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_HT_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
< 4)
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
;
1451 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1452 IEEE80211_STA_CONNECTION_POLL
)))
1455 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1456 IEEE80211_STA_BEACON_POLL
);
1457 mutex_lock(&sdata
->local
->iflist_mtx
);
1458 ieee80211_recalc_ps(sdata
->local
, -1);
1459 mutex_unlock(&sdata
->local
->iflist_mtx
);
1461 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1465 * We've received a probe response, but are not sure whether
1466 * we have or will be receiving any beacons or data, so let's
1467 * schedule the timers again, just in case.
1469 ieee80211_sta_reset_beacon_monitor(sdata
);
1471 mod_timer(&ifmgd
->conn_mon_timer
,
1472 round_jiffies_up(jiffies
+
1473 IEEE80211_CONNECTION_IDLE_TIME
));
1476 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1477 struct ieee80211_hdr
*hdr
, bool ack
)
1479 if (!ieee80211_is_data(hdr
->frame_control
))
1483 ieee80211_sta_reset_conn_monitor(sdata
);
1485 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1486 sdata
->u
.mgd
.probe_send_count
> 0) {
1488 sdata
->u
.mgd
.probe_send_count
= 0;
1490 sdata
->u
.mgd
.nullfunc_failed
= true;
1491 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1495 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1497 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1499 u8
*dst
= ifmgd
->associated
->bssid
;
1500 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1503 * Try sending broadcast probe requests for the last three
1504 * probe requests after the first ones failed since some
1505 * buggy APs only support broadcast probe requests.
1507 if (ifmgd
->probe_send_count
>= unicast_limit
)
1511 * When the hardware reports an accurate Tx ACK status, it's
1512 * better to send a nullfunc frame instead of a probe request,
1513 * as it will kick us off the AP quickly if we aren't associated
1514 * anymore. The timeout will be reset if the frame is ACKed by
1517 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1518 ifmgd
->nullfunc_failed
= false;
1519 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1521 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1522 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1523 (u32
) -1, true, false);
1526 ifmgd
->probe_send_count
++;
1527 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1528 run_again(ifmgd
, ifmgd
->probe_timeout
);
1529 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1530 drv_flush(sdata
->local
, false);
1533 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1536 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1537 bool already
= false;
1539 if (!ieee80211_sdata_running(sdata
))
1542 if (sdata
->local
->scanning
)
1545 if (sdata
->local
->tmp_channel
)
1548 mutex_lock(&ifmgd
->mtx
);
1550 if (!ifmgd
->associated
)
1553 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1554 if (beacon
&& net_ratelimit())
1555 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1556 "- sending probe request\n", sdata
->name
);
1560 * The driver/our work has already reported this event or the
1561 * connection monitoring has kicked in and we have already sent
1562 * a probe request. Or maybe the AP died and the driver keeps
1563 * reporting until we disassociate...
1565 * In either case we have to ignore the current call to this
1566 * function (except for setting the correct probe reason bit)
1567 * because otherwise we would reset the timer every time and
1568 * never check whether we received a probe response!
1570 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1571 IEEE80211_STA_CONNECTION_POLL
))
1575 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1577 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1582 mutex_lock(&sdata
->local
->iflist_mtx
);
1583 ieee80211_recalc_ps(sdata
->local
, -1);
1584 mutex_unlock(&sdata
->local
->iflist_mtx
);
1586 ifmgd
->probe_send_count
= 0;
1587 ieee80211_mgd_probe_ap_send(sdata
);
1589 mutex_unlock(&ifmgd
->mtx
);
1592 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1593 struct ieee80211_vif
*vif
)
1595 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1596 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1597 struct sk_buff
*skb
;
1600 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1603 ASSERT_MGD_MTX(ifmgd
);
1605 if (!ifmgd
->associated
)
1608 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1609 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1610 (u32
) -1, ssid
+ 2, ssid
[1],
1615 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1617 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1619 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1620 struct ieee80211_local
*local
= sdata
->local
;
1622 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1624 mutex_lock(&ifmgd
->mtx
);
1625 if (!ifmgd
->associated
) {
1626 mutex_unlock(&ifmgd
->mtx
);
1630 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1632 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1633 sdata
->name
, bssid
);
1635 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1638 mutex_unlock(&ifmgd
->mtx
);
1641 * must be outside lock due to cfg80211,
1642 * but that's not a problem.
