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
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
98 /* no action required */
101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH
,
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC
,
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH
,
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC
,
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
118 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
120 lockdep_assert_held(&ifmgd
->mtx
);
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
133 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
135 ASSERT_MGD_MTX(ifmgd
);
137 if (!timer_pending(&ifmgd
->timer
) ||
138 time_before(timeout
, ifmgd
->timer
.expires
))
139 mod_timer(&ifmgd
->timer
, timeout
);
142 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
144 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
147 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
150 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
151 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
154 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
158 if (unlikely(!sdata
->u
.mgd
.associated
))
161 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
164 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
165 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
167 ifmgd
->probe_send_count
= 0;
170 static int ecw2cw(int ecw
)
172 return (1 << ecw
) - 1;
175 static u32
ieee80211_config_ht_tx(struct ieee80211_sub_if_data
*sdata
,
176 struct ieee80211_ht_operation
*ht_oper
,
177 const u8
*bssid
, bool reconfig
)
179 struct ieee80211_local
*local
= sdata
->local
;
180 struct ieee80211_supported_band
*sband
;
181 struct ieee80211_chanctx_conf
*chanctx_conf
;
182 struct ieee80211_channel
*chan
;
183 struct sta_info
*sta
;
186 bool disable_40
= false;
189 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
190 if (WARN_ON(!chanctx_conf
)) {
194 chan
= chanctx_conf
->channel
;
196 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
198 switch (sdata
->vif
.bss_conf
.channel_type
) {
199 case NL80211_CHAN_HT40PLUS
:
200 if (chan
->flags
& IEEE80211_CHAN_NO_HT40PLUS
)
203 case NL80211_CHAN_HT40MINUS
:
204 if (chan
->flags
& IEEE80211_CHAN_NO_HT40MINUS
)
211 /* This can change during the lifetime of the BSS */
212 if (!(ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
215 mutex_lock(&local
->sta_mtx
);
216 sta
= sta_info_get(sdata
, bssid
);
220 if (sta
&& !sta
->supports_40mhz
)
223 if (sta
&& (!reconfig
||
224 (disable_40
!= !(sta
->sta
.ht_cap
.cap
&
225 IEEE80211_HT_CAP_SUP_WIDTH_20_40
)))) {
228 sta
->sta
.ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
230 sta
->sta
.ht_cap
.cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
232 rate_control_rate_update(local
, sband
, sta
,
233 IEEE80211_RC_BW_CHANGED
);
235 mutex_unlock(&local
->sta_mtx
);
237 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
239 /* if bss configuration changed store the new one */
240 if (!reconfig
|| (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
)) {
241 changed
|= BSS_CHANGED_HT
;
242 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
248 /* frame sending functions */
250 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
251 struct ieee80211_supported_band
*sband
,
257 for (i
= 0; i
< supp_rates_len
; i
++) {
258 int rate
= (supp_rates
[i
] & 0x7F) * 5;
260 for (j
= 0; j
< sband
->n_bitrates
; j
++)
261 if (sband
->bitrates
[j
].bitrate
== rate
) {
271 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
272 struct sk_buff
*skb
, u8 ap_ht_param
,
273 struct ieee80211_supported_band
*sband
,
274 struct ieee80211_channel
*channel
,
275 enum ieee80211_smps_mode smps
)
278 u32 flags
= channel
->flags
;
280 struct ieee80211_sta_ht_cap ht_cap
;
282 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
284 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
285 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
287 /* determine capability flags */
290 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
291 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
292 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
293 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
294 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
297 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
298 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
299 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
300 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
306 * If 40 MHz was disabled associate as though we weren't
307 * capable of 40 MHz -- some broken APs will never fall
308 * back to trying to transmit in 20 MHz.
310 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
311 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
312 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
315 /* set SM PS mode properly */
316 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
318 case IEEE80211_SMPS_AUTOMATIC
:
319 case IEEE80211_SMPS_NUM_MODES
:
321 case IEEE80211_SMPS_OFF
:
322 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
323 IEEE80211_HT_CAP_SM_PS_SHIFT
;
325 case IEEE80211_SMPS_STATIC
:
326 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
327 IEEE80211_HT_CAP_SM_PS_SHIFT
;
329 case IEEE80211_SMPS_DYNAMIC
:
330 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
331 IEEE80211_HT_CAP_SM_PS_SHIFT
;
335 /* reserve and fill IE */
336 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
337 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
340 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
342 struct ieee80211_supported_band
*sband
)
346 struct ieee80211_sta_vht_cap vht_cap
;
348 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
350 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
352 /* determine capability flags */
355 /* reserve and fill IE */
356 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_capabilities
) + 2);
357 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
360 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
362 struct ieee80211_local
*local
= sdata
->local
;
363 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
364 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
366 struct ieee80211_mgmt
*mgmt
;
368 size_t offset
= 0, noffset
;
369 int i
, count
, rates_len
, supp_rates_len
;
371 struct ieee80211_supported_band
*sband
;
372 struct ieee80211_chanctx_conf
*chanctx_conf
;
373 struct ieee80211_channel
*chan
;
376 lockdep_assert_held(&ifmgd
->mtx
);
379 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
380 if (WARN_ON(!chanctx_conf
)) {
384 chan
= chanctx_conf
->channel
;
386 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
388 if (assoc_data
->supp_rates_len
) {
390 * Get all rates supported by the device and the AP as
391 * some APs don't like getting a superset of their rates
392 * in the association request (e.g. D-Link DAP 1353 in
395 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
396 assoc_data
->supp_rates_len
,
400 * In case AP not provide any supported rates information
401 * before association, we send information element(s) with
402 * all rates that we support.
