2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
122 lockdep_assert_held(&ifmgd
->mtx
);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
137 ASSERT_MGD_MTX(ifmgd
);
139 if (!timer_pending(&ifmgd
->timer
) ||
140 time_before(timeout
, ifmgd
->timer
.expires
))
141 mod_timer(&ifmgd
->timer
, timeout
);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
146 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
149 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
150 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 if (unlikely(!sdata
->u
.mgd
.associated
))
160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
163 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
164 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
166 ifmgd
->probe_send_count
= 0;
169 static int ecw2cw(int ecw
)
171 return (1 << ecw
) - 1;
174 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
175 struct ieee80211_ht_operation
*ht_oper
,
176 const u8
*bssid
, bool reconfig
)
178 struct ieee80211_local
*local
= sdata
->local
;
179 struct ieee80211_supported_band
*sband
;
180 struct sta_info
*sta
;
183 bool disable_40
= false;
185 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
187 switch (sdata
->vif
.bss_conf
.channel_type
) {
188 case NL80211_CHAN_HT40PLUS
:
189 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
192 case NL80211_CHAN_HT40MINUS
:
193 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
204 mutex_lock(&local
->sta_mtx
);
205 sta
= sta_info_get(sdata
, bssid
);
209 if (sta
&& !sta
->supports_40mhz
)
212 if (sta
&& (!reconfig
||
213 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
217 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
219 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
221 rate_control_rate_update(local
, sband
, sta
,
222 IEEE80211_RC_BW_CHANGED
);
224 mutex_unlock(&local
->sta_mtx
);
226 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
228 /* if bss configuration changed store the new one */
229 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
230 changed
|= BSS_CHANGED_HT
;
231 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
240 struct ieee80211_supported_band
*sband
,
246 for (i
= 0; i
< supp_rates_len
; i
++) {
247 int rate
= (supp_rates
[i
] & 0x7F) * 5;
249 for (j
= 0; j
< sband
->n_bitrates
; j
++)
250 if (sband
->bitrates
[j
].bitrate
== rate
) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
261 struct sk_buff
*skb
, const u8
*ht_oper_ie
,
262 struct ieee80211_supported_band
*sband
,
263 struct ieee80211_channel
*channel
,
264 enum ieee80211_smps_mode smps
)
266 struct ieee80211_ht_operation
*ht_oper
;
268 u32 flags
= channel
->flags
;
270 struct ieee80211_sta_ht_cap ht_cap
;
272 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
277 if (ht_oper_ie
[1] < sizeof(struct ieee80211_ht_operation
))
280 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
281 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
283 ht_oper
= (struct ieee80211_ht_operation
*)(ht_oper_ie
+ 2);
285 /* determine capability flags */
288 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
290 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
291 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
292 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
296 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
297 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
298 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
308 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
309 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
310 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
313 /* set SM PS mode properly */
314 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
316 case IEEE80211_SMPS_AUTOMATIC
:
317 case IEEE80211_SMPS_NUM_MODES
:
319 case IEEE80211_SMPS_OFF
:
320 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
321 IEEE80211_HT_CAP_SM_PS_SHIFT
;
323 case IEEE80211_SMPS_STATIC
:
324 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
325 IEEE80211_HT_CAP_SM_PS_SHIFT
;
327 case IEEE80211_SMPS_DYNAMIC
:
328 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
329 IEEE80211_HT_CAP_SM_PS_SHIFT
;
333 /* reserve and fill IE */
334 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
335 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
338 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
340 struct ieee80211_local
*local
= sdata
->local
;
341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
342 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
344 struct ieee80211_mgmt
*mgmt
;
346 size_t offset
= 0, noffset
;
347 int i
, count
, rates_len
, supp_rates_len
;
349 struct ieee80211_supported_band
*sband
;
352 lockdep_assert_held(&ifmgd
->mtx
);
354 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
356 if (assoc_data
->supp_rates_len
) {
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
363 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
364 assoc_data
->supp_rates_len
,
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
373 rates_len
= sband
->n_bitrates
;
376 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
377 sizeof(*mgmt
) + /* bit too much but doesn't matter */
378 2 + assoc_data
->ssid_len
+ /* SSID */
379 4 + rates_len
+ /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband
->n_channels
+ /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
383 assoc_data
->ie_len
+ /* extra IEs */
389 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
391 capab
= WLAN_CAPABILITY_ESS
;
393 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
394 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
395 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
396 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
397 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
400 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
401 capab
|= WLAN_CAPABILITY_PRIVACY
;
403 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
404 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
405 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
407 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
409 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
410 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
411 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
413 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
415 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
416 IEEE80211_STYPE_REASSOC_REQ
);
417 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
418 mgmt
->u
.reassoc_req
.listen_interval
=
419 cpu_to_le16(local
->hw
.conf
.listen_interval
);
420 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
424 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
425 IEEE80211_STYPE_ASSOC_REQ
);
426 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
427 mgmt
->u
.assoc_req
.listen_interval
=
428 cpu_to_le16(local
->hw
.conf
.listen_interval
);
432 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
433 *pos
++ = WLAN_EID_SSID
;
434 *pos
++ = assoc_data
->ssid_len
;
435 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
437 /* add all rates which were marked to be used above */
438 supp_rates_len
= rates_len
;
439 if (supp_rates_len
> 8)
442 pos
= skb_put(skb
, supp_rates_len
+ 2);
443 *pos
++ = WLAN_EID_SUPP_RATES
;
444 *pos
++ = supp_rates_len
;
447 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
448 if (BIT(i
) & rates
) {
449 int rate
= sband
->bitrates
[i
].bitrate
;
450 *pos
++ = (u8
) (rate
/ 5);
456 if (rates_len
> count
) {
457 pos
= skb_put(skb
, rates_len
- count
+ 2);
458 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
459 *pos
++ = rates_len
- count
;
461 for (i
++; i
< sband
->n_bitrates
; i
++) {
462 if (BIT(i
) & rates
) {
463 int rate
= sband
->bitrates
[i
].bitrate
;
464 *pos
++ = (u8
) (rate
/ 5);
469 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
470 /* 1. power capabilities */
471 pos
= skb_put(skb
, 4);
472 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
474 *pos
++ = 0; /* min tx power */
475 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
480 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
481 *pos
++ = 2 * sband
->n_channels
;
482 for (i
= 0; i
< sband
->n_channels
; i
++) {
483 *pos
++ = ieee80211_frequency_to_channel(
484 sband
->channels
[i
].center_freq
);
485 *pos
++ = 1; /* one channel in the subband*/
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
491 static const u8 before_ht
[] = {
494 WLAN_EID_EXT_SUPP_RATES
,
495 WLAN_EID_PWR_CAPABILITY
,
496 WLAN_EID_SUPPORTED_CHANNELS
,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
500 WLAN_EID_MOBILITY_DOMAIN
,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
503 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
504 before_ht
, ARRAY_SIZE(before_ht
),
506 pos
= skb_put(skb
, noffset
- offset
);
507 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
511 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
512 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ht_operation_ie
,
513 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
517 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
520 pos
= skb_put(skb
, noffset
- offset
);
521 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
525 if (assoc_data
->wmm
) {
526 if (assoc_data
->uapsd
) {
527 qos_info
= ifmgd
->uapsd_queues
;
528 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
534 pos
= skb_put(skb
, 9);
535 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
536 *pos
++ = 7; /* len */
537 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
540 *pos
++ = 2; /* WME */
541 *pos
++ = 0; /* WME info */
542 *pos
++ = 1; /* WME ver */
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
548 noffset
= assoc_data
->ie_len
;
549 pos
= skb_put(skb
, noffset
- offset
);
550 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
553 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
554 ieee80211_tx_skb(sdata
, skb
);
557 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
558 const u8
*bssid
, u16 stype
,
559 u16 reason
, bool send_frame
,
562 struct ieee80211_local
*local
= sdata
->local
;
563 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
565 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
568 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
569 mgmt
->duration
= 0; /* initialize only */
570 mgmt
->seq_ctrl
