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;
175 * ieee80211_enable_ht should be called only after the operating band
176 * has been determined as ht configuration depends on the hw's
177 * HT abilities for a specific band.
179 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
180 struct ieee80211_ht_operation
*ht_oper
,
181 const u8
*bssid
, u16 ap_ht_cap_flags
,
182 bool beacon_htcap_ie
)
184 struct ieee80211_local
*local
= sdata
->local
;
185 struct ieee80211_supported_band
*sband
;
186 struct sta_info
*sta
;
190 bool enable_ht
= true;
191 enum nl80211_channel_type prev_chantype
;
192 enum nl80211_channel_type rx_channel_type
= NL80211_CHAN_NO_HT
;
193 enum nl80211_channel_type tx_channel_type
;
195 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
196 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
199 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
201 /* check that channel matches the right operating channel */
202 if (local
->hw
.conf
.channel
->center_freq
!= ht_cfreq
) {
203 /* Some APs mess this up, evidently.
204 * Netgear WNDR3700 sometimes reports 4 higher than
205 * the actual channel, for instance.
208 "%s: Wrong control channel in association"
209 " response: configured center-freq: %d"
210 " ht-cfreq: %d ht->control_chan: %d"
211 " band: %d. Disabling HT.\n",
213 local
->hw
.conf
.channel
->center_freq
,
214 ht_cfreq
, ht_oper
->primary_chan
,
220 rx_channel_type
= NL80211_CHAN_HT20
;
222 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
223 !ieee80111_cfg_override_disables_ht40(sdata
) &&
224 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
225 (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
226 switch (ht_oper
->ht_param
&
227 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
228 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
229 rx_channel_type
= NL80211_CHAN_HT40PLUS
;
231 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
232 rx_channel_type
= NL80211_CHAN_HT40MINUS
;
238 tx_channel_type
= ieee80211_get_tx_channel_type(local
, rx_channel_type
);
240 if (local
->tmp_channel
)
241 local
->tmp_channel_type
= rx_channel_type
;
243 if (!ieee80211_set_channel_type(local
, sdata
, rx_channel_type
)) {
244 /* can only fail due to HT40+/- mismatch */
245 rx_channel_type
= NL80211_CHAN_HT20
;
246 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
250 if (beacon_htcap_ie
&& (prev_chantype
!= rx_channel_type
)) {
252 * Whenever the AP announces the HT mode change that can be
253 * 40MHz intolerant or etc., it would be safer to stop tx
254 * queues before doing hw config to avoid buffer overflow.
256 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
257 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
259 /* flush out all packets */
262 drv_flush(local
, false);
265 /* channel_type change automatically detected */
266 ieee80211_hw_config(local
, 0);
268 if (prev_chantype
!= tx_channel_type
) {
270 sta
= sta_info_get(sdata
, bssid
);
272 rate_control_rate_update(local
, sband
, sta
,
273 IEEE80211_RC_HT_CHANGED
,
278 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
279 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
282 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
284 /* if bss configuration changed store the new one */
285 if (sdata
->ht_opmode_valid
!= enable_ht
||
286 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
287 prev_chantype
!= rx_channel_type
) {
288 changed
|= BSS_CHANGED_HT
;
289 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
290 sdata
->ht_opmode_valid
= enable_ht
;
296 /* frame sending functions */
298 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
299 struct ieee80211_supported_band
*sband
,
305 for (i
= 0; i
< supp_rates_len
; i
++) {
306 int rate
= (supp_rates
[i
] & 0x7F) * 5;
308 for (j
= 0; j
< sband
->n_bitrates
; j
++)
309 if (sband
->bitrates
[j
].bitrate
== rate
) {
319 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
320 struct sk_buff
*skb
, const u8
*ht_oper_ie
,
321 struct ieee80211_supported_band
*sband
,
322 struct ieee80211_channel
*channel
,
323 enum ieee80211_smps_mode smps
)
325 struct ieee80211_ht_operation
*ht_oper
;
327 u32 flags
= channel
->flags
;
329 struct ieee80211_sta_ht_cap ht_cap
;
331 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
336 if (ht_oper_ie
[1] < sizeof(struct ieee80211_ht_operation
))
339 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
340 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
342 ht_oper
= (struct ieee80211_ht_operation
*)(ht_oper_ie
+ 2);
344 /* determine capability flags */
347 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
349 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
350 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
351 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
354 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
355 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
356 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
357 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
362 /* set SM PS mode properly */
363 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
365 case IEEE80211_SMPS_AUTOMATIC
:
366 case IEEE80211_SMPS_NUM_MODES
:
368 case IEEE80211_SMPS_OFF
:
369 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
370 IEEE80211_HT_CAP_SM_PS_SHIFT
;
372 case IEEE80211_SMPS_STATIC
:
373 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
374 IEEE80211_HT_CAP_SM_PS_SHIFT
;
376 case IEEE80211_SMPS_DYNAMIC
:
377 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
378 IEEE80211_HT_CAP_SM_PS_SHIFT
;
382 /* reserve and fill IE */
383 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
384 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
387 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
389 struct ieee80211_local
*local
= sdata
->local
;
390 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
391 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
393 struct ieee80211_mgmt
*mgmt
;
395 size_t offset
= 0, noffset
;
396 int i
, count
, rates_len
, supp_rates_len
;
398 struct ieee80211_supported_band
*sband
;
401 lockdep_assert_held(&ifmgd
->mtx
);
403 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
405 if (assoc_data
->supp_rates_len
) {
407 * Get all rates supported by the device and the AP as
408 * some APs don't like getting a superset of their rates
409 * in the association request (e.g. D-Link DAP 1353 in
412 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
413 assoc_data
->supp_rates_len
,
417 * In case AP not provide any supported rates information
418 * before association, we send information element(s) with
419 * all rates that we support.
422 rates_len
= sband
->n_bitrates
;
425 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
426 sizeof(*mgmt
) + /* bit too much but doesn't matter */
427 2 + assoc_data
->ssid_len
+ /* SSID */
428 4 + rates_len
+ /* (extended) rates */
429 4 + /* power capability */
430 2 + 2 * sband
->n_channels
+ /* supported channels */
431 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
432 assoc_data
->ie_len
+ /* extra IEs */
438 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
440 capab
= WLAN_CAPABILITY_ESS
;
442 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
443 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
444 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
445 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
446 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
449 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
450 capab
|= WLAN_CAPABILITY_PRIVACY
;
452 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
453 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
454 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
456 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
458 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
459 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
460 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
462 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
464 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
465 IEEE80211_STYPE_REASSOC_REQ
);
466 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
467 mgmt
->u
.reassoc_req
.listen_interval
=
468 cpu_to_le16(local
->hw
.conf
.listen_interval
);
469 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
473 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
474 IEEE80211_STYPE_ASSOC_REQ
);
475 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
476 mgmt
->u
.assoc_req
.listen_interval
=
477 cpu_to_le16(local
->hw
.conf
.listen_interval
);
481 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
482 *pos
++ = WLAN_EID_SSID
;
483 *pos
++ = assoc_data
->ssid_len
;
484 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
486 /* add all rates which were marked to be used above */
487 supp_rates_len
= rates_len
;
488 if (supp_rates_len
> 8)
491 pos
= skb_put(skb
, supp_rates_len
+ 2);
492 *pos
++ = WLAN_EID_SUPP_RATES
;
493 *pos
++ = supp_rates_len
;
496 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
497 if (BIT(i
) & rates
) {
498 int rate
= sband
->bitrates
[i
].bitrate
;
499 *pos
++ = (u8
) (rate
/ 5);
505 if (rates_len
> count
) {
506 pos
= skb_put(skb
, rates_len
- count
+ 2);
507 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
508 *pos
++ = rates_len
- count
;
510 for (i
++; i
< sband
->n_bitrates
; i
++) {
511 if (BIT(i
) & rates
) {
512 int rate
= sband
->bitrates
[i
].bitrate
;
513 *pos
++ = (u8
) (rate
/ 5);
518 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
519 /* 1. power capabilities */
520 pos
= skb_put(skb
, 4);
521 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
523 *pos
++ = 0; /* min tx power */
524 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
526 /* 2. supported channels */
527 /* TODO: get this in reg domain format */
528 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
529 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
530 *pos
++ = 2 * sband
->n_channels
;
531 for (i
= 0; i
< sband
->n_channels
; i
++) {
532 *pos
++ = ieee80211_frequency_to_channel(
533 sband
->channels
[i
].center_freq
);
534 *pos
++ = 1; /* one channel in the subband*/
538 /* if present, add any custom IEs that go before HT */
539 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
540 static const u8 before_ht
[] = {
543 WLAN_EID_EXT_SUPP_RATES
,
544 WLAN_EID_PWR_CAPABILITY
,
545 WLAN_EID_SUPPORTED_CHANNELS
,
548 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
549 WLAN_EID_MOBILITY_DOMAIN
,
550 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
552 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
553 before_ht
, ARRAY_SIZE(before_ht
),
555 pos
= skb_put(skb
, noffset
- offset
);
556 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
560 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
561 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ht_operation_ie
,
562 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
564 /* if present, add any custom non-vendor IEs that go after HT */
565 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
566 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
569 pos
= skb_put(skb
, noffset
- offset
);
570 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
574 if (assoc_data
->wmm
) {
575 if (assoc_data
->uapsd
) {
576 qos_info
= ifmgd
->uapsd_queues
;
577 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
578 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
583 pos
= skb_put(skb
, 9);
584 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
585 *pos
++ = 7; /* len */
586 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
589 *pos
++ = 2; /* WME */
590 *pos
++ = 0; /* WME info */
