2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
122 lockdep_assert_held(&ifmgd
->mtx
);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
137 ASSERT_MGD_MTX(ifmgd
);
139 if (!timer_pending(&ifmgd
->timer
) ||
140 time_before(timeout
, ifmgd
->timer
.expires
))
141 mod_timer(&ifmgd
->timer
, timeout
);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
146 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
149 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
150 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 if (unlikely(!sdata
->u
.mgd
.associated
))
160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
163 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
164 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
166 ifmgd
->probe_send_count
= 0;
169 static int ecw2cw(int ecw
)
171 return (1 << ecw
) - 1;
174 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
175 struct ieee80211_ht_operation
*ht_oper
,
176 const u8
*bssid
, bool reconfig
)
178 struct ieee80211_local
*local
= sdata
->local
;
179 struct ieee80211_supported_band
*sband
;
180 struct sta_info
*sta
;
183 bool disable_40
= false;
185 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
187 switch (sdata
->vif
.bss_conf
.channel_type
) {
188 case NL80211_CHAN_HT40PLUS
:
189 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
192 case NL80211_CHAN_HT40MINUS
:
193 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
204 mutex_lock(&local
->sta_mtx
);
205 sta
= sta_info_get(sdata
, bssid
);
209 if (sta
&& !sta
->supports_40mhz
)
212 if (sta
&& (!reconfig
||
213 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
217 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
219 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
221 rate_control_rate_update(local
, sband
, sta
,
222 IEEE80211_RC_BW_CHANGED
);
224 mutex_unlock(&local
->sta_mtx
);
226 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
228 /* if bss configuration changed store the new one */
229 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
230 changed
|= BSS_CHANGED_HT
;
231 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
240 struct ieee80211_supported_band
*sband
,
246 for (i
= 0; i
< supp_rates_len
; i
++) {
247 int rate
= (supp_rates
[i
] & 0x7F) * 5;
249 for (j
= 0; j
< sband
->n_bitrates
; j
++)
250 if (sband
->bitrates
[j
].bitrate
== rate
) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
261 struct sk_buff
*skb
, const u8
*ht_oper_ie
,
262 struct ieee80211_supported_band
*sband
,
263 struct ieee80211_channel
*channel
,
264 enum ieee80211_smps_mode smps
)
266 struct ieee80211_ht_operation
*ht_oper
;
268 u32 flags
= channel
->flags
;
270 struct ieee80211_sta_ht_cap ht_cap
;
272 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
277 if (ht_oper_ie
[1] < sizeof(struct ieee80211_ht_operation
))
280 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
281 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
283 ht_oper
= (struct ieee80211_ht_operation
*)(ht_oper_ie
+ 2);
285 /* determine capability flags */
288 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
290 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
291 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
292 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
296 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
297 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
298 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
308 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
309 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
310 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
313 /* set SM PS mode properly */
314 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
316 case IEEE80211_SMPS_AUTOMATIC
:
317 case IEEE80211_SMPS_NUM_MODES
:
319 case IEEE80211_SMPS_OFF
:
320 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
321 IEEE80211_HT_CAP_SM_PS_SHIFT
;
323 case IEEE80211_SMPS_STATIC
:
324 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
325 IEEE80211_HT_CAP_SM_PS_SHIFT
;
327 case IEEE80211_SMPS_DYNAMIC
:
328 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
329 IEEE80211_HT_CAP_SM_PS_SHIFT
;
333 /* reserve and fill IE */
334 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
335 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
338 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
340 struct ieee80211_local
*local
= sdata
->local
;
341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
342 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
344 struct ieee80211_mgmt
*mgmt
;
346 size_t offset
= 0, noffset
;
347 int i
, count
, rates_len
, supp_rates_len
;
349 struct ieee80211_supported_band
*sband
;
352 lockdep_assert_held(&ifmgd
->mtx
);
354 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
356 if (assoc_data
->supp_rates_len
) {
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
363 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
364 assoc_data
->supp_rates_len
,
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
373 rates_len
= sband
->n_bitrates
;
376 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
377 sizeof(*mgmt
) + /* bit too much but doesn't matter */
378 2 + assoc_data
->ssid_len
+ /* SSID */
379 4 + rates_len
+ /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband
->n_channels
+ /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
383 assoc_data
->ie_len
+ /* extra IEs */
389 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
391 capab
= WLAN_CAPABILITY_ESS
;
393 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
394 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
395 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
396 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
397 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
400 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
401 capab
|= WLAN_CAPABILITY_PRIVACY
;
403 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
404 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
405 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
407 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
409 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
410 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
411 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
413 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
415 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
416 IEEE80211_STYPE_REASSOC_REQ
);
417 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
418 mgmt
->u
.reassoc_req
.listen_interval
=
419 cpu_to_le16(local
->hw
.conf
.listen_interval
);
420 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
424 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
425 IEEE80211_STYPE_ASSOC_REQ
);
426 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
427 mgmt
->u
.assoc_req
.listen_interval
=
428 cpu_to_le16(local
->hw
.conf
.listen_interval
);
432 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
433 *pos
++ = WLAN_EID_SSID
;
434 *pos
++ = assoc_data
->ssid_len
;
435 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
437 /* add all rates which were marked to be used above */
438 supp_rates_len
= rates_len
;
439 if (supp_rates_len
> 8)
442 pos
= skb_put(skb
, supp_rates_len
+ 2);
443 *pos
++ = WLAN_EID_SUPP_RATES
;
444 *pos
++ = supp_rates_len
;
447 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
448 if (BIT(i
) & rates
) {
449 int rate
= sband
->bitrates
[i
].bitrate
;
450 *pos
++ = (u8
) (rate
/ 5);
456 if (rates_len
> count
) {
457 pos
= skb_put(skb
, rates_len
- count
+ 2);
458 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
459 *pos
++ = rates_len
- count
;
461 for (i
++; i
< sband
->n_bitrates
; i
++) {
462 if (BIT(i
) & rates
) {
463 int rate
= sband
->bitrates
[i
].bitrate
;
464 *pos
++ = (u8
) (rate
/ 5);
469 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
470 /* 1. power capabilities */
471 pos
= skb_put(skb
, 4);
472 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
474 *pos
++ = 0; /* min tx power */
475 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
480 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
481 *pos
++ = 2 * sband
->n_channels
;
482 for (i
= 0; i
< sband
->n_channels
; i
++) {
483 *pos
++ = ieee80211_frequency_to_channel(
484 sband
->channels
[i
].center_freq
);
485 *pos
++ = 1; /* one channel in the subband*/
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
491 static const u8 before_ht
[] = {
494 WLAN_EID_EXT_SUPP_RATES
,
495 WLAN_EID_PWR_CAPABILITY
,
496 WLAN_EID_SUPPORTED_CHANNELS
,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
500 WLAN_EID_MOBILITY_DOMAIN
,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
503 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
504 before_ht
, ARRAY_SIZE(before_ht
),
506 pos
= skb_put(skb
, noffset
- offset
);
507 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
511 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
512 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ht_operation_ie
,
513 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
517 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
520 pos
= skb_put(skb
, noffset
- offset
);
521 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
525 if (assoc_data
->wmm
) {
526 if (assoc_data
->uapsd
) {
527 qos_info
= ifmgd
->uapsd_queues
;
528 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
534 pos
= skb_put(skb
, 9);
535 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
536 *pos
++ = 7; /* len */
537 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
540 *pos
++ = 2; /* WME */
541 *pos
++ = 0; /* WME info */
542 *pos
++ = 1; /* WME ver */
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
548 noffset
= assoc_data
->ie_len
;
549 pos
= skb_put(skb
, noffset
- offset
);
550 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
553 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
554 ieee80211_tx_skb(sdata
, skb
);
557 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
558 const u8
*bssid
, u16 stype
,
559 u16 reason
, bool send_frame
,
562 struct ieee80211_local
*local
= sdata
->local
;
563 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
565 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
568 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
569 mgmt
->duration
= 0; /* initialize only */
570 mgmt
->seq_ctrl
= 0; /* initialize only */
571 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
572 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
573 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
574 /* u.deauth.reason_code == u.disassoc.reason_code */
575 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
578 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
579 DEAUTH_DISASSOC_LEN
);
583 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
586 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
587 mgmt
, DEAUTH_DISASSOC_LEN
);
589 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
590 IEEE80211_SKB_CB(skb
)->flags
|=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
592 ieee80211_tx_skb(sdata
, skb
);
596 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
597 struct ieee80211_sub_if_data
*sdata
)
599 struct ieee80211_pspoll
*pspoll
;
602 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
606 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
607 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
609 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
610 ieee80211_tx_skb(sdata
, skb
);
613 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
614 struct ieee80211_sub_if_data
*sdata
,
618 struct ieee80211_hdr_3addr
*nullfunc
;
619 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
621 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