= 0; /* initialize only */
571 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
572 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
573 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
574 /* u.deauth.reason_code == u.disassoc.reason_code */
575 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
578 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
579 DEAUTH_DISASSOC_LEN
);
583 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
586 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
587 mgmt
, DEAUTH_DISASSOC_LEN
);
589 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
590 IEEE80211_SKB_CB(skb
)->flags
|=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
592 ieee80211_tx_skb(sdata
, skb
);
596 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
597 struct ieee80211_sub_if_data
*sdata
)
599 struct ieee80211_pspoll
*pspoll
;
602 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
606 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
607 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
609 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
610 ieee80211_tx_skb(sdata
, skb
);
613 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
614 struct ieee80211_sub_if_data
*sdata
,
618 struct ieee80211_hdr_3addr
*nullfunc
;
619 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
621 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
625 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
627 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
629 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
630 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
631 IEEE80211_STA_CONNECTION_POLL
))
632 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
634 ieee80211_tx_skb(sdata
, skb
);
637 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
638 struct ieee80211_sub_if_data
*sdata
)
641 struct ieee80211_hdr
*nullfunc
;
644 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
647 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
651 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
653 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
654 memset(nullfunc
, 0, 30);
655 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
656 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
657 nullfunc
->frame_control
= fc
;
658 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
659 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
660 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
661 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
663 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
664 ieee80211_tx_skb(sdata
, skb
);
667 /* spectrum management related things */
668 static void ieee80211_chswitch_work(struct work_struct
*work
)
670 struct ieee80211_sub_if_data
*sdata
=
671 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
672 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
674 if (!ieee80211_sdata_running(sdata
))
677 mutex_lock(&ifmgd
->mtx
);
678 if (!ifmgd
->associated
)
681 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
682 if (!sdata
->local
->ops
->channel_switch
) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata
->local
,
685 IEEE80211_CONF_CHANGE_CHANNEL
);
687 /* update the device channel directly */
688 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
691 /* XXX: shouldn't really modify cfg80211-owned data! */
692 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
694 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
695 IEEE80211_QUEUE_STOP_REASON_CSA
);
697 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
698 mutex_unlock(&ifmgd
->mtx
);
701 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
703 struct ieee80211_sub_if_data
*sdata
;
704 struct ieee80211_if_managed
*ifmgd
;
706 sdata
= vif_to_sdata(vif
);
707 ifmgd
= &sdata
->u
.mgd
;
709 trace_api_chswitch_done(sdata
, success
);
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
717 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
720 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
722 EXPORT_SYMBOL(ieee80211_chswitch_done
);
724 static void ieee80211_chswitch_timer(unsigned long data
)
726 struct ieee80211_sub_if_data
*sdata
=
727 (struct ieee80211_sub_if_data
*) data
;
728 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
730 if (sdata
->local
->quiescing
) {
731 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
735 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
738 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
739 struct ieee80211_channel_sw_ie
*sw_elem
,
740 struct ieee80211_bss
*bss
,
743 struct cfg80211_bss
*cbss
=
744 container_of((void *)bss
, struct cfg80211_bss
, priv
);
745 struct ieee80211_channel
*new_ch
;
746 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
747 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
748 cbss
->channel
->band
);
750 ASSERT_MGD_MTX(ifmgd
);
752 if (!ifmgd
->associated
)
755 if (sdata
->local
->scanning
)
758 /* Disregard subsequent beacons if we are already running a timer
761 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
764 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
765 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
768 sdata
->local
->csa_channel
= new_ch
;
770 if (sdata
->local
->ops
->channel_switch
) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch
;
773 memset(&ch_switch
, 0, sizeof(ch_switch
));
774 ch_switch
.timestamp
= timestamp
;
776 ch_switch
.block_tx
= true;
777 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
778 IEEE80211_QUEUE_STOP_REASON_CSA
);
780 ch_switch
.channel
= new_ch
;
781 ch_switch
.count
= sw_elem
->count
;
782 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
783 drv_channel_switch(sdata
->local
, &ch_switch
);
787 /* channel switch handled in software */
788 if (sw_elem
->count
<= 1) {
789 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
792 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
793 IEEE80211_QUEUE_STOP_REASON_CSA
);
794 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
795 mod_timer(&ifmgd
->chswitch_timer
,
797 msecs_to_jiffies(sw_elem
->count
*
798 cbss
->beacon_interval
));
802 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
803 u16 capab_info
, u8
*pwr_constr_elem
,
804 u8 pwr_constr_elem_len
)
806 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
808 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len
!= 1)
815 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
816 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
817 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
818 ieee80211_hw_config(sdata
->local
, 0);
822 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
824 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
825 struct ieee80211_local
*local
= sdata
->local
;
826 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
828 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
829 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
830 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
832 local
->disable_dynamic_ps
= false;
833 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
835 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
837 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
839 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
840 struct ieee80211_local
*local
= sdata
->local
;
841 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
843 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
844 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
845 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
847 local
->disable_dynamic_ps
= true;
848 conf
->dynamic_ps_timeout
= 0;
849 del_timer_sync(&local
->dynamic_ps_timer
);
850 ieee80211_queue_work(&local
->hw
,
851 &local
->dynamic_ps_enable_work
);
853 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
856 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
857 struct ieee80211_sub_if_data
*sdata
)
859 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
868 if (conf
->dynamic_ps_timeout
> 0 &&
869 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
870 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
871 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
873 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
874 ieee80211_send_nullfunc(local
, sdata
, 1);
876 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
877 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
880 conf
->flags
|= IEEE80211_CONF_PS
;
881 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
885 static void ieee80211_change_ps(struct ieee80211_local
*local
)
887 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
889 if (local
->ps_sdata
) {
890 ieee80211_enable_ps(local
, local
->ps_sdata
);
891 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
892 conf
->flags
&= ~IEEE80211_CONF_PS
;
893 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
894 del_timer_sync(&local
->dynamic_ps_timer
);
895 cancel_work_sync(&local
->dynamic_ps_enable_work
);
899 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
901 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
902 struct sta_info
*sta
= NULL
;
903 bool authorized
= false;
911 if (!mgd
->associated
)
914 if (!mgd
->associated
->beacon_ies
)
917 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
918 IEEE80211_STA_CONNECTION_POLL
))
922 sta
= sta_info_get(sdata
, mgd
->bssid
);
924 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
930 /* need to hold RTNL or interface lock */
931 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
933 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
937 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
938 local
->ps_sdata
= NULL
;
942 if (!list_empty(&local
->work_list
)) {
943 local
->ps_sdata
= NULL
;
947 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
948 if (!ieee80211_sdata_running(sdata
))
950 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
958 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
964 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
965 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
969 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
971 beaconint_us
= ieee80211_tu_to_usec(
972 found
->vif
.bss_conf
.beacon_int
);
974 timeout
= local
->dynamic_ps_forced_timeout
;
977 * Go to full PSM if the user configures a very low
978 * latency requirement.