1644 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1646 mutex_lock(&local
->mtx
);
1647 ieee80211_recalc_idle(local
);
1648 mutex_unlock(&local
->mtx
);
1651 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1653 struct ieee80211_sub_if_data
*sdata
=
1654 container_of(work
, struct ieee80211_sub_if_data
,
1655 u
.mgd
.beacon_connection_loss_work
);
1656 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1657 struct sta_info
*sta
;
1659 if (ifmgd
->associated
) {
1661 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1663 sta
->beacon_loss_count
++;
1667 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1668 __ieee80211_connection_loss(sdata
);
1670 ieee80211_mgd_probe_ap(sdata
, true);
1673 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1675 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1676 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1678 trace_api_beacon_loss(sdata
);
1680 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1681 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1683 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1685 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1687 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1688 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1690 trace_api_connection_loss(sdata
);
1692 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1693 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1695 EXPORT_SYMBOL(ieee80211_connection_loss
);
1698 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1701 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1703 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1706 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1708 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1709 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1712 cfg80211_put_bss(auth_data
->bss
);
1714 sdata
->u
.mgd
.auth_data
= NULL
;
1717 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1718 struct ieee80211_mgmt
*mgmt
, size_t len
)
1720 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1722 struct ieee802_11_elems elems
;
1724 pos
= mgmt
->u
.auth
.variable
;
1725 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1726 if (!elems
.challenge
)
1728 auth_data
->expected_transaction
= 4;
1729 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1730 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1731 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1732 auth_data
->key
, auth_data
->key_len
,
1733 auth_data
->key_idx
);
1736 static enum rx_mgmt_action __must_check
1737 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1738 struct ieee80211_mgmt
*mgmt
, size_t len
)
1740 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1742 u16 auth_alg
, auth_transaction
, status_code
;
1743 struct sta_info
*sta
;
1745 lockdep_assert_held(&ifmgd
->mtx
);
1748 return RX_MGMT_NONE
;
1750 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1751 return RX_MGMT_NONE
;
1753 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1755 if (compare_ether_addr(bssid
, mgmt
->bssid
))
1756 return RX_MGMT_NONE
;
1758 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1759 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1760 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1762 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1763 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1764 return RX_MGMT_NONE
;
1766 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1767 printk(KERN_DEBUG
"%s: %pM denied authentication (status %d)\n",
1768 sdata
->name
, mgmt
->sa
, status_code
);
1772 switch (ifmgd
->auth_data
->algorithm
) {
1773 case WLAN_AUTH_OPEN
:
1774 case WLAN_AUTH_LEAP
:
1777 case WLAN_AUTH_SHARED_KEY
:
1778 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1779 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1780 /* need another frame */
1781 return RX_MGMT_NONE
;
1785 WARN_ONCE(1, "invalid auth alg %d",
1786 ifmgd
->auth_data
->algorithm
);
1787 return RX_MGMT_NONE
;
1790 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->name
);
1792 ifmgd
->auth_data
->done
= true;
1793 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1794 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1796 /* move station state to auth */
1797 mutex_lock(&sdata
->local
->sta_mtx
);
1798 sta
= sta_info_get(sdata
, bssid
);
1800 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1803 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1804 printk(KERN_DEBUG
"%s: failed moving %pM to auth\n",
1805 sdata
->name
, bssid
);
1808 mutex_unlock(&sdata
->local
->sta_mtx
);
1810 return RX_MGMT_CFG80211_RX_AUTH
;
1812 mutex_unlock(&sdata
->local
->sta_mtx
);
1813 /* ignore frame -- wait for timeout */
1814 return RX_MGMT_NONE
;
1818 static enum rx_mgmt_action __must_check
1819 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1820 struct ieee80211_mgmt
*mgmt
, size_t len
)
1822 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1823 const u8
*bssid
= NULL
;
1826 lockdep_assert_held(&ifmgd
->mtx
);
1829 return RX_MGMT_NONE
;
1831 if (!ifmgd
->associated
||
1832 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1833 return RX_MGMT_NONE
;
1835 bssid
= ifmgd
->associated
->bssid
;
1837 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1839 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1840 sdata
->name
, bssid
, reason_code
);
1842 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1844 mutex_lock(&sdata
->local
->mtx
);
1845 ieee80211_recalc_idle(sdata
->local
);
1846 mutex_unlock(&sdata
->local
->mtx
);
1848 return RX_MGMT_CFG80211_DEAUTH
;
1852 static enum rx_mgmt_action __must_check
1853 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1854 struct ieee80211_mgmt
*mgmt
, size_t len
)
1856 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1859 lockdep_assert_held(&ifmgd
->mtx
);
1862 return RX_MGMT_NONE
;
1864 if (!ifmgd
->associated
||
1865 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1866 return RX_MGMT_NONE
;
1868 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1870 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1871 sdata
->name
, mgmt
->sa
, reason_code
);
1873 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1875 mutex_lock(&sdata
->local
->mtx
);
1876 ieee80211_recalc_idle(sdata
->local
);
1877 mutex_unlock(&sdata
->local
->mtx
);
1879 return RX_MGMT_CFG80211_DISASSOC
;
1882 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1883 u8
*supp_rates
, unsigned int supp_rates_len
,
1884 u32
*rates
, u32
*basic_rates
,
1885 bool *have_higher_than_11mbit
,
1886 int *min_rate
, int *min_rate_index
)
1890 for (i
= 0; i
< supp_rates_len
; i
++) {
1891 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1892 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1895 *have_higher_than_11mbit
= true;
1898 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1899 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1901 * Note: Even through the membership selector and the basic
1902 * rate flag share the same bit, they are not exactly
1905 if (!!(supp_rates
[i
] & 0x80) &&
1906 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1909 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1910 if (sband
->bitrates
[j
].bitrate
== rate
) {
1913 *basic_rates
|= BIT(j
);
1914 if (rate
< *min_rate
) {
1916 *min_rate_index
= j
;
1924 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1927 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1929 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1932 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1934 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1935 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1939 sdata
->u
.mgd
.assoc_data
= NULL
;
1942 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1943 struct cfg80211_bss
*cbss
,
1944 struct ieee80211_mgmt
*mgmt
, size_t len
)
1946 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1947 struct ieee80211_local
*local
= sdata
->local
;
1948 struct ieee80211_supported_band
*sband
;
1949 struct sta_info
*sta
;
1951 u16 capab_info
, aid
;
1952 struct ieee802_11_elems elems
;
1953 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1957 /* AssocResp and ReassocResp have identical structure */
1959 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1960 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1962 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1964 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1966 aid
&= ~(BIT(15) | BIT(14));
1968 ifmgd
->broken_ap
= false;
1970 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1972 "%s: invalid AID value %d (out of range), turn off PS\n",
1975 ifmgd
->broken_ap
= true;
1978 pos
= mgmt
->u
.assoc_resp
.variable
;
1979 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1981 if (!elems
.supp_rates
) {
1982 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1989 mutex_lock(&sdata
->local
->sta_mtx
);
1991 * station info was already allocated and inserted before
1992 * the association and should be available to us
1994 sta
= sta_info_get(sdata
, cbss
->bssid
);
1995 if (WARN_ON(!sta
)) {
1996 mutex_unlock(&sdata
->local
->sta_mtx
);
2000 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2002 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2003 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2004 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2006 sta
->supports_40mhz
=
2007 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2009 rate_control_rate_init(sta
);
2011 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2012 set_sta_flag(sta
, WLAN_STA_MFP
);
2014 if (elems
.wmm_param
)
2015 set_sta_flag(sta
, WLAN_STA_WME
);
2017 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2019 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2020 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2021 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2024 "%s: failed to move station %pM to desired state\n",
2025 sdata
->name
, sta
->sta
.addr
);
2026 WARN_ON(__sta_info_destroy(sta
));
2027 mutex_unlock(&sdata
->local
->sta_mtx
);
2031 mutex_unlock(&sdata
->local
->sta_mtx
);
2034 * Always handle WMM once after association regardless
2035 * of the first value the AP uses. Setting -1 here has
2036 * that effect because the AP values is an unsigned
2039 ifmgd
->wmm_last_param_set
= -1;
2041 if (elems
.wmm_param
)
2042 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2043 elems
.wmm_param_len
);
2045 ieee80211_set_wmm_default(sdata
, false);
2046 changed
|= BSS_CHANGED_QOS
;
2048 if (elems
.ht_operation
&& elems
.wmm_param
&&
2049 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2050 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2051 cbss
->bssid
, false);
2053 /* set AID and assoc capability,
2054 * ieee80211_set_associated() will tell the driver */
2055 bss_conf
->aid
= aid
;
2056 bss_conf
->assoc_capability
= capab_info
;
2057 ieee80211_set_associated(sdata
, cbss
, changed
);
2060 * If we're using 4-addr mode, let the AP know that we're
2061 * doing so, so that it can create the STA VLAN on its side
2063 if (ifmgd
->use_4addr
)
2064 ieee80211_send_4addr_nullfunc(local
, sdata
);
2067 * Start timer to probe the connection to the AP now.