591 *pos
++ = 1; /* WME ver */
595 /* add any remaining custom (i.e. vendor specific here) IEs */
596 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
597 noffset
= assoc_data
->ie_len
;
598 pos
= skb_put(skb
, noffset
- offset
);
599 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
602 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
603 ieee80211_tx_skb(sdata
, skb
);
606 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
607 const u8
*bssid
, u16 stype
,
608 u16 reason
, bool send_frame
,
611 struct ieee80211_local
*local
= sdata
->local
;
612 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
614 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
617 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
618 mgmt
->duration
= 0; /* initialize only */
619 mgmt
->seq_ctrl
= 0; /* initialize only */
620 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
621 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
622 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
623 /* u.deauth.reason_code == u.disassoc.reason_code */
624 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
627 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
628 DEAUTH_DISASSOC_LEN
);
632 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
635 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
636 mgmt
, DEAUTH_DISASSOC_LEN
);
638 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
639 IEEE80211_SKB_CB(skb
)->flags
|=
640 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
641 ieee80211_tx_skb(sdata
, skb
);
645 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
646 struct ieee80211_sub_if_data
*sdata
)
648 struct ieee80211_pspoll
*pspoll
;
651 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
655 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
656 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
658 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
659 ieee80211_tx_skb(sdata
, skb
);
662 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
663 struct ieee80211_sub_if_data
*sdata
,
667 struct ieee80211_hdr_3addr
*nullfunc
;
668 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
670 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
674 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
676 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
678 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
679 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
680 IEEE80211_STA_CONNECTION_POLL
))
681 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
683 ieee80211_tx_skb(sdata
, skb
);
686 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
687 struct ieee80211_sub_if_data
*sdata
)
690 struct ieee80211_hdr
*nullfunc
;
693 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
696 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
700 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
702 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
703 memset(nullfunc
, 0, 30);
704 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
705 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
706 nullfunc
->frame_control
= fc
;
707 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
708 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
709 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
710 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
712 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
713 ieee80211_tx_skb(sdata
, skb
);
716 /* spectrum management related things */
717 static void ieee80211_chswitch_work(struct work_struct
*work
)
719 struct ieee80211_sub_if_data
*sdata
=
720 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
721 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
723 if (!ieee80211_sdata_running(sdata
))
726 mutex_lock(&ifmgd
->mtx
);
727 if (!ifmgd
->associated
)
730 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
731 if (!sdata
->local
->ops
->channel_switch
) {
732 /* call "hw_config" only if doing sw channel switch */
733 ieee80211_hw_config(sdata
->local
,
734 IEEE80211_CONF_CHANGE_CHANNEL
);
736 /* update the device channel directly */
737 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
740 /* XXX: shouldn't really modify cfg80211-owned data! */
741 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
743 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
744 IEEE80211_QUEUE_STOP_REASON_CSA
);
746 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
747 mutex_unlock(&ifmgd
->mtx
);
750 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
752 struct ieee80211_sub_if_data
*sdata
;
753 struct ieee80211_if_managed
*ifmgd
;
755 sdata
= vif_to_sdata(vif
);
756 ifmgd
= &sdata
->u
.mgd
;
758 trace_api_chswitch_done(sdata
, success
);
761 * If the channel switch was not successful, stay
762 * around on the old channel. We currently lack
763 * good handling of this situation, possibly we
764 * should just drop the association.
766 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
769 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
771 EXPORT_SYMBOL(ieee80211_chswitch_done
);
773 static void ieee80211_chswitch_timer(unsigned long data
)
775 struct ieee80211_sub_if_data
*sdata
=
776 (struct ieee80211_sub_if_data
*) data
;
777 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
779 if (sdata
->local
->quiescing
) {
780 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
784 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
787 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
788 struct ieee80211_channel_sw_ie
*sw_elem
,
789 struct ieee80211_bss
*bss
,
792 struct cfg80211_bss
*cbss
=
793 container_of((void *)bss
, struct cfg80211_bss
, priv
);
794 struct ieee80211_channel
*new_ch
;
795 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
796 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
797 cbss
->channel
->band
);
799 ASSERT_MGD_MTX(ifmgd
);
801 if (!ifmgd
->associated
)
804 if (sdata
->local
->scanning
)
807 /* Disregard subsequent beacons if we are already running a timer
810 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
813 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
814 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
817 sdata
->local
->csa_channel
= new_ch
;
819 if (sdata
->local
->ops
->channel_switch
) {
820 /* use driver's channel switch callback */
821 struct ieee80211_channel_switch ch_switch
;
822 memset(&ch_switch
, 0, sizeof(ch_switch
));
823 ch_switch
.timestamp
= timestamp
;
825 ch_switch
.block_tx
= true;
826 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
827 IEEE80211_QUEUE_STOP_REASON_CSA
);
829 ch_switch
.channel
= new_ch
;
830 ch_switch
.count
= sw_elem
->count
;
831 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
832 drv_channel_switch(sdata
->local
, &ch_switch
);
836 /* channel switch handled in software */
837 if (sw_elem
->count
<= 1) {
838 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
841 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
842 IEEE80211_QUEUE_STOP_REASON_CSA
);
843 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
844 mod_timer(&ifmgd
->chswitch_timer
,
846 msecs_to_jiffies(sw_elem
->count
*
847 cbss
->beacon_interval
));
851 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
852 u16 capab_info
, u8
*pwr_constr_elem
,
853 u8 pwr_constr_elem_len
)
855 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
857 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
860 /* Power constraint IE length should be 1 octet */
861 if (pwr_constr_elem_len
!= 1)
864 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
865 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
866 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
867 ieee80211_hw_config(sdata
->local
, 0);
871 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
873 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
874 struct ieee80211_local
*local
= sdata
->local
;
875 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
877 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
878 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
879 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
881 local
->disable_dynamic_ps
= false;
882 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
884 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
886 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
888 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
889 struct ieee80211_local
*local
= sdata
->local
;
890 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
892 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
893 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
894 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
896 local
->disable_dynamic_ps
= true;
897 conf
->dynamic_ps_timeout
= 0;
898 del_timer_sync(&local
->dynamic_ps_timer
);
899 ieee80211_queue_work(&local
->hw
,
900 &local
->dynamic_ps_enable_work
);
902 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
905 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
906 struct ieee80211_sub_if_data
*sdata
)
908 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
911 * If we are scanning right now then the parameters will
912 * take effect when scan finishes.
917 if (conf
->dynamic_ps_timeout
> 0 &&
918 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
919 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
920 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
922 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
923 ieee80211_send_nullfunc(local
, sdata
, 1);
925 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
926 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
929 conf
->flags
|= IEEE80211_CONF_PS
;
930 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
934 static void ieee80211_change_ps(struct ieee80211_local
*local
)
936 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
938 if (local
->ps_sdata
) {
939 ieee80211_enable_ps(local
, local
->ps_sdata
);
940 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
941 conf
->flags
&= ~IEEE80211_CONF_PS
;
942 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
943 del_timer_sync(&local
->dynamic_ps_timer
);
944 cancel_work_sync(&local
->dynamic_ps_enable_work
);
948 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
950 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
951 struct sta_info
*sta
= NULL
;
952 bool authorized
= false;
960 if (!mgd
->associated
)
963 if (!mgd
->associated
->beacon_ies
)
966 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
967 IEEE80211_STA_CONNECTION_POLL
))
971 sta
= sta_info_get(sdata
, mgd
->bssid
);
973 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
979 /* need to hold RTNL or interface lock */
980 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
982 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
986 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
987 local
->ps_sdata
= NULL
;
991 if (!list_empty(&local
->work_list
)) {
992 local
->ps_sdata
= NULL
;
996 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
997 if (!ieee80211_sdata_running(sdata
))
999 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1000 /* If an AP vif is found, then disable PS
1001 * by setting the count to zero thereby setting
1007 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1013 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1014 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1018 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1020 beaconint_us
= ieee80211_tu_to_usec(
1021 found
->vif
.bss_conf
.beacon_int
);
1023 timeout
= local
->dynamic_ps_forced_timeout
;
1026 * Go to full PSM if the user configures a very low
1027 * latency requirement.
