232 /* hold our own reference */
3233 cfg80211_ref_bss(auth_data
->bss
);
3238 ifmgd
->auth_data
= NULL
;
3242 mutex_unlock(&ifmgd
->mtx
);
3247 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3248 struct cfg80211_assoc_request
*req
)
3250 struct ieee80211_local
*local
= sdata
->local
;
3251 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3252 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3253 struct ieee80211_mgd_assoc_data
*assoc_data
;
3254 struct ieee80211_supported_band
*sband
;
3255 const u8
*ssidie
, *ht_ie
;
3258 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3262 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3266 mutex_lock(&ifmgd
->mtx
);
3268 if (ifmgd
->associated
)
3269 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3271 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3276 if (ifmgd
->assoc_data
) {
3281 if (ifmgd
->auth_data
) {
3284 /* keep sta info, bssid if matching */
3285 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3286 ieee80211_destroy_auth_data(sdata
, match
);
3289 /* prepare assoc data */
3291 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3292 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3294 ifmgd
->beacon_crc_valid
= false;
3297 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3298 * We still associate in non-HT mode (11a/b/g) if any one of these
3299 * ciphers is configured as pairwise.
3300 * We can set this to true for non-11n hardware, that'll be checked
3301 * separately along with the peer capabilities.
3303 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3304 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3305 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3306 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3307 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3308 netdev_info(sdata
->dev
,
3309 "disabling HT due to WEP/TKIP use\n");
3313 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3314 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3316 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3317 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3318 if (!sband
->ht_cap
.ht_supported
||
3319 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3320 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3321 netdev_info(sdata
->dev
,
3322 "disabling HT as WMM/QoS is not supported\n");
3325 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3326 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3327 sizeof(ifmgd
->ht_capa_mask
));
3329 if (req
->ie
&& req
->ie_len
) {
3330 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3331 assoc_data
->ie_len
= req
->ie_len
;
3334 assoc_data
->bss
= req
->bss
;
3336 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3337 if (ifmgd
->powersave
)
3338 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3340 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3342 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3344 assoc_data
->capability
= req
->bss
->capability
;
3345 assoc_data
->wmm
= bss
->wmm_used
&&
3346 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3347 assoc_data
->supp_rates
= bss
->supp_rates
;
3348 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3350 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3351 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3352 assoc_data
->ap_ht_param
=
3353 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3355 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3357 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3358 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3359 assoc_data
->uapsd
= true;
3360 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3362 assoc_data
->uapsd
= false;
3363 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3366 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3367 assoc_data
->ssid_len
= ssidie
[1];
3369 if (req
->prev_bssid
)
3370 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3373 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3374 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3376 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3377 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3380 if (req
->crypto
.control_port
)
3381 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3383 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3385 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3386 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3388 /* kick off associate process */
3390 ifmgd
->assoc_data
= assoc_data
;
3392 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3396 if (!bss
->dtim_period
&&
3397 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3399 * Wait up to one beacon interval ...
3400 * should this be more if we miss one?
3402 sdata_info(sdata
, "waiting for beacon from %pM\n",
3404 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3406 assoc_data
->have_beacon
= true;
3407 assoc_data
->sent_assoc
= false;
3408 assoc_data
->timeout
= jiffies
;
3410 run_again(ifmgd
, assoc_data
->timeout
);
3412 if (bss
->corrupt_data
) {
3413 char *corrupt_type
= "data";
3414 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3415 if (bss
->corrupt_data
&
3416 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3417 corrupt_type
= "beacon and probe response";
3419 corrupt_type
= "beacon";
3420 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3421 corrupt_type
= "probe response";
3422 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3429 ifmgd
->assoc_data
= NULL
;
3433 mutex_unlock(&ifmgd
->mtx
);
3438 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3439 struct cfg80211_deauth_request
*req
)
3441 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3442 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3444 mutex_lock(&ifmgd
->mtx
);
3446 if (ifmgd
->auth_data
) {
3447 ieee80211_destroy_auth_data(sdata
, false);
3448 mutex_unlock(&ifmgd
->mtx
);
3453 "deauthenticating from %pM by local choice (reason=%d)\n",
3454 req
->bssid
, req
->reason_code
);
3456 if (ifmgd
->associated
&&
3457 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3458 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3459 req
->reason_code
, true, frame_buf
);
3461 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3462 IEEE80211_STYPE_DEAUTH
,
3463 req
->reason_code
, true,
3465 mutex_unlock(&ifmgd
->mtx
);
3467 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3469 mutex_lock(&sdata
->local
->mtx
);
3470 ieee80211_recalc_idle(sdata
->local
);
3471 mutex_unlock(&sdata
->local
->mtx
);
3476 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3477 struct cfg80211_disassoc_request
*req
)
3479 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3481 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3483 mutex_lock(&ifmgd
->mtx
);
3486 * cfg80211 should catch this ... but it's racy since
3487 * we can receive a disassoc frame, process it, hand it
3488 * to cfg80211 while that's in a locked section already
3489 * trying to tell us that the user wants to disconnect.
3491 if (ifmgd
->associated
!= req
->bss
) {
3492 mutex_unlock(&ifmgd
->mtx
);
3497 "disassociating from %pM by local choice (reason=%d)\n",
3498 req
->bss
->bssid
, req
->reason_code
);
3500 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3501 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3502 req
->reason_code
, !req
->local_state_change
,
3504 mutex_unlock(&ifmgd
->mtx
);
3506 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3508 mutex_lock(&sdata
->local
->mtx
);
3509 ieee80211_recalc_idle(sdata
->local
);
3510 mutex_unlock(&sdata
->local
->mtx
);
3515 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3517 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3519 mutex_lock(&ifmgd
->mtx
);
3520 if (ifmgd
->assoc_data
)
3521 ieee80211_destroy_assoc_data(sdata
, false);
3522 if (ifmgd
->auth_data
)
3523 ieee80211_destroy_auth_data(sdata
, false);
3524 del_timer_sync(&ifmgd
->timer
);
3525 mutex_unlock(&ifmgd
->mtx
);
3528 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3529 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3532 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3534 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3536 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3538 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);