2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
122 lockdep_assert_held(&ifmgd
->mtx
);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
137 ASSERT_MGD_MTX(ifmgd
);
139 if (!timer_pending(&ifmgd
->timer
) ||
140 time_before(timeout
, ifmgd
->timer
.expires
))
141 mod_timer(&ifmgd
->timer
, timeout
);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
146 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
149 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
150 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 if (unlikely(!sdata
->u
.mgd
.associated
))
160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
163 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
164 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
166 ifmgd
->probe_send_count
= 0;
169 static int ecw2cw(int ecw
)
171 return (1 << ecw
) - 1;
174 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
175 struct ieee80211_ht_operation
*ht_oper
,
176 const u8
*bssid
, bool reconfig
)
178 struct ieee80211_local
*local
= sdata
->local
;
179 struct ieee80211_supported_band
*sband
;
180 struct sta_info
*sta
;
183 bool disable_40
= false;
185 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
187 switch (sdata
->vif
.bss_conf
.channel_type
) {
188 case NL80211_CHAN_HT40PLUS
:
189 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
192 case NL80211_CHAN_HT40MINUS
:
193 if (local
->hw
.conf
.channel
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
204 mutex_lock(&local
->sta_mtx
);
205 sta
= sta_info_get(sdata
, bssid
);
209 if (sta
&& !sta
->supports_40mhz
)
212 if (sta
&& (!reconfig
||
213 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
214 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
217 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
219 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
221 rate_control_rate_update(local
, sband
, sta
,
222 IEEE80211_RC_BW_CHANGED
);
224 mutex_unlock(&local
->sta_mtx
);
226 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
228 /* if bss configuration changed store the new one */
229 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
230 changed
|= BSS_CHANGED_HT
;
231 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
237 /* frame sending functions */
239 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
240 struct ieee80211_supported_band
*sband
,
246 for (i
= 0; i
< supp_rates_len
; i
++) {
247 int rate
= (supp_rates
[i
] & 0x7F) * 5;
249 for (j
= 0; j
< sband
->n_bitrates
; j
++)
250 if (sband
->bitrates
[j
].bitrate
== rate
) {
260 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
261 struct sk_buff
*skb
, u8 ap_ht_param
,
262 struct ieee80211_supported_band
*sband
,
263 struct ieee80211_channel
*channel
,
264 enum ieee80211_smps_mode smps
)
267 u32 flags
= channel
->flags
;
269 struct ieee80211_sta_ht_cap ht_cap
;
271 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
273 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
274 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
276 /* determine capability flags */
279 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
281 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
282 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
283 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
287 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
288 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
289 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
299 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
300 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
301 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
304 /* set SM PS mode properly */
305 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
307 case IEEE80211_SMPS_AUTOMATIC
:
308 case IEEE80211_SMPS_NUM_MODES
:
310 case IEEE80211_SMPS_OFF
:
311 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
312 IEEE80211_HT_CAP_SM_PS_SHIFT
;
314 case IEEE80211_SMPS_STATIC
:
315 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
316 IEEE80211_HT_CAP_SM_PS_SHIFT
;
318 case IEEE80211_SMPS_DYNAMIC
:
319 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
320 IEEE80211_HT_CAP_SM_PS_SHIFT
;
324 /* reserve and fill IE */
325 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
326 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
329 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
331 struct ieee80211_local
*local
= sdata
->local
;
332 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
333 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
335 struct ieee80211_mgmt
*mgmt
;
337 size_t offset
= 0, noffset
;
338 int i
, count
, rates_len
, supp_rates_len
;
340 struct ieee80211_supported_band
*sband
;
343 lockdep_assert_held(&ifmgd
->mtx
);
345 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
347 if (assoc_data
->supp_rates_len
) {
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
354 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
355 assoc_data
->supp_rates_len
,
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
364 rates_len
= sband
->n_bitrates
;
367 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
368 sizeof(*mgmt
) + /* bit too much but doesn't matter */
369 2 + assoc_data
->ssid_len
+ /* SSID */
370 4 + rates_len
+ /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband
->n_channels
+ /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
374 assoc_data
->ie_len
+ /* extra IEs */
380 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
382 capab
= WLAN_CAPABILITY_ESS
;
384 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
385 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
386 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
387 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
388 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
391 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
392 capab
|= WLAN_CAPABILITY_PRIVACY
;
394 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
395 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
396 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
398 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
400 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
401 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
402 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
404 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
406 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
407 IEEE80211_STYPE_REASSOC_REQ
);
408 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
409 mgmt
->u
.reassoc_req
.listen_interval
=
410 cpu_to_le16(local
->hw
.conf
.listen_interval
);
411 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
415 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
416 IEEE80211_STYPE_ASSOC_REQ
);
417 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
418 mgmt
->u
.assoc_req
.listen_interval
=
419 cpu_to_le16(local
->hw
.conf
.listen_interval
);
423 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
424 *pos
++ = WLAN_EID_SSID
;
425 *pos
++ = assoc_data
->ssid_len
;
426 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
428 /* add all rates which were marked to be used above */
429 supp_rates_len
= rates_len
;
430 if (supp_rates_len
> 8)
433 pos
= skb_put(skb
, supp_rates_len
+ 2);
434 *pos
++ = WLAN_EID_SUPP_RATES
;
435 *pos
++ = supp_rates_len
;
438 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
439 if (BIT(i
) & rates
) {
440 int rate
= sband
->bitrates
[i
].bitrate
;
441 *pos
++ = (u8
) (rate
/ 5);
447 if (rates_len
> count
) {
448 pos
= skb_put(skb
, rates_len
- count
+ 2);
449 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
450 *pos
++ = rates_len
- count
;
452 for (i
++; i
< sband
->n_bitrates
; i
++) {
453 if (BIT(i
) & rates
) {
454 int rate
= sband
->bitrates
[i
].bitrate
;
455 *pos
++ = (u8
) (rate
/ 5);
460 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
461 /* 1. power capabilities */
462 pos
= skb_put(skb
, 4);
463 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
465 *pos
++ = 0; /* min tx power */
466 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
471 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
472 *pos
++ = 2 * sband
->n_channels
;
473 for (i
= 0; i
< sband
->n_channels
; i
++) {
474 *pos
++ = ieee80211_frequency_to_channel(
475 sband
->channels
[i
].center_freq
);
476 *pos
++ = 1; /* one channel in the subband*/
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
482 static const u8 before_ht
[] = {
485 WLAN_EID_EXT_SUPP_RATES
,
486 WLAN_EID_PWR_CAPABILITY
,
487 WLAN_EID_SUPPORTED_CHANNELS
,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
491 WLAN_EID_MOBILITY_DOMAIN
,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
494 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
495 before_ht
, ARRAY_SIZE(before_ht
),
497 pos
= skb_put(skb
, noffset
- offset
);
498 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
502 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
503 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
504 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
508 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
511 pos
= skb_put(skb
, noffset
- offset
);
512 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
516 if (assoc_data
->wmm
) {
517 if (assoc_data
->uapsd
) {
518 qos_info
= ifmgd
->uapsd_queues
;
519 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
525 pos
= skb_put(skb
, 9);
526 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
527 *pos
++ = 7; /* len */
528 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
531 *pos
++ = 2; /* WME */
532 *pos
++ = 0; /* WME info */
533 *pos
++ = 1; /* WME ver */
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
539 noffset
= assoc_data
->ie_len
;
540 pos
= skb_put(skb
, noffset
- offset
);
541 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
544 drv_mgd_prepare_tx(local
, sdata
);
546 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
547 ieee80211_tx_skb(sdata
, skb
);
550 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
551 const u8
*bssid
, u16 stype
,
552 u16 reason
, bool send_frame
,
555 struct ieee80211_local
*local
= sdata
->local
;
556 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
558 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
561 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
562 mgmt
->duration
= 0; /* initialize only */
563 mgmt
->seq_ctrl
= 0; /* initialize only */
564 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
565 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
566 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
567 /* u.deauth.reason_code == u.disassoc.reason_code */
568 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
571 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
572 DEAUTH_DISASSOC_LEN
);
576 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
579 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
580 mgmt
, DEAUTH_DISASSOC_LEN
);
582 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
583 IEEE80211_SKB_CB(skb
)->flags
|=
584 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
586 drv_mgd_prepare_tx(local
, sdata
);
588 ieee80211_tx_skb(sdata
, skb
);
592 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
593 struct ieee80211_sub_if_data
*sdata
)
595 struct ieee80211_pspoll
*pspoll
;
598 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
602 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
603 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
605 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
606 ieee80211_tx_skb(sdata
, skb
);
609 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
610 struct ieee80211_sub_if_data
*sdata
,
614 struct ieee80211_hdr_3addr
*nullfunc
;
615 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
617 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
621 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
623 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
625 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
626 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
627 IEEE80211_STA_CONNECTION_POLL
))
628 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
630 ieee80211_tx_skb(sdata
, skb
);
633 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
634 struct ieee80211_sub_if_data
*sdata
)
637 struct ieee80211_hdr
*nullfunc
;
640 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
643 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
647 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
649 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
650 memset(nullfunc
, 0, 30);
651 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
652 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
653 nullfunc
->frame_control
= fc
;
654 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
655 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
656 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
657 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
659 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
660 ieee80211_tx_skb(sdata
, skb
);
663 /* spectrum management related things */
664 static void ieee80211_chswitch_work(struct work_struct
*work
)
666 struct ieee80211_sub_if_data
*sdata
=
667 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
668 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
670 if (!ieee80211_sdata_running(sdata
))
673 mutex_lock(&ifmgd
->mtx
);
674 if (!ifmgd
->associated
)
677 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
678 if (!sdata
->local
->ops
->channel_switch
) {
679 /* call "hw_config" only if doing sw channel switch */
680 ieee80211_hw_config(sdata
->local
,
681 IEEE80211_CONF_CHANGE_CHANNEL
);
683 /* update the device channel directly */
684 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
687 /* XXX: shouldn't really modify cfg80211-owned data! */
688 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
690 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
691 IEEE80211_QUEUE_STOP_REASON_CSA
);
693 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
694 mutex_unlock(&ifmgd
->mtx
);
697 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
699 struct ieee80211_sub_if_data
*sdata
;
700 struct ieee80211_if_managed
*ifmgd
;
702 sdata
= vif_to_sdata(vif
);
703 ifmgd
= &sdata
->u
.mgd
;
705 trace_api_chswitch_done(sdata
, success
);
708 * If the channel switch was not successful, stay
709 * around on the old channel. We currently lack
710 * good handling of this situation, possibly we
711 * should just drop the association.