405 rates_len
= sband
->n_bitrates
;
408 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
409 sizeof(*mgmt
) + /* bit too much but doesn't matter */
410 2 + assoc_data
->ssid_len
+ /* SSID */
411 4 + rates_len
+ /* (extended) rates */
412 4 + /* power capability */
413 2 + 2 * sband
->n_channels
+ /* supported channels */
414 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
415 2 + sizeof(struct ieee80211_vht_capabilities
) + /* VHT */
416 assoc_data
->ie_len
+ /* extra IEs */
422 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
424 capab
= WLAN_CAPABILITY_ESS
;
426 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
427 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
428 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
429 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
430 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
433 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
434 capab
|= WLAN_CAPABILITY_PRIVACY
;
436 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
437 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
438 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
440 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
442 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
443 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
444 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
446 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
448 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
449 IEEE80211_STYPE_REASSOC_REQ
);
450 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
451 mgmt
->u
.reassoc_req
.listen_interval
=
452 cpu_to_le16(local
->hw
.conf
.listen_interval
);
453 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
457 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
458 IEEE80211_STYPE_ASSOC_REQ
);
459 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
460 mgmt
->u
.assoc_req
.listen_interval
=
461 cpu_to_le16(local
->hw
.conf
.listen_interval
);
465 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
466 *pos
++ = WLAN_EID_SSID
;
467 *pos
++ = assoc_data
->ssid_len
;
468 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
470 /* add all rates which were marked to be used above */
471 supp_rates_len
= rates_len
;
472 if (supp_rates_len
> 8)
475 pos
= skb_put(skb
, supp_rates_len
+ 2);
476 *pos
++ = WLAN_EID_SUPP_RATES
;
477 *pos
++ = supp_rates_len
;
480 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
481 if (BIT(i
) & rates
) {
482 int rate
= sband
->bitrates
[i
].bitrate
;
483 *pos
++ = (u8
) (rate
/ 5);
489 if (rates_len
> count
) {
490 pos
= skb_put(skb
, rates_len
- count
+ 2);
491 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
492 *pos
++ = rates_len
- count
;
494 for (i
++; i
< sband
->n_bitrates
; i
++) {
495 if (BIT(i
) & rates
) {
496 int rate
= sband
->bitrates
[i
].bitrate
;
497 *pos
++ = (u8
) (rate
/ 5);
502 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
503 /* 1. power capabilities */
504 pos
= skb_put(skb
, 4);
505 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
507 *pos
++ = 0; /* min tx power */
508 *pos
++ = chan
->max_power
; /* max tx power */
510 /* 2. supported channels */
511 /* TODO: get this in reg domain format */
512 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
513 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
514 *pos
++ = 2 * sband
->n_channels
;
515 for (i
= 0; i
< sband
->n_channels
; i
++) {
516 *pos
++ = ieee80211_frequency_to_channel(
517 sband
->channels
[i
].center_freq
);
518 *pos
++ = 1; /* one channel in the subband*/
522 /* if present, add any custom IEs that go before HT */
523 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
524 static const u8 before_ht
[] = {
527 WLAN_EID_EXT_SUPP_RATES
,
528 WLAN_EID_PWR_CAPABILITY
,
529 WLAN_EID_SUPPORTED_CHANNELS
,
532 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
533 WLAN_EID_MOBILITY_DOMAIN
,
534 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
536 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
537 before_ht
, ARRAY_SIZE(before_ht
),
539 pos
= skb_put(skb
, noffset
- offset
);
540 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
544 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
545 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
546 sband
, chan
, sdata
->smps_mode
);
548 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
549 ieee80211_add_vht_ie(sdata
, skb
, sband
);
551 /* if present, add any custom non-vendor IEs that go after HT */
552 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
553 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
556 pos
= skb_put(skb
, noffset
- offset
);
557 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
561 if (assoc_data
->wmm
) {
562 if (assoc_data
->uapsd
) {
563 qos_info
= ifmgd
->uapsd_queues
;
564 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
565 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
570 pos
= skb_put(skb
, 9);
571 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
572 *pos
++ = 7; /* len */
573 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
576 *pos
++ = 2; /* WME */
577 *pos
++ = 0; /* WME info */
578 *pos
++ = 1; /* WME ver */
582 /* add any remaining custom (i.e. vendor specific here) IEs */
583 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
584 noffset
= assoc_data
->ie_len
;
585 pos
= skb_put(skb
, noffset
- offset
);
586 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
589 drv_mgd_prepare_tx(local
, sdata
);
591 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
592 ieee80211_tx_skb(sdata
, skb
);
595 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
596 struct ieee80211_sub_if_data
*sdata
)
598 struct ieee80211_pspoll
*pspoll
;
601 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
605 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
606 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
608 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
609 ieee80211_tx_skb(sdata
, skb
);
612 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
613 struct ieee80211_sub_if_data
*sdata
,
617 struct ieee80211_hdr_3addr
*nullfunc
;
618 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
620 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
624 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
626 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
628 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
629 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
630 IEEE80211_STA_CONNECTION_POLL
))
631 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
633 ieee80211_tx_skb(sdata
, skb
);
636 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
637 struct ieee80211_sub_if_data
*sdata
)
640 struct ieee80211_hdr
*nullfunc
;
643 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
646 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
650 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
652 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
653 memset(nullfunc
, 0, 30);
654 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
655 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
656 nullfunc
->frame_control
= fc
;
657 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
658 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
659 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
660 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
662 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
663 ieee80211_tx_skb(sdata
, skb
);
666 /* spectrum management related things */
667 static void ieee80211_chswitch_work(struct work_struct
*work
)
669 struct ieee80211_sub_if_data
*sdata
=
670 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
671 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
673 if (!ieee80211_sdata_running(sdata
))
676 mutex_lock(&ifmgd
->mtx
);
677 if (!ifmgd
->associated
)
680 sdata
->local
->_oper_channel
= sdata
->local
->csa_channel
;
681 if (!sdata
->local
->ops
->channel_switch
) {
682 /* call "hw_config" only if doing sw channel switch */
683 ieee80211_hw_config(sdata
->local
,
684 IEEE80211_CONF_CHANGE_CHANNEL
);
686 /* update the device channel directly */
687 sdata
->local
->hw
.conf
.channel
= sdata
->local
->_oper_channel
;
690 /* XXX: shouldn't really modify cfg80211-owned data! */
691 ifmgd
->associated
->channel
= sdata
->local
->_oper_channel
;
693 /* XXX: wait for a beacon first? */
694 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
695 IEEE80211_QUEUE_STOP_REASON_CSA
);
697 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
698 mutex_unlock(&ifmgd
->mtx
);
701 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
703 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
704 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
706 trace_api_chswitch_done(sdata
, success
);
709 "driver channel switch failed, disconnecting\n");
710 ieee80211_queue_work(&sdata
->local
->hw
,
711 &ifmgd
->csa_connection_drop_work
);
713 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
716 EXPORT_SYMBOL(ieee80211_chswitch_done
);
718 static void ieee80211_chswitch_timer(unsigned long data
)
720 struct ieee80211_sub_if_data
*sdata
=
721 (struct ieee80211_sub_if_data
*) data
;
722 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
724 if (sdata
->local
->quiescing
) {
725 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
729 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
732 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
733 struct ieee80211_channel_sw_ie
*sw_elem
,
734 struct ieee80211_bss
*bss
,
737 struct cfg80211_bss
*cbss
=
738 container_of((void *)bss
, struct cfg80211_bss
, priv
);
739 struct ieee80211_channel
*new_ch
;
740 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
741 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
742 cbss
->channel
->band
);
743 struct ieee80211_chanctx
*chanctx
;
745 ASSERT_MGD_MTX(ifmgd
);
747 if (!ifmgd
->associated
)
750 if (sdata
->local
->scanning
)
753 /* Disregard subsequent beacons if we are already running a timer
756 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
759 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
760 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
762 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
763 ifmgd
->associated
->bssid
, new_freq
);
764 ieee80211_queue_work(&sdata
->local
->hw
,
765 &ifmgd
->csa_connection_drop_work
);
769 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
771 if (sdata
->local
->use_chanctx
) {
773 "not handling channel switch with channel contexts\n");
774 ieee80211_queue_work(&sdata
->local
->hw
,
775 &ifmgd
->csa_connection_drop_work
);
778 mutex_lock(&sdata
->local
->chanctx_mtx
);
779 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
780 mutex_unlock(&sdata
->local
->chanctx_mtx
);
783 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
784 struct ieee80211_chanctx
, conf
);
785 if (chanctx
->refcount
> 1) {
787 "channel switch with multiple interfaces on the same channel, disconnecting\n");
788 ieee80211_queue_work(&sdata
->local
->hw
,
789 &ifmgd
->csa_connection_drop_work
);
790 mutex_unlock(&sdata
->local
->chanctx_mtx
);
793 mutex_unlock(&sdata
->local
->chanctx_mtx
);
795 sdata
->local
->csa_channel
= new_ch
;
798 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
799 IEEE80211_QUEUE_STOP_REASON_CSA
);
801 if (sdata
->local
->ops
->channel_switch
) {
802 /* use driver's channel switch callback */
803 struct ieee80211_channel_switch ch_switch
= {
804 .timestamp
= timestamp
,
805 .block_tx
= sw_elem
->mode
,
807 .count
= sw_elem
->count
,
810 drv_channel_switch(sdata
->local
, &ch_switch
);
814 /* channel switch handled in software */
815 if (sw_elem
->count
<= 1)
816 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
818 mod_timer(&ifmgd
->chswitch_timer
,
819 TU_TO_EXP_TIME(sw_elem
->count
*
820 cbss
->beacon_interval
));
823 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
824 struct ieee80211_channel
*channel
,
825 const u8
*country_ie
, u8 country_ie_len
,
826 const u8
*pwr_constr_elem
)
828 struct ieee80211_country_ie_triplet
*triplet
;
829 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
830 int i
, chan_pwr
, chan_increment
, new_ap_level
;
831 bool have_chan_pwr
= false;
834 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
837 triplet
= (void *)(country_ie
+ 3);
840 switch (channel
->band
) {
844 case IEEE80211_BAND_2GHZ
:
845 case IEEE80211_BAND_60GHZ
:
848 case IEEE80211_BAND_5GHZ
:
854 while (country_ie_len
>= 3) {
855 u8 first_channel
= triplet
->chans
.first_channel
;
857 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
860 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
861 if (first_channel
+ i
* chan_increment
== chan
) {
862 have_chan_pwr
= true;
863 chan_pwr
= triplet
->chans
.max_power
;
878 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
880 if (sdata
->local
->ap_power_level
== new_ap_level
)
884 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
885 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
887 sdata
->local
->ap_power_level
= new_ap_level
;
888 ieee80211_hw_config(sdata
->local
, 0);
891 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
893 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
894 struct ieee80211_local
*local
= sdata
->local
;
895 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
897 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
898 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
899 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
901 local
->disable_dynamic_ps
= false;
902 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
904 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
906 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
908 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
909 struct ieee80211_local
*local
= sdata
->local
;
910 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
912 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
913 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
914 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
916 local
->disable_dynamic_ps
= true;
917 conf
->dynamic_ps_timeout
= 0;
918 del_timer_sync(&local
->dynamic_ps_timer
);
919 ieee80211_queue_work(&local
->hw
,
920 &local
->dynamic_ps_enable_work
);
922 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
925 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
926 struct ieee80211_sub_if_data
*sdata
)
928 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
931 * If we are scanning right now then the parameters will
932 * take effect when scan finishes.