979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
983 if (latency
> (1900 * USEC_PER_MSEC
) &&
984 latency
!= (2000 * USEC_PER_SEC
))
989 local
->dynamic_ps_user_timeout
= timeout
;
990 if (!local
->disable_dynamic_ps
)
991 conf
->dynamic_ps_timeout
=
992 local
->dynamic_ps_user_timeout
;
994 if (beaconint_us
> latency
) {
995 local
->ps_sdata
= NULL
;
997 struct ieee80211_bss
*bss
;
1001 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1002 dtimper
= bss
->dtim_period
;
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1007 else if (dtimper
> 1)
1008 maxslp
= min_t(int, dtimper
,
1009 latency
/ beaconint_us
);
1011 local
->hw
.conf
.max_sleep_period
= maxslp
;
1012 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1013 local
->ps_sdata
= found
;
1016 local
->ps_sdata
= NULL
;
1020 ieee80211_change_ps(local
);
1023 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1025 struct ieee80211_local
*local
=
1026 container_of(work
, struct ieee80211_local
,
1027 dynamic_ps_disable_work
);
1029 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1030 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1031 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1034 ieee80211_wake_queues_by_reason(&local
->hw
,
1035 IEEE80211_QUEUE_STOP_REASON_PS
);
1038 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1040 struct ieee80211_local
*local
=
1041 container_of(work
, struct ieee80211_local
,
1042 dynamic_ps_enable_work
);
1043 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1044 struct ieee80211_if_managed
*ifmgd
;
1045 unsigned long flags
;
1048 /* can only happen when PS was just disabled anyway */
1052 ifmgd
= &sdata
->u
.mgd
;
1054 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1057 if (!local
->disable_dynamic_ps
&&
1058 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local
)) {
1061 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1063 local
->hw
.conf
.dynamic_ps_timeout
));
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1072 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1073 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1074 if (local
->queue_stop_reasons
[q
]) {
1075 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1077 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1079 local
->hw
.conf
.dynamic_ps_timeout
));
1083 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1086 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1087 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1088 netif_tx_stop_all_queues(sdata
->dev
);
1090 if (drv_tx_frames_pending(local
))
1091 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1093 local
->hw
.conf
.dynamic_ps_timeout
));
1095 ieee80211_send_nullfunc(local
, sdata
, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local
, false);
1101 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1102 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1103 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1104 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1105 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1106 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1109 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1110 netif_tx_wake_all_queues(sdata
->dev
);
1113 void ieee80211_dynamic_ps_timer(unsigned long data
)
1115 struct ieee80211_local
*local
= (void *) data
;
1117 if (local
->quiescing
|| local
->suspended
)
1120 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1124 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1125 struct ieee80211_sub_if_data
*sdata
,
1126 u8
*wmm_param
, size_t wmm_param_len
)
1128 struct ieee80211_tx_queue_params params
;
1129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1132 u8
*pos
, uapsd_queues
= 0;
1134 if (!local
->ops
->conf_tx
)
1137 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1143 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1146 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1147 uapsd_queues
= ifmgd
->uapsd_queues
;
1149 count
= wmm_param
[6] & 0x0f;
1150 if (count
== ifmgd
->wmm_last_param_set
)
1152 ifmgd
->wmm_last_param_set
= count
;
1154 pos
= wmm_param
+ 8;
1155 left
= wmm_param_len
- 8;
1157 memset(¶ms
, 0, sizeof(params
));
1160 for (; left
>= 4; left
-= 4, pos
+= 4) {
1161 int aci
= (pos
[0] >> 5) & 0x03;
1162 int acm
= (pos
[0] >> 4) & 0x01;
1170 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1171 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1177 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1178 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1184 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1185 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1192 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1193 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1198 params
.aifs
= pos
[0] & 0x0f;
1199 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1200 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1201 params
.txop
= get_unaligned_le16(pos
+ 2);
1202 params
.uapsd
= uapsd
;
1204 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1205 wiphy_debug(local
->hw
.wiphy
,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1209 params
.aifs
, params
.cw_min
, params
.cw_max
,
1210 params
.txop
, params
.uapsd
);
1212 sdata
->tx_conf
[queue
] = params
;
1213 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1214 wiphy_debug(local
->hw
.wiphy
,
1215 "failed to set TX queue parameters for queue %d\n",
1219 /* enable WMM or activate new settings */
1220 sdata
->vif
.bss_conf
.qos
= true;
1223 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1224 u16 capab
, bool erp_valid
, u8 erp
)
1226 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1228 bool use_protection
;
1229 bool use_short_preamble
;
1230 bool use_short_slot
;
1233 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1234 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1236 use_protection
= false;
1237 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1240 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1241 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1242 use_short_slot
= true;
1244 if (use_protection
!= bss_conf
->use_cts_prot
) {
1245 bss_conf
->use_cts_prot
= use_protection
;
1246 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1249 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1250 bss_conf
->use_short_preamble
= use_short_preamble
;
1251 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1254 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1255 bss_conf
->use_short_slot
= use_short_slot
;
1256 changed
|= BSS_CHANGED_ERP_SLOT
;
1262 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1263 struct cfg80211_bss
*cbss
,
1264 u32 bss_info_changed
)
1266 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1267 struct ieee80211_local
*local
= sdata
->local
;
1268 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1270 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1271 /* set timing information */
1272 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1273 bss_conf
->last_tsf
= cbss
->tsf
;
1275 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1276 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1277 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1279 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1282 sdata
->u
.mgd
.associated
= cbss
;
1283 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1285 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1287 /* just to be sure */
1288 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1289 IEEE80211_STA_BEACON_POLL
);
1291 ieee80211_led_assoc(local
, 1);
1293 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1294 bss_conf
->dtim_period
= bss
->dtim_period
;
1296 bss_conf
->dtim_period
= 0;
1298 bss_conf
->assoc
= 1;
1300 /* Tell the driver to monitor connection quality (if supported) */
1301 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1302 bss_conf
->cqm_rssi_thold
)
1303 bss_info_changed
|= BSS_CHANGED_CQM
;
1305 /* Enable ARP filtering */
1306 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1307 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1308 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1311 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1313 mutex_lock(&local
->iflist_mtx
);
1314 ieee80211_recalc_ps(local
, -1);
1315 ieee80211_recalc_smps(local
);
1316 mutex_unlock(&local
->iflist_mtx
);
1318 netif_tx_start_all_queues(sdata
->dev
);
1319 netif_carrier_on(sdata
->dev
);
1322 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1323 u16 stype
, u16 reason
, bool tx
,
1326 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1327 struct ieee80211_local
*local
= sdata
->local
;
1328 struct sta_info
*sta
;
1332 ASSERT_MGD_MTX(ifmgd
);
1334 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1337 if (WARN_ON(!ifmgd
->associated
))
1340 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1342 ifmgd
->associated
= NULL
;
1343 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1359 netif_tx_stop_all_queues(sdata
->dev
);
1360 netif_carrier_off(sdata
->dev
);
1362 mutex_lock(&local
->sta_mtx
);
1363 sta
= sta_info_get(sdata
, bssid
);
1365 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1366 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1368 mutex_unlock(&local
->sta_mtx
);
1370 /* deauthenticate/disassociate now */
1371 if (tx
|| frame_buf
)
1372 ieee80211_send_deauth_disassoc(sdata
, bssid
, stype
, reason
,
1375 /* flush out frame */
1377 drv_flush(local
, false);
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local
, sdata
);
1382 /* finally reset all BSS / config parameters */
1383 changed
|= ieee80211_reset_erp_info(sdata
);
1385 ieee80211_led_assoc(local
, 0);
1386 changed
|= BSS_CHANGED_ASSOC
;
1387 sdata
->vif
.bss_conf
.assoc
= false;
1389 /* on the next assoc, re-program HT parameters */
1390 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1391 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1393 local
->power_constr_level
= 0;
1395 del_timer_sync(&local
->dynamic_ps_timer
);
1396 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1398 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1399 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1400 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1402 local
->ps_sdata
= NULL
;
1404 /* Disable ARP filtering */
1405 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1406 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1407 changed
|= BSS_CHANGED_ARP_FILTER
;
1410 sdata
->vif
.bss_conf
.qos
= false;
1411 changed
|= BSS_CHANGED_QOS
;
1413 /* The BSSID (not really interesting) and HT changed */
1414 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1415 ieee80211_bss_info_change_notify(sdata
, changed
);
1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1419 ieee80211_hw_config(local
, 0);
1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata
, false);
1424 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1425 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1426 del_timer_sync(&sdata
->u
.mgd
.timer
);
1427 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1430 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1431 struct ieee80211_hdr
*hdr
)
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
1441 if (is_multicast_ether_addr(hdr
->addr1
))
1444 ieee80211_sta_reset_conn_monitor(sdata
);
1447 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1449 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1450 struct ieee80211_local
*local
= sdata
->local
;
1452 mutex_lock(&local
->mtx
);
1453 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1454 IEEE80211_STA_CONNECTION_POLL
))) {
1455 mutex_unlock(&local
->mtx
);
1459 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1460 IEEE80211_STA_BEACON_POLL
);
1462 mutex_lock(&local
->iflist_mtx
);
1463 ieee80211_recalc_ps(local
, -1);
1464 mutex_unlock(&local
->iflist_mtx
);
1466 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1470 * We've received a probe response, but are not sure whether
1471 * we have or will be receiving any beacons or data, so let's
1472 * schedule the timers again, just in case.
1474 ieee80211_sta_reset_beacon_monitor(sdata
);
1476 mod_timer(&ifmgd
->conn_mon_timer
,
1477 round_jiffies_up(jiffies
+
1478 IEEE80211_CONNECTION_IDLE_TIME
));
1480 ieee80211_run_deferred_scan(local
);
1481 mutex_unlock(&local
->mtx
);
1484 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1485 struct ieee80211_hdr
*hdr
, bool ack
)
1487 if (!ieee80211_is_data(hdr
->frame_control
))
1491 ieee80211_sta_reset_conn_monitor(sdata
);
1493 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1494 sdata
->u
.mgd
.probe_send_count
> 0) {
1496 sdata
->u
.mgd
.probe_send_count
= 0;
1498 sdata
->u
.mgd
.nullfunc_failed
= true;
1499 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1503 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1505 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1507 u8
*dst
= ifmgd
->associated
->bssid
;
1508 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1511 * Try sending broadcast probe requests for the last three
1512 * probe requests after the first ones failed since some
1513 * buggy APs only support broadcast probe requests.