625 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
627 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
629 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
630 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
631 IEEE80211_STA_CONNECTION_POLL
))
632 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
634 ieee80211_tx_skb(sdata
, skb
);
637 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
638 struct ieee80211_sub_if_data
*sdata
)
641 struct ieee80211_hdr
*nullfunc
;
644 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
647 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
651 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
653 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
654 memset(nullfunc
, 0, 30);
655 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
656 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
657 nullfunc
->frame_control
= fc
;
658 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
659 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
660 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
661 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
663 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
664 ieee80211_tx_skb(sdata
, skb
);
667 /* spectrum management related things */
668 static void ieee80211_chswitch_work(struct work_struct
*work
)
670 struct ieee80211_sub_if_data
*sdata
=
671 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
672 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
674 if (!ieee80211_sdata_running(sdata
))
677 mutex_lock(&ifmgd
->mtx
);
678 if (!ifmgd
->associated
)
681 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
682 if (!sdata
->local
->ops
->channel_switch
) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata
->local
,
685 IEEE80211_CONF_CHANGE_CHANNEL
);
687 /* update the device channel directly */
688 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
691 /* XXX: shouldn't really modify cfg80211-owned data! */
692 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
694 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
695 IEEE80211_QUEUE_STOP_REASON_CSA
);
697 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
698 mutex_unlock(&ifmgd
->mtx
);
701 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
703 struct ieee80211_sub_if_data
*sdata
;
704 struct ieee80211_if_managed
*ifmgd
;
706 sdata
= vif_to_sdata(vif
);
707 ifmgd
= &sdata
->u
.mgd
;
709 trace_api_chswitch_done(sdata
, success
);
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
717 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
720 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
722 EXPORT_SYMBOL(ieee80211_chswitch_done
);
724 static void ieee80211_chswitch_timer(unsigned long data
)
726 struct ieee80211_sub_if_data
*sdata
=
727 (struct ieee80211_sub_if_data
*) data
;
728 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
730 if (sdata
->local
->quiescing
) {
731 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
735 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
738 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
739 struct ieee80211_channel_sw_ie
*sw_elem
,
740 struct ieee80211_bss
*bss
,
743 struct cfg80211_bss
*cbss
=
744 container_of((void *)bss
, struct cfg80211_bss
, priv
);
745 struct ieee80211_channel
*new_ch
;
746 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
747 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
748 cbss
->channel
->band
);
750 ASSERT_MGD_MTX(ifmgd
);
752 if (!ifmgd
->associated
)
755 if (sdata
->local
->scanning
)
758 /* Disregard subsequent beacons if we are already running a timer
761 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
764 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
765 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
768 sdata
->local
->csa_channel
= new_ch
;
770 if (sdata
->local
->ops
->channel_switch
) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch
;
773 memset(&ch_switch
, 0, sizeof(ch_switch
));
774 ch_switch
.timestamp
= timestamp
;
776 ch_switch
.block_tx
= true;
777 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
778 IEEE80211_QUEUE_STOP_REASON_CSA
);
780 ch_switch
.channel
= new_ch
;
781 ch_switch
.count
= sw_elem
->count
;
782 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
783 drv_channel_switch(sdata
->local
, &ch_switch
);
787 /* channel switch handled in software */
788 if (sw_elem
->count
<= 1) {
789 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
792 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
793 IEEE80211_QUEUE_STOP_REASON_CSA
);
794 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
795 mod_timer(&ifmgd
->chswitch_timer
,
797 msecs_to_jiffies(sw_elem
->count
*
798 cbss
->beacon_interval
));
802 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
803 u16 capab_info
, u8
*pwr_constr_elem
,
804 u8 pwr_constr_elem_len
)
806 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
808 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len
!= 1)
815 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
816 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
817 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
818 ieee80211_hw_config(sdata
->local
, 0);
822 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
824 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
825 struct ieee80211_local
*local
= sdata
->local
;
826 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
828 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
829 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
830 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
832 local
->disable_dynamic_ps
= false;
833 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
835 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
837 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
839 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
840 struct ieee80211_local
*local
= sdata
->local
;
841 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
843 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
844 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
845 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
847 local
->disable_dynamic_ps
= true;
848 conf
->dynamic_ps_timeout
= 0;
849 del_timer_sync(&local
->dynamic_ps_timer
);
850 ieee80211_queue_work(&local
->hw
,
851 &local
->dynamic_ps_enable_work
);
853 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
856 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
857 struct ieee80211_sub_if_data
*sdata
)
859 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
868 if (conf
->dynamic_ps_timeout
> 0 &&
869 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
870 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
871 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
873 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
874 ieee80211_send_nullfunc(local
, sdata
, 1);
876 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
877 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
880 conf
->flags
|= IEEE80211_CONF_PS
;
881 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
885 static void ieee80211_change_ps(struct ieee80211_local
*local
)
887 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
889 if (local
->ps_sdata
) {
890 ieee80211_enable_ps(local
, local
->ps_sdata
);
891 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
892 conf
->flags
&= ~IEEE80211_CONF_PS
;
893 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
894 del_timer_sync(&local
->dynamic_ps_timer
);
895 cancel_work_sync(&local
->dynamic_ps_enable_work
);
899 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
901 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
902 struct sta_info
*sta
= NULL
;
903 bool authorized
= false;
911 if (!mgd
->associated
)
914 if (!mgd
->associated
->beacon_ies
)
917 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
918 IEEE80211_STA_CONNECTION_POLL
))
922 sta
= sta_info_get(sdata
, mgd
->bssid
);
924 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
930 /* need to hold RTNL or interface lock */
931 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
933 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
937 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
938 local
->ps_sdata
= NULL
;
942 if (!list_empty(&local
->work_list
)) {
943 local
->ps_sdata
= NULL
;
947 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
948 if (!ieee80211_sdata_running(sdata
))
950 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
958 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
964 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
965 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
969 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
971 beaconint_us
= ieee80211_tu_to_usec(
972 found
->vif
.bss_conf
.beacon_int
);
974 timeout
= local
->dynamic_ps_forced_timeout
;
977 * Go to full PSM if the user configures a very low
978 * latency requirement.
979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
983 if (latency
> (1900 * USEC_PER_MSEC
) &&
984 latency
!= (2000 * USEC_PER_SEC
))
989 local
->dynamic_ps_user_timeout
= timeout
;
990 if (!local
->disable_dynamic_ps
)
991 conf
->dynamic_ps_timeout
=
992 local
->dynamic_ps_user_timeout
;
994 if (beaconint_us
> latency
) {
995 local
->ps_sdata
= NULL
;
997 struct ieee80211_bss
*bss
;
1001 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1002 dtimper
= bss
->dtim_period
;
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1007 else if (dtimper
> 1)
1008 maxslp
= min_t(int, dtimper
,
1009 latency
/ beaconint_us
);
1011 local
->hw
.conf
.max_sleep_period
= maxslp
;
1012 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1013 local
->ps_sdata
= found
;
1016 local
->ps_sdata
= NULL
;
1020 ieee80211_change_ps(local
);
1023 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1025 struct ieee80211_local
*local
=
1026 container_of(work
, struct ieee80211_local
,
1027 dynamic_ps_disable_work
);
1029 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1030 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1031 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1034 ieee80211_wake_queues_by_reason(&local
->hw
,
1035 IEEE80211_QUEUE_STOP_REASON_PS
);
1038 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1040 struct ieee80211_local
*local
=
1041 container_of(work
, struct ieee80211_local
,
1042 dynamic_ps_enable_work
);
1043 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1044 struct ieee80211_if_managed
*ifmgd
;
1045 unsigned long flags
;
1048 /* can only happen when PS was just disabled anyway */
1052 ifmgd
= &sdata
->u
.mgd
;
1054 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1057 if (!local
->disable_dynamic_ps
&&
1058 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local
)) {
1061 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1063 local
->hw
.conf
.dynamic_ps_timeout
));
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1072 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1073 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1074 if (local
->queue_stop_reasons
[q
]) {
1075 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1077 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1079 local
->hw
.conf
.dynamic_ps_timeout
));
1083 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1086 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1087 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1088 netif_tx_stop_all_queues(sdata
->dev
);
1090 if (drv_tx_frames_pending(local
))
1091 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1093 local
->hw
.conf
.dynamic_ps_timeout
));
1095 ieee80211_send_nullfunc(local
, sdata
, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local