1028 * The 2000 second value is there for compatibility
1029 * until the PM_QOS_NETWORK_LATENCY is configured
1032 if (latency
> (1900 * USEC_PER_MSEC
) &&
1033 latency
!= (2000 * USEC_PER_SEC
))
1038 local
->dynamic_ps_user_timeout
= timeout
;
1039 if (!local
->disable_dynamic_ps
)
1040 conf
->dynamic_ps_timeout
=
1041 local
->dynamic_ps_user_timeout
;
1043 if (beaconint_us
> latency
) {
1044 local
->ps_sdata
= NULL
;
1046 struct ieee80211_bss
*bss
;
1050 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1051 dtimper
= bss
->dtim_period
;
1053 /* If the TIM IE is invalid, pretend the value is 1 */
1056 else if (dtimper
> 1)
1057 maxslp
= min_t(int, dtimper
,
1058 latency
/ beaconint_us
);
1060 local
->hw
.conf
.max_sleep_period
= maxslp
;
1061 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1062 local
->ps_sdata
= found
;
1065 local
->ps_sdata
= NULL
;
1069 ieee80211_change_ps(local
);
1072 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1074 struct ieee80211_local
*local
=
1075 container_of(work
, struct ieee80211_local
,
1076 dynamic_ps_disable_work
);
1078 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1079 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1080 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1083 ieee80211_wake_queues_by_reason(&local
->hw
,
1084 IEEE80211_QUEUE_STOP_REASON_PS
);
1087 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1089 struct ieee80211_local
*local
=
1090 container_of(work
, struct ieee80211_local
,
1091 dynamic_ps_enable_work
);
1092 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1093 struct ieee80211_if_managed
*ifmgd
;
1094 unsigned long flags
;
1097 /* can only happen when PS was just disabled anyway */
1101 ifmgd
= &sdata
->u
.mgd
;
1103 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1106 if (!local
->disable_dynamic_ps
&&
1107 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1108 /* don't enter PS if TX frames are pending */
1109 if (drv_tx_frames_pending(local
)) {
1110 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1112 local
->hw
.conf
.dynamic_ps_timeout
));
1117 * transmission can be stopped by others which leads to
1118 * dynamic_ps_timer expiry. Postpone the ps timer if it
1119 * is not the actual idle state.
1121 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1122 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1123 if (local
->queue_stop_reasons
[q
]) {
1124 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1126 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1128 local
->hw
.conf
.dynamic_ps_timeout
));
1132 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1135 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1136 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1137 netif_tx_stop_all_queues(sdata
->dev
);
1139 if (drv_tx_frames_pending(local
))
1140 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1142 local
->hw
.conf
.dynamic_ps_timeout
));
1144 ieee80211_send_nullfunc(local
, sdata
, 1);
1145 /* Flush to get the tx status of nullfunc frame */
1146 drv_flush(local
, false);
1150 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1151 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1152 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1153 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1154 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1155 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1158 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1159 netif_tx_wake_all_queues(sdata
->dev
);
1162 void ieee80211_dynamic_ps_timer(unsigned long data
)
1164 struct ieee80211_local
*local
= (void *) data
;
1166 if (local
->quiescing
|| local
->suspended
)
1169 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1173 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1174 struct ieee80211_sub_if_data
*sdata
,
1175 u8
*wmm_param
, size_t wmm_param_len
)
1177 struct ieee80211_tx_queue_params params
;
1178 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1181 u8
*pos
, uapsd_queues
= 0;
1183 if (!local
->ops
->conf_tx
)
1186 if (local
->hw
.queues
< 4)
1192 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1195 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1196 uapsd_queues
= ifmgd
->uapsd_queues
;
1198 count
= wmm_param
[6] & 0x0f;
1199 if (count
== ifmgd
->wmm_last_param_set
)
1201 ifmgd
->wmm_last_param_set
= count
;
1203 pos
= wmm_param
+ 8;
1204 left
= wmm_param_len
- 8;
1206 memset(¶ms
, 0, sizeof(params
));
1209 for (; left
>= 4; left
-= 4, pos
+= 4) {
1210 int aci
= (pos
[0] >> 5) & 0x03;
1211 int acm
= (pos
[0] >> 4) & 0x01;
1219 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1220 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1226 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1227 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1233 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1234 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1241 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1242 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1247 params
.aifs
= pos
[0] & 0x0f;
1248 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1249 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1250 params
.txop
= get_unaligned_le16(pos
+ 2);
1251 params
.uapsd
= uapsd
;
1253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1254 wiphy_debug(local
->hw
.wiphy
,
1255 "WMM queue=%d aci=%d acm=%d aifs=%d "
1256 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1258 params
.aifs
, params
.cw_min
, params
.cw_max
,
1259 params
.txop
, params
.uapsd
);
1261 sdata
->tx_conf
[queue
] = params
;
1262 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1263 wiphy_debug(local
->hw
.wiphy
,
1264 "failed to set TX queue parameters for queue %d\n",
1268 /* enable WMM or activate new settings */
1269 sdata
->vif
.bss_conf
.qos
= true;
1272 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1273 u16 capab
, bool erp_valid
, u8 erp
)
1275 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1277 bool use_protection
;
1278 bool use_short_preamble
;
1279 bool use_short_slot
;
1282 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1283 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1285 use_protection
= false;
1286 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1289 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1290 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1291 use_short_slot
= true;
1293 if (use_protection
!= bss_conf
->use_cts_prot
) {
1294 bss_conf
->use_cts_prot
= use_protection
;
1295 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1298 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1299 bss_conf
->use_short_preamble
= use_short_preamble
;
1300 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1303 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1304 bss_conf
->use_short_slot
= use_short_slot
;
1305 changed
|= BSS_CHANGED_ERP_SLOT
;
1311 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1312 struct cfg80211_bss
*cbss
,
1313 u32 bss_info_changed
)
1315 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1316 struct ieee80211_local
*local
= sdata
->local
;
1317 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1319 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1320 /* set timing information */
1321 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1322 bss_conf
->last_tsf
= cbss
->tsf
;
1324 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1325 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1326 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1328 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1329 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1331 sdata
->u
.mgd
.associated
= cbss
;
1332 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1334 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1336 /* just to be sure */
1337 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1338 IEEE80211_STA_BEACON_POLL
);
1340 ieee80211_led_assoc(local
, 1);
1342 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1343 bss_conf
->dtim_period
= bss
->dtim_period
;
1345 bss_conf
->dtim_period
= 0;
1347 bss_conf
->assoc
= 1;
1349 /* Tell the driver to monitor connection quality (if supported) */
1350 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1351 bss_conf
->cqm_rssi_thold
)
1352 bss_info_changed
|= BSS_CHANGED_CQM
;
1354 /* Enable ARP filtering */
1355 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1356 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1357 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1360 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1362 mutex_lock(&local
->iflist_mtx
);
1363 ieee80211_recalc_ps(local
, -1);
1364 ieee80211_recalc_smps(local
);
1365 mutex_unlock(&local
->iflist_mtx
);
1367 netif_tx_start_all_queues(sdata
->dev
);
1368 netif_carrier_on(sdata
->dev
);
1371 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1372 u16 stype
, u16 reason
, bool tx
,
1375 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1376 struct ieee80211_local
*local
= sdata
->local
;
1377 struct sta_info
*sta
;
1381 ASSERT_MGD_MTX(ifmgd
);
1383 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1386 if (WARN_ON(!ifmgd
->associated
))
1389 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1391 ifmgd
->associated
= NULL
;
1392 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1395 * we need to commit the associated = NULL change because the
1396 * scan code uses that to determine whether this iface should
1397 * go to/wake up from powersave or not -- and could otherwise
1398 * wake the queues erroneously.
1403 * Thus, we can only afterwards stop the queues -- to account
1404 * for the case where another CPU is finishing a scan at this
1405 * time -- we don't want the scan code to enable queues.
1408 netif_tx_stop_all_queues(sdata
->dev
);
1409 netif_carrier_off(sdata
->dev
);
1411 mutex_lock(&local
->sta_mtx
);
1412 sta
= sta_info_get(sdata
, bssid
);
1414 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1415 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1417 mutex_unlock(&local
->sta_mtx
);
1419 /* deauthenticate/disassociate now */
1420 if (tx
|| frame_buf
)
1421 ieee80211_send_deauth_disassoc(sdata
, bssid
, stype
, reason
,
1424 /* flush out frame */
1426 drv_flush(local
, false);
1428 /* remove AP and TDLS peers */
1429 sta_info_flush(local
, sdata
);
1431 /* finally reset all BSS / config parameters */
1432 changed
|= ieee80211_reset_erp_info(sdata
);
1434 ieee80211_led_assoc(local
, 0);
1435 changed
|= BSS_CHANGED_ASSOC
;
1436 sdata
->vif
.bss_conf
.assoc
= false;
1438 /* on the next assoc, re-program HT parameters */
1439 sdata
->ht_opmode_valid
= false;
1440 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1441 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1443 local
->power_constr_level
= 0;
1445 del_timer_sync(&local
->dynamic_ps_timer
);
1446 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1448 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1449 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1450 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1452 local
->ps_sdata
= NULL
;
1454 /* Disable ARP filtering */
1455 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1456 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1457 changed
|= BSS_CHANGED_ARP_FILTER
;
1460 sdata
->vif
.bss_conf
.qos
= false;
1461 changed
|= BSS_CHANGED_QOS
;
1463 /* The BSSID (not really interesting) and HT changed */
1464 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1465 ieee80211_bss_info_change_notify(sdata
, changed
);
1467 /* channel(_type) changes are handled by ieee80211_hw_config */
1468 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1469 ieee80211_hw_config(local
, 0);
1471 /* disassociated - set to defaults now */
1472 ieee80211_set_wmm_default(sdata
, false);
1474 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1475 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1476 del_timer_sync(&sdata
->u
.mgd
.timer
);
1477 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1480 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1481 struct ieee80211_hdr
*hdr
)
1484 * We can postpone the mgd.timer whenever receiving unicast frames
1485 * from AP because we know that the connection is working both ways
1486 * at that time. But multicast frames (and hence also beacons) must
1487 * be ignored here, because we need to trigger the timer during
1488 * data idle periods for sending the periodic probe request to the
1489 * AP we're connected to.