1515 if (ifmgd
->probe_send_count
>= unicast_limit
)
1519 * When the hardware reports an accurate Tx ACK status, it's
1520 * better to send a nullfunc frame instead of a probe request,
1521 * as it will kick us off the AP quickly if we aren't associated
1522 * anymore. The timeout will be reset if the frame is ACKed by
1525 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1526 ifmgd
->nullfunc_failed
= false;
1527 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1531 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1532 if (WARN_ON_ONCE(ssid
== NULL
))
1537 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1538 0, (u32
) -1, true, false);
1541 ifmgd
->probe_send_count
++;
1542 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1543 run_again(ifmgd
, ifmgd
->probe_timeout
);
1544 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1545 drv_flush(sdata
->local
, false);
1548 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1551 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1552 bool already
= false;
1554 if (!ieee80211_sdata_running(sdata
))
1557 mutex_lock(&ifmgd
->mtx
);
1559 if (!ifmgd
->associated
)
1562 mutex_lock(&sdata
->local
->mtx
);
1564 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1565 mutex_unlock(&sdata
->local
->mtx
);
1569 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1571 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1586 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1587 IEEE80211_STA_CONNECTION_POLL
))
1591 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1593 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1595 mutex_unlock(&sdata
->local
->mtx
);
1600 mutex_lock(&sdata
->local
->iflist_mtx
);
1601 ieee80211_recalc_ps(sdata
->local
, -1);
1602 mutex_unlock(&sdata
->local
->iflist_mtx
);
1604 ifmgd
->probe_send_count
= 0;
1605 ieee80211_mgd_probe_ap_send(sdata
);
1607 mutex_unlock(&ifmgd
->mtx
);
1610 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1611 struct ieee80211_vif
*vif
)
1613 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1614 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1615 struct sk_buff
*skb
;
1619 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1622 ASSERT_MGD_MTX(ifmgd
);
1624 if (!ifmgd
->associated
)
1627 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1628 if (WARN_ON_ONCE(ssid
== NULL
))
1633 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1634 (u32
) -1, ssid
+ 2, ssid_len
,
1639 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1641 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1643 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1644 struct ieee80211_local
*local
= sdata
->local
;
1646 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1648 mutex_lock(&ifmgd
->mtx
);
1649 if (!ifmgd
->associated
) {
1650 mutex_unlock(&ifmgd
->mtx
);
1654 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1656 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1657 sdata
->name
, bssid
);
1659 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1662 mutex_unlock(&ifmgd
->mtx
);
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1668 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1670 mutex_lock(&local
->mtx
);
1671 ieee80211_recalc_idle(local
);
1672 mutex_unlock(&local
->mtx
);
1675 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1677 struct ieee80211_sub_if_data
*sdata
=
1678 container_of(work
, struct ieee80211_sub_if_data
,
1679 u
.mgd
.beacon_connection_loss_work
);
1680 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1681 struct sta_info
*sta
;
1683 if (ifmgd
->associated
) {
1685 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1687 sta
->beacon_loss_count
++;
1691 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1692 __ieee80211_connection_loss(sdata
);
1694 ieee80211_mgd_probe_ap(sdata
, true);
1697 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1699 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1700 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1702 trace_api_beacon_loss(sdata
);
1704 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1705 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1707 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1709 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1711 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1712 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1714 trace_api_connection_loss(sdata
);
1716 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1717 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1719 EXPORT_SYMBOL(ieee80211_connection_loss
);
1722 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1725 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1727 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1730 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1732 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1733 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1736 cfg80211_put_bss(auth_data
->bss
);
1738 sdata
->u
.mgd
.auth_data
= NULL
;
1741 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1742 struct ieee80211_mgmt
*mgmt
, size_t len
)
1744 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1746 struct ieee802_11_elems elems
;
1748 pos
= mgmt
->u
.auth
.variable
;
1749 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1750 if (!elems
.challenge
)
1752 auth_data
->expected_transaction
= 4;
1753 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1754 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1755 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1756 auth_data
->key
, auth_data
->key_len
,
1757 auth_data
->key_idx
);
1760 static enum rx_mgmt_action __must_check
1761 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1762 struct ieee80211_mgmt
*mgmt
, size_t len
)
1764 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1766 u16 auth_alg
, auth_transaction
, status_code
;
1767 struct sta_info
*sta
;
1769 lockdep_assert_held(&ifmgd
->mtx
);
1772 return RX_MGMT_NONE
;
1774 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1775 return RX_MGMT_NONE
;
1777 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1779 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1780 return RX_MGMT_NONE
;
1782 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1783 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1784 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1786 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1787 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1788 return RX_MGMT_NONE
;
1790 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1791 printk(KERN_DEBUG
"%s: %pM denied authentication (status %d)\n",
1792 sdata
->name
, mgmt
->sa
, status_code
);
1796 switch (ifmgd
->auth_data
->algorithm
) {
1797 case WLAN_AUTH_OPEN
:
1798 case WLAN_AUTH_LEAP
:
1801 case WLAN_AUTH_SHARED_KEY
:
1802 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1803 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1804 /* need another frame */
1805 return RX_MGMT_NONE
;
1809 WARN_ONCE(1, "invalid auth alg %d",
1810 ifmgd
->auth_data
->algorithm
);
1811 return RX_MGMT_NONE
;
1814 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->name
);
1816 ifmgd
->auth_data
->done
= true;
1817 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1818 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1820 /* move station state to auth */
1821 mutex_lock(&sdata
->local
->sta_mtx
);
1822 sta
= sta_info_get(sdata
, bssid
);
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1827 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1828 printk(KERN_DEBUG
"%s: failed moving %pM to auth\n",
1829 sdata
->name
, bssid
);
1832 mutex_unlock(&sdata
->local
->sta_mtx
);
1834 return RX_MGMT_CFG80211_RX_AUTH
;
1836 mutex_unlock(&sdata
->local
->sta_mtx
);
1837 /* ignore frame -- wait for timeout */
1838 return RX_MGMT_NONE
;
1842 static enum rx_mgmt_action __must_check
1843 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1844 struct ieee80211_mgmt
*mgmt
, size_t len
)
1846 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1847 const u8
*bssid
= NULL
;
1850 lockdep_assert_held(&ifmgd
->mtx
);
1853 return RX_MGMT_NONE
;
1855 if (!ifmgd
->associated
||
1856 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1857 return RX_MGMT_NONE
;
1859 bssid
= ifmgd
->associated
->bssid
;
1861 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1863 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1864 sdata
->name
, bssid
, reason_code
);
1866 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1868 mutex_lock(&sdata
->local
->mtx
);
1869 ieee80211_recalc_idle(sdata
->local
);
1870 mutex_unlock(&sdata
->local
->mtx
);
1872 return RX_MGMT_CFG80211_DEAUTH
;
1876 static enum rx_mgmt_action __must_check
1877 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1878 struct ieee80211_mgmt
*mgmt
, size_t len
)
1880 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1883 lockdep_assert_held(&ifmgd
->mtx
);
1886 return RX_MGMT_NONE
;
1888 if (!ifmgd
->associated
||
1889 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1890 return RX_MGMT_NONE
;
1892 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1894 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1895 sdata
->name
, mgmt
->sa
, reason_code
);
1897 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1899 mutex_lock(&sdata
->local
->mtx
);
1900 ieee80211_recalc_idle(sdata
->local
);
1901 mutex_unlock(&sdata
->local
->mtx
);
1903 return RX_MGMT_CFG80211_DISASSOC
;
1906 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1907 u8
*supp_rates
, unsigned int supp_rates_len
,
1908 u32
*rates
, u32
*basic_rates
,
1909 bool *have_higher_than_11mbit
,
1910 int *min_rate
, int *min_rate_index
)
1914 for (i
= 0; i
< supp_rates_len
; i
++) {
1915 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1916 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1919 *have_higher_than_11mbit
= true;
1922 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1923 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1925 * Note: Even through the membership selector and the basic
1926 * rate flag share the same bit, they are not exactly
1929 if (!!(supp_rates
[i
] & 0x80) &&
1930 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1933 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1934 if (sband
->bitrates
[j
].bitrate
== rate
) {
1937 *basic_rates
|= BIT(j
);
1938 if (rate
< *min_rate
) {
1940 *min_rate_index
= j
;
1948 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1951 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1953 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1956 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1958 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1959 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1963 sdata
->u
.mgd
.assoc_data
= NULL
;
1966 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1967 struct cfg80211_bss
*cbss
,
1968 struct ieee80211_mgmt
*mgmt
, size_t len
)
1970 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1971 struct ieee80211_local
*local
= sdata
->local
;
1972 struct ieee80211_supported_band
*sband
;
1973 struct sta_info
*sta
;
1975 u16 capab_info
, aid
;
1976 struct ieee802_11_elems elems
;
1977 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1981 /* AssocResp and ReassocResp have identical structure */
1983 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1984 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1986 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1988 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1990 aid
&= ~(BIT(15) | BIT(14));
1992 ifmgd
->broken_ap
= false;
1994 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1996 "%s: invalid AID value %d (out of range), turn off PS\n",
1999 ifmgd
->broken_ap
= true;
2002 pos
= mgmt
->u
.assoc_resp
.variable
;
2003 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2005 if (!elems
.supp_rates
) {
2006 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
2013 mutex_lock(&sdata
->local
->sta_mtx
);
2015 * station info was already allocated and inserted before
2016 * the association and should be available to us
2018 sta
= sta_info_get(sdata
, cbss
->bssid
);
2019 if (WARN_ON(!sta
)) {
2020 mutex_unlock(&sdata
->local
->sta_mtx
);
2024 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2026 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2027 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2028 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2030 sta
->supports_40mhz
=
2031 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2033 rate_control_rate_init(sta
);
2035 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2036 set_sta_flag(sta
, WLAN_STA_MFP
);
2038 if (elems
.wmm_param
)
2039 set_sta_flag(sta
, WLAN_STA_WME
);
2041 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2043 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2044 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2045 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2048 "%s: failed to move station %pM to desired state\n",
2049 sdata
->name
, sta
->sta
.addr
);
2050 WARN_ON(__sta_info_destroy(sta
));
2051 mutex_unlock(&sdata
->local
->sta_mtx
);
2055 mutex_unlock(&sdata
->local
->sta_mtx
);
2058 * Always handle WMM once after association regardless
2059 * of the first value the AP uses. Setting -1 here has
2060 * that effect because the AP values is an unsigned
2063 ifmgd
->wmm_last_param_set
= -1;
2065 if (elems
.wmm_param
)
2066 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2067 elems
.wmm_param_len
);
2069 ieee80211_set_wmm_default(sdata
, false);
2070 changed
|= BSS_CHANGED_QOS
;
2072 if (elems
.ht_operation
&& elems
.wmm_param
&&
2073 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2074 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2075 cbss
->bssid
, false);
2077 /* set AID and assoc capability,
2078 * ieee80211_set_associated() will tell the driver */
2079 bss_conf
->aid
= aid
;
2080 bss_conf
->assoc_capability
= capab_info
;
2081 ieee80211_set_associated(sdata
, cbss
, changed
);
2084 * If we're using 4-addr mode, let the AP know that we're
2085 * doing so, so that it can create the STA VLAN on its side
2087 if (ifmgd
->use_4addr
)
2088 ieee80211_send_4addr_nullfunc(local
, sdata
);
2091 * Start timer to probe the connection to the AP now.