, false);
1101 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1102 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1103 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1104 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1105 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1106 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1109 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1110 netif_tx_wake_all_queues(sdata
->dev
);
1113 void ieee80211_dynamic_ps_timer(unsigned long data
)
1115 struct ieee80211_local
*local
= (void *) data
;
1117 if (local
->quiescing
|| local
->suspended
)
1120 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1124 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1125 struct ieee80211_sub_if_data
*sdata
,
1126 u8
*wmm_param
, size_t wmm_param_len
)
1128 struct ieee80211_tx_queue_params params
;
1129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1132 u8
*pos
, uapsd_queues
= 0;
1134 if (!local
->ops
->conf_tx
)
1137 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1143 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1146 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1147 uapsd_queues
= ifmgd
->uapsd_queues
;
1149 count
= wmm_param
[6] & 0x0f;
1150 if (count
== ifmgd
->wmm_last_param_set
)
1152 ifmgd
->wmm_last_param_set
= count
;
1154 pos
= wmm_param
+ 8;
1155 left
= wmm_param_len
- 8;
1157 memset(¶ms
, 0, sizeof(params
));
1160 for (; left
>= 4; left
-= 4, pos
+= 4) {
1161 int aci
= (pos
[0] >> 5) & 0x03;
1162 int acm
= (pos
[0] >> 4) & 0x01;
1170 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1171 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1177 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1178 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1184 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1185 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1192 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1193 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1198 params
.aifs
= pos
[0] & 0x0f;
1199 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1200 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1201 params
.txop
= get_unaligned_le16(pos
+ 2);
1202 params
.uapsd
= uapsd
;
1204 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1205 wiphy_debug(local
->hw
.wiphy
,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1209 params
.aifs
, params
.cw_min
, params
.cw_max
,
1210 params
.txop
, params
.uapsd
);
1212 sdata
->tx_conf
[queue
] = params
;
1213 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1214 wiphy_debug(local
->hw
.wiphy
,
1215 "failed to set TX queue parameters for queue %d\n",
1219 /* enable WMM or activate new settings */
1220 sdata
->vif
.bss_conf
.qos
= true;
1223 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1225 lockdep_assert_held(&sdata
->local
->mtx
);
1227 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1228 IEEE80211_STA_BEACON_POLL
);
1229 ieee80211_run_deferred_scan(sdata
->local
);
1232 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1234 mutex_lock(&sdata
->local
->mtx
);
1235 __ieee80211_stop_poll(sdata
);
1236 mutex_unlock(&sdata
->local
->mtx
);
1239 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1240 u16 capab
, bool erp_valid
, u8 erp
)
1242 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1244 bool use_protection
;
1245 bool use_short_preamble
;
1246 bool use_short_slot
;
1249 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1250 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1252 use_protection
= false;
1253 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1256 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1257 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1258 use_short_slot
= true;
1260 if (use_protection
!= bss_conf
->use_cts_prot
) {
1261 bss_conf
->use_cts_prot
= use_protection
;
1262 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1265 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1266 bss_conf
->use_short_preamble
= use_short_preamble
;
1267 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1270 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1271 bss_conf
->use_short_slot
= use_short_slot
;
1272 changed
|= BSS_CHANGED_ERP_SLOT
;
1278 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1279 struct cfg80211_bss
*cbss
,
1280 u32 bss_info_changed
)
1282 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1283 struct ieee80211_local
*local
= sdata
->local
;
1284 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1286 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1287 /* set timing information */
1288 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1289 bss_conf
->last_tsf
= cbss
->tsf
;
1291 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1292 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1293 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1295 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1296 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1298 sdata
->u
.mgd
.associated
= cbss
;
1299 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1301 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1303 /* just to be sure */
1304 ieee80211_stop_poll(sdata
);
1306 ieee80211_led_assoc(local
, 1);
1308 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1309 bss_conf
->dtim_period
= bss
->dtim_period
;
1311 bss_conf
->dtim_period
= 0;
1313 bss_conf
->assoc
= 1;
1315 /* Tell the driver to monitor connection quality (if supported) */
1316 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1317 bss_conf
->cqm_rssi_thold
)
1318 bss_info_changed
|= BSS_CHANGED_CQM
;
1320 /* Enable ARP filtering */
1321 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1322 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1323 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1326 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1328 mutex_lock(&local
->iflist_mtx
);
1329 ieee80211_recalc_ps(local
, -1);
1330 ieee80211_recalc_smps(local
);
1331 mutex_unlock(&local
->iflist_mtx
);
1333 netif_tx_start_all_queues(sdata
->dev
);
1334 netif_carrier_on(sdata
->dev
);
1337 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1338 u16 stype
, u16 reason
, bool tx
,
1341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1342 struct ieee80211_local
*local
= sdata
->local
;
1343 struct sta_info
*sta
;
1346 ASSERT_MGD_MTX(ifmgd
);
1348 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1351 if (WARN_ON(!ifmgd
->associated
))
1354 ieee80211_stop_poll(sdata
);
1356 ifmgd
->associated
= NULL
;
1359 * we need to commit the associated = NULL change because the
1360 * scan code uses that to determine whether this iface should
1361 * go to/wake up from powersave or not -- and could otherwise
1362 * wake the queues erroneously.
1367 * Thus, we can only afterwards stop the queues -- to account
1368 * for the case where another CPU is finishing a scan at this
1369 * time -- we don't want the scan code to enable queues.
1372 netif_tx_stop_all_queues(sdata
->dev
);
1373 netif_carrier_off(sdata
->dev
);
1375 mutex_lock(&local
->sta_mtx
);
1376 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1378 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1379 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1381 mutex_unlock(&local
->sta_mtx
);
1383 /* deauthenticate/disassociate now */
1384 if (tx
|| frame_buf
)
1385 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1386 reason
, tx
, frame_buf
);
1388 /* flush out frame */
1390 drv_flush(local
, false);
1392 /* clear bssid only after building the needed mgmt frames */
1393 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1395 /* remove AP and TDLS peers */
1396 sta_info_flush(local
, sdata
);
1398 /* finally reset all BSS / config parameters */
1399 changed
|= ieee80211_reset_erp_info(sdata
);
1401 ieee80211_led_assoc(local
, 0);
1402 changed
|= BSS_CHANGED_ASSOC
;
1403 sdata
->vif
.bss_conf
.assoc
= false;
1405 /* on the next assoc, re-program HT parameters */
1406 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1407 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1409 local
->power_constr_level
= 0;
1411 del_timer_sync(&local
->dynamic_ps_timer
);
1412 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1414 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1415 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1416 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1418 local
->ps_sdata
= NULL
;
1420 /* Disable ARP filtering */
1421 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1422 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1423 changed
|= BSS_CHANGED_ARP_FILTER
;
1426 sdata
->vif
.bss_conf
.qos
= false;
1427 changed
|= BSS_CHANGED_QOS
;
1429 /* The BSSID (not really interesting) and HT changed */
1430 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1431 ieee80211_bss_info_change_notify(sdata
, changed
);
1433 /* channel(_type) changes are handled by ieee80211_hw_config */
1434 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1435 ieee80211_hw_config(local
, 0);
1437 /* disassociated - set to defaults now */
1438 ieee80211_set_wmm_default(sdata
, false);
1440 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1441 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1442 del_timer_sync(&sdata
->u
.mgd
.timer
);
1443 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1446 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1447 struct ieee80211_hdr
*hdr
)
1450 * We can postpone the mgd.timer whenever receiving unicast frames
1451 * from AP because we know that the connection is working both ways
1452 * at that time. But multicast frames (and hence also beacons) must
1453 * be ignored here, because we need to trigger the timer during
1454 * data idle periods for sending the periodic probe request to the
1455 * AP we're connected to.
1457 if (is_multicast_ether_addr(hdr
->addr1
))
1460 ieee80211_sta_reset_conn_monitor(sdata
);
1463 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1465 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1466 struct ieee80211_local
*local
= sdata
->local
;
1468 mutex_lock(&local
->mtx
);
1469 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1470 IEEE80211_STA_CONNECTION_POLL
))) {
1471 mutex_unlock(&local
->mtx
);
1475 __ieee80211_stop_poll(sdata
);
1477 mutex_lock(&local
->iflist_mtx
);
1478 ieee80211_recalc_ps(local
, -1);
1479 mutex_unlock(&local
->iflist_mtx
);
1481 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1485 * We've received a probe response, but are not sure whether
1486 * we have or will be receiving any beacons or data, so let's
1487 * schedule the timers again, just in case.
1489 ieee80211_sta_reset_beacon_monitor(sdata
);
1491 mod_timer(&ifmgd
->conn_mon_timer
,
1492 round_jiffies_up(jiffies
+
1493 IEEE80211_CONNECTION_IDLE_TIME
));
1495 mutex_unlock(&local
->mtx
);
1498 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1499 struct ieee80211_hdr
*hdr
, bool ack
)
1501 if (!ieee80211_is_data(hdr
->frame_control
))
1505 ieee80211_sta_reset_conn_monitor(sdata
);
1507 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1508 sdata
->u
.mgd
.probe_send_count
> 0) {
1510 sdata
->u
.mgd
.probe_send_count
= 0;
1512 sdata
->u
.mgd
.nullfunc_failed
= true;
1513 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1517 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1519 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1521 u8
*dst
= ifmgd
->associated
->bssid
;
1522 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1525 * Try sending broadcast probe requests for the last three
1526 * probe requests after the first ones failed since some
1527 * buggy APs only support broadcast probe requests.