713 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
716 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
718 EXPORT_SYMBOL(ieee80211_chswitch_done
);
720 static void ieee80211_chswitch_timer(unsigned long data
)
722 struct ieee80211_sub_if_data
*sdata
=
723 (struct ieee80211_sub_if_data
*) data
;
724 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
726 if (sdata
->local
->quiescing
) {
727 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
731 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
734 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
735 struct ieee80211_channel_sw_ie
*sw_elem
,
736 struct ieee80211_bss
*bss
,
739 struct cfg80211_bss
*cbss
=
740 container_of((void *)bss
, struct cfg80211_bss
, priv
);
741 struct ieee80211_channel
*new_ch
;
742 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
743 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
744 cbss
->channel
->band
);
746 ASSERT_MGD_MTX(ifmgd
);
748 if (!ifmgd
->associated
)
751 if (sdata
->local
->scanning
)
754 /* Disregard subsequent beacons if we are already running a timer
757 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
760 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
761 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
764 sdata
->local
->csa_channel
= new_ch
;
766 if (sdata
->local
->ops
->channel_switch
) {
767 /* use driver's channel switch callback */
768 struct ieee80211_channel_switch ch_switch
;
769 memset(&ch_switch
, 0, sizeof(ch_switch
));
770 ch_switch
.timestamp
= timestamp
;
772 ch_switch
.block_tx
= true;
773 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
774 IEEE80211_QUEUE_STOP_REASON_CSA
);
776 ch_switch
.channel
= new_ch
;
777 ch_switch
.count
= sw_elem
->count
;
778 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
779 drv_channel_switch(sdata
->local
, &ch_switch
);
783 /* channel switch handled in software */
784 if (sw_elem
->count
<= 1) {
785 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
788 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
789 IEEE80211_QUEUE_STOP_REASON_CSA
);
790 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
791 mod_timer(&ifmgd
->chswitch_timer
,
793 msecs_to_jiffies(sw_elem
->count
*
794 cbss
->beacon_interval
));
798 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
799 u16 capab_info
, u8
*pwr_constr_elem
,
800 u8 pwr_constr_elem_len
)
802 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
804 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
807 /* Power constraint IE length should be 1 octet */
808 if (pwr_constr_elem_len
!= 1)
811 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
812 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
813 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
814 ieee80211_hw_config(sdata
->local
, 0);
818 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
820 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
821 struct ieee80211_local
*local
= sdata
->local
;
822 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
824 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
825 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
826 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
828 local
->disable_dynamic_ps
= false;
829 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
831 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
833 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
835 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
836 struct ieee80211_local
*local
= sdata
->local
;
837 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
839 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
840 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
841 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
843 local
->disable_dynamic_ps
= true;
844 conf
->dynamic_ps_timeout
= 0;
845 del_timer_sync(&local
->dynamic_ps_timer
);
846 ieee80211_queue_work(&local
->hw
,
847 &local
->dynamic_ps_enable_work
);
849 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
852 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
853 struct ieee80211_sub_if_data
*sdata
)
855 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
858 * If we are scanning right now then the parameters will
859 * take effect when scan finishes.
864 if (conf
->dynamic_ps_timeout
> 0 &&
865 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
866 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
867 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
869 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
870 ieee80211_send_nullfunc(local
, sdata
, 1);
872 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
873 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
876 conf
->flags
|= IEEE80211_CONF_PS
;
877 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
881 static void ieee80211_change_ps(struct ieee80211_local
*local
)
883 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
885 if (local
->ps_sdata
) {
886 ieee80211_enable_ps(local
, local
->ps_sdata
);
887 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
888 conf
->flags
&= ~IEEE80211_CONF_PS
;
889 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
890 del_timer_sync(&local
->dynamic_ps_timer
);
891 cancel_work_sync(&local
->dynamic_ps_enable_work
);
895 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
897 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
898 struct sta_info
*sta
= NULL
;
899 bool authorized
= false;
907 if (!mgd
->associated
)
910 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
911 IEEE80211_STA_CONNECTION_POLL
))
915 sta
= sta_info_get(sdata
, mgd
->bssid
);
917 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
923 /* need to hold RTNL or interface lock */
924 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
926 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
930 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
931 local
->ps_sdata
= NULL
;
935 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
936 if (!ieee80211_sdata_running(sdata
))
938 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
939 /* If an AP vif is found, then disable PS
940 * by setting the count to zero thereby setting
946 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
952 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
953 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
957 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
959 beaconint_us
= ieee80211_tu_to_usec(
960 found
->vif
.bss_conf
.beacon_int
);
962 timeout
= local
->dynamic_ps_forced_timeout
;
965 * Go to full PSM if the user configures a very low
966 * latency requirement.
967 * The 2000 second value is there for compatibility
968 * until the PM_QOS_NETWORK_LATENCY is configured
971 if (latency
> (1900 * USEC_PER_MSEC
) &&
972 latency
!= (2000 * USEC_PER_SEC
))
977 local
->dynamic_ps_user_timeout
= timeout
;
978 if (!local
->disable_dynamic_ps
)
979 conf
->dynamic_ps_timeout
=
980 local
->dynamic_ps_user_timeout
;
982 if (beaconint_us
> latency
) {
983 local
->ps_sdata
= NULL
;
985 struct ieee80211_bss
*bss
;
989 bss
= (void *)found
->u
.mgd
.associated
->priv
;
990 dtimper
= bss
->dtim_period
;
992 /* If the TIM IE is invalid, pretend the value is 1 */
995 else if (dtimper
> 1)
996 maxslp
= min_t(int, dtimper
,
997 latency
/ beaconint_us
);
999 local
->hw
.conf
.max_sleep_period
= maxslp
;
1000 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1001 local
->ps_sdata
= found
;
1004 local
->ps_sdata
= NULL
;
1007 ieee80211_change_ps(local
);
1010 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1012 struct ieee80211_local
*local
=
1013 container_of(work
, struct ieee80211_local
,
1014 dynamic_ps_disable_work
);
1016 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1017 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1018 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1021 ieee80211_wake_queues_by_reason(&local
->hw
,
1022 IEEE80211_QUEUE_STOP_REASON_PS
);
1025 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1027 struct ieee80211_local
*local
=
1028 container_of(work
, struct ieee80211_local
,
1029 dynamic_ps_enable_work
);
1030 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1031 struct ieee80211_if_managed
*ifmgd
;
1032 unsigned long flags
;
1035 /* can only happen when PS was just disabled anyway */
1039 ifmgd
= &sdata
->u
.mgd
;
1041 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1044 if (!local
->disable_dynamic_ps
&&
1045 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1046 /* don't enter PS if TX frames are pending */
1047 if (drv_tx_frames_pending(local
)) {
1048 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1050 local
->hw
.conf
.dynamic_ps_timeout
));
1055 * transmission can be stopped by others which leads to
1056 * dynamic_ps_timer expiry. Postpone the ps timer if it
1057 * is not the actual idle state.