2068 * Also start the timer that will detect beacon loss.
2070 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2071 ieee80211_sta_reset_beacon_monitor(sdata
);
2076 static enum rx_mgmt_action __must_check
2077 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2078 struct ieee80211_mgmt
*mgmt
, size_t len
,
2079 struct cfg80211_bss
**bss
)
2081 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2082 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2083 u16 capab_info
, status_code
, aid
;
2084 struct ieee802_11_elems elems
;
2088 lockdep_assert_held(&ifmgd
->mtx
);
2091 return RX_MGMT_NONE
;
2092 if (compare_ether_addr(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2093 return RX_MGMT_NONE
;
2096 * AssocResp and ReassocResp have identical structure, so process both
2097 * of them in this function.
2101 return RX_MGMT_NONE
;
2103 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2104 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2105 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2106 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2108 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
2109 "status=%d aid=%d)\n",
2110 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2111 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2113 pos
= mgmt
->u
.assoc_resp
.variable
;
2114 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2116 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2117 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2118 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2120 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2121 ms
= tu
* 1024 / 1000;
2122 printk(KERN_DEBUG
"%s: %pM rejected association temporarily; "
2123 "comeback duration %u TU (%u ms)\n",
2124 sdata
->name
, mgmt
->sa
, tu
, ms
);
2125 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2126 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2127 run_again(ifmgd
, assoc_data
->timeout
);
2128 return RX_MGMT_NONE
;
2131 *bss
= assoc_data
->bss
;
2133 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2134 printk(KERN_DEBUG
"%s: %pM denied association (code=%d)\n",
2135 sdata
->name
, mgmt
->sa
, status_code
);
2136 ieee80211_destroy_assoc_data(sdata
, false);
2138 printk(KERN_DEBUG
"%s: associated\n", sdata
->name
);
2140 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2141 /* oops -- internal error -- send timeout for now */
2142 ieee80211_destroy_assoc_data(sdata
, true);
2143 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2144 cfg80211_put_bss(*bss
);
2145 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2149 * destroy assoc_data afterwards, as otherwise an idle
2150 * recalc after assoc_data is NULL but before associated
2151 * is set can cause the interface to go idle
2153 ieee80211_destroy_assoc_data(sdata
, true);
2156 return RX_MGMT_CFG80211_RX_ASSOC
;
2158 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2159 struct ieee80211_mgmt
*mgmt
,
2161 struct ieee80211_rx_status
*rx_status
,
2162 struct ieee802_11_elems
*elems
,
2165 struct ieee80211_local
*local
= sdata
->local
;
2167 struct ieee80211_bss
*bss
;
2168 struct ieee80211_channel
*channel
;
2169 bool need_ps
= false;
2171 if (sdata
->u
.mgd
.associated
&&
2172 compare_ether_addr(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)
2174 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2175 /* not previously set so we may need to recalc */
2176 need_ps
= !bss
->dtim_period
;
2179 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2180 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2183 freq
= rx_status
->freq
;
2185 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2187 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2190 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2193 ieee80211_rx_bss_put(local
, bss
);
2195 if (!sdata
->u
.mgd
.associated
)
2199 mutex_lock(&local
->iflist_mtx
);
2200 ieee80211_recalc_ps(local
, -1);
2201 mutex_unlock(&local
->iflist_mtx
);
2204 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2205 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2207 struct ieee80211_channel_sw_ie
*sw_elem
=
2208 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2209 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2210 bss
, rx_status
->mactime
);
2215 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2216 struct sk_buff
*skb
)
2218 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2219 struct ieee80211_if_managed
*ifmgd
;
2220 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2221 size_t baselen
, len
= skb
->len
;
2222 struct ieee802_11_elems elems
;
2224 ifmgd
= &sdata
->u
.mgd
;
2226 ASSERT_MGD_MTX(ifmgd
);
2228 if (compare_ether_addr(mgmt
->da
, sdata
->vif
.addr
))
2229 return; /* ignore ProbeResp to foreign address */
2231 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2235 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2238 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2240 if (ifmgd
->associated
&&
2241 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
) == 0)
2242 ieee80211_reset_ap_probe(sdata
);
2244 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2245 compare_ether_addr(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)
2247 /* got probe response, continue with auth */
2248 printk(KERN_DEBUG
"%s: direct probe responded\n", sdata
->name
);
2249 ifmgd
->auth_data
->tries
= 0;
2250 ifmgd
->auth_data
->timeout
= jiffies
;
2251 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2256 * This is the canonical list of information elements we care about,
2257 * the filter code also gives us all changes to the Microsoft OUI
2258 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2260 * We implement beacon filtering in software since that means we can
2261 * avoid processing the frame here and in cfg80211, and userspace
2262 * will not be able to tell whether the hardware supports it or not.