1529 if (ifmgd
->probe_send_count
>= unicast_limit
)
1533 * When the hardware reports an accurate Tx ACK status, it's
1534 * better to send a nullfunc frame instead of a probe request,
1535 * as it will kick us off the AP quickly if we aren't associated
1536 * anymore. The timeout will be reset if the frame is ACKed by
1539 ifmgd
->probe_send_count
++;
1541 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1542 ifmgd
->nullfunc_failed
= false;
1543 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1547 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1548 if (WARN_ON_ONCE(ssid
== NULL
))
1553 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1554 0, (u32
) -1, true, false);
1557 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1558 run_again(ifmgd
, ifmgd
->probe_timeout
);
1559 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1560 drv_flush(sdata
->local
, false);
1563 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1566 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1567 bool already
= false;
1569 if (!ieee80211_sdata_running(sdata
))
1572 mutex_lock(&ifmgd
->mtx
);
1574 if (!ifmgd
->associated
)
1577 mutex_lock(&sdata
->local
->mtx
);
1579 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1580 mutex_unlock(&sdata
->local
->mtx
);
1584 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1586 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1591 * The driver/our work has already reported this event or the
1592 * connection monitoring has kicked in and we have already sent
1593 * a probe request. Or maybe the AP died and the driver keeps
1594 * reporting until we disassociate...
1596 * In either case we have to ignore the current call to this
1597 * function (except for setting the correct probe reason bit)
1598 * because otherwise we would reset the timer every time and
1599 * never check whether we received a probe response!
1601 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1602 IEEE80211_STA_CONNECTION_POLL
))
1606 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1608 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1610 mutex_unlock(&sdata
->local
->mtx
);
1615 mutex_lock(&sdata
->local
->iflist_mtx
);
1616 ieee80211_recalc_ps(sdata
->local
, -1);
1617 mutex_unlock(&sdata
->local
->iflist_mtx
);
1619 ifmgd
->probe_send_count
= 0;
1620 ieee80211_mgd_probe_ap_send(sdata
);
1622 mutex_unlock(&ifmgd
->mtx
);
1625 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1626 struct ieee80211_vif
*vif
)
1628 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1629 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1630 struct sk_buff
*skb
;
1634 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1637 ASSERT_MGD_MTX(ifmgd
);
1639 if (!ifmgd
->associated
)
1642 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1643 if (WARN_ON_ONCE(ssid
== NULL
))
1648 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1649 (u32
) -1, ssid
+ 2, ssid_len
,
1654 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1656 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1658 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1659 struct ieee80211_local
*local
= sdata
->local
;
1661 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1663 mutex_lock(&ifmgd
->mtx
);
1664 if (!ifmgd
->associated
) {
1665 mutex_unlock(&ifmgd
->mtx
);
1669 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1671 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1672 sdata
->name
, bssid
);
1674 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1677 mutex_unlock(&ifmgd
->mtx
);
1680 * must be outside lock due to cfg80211,
1681 * but that's not a problem.
1683 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1685 mutex_lock(&local
->mtx
);
1686 ieee80211_recalc_idle(local
);
1687 mutex_unlock(&local
->mtx
);
1690 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1692 struct ieee80211_sub_if_data
*sdata
=
1693 container_of(work
, struct ieee80211_sub_if_data
,
1694 u
.mgd
.beacon_connection_loss_work
);
1695 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1696 struct sta_info
*sta
;
1698 if (ifmgd
->associated
) {
1700 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1702 sta
->beacon_loss_count
++;
1706 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1707 __ieee80211_connection_loss(sdata
);
1709 ieee80211_mgd_probe_ap(sdata
, true);
1712 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1714 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1715 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1717 trace_api_beacon_loss(sdata
);
1719 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1720 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1722 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1724 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1726 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1727 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1729 trace_api_connection_loss(sdata
);
1731 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1732 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1734 EXPORT_SYMBOL(ieee80211_connection_loss
);
1737 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1740 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1742 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1745 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1747 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1748 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1751 cfg80211_put_bss(auth_data
->bss
);
1753 sdata
->u
.mgd
.auth_data
= NULL
;
1756 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1757 struct ieee80211_mgmt
*mgmt
, size_t len
)
1759 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1761 struct ieee802_11_elems elems
;
1763 pos
= mgmt
->u
.auth
.variable
;
1764 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1765 if (!elems
.challenge
)
1767 auth_data
->expected_transaction
= 4;
1768 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1769 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1770 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1771 auth_data
->key
, auth_data
->key_len
,
1772 auth_data
->key_idx
);
1775 static enum rx_mgmt_action __must_check
1776 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1777 struct ieee80211_mgmt
*mgmt
, size_t len
)
1779 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1781 u16 auth_alg
, auth_transaction
, status_code
;
1782 struct sta_info
*sta
;
1784 lockdep_assert_held(&ifmgd
->mtx
);
1787 return RX_MGMT_NONE
;
1789 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1790 return RX_MGMT_NONE
;
1792 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1794 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1795 return RX_MGMT_NONE
;
1797 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1798 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1799 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1801 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1802 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1803 return RX_MGMT_NONE
;
1805 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1806 printk(KERN_DEBUG
"%s: %pM denied authentication (status %d)\n",
1807 sdata
->name
, mgmt
->sa
, status_code
);
1811 switch (ifmgd
->auth_data
->algorithm
) {
1812 case WLAN_AUTH_OPEN
:
1813 case WLAN_AUTH_LEAP
:
1816 case WLAN_AUTH_SHARED_KEY
:
1817 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1818 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1819 /* need another frame */
1820 return RX_MGMT_NONE
;
1824 WARN_ONCE(1, "invalid auth alg %d",
1825 ifmgd
->auth_data
->algorithm
);
1826 return RX_MGMT_NONE
;
1829 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->name
);
1831 ifmgd
->auth_data
->done
= true;
1832 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1833 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1835 /* move station state to auth */
1836 mutex_lock(&sdata
->local
->sta_mtx
);
1837 sta
= sta_info_get(sdata
, bssid
);
1839 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1842 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1843 printk(KERN_DEBUG
"%s: failed moving %pM to auth\n",
1844 sdata
->name
, bssid
);
1847 mutex_unlock(&sdata
->local
->sta_mtx
);
1849 return RX_MGMT_CFG80211_RX_AUTH
;
1851 mutex_unlock(&sdata
->local
->sta_mtx
);
1852 /* ignore frame -- wait for timeout */
1853 return RX_MGMT_NONE
;
1857 static enum rx_mgmt_action __must_check
1858 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1859 struct ieee80211_mgmt
*mgmt
, size_t len
)
1861 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1862 const u8
*bssid
= NULL
;
1865 lockdep_assert_held(&ifmgd
->mtx
);
1868 return RX_MGMT_NONE
;
1870 if (!ifmgd
->associated
||
1871 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1872 return RX_MGMT_NONE
;
1874 bssid
= ifmgd
->associated
->bssid
;
1876 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1878 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1879 sdata
->name
, bssid
, reason_code
);
1881 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1883 mutex_lock(&sdata
->local
->mtx
);
1884 ieee80211_recalc_idle(sdata
->local
);
1885 mutex_unlock(&sdata
->local
->mtx
);
1887 return RX_MGMT_CFG80211_DEAUTH
;
1891 static enum rx_mgmt_action __must_check
1892 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1893 struct ieee80211_mgmt
*mgmt
, size_t len
)
1895 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1898 lockdep_assert_held(&ifmgd
->mtx
);
1901 return RX_MGMT_NONE
;
1903 if (!ifmgd
->associated
||
1904 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1905 return RX_MGMT_NONE
;
1907 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1909 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1910 sdata
->name
, mgmt
->sa
, reason_code
);
1912 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1914 mutex_lock(&sdata
->local
->mtx
);
1915 ieee80211_recalc_idle(sdata
->local
);
1916 mutex_unlock(&sdata
->local
->mtx
);
1918 return RX_MGMT_CFG80211_DISASSOC
;
1921 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1922 u8
*supp_rates
, unsigned int supp_rates_len
,
1923 u32
*rates
, u32
*basic_rates
,
1924 bool *have_higher_than_11mbit
,
1925 int *min_rate
, int *min_rate_index
)
1929 for (i
= 0; i
< supp_rates_len
; i
++) {
1930 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1931 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1934 *have_higher_than_11mbit
= true;
1937 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1938 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1940 * Note: Even through the membership selector and the basic
1941 * rate flag share the same bit, they are not exactly
1944 if (!!(supp_rates
[i
] & 0x80) &&
1945 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1948 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1949 if (sband
->bitrates
[j
].bitrate
== rate
) {
1952 *basic_rates
|= BIT(j
);
1953 if (rate
< *min_rate
) {
1955 *min_rate_index
= j
;
1963 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1966 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1968 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1971 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1973 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1974 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1978 sdata
->u
.mgd
.assoc_data
= NULL
;
1981 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1982 struct cfg80211_bss
*cbss
,
1983 struct ieee80211_mgmt
*mgmt
, size_t len
)
1985 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1986 struct ieee80211_local
*local
= sdata
->local
;
1987 struct ieee80211_supported_band
*sband
;
1988 struct sta_info
*sta
;
1990 u16 capab_info
, aid
;
1991 struct ieee802_11_elems elems
;
1992 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1996 /* AssocResp and ReassocResp have identical structure */
1998 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1999 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2001 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2003 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2005 aid
&= ~(BIT(15) | BIT(14));
2007 ifmgd
->broken_ap
= false;
2009 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2011 "%s: invalid AID value %d (out of range), turn off PS\n",
2014 ifmgd
->broken_ap
= true;
2017 pos
= mgmt
->u
.assoc_resp
.variable
;
2018 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2020 if (!elems
.supp_rates
) {
2021 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
2028 mutex_lock(&sdata
->local
->sta_mtx
);
2030 * station info was already allocated and inserted before
2031 * the association and should be available to us
2033 sta
= sta_info_get(sdata
, cbss
->bssid
);
2034 if (WARN_ON(!sta
)) {
2035 mutex_unlock(&sdata
->local
->sta_mtx
);
2039 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2041 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2042 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2043 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2045 sta
->supports_40mhz
=
2046 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2048 rate_control_rate_init(sta
);
2050 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2051 set_sta_flag(sta
, WLAN_STA_MFP
);
2053 if (elems
.wmm_param
)
2054 set_sta_flag(sta
, WLAN_STA_WME
);
2056 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2058 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2059 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2060 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2063 "%s: failed to move station %pM to desired state\n",
2064 sdata
->name
, sta
->sta
.addr
);
2065 WARN_ON(__sta_info_destroy(sta
));
2066 mutex_unlock(&sdata
->local
->sta_mtx
);
2070 mutex_unlock(&sdata
->local
->sta_mtx
);
2073 * Always handle WMM once after association regardless
2074 * of the first value the AP uses. Setting -1 here has
2075 * that effect because the AP values is an unsigned
2078 ifmgd
->wmm_last_param_set
= -1;
2080 if (elems
.wmm_param
)
2081 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2082 elems
.wmm_param_len
);
2084 ieee80211_set_wmm_default(sdata
, false);
2085 changed
|= BSS_CHANGED_QOS
;
2087 if (elems
.ht_operation
&& elems
.wmm_param
&&
2088 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2089 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2090 cbss
->bssid
, false);
2092 /* set AID and assoc capability,
2093 * ieee80211_set_associated() will tell the driver */
2094 bss_conf
->aid
= aid
;
2095 bss_conf
->assoc_capability
= capab_info
;
2096 ieee80211_set_associated(sdata
, cbss
, changed
);
2099 * If we're using 4-addr mode, let the AP know that we're
2100 * doing so, so that it can create the STA VLAN on its side
2102 if (ifmgd
->use_4addr
)
2103 ieee80211_send_4addr_nullfunc(local
, sdata
);
2106 * Start timer to probe the connection to the AP now.