1491 if (is_multicast_ether_addr(hdr
->addr1
))
1494 ieee80211_sta_reset_conn_monitor(sdata
);
1497 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1499 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1501 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1502 IEEE80211_STA_CONNECTION_POLL
)))
1505 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1506 IEEE80211_STA_BEACON_POLL
);
1507 mutex_lock(&sdata
->local
->iflist_mtx
);
1508 ieee80211_recalc_ps(sdata
->local
, -1);
1509 mutex_unlock(&sdata
->local
->iflist_mtx
);
1511 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1515 * We've received a probe response, but are not sure whether
1516 * we have or will be receiving any beacons or data, so let's
1517 * schedule the timers again, just in case.
1519 ieee80211_sta_reset_beacon_monitor(sdata
);
1521 mod_timer(&ifmgd
->conn_mon_timer
,
1522 round_jiffies_up(jiffies
+
1523 IEEE80211_CONNECTION_IDLE_TIME
));
1526 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1527 struct ieee80211_hdr
*hdr
, bool ack
)
1529 if (!ieee80211_is_data(hdr
->frame_control
))
1533 ieee80211_sta_reset_conn_monitor(sdata
);
1535 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1536 sdata
->u
.mgd
.probe_send_count
> 0) {
1538 sdata
->u
.mgd
.probe_send_count
= 0;
1540 sdata
->u
.mgd
.nullfunc_failed
= true;
1541 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1545 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1547 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1549 u8
*dst
= ifmgd
->associated
->bssid
;
1550 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1553 * Try sending broadcast probe requests for the last three
1554 * probe requests after the first ones failed since some
1555 * buggy APs only support broadcast probe requests.
1557 if (ifmgd
->probe_send_count
>= unicast_limit
)
1561 * When the hardware reports an accurate Tx ACK status, it's
1562 * better to send a nullfunc frame instead of a probe request,
1563 * as it will kick us off the AP quickly if we aren't associated
1564 * anymore. The timeout will be reset if the frame is ACKed by
1567 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1568 ifmgd
->nullfunc_failed
= false;
1569 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1571 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1572 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1573 (u32
) -1, true, false);
1576 ifmgd
->probe_send_count
++;
1577 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1578 run_again(ifmgd
, ifmgd
->probe_timeout
);
1579 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1580 drv_flush(sdata
->local
, false);
1583 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1586 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1587 bool already
= false;
1589 if (!ieee80211_sdata_running(sdata
))
1592 if (sdata
->local
->scanning
)
1595 if (sdata
->local
->tmp_channel
)
1598 mutex_lock(&ifmgd
->mtx
);
1600 if (!ifmgd
->associated
)
1603 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1604 if (beacon
&& net_ratelimit())
1605 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1606 "- sending probe request\n", sdata
->name
);
1610 * The driver/our work has already reported this event or the
1611 * connection monitoring has kicked in and we have already sent
1612 * a probe request. Or maybe the AP died and the driver keeps
1613 * reporting until we disassociate...
1615 * In either case we have to ignore the current call to this
1616 * function (except for setting the correct probe reason bit)
1617 * because otherwise we would reset the timer every time and
1618 * never check whether we received a probe response!
1620 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1621 IEEE80211_STA_CONNECTION_POLL
))
1625 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1627 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1632 mutex_lock(&sdata
->local
->iflist_mtx
);
1633 ieee80211_recalc_ps(sdata
->local
, -1);
1634 mutex_unlock(&sdata
->local
->iflist_mtx
);
1636 ifmgd
->probe_send_count
= 0;
1637 ieee80211_mgd_probe_ap_send(sdata
);
1639 mutex_unlock(&ifmgd
->mtx
);
1642 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1643 struct ieee80211_vif
*vif
)
1645 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1646 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1647 struct sk_buff
*skb
;
1650 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1653 ASSERT_MGD_MTX(ifmgd
);
1655 if (!ifmgd
->associated
)
1658 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1659 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1660 (u32
) -1, ssid
+ 2, ssid
[1],
1665 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1667 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1669 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1670 struct ieee80211_local
*local
= sdata
->local
;
1672 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1674 mutex_lock(&ifmgd
->mtx
);
1675 if (!ifmgd
->associated
) {
1676 mutex_unlock(&ifmgd
->mtx
);
1680 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1682 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1683 sdata
->name
, bssid
);
1685 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1686 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1688 mutex_unlock(&ifmgd
->mtx
);
1691 * must be outside lock due to cfg80211,
1692 * but that's not a problem.
1694 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1696 mutex_lock(&local
->mtx
);
1697 ieee80211_recalc_idle(local
);
1698 mutex_unlock(&local
->mtx
);
1701 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1703 struct ieee80211_sub_if_data
*sdata
=
1704 container_of(work
, struct ieee80211_sub_if_data
,
1705 u
.mgd
.beacon_connection_loss_work
);
1706 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1707 struct sta_info
*sta
;
1709 if (ifmgd
->associated
) {
1711 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1713 sta
->beacon_loss_count
++;
1717 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1718 __ieee80211_connection_loss(sdata
);
1720 ieee80211_mgd_probe_ap(sdata
, true);
1723 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1725 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1726 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1728 trace_api_beacon_loss(sdata
);
1730 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1731 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1733 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1735 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1737 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1738 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1740 trace_api_connection_loss(sdata
);
1742 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1743 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1745 EXPORT_SYMBOL(ieee80211_connection_loss
);
1748 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1751 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1753 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1756 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1758 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1759 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1762 cfg80211_put_bss(auth_data
->bss
);
1764 sdata
->u
.mgd
.auth_data
= NULL
;
1767 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1768 struct ieee80211_mgmt
*mgmt
, size_t len
)
1770 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1772 struct ieee802_11_elems elems
;
1774 pos
= mgmt
->u
.auth
.variable
;
1775 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1776 if (!elems
.challenge
)
1778 auth_data
->expected_transaction
= 4;
1779 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1780 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1781 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1782 auth_data
->key
, auth_data
->key_len
,
1783 auth_data
->key_idx
);
1786 static enum rx_mgmt_action __must_check
1787 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1788 struct ieee80211_mgmt
*mgmt
, size_t len
)
1790 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1792 u16 auth_alg
, auth_transaction
, status_code
;
1793 struct sta_info
*sta
;
1795 lockdep_assert_held(&ifmgd
->mtx
);
1798 return RX_MGMT_NONE
;
1800 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1801 return RX_MGMT_NONE
;
1803 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1805 if (compare_ether_addr(bssid
, mgmt
->bssid
))
1806 return RX_MGMT_NONE
;
1808 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1809 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1810 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1812 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1813 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1814 return RX_MGMT_NONE
;
1816 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1817 printk(KERN_DEBUG
"%s: %pM denied authentication (status %d)\n",
1818 sdata
->name
, mgmt
->sa
, status_code
);
1822 switch (ifmgd
->auth_data
->algorithm
) {
1823 case WLAN_AUTH_OPEN
:
1824 case WLAN_AUTH_LEAP
:
1827 case WLAN_AUTH_SHARED_KEY
:
1828 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1829 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1830 /* need another frame */
1831 return RX_MGMT_NONE
;
1835 WARN_ONCE(1, "invalid auth alg %d",
1836 ifmgd
->auth_data
->algorithm
);
1837 return RX_MGMT_NONE
;
1840 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->name
);
1842 ifmgd
->auth_data
->done
= true;
1843 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1844 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1846 /* move station state to auth */
1847 mutex_lock(&sdata
->local
->sta_mtx
);
1848 sta
= sta_info_get(sdata
, bssid
);
1850 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1853 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1854 printk(KERN_DEBUG
"%s: failed moving %pM to auth\n",
1855 sdata
->name
, bssid
);
1858 mutex_unlock(&sdata
->local
->sta_mtx
);
1860 return RX_MGMT_CFG80211_RX_AUTH
;
1862 mutex_unlock(&sdata
->local
->sta_mtx
);
1863 /* ignore frame -- wait for timeout */
1864 return RX_MGMT_NONE
;
1868 static enum rx_mgmt_action __must_check
1869 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1870 struct ieee80211_mgmt
*mgmt
, size_t len
)
1872 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1873 const u8
*bssid
= NULL
;
1876 lockdep_assert_held(&ifmgd
->mtx
);
1879 return RX_MGMT_NONE
;
1881 if (!ifmgd
->associated
||
1882 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1883 return RX_MGMT_NONE
;
1885 bssid
= ifmgd
->associated
->bssid
;
1887 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1889 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1890 sdata
->name
, bssid
, reason_code
);
1892 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1894 mutex_lock(&sdata
->local
->mtx
);
1895 ieee80211_recalc_idle(sdata
->local
);
1896 mutex_unlock(&sdata
->local
->mtx
);
1898 return RX_MGMT_CFG80211_DEAUTH
;
1902 static enum rx_mgmt_action __must_check
1903 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1904 struct ieee80211_mgmt
*mgmt
, size_t len
)
1906 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1909 lockdep_assert_held(&ifmgd
->mtx
);
1912 return RX_MGMT_NONE
;
1914 if (!ifmgd