1059 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1060 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1061 if (local
->queue_stop_reasons
[q
]) {
1062 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1064 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1066 local
->hw
.conf
.dynamic_ps_timeout
));
1070 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1073 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1074 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1075 netif_tx_stop_all_queues(sdata
->dev
);
1077 if (drv_tx_frames_pending(local
))
1078 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1080 local
->hw
.conf
.dynamic_ps_timeout
));
1082 ieee80211_send_nullfunc(local
, sdata
, 1);
1083 /* Flush to get the tx status of nullfunc frame */
1084 drv_flush(local
, false);
1088 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1089 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1090 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1091 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1092 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1093 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1096 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1097 netif_tx_wake_all_queues(sdata
->dev
);
1100 void ieee80211_dynamic_ps_timer(unsigned long data
)
1102 struct ieee80211_local
*local
= (void *) data
;
1104 if (local
->quiescing
|| local
->suspended
)
1107 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1111 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1112 struct ieee80211_sub_if_data
*sdata
,
1113 u8
*wmm_param
, size_t wmm_param_len
)
1115 struct ieee80211_tx_queue_params params
;
1116 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1119 u8
*pos
, uapsd_queues
= 0;
1121 if (!local
->ops
->conf_tx
)
1124 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1130 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1133 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1134 uapsd_queues
= ifmgd
->uapsd_queues
;
1136 count
= wmm_param
[6] & 0x0f;
1137 if (count
== ifmgd
->wmm_last_param_set
)
1139 ifmgd
->wmm_last_param_set
= count
;
1141 pos
= wmm_param
+ 8;
1142 left
= wmm_param_len
- 8;
1144 memset(¶ms
, 0, sizeof(params
));
1147 for (; left
>= 4; left
-= 4, pos
+= 4) {
1148 int aci
= (pos
[0] >> 5) & 0x03;
1149 int acm
= (pos
[0] >> 4) & 0x01;
1157 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1158 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1164 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1165 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1171 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1172 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1179 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1180 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1185 params
.aifs
= pos
[0] & 0x0f;
1186 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1187 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1188 params
.txop
= get_unaligned_le16(pos
+ 2);
1189 params
.uapsd
= uapsd
;
1192 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1194 params
.aifs
, params
.cw_min
, params
.cw_max
,
1195 params
.txop
, params
.uapsd
);
1196 sdata
->tx_conf
[queue
] = params
;
1197 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1199 "failed to set TX queue parameters for queue %d\n",
1203 /* enable WMM or activate new settings */
1204 sdata
->vif
.bss_conf
.qos
= true;
1207 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1209 lockdep_assert_held(&sdata
->local
->mtx
);
1211 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1212 IEEE80211_STA_BEACON_POLL
);
1213 ieee80211_run_deferred_scan(sdata
->local
);
1216 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1218 mutex_lock(&sdata
->local
->mtx
);
1219 __ieee80211_stop_poll(sdata
);
1220 mutex_unlock(&sdata
->local
->mtx
);
1223 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1224 u16 capab
, bool erp_valid
, u8 erp
)
1226 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1228 bool use_protection
;
1229 bool use_short_preamble
;
1230 bool use_short_slot
;
1233 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1234 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1236 use_protection
= false;
1237 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1240 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1241 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1242 use_short_slot
= true;
1244 if (use_protection
!= bss_conf
->use_cts_prot
) {
1245 bss_conf
->use_cts_prot
= use_protection
;
1246 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1249 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1250 bss_conf
->use_short_preamble
= use_short_preamble
;
1251 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1254 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1255 bss_conf
->use_short_slot
= use_short_slot
;
1256 changed
|= BSS_CHANGED_ERP_SLOT
;
1262 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1263 struct cfg80211_bss
*cbss
,
1264 u32 bss_info_changed
)
1266 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1267 struct ieee80211_local
*local
= sdata
->local
;
1268 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1270 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1271 /* set timing information */
1272 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1273 bss_conf
->last_tsf
= cbss
->tsf
;
1275 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1276 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1277 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1279 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1280 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1282 sdata
->u
.mgd
.associated
= cbss
;
1283 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1285 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1287 /* just to be sure */
1288 ieee80211_stop_poll(sdata
);
1290 ieee80211_led_assoc(local
, 1);
1292 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1293 bss_conf
->dtim_period
= bss
->dtim_period
;
1295 bss_conf
->dtim_period
= 0;
1297 bss_conf
->assoc
= 1;
1299 /* Tell the driver to monitor connection quality (if supported) */
1300 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1301 bss_conf
->cqm_rssi_thold
)
1302 bss_info_changed
|= BSS_CHANGED_CQM
;
1304 /* Enable ARP filtering */
1305 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1306 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1307 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1310 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1312 mutex_lock(&local
->iflist_mtx
);
1313 ieee80211_recalc_ps(local
, -1);
1314 ieee80211_recalc_smps(local
);
1315 mutex_unlock(&local
->iflist_mtx
);
1317 netif_tx_start_all_queues(sdata
->dev
);
1318 netif_carrier_on(sdata
->dev
);
1321 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1322 u16 stype
, u16 reason
, bool tx
,
1325 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1326 struct ieee80211_local
*local
= sdata
->local
;
1327 struct sta_info
*sta
;
1331 ASSERT_MGD_MTX(ifmgd
);
1333 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1336 if (WARN_ON(!ifmgd
->associated
))
1339 ieee80211_stop_poll(sdata
);
1341 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1343 ifmgd
->associated
= NULL
;
1344 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1347 * we need to commit the associated = NULL change because the
1348 * scan code uses that to determine whether this iface should
1349 * go to/wake up from powersave or not -- and could otherwise
1350 * wake the queues erroneously.
1355 * Thus, we can only afterwards stop the queues -- to account
1356 * for the case where another CPU is finishing a scan at this
1357 * time -- we don't want the scan code to enable queues.
1360 netif_tx_stop_all_queues(sdata
->dev
);
1361 netif_carrier_off(sdata
->dev
);
1363 mutex_lock(&local
->sta_mtx
);
1364 sta
= sta_info_get(sdata
, bssid
);
1366 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1367 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1369 mutex_unlock(&local
->sta_mtx
);
1371 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1373 drv_flush(local
, false);
1375 /* deauthenticate/disassociate now */
1376 if (tx
|| frame_buf
)
1377 ieee80211_send_deauth_disassoc(sdata
, bssid
, stype
, reason
,
1380 /* flush out frame */
1382 drv_flush(local
, false);
1384 /* remove AP and TDLS peers */
1385 sta_info_flush(local
, sdata
);
1387 /* finally reset all BSS / config parameters */
1388 changed
|= ieee80211_reset_erp_info(sdata
);
1390 ieee80211_led_assoc(local
, 0);
1391 changed
|= BSS_CHANGED_ASSOC
;
1392 sdata
->vif
.bss_conf
.assoc
= false;
1394 /* on the next assoc, re-program HT parameters */
1395 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1396 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1398 local
->power_constr_level
= 0;
1400 del_timer_sync(&local
->dynamic_ps_timer
);
1401 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1403 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1404 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1405 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1407 local
->ps_sdata
= NULL
;
1409 /* Disable ARP filtering */
1410 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1411 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1412 changed
|= BSS_CHANGED_ARP_FILTER
;
1415 sdata
->vif
.bss_conf
.qos
= false;
1416 changed
|= BSS_CHANGED_QOS
;
1418 /* The BSSID (not really interesting) and HT changed */
1419 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1420 ieee80211_bss_info_change_notify(sdata
, changed
);
1422 /* channel(_type) changes are handled by ieee80211_hw_config */
1423 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1424 ieee80211_hw_config(local
, 0);
1426 /* disassociated - set to defaults now */
1427 ieee80211_set_wmm_default(sdata
, false);
1429 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1430 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1431 del_timer_sync(&sdata
->u
.mgd
.timer
);
1432 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1435 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1436 struct ieee80211_hdr
*hdr
)
1439 * We can postpone the mgd.timer whenever receiving unicast frames
1440 * from AP because we know that the connection is working both ways
1441 * at that time. But multicast frames (and hence also beacons) must
1442 * be ignored here, because we need to trigger the timer during
1443 * data idle periods for sending the periodic probe request to the
1444 * AP we're connected to.
1446 if (is_multicast_ether_addr(hdr
->addr1
))
1449 ieee80211_sta_reset_conn_monitor(sdata
);
1452 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1454 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1455 struct ieee80211_local
*local
= sdata
->local
;
1457 mutex_lock(&local
->mtx
);
1458 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1459 IEEE80211_STA_CONNECTION_POLL
))) {
1460 mutex_unlock(&local
->mtx
);
1464 __ieee80211_stop_poll(sdata
);
1466 mutex_lock(&local
->iflist_mtx
);
1467 ieee80211_recalc_ps(local
, -1);
1468 mutex_unlock(&local
->iflist_mtx
);
1470 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1474 * We've received a probe response, but are not sure whether
1475 * we have or will be receiving any beacons or data, so let's
1476 * schedule the timers again, just in case.