2107 * Also start the timer that will detect beacon loss.
2109 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2110 ieee80211_sta_reset_beacon_monitor(sdata
);
2115 static enum rx_mgmt_action __must_check
2116 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2117 struct ieee80211_mgmt
*mgmt
, size_t len
,
2118 struct cfg80211_bss
**bss
)
2120 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2121 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2122 u16 capab_info
, status_code
, aid
;
2123 struct ieee802_11_elems elems
;
2127 lockdep_assert_held(&ifmgd
->mtx
);
2130 return RX_MGMT_NONE
;
2131 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2132 return RX_MGMT_NONE
;
2135 * AssocResp and ReassocResp have identical structure, so process both
2136 * of them in this function.
2140 return RX_MGMT_NONE
;
2142 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2143 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2144 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2145 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2147 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
2148 "status=%d aid=%d)\n",
2149 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2150 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2152 pos
= mgmt
->u
.assoc_resp
.variable
;
2153 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2155 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2156 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2157 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2159 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2160 ms
= tu
* 1024 / 1000;
2161 printk(KERN_DEBUG
"%s: %pM rejected association temporarily; "
2162 "comeback duration %u TU (%u ms)\n",
2163 sdata
->name
, mgmt
->sa
, tu
, ms
);
2164 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2165 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2166 run_again(ifmgd
, assoc_data
->timeout
);
2167 return RX_MGMT_NONE
;
2170 *bss
= assoc_data
->bss
;
2172 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2173 printk(KERN_DEBUG
"%s: %pM denied association (code=%d)\n",
2174 sdata
->name
, mgmt
->sa
, status_code
);
2175 ieee80211_destroy_assoc_data(sdata
, false);
2177 printk(KERN_DEBUG
"%s: associated\n", sdata
->name
);
2179 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2180 /* oops -- internal error -- send timeout for now */
2181 ieee80211_destroy_assoc_data(sdata
, true);
2182 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2183 cfg80211_put_bss(*bss
);
2184 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2188 * destroy assoc_data afterwards, as otherwise an idle
2189 * recalc after assoc_data is NULL but before associated
2190 * is set can cause the interface to go idle
2192 ieee80211_destroy_assoc_data(sdata
, true);
2195 return RX_MGMT_CFG80211_RX_ASSOC
;
2197 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2198 struct ieee80211_mgmt
*mgmt
,
2200 struct ieee80211_rx_status
*rx_status
,
2201 struct ieee802_11_elems
*elems
,
2204 struct ieee80211_local
*local
= sdata
->local
;
2206 struct ieee80211_bss
*bss
;
2207 struct ieee80211_channel
*channel
;
2208 bool need_ps
= false;
2210 if (sdata
->u
.mgd
.associated
&&
2211 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2212 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2213 /* not previously set so we may need to recalc */
2214 need_ps
= !bss
->dtim_period
;
2217 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2218 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2221 freq
= rx_status
->freq
;
2223 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2225 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2228 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2231 ieee80211_rx_bss_put(local
, bss
);
2233 if (!sdata
->u
.mgd
.associated
)
2237 mutex_lock(&local
->iflist_mtx
);
2238 ieee80211_recalc_ps(local
, -1);
2239 mutex_unlock(&local
->iflist_mtx
);
2242 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2243 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2245 struct ieee80211_channel_sw_ie
*sw_elem
=
2246 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2247 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2248 bss
, rx_status
->mactime
);
2253 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2254 struct sk_buff
*skb
)
2256 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2257 struct ieee80211_if_managed
*ifmgd
;
2258 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2259 size_t baselen
, len
= skb
->len
;
2260 struct ieee802_11_elems elems
;
2262 ifmgd
= &sdata
->u
.mgd
;
2264 ASSERT_MGD_MTX(ifmgd
);
2266 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2267 return; /* ignore ProbeResp to foreign address */
2269 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2273 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2276 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2278 if (ifmgd
->associated
&&
2279 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2280 ieee80211_reset_ap_probe(sdata
);
2282 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2283 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2284 /* got probe response, continue with auth */
2285 printk(KERN_DEBUG
"%s: direct probe responded\n", sdata
->name
);
2286 ifmgd
->auth_data
->tries
= 0;
2287 ifmgd
->auth_data
->timeout
= jiffies
;
2288 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2293 * This is the canonical list of information elements we care about,
2294 * the filter code also gives us all changes to the Microsoft OUI
2295 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2297 * We implement beacon filtering in software since that means we can
2298 * avoid processing the frame here and in cfg80211, and userspace
2299 * will not be able to tell whether the hardware supports it or not.
2301 * XXX: This list needs to be dynamic -- userspace needs to be able to
2302 * add items it requires. It also needs to be able to tell us to
2303 * look out for other vendor IEs.