2264 * XXX: This list needs to be dynamic -- userspace needs to be able to
2265 * add items it requires. It also needs to be able to tell us to
2266 * look out for other vendor IEs.
2268 static const u64 care_about_ies
=
2269 (1ULL << WLAN_EID_COUNTRY
) |
2270 (1ULL << WLAN_EID_ERP_INFO
) |
2271 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2272 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2273 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2274 (1ULL << WLAN_EID_HT_OPERATION
);
2276 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2277 struct ieee80211_mgmt
*mgmt
,
2279 struct ieee80211_rx_status
*rx_status
)
2281 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2282 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2284 struct ieee802_11_elems elems
;
2285 struct ieee80211_local
*local
= sdata
->local
;
2287 bool erp_valid
, directed_tim
= false;
2292 lockdep_assert_held(&ifmgd
->mtx
);
2294 /* Process beacon from the current BSS */
2295 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2299 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2302 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2303 compare_ether_addr(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)
2305 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2306 len
- baselen
, &elems
);
2308 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2310 ifmgd
->assoc_data
->have_beacon
= true;
2311 ifmgd
->assoc_data
->sent_assoc
= false;
2312 /* continue assoc process */
2313 ifmgd
->assoc_data
->timeout
= jiffies
;
2314 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2318 if (!ifmgd
->associated
||
2319 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2321 bssid
= ifmgd
->associated
->bssid
;
2323 /* Track average RSSI from the Beacon frames of the current AP */
2324 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2325 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2326 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2327 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2328 ifmgd
->last_cqm_event_signal
= 0;
2329 ifmgd
->count_beacon_signal
= 1;
2330 ifmgd
->last_ave_beacon_signal
= 0;
2332 ifmgd
->ave_beacon_signal
=
2333 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2334 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2335 ifmgd
->ave_beacon_signal
) / 16;
2336 ifmgd
->count_beacon_signal
++;
2339 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2340 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2341 int sig
= ifmgd
->ave_beacon_signal
;
2342 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2345 * if signal crosses either of the boundaries, invoke callback
2346 * with appropriate parameters
2348 if (sig
> ifmgd
->rssi_max_thold
&&
2349 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2350 ifmgd
->last_ave_beacon_signal
= sig
;
2351 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2352 } else if (sig
< ifmgd
->rssi_min_thold
&&
2353 (last_sig
>= ifmgd
->rssi_max_thold
||
2355 ifmgd
->last_ave_beacon_signal
= sig
;
2356 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2360 if (bss_conf
->cqm_rssi_thold
&&
2361 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2362 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2363 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2364 int last_event
= ifmgd
->last_cqm_event_signal
;
2365 int thold
= bss_conf
->cqm_rssi_thold
;
2366 int hyst
= bss_conf
->cqm_rssi_hyst
;
2368 (last_event
== 0 || sig
< last_event
- hyst
)) {
2369 ifmgd
->last_cqm_event_signal
= sig
;
2370 ieee80211_cqm_rssi_notify(
2372 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2374 } else if (sig
> thold
&&
2375 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2376 ifmgd
->last_cqm_event_signal
= sig
;
2377 ieee80211_cqm_rssi_notify(
2379 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2384 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2385 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2386 if (net_ratelimit()) {
2387 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
2388 "to a received beacon\n", sdata
->name
);
2391 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2392 mutex_lock(&local
->iflist_mtx
);
2393 ieee80211_recalc_ps(local
, -1);
2394 mutex_unlock(&local
->iflist_mtx
);
2398 * Push the beacon loss detection into the future since
2399 * we are processing a beacon from the AP just now.
2401 ieee80211_sta_reset_beacon_monitor(sdata
);
2403 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2404 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2405 len
- baselen
, &elems
,
2406 care_about_ies
, ncrc
);
2408 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2409 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2412 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2413 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2416 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2417 elems
.wmm_param_len
);
2420 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2422 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2423 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2424 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2425 ieee80211_hw_config(local
,
2426 IEEE80211_CONF_CHANGE_PS
);
2428 ieee80211_send_nullfunc(local
, sdata
, 0);
2429 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2430 local
->pspolling
= true;
2433 * Here is assumed that the driver will be
2434 * able to send ps-poll frame and receive a
2435 * response even though power save mode is
2436 * enabled, but some drivers might require
2437 * to disable power save here. This needs
2438 * to be investigated.