1478 ieee80211_sta_reset_beacon_monitor(sdata
);
1480 mod_timer(&ifmgd
->conn_mon_timer
,
1481 round_jiffies_up(jiffies
+
1482 IEEE80211_CONNECTION_IDLE_TIME
));
1484 mutex_unlock(&local
->mtx
);
1487 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1488 struct ieee80211_hdr
*hdr
, bool ack
)
1490 if (!ieee80211_is_data(hdr
->frame_control
))
1494 ieee80211_sta_reset_conn_monitor(sdata
);
1496 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1497 sdata
->u
.mgd
.probe_send_count
> 0) {
1499 sdata
->u
.mgd
.probe_send_count
= 0;
1501 sdata
->u
.mgd
.nullfunc_failed
= true;
1502 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1506 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1508 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1510 u8
*dst
= ifmgd
->associated
->bssid
;
1511 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1514 * Try sending broadcast probe requests for the last three
1515 * probe requests after the first ones failed since some
1516 * buggy APs only support broadcast probe requests.
1518 if (ifmgd
->probe_send_count
>= unicast_limit
)
1522 * When the hardware reports an accurate Tx ACK status, it's
1523 * better to send a nullfunc frame instead of a probe request,
1524 * as it will kick us off the AP quickly if we aren't associated
1525 * anymore. The timeout will be reset if the frame is ACKed by
1528 ifmgd
->probe_send_count
++;
1530 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1531 ifmgd
->nullfunc_failed
= false;
1532 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1536 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1537 if (WARN_ON_ONCE(ssid
== NULL
))
1542 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1543 0, (u32
) -1, true, false);
1546 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1547 run_again(ifmgd
, ifmgd
->probe_timeout
);
1548 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1549 drv_flush(sdata
->local
, false);
1552 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1555 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1556 bool already
= false;
1558 if (!ieee80211_sdata_running(sdata
))
1561 mutex_lock(&ifmgd
->mtx
);
1563 if (!ifmgd
->associated
)
1566 mutex_lock(&sdata
->local
->mtx
);
1568 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1569 mutex_unlock(&sdata
->local
->mtx
);
1574 mlme_dbg_ratelimited(sdata
,
1575 "detected beacon loss from AP - sending probe request\n");
1577 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1578 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1581 * The driver/our work has already reported this event or the
1582 * connection monitoring has kicked in and we have already sent
1583 * a probe request. Or maybe the AP died and the driver keeps
1584 * reporting until we disassociate...
1586 * In either case we have to ignore the current call to this
1587 * function (except for setting the correct probe reason bit)
1588 * because otherwise we would reset the timer every time and
1589 * never check whether we received a probe response!
1591 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1592 IEEE80211_STA_CONNECTION_POLL
))
1596 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1598 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1600 mutex_unlock(&sdata
->local
->mtx
);
1605 mutex_lock(&sdata
->local
->iflist_mtx
);
1606 ieee80211_recalc_ps(sdata
->local
, -1);
1607 mutex_unlock(&sdata
->local
->iflist_mtx
);
1609 ifmgd
->probe_send_count
= 0;
1610 ieee80211_mgd_probe_ap_send(sdata
);
1612 mutex_unlock(&ifmgd
->mtx
);
1615 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1616 struct ieee80211_vif
*vif
)
1618 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1619 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1620 struct cfg80211_bss
*cbss
;
1621 struct sk_buff
*skb
;
1625 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1628 ASSERT_MGD_MTX(ifmgd
);
1630 if (ifmgd
->associated
)
1631 cbss
= ifmgd
->associated
;
1632 else if (ifmgd
->auth_data
)
1633 cbss
= ifmgd
->auth_data
->bss
;
1634 else if (ifmgd
->assoc_data
)
1635 cbss
= ifmgd
->assoc_data
->bss
;
1639 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1640 if (WARN_ON_ONCE(ssid
== NULL
))
1645 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1646 (u32
) -1, ssid
+ 2, ssid_len
,
1651 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1653 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1655 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1656 struct ieee80211_local
*local
= sdata
->local
;
1658 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1660 mutex_lock(&ifmgd
->mtx
);
1661 if (!ifmgd
->associated
) {
1662 mutex_unlock(&ifmgd
->mtx
);
1666 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1668 sdata_info(sdata
, "Connection to AP %pM lost\n", bssid
);
1670 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1671 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1673 mutex_unlock(&ifmgd
->mtx
);
1676 * must be outside lock due to cfg80211,
1677 * but that's not a problem.
1679 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1681 mutex_lock(&local
->mtx
);
1682 ieee80211_recalc_idle(local
);
1683 mutex_unlock(&local
->mtx
);
1686 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1688 struct ieee80211_sub_if_data
*sdata
=
1689 container_of(work
, struct ieee80211_sub_if_data
,
1690 u
.mgd
.beacon_connection_loss_work
);
1691 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1692 struct sta_info
*sta
;
1694 if (ifmgd
->associated
) {
1696 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1698 sta
->beacon_loss_count
++;
1702 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1703 __ieee80211_connection_loss(sdata
);
1705 ieee80211_mgd_probe_ap(sdata
, true);
1708 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1710 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1711 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1713 trace_api_beacon_loss(sdata
);
1715 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1716 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1718 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1720 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1722 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1723 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1725 trace_api_connection_loss(sdata
);
1727 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1728 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1730 EXPORT_SYMBOL(ieee80211_connection_loss
);
1733 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1736 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1738 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1741 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1743 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1744 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1747 cfg80211_put_bss(auth_data
->bss
);
1749 sdata
->u
.mgd
.auth_data
= NULL
;
1752 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1753 struct ieee80211_mgmt
*mgmt
, size_t len
)
1755 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1757 struct ieee802_11_elems elems
;
1759 pos
= mgmt
->u
.auth
.variable
;
1760 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1761 if (!elems
.challenge
)
1763 auth_data
->expected_transaction
= 4;
1764 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1765 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1766 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1767 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1768 auth_data
->key
, auth_data
->key_len
,
1769 auth_data
->key_idx
);
1772 static enum rx_mgmt_action __must_check
1773 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1774 struct ieee80211_mgmt
*mgmt
, size_t len
)
1776 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1778 u16 auth_alg
, auth_transaction
, status_code
;
1779 struct sta_info
*sta
;
1781 lockdep_assert_held(&ifmgd
->mtx
);
1784 return RX_MGMT_NONE
;
1786 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1787 return RX_MGMT_NONE
;
1789 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1791 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1792 return RX_MGMT_NONE
;
1794 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1795 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1796 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1798 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1799 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1800 return RX_MGMT_NONE
;
1802 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1803 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1804 mgmt
->sa
, status_code
);
1805 ieee80211_destroy_auth_data(sdata
, false);
1806 return RX_MGMT_CFG80211_RX_AUTH
;
1809 switch (ifmgd
->auth_data
->algorithm
) {
1810 case WLAN_AUTH_OPEN
:
1811 case WLAN_AUTH_LEAP
:
1814 case WLAN_AUTH_SHARED_KEY
:
1815 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1816 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1817 /* need another frame */
1818 return RX_MGMT_NONE
;
1822 WARN_ONCE(1, "invalid auth alg %d",
1823 ifmgd
->auth_data
->algorithm
);
1824 return RX_MGMT_NONE
;
1827 sdata_info(sdata
, "authenticated\n");
1828 ifmgd
->auth_data
->done
= true;
1829 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1830 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1832 /* move station state to auth */
1833 mutex_lock(&sdata
->local
->sta_mtx
);
1834 sta
= sta_info_get(sdata
, bssid
);
1836 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1839 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1840 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
1843 mutex_unlock(&sdata
->local
->sta_mtx
);
1845 return RX_MGMT_CFG80211_RX_AUTH
;
1847 mutex_unlock(&sdata
->local
->sta_mtx
);
1848 /* ignore frame -- wait for timeout */
1849 return RX_MGMT_NONE
;
1853 static enum rx_mgmt_action __must_check
1854 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1855 struct ieee80211_mgmt
*mgmt
, size_t len
)
1857 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1858 const u8
*bssid
= NULL
;
1861 lockdep_assert_held(&ifmgd
->mtx
);
1864 return RX_MGMT_NONE
;
1866 if (!ifmgd
->associated
||
1867 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1868 return RX_MGMT_NONE
;
1870 bssid
= ifmgd
->associated
->bssid
;
1872 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1874 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
1875 bssid
, reason_code
);
1877 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1879 mutex_lock(&sdata
->local
->mtx
);
1880 ieee80211_recalc_idle(sdata
->local
);
1881 mutex_unlock(&sdata
->local
->mtx
);
1883 return RX_MGMT_CFG80211_DEAUTH
;
1887 static enum rx_mgmt_action __must_check
1888 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1889 struct ieee80211_mgmt
*mgmt
, size_t len
)
1891 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1894 lockdep_assert_held(&ifmgd
->mtx
);
1897 return RX_MGMT_NONE
;
1899 if (!ifmgd
->associated
||
1900 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1901 return RX_MGMT_NONE