2305 static const u64 care_about_ies
=
2306 (1ULL << WLAN_EID_COUNTRY
) |
2307 (1ULL << WLAN_EID_ERP_INFO
) |
2308 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2309 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2310 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2311 (1ULL << WLAN_EID_HT_OPERATION
);
2313 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2314 struct ieee80211_mgmt
*mgmt
,
2316 struct ieee80211_rx_status
*rx_status
)
2318 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2319 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2321 struct ieee802_11_elems elems
;
2322 struct ieee80211_local
*local
= sdata
->local
;
2324 bool erp_valid
, directed_tim
= false;
2329 lockdep_assert_held(&ifmgd
->mtx
);
2331 /* Process beacon from the current BSS */
2332 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2336 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2339 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2340 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2341 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2342 len
- baselen
, &elems
);
2344 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2346 ifmgd
->assoc_data
->have_beacon
= true;
2347 ifmgd
->assoc_data
->sent_assoc
= false;
2348 /* continue assoc process */
2349 ifmgd
->assoc_data
->timeout
= jiffies
;
2350 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2354 if (!ifmgd
->associated
||
2355 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2357 bssid
= ifmgd
->associated
->bssid
;
2359 /* Track average RSSI from the Beacon frames of the current AP */
2360 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2361 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2362 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2363 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2364 ifmgd
->last_cqm_event_signal
= 0;
2365 ifmgd
->count_beacon_signal
= 1;
2366 ifmgd
->last_ave_beacon_signal
= 0;
2368 ifmgd
->ave_beacon_signal
=
2369 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2370 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2371 ifmgd
->ave_beacon_signal
) / 16;
2372 ifmgd
->count_beacon_signal
++;
2375 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2376 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2377 int sig
= ifmgd
->ave_beacon_signal
;
2378 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2381 * if signal crosses either of the boundaries, invoke callback
2382 * with appropriate parameters
2384 if (sig
> ifmgd
->rssi_max_thold
&&
2385 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2386 ifmgd
->last_ave_beacon_signal
= sig
;
2387 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2388 } else if (sig
< ifmgd
->rssi_min_thold
&&
2389 (last_sig
>= ifmgd
->rssi_max_thold
||
2391 ifmgd
->last_ave_beacon_signal
= sig
;
2392 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2396 if (bss_conf
->cqm_rssi_thold
&&
2397 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2398 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2399 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2400 int last_event
= ifmgd
->last_cqm_event_signal
;
2401 int thold
= bss_conf
->cqm_rssi_thold
;
2402 int hyst
= bss_conf
->cqm_rssi_hyst
;
2404 (last_event
== 0 || sig
< last_event
- hyst
)) {
2405 ifmgd
->last_cqm_event_signal
= sig
;
2406 ieee80211_cqm_rssi_notify(
2408 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2410 } else if (sig
> thold
&&
2411 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2412 ifmgd
->last_cqm_event_signal
= sig
;
2413 ieee80211_cqm_rssi_notify(
2415 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2420 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2421 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2422 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2425 mutex_lock(&local
->mtx
);
2426 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2427 ieee80211_run_deferred_scan(local
);
2428 mutex_unlock(&local
->mtx
);
2430 mutex_lock(&local
->iflist_mtx
);
2431 ieee80211_recalc_ps(local
, -1);
2432 mutex_unlock(&local
->iflist_mtx
);
2436 * Push the beacon loss detection into the future since
2437 * we are processing a beacon from the AP just now.
2439 ieee80211_sta_reset_beacon_monitor(sdata
);
2441 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2442 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2443 len
- baselen
, &elems
,
2444 care_about_ies
, ncrc
);
2446 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2447 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2450 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2451 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2454 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2455 elems
.wmm_param_len
);
2458 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2460 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2461 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2462 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2463 ieee80211_hw_config(local
,
2464 IEEE80211_CONF_CHANGE_PS
);
2466 ieee80211_send_nullfunc(local
, sdata
, 0);
2467 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2468 local
->pspolling
= true;
2471 * Here is assumed that the driver will be
2472 * able to send ps-poll frame and receive a
2473 * response even though power save mode is
2474 * enabled, but some drivers might require
2475 * to disable power save here. This needs
2476 * to be investigated.
2478 ieee80211_send_pspoll(local
, sdata
);
2483 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2485 ifmgd
->beacon_crc
= ncrc
;
2486 ifmgd
->beacon_crc_valid
= true;
2488 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2490 erp_value
= elems
.erp_info
[0];
2494 changed
|= ieee80211_handle_bss_capability(sdata
,
2495 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2496 erp_valid
, erp_value
);
2499 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2500 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2501 struct ieee80211_supported_band
*sband
;
2503 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2505 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2509 /* Note: country IE parsing is done for us by cfg80211 */
2510 if (elems
.country_elem
) {
2511 /* TODO: IBSS also needs this */
2512 if (elems
.pwr_constr_elem
)
2513 ieee80211_handle_pwr_constr(sdata
,
2514 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2515 elems
.pwr_constr_elem
,
2516 elems
.pwr_constr_elem_len
);
2519 ieee80211_bss_info_change_notify(sdata
, changed
);
2522 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2523 struct sk_buff
*skb
)
2525 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2526 struct ieee80211_rx_status
*rx_status
;
2527 struct ieee80211_mgmt
*mgmt
;
2528 struct cfg80211_bss
*bss
= NULL
;
2529 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2532 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2533 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2534 fc
= le16_to_cpu(mgmt
->frame_control
);
2536 mutex_lock(&ifmgd
->mtx
);
2538 switch (fc
& IEEE80211_FCTL_STYPE
) {
2539 case IEEE80211_STYPE_BEACON
:
2540 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2542 case IEEE80211_STYPE_PROBE_RESP
:
2543 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2545 case IEEE80211_STYPE_AUTH
:
2546 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2548 case IEEE80211_STYPE_DEAUTH
:
2549 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2551 case IEEE80211_STYPE_DISASSOC
:
2552 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2554 case IEEE80211_STYPE_ASSOC_RESP
:
2555 case IEEE80211_STYPE_REASSOC_RESP
:
2556 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2558 case IEEE80211_STYPE_ACTION
:
2559 switch (mgmt
->u
.action
.category
) {
2560 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2561 ieee80211_sta_process_chanswitch(sdata
,
2562 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2563 (void *)ifmgd
->associated
->priv
,
2564 rx_status
->mactime
);
2568 mutex_unlock(&ifmgd
->mtx
);
2574 case RX_MGMT_CFG80211_DEAUTH
:
2575 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2577 case RX_MGMT_CFG80211_DISASSOC
:
2578 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2580 case RX_MGMT_CFG80211_RX_AUTH
:
2581 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2583 case RX_MGMT_CFG80211_RX_ASSOC
:
2584 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2586 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2587 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2590 WARN(1, "unexpected: %d", rma
);
2594 static void ieee80211_sta_timer(unsigned long data
)
2596 struct ieee80211_sub_if_data
*sdata
=
2597 (struct ieee80211_sub_if_data
*) data
;
2598 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2599 struct ieee80211_local
*local
= sdata
->local
;
2601 if (local
->quiescing
) {
2602 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2606 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2609 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2610 u8
*bssid
, u8 reason
)
2612 struct ieee80211_local
*local
= sdata
->local
;
2613 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2614 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2616 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2618 mutex_unlock(&ifmgd
->mtx
);
2621 * must be outside lock due to cfg80211,
2622 * but that's not a problem.
2624 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2626 mutex_lock(&local
->mtx
);
2627 ieee80211_recalc_idle(local
);
2628 mutex_unlock(&local
->mtx
);
2630 mutex_lock(&ifmgd
->mtx
);
2633 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2635 struct ieee80211_local
*local
= sdata
->local
;
2636 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2637 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2639 lockdep_assert_held(&ifmgd
->mtx
);
2641 if (WARN_ON_ONCE(!auth_data
))
2646 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2647 printk(KERN_DEBUG
"%s: authentication with %pM timed out\n",
2648 sdata
->name
, auth_data
->bss
->bssid
);
2651 * Most likely AP is not in the range so remove the
2652 * bss struct for that AP.
2654 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2659 if (auth_data
->bss
->proberesp_ies
) {
2660 printk(KERN_DEBUG
"%s: send auth to %pM (try %d/%d)\n",
2661 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2662 IEEE80211_AUTH_MAX_TRIES
);
2664 auth_data
->expected_transaction
= 2;
2665 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2666 auth_data
->ie
, auth_data
->ie_len
,
2667 auth_data
->bss
->bssid
,
2668 auth_data
->bss
->bssid
, NULL
, 0, 0);
2672 printk(KERN_DEBUG
"%s: direct probe to %pM (try %d/%i)\n",
2673 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2674 IEEE80211_AUTH_MAX_TRIES
);
2676 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2680 * Direct probe is sent to broadcast address as some APs
2681 * will not answer to direct packet in unassociated state.
2683 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2684 NULL
, 0, (u32
) -1, true, false);
2687 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2688 run_again(ifmgd
, auth_data
->timeout
);
2693 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2695 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2696 struct ieee80211_local
*local
= sdata
->local
;
2698 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2700 assoc_data
->tries
++;
2701 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2702 printk(KERN_DEBUG
"%s: association with %pM timed out\n",
2703 sdata
->name
, assoc_data
->bss
->bssid
);
2706 * Most likely AP is not in the range so remove the
2707 * bss struct for that AP.