->associated
||
1915 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1916 return RX_MGMT_NONE
;
1918 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1920 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1921 sdata
->name
, mgmt
->sa
, reason_code
);
1923 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1925 mutex_lock(&sdata
->local
->mtx
);
1926 ieee80211_recalc_idle(sdata
->local
);
1927 mutex_unlock(&sdata
->local
->mtx
);
1929 return RX_MGMT_CFG80211_DISASSOC
;
1932 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1933 u8
*supp_rates
, unsigned int supp_rates_len
,
1934 u32
*rates
, u32
*basic_rates
,
1935 bool *have_higher_than_11mbit
,
1936 int *min_rate
, int *min_rate_index
)
1940 for (i
= 0; i
< supp_rates_len
; i
++) {
1941 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1942 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1945 *have_higher_than_11mbit
= true;
1948 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1949 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1951 * Note: Even through the membership selector and the basic
1952 * rate flag share the same bit, they are not exactly
1955 if (!!(supp_rates
[i
] & 0x80) &&
1956 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1959 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1960 if (sband
->bitrates
[j
].bitrate
== rate
) {
1963 *basic_rates
|= BIT(j
);
1964 if (rate
< *min_rate
) {
1966 *min_rate_index
= j
;
1974 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1977 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1979 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1982 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1984 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1985 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1989 sdata
->u
.mgd
.assoc_data
= NULL
;
1992 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1993 struct cfg80211_bss
*cbss
,
1994 struct ieee80211_mgmt
*mgmt
, size_t len
)
1996 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1997 struct ieee80211_local
*local
= sdata
->local
;
1998 struct ieee80211_supported_band
*sband
;
1999 struct sta_info
*sta
;
2001 u16 capab_info
, aid
;
2002 struct ieee802_11_elems elems
;
2003 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2006 u16 ap_ht_cap_flags
;
2008 /* AssocResp and ReassocResp have identical structure */
2010 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2011 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2013 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2015 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2017 aid
&= ~(BIT(15) | BIT(14));
2019 ifmgd
->broken_ap
= false;
2021 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2023 "%s: invalid AID value %d (out of range), turn off PS\n",
2026 ifmgd
->broken_ap
= true;
2029 pos
= mgmt
->u
.assoc_resp
.variable
;
2030 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2032 if (!elems
.supp_rates
) {
2033 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
2040 mutex_lock(&sdata
->local
->sta_mtx
);
2042 * station info was already allocated and inserted before
2043 * the association and should be available to us
2045 sta
= sta_info_get(sdata
, cbss
->bssid
);
2046 if (WARN_ON(!sta
)) {
2047 mutex_unlock(&sdata
->local
->sta_mtx
);
2051 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2053 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2054 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2055 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2057 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
2059 rate_control_rate_init(sta
);
2061 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2062 set_sta_flag(sta
, WLAN_STA_MFP
);
2064 if (elems
.wmm_param
)
2065 set_sta_flag(sta
, WLAN_STA_WME
);
2067 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2069 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2070 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2071 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2074 "%s: failed to move station %pM to desired state\n",
2075 sdata
->name
, sta
->sta
.addr
);
2076 WARN_ON(__sta_info_destroy(sta
));
2077 mutex_unlock(&sdata
->local
->sta_mtx
);
2081 mutex_unlock(&sdata
->local
->sta_mtx
);
2084 * Always handle WMM once after association regardless
2085 * of the first value the AP uses. Setting -1 here has
2086 * that effect because the AP values is an unsigned
2089 ifmgd
->wmm_last_param_set
= -1;
2091 if (elems
.wmm_param
)
2092 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2093 elems
.wmm_param_len
);
2095 ieee80211_set_wmm_default(sdata
, false);
2096 changed
|= BSS_CHANGED_QOS
;
2098 if (elems
.ht_operation
&& elems
.wmm_param
&&
2099 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2100 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_operation
,
2101 cbss
->bssid
, ap_ht_cap_flags
,
2104 /* set AID and assoc capability,
2105 * ieee80211_set_associated() will tell the driver */
2106 bss_conf
->aid
= aid
;
2107 bss_conf
->assoc_capability
= capab_info
;
2108 ieee80211_set_associated(sdata
, cbss
, changed
);
2111 * If we're using 4-addr mode, let the AP know that we're
2112 * doing so, so that it can create the STA VLAN on its side
2114 if (ifmgd
->use_4addr
)
2115 ieee80211_send_4addr_nullfunc(local
, sdata
);
2118 * Start timer to probe the connection to the AP now.
2119 * Also start the timer that will detect beacon loss.
2121 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2122 ieee80211_sta_reset_beacon_monitor(sdata
);
2127 static enum rx_mgmt_action __must_check
2128 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2129 struct ieee80211_mgmt
*mgmt
, size_t len
,
2130 struct cfg80211_bss
**bss
)
2132 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2133 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2134 u16 capab_info
, status_code
, aid
;
2135 struct ieee802_11_elems elems
;
2139 lockdep_assert_held(&ifmgd
->mtx
);
2142 return RX_MGMT_NONE
;
2143 if (compare_ether_addr(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2144 return RX_MGMT_NONE
;
2147 * AssocResp and ReassocResp have identical structure, so process both
2148 * of them in this function.
2152 return RX_MGMT_NONE
;
2154 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2155 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2156 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2157 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2159 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
2160 "status=%d aid=%d)\n",
2161 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2162 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2164 pos
= mgmt
->u
.assoc_resp
.variable
;
2165 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2167 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2168 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2169 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2171 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2172 ms
= tu
* 1024 / 1000;
2173 printk(KERN_DEBUG
"%s: %pM rejected association temporarily; "
2174 "comeback duration %u TU (%u ms)\n",
2175 sdata
->name
, mgmt
->sa
, tu
, ms
);
2176 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2177 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2178 run_again(ifmgd
, assoc_data
->timeout
);
2179 return RX_MGMT_NONE
;
2182 *bss
= assoc_data
->bss
;
2184 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2185 printk(KERN_DEBUG
"%s: %pM denied association (code=%d)\n",
2186 sdata
->name
, mgmt
->sa
, status_code
);
2187 ieee80211_destroy_assoc_data(sdata
, false);
2189 printk(KERN_DEBUG
"%s: associated\n", sdata
->name
);
2191 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2192 /* oops -- internal error -- send timeout for now */
2193 ieee80211_destroy_assoc_data(sdata
, true);
2194 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2195 cfg80211_put_bss(*bss
);
2196 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2200 * destroy assoc_data afterwards, as otherwise an idle
2201 * recalc after assoc_data is NULL but before associated
2202 * is set can cause the interface to go idle
2204 ieee80211_destroy_assoc_data(sdata
, true);
2207 return RX_MGMT_CFG80211_RX_ASSOC
;
2209 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2210 struct ieee80211_mgmt
*mgmt
,
2212 struct ieee80211_rx_status
*rx_status
,
2213 struct ieee802_11_elems
*elems
,
2216 struct ieee80211_local
*local
= sdata
->local
;
2218 struct ieee80211_bss
*bss
;
2219 struct ieee80211_channel
*channel
;
2220 bool need_ps
= false;
2222 if (sdata
->u
.mgd
.associated
&&
2223 compare_ether_addr(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)
2225 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2226 /* not previously set so we may need to recalc */
2227 need_ps
= !bss
->dtim_period
;
2230 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2231 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2234 freq
= rx_status
->freq
;
2236 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2238 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2241 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2244 ieee80211_rx_bss_put(local
, bss
);
2246 if (!sdata
->u
.mgd
.associated
)
2250 mutex_lock(&local
->iflist_mtx
);
2251 ieee80211_recalc_ps(local
, -1);
2252 mutex_unlock(&local
->iflist_mtx
);
2255 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2256 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2258 struct ieee80211_channel_sw_ie
*sw_elem
=
2259 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2260 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2261 bss
, rx_status
->mactime
);
2266 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2267 struct sk_buff
*skb
)
2269 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2270 struct ieee80211_if_managed
*ifmgd
;
2271 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2272 size_t baselen
, len
= skb
->len
;
2273 struct ieee802_11_elems elems
;
2275 ifmgd
= &sdata
->u
.mgd
;
2277 ASSERT_MGD_MTX(ifmgd
);
2279 if (compare_ether_addr(mgmt
->da
, sdata
->vif
.addr
))
2280 return; /* ignore ProbeResp to foreign address */
2282 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2286 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2289 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2291 if (ifmgd
->associated
&&
2292 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
) == 0)
2293 ieee80211_reset_ap_probe(sdata
);
2295 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2296 compare_ether_addr(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)
2298 /* got probe response, continue with auth */
2299 printk(KERN_DEBUG
"%s: direct probe responded\n", sdata
->name
);
2300 ifmgd
->auth_data
->tries
= 0;
2301 ifmgd
->auth_data
->timeout
= jiffies
;
2302 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2307 * This is the canonical list of information elements we care about,
2308 * the filter code also gives us all changes to the Microsoft OUI
2309 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2311 * We implement beacon filtering in software since that means we can
2312 * avoid processing the frame here and in cfg80211, and userspace
2313 * will not be able to tell whether the hardware supports it or not.