937 if (conf
->dynamic_ps_timeout
> 0 &&
938 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
939 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
940 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
942 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
943 ieee80211_send_nullfunc(local
, sdata
, 1);
945 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
946 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
949 conf
->flags
|= IEEE80211_CONF_PS
;
950 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
954 static void ieee80211_change_ps(struct ieee80211_local
*local
)
956 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
958 if (local
->ps_sdata
) {
959 ieee80211_enable_ps(local
, local
->ps_sdata
);
960 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
961 conf
->flags
&= ~IEEE80211_CONF_PS
;
962 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
963 del_timer_sync(&local
->dynamic_ps_timer
);
964 cancel_work_sync(&local
->dynamic_ps_enable_work
);
968 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
970 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
971 struct sta_info
*sta
= NULL
;
972 bool authorized
= false;
980 if (!mgd
->associated
)
983 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
984 IEEE80211_STA_CONNECTION_POLL
))
988 sta
= sta_info_get(sdata
, mgd
->bssid
);
990 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
996 /* need to hold RTNL or interface lock */
997 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
999 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1003 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1004 local
->ps_sdata
= NULL
;
1008 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1009 if (!ieee80211_sdata_running(sdata
))
1011 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1012 /* If an AP vif is found, then disable PS
1013 * by setting the count to zero thereby setting
1019 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1025 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1026 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1030 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1032 beaconint_us
= ieee80211_tu_to_usec(
1033 found
->vif
.bss_conf
.beacon_int
);
1035 timeout
= local
->dynamic_ps_forced_timeout
;
1038 * Go to full PSM if the user configures a very low
1039 * latency requirement.
1040 * The 2000 second value is there for compatibility
1041 * until the PM_QOS_NETWORK_LATENCY is configured
1044 if (latency
> (1900 * USEC_PER_MSEC
) &&
1045 latency
!= (2000 * USEC_PER_SEC
))
1050 local
->dynamic_ps_user_timeout
= timeout
;
1051 if (!local
->disable_dynamic_ps
)
1052 conf
->dynamic_ps_timeout
=
1053 local
->dynamic_ps_user_timeout
;
1055 if (beaconint_us
> latency
) {
1056 local
->ps_sdata
= NULL
;
1058 struct ieee80211_bss
*bss
;
1062 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1063 dtimper
= bss
->dtim_period
;
1065 /* If the TIM IE is invalid, pretend the value is 1 */
1068 else if (dtimper
> 1)
1069 maxslp
= min_t(int, dtimper
,
1070 latency
/ beaconint_us
);
1072 local
->hw
.conf
.max_sleep_period
= maxslp
;
1073 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1074 local
->ps_sdata
= found
;
1077 local
->ps_sdata
= NULL
;
1080 ieee80211_change_ps(local
);
1083 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1085 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1087 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1088 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1089 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1093 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1095 struct ieee80211_local
*local
=
1096 container_of(work
, struct ieee80211_local
,
1097 dynamic_ps_disable_work
);
1099 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1100 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1101 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1104 ieee80211_wake_queues_by_reason(&local
->hw
,
1105 IEEE80211_QUEUE_STOP_REASON_PS
);
1108 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1110 struct ieee80211_local
*local
=
1111 container_of(work
, struct ieee80211_local
,
1112 dynamic_ps_enable_work
);
1113 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1114 struct ieee80211_if_managed
*ifmgd
;
1115 unsigned long flags
;
1118 /* can only happen when PS was just disabled anyway */
1122 ifmgd
= &sdata
->u
.mgd
;
1124 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1127 if (!local
->disable_dynamic_ps
&&
1128 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1129 /* don't enter PS if TX frames are pending */
1130 if (drv_tx_frames_pending(local
)) {
1131 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1133 local
->hw
.conf
.dynamic_ps_timeout
));
1138 * transmission can be stopped by others which leads to
1139 * dynamic_ps_timer expiry. Postpone the ps timer if it
1140 * is not the actual idle state.