2709 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2714 printk(KERN_DEBUG
"%s: associate with %pM (try %d/%d)\n",
2715 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2716 IEEE80211_ASSOC_MAX_TRIES
);
2717 ieee80211_send_assoc(sdata
);
2719 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2720 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2725 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2727 struct ieee80211_local
*local
= sdata
->local
;
2728 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2730 mutex_lock(&ifmgd
->mtx
);
2732 if (ifmgd
->auth_data
&&
2733 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2734 if (ifmgd
->auth_data
->done
) {
2736 * ok ... we waited for assoc but userspace didn't,
2737 * so let's just kill the auth data
2739 ieee80211_destroy_auth_data(sdata
, false);
2740 } else if (ieee80211_probe_auth(sdata
)) {
2743 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2745 ieee80211_destroy_auth_data(sdata
, false);
2747 mutex_unlock(&ifmgd
->mtx
);
2748 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2749 mutex_lock(&ifmgd
->mtx
);
2751 } else if (ifmgd
->auth_data
)
2752 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2754 if (ifmgd
->assoc_data
&&
2755 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2756 if (!ifmgd
->assoc_data
->have_beacon
||
2757 ieee80211_do_assoc(sdata
)) {
2760 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2762 ieee80211_destroy_assoc_data(sdata
, false);
2764 mutex_unlock(&ifmgd
->mtx
);
2765 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2766 mutex_lock(&ifmgd
->mtx
);
2768 } else if (ifmgd
->assoc_data
)
2769 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2771 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2772 IEEE80211_STA_CONNECTION_POLL
) &&
2773 ifmgd
->associated
) {
2777 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2779 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2780 max_tries
= max_nullfunc_tries
;
2782 max_tries
= max_probe_tries
;
2784 /* ACK received for nullfunc probing frame */
2785 if (!ifmgd
->probe_send_count
)
2786 ieee80211_reset_ap_probe(sdata
);
2787 else if (ifmgd
->nullfunc_failed
) {
2788 if (ifmgd
->probe_send_count
< max_tries
) {
2789 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2790 wiphy_debug(local
->hw
.wiphy
,
2791 "%s: No ack for nullfunc frame to"
2792 " AP %pM, try %d/%i\n",
2794 ifmgd
->probe_send_count
, max_tries
);
2796 ieee80211_mgd_probe_ap_send(sdata
);
2798 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2799 wiphy_debug(local
->hw
.wiphy
,
2800 "%s: No ack for nullfunc frame to"
2801 " AP %pM, disconnecting.\n",
2802 sdata
->name
, bssid
);
2804 ieee80211_sta_connection_lost(sdata
, bssid
,
2805 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2807 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2808 run_again(ifmgd
, ifmgd
->probe_timeout
);
2809 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2810 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2811 wiphy_debug(local
->hw
.wiphy
,
2812 "%s: Failed to send nullfunc to AP %pM"
2813 " after %dms, disconnecting.\n",
2815 bssid
, probe_wait_ms
);
2817 ieee80211_sta_connection_lost(sdata
, bssid
,
2818 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2819 } else if (ifmgd
->probe_send_count
< max_tries
) {
2820 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2821 wiphy_debug(local
->hw
.wiphy
,
2822 "%s: No probe response from AP %pM"
2823 " after %dms, try %d/%i\n",
2825 bssid
, probe_wait_ms
,
2826 ifmgd
->probe_send_count
, max_tries
);
2828 ieee80211_mgd_probe_ap_send(sdata
);
2831 * We actually lost the connection ... or did we?
2834 wiphy_debug(local
->hw
.wiphy
,
2835 "%s: No probe response from AP %pM"
2836 " after %dms, disconnecting.\n",
2838 bssid
, probe_wait_ms
);
2840 ieee80211_sta_connection_lost(sdata
, bssid
,
2841 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2845 mutex_unlock(&ifmgd
->mtx
);
2847 mutex_lock(&local
->mtx
);
2848 ieee80211_recalc_idle(local
);
2849 mutex_unlock(&local
->mtx
);
2852 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2854 struct ieee80211_sub_if_data
*sdata
=
2855 (struct ieee80211_sub_if_data
*) data
;
2856 struct ieee80211_local
*local
= sdata
->local
;
2858 if (local
->quiescing
)
2861 ieee80211_queue_work(&sdata
->local
->hw
,
2862 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2865 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2867 struct ieee80211_sub_if_data
*sdata
=
2868 (struct ieee80211_sub_if_data
*) data
;
2869 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2870 struct ieee80211_local
*local
= sdata
->local
;
2872 if (local
->quiescing
)
2875 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2878 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2880 struct ieee80211_sub_if_data
*sdata
=
2881 container_of(work
, struct ieee80211_sub_if_data
,
2882 u
.mgd
.monitor_work
);
2884 ieee80211_mgd_probe_ap(sdata
, false);
2887 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2891 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2892 __ieee80211_stop_poll(sdata
);
2894 /* let's probe the connection once */
2895 flags
= sdata
->local
->hw
.flags
;
2896 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2897 ieee80211_queue_work(&sdata
->local
->hw
,
2898 &sdata
->u
.mgd
.monitor_work
);
2899 /* and do all the other regular work too */
2900 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2905 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2907 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2910 * we need to use atomic bitops for the running bits
2911 * only because both timers might fire at the same
2912 * time -- the code here is properly synchronised.
2915 cancel_work_sync(&ifmgd
->request_smps_work
);
2917 cancel_work_sync(&ifmgd
->monitor_work
);
2918 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2919 if (del_timer_sync(&ifmgd
->timer
))
2920 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2922 cancel_work_sync(&ifmgd
->chswitch_work
);
2923 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2924 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2926 /* these will just be re-established on connection */
2927 del_timer_sync(&ifmgd
->conn_mon_timer
);
2928 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2931 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2933 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2935 if (!ifmgd
->associated
)
2938 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2939 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2940 mutex_lock(&ifmgd
->mtx
);
2941 if (ifmgd
->associated
) {
2942 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2943 wiphy_debug(sdata
->local
->hw
.wiphy
,
2944 "%s: driver requested disconnect after resume.\n",
2947 ieee80211_sta_connection_lost(sdata
,
2948 ifmgd
->associated
->bssid
,
2949 WLAN_REASON_UNSPECIFIED
);
2950 mutex_unlock(&ifmgd
->mtx
);
2953 mutex_unlock(&ifmgd
->mtx
);
2956 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2957 add_timer(&ifmgd
->timer
);
2958 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2959 add_timer(&ifmgd
->chswitch_timer
);
2960 ieee80211_sta_reset_beacon_monitor(sdata
);
2962 mutex_lock(&sdata
->local
->mtx
);
2963 ieee80211_restart_sta_timer(sdata
);
2964 mutex_unlock(&sdata
->local
->mtx
);
2968 /* interface setup */
2969 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2971 struct ieee80211_if_managed
*ifmgd
;
2973 ifmgd
= &sdata
->u
.mgd
;
2974 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2975 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2976 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2977 ieee80211_beacon_connection_loss_work
);
2978 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2979 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2980 (unsigned long) sdata
);
2981 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2982 (unsigned long) sdata
);
2983 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2984 (unsigned long) sdata
);
2985 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2986 (unsigned long) sdata
);
2989 ifmgd
->powersave
= sdata
->wdev
.ps
;
2990 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2991 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2993 mutex_init(&ifmgd
->mtx
);
2995 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2996 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2998 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3001 /* scan finished notification */
3002 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3004 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
3006 /* Restart STA timers */
3008 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3009 ieee80211_restart_sta_timer(sdata
);
3013 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3014 unsigned long data
, void *dummy
)
3016 s32 latency_usec
= (s32
) data
;
3017 struct ieee80211_local
*local
=
3018 container_of(nb
, struct ieee80211_local
,
3019 network_latency_notifier
);
3021 mutex_lock(&local
->iflist_mtx
);
3022 ieee80211_recalc_ps(local
, latency_usec
);
3023 mutex_unlock(&local
->iflist_mtx
);
3028 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3029 struct cfg80211_bss
*cbss
, bool assoc
)
3031 struct ieee80211_local
*local
= sdata
->local
;
3032 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3033 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3034 struct sta_info
*sta
;
3035 bool have_sta
= false;
3038 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3039 const u8
*ht_oper_ie
;
3040 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3041 struct ieee80211_supported_band
*sband
;
3043 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3048 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3053 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3058 mutex_lock(&local
->mtx
);
3059 ieee80211_recalc_idle(sdata
->local
);
3060 mutex_unlock(&local
->mtx
);
3062 /* switch to the right channel */
3063 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3065 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3067 if (sband
->ht_cap
.ht_supported
) {
3068 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3069 cbss
->information_elements
,
3070 cbss
->len_information_elements
);
3071 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3072 ht_oper
= (void *)(ht_oper_ie
+ 2);
3076 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3077 cbss
->channel
->band
);
3078 /* check that channel matches the right operating channel */
3079 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3081 * It's possible that some APs are confused here;
3082 * Netgear WNDR3700 sometimes reports 4 higher than
3083 * the actual channel in association responses, but
3084 * since we look at probe response/beacon data here
3088 "%s: Wrong control channel: center-freq: %d"
3089 " ht-cfreq: %d ht->primary_chan: %d"
3090 " band: %d. Disabling HT.\n",
3091 sdata
->name
, cbss
->channel
->center_freq
,
3092 ht_cfreq
, ht_oper
->primary_chan
,
3093 cbss
->channel
->band
);
3099 channel_type
= NL80211_CHAN_HT20
;
3101 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3102 switch (ht_oper
->ht_param
&
3103 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3104 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3105 channel_type
= NL80211_CHAN_HT40PLUS
;
3107 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3108 channel_type
= NL80211_CHAN_HT40MINUS
;
3114 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3115 /* can only fail due to HT40+/- mismatch */
3116 channel_type
= NL80211_CHAN_HT20
;
3118 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3120 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3121 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3125 local
->oper_channel
= cbss
->channel
;
3126 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3129 u32 rates
= 0, basic_rates
= 0;
3130 bool have_higher_than_11mbit
;
3131 int min_rate
= INT_MAX
, min_rate_index
= -1;
3133 ieee80211_get_rates(sband
, bss
->supp_rates
,
3134 bss
->supp_rates_len
,
3135 &rates
, &basic_rates
,
3136 &have_higher_than_11mbit
,
3137 &min_rate
, &min_rate_index
);
3140 * This used to be a workaround for basic rates missing
3141 * in the association response frame. Now that we no
3142 * longer use the basic rates from there, it probably
3143 * doesn't happen any more, but keep the workaround so
3144 * in case some *other* APs are buggy in different ways
3145 * we can connect -- with a warning.