2315 * XXX: This list needs to be dynamic -- userspace needs to be able to
2316 * add items it requires. It also needs to be able to tell us to
2317 * look out for other vendor IEs.
2319 static const u64 care_about_ies
=
2320 (1ULL << WLAN_EID_COUNTRY
) |
2321 (1ULL << WLAN_EID_ERP_INFO
) |
2322 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2323 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2324 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2325 (1ULL << WLAN_EID_HT_OPERATION
);
2327 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2328 struct ieee80211_mgmt
*mgmt
,
2330 struct ieee80211_rx_status
*rx_status
)
2332 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2333 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2335 struct ieee802_11_elems elems
;
2336 struct ieee80211_local
*local
= sdata
->local
;
2338 bool erp_valid
, directed_tim
= false;
2343 lockdep_assert_held(&ifmgd
->mtx
);
2345 /* Process beacon from the current BSS */
2346 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2350 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2353 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2354 compare_ether_addr(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)
2356 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2357 len
- baselen
, &elems
);
2359 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2361 ifmgd
->assoc_data
->have_beacon
= true;
2362 ifmgd
->assoc_data
->sent_assoc
= false;
2363 /* continue assoc process */
2364 ifmgd
->assoc_data
->timeout
= jiffies
;
2365 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2369 if (!ifmgd
->associated
||
2370 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2372 bssid
= ifmgd
->associated
->bssid
;
2374 /* Track average RSSI from the Beacon frames of the current AP */
2375 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2376 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2377 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2378 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2379 ifmgd
->last_cqm_event_signal
= 0;
2380 ifmgd
->count_beacon_signal
= 1;
2381 ifmgd
->last_ave_beacon_signal
= 0;
2383 ifmgd
->ave_beacon_signal
=
2384 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2385 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2386 ifmgd
->ave_beacon_signal
) / 16;
2387 ifmgd
->count_beacon_signal
++;
2390 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2391 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2392 int sig
= ifmgd
->ave_beacon_signal
;
2393 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2396 * if signal crosses either of the boundaries, invoke callback
2397 * with appropriate parameters
2399 if (sig
> ifmgd
->rssi_max_thold
&&
2400 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2401 ifmgd
->last_ave_beacon_signal
= sig
;
2402 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2403 } else if (sig
< ifmgd
->rssi_min_thold
&&
2404 (last_sig
>= ifmgd
->rssi_max_thold
||
2406 ifmgd
->last_ave_beacon_signal
= sig
;
2407 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2411 if (bss_conf
->cqm_rssi_thold
&&
2412 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2413 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2414 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2415 int last_event
= ifmgd
->last_cqm_event_signal
;
2416 int thold
= bss_conf
->cqm_rssi_thold
;
2417 int hyst
= bss_conf
->cqm_rssi_hyst
;
2419 (last_event
== 0 || sig
< last_event
- hyst
)) {
2420 ifmgd
->last_cqm_event_signal
= sig
;
2421 ieee80211_cqm_rssi_notify(
2423 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2425 } else if (sig
> thold
&&
2426 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2427 ifmgd
->last_cqm_event_signal
= sig
;
2428 ieee80211_cqm_rssi_notify(
2430 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2435 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2436 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2437 if (net_ratelimit()) {
2438 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
2439 "to a received beacon\n", sdata
->name
);
2442 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2443 mutex_lock(&local
->iflist_mtx
);
2444 ieee80211_recalc_ps(local
, -1);
2445 mutex_unlock(&local
->iflist_mtx
);
2449 * Push the beacon loss detection into the future since
2450 * we are processing a beacon from the AP just now.
2452 ieee80211_sta_reset_beacon_monitor(sdata
);
2454 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2455 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2456 len
- baselen
, &elems
,
2457 care_about_ies
, ncrc
);
2459 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2460 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2463 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2464 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2467 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2468 elems
.wmm_param_len
);
2471 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2473 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2474 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2475 ieee80211_hw_config(local
,
2476 IEEE80211_CONF_CHANGE_PS
);
2477 ieee80211_send_nullfunc(local
, sdata
, 0);
2478 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2479 local
->pspolling
= true;
2482 * Here is assumed that the driver will be
2483 * able to send ps-poll frame and receive a
2484 * response even though power save mode is
2485 * enabled, but some drivers might require
2486 * to disable power save here. This needs
2487 * to be investigated.
2489 ieee80211_send_pspoll(local
, sdata
);
2494 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2496 ifmgd
->beacon_crc
= ncrc
;
2497 ifmgd
->beacon_crc_valid
= true;
2499 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2501 erp_value
= elems
.erp_info
[0];
2505 changed
|= ieee80211_handle_bss_capability(sdata
,
2506 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2507 erp_valid
, erp_value
);
2510 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2511 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2512 struct sta_info
*sta
;
2513 struct ieee80211_supported_band
*sband
;
2514 u16 ap_ht_cap_flags
;
2518 sta
= sta_info_get(sdata
, bssid
);
2519 if (WARN_ON(!sta
)) {
2524 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2526 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2527 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2529 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
2533 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_operation
,
2534 bssid
, ap_ht_cap_flags
, true);
2537 /* Note: country IE parsing is done for us by cfg80211 */
2538 if (elems
.country_elem
) {
2539 /* TODO: IBSS also needs this */
2540 if (elems
.pwr_constr_elem
)
2541 ieee80211_handle_pwr_constr(sdata
,
2542 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2543 elems
.pwr_constr_elem
,
2544 elems
.pwr_constr_elem_len
);
2547 ieee80211_bss_info_change_notify(sdata
, changed
);
2550 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2551 struct sk_buff
*skb
)
2553 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2554 struct ieee80211_rx_status
*rx_status
;
2555 struct ieee80211_mgmt
*mgmt
;
2556 struct cfg80211_bss
*bss
= NULL
;
2557 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2560 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2561 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2562 fc
= le16_to_cpu(mgmt
->frame_control
);
2564 mutex_lock(&ifmgd
->mtx
);
2566 switch (fc
& IEEE80211_FCTL_STYPE
) {
2567 case IEEE80211_STYPE_BEACON
:
2568 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2570 case IEEE80211_STYPE_PROBE_RESP
:
2571 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2573 case IEEE80211_STYPE_AUTH
:
2574 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2576 case IEEE80211_STYPE_DEAUTH
:
2577 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2579 case IEEE80211_STYPE_DISASSOC
:
2580 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2582 case IEEE80211_STYPE_ASSOC_RESP
:
2583 case IEEE80211_STYPE_REASSOC_RESP
:
2584 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2586 case IEEE80211_STYPE_ACTION
:
2587 switch (mgmt
->u
.action
.category
) {
2588 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2589 ieee80211_sta_process_chanswitch(sdata
,
2590 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2591 (void *)ifmgd
->associated
->priv
,
2592 rx_status
->mactime
);
2596 mutex_unlock(&ifmgd
->mtx
);
2602 case RX_MGMT_CFG80211_DEAUTH
:
2603 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2605 case RX_MGMT_CFG80211_DISASSOC
:
2606 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2608 case RX_MGMT_CFG80211_RX_AUTH
:
2609 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2611 case RX_MGMT_CFG80211_RX_ASSOC
:
2612 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2614 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2615 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2618 WARN(1, "unexpected: %d", rma
);
2622 static void ieee80211_sta_timer(unsigned long data
)
2624 struct ieee80211_sub_if_data
*sdata
=
2625 (struct ieee80211_sub_if_data
*) data
;
2626 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2627 struct ieee80211_local
*local
= sdata
->local
;
2629 if (local
->quiescing
) {
2630 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2634 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2637 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2638 u8
*bssid
, u8 reason
)
2640 struct ieee80211_local
*local
= sdata
->local
;
2641 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2642 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2644 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2645 IEEE80211_STA_BEACON_POLL
);
2647 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2649 mutex_unlock(&ifmgd
->mtx
);
2652 * must be outside lock due to cfg80211,
2653 * but that's not a problem.
2655 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2657 mutex_lock(&local
->mtx
);
2658 ieee80211_recalc_idle(local
);
2659 mutex_unlock(&local
->mtx
);
2661 mutex_lock(&ifmgd
->mtx
);
2664 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2666 struct ieee80211_local
*local
= sdata
->local
;
2667 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2668 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2670 lockdep_assert_held(&ifmgd
->mtx
);
2672 if (WARN_ON_ONCE(!auth_data
))
2677 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2678 printk(KERN_DEBUG
"%s: authentication with %pM timed out\n",
2679 sdata
->name
, auth_data
->bss
->bssid
);
2682 * Most likely AP is not in the range so remove the
2683 * bss struct for that AP.
2685 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2690 if (auth_data
->bss
->proberesp_ies
) {
2691 printk(KERN_DEBUG
"%s: send auth to %pM (try %d/%d)\n",
2692 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2693 IEEE80211_AUTH_MAX_TRIES
);
2695 auth_data
->expected_transaction
= 2;
2696 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2697 auth_data
->ie
, auth_data
->ie_len
,
2698 auth_data
->bss
->bssid
,
2699 auth_data
->bss
->bssid
, NULL
, 0, 0);
2703 printk(KERN_DEBUG
"%s: direct probe to %pM (try %d/%i)\n",
2704 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2705 IEEE80211_AUTH_MAX_TRIES
);
2707 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2711 * Direct probe is sent to broadcast address as some APs
2712 * will not answer to direct packet in unassociated state.