1142 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1143 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1144 if (local
->queue_stop_reasons
[q
]) {
1145 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1147 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1149 local
->hw
.conf
.dynamic_ps_timeout
));
1153 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1156 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1157 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1158 netif_tx_stop_all_queues(sdata
->dev
);
1160 if (drv_tx_frames_pending(local
))
1161 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1163 local
->hw
.conf
.dynamic_ps_timeout
));
1165 ieee80211_send_nullfunc(local
, sdata
, 1);
1166 /* Flush to get the tx status of nullfunc frame */
1167 drv_flush(local
, false);
1171 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1172 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1173 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1174 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1175 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1176 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1179 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1180 netif_tx_wake_all_queues(sdata
->dev
);
1183 void ieee80211_dynamic_ps_timer(unsigned long data
)
1185 struct ieee80211_local
*local
= (void *) data
;
1187 if (local
->quiescing
|| local
->suspended
)
1190 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1194 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1195 struct ieee80211_sub_if_data
*sdata
,
1196 u8
*wmm_param
, size_t wmm_param_len
)
1198 struct ieee80211_tx_queue_params params
;
1199 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1202 u8
*pos
, uapsd_queues
= 0;
1204 if (!local
->ops
->conf_tx
)
1207 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1213 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1216 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1217 uapsd_queues
= ifmgd
->uapsd_queues
;
1219 count
= wmm_param
[6] & 0x0f;
1220 if (count
== ifmgd
->wmm_last_param_set
)
1222 ifmgd
->wmm_last_param_set
= count
;
1224 pos
= wmm_param
+ 8;
1225 left
= wmm_param_len
- 8;
1227 memset(¶ms
, 0, sizeof(params
));
1230 for (; left
>= 4; left
-= 4, pos
+= 4) {
1231 int aci
= (pos
[0] >> 5) & 0x03;
1232 int acm
= (pos
[0] >> 4) & 0x01;
1240 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1241 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1247 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1248 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1254 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1255 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1262 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1263 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1268 params
.aifs
= pos
[0] & 0x0f;
1269 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1270 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1271 params
.txop
= get_unaligned_le16(pos
+ 2);
1272 params
.uapsd
= uapsd
;
1275 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1277 params
.aifs
, params
.cw_min
, params
.cw_max
,
1278 params
.txop
, params
.uapsd
);
1279 sdata
->tx_conf
[queue
] = params
;
1280 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1282 "failed to set TX queue parameters for queue %d\n",
1286 /* enable WMM or activate new settings */
1287 sdata
->vif
.bss_conf
.qos
= true;
1291 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1293 lockdep_assert_held(&sdata
->local
->mtx
);
1295 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1296 IEEE80211_STA_BEACON_POLL
);
1297 ieee80211_run_deferred_scan(sdata
->local
);
1300 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1302 mutex_lock(&sdata
->local
->mtx
);
1303 __ieee80211_stop_poll(sdata
);
1304 mutex_unlock(&sdata
->local
->mtx
);
1307 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1308 u16 capab
, bool erp_valid
, u8 erp
)
1310 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1312 bool use_protection
;
1313 bool use_short_preamble
;
1314 bool use_short_slot
;
1317 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1318 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1320 use_protection
= false;
1321 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1324 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1325 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1326 use_short_slot
= true;
1328 if (use_protection
!= bss_conf
->use_cts_prot
) {
1329 bss_conf
->use_cts_prot
= use_protection
;
1330 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1333 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1334 bss_conf
->use_short_preamble
= use_short_preamble
;
1335 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1338 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1339 bss_conf
->use_short_slot
= use_short_slot
;
1340 changed
|= BSS_CHANGED_ERP_SLOT
;
1346 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1347 struct cfg80211_bss
*cbss
,
1348 u32 bss_info_changed
)
1350 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1351 struct ieee80211_local
*local
= sdata
->local
;
1352 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1354 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1355 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1356 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1358 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1359 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1361 sdata
->u
.mgd
.associated
= cbss
;
1362 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1364 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1366 /* just to be sure */
1367 ieee80211_stop_poll(sdata
);
1369 ieee80211_led_assoc(local
, 1);
1371 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1372 bss_conf
->dtim_period
= bss
->dtim_period
;
1374 bss_conf
->dtim_period
= 0;
1376 bss_conf
->assoc
= 1;
1378 /* Tell the driver to monitor connection quality (if supported) */
1379 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1380 bss_conf
->cqm_rssi_thold
)
1381 bss_info_changed
|= BSS_CHANGED_CQM
;
1383 /* Enable ARP filtering */
1384 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1385 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1386 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1389 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1391 mutex_lock(&local
->iflist_mtx
);
1392 ieee80211_recalc_ps(local
, -1);
1393 mutex_unlock(&local
->iflist_mtx
);
1395 ieee80211_recalc_smps(sdata
);
1396 ieee80211_recalc_ps_vif(sdata
);
1398 netif_tx_start_all_queues(sdata
->dev
);
1399 netif_carrier_on(sdata
->dev
);
1402 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1403 u16 stype
, u16 reason
, bool tx
,
1406 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1407 struct ieee80211_local
*local
= sdata
->local
;
1408 struct sta_info
*sta
;
1411 ASSERT_MGD_MTX(ifmgd
);
1413 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1416 if (WARN_ON(!ifmgd
->associated
))
1419 ieee80211_stop_poll(sdata
);
1421 ifmgd
->associated
= NULL
;
1424 * we need to commit the associated = NULL change because the
1425 * scan code uses that to determine whether this iface should
1426 * go to/wake up from powersave or not -- and could otherwise
1427 * wake the queues erroneously.
1432 * Thus, we can only afterwards stop the queues -- to account
1433 * for the case where another CPU is finishing a scan at this
1434 * time -- we don't want the scan code to enable queues.
1437 netif_tx_stop_all_queues(sdata
->dev
);
1438 netif_carrier_off(sdata
->dev
);
1440 mutex_lock(&local
->sta_mtx
);
1441 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1443 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1444 ieee80211_sta_tear_down_BA_sessions(sta
, false);
1446 mutex_unlock(&local
->sta_mtx
);
1449 * if we want to get out of ps before disassoc (why?) we have
1450 * to do it before sending disassoc, as otherwise the null-packet
1453 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1454 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1455 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1457 local
->ps_sdata
= NULL
;
1459 /* disable per-vif ps */
1460 ieee80211_recalc_ps_vif(sdata
);
1462 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1464 drv_flush(local
, false);
1466 /* deauthenticate/disassociate now */
1467 if (tx
|| frame_buf
)
1468 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1469 reason
, tx
, frame_buf
);
1471 /* flush out frame */
1473 drv_flush(local
, false);
1475 /* clear bssid only after building the needed mgmt frames */
1476 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1478 /* remove AP and TDLS peers */
1479 sta_info_flush(local
, sdata
);
1481 /* finally reset all BSS / config parameters */
1482 changed
|= ieee80211_reset_erp_info(sdata
);
1484 ieee80211_led_assoc(local
, 0);
1485 changed
|= BSS_CHANGED_ASSOC
;
1486 sdata
->vif
.bss_conf
.assoc
= false;
1488 /* on the next assoc, re-program HT parameters */
1489 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1490 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1492 local
->ap_power_level
= 0;
1494 del_timer_sync(&local
->dynamic_ps_timer
);
1495 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1497 /* Disable ARP filtering */
1498 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1499 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1500 changed
|= BSS_CHANGED_ARP_FILTER
;
1503 sdata
->vif
.bss_conf
.qos
= false;
1504 changed
|= BSS_CHANGED_QOS
;
1506 /* The BSSID (not really interesting) and HT changed */
1507 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1508 ieee80211_bss_info_change_notify(sdata
, changed
);
1510 ieee80211_vif_release_channel(sdata
);
1512 /* disassociated - set to defaults now */
1513 ieee80211_set_wmm_default(sdata
, false);
1515 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1516 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1517 del_timer_sync(&sdata
->u
.mgd
.timer
);
1518 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1520 sdata
->u
.mgd
.timers_running
= 0;
1523 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1524 struct ieee80211_hdr
*hdr
)
1527 * We can postpone the mgd.timer whenever receiving unicast frames
1528 * from AP because we know that the connection is working both ways
1529 * at that time. But multicast frames (and hence also beacons) must
1530 * be ignored here, because we need to trigger the timer during
1531 * data idle periods for sending the periodic probe request to the
1532 * AP we're connected to.
1534 if (is_multicast_ether_addr(hdr
->addr1
))
1537 ieee80211_sta_reset_conn_monitor(sdata
);
1540 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1542 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1543 struct ieee80211_local
*local
= sdata
->local
;
1545 mutex_lock(&local
->mtx
);
1546 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1547 IEEE80211_STA_CONNECTION_POLL
))) {
1548 mutex_unlock(&local
->mtx
);
1552 __ieee80211_stop_poll(sdata
);
1554 mutex_lock(&local
->iflist_mtx
);
1555 ieee80211_recalc_ps(local
, -1);
1556 mutex_unlock(&local
->iflist_mtx
);
1558 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1562 * We've received a probe response, but are not sure whether
1563 * we have or will be receiving any beacons or data, so let's
1564 * schedule the timers again, just in case.