2440 ieee80211_send_pspoll(local
, sdata
);
2445 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2447 ifmgd
->beacon_crc
= ncrc
;
2448 ifmgd
->beacon_crc_valid
= true;
2450 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2452 erp_value
= elems
.erp_info
[0];
2456 changed
|= ieee80211_handle_bss_capability(sdata
,
2457 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2458 erp_valid
, erp_value
);
2461 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2462 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2463 struct ieee80211_supported_band
*sband
;
2465 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2467 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2471 /* Note: country IE parsing is done for us by cfg80211 */
2472 if (elems
.country_elem
) {
2473 /* TODO: IBSS also needs this */
2474 if (elems
.pwr_constr_elem
)
2475 ieee80211_handle_pwr_constr(sdata
,
2476 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2477 elems
.pwr_constr_elem
,
2478 elems
.pwr_constr_elem_len
);
2481 ieee80211_bss_info_change_notify(sdata
, changed
);
2484 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2485 struct sk_buff
*skb
)
2487 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2488 struct ieee80211_rx_status
*rx_status
;
2489 struct ieee80211_mgmt
*mgmt
;
2490 struct cfg80211_bss
*bss
= NULL
;
2491 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2494 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2495 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2496 fc
= le16_to_cpu(mgmt
->frame_control
);
2498 mutex_lock(&ifmgd
->mtx
);
2500 switch (fc
& IEEE80211_FCTL_STYPE
) {
2501 case IEEE80211_STYPE_BEACON
:
2502 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2504 case IEEE80211_STYPE_PROBE_RESP
:
2505 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2507 case IEEE80211_STYPE_AUTH
:
2508 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2510 case IEEE80211_STYPE_DEAUTH
:
2511 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2513 case IEEE80211_STYPE_DISASSOC
:
2514 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2516 case IEEE80211_STYPE_ASSOC_RESP
:
2517 case IEEE80211_STYPE_REASSOC_RESP
:
2518 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2520 case IEEE80211_STYPE_ACTION
:
2521 switch (mgmt
->u
.action
.category
) {
2522 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2523 ieee80211_sta_process_chanswitch(sdata
,
2524 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2525 (void *)ifmgd
->associated
->priv
,
2526 rx_status
->mactime
);
2530 mutex_unlock(&ifmgd
->mtx
);
2536 case RX_MGMT_CFG80211_DEAUTH
:
2537 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2539 case RX_MGMT_CFG80211_DISASSOC
:
2540 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2542 case RX_MGMT_CFG80211_RX_AUTH
:
2543 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2545 case RX_MGMT_CFG80211_RX_ASSOC
:
2546 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2548 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2549 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2552 WARN(1, "unexpected: %d", rma
);
2556 static void ieee80211_sta_timer(unsigned long data
)
2558 struct ieee80211_sub_if_data
*sdata
=
2559 (struct ieee80211_sub_if_data
*) data
;
2560 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2561 struct ieee80211_local
*local
= sdata
->local
;
2563 if (local
->quiescing
) {
2564 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2568 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2571 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2572 u8
*bssid
, u8 reason
)
2574 struct ieee80211_local
*local
= sdata
->local
;
2575 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2576 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2578 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2579 IEEE80211_STA_BEACON_POLL
);
2581 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2583 mutex_unlock(&ifmgd
->mtx
);
2586 * must be outside lock due to cfg80211,
2587 * but that's not a problem.
2589 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2591 mutex_lock(&local
->mtx
);
2592 ieee80211_recalc_idle(local
);
2593 mutex_unlock(&local
->mtx
);
2595 mutex_lock(&ifmgd
->mtx
);
2598 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2600 struct ieee80211_local
*local
= sdata
->local
;
2601 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2602 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2604 lockdep_assert_held(&ifmgd
->mtx
);
2606 if (WARN_ON_ONCE(!auth_data
))
2611 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2612 printk(KERN_DEBUG
"%s: authentication with %pM timed out\n",
2613 sdata
->name
, auth_data
->bss
->bssid
);
2616 * Most likely AP is not in the range so remove the
2617 * bss struct for that AP.
2619 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2624 if (auth_data
->bss
->proberesp_ies
) {
2625 printk(KERN_DEBUG
"%s: send auth to %pM (try %d/%d)\n",
2626 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2627 IEEE80211_AUTH_MAX_TRIES
);
2629 auth_data
->expected_transaction
= 2;
2630 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2631 auth_data
->ie
, auth_data
->ie_len
,
2632 auth_data
->bss
->bssid
,
2633 auth_data
->bss
->bssid
, NULL
, 0, 0);
2637 printk(KERN_DEBUG
"%s: direct probe to %pM (try %d/%i)\n",
2638 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2639 IEEE80211_AUTH_MAX_TRIES
);
2641 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2645 * Direct probe is sent to broadcast address as some APs
2646 * will not answer to direct packet in unassociated state.
2648 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2649 NULL
, 0, (u32
) -1, true, false);
2652 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2653 run_again(ifmgd
, auth_data
->timeout
);
2658 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2660 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2661 struct ieee80211_local
*local
= sdata
->local
;
2663 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2665 assoc_data
->tries
++;
2666 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2667 printk(KERN_DEBUG
"%s: association with %pM timed out\n",
2668 sdata
->name
, assoc_data
->bss
->bssid
);
2671 * Most likely AP is not in the range so remove the
2672 * bss struct for that AP.
2674 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2679 printk(KERN_DEBUG
"%s: associate with %pM (try %d/%d)\n",
2680 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2681 IEEE80211_ASSOC_MAX_TRIES
);
2682 ieee80211_send_assoc(sdata
);
2684 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2685 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2690 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2692 struct ieee80211_local
*local
= sdata
->local
;
2693 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2695 mutex_lock(&ifmgd
->mtx
);
2697 if (ifmgd
->auth_data
&&
2698 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2699 if (ifmgd
->auth_data
->done
) {
2701 * ok ... we waited for assoc but userspace didn't,
2702 * so let's just kill the auth data
2704 ieee80211_destroy_auth_data(sdata
, false);
2705 } else if (ieee80211_probe_auth(sdata
)) {
2708 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2710 ieee80211_destroy_auth_data(sdata
, false);
2712 mutex_unlock(&ifmgd
->mtx
);
2713 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2714 mutex_lock(&ifmgd
->mtx
);
2716 } else if (ifmgd
->auth_data
)
2717 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2719 if (ifmgd
->assoc_data
&&
2720 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2721 if (!ifmgd
->assoc_data
->have_beacon
||
2722 ieee80211_do_assoc(sdata
)) {
2725 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2727 ieee80211_destroy_assoc_data(sdata
, false);
2729 mutex_unlock(&ifmgd
->mtx
);
2730 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2731 mutex_lock(&ifmgd
->mtx
);
2733 } else if (ifmgd
->assoc_data
)
2734 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2736 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2737 IEEE80211_STA_CONNECTION_POLL
) &&
2738 ifmgd
->associated
) {
2742 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2744 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2745 max_tries
= max_nullfunc_tries
;
2747 max_tries
= max_probe_tries
;
2749 /* ACK received for nullfunc probing frame */
2750 if (!ifmgd
->probe_send_count
)
2751 ieee80211_reset_ap_probe(sdata
);
2752 else if (ifmgd
->nullfunc_failed
) {
2753 if (ifmgd
->probe_send_count
< max_tries
) {
2754 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2755 wiphy_debug(local
->hw
.wiphy
,
2756 "%s: No ack for nullfunc frame to"
2757 " AP %pM, try %d/%i\n",
2759 ifmgd
->probe_send_count
, max_tries
);
2761 ieee80211_mgd_probe_ap_send(sdata
);
2763 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2764 wiphy_debug(local
->hw
.wiphy
,
2765 "%s: No ack for nullfunc frame to"
2766 " AP %pM, disconnecting.\n",
2767 sdata
->name
, bssid
);
2769 ieee80211_sta_connection_lost(sdata
, bssid
,
2770 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2772 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2773 run_again(ifmgd
, ifmgd
->probe_timeout
);
2774 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2775 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2776 wiphy_debug(local
->hw
.wiphy
,
2777 "%s: Failed to send nullfunc to AP %pM"
2778 " after %dms, disconnecting.\n",
2780 bssid
, probe_wait_ms
);
2782 ieee80211_sta_connection_lost(sdata
, bssid
,
2783 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2784 } else if (ifmgd
->probe_send_count
< max_tries
) {
2785 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2786 wiphy_debug(local
->hw
.wiphy
,
2787 "%s: No probe response from AP %pM"
2788 " after %dms, try %d/%i\n",
2790 bssid
, probe_wait_ms
,
2791 ifmgd
->probe_send_count
, max_tries
);
2793 ieee80211_mgd_probe_ap_send(sdata
);
2796 * We actually lost the connection ... or did we?