3147 if (!basic_rates
&& min_rate_index
>= 0) {
3149 "%s: No basic rates, using min rate instead.\n",
3151 basic_rates
= BIT(min_rate_index
);
3154 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3155 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3157 /* cf. IEEE 802.11 9.2.12 */
3158 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3159 have_higher_than_11mbit
)
3160 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3162 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3164 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3166 /* tell driver about BSSID and basic rates */
3167 ieee80211_bss_info_change_notify(sdata
,
3168 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3171 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3173 err
= sta_info_insert(sta
);
3177 "%s: failed to insert STA entry for the AP (error %d)\n",
3182 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3188 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3189 struct cfg80211_auth_request
*req
)
3191 struct ieee80211_local
*local
= sdata
->local
;
3192 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3193 struct ieee80211_mgd_auth_data
*auth_data
;
3197 /* prepare auth data structure */
3199 switch (req
->auth_type
) {
3200 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3201 auth_alg
= WLAN_AUTH_OPEN
;
3203 case NL80211_AUTHTYPE_SHARED_KEY
:
3204 if (IS_ERR(local
->wep_tx_tfm
))
3206 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3208 case NL80211_AUTHTYPE_FT
:
3209 auth_alg
= WLAN_AUTH_FT
;
3211 case NL80211_AUTHTYPE_NETWORK_EAP
:
3212 auth_alg
= WLAN_AUTH_LEAP
;
3218 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3222 auth_data
->bss
= req
->bss
;
3224 if (req
->ie
&& req
->ie_len
) {
3225 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3226 auth_data
->ie_len
= req
->ie_len
;
3229 if (req
->key
&& req
->key_len
) {
3230 auth_data
->key_len
= req
->key_len
;
3231 auth_data
->key_idx
= req
->key_idx
;
3232 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3235 auth_data
->algorithm
= auth_alg
;
3237 /* try to authenticate/probe */
3239 mutex_lock(&ifmgd
->mtx
);
3241 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3242 ifmgd
->assoc_data
) {
3247 if (ifmgd
->auth_data
)
3248 ieee80211_destroy_auth_data(sdata
, false);
3250 /* prep auth_data so we don't go into idle on disassoc */
3251 ifmgd
->auth_data
= auth_data
;
3253 if (ifmgd
->associated
)
3254 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3256 printk(KERN_DEBUG
"%s: authenticate with %pM\n",
3257 sdata
->name
, req
->bss
->bssid
);
3259 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3263 err
= ieee80211_probe_auth(sdata
);
3265 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3269 /* hold our own reference */
3270 cfg80211_ref_bss(auth_data
->bss
);
3275 ifmgd
->auth_data
= NULL
;
3279 mutex_unlock(&ifmgd
->mtx
);
3284 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3285 struct cfg80211_assoc_request
*req
)
3287 struct ieee80211_local
*local
= sdata
->local
;
3288 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3289 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3290 struct ieee80211_mgd_assoc_data
*assoc_data
;
3291 struct ieee80211_supported_band
*sband
;
3295 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3299 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3303 mutex_lock(&ifmgd
->mtx
);
3305 if (ifmgd
->associated
)
3306 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3308 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3313 if (ifmgd
->assoc_data
) {
3318 if (ifmgd
->auth_data
) {
3321 /* keep sta info, bssid if matching */
3322 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3323 ieee80211_destroy_auth_data(sdata
, match
);
3326 /* prepare assoc data */
3328 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3329 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3331 ifmgd
->beacon_crc_valid
= false;
3334 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3335 * We still associate in non-HT mode (11a/b/g) if any one of these
3336 * ciphers is configured as pairwise.
3337 * We can set this to true for non-11n hardware, that'll be checked
3338 * separately along with the peer capabilities.
3340 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
3341 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3342 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3343 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
3344 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3346 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3347 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3349 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3350 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3351 if (!sband
->ht_cap
.ht_supported
||
3352 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
)
3353 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3355 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3356 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3357 sizeof(ifmgd
->ht_capa_mask
));
3359 if (req
->ie
&& req
->ie_len
) {
3360 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3361 assoc_data
->ie_len
= req
->ie_len
;
3364 assoc_data
->bss
= req
->bss
;
3366 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3367 if (ifmgd
->powersave
)
3368 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3370 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3372 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3374 assoc_data
->capability
= req
->bss
->capability
;
3375 assoc_data
->wmm
= bss
->wmm_used
&&
3376 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3377 assoc_data
->supp_rates
= bss
->supp_rates
;
3378 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3379 assoc_data
->ht_operation_ie
=
3380 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3382 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3383 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3384 assoc_data
->uapsd
= true;
3385 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3387 assoc_data
->uapsd
= false;
3388 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3391 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3392 assoc_data
->ssid_len
= ssidie
[1];
3394 if (req
->prev_bssid
)
3395 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3398 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3399 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3401 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3402 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3405 if (req
->crypto
.control_port
)
3406 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3408 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3410 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3411 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3413 /* kick off associate process */
3415 ifmgd
->assoc_data
= assoc_data
;
3417 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3421 if (!bss
->dtim_period
&&
3422 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3424 * Wait up to one beacon interval ...
3425 * should this be more if we miss one?
3427 printk(KERN_DEBUG
"%s: waiting for beacon from %pM\n",
3428 sdata
->name
, ifmgd
->bssid
);
3429 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3431 assoc_data
->have_beacon
= true;
3432 assoc_data
->sent_assoc
= false;
3433 assoc_data
->timeout
= jiffies
;
3435 run_again(ifmgd
, assoc_data
->timeout
);
3437 if (bss
->corrupt_data
) {
3438 char *corrupt_type
= "data";
3439 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3440 if (bss
->corrupt_data
&
3441 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3442 corrupt_type
= "beacon and probe response";
3444 corrupt_type
= "beacon";
3445 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3446 corrupt_type
= "probe response";
3447 printk(KERN_DEBUG
"%s: associating with AP with corrupt %s\n",
3448 sdata
->name
, corrupt_type
);
3454 ifmgd
->assoc_data
= NULL
;
3458 mutex_unlock(&ifmgd
->mtx
);
3463 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3464 struct cfg80211_deauth_request
*req
)
3466 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3467 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3469 mutex_lock(&ifmgd
->mtx
);
3471 if (ifmgd
->auth_data
) {
3472 ieee80211_destroy_auth_data(sdata
, false);
3473 mutex_unlock(&ifmgd
->mtx
);
3478 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3479 sdata
->name
, req
->bssid
, req
->reason_code
);
3481 if (ifmgd
->associated
&&
3482 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3483 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3484 req
->reason_code
, true, frame_buf
);
3486 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3487 IEEE80211_STYPE_DEAUTH
,
3488 req
->reason_code
, true,
3490 mutex_unlock(&ifmgd
->mtx
);
3492 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3494 mutex_lock(&sdata
->local
->mtx
);
3495 ieee80211_recalc_idle(sdata
->local
);
3496 mutex_unlock(&sdata
->local
->mtx
);
3501 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3502 struct cfg80211_disassoc_request
*req
)
3504 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3506 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3508 mutex_lock(&ifmgd
->mtx
);
3511 * cfg80211 should catch this ... but it's racy since
3512 * we can receive a disassoc frame, process it, hand it
3513 * to cfg80211 while that's in a locked section already
3514 * trying to tell us that the user wants to disconnect.
3516 if (ifmgd
->associated
!= req
->bss
) {
3517 mutex_unlock(&ifmgd
->mtx
);
3521 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
3522 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3524 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3525 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3526 req
->reason_code
, !req
->local_state_change
,
3528 mutex_unlock(&ifmgd
->mtx
);
3530 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3532 mutex_lock(&sdata
->local
->mtx
);
3533 ieee80211_recalc_idle(sdata
->local
);
3534 mutex_unlock(&sdata
->local
->mtx
);
3539 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3541 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3543 mutex_lock(&ifmgd
->mtx
);
3544 if (ifmgd
->assoc_data
)
3545 ieee80211_destroy_assoc_data(sdata
, false);
3546 if (ifmgd
->auth_data
)
3547 ieee80211_destroy_auth_data(sdata
, false);
3548 del_timer_sync(&ifmgd
->timer
);
3549 mutex_unlock(&ifmgd
->mtx
);
3552 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3553 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3556 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3558 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3560 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3562 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
3564 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
3566 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3567 return sdata
->dev
->operstate
;
3569 EXPORT_SYMBOL(ieee80211_get_operstate
);