2714 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2715 NULL
, 0, (u32
) -1, true, false);
2718 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2719 run_again(ifmgd
, auth_data
->timeout
);
2724 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2726 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2727 struct ieee80211_local
*local
= sdata
->local
;
2729 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2731 assoc_data
->tries
++;
2732 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2733 printk(KERN_DEBUG
"%s: association with %pM timed out\n",
2734 sdata
->name
, assoc_data
->bss
->bssid
);
2737 * Most likely AP is not in the range so remove the
2738 * bss struct for that AP.
2740 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2745 printk(KERN_DEBUG
"%s: associate with %pM (try %d/%d)\n",
2746 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2747 IEEE80211_ASSOC_MAX_TRIES
);
2748 ieee80211_send_assoc(sdata
);
2750 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2751 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2756 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2758 struct ieee80211_local
*local
= sdata
->local
;
2759 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2761 mutex_lock(&ifmgd
->mtx
);
2763 if (ifmgd
->auth_data
&&
2764 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2765 if (ifmgd
->auth_data
->done
) {
2767 * ok ... we waited for assoc but userspace didn't,
2768 * so let's just kill the auth data
2770 ieee80211_destroy_auth_data(sdata
, false);
2771 } else if (ieee80211_probe_auth(sdata
)) {
2774 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2776 ieee80211_destroy_auth_data(sdata
, false);
2778 mutex_unlock(&ifmgd
->mtx
);
2779 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2780 mutex_lock(&ifmgd
->mtx
);
2782 } else if (ifmgd
->auth_data
)
2783 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2785 if (ifmgd
->assoc_data
&&
2786 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2787 if (!ifmgd
->assoc_data
->have_beacon
||
2788 ieee80211_do_assoc(sdata
)) {
2791 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2793 ieee80211_destroy_assoc_data(sdata
, false);
2795 mutex_unlock(&ifmgd
->mtx
);
2796 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2797 mutex_lock(&ifmgd
->mtx
);
2799 } else if (ifmgd
->assoc_data
)
2800 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2802 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2803 IEEE80211_STA_CONNECTION_POLL
) &&
2804 ifmgd
->associated
) {
2808 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2810 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2811 max_tries
= max_nullfunc_tries
;
2813 max_tries
= max_probe_tries
;
2815 /* ACK received for nullfunc probing frame */
2816 if (!ifmgd
->probe_send_count
)
2817 ieee80211_reset_ap_probe(sdata
);
2818 else if (ifmgd
->nullfunc_failed
) {
2819 if (ifmgd
->probe_send_count
< max_tries
) {
2820 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2821 wiphy_debug(local
->hw
.wiphy
,
2822 "%s: No ack for nullfunc frame to"
2823 " AP %pM, try %d/%i\n",
2825 ifmgd
->probe_send_count
, max_tries
);
2827 ieee80211_mgd_probe_ap_send(sdata
);
2829 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2830 wiphy_debug(local
->hw
.wiphy
,
2831 "%s: No ack for nullfunc frame to"
2832 " AP %pM, disconnecting.\n",
2833 sdata
->name
, bssid
);
2835 ieee80211_sta_connection_lost(sdata
, bssid
,
2836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2838 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2839 run_again(ifmgd
, ifmgd
->probe_timeout
);
2840 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2841 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2842 wiphy_debug(local
->hw
.wiphy
,
2843 "%s: Failed to send nullfunc to AP %pM"
2844 " after %dms, disconnecting.\n",
2846 bssid
, probe_wait_ms
);
2848 ieee80211_sta_connection_lost(sdata
, bssid
,
2849 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2850 } else if (ifmgd
->probe_send_count
< max_tries
) {
2851 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2852 wiphy_debug(local
->hw
.wiphy
,
2853 "%s: No probe response from AP %pM"
2854 " after %dms, try %d/%i\n",
2856 bssid
, probe_wait_ms
,
2857 ifmgd
->probe_send_count
, max_tries
);
2859 ieee80211_mgd_probe_ap_send(sdata
);
2862 * We actually lost the connection ... or did we?
2865 wiphy_debug(local
->hw
.wiphy
,
2866 "%s: No probe response from AP %pM"
2867 " after %dms, disconnecting.\n",
2869 bssid
, probe_wait_ms
);
2871 ieee80211_sta_connection_lost(sdata
, bssid
,
2872 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2876 mutex_unlock(&ifmgd
->mtx
);
2878 mutex_lock(&local
->mtx
);
2879 ieee80211_recalc_idle(local
);
2880 mutex_unlock(&local
->mtx
);
2883 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2885 struct ieee80211_sub_if_data
*sdata
=
2886 (struct ieee80211_sub_if_data
*) data
;
2887 struct ieee80211_local
*local
= sdata
->local
;
2889 if (local
->quiescing
)
2892 ieee80211_queue_work(&sdata
->local
->hw
,
2893 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2896 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2898 struct ieee80211_sub_if_data
*sdata
=
2899 (struct ieee80211_sub_if_data
*) data
;
2900 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2901 struct ieee80211_local
*local
= sdata
->local
;
2903 if (local
->quiescing
)
2906 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2909 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2911 struct ieee80211_sub_if_data
*sdata
=
2912 container_of(work
, struct ieee80211_sub_if_data
,
2913 u
.mgd
.monitor_work
);
2915 ieee80211_mgd_probe_ap(sdata
, false);
2918 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2922 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2923 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2924 IEEE80211_STA_CONNECTION_POLL
);
2926 /* let's probe the connection once */
2927 flags
= sdata
->local
->hw
.flags
;
2928 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2929 ieee80211_queue_work(&sdata
->local
->hw
,
2930 &sdata
->u
.mgd
.monitor_work
);
2931 /* and do all the other regular work too */
2932 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2937 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2939 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2942 * we need to use atomic bitops for the running bits
2943 * only because both timers might fire at the same
2944 * time -- the code here is properly synchronised.
2947 cancel_work_sync(&ifmgd
->request_smps_work
);
2949 cancel_work_sync(&ifmgd
->monitor_work
);
2950 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2951 if (del_timer_sync(&ifmgd
->timer
))
2952 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2954 cancel_work_sync(&ifmgd
->chswitch_work
);
2955 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2956 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2958 /* these will just be re-established on connection */
2959 del_timer_sync(&ifmgd
->conn_mon_timer
);
2960 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2963 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2965 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2967 if (!ifmgd
->associated
)
2970 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2971 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2972 mutex_lock(&ifmgd
->mtx
);
2973 if (ifmgd
->associated
) {
2974 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2975 wiphy_debug(sdata
->local
->hw
.wiphy
,
2976 "%s: driver requested disconnect after resume.\n",
2979 ieee80211_sta_connection_lost(sdata
,
2980 ifmgd
->associated
->bssid
,
2981 WLAN_REASON_UNSPECIFIED
);
2982 mutex_unlock(&ifmgd
->mtx
);
2985 mutex_unlock(&ifmgd
->mtx
);
2988 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2989 add_timer(&ifmgd
->timer
);
2990 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2991 add_timer(&ifmgd
->chswitch_timer
);
2992 ieee80211_sta_reset_beacon_monitor(sdata
);
2993 ieee80211_restart_sta_timer(sdata
);
2997 /* interface setup */
2998 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3000 struct ieee80211_if_managed
*ifmgd
;
3002 ifmgd
= &sdata
->u
.mgd
;
3003 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3004 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3005 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3006 ieee80211_beacon_connection_loss_work
);
3007 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3008 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3009 (unsigned long) sdata
);
3010 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3011 (unsigned long) sdata
);
3012 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3013 (unsigned long) sdata
);
3014 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3015 (unsigned long) sdata
);
3018 ifmgd
->powersave
= sdata
->wdev
.ps
;
3019 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3020 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3022 mutex_init(&ifmgd
->mtx
);
3024 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3025 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3027 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3030 /* scan finished notification */
3031 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3033 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
3035 /* Restart STA timers */
3037 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3038 ieee80211_restart_sta_timer(sdata
);
3042 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3043 unsigned long data
, void *dummy
)
3045 s32 latency_usec
= (s32
) data
;
3046 struct ieee80211_local
*local
=
3047 container_of(nb
, struct ieee80211_local
,
3048 network_latency_notifier
);
3050 mutex_lock(&local
->iflist_mtx
);
3051 ieee80211_recalc_ps(local
, latency_usec
);
3052 mutex_unlock(&local
->iflist_mtx
);
3057 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3058 struct cfg80211_bss
*cbss
, bool assoc
)
3060 struct ieee80211_local
*local
= sdata
->local
;
3061 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3062 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3063 struct sta_info
*sta
;
3064 bool have_sta
= false;
3067 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3072 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3077 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3082 mutex_lock(&local
->mtx
);
3083 ieee80211_recalc_idle(sdata
->local
);
3084 mutex_unlock(&local
->mtx
);
3086 /* switch to the right channel */
3087 local
->oper_channel
= cbss
->channel
;
3088 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3091 struct ieee80211_supported_band
*sband
;
3092 u32 rates
= 0, basic_rates
= 0;
3093 bool have_higher_than_11mbit
;
3094 int min_rate
= INT_MAX
, min_rate_index
= -1;
3096 sband
= sdata
->local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
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 "%s: No basic rates, using min rate instead.\n",
3116 basic_rates