2799 wiphy_debug(local
->hw
.wiphy
,
2800 "%s: No probe response from AP %pM"
2801 " after %dms, disconnecting.\n",
2803 bssid
, probe_wait_ms
);
2805 ieee80211_sta_connection_lost(sdata
, bssid
,
2806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2810 mutex_unlock(&ifmgd
->mtx
);
2812 mutex_lock(&local
->mtx
);
2813 ieee80211_recalc_idle(local
);
2814 mutex_unlock(&local
->mtx
);
2817 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2819 struct ieee80211_sub_if_data
*sdata
=
2820 (struct ieee80211_sub_if_data
*) data
;
2821 struct ieee80211_local
*local
= sdata
->local
;
2823 if (local
->quiescing
)
2826 ieee80211_queue_work(&sdata
->local
->hw
,
2827 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2830 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2832 struct ieee80211_sub_if_data
*sdata
=
2833 (struct ieee80211_sub_if_data
*) data
;
2834 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2835 struct ieee80211_local
*local
= sdata
->local
;
2837 if (local
->quiescing
)
2840 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2843 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2845 struct ieee80211_sub_if_data
*sdata
=
2846 container_of(work
, struct ieee80211_sub_if_data
,
2847 u
.mgd
.monitor_work
);
2849 ieee80211_mgd_probe_ap(sdata
, false);
2852 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2856 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2857 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2858 IEEE80211_STA_CONNECTION_POLL
);
2860 /* let's probe the connection once */
2861 flags
= sdata
->local
->hw
.flags
;
2862 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2863 ieee80211_queue_work(&sdata
->local
->hw
,
2864 &sdata
->u
.mgd
.monitor_work
);
2865 /* and do all the other regular work too */
2866 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2871 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2873 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2876 * we need to use atomic bitops for the running bits
2877 * only because both timers might fire at the same
2878 * time -- the code here is properly synchronised.
2881 cancel_work_sync(&ifmgd
->request_smps_work
);
2883 cancel_work_sync(&ifmgd
->monitor_work
);
2884 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2885 if (del_timer_sync(&ifmgd
->timer
))
2886 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2888 cancel_work_sync(&ifmgd
->chswitch_work
);
2889 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2890 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2892 /* these will just be re-established on connection */
2893 del_timer_sync(&ifmgd
->conn_mon_timer
);
2894 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2897 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2899 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2901 if (!ifmgd
->associated
)
2904 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2905 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2906 mutex_lock(&ifmgd
->mtx
);
2907 if (ifmgd
->associated
) {
2908 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2909 wiphy_debug(sdata
->local
->hw
.wiphy
,
2910 "%s: driver requested disconnect after resume.\n",
2913 ieee80211_sta_connection_lost(sdata
,
2914 ifmgd
->associated
->bssid
,
2915 WLAN_REASON_UNSPECIFIED
);
2916 mutex_unlock(&ifmgd
->mtx
);
2919 mutex_unlock(&ifmgd
->mtx
);
2922 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2923 add_timer(&ifmgd
->timer
);
2924 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2925 add_timer(&ifmgd
->chswitch_timer
);
2926 ieee80211_sta_reset_beacon_monitor(sdata
);
2927 ieee80211_restart_sta_timer(sdata
);
2931 /* interface setup */
2932 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2934 struct ieee80211_if_managed
*ifmgd
;
2936 ifmgd
= &sdata
->u
.mgd
;
2937 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2938 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2939 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2940 ieee80211_beacon_connection_loss_work
);
2941 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2942 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2943 (unsigned long) sdata
);
2944 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2945 (unsigned long) sdata
);
2946 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2947 (unsigned long) sdata
);
2948 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2949 (unsigned long) sdata
);
2952 ifmgd
->powersave
= sdata
->wdev
.ps
;
2953 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2954 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2956 mutex_init(&ifmgd
->mtx
);
2958 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2959 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2961 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2964 /* scan finished notification */
2965 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2967 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2969 /* Restart STA timers */
2971 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2972 ieee80211_restart_sta_timer(sdata
);
2976 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2977 unsigned long data
, void *dummy
)
2979 s32 latency_usec
= (s32
) data
;
2980 struct ieee80211_local
*local
=
2981 container_of(nb
, struct ieee80211_local
,
2982 network_latency_notifier
);
2984 mutex_lock(&local
->iflist_mtx
);
2985 ieee80211_recalc_ps(local
, latency_usec
);
2986 mutex_unlock(&local
->iflist_mtx
);
2991 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
2992 struct cfg80211_bss
*cbss
, bool assoc
)
2994 struct ieee80211_local
*local
= sdata
->local
;
2995 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2996 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
2997 struct sta_info
*sta
;
2998 bool have_sta
= false;
3001 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3002 const u8
*ht_oper_ie
;
3003 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3004 struct ieee80211_supported_band
*sband
;
3006 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3011 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3016 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3021 mutex_lock(&local
->mtx
);
3022 ieee80211_recalc_idle(sdata
->local
);
3023 mutex_unlock(&local
->mtx
);
3025 /* switch to the right channel */
3026 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3028 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3030 if (sband
->ht_cap
.ht_supported
) {