2092 * Also start the timer that will detect beacon loss.
2094 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2095 ieee80211_sta_reset_beacon_monitor(sdata
);
2100 static enum rx_mgmt_action __must_check
2101 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2102 struct ieee80211_mgmt
*mgmt
, size_t len
,
2103 struct cfg80211_bss
**bss
)
2105 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2106 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2107 u16 capab_info
, status_code
, aid
;
2108 struct ieee802_11_elems elems
;
2112 lockdep_assert_held(&ifmgd
->mtx
);
2115 return RX_MGMT_NONE
;
2116 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2117 return RX_MGMT_NONE
;
2120 * AssocResp and ReassocResp have identical structure, so process both
2121 * of them in this function.
2125 return RX_MGMT_NONE
;
2127 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2128 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2129 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2130 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2132 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
2133 "status=%d aid=%d)\n",
2134 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2135 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2137 pos
= mgmt
->u
.assoc_resp
.variable
;
2138 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2140 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2141 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2142 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2144 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2145 ms
= tu
* 1024 / 1000;
2146 printk(KERN_DEBUG
"%s: %pM rejected association temporarily; "
2147 "comeback duration %u TU (%u ms)\n",
2148 sdata
->name
, mgmt
->sa
, tu
, ms
);
2149 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2150 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2151 run_again(ifmgd
, assoc_data
->timeout
);
2152 return RX_MGMT_NONE
;
2155 *bss
= assoc_data
->bss
;
2157 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2158 printk(KERN_DEBUG
"%s: %pM denied association (code=%d)\n",
2159 sdata
->name
, mgmt
->sa
, status_code
);
2160 ieee80211_destroy_assoc_data(sdata
, false);
2162 printk(KERN_DEBUG
"%s: associated\n", sdata
->name
);
2164 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2165 /* oops -- internal error -- send timeout for now */
2166 ieee80211_destroy_assoc_data(sdata
, true);
2167 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2168 cfg80211_put_bss(*bss
);
2169 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2173 * destroy assoc_data afterwards, as otherwise an idle
2174 * recalc after assoc_data is NULL but before associated
2175 * is set can cause the interface to go idle
2177 ieee80211_destroy_assoc_data(sdata
, true);
2180 return RX_MGMT_CFG80211_RX_ASSOC
;
2182 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2183 struct ieee80211_mgmt
*mgmt
,
2185 struct ieee80211_rx_status
*rx_status
,
2186 struct ieee802_11_elems
*elems
,
2189 struct ieee80211_local
*local
= sdata
->local
;
2191 struct ieee80211_bss
*bss
;
2192 struct ieee80211_channel
*channel
;
2193 bool need_ps
= false;
2195 if (sdata
->u
.mgd
.associated
&&
2196 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2197 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2198 /* not previously set so we may need to recalc */
2199 need_ps
= !bss
->dtim_period
;
2202 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2203 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2206 freq
= rx_status
->freq
;
2208 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2210 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2213 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2216 ieee80211_rx_bss_put(local
, bss
);
2218 if (!sdata
->u
.mgd
.associated
)
2222 mutex_lock(&local
->iflist_mtx
);
2223 ieee80211_recalc_ps(local
, -1);
2224 mutex_unlock(&local
->iflist_mtx
);
2227 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2228 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2230 struct ieee80211_channel_sw_ie
*sw_elem
=
2231 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2232 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2233 bss
, rx_status
->mactime
);
2238 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2239 struct sk_buff
*skb
)
2241 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2242 struct ieee80211_if_managed
*ifmgd
;
2243 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2244 size_t baselen
, len
= skb
->len
;
2245 struct ieee802_11_elems elems
;
2247 ifmgd
= &sdata
->u
.mgd
;
2249 ASSERT_MGD_MTX(ifmgd
);
2251 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2252 return; /* ignore ProbeResp to foreign address */
2254 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2258 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2261 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2263 if (ifmgd
->associated
&&
2264 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2265 ieee80211_reset_ap_probe(sdata
);
2267 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2268 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2269 /* got probe response, continue with auth */
2270 printk(KERN_DEBUG
"%s: direct probe responded\n", sdata
->name
);
2271 ifmgd
->auth_data
->tries
= 0;
2272 ifmgd
->auth_data
->timeout
= jiffies
;
2273 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2278 * This is the canonical list of information elements we care about,
2279 * the filter code also gives us all changes to the Microsoft OUI
2280 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2282 * We implement beacon filtering in software since that means we can
2283 * avoid processing the frame here and in cfg80211, and userspace
2284 * will not be able to tell whether the hardware supports it or not.
2286 * XXX: This list needs to be dynamic -- userspace needs to be able to
2287 * add items it requires. It also needs to be able to tell us to
2288 * look out for other vendor IEs.
2290 static const u64 care_about_ies
=
2291 (1ULL << WLAN_EID_COUNTRY
) |
2292 (1ULL << WLAN_EID_ERP_INFO
) |
2293 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2294 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2295 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2296 (1ULL << WLAN_EID_HT_OPERATION
);
2298 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2299 struct ieee80211_mgmt
*mgmt
,
2301 struct ieee80211_rx_status
*rx_status
)
2303 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2304 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2306 struct ieee802_11_elems elems
;
2307 struct ieee80211_local
*local
= sdata
->local
;
2309 bool erp_valid
, directed_tim
= false;
2314 lockdep_assert_held(&ifmgd
->mtx
);
2316 /* Process beacon from the current BSS */
2317 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2321 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2324 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2325 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2326 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2327 len
- baselen
, &elems
);
2329 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2331 ifmgd
->assoc_data
->have_beacon
= true;
2332 ifmgd
->assoc_data
->sent_assoc
= false;
2333 /* continue assoc process */
2334 ifmgd
->assoc_data
->timeout
= jiffies
;
2335 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2339 if (!ifmgd
->associated
||
2340 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2342 bssid
= ifmgd
->associated
->bssid
;
2344 /* Track average RSSI from the Beacon frames of the current AP */
2345 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2346 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2347 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2348 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2349 ifmgd
->last_cqm_event_signal
= 0;
2350 ifmgd
->count_beacon_signal
= 1;
2351 ifmgd
->last_ave_beacon_signal
= 0;
2353 ifmgd
->ave_beacon_signal
=
2354 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2355 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2356 ifmgd
->ave_beacon_signal
) / 16;
2357 ifmgd
->count_beacon_signal
++;
2360 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2361 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2362 int sig
= ifmgd
->ave_beacon_signal
;
2363 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2366 * if signal crosses either of the boundaries, invoke callback
2367 * with appropriate parameters
2369 if (sig
> ifmgd
->rssi_max_thold
&&
2370 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2371 ifmgd
->last_ave_beacon_signal
= sig
;
2372 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2373 } else if (sig
< ifmgd
->rssi_min_thold
&&
2374 (last_sig
>= ifmgd
->rssi_max_thold
||
2376 ifmgd
->last_ave_beacon_signal
= sig
;
2377 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2381 if (bss_conf
->cqm_rssi_thold
&&
2382 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2383 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2384 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2385 int last_event
= ifmgd
->last_cqm_event_signal
;
2386 int thold
= bss_conf
->cqm_rssi_thold
;
2387 int hyst
= bss_conf
->cqm_rssi_hyst
;
2389 (last_event
== 0 || sig
< last_event
- hyst
)) {
2390 ifmgd
->last_cqm_event_signal
= sig
;
2391 ieee80211_cqm_rssi_notify(
2393 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2395 } else if (sig
> thold
&&
2396 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2397 ifmgd
->last_cqm_event_signal
= sig
;
2398 ieee80211_cqm_rssi_notify(
2400 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2405 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2406 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2407 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2410 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2411 mutex_lock(&local
->iflist_mtx
);
2412 ieee80211_recalc_ps(local
, -1);
2413 mutex_unlock(&local
->iflist_mtx
);
2417 * Push the beacon loss detection into the future since
2418 * we are processing a beacon from the AP just now.