= BIT(min_rate_index
);
3119 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3120 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3122 /* cf. IEEE 802.11 9.2.12 */
3123 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3124 have_higher_than_11mbit
)
3125 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3127 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3129 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3131 /* tell driver about BSSID and basic rates */
3132 ieee80211_bss_info_change_notify(sdata
,
3133 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3136 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3138 err
= sta_info_insert(sta
);
3142 "%s: failed to insert STA entry for the AP (error %d)\n",
3147 WARN_ON_ONCE(compare_ether_addr(ifmgd
->bssid
, cbss
->bssid
));
3153 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3154 struct cfg80211_auth_request
*req
)
3156 struct ieee80211_local
*local
= sdata
->local
;
3157 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3158 struct ieee80211_mgd_auth_data
*auth_data
;
3162 /* prepare auth data structure */
3164 switch (req
->auth_type
) {
3165 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3166 auth_alg
= WLAN_AUTH_OPEN
;
3168 case NL80211_AUTHTYPE_SHARED_KEY
:
3169 if (IS_ERR(local
->wep_tx_tfm
))
3171 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3173 case NL80211_AUTHTYPE_FT
:
3174 auth_alg
= WLAN_AUTH_FT
;
3176 case NL80211_AUTHTYPE_NETWORK_EAP
:
3177 auth_alg
= WLAN_AUTH_LEAP
;
3183 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3187 auth_data
->bss
= req
->bss
;
3189 if (req
->ie
&& req
->ie_len
) {
3190 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3191 auth_data
->ie_len
= req
->ie_len
;
3194 if (req
->key
&& req
->key_len
) {
3195 auth_data
->key_len
= req
->key_len
;
3196 auth_data
->key_idx
= req
->key_idx
;
3197 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3200 auth_data
->algorithm
= auth_alg
;
3202 /* try to authenticate/probe */
3204 mutex_lock(&ifmgd
->mtx
);
3206 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3207 ifmgd
->assoc_data
) {
3212 if (ifmgd
->auth_data
)
3213 ieee80211_destroy_auth_data(sdata
, false);
3215 /* prep auth_data so we don't go into idle on disassoc */
3216 ifmgd
->auth_data
= auth_data
;
3218 if (ifmgd
->associated
)
3219 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3221 printk(KERN_DEBUG
"%s: authenticate with %pM\n",
3222 sdata
->name
, req
->bss
->bssid
);
3224 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3228 err
= ieee80211_probe_auth(sdata
);
3230 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3234 /* hold our own reference */
3235 cfg80211_ref_bss(auth_data
->bss
);
3240 ifmgd
->auth_data
= NULL
;
3244 mutex_unlock(&ifmgd
->mtx
);
3249 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3250 struct cfg80211_assoc_request
*req
)
3252 struct ieee80211_local
*local
= sdata
->local
;
3253 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3254 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3255 struct ieee80211_mgd_assoc_data
*assoc_data
;
3256 struct ieee80211_supported_band
*sband
;
3260 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3264 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3268 mutex_lock(&ifmgd
->mtx
);
3270 if (ifmgd
->associated
)
3271 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3273 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3278 if (ifmgd
->assoc_data
) {
3283 if (ifmgd
->auth_data
) {
3286 /* keep sta info, bssid if matching */
3287 match
= compare_ether_addr(ifmgd
->bssid
, req
->bss
->bssid
) == 0;
3288 ieee80211_destroy_auth_data(sdata
, match
);
3291 /* prepare assoc data */
3293 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3294 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3296 ifmgd
->beacon_crc_valid
= false;
3299 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3300 * We still associate in non-HT mode (11a/b/g) if any one of these
3301 * ciphers is configured as pairwise.
3302 * We can set this to true for non-11n hardware, that'll be checked
3303 * separately along with the peer capabilities.
3305 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
3306 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3307 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3308 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
3309 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3311 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3312 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3314 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3315 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3316 if (!sband
->ht_cap
.ht_supported
||
3317 local
->hw
.queues
< 4 || !bss
->wmm_used
)
3318 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3320 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3321 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3322 sizeof(ifmgd
->ht_capa_mask
));
3324 if (req
->ie
&& req
->ie_len
) {
3325 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3326 assoc_data
->ie_len
= req
->ie_len
;
3329 assoc_data
->bss
= req
->bss
;
3331 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3332 if (ifmgd
->powersave
)
3333 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3335 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3337 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3339 assoc_data
->capability
= req
->bss
->capability
;
3340 assoc_data
->wmm
= bss
->wmm_used
&& (local
->hw
.queues
>= 4);
3341 assoc_data
->supp_rates
= bss
->supp_rates
;
3342 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3343 assoc_data
->ht_operation_ie
=
3344 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3346 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3347 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3348 assoc_data
->uapsd
= true;
3349 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3351 assoc_data
->uapsd
= false;
3352 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3355 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3356 assoc_data
->ssid_len
= ssidie
[1];
3358 if (req
->prev_bssid
)
3359 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3362 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3363 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3365 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3366 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3369 if (req
->crypto
.control_port
)
3370 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3372 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3374 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3375 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3377 /* kick off associate process */
3379 ifmgd
->assoc_data
= assoc_data
;
3381 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3385 if (!bss
->dtim_period
&&
3386 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3388 * Wait up to one beacon interval ...
3389 * should this be more if we miss one?
3391 printk(KERN_DEBUG
"%s: waiting for beacon from %pM\n",
3392 sdata
->name
, ifmgd
->bssid
);
3393 assoc_data
->timeout
= jiffies
+
3394 TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3396 assoc_data
->have_beacon
= true;
3397 assoc_data
->sent_assoc
= false;
3398 assoc_data
->timeout
= jiffies
;
3400 run_again(ifmgd
, assoc_data
->timeout
);
3402 if (bss
->corrupt_data
) {
3403 char *corrupt_type
= "data";
3404 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3405 if (bss
->corrupt_data
&
3406 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3407 corrupt_type
= "beacon and probe response";
3409 corrupt_type
= "beacon";
3410 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3411 corrupt_type
= "probe response";
3412 printk(KERN_DEBUG
"%s: associating with AP with corrupt %s\n",
3413 sdata
->name
, corrupt_type
);
3419 ifmgd
->assoc_data
= NULL
;
3423 mutex_unlock(&ifmgd
->mtx
);
3428 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3429 struct cfg80211_deauth_request
*req
)
3431 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3432 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3434 mutex_lock(&ifmgd
->mtx
);
3436 if (ifmgd
->auth_data
) {
3437 ieee80211_destroy_auth_data(sdata
, false);
3438 mutex_unlock(&ifmgd
->mtx
);
3443 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3444 sdata
->name
, req
->bssid
, req
->reason_code
);
3446 if (ifmgd
->associated
&&
3447 compare_ether_addr(ifmgd
->associated
->bssid
, req
->bssid
) == 0)
3448 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3449 req
->reason_code
, true, frame_buf
);
3451 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3452 IEEE80211_STYPE_DEAUTH
,
3453 req
->reason_code
, true,
3455 mutex_unlock(&ifmgd
->mtx
);
3457 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3459 mutex_lock(&sdata
->local
->mtx
);
3460 ieee80211_recalc_idle(sdata
->local
);
3461 mutex_unlock(&sdata
->local
->mtx
);
3466 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3467 struct cfg80211_disassoc_request
*req
)
3469 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3471 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3473 mutex_lock(&ifmgd
->mtx
);
3476 * cfg80211 should catch this ... but it's racy since
3477 * we can receive a disassoc frame, process it, hand it
3478 * to cfg80211 while that's in a locked section already
3479 * trying to tell us that the user wants to disconnect.
3481 if (ifmgd
->associated
!= req
->bss
) {
3482 mutex_unlock(&ifmgd
->mtx
);
3486 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
3487 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3489 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3490 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3491 req
->reason_code
, !req
->local_state_change
,
3493 mutex_unlock(&ifmgd
->mtx
);
3495 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3497 mutex_lock(&sdata
->local
->mtx
);
3498 ieee80211_recalc_idle(sdata
->local
);
3499 mutex_unlock(&sdata
->local
->mtx
);
3504 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data
*sdata
)
3506 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3508 mutex_lock(&ifmgd
->mtx
);
3509 if (ifmgd
->assoc_data
)
3510 ieee80211_destroy_assoc_data(sdata
, false);
3511 if (ifmgd
->auth_data
)
3512 ieee80211_destroy_auth_data(sdata
, false);
3513 del_timer_sync(&ifmgd
->timer
);
3514 mutex_unlock(&ifmgd
->mtx
);
3517 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3518 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3521 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3523 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3525 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3527 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
3529 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
3531 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3532 return sdata
->dev
->operstate
;
3534 EXPORT_SYMBOL(ieee80211_get_operstate
);