1566 ieee80211_sta_reset_beacon_monitor(sdata
);
1568 mod_timer(&ifmgd
->conn_mon_timer
,
1569 round_jiffies_up(jiffies
+
1570 IEEE80211_CONNECTION_IDLE_TIME
));
1572 mutex_unlock(&local
->mtx
);
1575 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1576 struct ieee80211_hdr
*hdr
, bool ack
)
1578 if (!ieee80211_is_data(hdr
->frame_control
))
1582 ieee80211_sta_reset_conn_monitor(sdata
);
1584 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1585 sdata
->u
.mgd
.probe_send_count
> 0) {
1587 sdata
->u
.mgd
.probe_send_count
= 0;
1589 sdata
->u
.mgd
.nullfunc_failed
= true;
1590 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1594 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1596 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1598 u8
*dst
= ifmgd
->associated
->bssid
;
1599 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1602 * Try sending broadcast probe requests for the last three
1603 * probe requests after the first ones failed since some
1604 * buggy APs only support broadcast probe requests.
1606 if (ifmgd
->probe_send_count
>= unicast_limit
)
1610 * When the hardware reports an accurate Tx ACK status, it's
1611 * better to send a nullfunc frame instead of a probe request,
1612 * as it will kick us off the AP quickly if we aren't associated
1613 * anymore. The timeout will be reset if the frame is ACKed by
1616 ifmgd
->probe_send_count
++;
1618 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1619 ifmgd
->nullfunc_failed
= false;
1620 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1624 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1625 if (WARN_ON_ONCE(ssid
== NULL
))
1630 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1631 0, (u32
) -1, true, false,
1632 ifmgd
->associated
->channel
, false);
1635 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1636 run_again(ifmgd
, ifmgd
->probe_timeout
);
1637 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1638 drv_flush(sdata
->local
, false);
1641 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1644 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1645 bool already
= false;
1647 if (!ieee80211_sdata_running(sdata
))
1650 mutex_lock(&ifmgd
->mtx
);
1652 if (!ifmgd
->associated
)
1655 mutex_lock(&sdata
->local
->mtx
);
1657 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1658 mutex_unlock(&sdata
->local
->mtx
);
1663 mlme_dbg_ratelimited(sdata
,
1664 "detected beacon loss from AP - sending probe request\n");
1666 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1667 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1670 * The driver/our work has already reported this event or the
1671 * connection monitoring has kicked in and we have already sent
1672 * a probe request. Or maybe the AP died and the driver keeps
1673 * reporting until we disassociate...
1675 * In either case we have to ignore the current call to this
1676 * function (except for setting the correct probe reason bit)
1677 * because otherwise we would reset the timer every time and
1678 * never check whether we received a probe response!
1680 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1681 IEEE80211_STA_CONNECTION_POLL
))
1685 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1687 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1689 mutex_unlock(&sdata
->local
->mtx
);
1694 mutex_lock(&sdata
->local
->iflist_mtx
);
1695 ieee80211_recalc_ps(sdata
->local
, -1);
1696 mutex_unlock(&sdata
->local
->iflist_mtx
);
1698 ifmgd
->probe_send_count
= 0;
1699 ieee80211_mgd_probe_ap_send(sdata
);
1701 mutex_unlock(&ifmgd
->mtx
);
1704 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1705 struct ieee80211_vif
*vif
)
1707 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1708 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1709 struct cfg80211_bss
*cbss
;
1710 struct sk_buff
*skb
;
1714 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1717 ASSERT_MGD_MTX(ifmgd
);
1719 if (ifmgd
->associated
)
1720 cbss
= ifmgd
->associated
;
1721 else if (ifmgd
->auth_data
)
1722 cbss
= ifmgd
->auth_data
->bss
;
1723 else if (ifmgd
->assoc_data
)
1724 cbss
= ifmgd
->assoc_data
->bss
;
1728 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1729 if (WARN_ON_ONCE(ssid
== NULL
))
1734 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1735 (u32
) -1, cbss
->channel
,
1741 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1743 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
,
1744 bool transmit_frame
)
1746 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1747 struct ieee80211_local
*local
= sdata
->local
;
1748 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1750 mutex_lock(&ifmgd
->mtx
);
1751 if (!ifmgd
->associated
) {
1752 mutex_unlock(&ifmgd
->mtx
);
1756 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1757 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1758 transmit_frame
, frame_buf
);
1759 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1760 mutex_unlock(&ifmgd
->mtx
);
1763 * must be outside lock due to cfg80211,
1764 * but that's not a problem.
1766 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
1768 mutex_lock(&local
->mtx
);
1769 ieee80211_recalc_idle(local
);
1770 mutex_unlock(&local
->mtx
);
1773 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1775 struct ieee80211_sub_if_data
*sdata
=
1776 container_of(work
, struct ieee80211_sub_if_data
,
1777 u
.mgd
.beacon_connection_loss_work
);
1778 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1779 struct sta_info
*sta
;
1781 if (ifmgd
->associated
) {
1783 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1785 sta
->beacon_loss_count
++;
1789 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
) {
1790 sdata_info(sdata
, "Connection to AP %pM lost\n",
1792 __ieee80211_disconnect(sdata
, false);
1794 ieee80211_mgd_probe_ap(sdata
, true);
1798 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
1800 struct ieee80211_sub_if_data
*sdata
=
1801 container_of(work
, struct ieee80211_sub_if_data
,
1802 u
.mgd
.csa_connection_drop_work
);
1804 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1805 IEEE80211_QUEUE_STOP_REASON_CSA
);
1806 __ieee80211_disconnect(sdata
, true);
1809 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1811 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1812 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1814 trace_api_beacon_loss(sdata
);
1816 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1817 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1819 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1821 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1823 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1824 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1826 trace_api_connection_loss(sdata
);
1828 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1829 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1831 EXPORT_SYMBOL(ieee80211_connection_loss
);
1834 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1837 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1839 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1842 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1844 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1845 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1846 ieee80211_vif_release_channel(sdata
);
1849 cfg80211_put_bss(auth_data
->bss
);
1851 sdata
->u
.mgd
.auth_data
= NULL
;
1854 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1855 struct ieee80211_mgmt
*mgmt
, size_t len
)
1857 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1859 struct ieee802_11_elems elems
;
1861 pos
= mgmt
->u
.auth
.variable
;
1862 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1863 if (!elems
.challenge
)
1865 auth_data
->expected_transaction
= 4;
1866 drv_mgd_prepare_tx(sdata
->local
, sdata
);
1867 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1868 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1869 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1870 auth_data
->key
, auth_data
->key_len
,
1871 auth_data
->key_idx
);
1874 static enum rx_mgmt_action __must_check
1875 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1876 struct ieee80211_mgmt
*mgmt
, size_t len
)
1878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1880 u16 auth_alg
, auth_transaction
, status_code
;
1881 struct sta_info
*sta
;
1883 lockdep_assert_held(&ifmgd
->mtx
);
1886 return RX_MGMT_NONE
;
1888 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1889 return RX_MGMT_NONE
;
1891 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1893 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
1894 return RX_MGMT_NONE
;