3031 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3032 cbss
->information_elements
,
3033 cbss
->len_information_elements
);
3034 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3035 ht_oper
= (void *)(ht_oper_ie
+ 2);
3039 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3040 cbss
->channel
->band
);
3041 /* check that channel matches the right operating channel */
3042 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3044 * It's possible that some APs are confused here;
3045 * Netgear WNDR3700 sometimes reports 4 higher than
3046 * the actual channel in association responses, but
3047 * since we look at probe response/beacon data here
3051 "%s: Wrong control channel: center-freq: %d"
3052 " ht-cfreq: %d ht->primary_chan: %d"
3053 " band: %d. Disabling HT.\n",
3054 sdata
->name
, cbss
->channel
->center_freq
,
3055 ht_cfreq
, ht_oper
->primary_chan
,
3056 cbss
->channel
->band
);
3062 channel_type
= NL80211_CHAN_HT20
;
3064 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3065 switch (ht_oper
->ht_param
&
3066 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3067 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3068 channel_type
= NL80211_CHAN_HT40PLUS
;
3070 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3071 channel_type
= NL80211_CHAN_HT40MINUS
;
3077 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3078 /* can only fail due to HT40+/- mismatch */
3079 channel_type
= NL80211_CHAN_HT20
;
3081 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3083 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3084 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3088 local
->oper_channel
= cbss
->channel
;
3089 ieee80211_hw_config(local
, 0);
3092 u32 rates
= 0, basic_rates
= 0;
3093 bool have_higher_than_11mbit
;
3094 int min_rate
= INT_MAX
, min_rate_index
= -1;
3096 ieee80211_get_rates(sband
, bss
->supp_rates
,
3097 bss
->supp_rates_len
,
3098 &rates
, &basic_rates
,
3099 &have_higher_than_11mbit
,
3100 &min_rate
, &min_rate_index
);
3103 * This used to be a workaround for basic rates missing
3104 * in the association response frame. Now that we no
3105 * longer use the basic rates from there, it probably
3106 * doesn't happen any more, but keep the workaround so
3107 * in case some *other* APs are buggy in different ways
3108 * we can connect -- with a warning.
3110 if (!basic_rates
&& min_rate_index
>= 0) {
3112 "%s: No basic rates, using min rate instead.\n",
3114 basic_rates
= BIT(min_rate_index
);
3117 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3118 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3120 /* cf. IEEE 802.11 9.2.12 */
3121 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3122 have_higher_than_11mbit
)
3123 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3125 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3127 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3129 /* tell driver about BSSID and basic rates */
3130 ieee80211_bss_info_change_notify(sdata
,
3131 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3134 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3136 err
= sta_info_insert(sta
);
3140 "%s: failed to insert STA entry for the AP (error %d)\n",
3145 WARN_ON_ONCE(compare_ether_addr(ifmgd
->bssid
, cbss
->bssid
));
3151 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3152 struct cfg80211_auth_request
*req
)
3154 struct ieee80211_local
*local
= sdata
->local
;
3155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3156 struct ieee80211_mgd_auth_data
*auth_data
;
3160 /* prepare auth data structure */
3162 switch (req
->auth_type
) {
3163 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3164 auth_alg
= WLAN_AUTH_OPEN
;
3166 case NL80211_AUTHTYPE_SHARED_KEY
:
3167 if (IS_ERR(local
->wep_tx_tfm
))
3169 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3171 case NL80211_AUTHTYPE_FT
:
3172 auth_alg
= WLAN_AUTH_FT
;
3174 case NL80211_AUTHTYPE_NETWORK_EAP
:
3175 auth_alg
= WLAN_AUTH_LEAP
;
3181 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3185 auth_data
->bss
= req
->bss
;
3187 if (req
->ie
&& req
->ie_len
) {
3188 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3189 auth_data
->ie_len
= req
->ie_len
;
3192 if (req
->key
&& req
->key_len
) {
3193 auth_data
->key_len
= req
->key_len
;
3194 auth_data
->key_idx
= req
->key_idx
;
3195 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3198 auth_data
->algorithm
= auth_alg
;
3200 /* try to authenticate/probe */
3202 mutex_lock(&ifmgd
->mtx
);
3204 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3205 ifmgd
->assoc_data
) {
3210 if (ifmgd
->auth_data
)
3211 ieee80211_destroy_auth_data(sdata
, false);
3213 /* prep auth_data so we don't go into idle on disassoc */
3214 ifmgd
->auth_data
= auth_data
;
3216 if (ifmgd
->associated
)
3217 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3219 printk(KERN_DEBUG
"%s: authenticate with %pM\n",
3220 sdata
->name
, req
->bss
->bssid
);
3222 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3226 err
= ieee80211_probe_auth(sdata
);
3228 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3232 /* hold our own reference */
3233 cfg80211_ref_bss(auth_data
->bss
);
3238 ifmgd
->auth_data
= NULL
;
3242 mutex_unlock(&ifmgd
->mtx
);
3247 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3248 struct cfg80211_assoc_request
*req
)
3250 struct ieee80211_local
*local
= sdata
->local
;
3251 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3252 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3253 struct ieee80211_mgd_assoc_data
*assoc_data
;
3254 struct ieee80211_supported_band
*sband
;
3258 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3262 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3266 mutex_lock(&ifmgd
->mtx
);
3268 if (ifmgd
->associated
)
3269 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3271 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3276 if (ifmgd
->assoc_data
) {
3281 if (ifmgd
->auth_data
) {
3284 /* keep sta info, bssid if matching */
3285 match
= compare_ether_addr(ifmgd
->bssid
, req
->bss
->bssid
) == 0;
3286 ieee80211_destroy_auth_data(sdata
, match
);
3289 /* prepare assoc data */
3291 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3292 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3294 ifmgd
->beacon_crc_valid
= false;
3297 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3298 * We still associate in non-HT mode (11a/b/g) if any one of these
3299 * ciphers is configured as pairwise.