;
1903 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1905 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
1906 mgmt
->sa
, reason_code
);
1908 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1910 mutex_lock(&sdata
->local
->mtx
);
1911 ieee80211_recalc_idle(sdata
->local
);
1912 mutex_unlock(&sdata
->local
->mtx
);
1914 return RX_MGMT_CFG80211_DISASSOC
;
1917 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1918 u8
*supp_rates
, unsigned int supp_rates_len
,
1919 u32
*rates
, u32
*basic_rates
,
1920 bool *have_higher_than_11mbit
,
1921 int *min_rate
, int *min_rate_index
)
1925 for (i
= 0; i
< supp_rates_len
; i
++) {
1926 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1927 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1930 *have_higher_than_11mbit
= true;
1933 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1934 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1936 * Note: Even through the membership selector and the basic
1937 * rate flag share the same bit, they are not exactly
1940 if (!!(supp_rates
[i
] & 0x80) &&
1941 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1944 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1945 if (sband
->bitrates
[j
].bitrate
== rate
) {
1948 *basic_rates
|= BIT(j
);
1949 if (rate
< *min_rate
) {
1951 *min_rate_index
= j
;
1959 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1962 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1964 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1967 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1969 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1970 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1974 sdata
->u
.mgd
.assoc_data
= NULL
;
1977 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1978 struct cfg80211_bss
*cbss
,
1979 struct ieee80211_mgmt
*mgmt
, size_t len
)
1981 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1982 struct ieee80211_local
*local
= sdata
->local
;
1983 struct ieee80211_supported_band
*sband
;
1984 struct sta_info
*sta
;
1986 u16 capab_info
, aid
;
1987 struct ieee802_11_elems elems
;
1988 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1992 /* AssocResp and ReassocResp have identical structure */
1994 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1995 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1997 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1998 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2000 aid
&= ~(BIT(15) | BIT(14));
2002 ifmgd
->broken_ap
= false;
2004 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2005 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2008 ifmgd
->broken_ap
= true;
2011 pos
= mgmt
->u
.assoc_resp
.variable
;
2012 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2014 if (!elems
.supp_rates
) {
2015 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2021 mutex_lock(&sdata
->local
->sta_mtx
);
2023 * station info was already allocated and inserted before
2024 * the association and should be available to us
2026 sta
= sta_info_get(sdata
, cbss
->bssid
);
2027 if (WARN_ON(!sta
)) {
2028 mutex_unlock(&sdata
->local
->sta_mtx
);
2032 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2034 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2035 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2036 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2038 sta
->supports_40mhz
=
2039 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2041 rate_control_rate_init(sta
);
2043 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2044 set_sta_flag(sta
, WLAN_STA_MFP
);
2046 if (elems
.wmm_param
)
2047 set_sta_flag(sta
, WLAN_STA_WME
);
2049 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2051 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2052 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2053 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2056 "failed to move station %pM to desired state\n",
2058 WARN_ON(__sta_info_destroy(sta
));
2059 mutex_unlock(&sdata
->local
->sta_mtx
);
2063 mutex_unlock(&sdata
->local
->sta_mtx
);
2066 * Always handle WMM once after association regardless
2067 * of the first value the AP uses. Setting -1 here has
2068 * that effect because the AP values is an unsigned
2071 ifmgd
->wmm_last_param_set
= -1;
2073 if (elems
.wmm_param
)
2074 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2075 elems
.wmm_param_len
);
2077 ieee80211_set_wmm_default(sdata
, false);
2078 changed
|= BSS_CHANGED_QOS
;
2080 if (elems
.ht_operation
&& elems
.wmm_param
&&
2081 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2082 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2083 cbss
->bssid
, false);
2085 /* set AID and assoc capability,
2086 * ieee80211_set_associated() will tell the driver */
2087 bss_conf
->aid
= aid
;
2088 bss_conf
->assoc_capability
= capab_info
;
2089 ieee80211_set_associated(sdata
, cbss
, changed
);
2092 * If we're using 4-addr mode, let the AP know that we're
2093 * doing so, so that it can create the STA VLAN on its side
2095 if (ifmgd
->use_4addr
)
2096 ieee80211_send_4addr_nullfunc(local
, sdata
);
2099 * Start timer to probe the connection to the AP now.
2100 * Also start the timer that will detect beacon loss.
2102 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2103 ieee80211_sta_reset_beacon_monitor(sdata
);
2108 static enum rx_mgmt_action __must_check
2109 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2110 struct ieee80211_mgmt
*mgmt
, size_t len
,
2111 struct cfg80211_bss
**bss
)
2113 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2114 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2115 u16 capab_info
, status_code
, aid
;
2116 struct ieee802_11_elems elems
;
2120 lockdep_assert_held(&ifmgd
->mtx
);
2123 return RX_MGMT_NONE
;
2124 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2125 return RX_MGMT_NONE
;
2128 * AssocResp and ReassocResp have identical structure, so process both
2129 * of them in this function.
2133 return RX_MGMT_NONE
;
2135 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2136 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2137 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2138 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2141 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2142 reassoc
? "Rea" : "A", mgmt
->sa
,
2143 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2145 pos
= mgmt
->u
.assoc_resp
.variable
;
2146 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2148 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2149 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2150 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2152 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2153 ms
= tu
* 1024 / 1000;
2155 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2157 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2158 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2159 run_again(ifmgd
, assoc_data
->timeout
);
2160 return RX_MGMT_NONE
;
2163 *bss
= assoc_data
->bss
;
2165 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2166 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2167 mgmt
->sa
, status_code
);
2168 ieee80211_destroy_assoc_data(sdata
, false);
2170 sdata_info(sdata
, "associated\n");
2172 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2173 /* oops -- internal error -- send timeout for now */
2174 ieee80211_destroy_assoc_data(sdata
, true);
2175 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2176 cfg80211_put_bss(*bss
);
2177 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2181 * destroy assoc_data afterwards, as otherwise an idle
2182 * recalc after assoc_data is NULL but before associated
2183 * is set can cause the interface to go idle
2185 ieee80211_destroy_assoc_data(sdata
, true);
2188 return RX_MGMT_CFG80211_RX_ASSOC
;
2190 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2191 struct ieee80211_mgmt
*mgmt
,
2193 struct ieee80211_rx_status
*rx_status
,
2194 struct ieee802_11_elems
*elems
,
2197 struct ieee80211_local
*local
= sdata
->local
;
2199 struct ieee80211_bss
*bss
;
2200 struct ieee80211_channel
*channel
;
2201 bool need_ps
= false;
2203 if (sdata
->u
.mgd
.associated
&&
2204 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2205 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2206 /* not previously set so we may need to recalc */
2207 need_ps
= !bss
->dtim_period
;
2210 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2211 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2214 freq
= rx_status
->freq
;
2216 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2218 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2221 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2224 ieee80211_rx_bss_put(local
, bss
);
2226 if (!sdata
->u
.mgd
.associated
)
2230 mutex_lock(&local
->iflist_mtx
);
2231 ieee80211_recalc_ps(local
, -1);
2232 mutex_unlock(&local
->iflist_mtx
);
2235 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2236 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2238 struct ieee80211_channel_sw_ie
*sw_elem
=
2239 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2240 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2241 bss
, rx_status
->mactime
);
2246 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2247 struct sk_buff
*skb
)
2249 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2250 struct ieee80211_if_managed
*ifmgd
;
2251 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2252 size_t baselen
, len
= skb
->len
;
2253 struct ieee802_11_elems elems
;
2255 ifmgd
= &sdata
->u
.mgd
;
2257 ASSERT_MGD_MTX(ifmgd
);
2259 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2260 return; /* ignore ProbeResp to foreign address */
2262 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2266 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2269 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2271 if (ifmgd
->associated
&&
2272 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2273 ieee80211_reset_ap_probe(sdata
);
2275 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2276 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2277 /* got probe response, continue with auth */
2278 sdata_info(sdata
, "direct probe responded\n");
2279 ifmgd
->auth_data
->tries
= 0;
2280 ifmgd
->auth_data
->timeout
= jiffies
;
2281 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2286 * This is the canonical list of information elements we care about,
2287 * the filter code also gives us all changes to the Microsoft OUI
2288 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2290 * We implement beacon filtering in software since that means we can
2291 * avoid processing the frame here and in cfg80211, and userspace
2292 * will not be able to tell whether the hardware supports it or not.
2294 * XXX: This list needs to be dynamic -- userspace needs to be able to
2295 * add items it requires. It also needs to be able to tell us to
2296 * look out for other vendor IEs.