2420 ieee80211_sta_reset_beacon_monitor(sdata
);
2422 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2423 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2424 len
- baselen
, &elems
,
2425 care_about_ies
, ncrc
);
2427 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2428 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2431 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2432 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2435 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2436 elems
.wmm_param_len
);
2439 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2441 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2442 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2443 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2444 ieee80211_hw_config(local
,
2445 IEEE80211_CONF_CHANGE_PS
);
2447 ieee80211_send_nullfunc(local
, sdata
, 0);
2448 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2449 local
->pspolling
= true;
2452 * Here is assumed that the driver will be
2453 * able to send ps-poll frame and receive a
2454 * response even though power save mode is
2455 * enabled, but some drivers might require
2456 * to disable power save here. This needs
2457 * to be investigated.
2459 ieee80211_send_pspoll(local
, sdata
);
2464 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2466 ifmgd
->beacon_crc
= ncrc
;
2467 ifmgd
->beacon_crc_valid
= true;
2469 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2471 erp_value
= elems
.erp_info
[0];
2475 changed
|= ieee80211_handle_bss_capability(sdata
,
2476 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2477 erp_valid
, erp_value
);
2480 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2481 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2482 struct ieee80211_supported_band
*sband
;
2484 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2486 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2490 /* Note: country IE parsing is done for us by cfg80211 */
2491 if (elems
.country_elem
) {
2492 /* TODO: IBSS also needs this */
2493 if (elems
.pwr_constr_elem
)
2494 ieee80211_handle_pwr_constr(sdata
,
2495 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2496 elems
.pwr_constr_elem
,
2497 elems
.pwr_constr_elem_len
);
2500 ieee80211_bss_info_change_notify(sdata
, changed
);
2503 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2504 struct sk_buff
*skb
)
2506 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2507 struct ieee80211_rx_status
*rx_status
;
2508 struct ieee80211_mgmt
*mgmt
;
2509 struct cfg80211_bss
*bss
= NULL
;
2510 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2513 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2514 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2515 fc
= le16_to_cpu(mgmt
->frame_control
);
2517 mutex_lock(&ifmgd
->mtx
);
2519 switch (fc
& IEEE80211_FCTL_STYPE
) {
2520 case IEEE80211_STYPE_BEACON
:
2521 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2523 case IEEE80211_STYPE_PROBE_RESP
:
2524 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2526 case IEEE80211_STYPE_AUTH
:
2527 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2529 case IEEE80211_STYPE_DEAUTH
:
2530 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2532 case IEEE80211_STYPE_DISASSOC
:
2533 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2535 case IEEE80211_STYPE_ASSOC_RESP
:
2536 case IEEE80211_STYPE_REASSOC_RESP
:
2537 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2539 case IEEE80211_STYPE_ACTION
:
2540 switch (mgmt
->u
.action
.category
) {
2541 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2542 ieee80211_sta_process_chanswitch(sdata
,
2543 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2544 (void *)ifmgd
->associated
->priv
,
2545 rx_status
->mactime
);
2549 mutex_unlock(&ifmgd
->mtx
);
2555 case RX_MGMT_CFG80211_DEAUTH
:
2556 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2558 case RX_MGMT_CFG80211_DISASSOC
:
2559 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2561 case RX_MGMT_CFG80211_RX_AUTH
:
2562 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2564 case RX_MGMT_CFG80211_RX_ASSOC
:
2565 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2567 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2568 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2571 WARN(1, "unexpected: %d", rma
);
2575 static void ieee80211_sta_timer(unsigned long data
)
2577 struct ieee80211_sub_if_data
*sdata
=
2578 (struct ieee80211_sub_if_data
*) data
;
2579 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2580 struct ieee80211_local
*local
= sdata
->local
;
2582 if (local
->quiescing
) {
2583 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2587 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2590 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2591 u8
*bssid
, u8 reason
)
2593 struct ieee80211_local
*local
= sdata
->local
;
2594 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2595 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2597 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2598 IEEE80211_STA_BEACON_POLL
);
2600 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2602 mutex_unlock(&ifmgd
->mtx
);
2605 * must be outside lock due to cfg80211,
2606 * but that's not a problem.
2608 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2610 mutex_lock(&local
->mtx
);
2611 ieee80211_recalc_idle(local
);
2612 mutex_unlock(&local
->mtx
);
2614 mutex_lock(&ifmgd
->mtx
);
2617 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2619 struct ieee80211_local
*local
= sdata
->local
;
2620 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2621 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2623 lockdep_assert_held(&ifmgd
->mtx
);
2625 if (WARN_ON_ONCE(!auth_data
))
2630 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2631 printk(KERN_DEBUG
"%s: authentication with %pM timed out\n",
2632 sdata
->name
, auth_data
->bss
->bssid
);
2635 * Most likely AP is not in the range so remove the
2636 * bss struct for that AP.
2638 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2643 if (auth_data
->bss
->proberesp_ies
) {
2644 printk(KERN_DEBUG
"%s: send auth to %pM (try %d/%d)\n",
2645 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2646 IEEE80211_AUTH_MAX_TRIES
);
2648 auth_data
->expected_transaction
= 2;
2649 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2650 auth_data
->ie
, auth_data
->ie_len
,
2651 auth_data
->bss
->bssid
,
2652 auth_data
->bss
->bssid
, NULL
, 0, 0);
2656 printk(KERN_DEBUG
"%s: direct probe to %pM (try %d/%i)\n",
2657 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2658 IEEE80211_AUTH_MAX_TRIES
);
2660 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2664 * Direct probe is sent to broadcast address as some APs
2665 * will not answer to direct packet in unassociated state.
2667 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2668 NULL
, 0, (u32
) -1, true, false);
2671 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2672 run_again(ifmgd
, auth_data
->timeout
);
2677 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2679 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2680 struct ieee80211_local
*local
= sdata
->local
;
2682 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2684 assoc_data
->tries
++;
2685 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2686 printk(KERN_DEBUG
"%s: association with %pM timed out\n",
2687 sdata
->name
, assoc_data
->bss
->bssid
);
2690 * Most likely AP is not in the range so remove the
2691 * bss struct for that AP.