1896 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1897 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1898 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1900 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1901 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1902 return RX_MGMT_NONE
;
1904 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1905 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
1906 mgmt
->sa
, status_code
);
1907 ieee80211_destroy_auth_data(sdata
, false);
1908 return RX_MGMT_CFG80211_RX_AUTH
;
1911 switch (ifmgd
->auth_data
->algorithm
) {
1912 case WLAN_AUTH_OPEN
:
1913 case WLAN_AUTH_LEAP
:
1916 case WLAN_AUTH_SHARED_KEY
:
1917 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1918 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1919 /* need another frame */
1920 return RX_MGMT_NONE
;
1924 WARN_ONCE(1, "invalid auth alg %d",
1925 ifmgd
->auth_data
->algorithm
);
1926 return RX_MGMT_NONE
;
1929 sdata_info(sdata
, "authenticated\n");
1930 ifmgd
->auth_data
->done
= true;
1931 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1932 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1934 /* move station state to auth */
1935 mutex_lock(&sdata
->local
->sta_mtx
);
1936 sta
= sta_info_get(sdata
, bssid
);
1938 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1941 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1942 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
1945 mutex_unlock(&sdata
->local
->sta_mtx
);
1947 return RX_MGMT_CFG80211_RX_AUTH
;
1949 mutex_unlock(&sdata
->local
->sta_mtx
);
1950 /* ignore frame -- wait for timeout */
1951 return RX_MGMT_NONE
;
1955 static enum rx_mgmt_action __must_check
1956 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1957 struct ieee80211_mgmt
*mgmt
, size_t len
)
1959 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1960 const u8
*bssid
= NULL
;
1963 lockdep_assert_held(&ifmgd
->mtx
);
1966 return RX_MGMT_NONE
;
1968 if (!ifmgd
->associated
||
1969 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1970 return RX_MGMT_NONE
;
1972 bssid
= ifmgd
->associated
->bssid
;
1974 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1976 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
1977 bssid
, reason_code
);
1979 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1981 mutex_lock(&sdata
->local
->mtx
);
1982 ieee80211_recalc_idle(sdata
->local
);
1983 mutex_unlock(&sdata
->local
->mtx
);
1985 return RX_MGMT_CFG80211_DEAUTH
;
1989 static enum rx_mgmt_action __must_check
1990 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1991 struct ieee80211_mgmt
*mgmt
, size_t len
)
1993 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1996 lockdep_assert_held(&ifmgd
->mtx
);
1999 return RX_MGMT_NONE
;
2001 if (!ifmgd
->associated
||
2002 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2003 return RX_MGMT_NONE
;
2005 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2007 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2008 mgmt
->sa
, reason_code
);
2010 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2012 mutex_lock(&sdata
->local
->mtx
);
2013 ieee80211_recalc_idle(sdata
->local
);
2014 mutex_unlock(&sdata
->local
->mtx
);
2016 return RX_MGMT_CFG80211_DISASSOC
;
2019 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2020 u8
*supp_rates
, unsigned int supp_rates_len
,
2021 u32
*rates
, u32
*basic_rates
,
2022 bool *have_higher_than_11mbit
,
2023 int *min_rate
, int *min_rate_index
)
2027 for (i
= 0; i
< supp_rates_len
; i
++) {
2028 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2029 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2032 *have_higher_than_11mbit
= true;
2035 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2036 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2038 * Note: Even through the membership selector and the basic
2039 * rate flag share the same bit, they are not exactly
2042 if (!!(supp_rates
[i
] & 0x80) &&
2043 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2046 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2047 if (sband
->bitrates
[j
].bitrate
== rate
) {
2050 *basic_rates
|= BIT(j
);
2051 if (rate
< *min_rate
) {
2053 *min_rate_index
= j
;
2061 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2064 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2066 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2069 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2071 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2072 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2073 ieee80211_vif_release_channel(sdata
);
2077 sdata
->u
.mgd
.assoc_data
= NULL
;
2080 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2081 struct cfg80211_bss
*cbss
,
2082 struct ieee80211_mgmt
*mgmt
, size_t len
)
2084 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2085 struct ieee80211_local
*local
= sdata
->local
;
2086 struct ieee80211_supported_band
*sband
;
2087 struct sta_info
*sta
;
2089 u16 capab_info
, aid
;
2090 struct ieee802_11_elems elems
;
2091 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2095 /* AssocResp and ReassocResp have identical structure */
2097 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2098 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2100 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2101 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2103 aid
&= ~(BIT(15) | BIT(14));
2105 ifmgd
->broken_ap
= false;
2107 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2108 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2111 ifmgd
->broken_ap
= true;
2114 pos
= mgmt
->u
.assoc_resp
.variable
;
2115 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2117 if (!elems
.supp_rates
) {
2118 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2124 mutex_lock(&sdata
->local
->sta_mtx
);
2126 * station info was already allocated and inserted before
2127 * the association and should be available to us
2129 sta
= sta_info_get(sdata
, cbss
->bssid
);
2130 if (WARN_ON(!sta
)) {
2131 mutex_unlock(&sdata
->local
->sta_mtx
);
2135 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2137 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2138 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2139 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2141 sta
->supports_40mhz
=
2142 sta
->sta
.ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
2144 rate_control_rate_init(sta
);
2146 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2147 set_sta_flag(sta
, WLAN_STA_MFP
);
2149 if (elems
.wmm_param
)
2150 set_sta_flag(sta
, WLAN_STA_WME
);
2152 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2154 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2155 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2156 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2159 "failed to move station %pM to desired state\n",
2161 WARN_ON(__sta_info_destroy(sta
));
2162 mutex_unlock(&sdata
->local
->sta_mtx
);
2166 mutex_unlock(&sdata
->local
->sta_mtx
);
2169 * Always handle WMM once after association regardless
2170 * of the first value the AP uses. Setting -1 here has
2171 * that effect because the AP values is an unsigned
2174 ifmgd
->wmm_last_param_set
= -1;
2176 if (elems
.wmm_param
)
2177 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2178 elems
.wmm_param_len
);
2180 ieee80211_set_wmm_default(sdata
, false);
2181 changed
|= BSS_CHANGED_QOS
;
2183 if (elems
.ht_operation
&& elems
.wmm_param
&&
2184 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2185 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2186 cbss
->bssid
, false);
2188 /* set AID and assoc capability,
2189 * ieee80211_set_associated() will tell the driver */
2190 bss_conf
->aid
= aid
;
2191 bss_conf
->assoc_capability
= capab_info
;
2192 ieee80211_set_associated(sdata
, cbss
, changed
);
2195 * If we're using 4-addr mode, let the AP know that we're
2196 * doing so, so that it can create the STA VLAN on its side
2198 if (ifmgd
->use_4addr
)
2199 ieee80211_send_4addr_nullfunc(local
, sdata
);
2202 * Start timer to probe the connection to the AP now.
2203 * Also start the timer that will detect beacon loss.
2205 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2206 ieee80211_sta_reset_beacon_monitor(sdata
);
2211 static enum rx_mgmt_action __must_check
2212 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2213 struct ieee80211_mgmt
*mgmt
, size_t len
,
2214 struct cfg80211_bss
**bss
)
2216 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2217 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2218 u16 capab_info
, status_code
, aid
;
2219 struct ieee802_11_elems elems
;
2223 lockdep_assert_held(&ifmgd
->mtx
);
2226 return RX_MGMT_NONE
;
2227 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2228 return RX_MGMT_NONE
;
2231 * AssocResp and ReassocResp have identical structure, so process both
2232 * of them in this function.