2298 static const u64 care_about_ies
=
2299 (1ULL << WLAN_EID_COUNTRY
) |
2300 (1ULL << WLAN_EID_ERP_INFO
) |
2301 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2302 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2303 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2304 (1ULL << WLAN_EID_HT_OPERATION
);
2306 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2307 struct ieee80211_mgmt
*mgmt
,
2309 struct ieee80211_rx_status
*rx_status
)
2311 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2312 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2314 struct ieee802_11_elems elems
;
2315 struct ieee80211_local
*local
= sdata
->local
;
2317 bool erp_valid
, directed_tim
= false;
2322 lockdep_assert_held(&ifmgd
->mtx
);
2324 /* Process beacon from the current BSS */
2325 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2329 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2332 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2333 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2334 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2335 len
- baselen
, &elems
);
2337 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2339 ifmgd
->assoc_data
->have_beacon
= true;
2340 ifmgd
->assoc_data
->sent_assoc
= false;
2341 /* continue assoc process */
2342 ifmgd
->assoc_data
->timeout
= jiffies
;
2343 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2347 if (!ifmgd
->associated
||
2348 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2350 bssid
= ifmgd
->associated
->bssid
;
2352 /* Track average RSSI from the Beacon frames of the current AP */
2353 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2354 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2355 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2356 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2357 ifmgd
->last_cqm_event_signal
= 0;
2358 ifmgd
->count_beacon_signal
= 1;
2359 ifmgd
->last_ave_beacon_signal
= 0;
2361 ifmgd
->ave_beacon_signal
=
2362 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2363 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2364 ifmgd
->ave_beacon_signal
) / 16;
2365 ifmgd
->count_beacon_signal
++;
2368 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2369 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2370 int sig
= ifmgd
->ave_beacon_signal
;
2371 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2374 * if signal crosses either of the boundaries, invoke callback
2375 * with appropriate parameters
2377 if (sig
> ifmgd
->rssi_max_thold
&&
2378 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2379 ifmgd
->last_ave_beacon_signal
= sig
;
2380 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2381 } else if (sig
< ifmgd
->rssi_min_thold
&&
2382 (last_sig
>= ifmgd
->rssi_max_thold
||
2384 ifmgd
->last_ave_beacon_signal
= sig
;
2385 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2389 if (bss_conf
->cqm_rssi_thold
&&
2390 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2391 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2392 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2393 int last_event
= ifmgd
->last_cqm_event_signal
;
2394 int thold
= bss_conf
->cqm_rssi_thold
;
2395 int hyst
= bss_conf
->cqm_rssi_hyst
;
2397 (last_event
== 0 || sig
< last_event
- hyst
)) {
2398 ifmgd
->last_cqm_event_signal
= sig
;
2399 ieee80211_cqm_rssi_notify(
2401 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2403 } else if (sig
> thold
&&
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_HIGH
,
2413 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2414 mlme_dbg_ratelimited(sdata
,
2415 "cancelling probereq poll due to a received beacon\n");
2416 mutex_lock(&local
->mtx
);
2417 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2418 ieee80211_run_deferred_scan(local
);
2419 mutex_unlock(&local
->mtx
);
2421 mutex_lock(&local
->iflist_mtx
);
2422 ieee80211_recalc_ps(local
, -1);
2423 mutex_unlock(&local
->iflist_mtx
);
2427 * Push the beacon loss detection into the future since
2428 * we are processing a beacon from the AP just now.
2430 ieee80211_sta_reset_beacon_monitor(sdata
);
2432 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2433 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2434 len
- baselen
, &elems
,
2435 care_about_ies
, ncrc
);
2437 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2438 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2441 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2442 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2445 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2446 elems
.wmm_param_len
);
2449 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2451 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2452 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2453 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2454 ieee80211_hw_config(local
,
2455 IEEE80211_CONF_CHANGE_PS
);
2457 ieee80211_send_nullfunc(local
, sdata
, 0);
2458 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2459 local
->pspolling
= true;
2462 * Here is assumed that the driver will be
2463 * able to send ps-poll frame and receive a
2464 * response even though power save mode is
2465 * enabled, but some drivers might require
2466 * to disable power save here. This needs
2467 * to be investigated.
2469 ieee80211_send_pspoll(local
, sdata
);
2474 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2476 ifmgd
->beacon_crc
= ncrc
;
2477 ifmgd
->beacon_crc_valid
= true;
2479 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2481 erp_value
= elems
.erp_info
[0];
2485 changed
|= ieee80211_handle_bss_capability(sdata
,
2486 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2487 erp_valid
, erp_value
);
2490 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2491 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2492 struct ieee80211_supported_band
*sband
;
2494 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2496 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2500 /* Note: country IE parsing is done for us by cfg80211 */
2501 if (elems
.country_elem
) {
2502 /* TODO: IBSS also needs this */
2503 if (elems
.pwr_constr_elem
)
2504 ieee80211_handle_pwr_constr(sdata
,
2505 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2506 elems
.pwr_constr_elem
,
2507 elems
.pwr_constr_elem_len
);
2510 ieee80211_bss_info_change_notify(sdata
, changed
);
2513 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2514 struct sk_buff
*skb
)
2516 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2517 struct ieee80211_rx_status
*rx_status
;
2518 struct ieee80211_mgmt
*mgmt
;
2519 struct cfg80211_bss
*bss
= NULL
;
2520 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2523 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2524 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2525 fc
= le16_to_cpu(mgmt
->frame_control
);
2527 mutex_lock(&ifmgd
->mtx
);
2529 switch (fc
& IEEE80211_FCTL_STYPE
) {
2530 case IEEE80211_STYPE_BEACON
:
2531 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2533 case IEEE80211_STYPE_PROBE_RESP
:
2534 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2536 case IEEE80211_STYPE_AUTH
:
2537 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2539 case IEEE80211_STYPE_DEAUTH
:
2540 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2542 case IEEE80211_STYPE_DISASSOC
:
2543 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2545 case IEEE80211_STYPE_ASSOC_RESP
:
2546 case IEEE80211_STYPE_REASSOC_RESP
:
2547 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2549 case IEEE80211_STYPE_ACTION
:
2550 switch (mgmt
->u
.action
.category
) {
2551 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2552 ieee80211_sta_process_chanswitch(sdata
,
2553 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2554 (void *)ifmgd
->associated
->priv
,
2555 rx_status
->mactime
);
2559 mutex_unlock(&ifmgd
->mtx
);
2565 case RX_MGMT_CFG80211_DEAUTH
:
2566 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2568 case RX_MGMT_CFG80211_DISASSOC
:
2569 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2571 case RX_MGMT_CFG80211_RX_AUTH
:
2572 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2574 case RX_MGMT_CFG80211_RX_ASSOC
:
2575 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2577 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2578 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2581 WARN(1, "unexpected: %d", rma
);
2585 static void ieee80211_sta_timer(unsigned long data
)
2587 struct ieee80211_sub_if_data
*sdata
=
2588 (struct ieee80211_sub_if_data
*) data
;
2589 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2590 struct ieee80211_local
*local
= sdata
->local
;
2592 if (local
->quiescing
) {
2593 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2597 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2600 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2601 u8
*bssid
, u8 reason
)
2603 struct ieee80211_local
*local
= sdata
->local
;
2604 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2605 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2607 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2609 mutex_unlock(&ifmgd
->mtx
);
2612 * must be outside lock due to cfg80211,
2613 * but that's not a problem.
2615 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2617 mutex_lock(&local
->mtx
);
2618 ieee80211_recalc_idle(local
);
2619 mutex_unlock(&local
->mtx
);
2621 mutex_lock(&ifmgd
->mtx
);
2624 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2626 struct ieee80211_local
*local
= sdata
->local
;
2627 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2628 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2630 lockdep_assert_held(&ifmgd
->mtx
);
2632 if (WARN_ON_ONCE(!auth_data
))
2637 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2638 sdata_info(sdata
, "authentication with %pM timed out\n",
2639 auth_data
->bss
->bssid
);
2642 * Most likely AP is not in the range so remove the
2643 * bss struct for that AP.
2645 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2650 drv_mgd_prepare_tx(local
, sdata
);
2652 if (auth_data
->bss
->proberesp_ies
) {
2653 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2654 auth_data
->bss
->bssid
, auth_data
->tries
,
2655 IEEE80211_AUTH_MAX_TRIES
);
2657 auth_data
->expected_transaction
= 2;
2658 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2659 auth_data
->ie
, auth_data
->ie_len
,
2660 auth_data
->bss
->bssid
,
2661 auth_data
->bss
->bssid
, NULL
, 0, 0);
2665 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2666 auth_data
->bss
->bssid
, auth_data
->tries
,
2667 IEEE80211_AUTH_MAX_TRIES
);
2669 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2673 * Direct probe is sent to broadcast address as some APs
2674 * will not answer to direct packet in unassociated state.
2676 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2677 NULL
, 0, (u32
) -1, true, false);
2680 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2681 run_again(ifmgd
, auth_data
->timeout
);
2686 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2688 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2689 struct ieee80211_local
*local
= sdata
->local
;
2691 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2693 assoc_data
->tries
++;
2694 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2695 sdata_info(sdata
, "association with %pM timed out\n",
2696 assoc_data
->bss
->bssid
);
2699 * Most likely AP is not in the range so remove the
2700 * bss struct for that AP.