2693 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2698 printk(KERN_DEBUG
"%s: associate with %pM (try %d/%d)\n",
2699 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2700 IEEE80211_ASSOC_MAX_TRIES
);
2701 ieee80211_send_assoc(sdata
);
2703 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2704 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2709 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2711 struct ieee80211_local
*local
= sdata
->local
;
2712 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2714 mutex_lock(&ifmgd
->mtx
);
2716 if (ifmgd
->auth_data
&&
2717 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2718 if (ifmgd
->auth_data
->done
) {
2720 * ok ... we waited for assoc but userspace didn't,
2721 * so let's just kill the auth data
2723 ieee80211_destroy_auth_data(sdata
, false);
2724 } else if (ieee80211_probe_auth(sdata
)) {
2727 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2729 ieee80211_destroy_auth_data(sdata
, false);
2731 mutex_unlock(&ifmgd
->mtx
);
2732 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2733 mutex_lock(&ifmgd
->mtx
);
2735 } else if (ifmgd
->auth_data
)
2736 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2738 if (ifmgd
->assoc_data
&&
2739 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2740 if (!ifmgd
->assoc_data
->have_beacon
||
2741 ieee80211_do_assoc(sdata
)) {
2744 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2746 ieee80211_destroy_assoc_data(sdata
, false);
2748 mutex_unlock(&ifmgd
->mtx
);
2749 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2750 mutex_lock(&ifmgd
->mtx
);
2752 } else if (ifmgd
->assoc_data
)
2753 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2755 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2756 IEEE80211_STA_CONNECTION_POLL
) &&
2757 ifmgd
->associated
) {
2761 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2763 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2764 max_tries
= max_nullfunc_tries
;
2766 max_tries
= max_probe_tries
;
2768 /* ACK received for nullfunc probing frame */
2769 if (!ifmgd
->probe_send_count
)
2770 ieee80211_reset_ap_probe(sdata
);
2771 else if (ifmgd
->nullfunc_failed
) {
2772 if (ifmgd
->probe_send_count
< max_tries
) {
2773 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2774 wiphy_debug(local
->hw
.wiphy
,
2775 "%s: No ack for nullfunc frame to"
2776 " AP %pM, try %d/%i\n",
2778 ifmgd
->probe_send_count
, max_tries
);
2780 ieee80211_mgd_probe_ap_send(sdata
);
2782 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2783 wiphy_debug(local
->hw
.wiphy
,
2784 "%s: No ack for nullfunc frame to"
2785 " AP %pM, disconnecting.\n",
2786 sdata
->name
, bssid
);
2788 ieee80211_sta_connection_lost(sdata
, bssid
,
2789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2791 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2792 run_again(ifmgd
, ifmgd
->probe_timeout
);
2793 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2794 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2795 wiphy_debug(local
->hw
.wiphy
,
2796 "%s: Failed to send nullfunc to AP %pM"
2797 " after %dms, disconnecting.\n",
2799 bssid
, probe_wait_ms
);
2801 ieee80211_sta_connection_lost(sdata
, bssid
,
2802 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2803 } else if (ifmgd
->probe_send_count
< max_tries
) {
2804 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2805 wiphy_debug(local
->hw
.wiphy
,
2806 "%s: No probe response from AP %pM"
2807 " after %dms, try %d/%i\n",
2809 bssid
, probe_wait_ms
,
2810 ifmgd
->probe_send_count
, max_tries
);
2812 ieee80211_mgd_probe_ap_send(sdata
);
2815 * We actually lost the connection ... or did we?
2818 wiphy_debug(local
->hw
.wiphy
,
2819 "%s: No probe response from AP %pM"
2820 " after %dms, disconnecting.\n",
2822 bssid
, probe_wait_ms
);
2824 ieee80211_sta_connection_lost(sdata
, bssid
,
2825 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2829 mutex_unlock(&ifmgd
->mtx
);
2831 mutex_lock(&local
->mtx
);
2832 ieee80211_recalc_idle(local
);
2833 mutex_unlock(&local
->mtx
);
2836 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2838 struct ieee80211_sub_if_data
*sdata
=
2839 (struct ieee80211_sub_if_data
*) data
;
2840 struct ieee80211_local
*local
= sdata
->local
;
2842 if (local
->quiescing
)
2845 ieee80211_queue_work(&sdata
->local
->hw
,
2846 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2849 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2851 struct ieee80211_sub_if_data
*sdata
=
2852 (struct ieee80211_sub_if_data
*) data
;
2853 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2854 struct ieee80211_local
*local
= sdata
->local
;
2856 if (local
->quiescing
)
2859 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2862 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2864 struct ieee80211_sub_if_data
*sdata
=
2865 container_of(work
, struct ieee80211_sub_if_data
,
2866 u
.mgd
.monitor_work
);
2868 ieee80211_mgd_probe_ap(sdata
, false);
2871 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2875 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2876 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2877 IEEE80211_STA_CONNECTION_POLL
);
2879 /* let's probe the connection once */
2880 flags
= sdata
->local
->hw
.flags
;
2881 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2882 ieee80211_queue_work(&sdata
->local
->hw
,
2883 &sdata
->u
.mgd
.monitor_work
);
2884 /* and do all the other regular work too */
2885 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2890 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2892 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2895 * we need to use atomic bitops for the running bits
2896 * only because both timers might fire at the same
2897 * time -- the code here is properly synchronised.
2900 cancel_work_sync(&ifmgd
->request_smps_work
);
2902 cancel_work_sync(&ifmgd
->monitor_work
);
2903 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2904 if (del_timer_sync(&ifmgd
->timer
))
2905 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2907 cancel_work_sync(&ifmgd
->chswitch_work
);
2908 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2909 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2911 /* these will just be re-established on connection */
2912 del_timer_sync(&ifmgd
->conn_mon_timer
);
2913 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2916 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2918 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2920 if (!ifmgd
->associated
)
2923 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2924 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2925 mutex_lock(&ifmgd
->mtx
);
2926 if (ifmgd
->associated
) {
2927 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2928 wiphy_debug(sdata
->local
->hw
.wiphy
,
2929 "%s: driver requested disconnect after resume.\n",
2932 ieee80211_sta_connection_lost(sdata
,
2933 ifmgd
->associated
->bssid
,
2934 WLAN_REASON_UNSPECIFIED
);
2935 mutex_unlock(&ifmgd
->mtx
);
2938 mutex_unlock(&ifmgd
->mtx
);
2941 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2942 add_timer(&ifmgd
->timer
);
2943 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2944 add_timer(&ifmgd
->chswitch_timer
);
2945 ieee80211_sta_reset_beacon_monitor(sdata
);
2946 ieee80211_restart_sta_timer(sdata
);
2950 /* interface setup */
2951 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2953 struct ieee80211_if_managed
*ifmgd
;
2955 ifmgd
= &sdata
->u
.mgd
;
2956 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2957 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2958 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2959 ieee80211_beacon_connection_loss_work
);
2960 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2961 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2962 (unsigned long) sdata
);
2963 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2964 (unsigned long) sdata
);
2965 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2966 (unsigned long) sdata
);
2967 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2968 (unsigned long) sdata
);
2971 ifmgd
->powersave
= sdata
->wdev
.ps
;
2972 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2973 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2975 mutex_init(&ifmgd
->mtx
);
2977 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2978 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2980 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2983 /* scan finished notification */
2984 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2986 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2988 /* Restart STA timers */
2990 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2991 ieee80211_restart_sta_timer(sdata
);
2995 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2996 unsigned long data
, void *dummy
)
2998 s32 latency_usec
= (s32
) data
;
2999 struct ieee80211_local
*local
=
3000 container_of(nb
, struct ieee80211_local
,
3001 network_latency_notifier
);
3003 mutex_lock(&local
->iflist_mtx
);
3004 ieee80211_recalc_ps(local
, latency_usec
);
3005 mutex_unlock(&local
->iflist_mtx
);
3010 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3011 struct cfg80211_bss
*cbss
, bool assoc
)
3013 struct ieee80211_local
*local
= sdata
->local
;
3014 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3015 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3016 struct sta_info
*sta
;
3017 bool have_sta
= false;
3020 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3021 const u8
*ht_oper_ie
;
3022 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3023 struct ieee80211_supported_band
*sband
;
3025 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3030 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3035 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3040 mutex_lock(&local
->mtx
);
3041 ieee80211_recalc_idle(sdata
->local
);
3042 mutex_unlock(&local
->mtx
);
3044 /* switch to the right channel */
3045 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3047 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3049 if (sband
->ht_cap
.ht_supported
) {
3050 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3051 cbss
->information_elements
,
3052 cbss
->len_information_elements
);
3053 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3054 ht_oper
= (void *)(ht_oper_ie
+ 2);
3058 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3059 cbss
->channel
->band
);
3060 /* check that channel matches the right operating channel */
3061 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3063 * It's possible that some APs are confused here;
3064 * Netgear WNDR3700 sometimes reports 4 higher than
3065 * the actual channel in association responses, but
3066 * since we look at probe response/beacon data here
3070 "%s: Wrong control channel: center-freq: %d"
3071 " ht-cfreq: %d ht->primary_chan: %d"
3072 " band: %d. Disabling HT.\n",
3073 sdata
->name
, cbss
->channel
->center_freq
,
3074 ht_cfreq
, ht_oper
->primary_chan
,
3075 cbss
->channel
->band
);
3081 channel_type
= NL80211_CHAN_HT20
;
3083 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3084 switch (ht_oper
->ht_param
&
3085 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3086 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3087 channel_type
= NL80211_CHAN_HT40PLUS
;
3089 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3090 channel_type
= NL80211_CHAN_HT40MINUS
;
3096 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3097 /* can only fail due to HT40+/- mismatch */
3098 channel_type
= NL80211_CHAN_HT20
;
3100 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3102 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3103 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3107 local
->oper_channel
= cbss
->channel
;
3108 ieee80211_hw_config(local
, 0);
3111 u32 rates
= 0, basic_rates
= 0;
3112 bool have_higher_than_11mbit
;
3113 int min_rate
= INT_MAX
, min_rate_index
= -1;
3115 ieee80211_get_rates(sband
, bss
->supp_rates
,
3116 bss
->supp_rates_len
,
3117 &rates
, &basic_rates
,
3118 &have_higher_than_11mbit
,
3119 &min_rate
, &min_rate_index
);
3122 * This used to be a workaround for basic rates missing
3123 * in the association response frame. Now that we no
3124 * longer use the basic rates from there, it probably
3125 * doesn't happen any more, but keep the workaround so
3126 * in case some *other* APs are buggy in different ways
3127 * we can connect -- with a warning.