2236 return RX_MGMT_NONE
;
2238 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2239 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2240 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2241 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2244 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2245 reassoc
? "Rea" : "A", mgmt
->sa
,
2246 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2248 pos
= mgmt
->u
.assoc_resp
.variable
;
2249 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2251 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2252 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2253 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2255 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2256 ms
= tu
* 1024 / 1000;
2258 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2260 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2261 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2262 run_again(ifmgd
, assoc_data
->timeout
);
2263 return RX_MGMT_NONE
;
2266 *bss
= assoc_data
->bss
;
2268 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2269 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2270 mgmt
->sa
, status_code
);
2271 ieee80211_destroy_assoc_data(sdata
, false);
2273 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2274 /* oops -- internal error -- send timeout for now */
2275 ieee80211_destroy_assoc_data(sdata
, false);
2276 cfg80211_put_bss(*bss
);
2277 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2279 sdata_info(sdata
, "associated\n");
2282 * destroy assoc_data afterwards, as otherwise an idle
2283 * recalc after assoc_data is NULL but before associated
2284 * is set can cause the interface to go idle
2286 ieee80211_destroy_assoc_data(sdata
, true);
2289 return RX_MGMT_CFG80211_RX_ASSOC
;
2291 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2292 struct ieee80211_mgmt
*mgmt
,
2294 struct ieee80211_rx_status
*rx_status
,
2295 struct ieee802_11_elems
*elems
,
2298 struct ieee80211_local
*local
= sdata
->local
;
2300 struct ieee80211_bss
*bss
;
2301 struct ieee80211_channel
*channel
;
2302 bool need_ps
= false;
2304 if (sdata
->u
.mgd
.associated
&&
2305 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) {
2306 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2307 /* not previously set so we may need to recalc */
2308 need_ps
= !bss
->dtim_period
;
2311 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2312 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2315 freq
= rx_status
->freq
;
2317 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2319 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2322 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2325 ieee80211_rx_bss_put(local
, bss
);
2327 if (!sdata
->u
.mgd
.associated
)
2331 mutex_lock(&local
->iflist_mtx
);
2332 ieee80211_recalc_ps(local
, -1);
2333 mutex_unlock(&local
->iflist_mtx
);
2336 if (elems
->ch_switch_ie
&&
2337 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2338 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2339 bss
, rx_status
->mactime
);
2343 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2344 struct sk_buff
*skb
)
2346 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2347 struct ieee80211_if_managed
*ifmgd
;
2348 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2349 size_t baselen
, len
= skb
->len
;
2350 struct ieee802_11_elems elems
;
2352 ifmgd
= &sdata
->u
.mgd
;
2354 ASSERT_MGD_MTX(ifmgd
);
2356 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2357 return; /* ignore ProbeResp to foreign address */
2359 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2363 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2366 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2368 if (ifmgd
->associated
&&
2369 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2370 ieee80211_reset_ap_probe(sdata
);
2372 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2373 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2374 /* got probe response, continue with auth */
2375 sdata_info(sdata
, "direct probe responded\n");
2376 ifmgd
->auth_data
->tries
= 0;
2377 ifmgd
->auth_data
->timeout
= jiffies
;
2378 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2383 * This is the canonical list of information elements we care about,
2384 * the filter code also gives us all changes to the Microsoft OUI
2385 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2387 * We implement beacon filtering in software since that means we can
2388 * avoid processing the frame here and in cfg80211, and userspace
2389 * will not be able to tell whether the hardware supports it or not.
2391 * XXX: This list needs to be dynamic -- userspace needs to be able to
2392 * add items it requires. It also needs to be able to tell us to
2393 * look out for other vendor IEs.
2395 static const u64 care_about_ies
=
2396 (1ULL << WLAN_EID_COUNTRY
) |
2397 (1ULL << WLAN_EID_ERP_INFO
) |
2398 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2399 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2400 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2401 (1ULL << WLAN_EID_HT_OPERATION
);
2403 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2404 struct ieee80211_mgmt
*mgmt
,
2406 struct ieee80211_rx_status
*rx_status
)
2408 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2409 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2411 struct ieee802_11_elems elems
;
2412 struct ieee80211_local
*local
= sdata
->local
;
2413 struct ieee80211_chanctx_conf
*chanctx_conf
;
2414 struct ieee80211_channel
*chan
;
2416 bool erp_valid
, directed_tim
= false;
2421 lockdep_assert_held(&ifmgd
->mtx
);
2423 /* Process beacon from the current BSS */
2424 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2429 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2430 if (!chanctx_conf
) {
2435 if (rx_status
->freq
!= chanctx_conf
->channel
->center_freq
) {
2439 chan
= chanctx_conf
->channel
;
2442 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2443 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2444 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2445 len
- baselen
, &elems
);
2447 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2449 ifmgd
->assoc_data
->have_beacon
= true;
2450 ifmgd
->assoc_data
->sent_assoc
= false;
2451 /* continue assoc process */
2452 ifmgd
->assoc_data
->timeout
= jiffies
;
2453 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2457 if (!ifmgd
->associated
||
2458 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2460 bssid
= ifmgd
->associated
->bssid
;
2462 /* Track average RSSI from the Beacon frames of the current AP */
2463 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2464 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2465 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2466 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2467 ifmgd
->last_cqm_event_signal
= 0;
2468 ifmgd
->count_beacon_signal
= 1;
2469 ifmgd
->last_ave_beacon_signal
= 0;
2471 ifmgd
->ave_beacon_signal
=
2472 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2473 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2474 ifmgd
->ave_beacon_signal
) / 16;
2475 ifmgd
->count_beacon_signal
++;
2478 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2479 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2480 int sig
= ifmgd
->ave_beacon_signal
;
2481 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2484 * if signal crosses either of the boundaries, invoke callback
2485 * with appropriate parameters
2487 if (sig
> ifmgd
->rssi_max_thold
&&
2488 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2489 ifmgd
->last_ave_beacon_signal
= sig
;
2490 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2491 } else if (sig
< ifmgd
->rssi_min_thold
&&
2492 (last_sig
>= ifmgd
->rssi_max_thold
||
2494 ifmgd
->last_ave_beacon_signal
= sig
;
2495 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2499 if (bss_conf
->cqm_rssi_thold
&&
2500 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2501 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2502 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2503 int last_event
= ifmgd
->last_cqm_event_signal
;
2504 int thold
= bss_conf
->cqm_rssi_thold
;
2505 int hyst
= bss_conf
->cqm_rssi_hyst
;
2507 (last_event
== 0 || sig
< last_event
- hyst
)) {
2508 ifmgd
->last_cqm_event_signal
= sig
;
2509 ieee80211_cqm_rssi_notify(
2511 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2513 } else if (sig
> thold
&&
2514 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2515 ifmgd
->last_cqm_event_signal
= sig
;
2516 ieee80211_cqm_rssi_notify(
2518 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2523 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2524 mlme_dbg_ratelimited(sdata
,
2525 "cancelling probereq poll due to a received beacon\n");
2526 mutex_lock(&local
->mtx
);
2527 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2528 ieee80211_run_deferred_scan(local
);
2529 mutex_unlock(&local
->mtx
);
2531 mutex_lock(&local
->iflist_mtx
);
2532 ieee80211_recalc_ps(local
, -1);
2533 mutex_unlock(&local
->iflist_mtx
);
2537 * Push the beacon loss detection into the future since
2538 * we are processing a beacon from the AP just now.
2540 ieee80211_sta_reset_beacon_monitor(sdata
);
2542 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2543 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2544 len
- baselen
, &elems
,
2545 care_about_ies
, ncrc
);
2547 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2548 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2551 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2553 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2554 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2555 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2556 ieee80211_hw_config(local
,
2557 IEEE80211_CONF_CHANGE_PS
);
2559 ieee80211_send_nullfunc(local
, sdata
, 0);
2560 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2561 local
->pspolling
= true;
2564 * Here is assumed that the driver will be
2565 * able to send ps-poll frame and receive a
2566 * response even though power save mode is
2567 * enabled, but some drivers might require
2568 * to disable power save here. This needs
2569 * to be investigated.