2702 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2707 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2708 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2709 IEEE80211_ASSOC_MAX_TRIES
);
2710 ieee80211_send_assoc(sdata
);
2712 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2713 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2718 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2720 struct ieee80211_local
*local
= sdata
->local
;
2721 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2723 mutex_lock(&ifmgd
->mtx
);
2725 if (ifmgd
->auth_data
&&
2726 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2727 if (ifmgd
->auth_data
->done
) {
2729 * ok ... we waited for assoc but userspace didn't,
2730 * so let's just kill the auth data
2732 ieee80211_destroy_auth_data(sdata
, false);
2733 } else if (ieee80211_probe_auth(sdata
)) {
2736 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2738 ieee80211_destroy_auth_data(sdata
, false);
2740 mutex_unlock(&ifmgd
->mtx
);
2741 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2742 mutex_lock(&ifmgd
->mtx
);
2744 } else if (ifmgd
->auth_data
)
2745 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2747 if (ifmgd
->assoc_data
&&
2748 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2749 if (!ifmgd
->assoc_data
->have_beacon
||
2750 ieee80211_do_assoc(sdata
)) {
2753 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2755 ieee80211_destroy_assoc_data(sdata
, false);
2757 mutex_unlock(&ifmgd
->mtx
);
2758 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2759 mutex_lock(&ifmgd
->mtx
);
2761 } else if (ifmgd
->assoc_data
)
2762 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2764 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2765 IEEE80211_STA_CONNECTION_POLL
) &&
2766 ifmgd
->associated
) {
2770 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2772 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2773 max_tries
= max_nullfunc_tries
;
2775 max_tries
= max_probe_tries
;
2777 /* ACK received for nullfunc probing frame */
2778 if (!ifmgd
->probe_send_count
)
2779 ieee80211_reset_ap_probe(sdata
);
2780 else if (ifmgd
->nullfunc_failed
) {
2781 if (ifmgd
->probe_send_count
< max_tries
) {
2783 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2784 bssid
, ifmgd
->probe_send_count
,
2786 ieee80211_mgd_probe_ap_send(sdata
);
2789 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2791 ieee80211_sta_connection_lost(sdata
, bssid
,
2792 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2794 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2795 run_again(ifmgd
, ifmgd
->probe_timeout
);
2796 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2798 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2799 bssid
, probe_wait_ms
);
2800 ieee80211_sta_connection_lost(sdata
, bssid
,
2801 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2802 } else if (ifmgd
->probe_send_count
< max_tries
) {
2804 "No probe response from AP %pM after %dms, try %d/%i\n",
2805 bssid
, probe_wait_ms
,
2806 ifmgd
->probe_send_count
, max_tries
);
2807 ieee80211_mgd_probe_ap_send(sdata
);
2810 * We actually lost the connection ... or did we?
2813 wiphy_debug(local
->hw
.wiphy
,
2814 "%s: No probe response from AP %pM"
2815 " after %dms, disconnecting.\n",
2817 bssid
, probe_wait_ms
);
2819 ieee80211_sta_connection_lost(sdata
, bssid
,
2820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2824 mutex_unlock(&ifmgd
->mtx
);
2826 mutex_lock(&local
->mtx
);
2827 ieee80211_recalc_idle(local
);
2828 mutex_unlock(&local
->mtx
);
2831 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2833 struct ieee80211_sub_if_data
*sdata
=
2834 (struct ieee80211_sub_if_data
*) data
;
2835 struct ieee80211_local
*local
= sdata
->local
;
2837 if (local
->quiescing
)
2840 ieee80211_queue_work(&sdata
->local
->hw
,
2841 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2844 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2846 struct ieee80211_sub_if_data
*sdata
=
2847 (struct ieee80211_sub_if_data
*) data
;
2848 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2849 struct ieee80211_local
*local
= sdata
->local
;
2851 if (local
->quiescing
)
2854 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2857 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2859 struct ieee80211_sub_if_data
*sdata
=
2860 container_of(work
, struct ieee80211_sub_if_data
,
2861 u
.mgd
.monitor_work
);
2863 ieee80211_mgd_probe_ap(sdata
, false);
2866 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2870 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2871 __ieee80211_stop_poll(sdata
);
2873 /* let's probe the connection once */
2874 flags
= sdata
->local
->hw
.flags
;
2875 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2876 ieee80211_queue_work(&sdata
->local
->hw
,
2877 &sdata
->u
.mgd
.monitor_work
);
2878 /* and do all the other regular work too */
2879 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2884 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2886 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2889 * we need to use atomic bitops for the running bits
2890 * only because both timers might fire at the same
2891 * time -- the code here is properly synchronised.
2894 cancel_work_sync(&ifmgd
->request_smps_work
);
2896 cancel_work_sync(&ifmgd
->monitor_work
);
2897 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2898 if (del_timer_sync(&ifmgd
->timer
))
2899 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2901 cancel_work_sync(&ifmgd
->chswitch_work
);
2902 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2903 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2905 /* these will just be re-established on connection */
2906 del_timer_sync(&ifmgd
->conn_mon_timer
);
2907 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2910 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2912 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2914 if (!ifmgd
->associated
)
2917 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2918 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2919 mutex_lock(&ifmgd
->mtx
);
2920 if (ifmgd
->associated
) {
2922 "driver requested disconnect after resume\n");
2923 ieee80211_sta_connection_lost(sdata
,
2924 ifmgd
->associated
->bssid
,
2925 WLAN_REASON_UNSPECIFIED
);
2926 mutex_unlock(&ifmgd
->mtx
);
2929 mutex_unlock(&ifmgd
->mtx
);
2932 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2933 add_timer(&ifmgd
->timer
);
2934 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2935 add_timer(&ifmgd
->chswitch_timer
);
2936 ieee80211_sta_reset_beacon_monitor(sdata
);
2938 mutex_lock(&sdata
->local
->mtx
);
2939 ieee80211_restart_sta_timer(sdata
);
2940 mutex_unlock(&sdata
->local
->mtx
);
2944 /* interface setup */
2945 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2947 struct ieee80211_if_managed
*ifmgd
;
2949 ifmgd
= &sdata
->u
.mgd
;
2950 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2951 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2952 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2953 ieee80211_beacon_connection_loss_work
);
2954 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2955 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2956 (unsigned long) sdata
);
2957 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2958 (unsigned long) sdata
);
2959 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2960 (unsigned long) sdata
);
2961 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2962 (unsigned long) sdata
);
2965 ifmgd
->powersave
= sdata
->wdev
.ps
;
2966 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
2967 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
2969 mutex_init(&ifmgd
->mtx
);
2971 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2972 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2974 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2977 /* scan finished notification */
2978 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2980 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2982 /* Restart STA timers */
2984 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2985 ieee80211_restart_sta_timer(sdata
);
2989 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2990 unsigned long data
, void *dummy
)
2992 s32 latency_usec
= (s32
) data
;
2993 struct ieee80211_local
*local
=
2994 container_of(nb
, struct ieee80211_local
,
2995 network_latency_notifier
);
2997 mutex_lock(&local
->iflist_mtx
);
2998 ieee80211_recalc_ps(local
, latency_usec
);
2999 mutex_unlock(&local
->iflist_mtx
);
3004 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3005 struct cfg80211_bss
*cbss
, bool assoc
)
3007 struct ieee80211_local
*local
= sdata
->local
;
3008 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3009 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3010 struct sta_info
*sta
= NULL
;
3011 bool have_sta
= false;
3014 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3015 const u8
*ht_oper_ie
;
3016 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3017 struct ieee80211_supported_band
*sband
;
3019 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3024 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3029 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3034 mutex_lock(&local
->mtx
);
3035 ieee80211_recalc_idle(sdata
->local
);
3036 mutex_unlock(&local
->mtx
);
3038 /* switch to the right channel */
3039 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3041 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3043 if (sband
->ht_cap
.ht_supported
) {
3044 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3045 cbss
->information_elements
,
3046 cbss
->len_information_elements
);
3047 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3048 ht_oper
= (void *)(ht_oper_ie
+ 2);
3052 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3053 cbss
->channel
->band
);
3054 /* check that channel matches the right operating channel */
3055 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3057 * It's possible that some APs are confused here;
3058 * Netgear WNDR3700 sometimes reports 4 higher than
3059 * the actual channel in association responses, but
3060 * since we look at probe response/beacon data here
3064 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3065 cbss
->channel
->center_freq
,
3066 ht_cfreq
, ht_oper
->primary_chan
,
3067 cbss
->channel
->band
);
3073 channel_type
= NL80211_CHAN_HT20
;
3075 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3076 switch (ht_oper
->ht_param
&
3077 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3078 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3079 channel_type
= NL80211_CHAN_HT40PLUS
;
3081 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3082 channel_type
= NL80211_CHAN_HT40MINUS
;
3088 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
3089 /* can only fail due to HT40+/- mismatch */
3090 channel_type
= NL80211_CHAN_HT20
;
3092 "disabling 40 MHz due to multi-vif mismatch\n");
3093 ifmgd
->flags
|= IEEE80211_STA_DISABLE_40MHZ
;
3094 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
3098 local
->oper_channel
= cbss
->channel
;
3099 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3102 u32 rates
= 0, basic_rates
= 0;
3103 bool have_higher_than_11mbit
;
3104 int min_rate
= INT_MAX
, min_rate_index
= -1;
3106 ieee80211_get_rates(sband
, bss
->supp_rates
,
3107 bss
->supp_rates_len
,
3108 &rates
, &basic_rates
,
3109 &have_higher_than_11mbit
,
3110 &min_rate
, &min_rate_index
);
3113 * This used to be a workaround for basic rates missing
3114 * in the association response frame. Now that we no
3115 * longer use the basic rates from there, it probably
3116 * doesn't happen any more, but keep the workaround so
3117 * in case some *other* APs are buggy in different ways
3118 * we can connect -- with a warning.