3300 * We can set this to true for non-11n hardware, that'll be checked
3301 * separately along with the peer capabilities.
3303 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
3304 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3305 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3306 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
3307 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3309 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3310 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3312 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3313 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3314 if (!sband
->ht_cap
.ht_supported
||
3315 local
->hw
.queues
< 4 || !bss
->wmm_used
)
3316 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3318 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3319 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3320 sizeof(ifmgd
->ht_capa_mask
));
3322 if (req
->ie
&& req
->ie_len
) {
3323 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3324 assoc_data
->ie_len
= req
->ie_len
;
3327 assoc_data
->bss
= req
->bss
;
3329 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3330 if (ifmgd
->powersave
)
3331 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3333 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3335 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3337 assoc_data
->capability
= req
->bss
->capability
;
3338 assoc_data
->wmm
= bss
->wmm_used
&& (local
->hw
.queues
>= 4);
3339 assoc_data
->supp_rates
= bss
->supp_rates
;
3340 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3341 assoc_data
->ht_operation_ie
=
3342 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3344 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3345 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3346 assoc_data
->uapsd
= true;
3347 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3349 assoc_data
->uapsd
= false;
3350 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3353 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3354 assoc_data
->ssid_len
= ssidie
[1];
3356 if (req
->prev_bssid
)
3357 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3360 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3361 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3363 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3364 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3367 if (req
->crypto
.control_port
)
3368 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3370 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3372 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3373 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3375 /* kick off associate process */
3377 ifmgd
->assoc_data
= assoc_data
;
3379 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3383 if (!bss
->dtim_period
&&
3384 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3386 * Wait up to one beacon interval ...
3387 * should this be more if we miss one?
3389 printk(KERN_DEBUG
"%s: waiting for beacon from %pM\n",
3390 sdata
->name
, ifmgd
->bssid
);
3391 assoc_data
->timeout
= jiffies
+
3392 TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3394 assoc_data
->have_beacon
= true;
3395 assoc_data
->sent_assoc
= false;
3396 assoc_data
->timeout
= jiffies
;
3398 run_again(ifmgd
, assoc_data
->timeout
);
3400 if (bss
->corrupt_data
) {
3401 char *corrupt_type
= "data";
3402 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3403 if (bss
->corrupt_data
&
3404 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3405 corrupt_type
= "beacon and probe response";
3407 corrupt_type
= "beacon";
3408 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3409 corrupt_type
= "probe response";
3410 printk(KERN_DEBUG
"%s: associating with AP with corrupt %s\n",
3411 sdata
->name
, corrupt_type
);
3417 ifmgd
->assoc_data
= NULL
;
3421 mutex_unlock(&ifmgd
->mtx
);
3426 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3427 struct cfg80211_deauth_request
*req
)
3429 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3430 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3432 mutex_lock(&ifmgd
->mtx
);
3434 if (ifmgd
->auth_data
) {
3435 ieee80211_destroy_auth_data(sdata
, false);
3436 mutex_unlock(&ifmgd
->mtx
);
3441 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3442 sdata
->name
, req
->bssid
, req
->reason_code
);
3444 if (ifmgd
->associated
&&
3445 compare_ether_addr(ifmgd
->associated
->bssid
, req
->bssid
) == 0)
3446 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3447 req
->reason_code
, true, frame_buf
);
3449 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3450 IEEE80211_STYPE_DEAUTH
,
3451 req
->reason_code
, true,
3453 mutex_unlock(&ifmgd
->mtx
);
3455 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3457 mutex_lock(&sdata
->local
->mtx
);
3458 ieee80211_recalc_idle(sdata
->local
);
3459 mutex_unlock(&sdata
->local
->mtx
);
3464 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3465 struct cfg80211_disassoc_request
*req
)
3467 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3469 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3471 mutex_lock(&ifmgd
->mtx
);
3474 * cfg80211 should catch this ... but it's racy since
3475 * we can receive a disassoc frame, process it, hand it
3476 * to cfg80211 while that's in a locked section already
3477 * trying to tell us that the user wants to disconnect.
3479 if (ifmgd
->associated
!= req
->bss
) {
3480 mutex_unlock(&ifmgd
->mtx
);
3484 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
3485 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3487 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3488 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3489 req
->reason_code
, !req
->local_state_change
,
3491 mutex_unlock(&ifmgd
->mtx
);
3493 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3495 mutex_lock(&sdata
->local
->mtx
);
3496 ieee80211_recalc_idle(sdata
->local
);
3497 mutex_unlock(&sdata
->local
->mtx
);
3502 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data
*sdata
)
3504 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3506 mutex_lock(&ifmgd
->mtx
);
3507 if (ifmgd
->assoc_data
)
3508 ieee80211_destroy_assoc_data(sdata
, false);
3509 if (ifmgd
->auth_data
)
3510 ieee80211_destroy_auth_data(sdata
, false);
3511 del_timer_sync(&ifmgd
->timer
);
3512 mutex_unlock(&ifmgd
->mtx
);
3515 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3516 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3519 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3521 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3523 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3525 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
3527 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
3529 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3530 return sdata
->dev
->operstate
;
3532 EXPORT_SYMBOL(ieee80211_get_operstate
);