3129 if (!basic_rates
&& min_rate_index
>= 0) {
3131 "%s: No basic rates, using min rate instead.\n",
3133 basic_rates
= BIT(min_rate_index
);
3136 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3137 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3139 /* cf. IEEE 802.11 9.2.12 */
3140 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3141 have_higher_than_11mbit
)
3142 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3144 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3146 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3148 /* tell driver about BSSID and basic rates */
3149 ieee80211_bss_info_change_notify(sdata
,
3150 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3153 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3155 err
= sta_info_insert(sta
);
3159 "%s: failed to insert STA entry for the AP (error %d)\n",
3164 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3170 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3171 struct cfg80211_auth_request
*req
)
3173 struct ieee80211_local
*local
= sdata
->local
;
3174 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3175 struct ieee80211_mgd_auth_data
*auth_data
;
3179 /* prepare auth data structure */
3181 switch (req
->auth_type
) {
3182 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3183 auth_alg
= WLAN_AUTH_OPEN
;
3185 case NL80211_AUTHTYPE_SHARED_KEY
:
3186 if (IS_ERR(local
->wep_tx_tfm
))
3188 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3190 case NL80211_AUTHTYPE_FT
:
3191 auth_alg
= WLAN_AUTH_FT
;
3193 case NL80211_AUTHTYPE_NETWORK_EAP
:
3194 auth_alg
= WLAN_AUTH_LEAP
;
3200 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3204 auth_data
->bss
= req
->bss
;
3206 if (req
->ie
&& req
->ie_len
) {
3207 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3208 auth_data
->ie_len
= req
->ie_len
;
3211 if (req
->key
&& req
->key_len
) {
3212 auth_data
->key_len
= req
->key_len
;
3213 auth_data
->key_idx
= req
->key_idx
;
3214 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3217 auth_data
->algorithm
= auth_alg
;
3219 /* try to authenticate/probe */
3221 mutex_lock(&ifmgd
->mtx
);
3223 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3224 ifmgd
->assoc_data
) {
3229 if (ifmgd
->auth_data
)
3230 ieee80211_destroy_auth_data(sdata
, false);
3232 /* prep auth_data so we don't go into idle on disassoc */
3233 ifmgd
->auth_data
= auth_data
;
3235 if (ifmgd
->associated
)
3236 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3238 printk(KERN_DEBUG
"%s: authenticate with %pM\n",
3239 sdata
->name
, req
->bss
->bssid
);
3241 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3245 err
= ieee80211_probe_auth(sdata
);
3247 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3251 /* hold our own reference */
3252 cfg80211_ref_bss(auth_data
->bss
);
3257 ifmgd
->auth_data
= NULL
;
3261 mutex_unlock(&ifmgd
->mtx
);
3266 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3267 struct cfg80211_assoc_request
*req
)
3269 struct ieee80211_local
*local
= sdata
->local
;
3270 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3271 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3272 struct ieee80211_mgd_assoc_data
*assoc_data
;
3273 struct ieee80211_supported_band
*sband
;
3277 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3281 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3285 mutex_lock(&ifmgd
->mtx
);
3287 if (ifmgd
->associated
)
3288 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3290 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3295 if (ifmgd
->assoc_data
) {
3300 if (ifmgd
->auth_data
) {
3303 /* keep sta info, bssid if matching */
3304 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3305 ieee80211_destroy_auth_data(sdata
, match
);
3308 /* prepare assoc data */
3310 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3311 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3313 ifmgd
->beacon_crc_valid
= false;
3316 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3317 * We still associate in non-HT mode (11a/b/g) if any one of these
3318 * ciphers is configured as pairwise.
3319 * We can set this to true for non-11n hardware, that'll be checked
3320 * separately along with the peer capabilities.
3322 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
3323 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3324 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3325 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
3326 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3328 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3329 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3331 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3332 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3333 if (!sband
->ht_cap
.ht_supported
||
3334 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
)
3335 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3337 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3338 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3339 sizeof(ifmgd
->ht_capa_mask
));
3341 if (req
->ie
&& req
->ie_len
) {
3342 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3343 assoc_data
->ie_len
= req
->ie_len
;
3346 assoc_data
->bss
= req
->bss
;
3348 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3349 if (ifmgd
->powersave
)
3350 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3352 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3354 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3356 assoc_data
->capability
= req
->bss
->capability
;
3357 assoc_data
->wmm
= bss
->wmm_used
&&
3358 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3359 assoc_data
->supp_rates
= bss
->supp_rates
;
3360 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3361 assoc_data
->ht_operation_ie
=
3362 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3364 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3365 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3366 assoc_data
->uapsd
= true;
3367 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3369 assoc_data
->uapsd
= false;
3370 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3373 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3374 assoc_data
->ssid_len
= ssidie
[1];
3376 if (req
->prev_bssid
)
3377 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3380 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3381 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3383 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3384 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3387 if (req
->crypto
.control_port
)
3388 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3390 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3392 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3393 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3395 /* kick off associate process */
3397 ifmgd
->assoc_data
= assoc_data
;
3399 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3403 if (!bss
->dtim_period
&&
3404 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3406 * Wait up to one beacon interval ...
3407 * should this be more if we miss one?
3409 printk(KERN_DEBUG
"%s: waiting for beacon from %pM\n",
3410 sdata
->name
, ifmgd
->bssid
);
3411 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3413 assoc_data
->have_beacon
= true;
3414 assoc_data
->sent_assoc
= false;
3415 assoc_data
->timeout
= jiffies
;
3417 run_again(ifmgd
, assoc_data
->timeout
);
3419 if (bss
->corrupt_data
) {
3420 char *corrupt_type
= "data";
3421 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3422 if (bss
->corrupt_data
&
3423 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3424 corrupt_type
= "beacon and probe response";
3426 corrupt_type
= "beacon";
3427 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3428 corrupt_type
= "probe response";
3429 printk(KERN_DEBUG
"%s: associating with AP with corrupt %s\n",
3430 sdata
->name
, corrupt_type
);
3436 ifmgd
->assoc_data
= NULL
;
3440 mutex_unlock(&ifmgd
->mtx
);
3445 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3446 struct cfg80211_deauth_request
*req
)
3448 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3449 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3451 mutex_lock(&ifmgd
->mtx
);
3453 if (ifmgd
->auth_data
) {
3454 ieee80211_destroy_auth_data(sdata
, false);
3455 mutex_unlock(&ifmgd
->mtx
);
3460 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3461 sdata
->name
, req
->bssid
, req
->reason_code
);
3463 if (ifmgd
->associated
&&
3464 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3465 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3466 req
->reason_code
, true, frame_buf
);
3468 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3469 IEEE80211_STYPE_DEAUTH
,
3470 req
->reason_code
, true,
3472 mutex_unlock(&ifmgd
->mtx
);
3474 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3476 mutex_lock(&sdata
->local
->mtx
);
3477 ieee80211_recalc_idle(sdata
->local
);
3478 mutex_unlock(&sdata
->local
->mtx
);
3483 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3484 struct cfg80211_disassoc_request
*req
)
3486 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3488 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3490 mutex_lock(&ifmgd
->mtx
);
3493 * cfg80211 should catch this ... but it's racy since
3494 * we can receive a disassoc frame, process it, hand it
3495 * to cfg80211 while that's in a locked section already
3496 * trying to tell us that the user wants to disconnect.
3498 if (ifmgd
->associated
!= req
->bss
) {
3499 mutex_unlock(&ifmgd
->mtx
);
3503 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
3504 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3506 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3507 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3508 req
->reason_code
, !req
->local_state_change
,
3510 mutex_unlock(&ifmgd
->mtx
);
3512 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3514 mutex_lock(&sdata
->local
->mtx
);
3515 ieee80211_recalc_idle(sdata
->local
);
3516 mutex_unlock(&sdata
->local
->mtx
);
3521 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3523 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3525 mutex_lock(&ifmgd
->mtx
);
3526 if (ifmgd
->assoc_data
)
3527 ieee80211_destroy_assoc_data(sdata
, false);
3528 if (ifmgd
->auth_data
)
3529 ieee80211_destroy_auth_data(sdata
, false);
3530 del_timer_sync(&ifmgd
->timer
);
3531 mutex_unlock(&ifmgd
->mtx
);
3534 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3535 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3538 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3540 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3542 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3544 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
3546 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
3548 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3549 return sdata
->dev
->operstate
;
3551 EXPORT_SYMBOL(ieee80211_get_operstate
);