3120 if (!basic_rates
&& min_rate_index
>= 0) {
3122 "No basic rates, using min rate instead\n");
3123 basic_rates
= BIT(min_rate_index
);
3126 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3127 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3129 /* cf. IEEE 802.11 9.2.12 */
3130 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3131 have_higher_than_11mbit
)
3132 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3134 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3136 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3138 /* tell driver about BSSID and basic rates */
3139 ieee80211_bss_info_change_notify(sdata
,
3140 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3143 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3145 err
= sta_info_insert(sta
);
3149 "failed to insert STA entry for the AP (error %d)\n",
3154 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3160 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3161 struct cfg80211_auth_request
*req
)
3163 struct ieee80211_local
*local
= sdata
->local
;
3164 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3165 struct ieee80211_mgd_auth_data
*auth_data
;
3169 /* prepare auth data structure */
3171 switch (req
->auth_type
) {
3172 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3173 auth_alg
= WLAN_AUTH_OPEN
;
3175 case NL80211_AUTHTYPE_SHARED_KEY
:
3176 if (IS_ERR(local
->wep_tx_tfm
))
3178 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3180 case NL80211_AUTHTYPE_FT
:
3181 auth_alg
= WLAN_AUTH_FT
;
3183 case NL80211_AUTHTYPE_NETWORK_EAP
:
3184 auth_alg
= WLAN_AUTH_LEAP
;
3190 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3194 auth_data
->bss
= req
->bss
;
3196 if (req
->ie
&& req
->ie_len
) {
3197 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3198 auth_data
->ie_len
= req
->ie_len
;
3201 if (req
->key
&& req
->key_len
) {
3202 auth_data
->key_len
= req
->key_len
;
3203 auth_data
->key_idx
= req
->key_idx
;
3204 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3207 auth_data
->algorithm
= auth_alg
;
3209 /* try to authenticate/probe */
3211 mutex_lock(&ifmgd
->mtx
);
3213 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3214 ifmgd
->assoc_data
) {
3219 if (ifmgd
->auth_data
)
3220 ieee80211_destroy_auth_data(sdata
, false);
3222 /* prep auth_data so we don't go into idle on disassoc */
3223 ifmgd
->auth_data
= auth_data
;
3225 if (ifmgd
->associated
)
3226 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3228 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3230 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3234 err
= ieee80211_probe_auth(sdata
);
3236 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3240 /* hold our own reference */
3241 cfg80211_ref_bss(auth_data
->bss
);
3246 ifmgd
->auth_data
= NULL
;
3250 mutex_unlock(&ifmgd
->mtx
);
3255 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3256 struct cfg80211_assoc_request
*req
)
3258 struct ieee80211_local
*local
= sdata
->local
;
3259 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3260 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3261 struct ieee80211_mgd_assoc_data
*assoc_data
;
3262 struct ieee80211_supported_band
*sband
;
3263 const u8
*ssidie
, *ht_ie
;
3266 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3270 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3274 mutex_lock(&ifmgd
->mtx
);
3276 if (ifmgd
->associated
)
3277 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3279 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3284 if (ifmgd
->assoc_data
) {
3289 if (ifmgd
->auth_data
) {
3292 /* keep sta info, bssid if matching */
3293 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3294 ieee80211_destroy_auth_data(sdata
, match
);
3297 /* prepare assoc data */
3299 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3300 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3302 ifmgd
->beacon_crc_valid
= false;
3305 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3306 * We still associate in non-HT mode (11a/b/g) if any one of these
3307 * ciphers is configured as pairwise.
3308 * We can set this to true for non-11n hardware, that'll be checked
3309 * separately along with the peer capabilities.
3311 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3312 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3313 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3314 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3315 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3316 netdev_info(sdata
->dev
,
3317 "disabling HT due to WEP/TKIP use\n");
3321 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3322 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3324 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3325 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3326 if (!sband
->ht_cap
.ht_supported
||
3327 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3328 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3329 netdev_info(sdata
->dev
,
3330 "disabling HT as WMM/QoS is not supported\n");
3333 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3334 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3335 sizeof(ifmgd
->ht_capa_mask
));
3337 if (req
->ie
&& req
->ie_len
) {
3338 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3339 assoc_data
->ie_len
= req
->ie_len
;
3342 assoc_data
->bss
= req
->bss
;
3344 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3345 if (ifmgd
->powersave
)
3346 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3348 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3350 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3352 assoc_data
->capability
= req
->bss
->capability
;
3353 assoc_data
->wmm
= bss
->wmm_used
&&
3354 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3355 assoc_data
->supp_rates
= bss
->supp_rates
;
3356 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3358 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3359 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3360 assoc_data
->ap_ht_param
=
3361 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3363 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3365 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3366 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3367 assoc_data
->uapsd
= true;
3368 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3370 assoc_data
->uapsd
= false;
3371 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3374 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3375 assoc_data
->ssid_len
= ssidie
[1];
3377 if (req
->prev_bssid
)
3378 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3381 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3382 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3384 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3385 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3388 if (req
->crypto
.control_port
)
3389 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3391 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3393 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3394 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3396 /* kick off associate process */
3398 ifmgd
->assoc_data
= assoc_data
;
3400 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3404 if (!bss
->dtim_period
&&
3405 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3407 * Wait up to one beacon interval ...
3408 * should this be more if we miss one?
3410 sdata_info(sdata
, "waiting for beacon from %pM\n",
3412 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3414 assoc_data
->have_beacon
= true;
3415 assoc_data
->sent_assoc
= false;
3416 assoc_data
->timeout
= jiffies
;
3418 run_again(ifmgd
, assoc_data
->timeout
);
3420 if (bss
->corrupt_data
) {
3421 char *corrupt_type
= "data";
3422 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3423 if (bss
->corrupt_data
&
3424 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3425 corrupt_type
= "beacon and probe response";
3427 corrupt_type
= "beacon";
3428 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3429 corrupt_type
= "probe response";
3430 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3437 ifmgd
->assoc_data
= NULL
;
3441 mutex_unlock(&ifmgd
->mtx
);
3446 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3447 struct cfg80211_deauth_request
*req
)
3449 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3450 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3452 mutex_lock(&ifmgd
->mtx
);
3454 if (ifmgd
->auth_data
) {
3455 ieee80211_destroy_auth_data(sdata
, false);
3456 mutex_unlock(&ifmgd
->mtx
);
3461 "deauthenticating from %pM by local choice (reason=%d)\n",
3462 req
->bssid
, req
->reason_code
);
3464 if (ifmgd
->associated
&&
3465 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
))
3466 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3467 req
->reason_code
, true, frame_buf
);
3469 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3470 IEEE80211_STYPE_DEAUTH
,
3471 req
->reason_code
, true,
3473 mutex_unlock(&ifmgd
->mtx
);
3475 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3477 mutex_lock(&sdata
->local
->mtx
);
3478 ieee80211_recalc_idle(sdata
->local
);
3479 mutex_unlock(&sdata
->local
->mtx
);
3484 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3485 struct cfg80211_disassoc_request
*req
)
3487 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3489 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3491 mutex_lock(&ifmgd
->mtx
);
3494 * cfg80211 should catch this ... but it's racy since
3495 * we can receive a disassoc frame, process it, hand it
3496 * to cfg80211 while that's in a locked section already
3497 * trying to tell us that the user wants to disconnect.
3499 if (ifmgd
->associated
!= req
->bss
) {
3500 mutex_unlock(&ifmgd
->mtx
);
3505 "disassociating from %pM by local choice (reason=%d)\n",
3506 req
->bss
->bssid
, req
->reason_code
);
3508 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3509 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3510 req
->reason_code
, !req
->local_state_change
,
3512 mutex_unlock(&ifmgd
->mtx
);
3514 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3516 mutex_lock(&sdata
->local
->mtx
);
3517 ieee80211_recalc_idle(sdata
->local
);
3518 mutex_unlock(&sdata
->local
->mtx
);
3523 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3525 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3527 mutex_lock(&ifmgd
->mtx
);
3528 if (ifmgd
->assoc_data
)
3529 ieee80211_destroy_assoc_data(sdata
, false);
3530 if (ifmgd
->auth_data
)
3531 ieee80211_destroy_auth_data(sdata
, false);
3532 del_timer_sync(&ifmgd
->timer
);
3533 mutex_unlock(&ifmgd
->mtx
);
3536 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3537 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3540 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3542 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3544 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3546 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);