2571 ieee80211_send_pspoll(local
, sdata
);
2576 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2578 ifmgd
->beacon_crc
= ncrc
;
2579 ifmgd
->beacon_crc_valid
= true;
2581 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2584 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2585 elems
.wmm_param_len
))
2586 changed
|= BSS_CHANGED_QOS
;
2588 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2590 erp_value
= elems
.erp_info
[0];
2594 changed
|= ieee80211_handle_bss_capability(sdata
,
2595 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2596 erp_valid
, erp_value
);
2599 if (elems
.ht_cap_elem
&& elems
.ht_operation
&& elems
.wmm_param
&&
2600 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2601 struct ieee80211_supported_band
*sband
;
2603 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
2605 changed
|= ieee80211_config_ht_tx(sdata
, elems
.ht_operation
,
2609 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
2610 mgmt
->u
.probe_resp
.capab_info
&
2611 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
2612 ieee80211_handle_pwr_constr(sdata
, chan
,
2614 elems
.country_elem_len
,
2615 elems
.pwr_constr_elem
);
2617 ieee80211_bss_info_change_notify(sdata
, changed
);
2620 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2621 struct sk_buff
*skb
)
2623 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2624 struct ieee80211_rx_status
*rx_status
;
2625 struct ieee80211_mgmt
*mgmt
;
2626 struct cfg80211_bss
*bss
= NULL
;
2627 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2630 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2631 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2632 fc
= le16_to_cpu(mgmt
->frame_control
);
2634 mutex_lock(&ifmgd
->mtx
);
2636 switch (fc
& IEEE80211_FCTL_STYPE
) {
2637 case IEEE80211_STYPE_BEACON
:
2638 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2640 case IEEE80211_STYPE_PROBE_RESP
:
2641 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2643 case IEEE80211_STYPE_AUTH
:
2644 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2646 case IEEE80211_STYPE_DEAUTH
:
2647 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2649 case IEEE80211_STYPE_DISASSOC
:
2650 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2652 case IEEE80211_STYPE_ASSOC_RESP
:
2653 case IEEE80211_STYPE_REASSOC_RESP
:
2654 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2656 case IEEE80211_STYPE_ACTION
:
2657 switch (mgmt
->u
.action
.category
) {
2658 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2659 ieee80211_sta_process_chanswitch(sdata
,
2660 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2661 (void *)ifmgd
->associated
->priv
,
2662 rx_status
->mactime
);
2666 mutex_unlock(&ifmgd
->mtx
);
2672 case RX_MGMT_CFG80211_DEAUTH
:
2673 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2675 case RX_MGMT_CFG80211_DISASSOC
:
2676 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2678 case RX_MGMT_CFG80211_RX_AUTH
:
2679 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2681 case RX_MGMT_CFG80211_RX_ASSOC
:
2682 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2684 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2685 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2688 WARN(1, "unexpected: %d", rma
);
2692 static void ieee80211_sta_timer(unsigned long data
)
2694 struct ieee80211_sub_if_data
*sdata
=
2695 (struct ieee80211_sub_if_data
*) data
;
2696 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2697 struct ieee80211_local
*local
= sdata
->local
;
2699 if (local
->quiescing
) {
2700 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2704 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2707 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2708 u8
*bssid
, u8 reason
)
2710 struct ieee80211_local
*local
= sdata
->local
;
2711 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2712 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2714 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2716 mutex_unlock(&ifmgd
->mtx
);
2719 * must be outside lock due to cfg80211,
2720 * but that's not a problem.
2722 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2724 mutex_lock(&local
->mtx
);
2725 ieee80211_recalc_idle(local
);
2726 mutex_unlock(&local
->mtx
);
2728 mutex_lock(&ifmgd
->mtx
);
2731 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2733 struct ieee80211_local
*local
= sdata
->local
;
2734 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2735 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2737 lockdep_assert_held(&ifmgd
->mtx
);
2739 if (WARN_ON_ONCE(!auth_data
))
2744 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2745 sdata_info(sdata
, "authentication with %pM timed out\n",
2746 auth_data
->bss
->bssid
);
2749 * Most likely AP is not in the range so remove the
2750 * bss struct for that AP.
2752 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2757 drv_mgd_prepare_tx(local
, sdata
);
2759 if (auth_data
->bss
->proberesp_ies
) {
2760 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
2761 auth_data
->bss
->bssid
, auth_data
->tries
,
2762 IEEE80211_AUTH_MAX_TRIES
);
2764 auth_data
->expected_transaction
= 2;
2765 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2766 auth_data
->ie
, auth_data
->ie_len
,
2767 auth_data
->bss
->bssid
,
2768 auth_data
->bss
->bssid
, NULL
, 0, 0);
2772 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
2773 auth_data
->bss
->bssid
, auth_data
->tries
,
2774 IEEE80211_AUTH_MAX_TRIES
);
2776 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2780 * Direct probe is sent to broadcast address as some APs
2781 * will not answer to direct packet in unassociated state.
2783 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2784 NULL
, 0, (u32
) -1, true, false,
2785 auth_data
->bss
->channel
, false);
2788 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2789 run_again(ifmgd
, auth_data
->timeout
);
2794 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2796 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2797 struct ieee80211_local
*local
= sdata
->local
;
2799 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2801 assoc_data
->tries
++;
2802 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2803 sdata_info(sdata
, "association with %pM timed out\n",
2804 assoc_data
->bss
->bssid
);
2807 * Most likely AP is not in the range so remove the
2808 * bss struct for that AP.
2810 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2815 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
2816 assoc_data
->bss
->bssid
, assoc_data
->tries
,
2817 IEEE80211_ASSOC_MAX_TRIES
);
2818 ieee80211_send_assoc(sdata
);
2820 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2821 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2826 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2828 struct ieee80211_local
*local
= sdata
->local
;
2829 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2831 mutex_lock(&ifmgd
->mtx
);
2833 if (ifmgd
->auth_data
&&
2834 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2835 if (ifmgd
->auth_data
->done
) {
2837 * ok ... we waited for assoc but userspace didn't,
2838 * so let's just kill the auth data
2840 ieee80211_destroy_auth_data(sdata
, false);
2841 } else if (ieee80211_probe_auth(sdata
)) {
2844 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2846 ieee80211_destroy_auth_data(sdata
, false);
2848 mutex_unlock(&ifmgd
->mtx
);
2849 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2850 mutex_lock(&ifmgd
->mtx
);
2852 } else if (ifmgd
->auth_data
)
2853 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2855 if (ifmgd
->assoc_data
&&
2856 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2857 if (!ifmgd
->assoc_data
->have_beacon
||
2858 ieee80211_do_assoc(sdata
)) {
2861 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2863 ieee80211_destroy_assoc_data(sdata
, false);
2865 mutex_unlock(&ifmgd
->mtx
);
2866 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2867 mutex_lock(&ifmgd
->mtx
);
2869 } else if (ifmgd
->assoc_data
)
2870 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2872 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2873 IEEE80211_STA_CONNECTION_POLL
) &&
2874 ifmgd
->associated
) {
2878 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2880 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2881 max_tries
= max_nullfunc_tries
;
2883 max_tries
= max_probe_tries
;
2885 /* ACK received for nullfunc probing frame */
2886 if (!ifmgd
->probe_send_count
)
2887 ieee80211_reset_ap_probe(sdata
);
2888 else if (ifmgd
->nullfunc_failed
) {
2889 if (ifmgd
->probe_send_count
< max_tries
) {
2891 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2892 bssid
, ifmgd
->probe_send_count
,
2894 ieee80211_mgd_probe_ap_send(sdata
);
2897 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2899 ieee80211_sta_connection_lost(sdata
, bssid
,
2900 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2902 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2903 run_again(ifmgd
, ifmgd
->probe_timeout
);
2904 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2906 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2907 bssid
, probe_wait_ms
);
2908 ieee80211_sta_connection_lost(sdata
, bssid
,
2909 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2910 } else if (ifmgd
->probe_send_count
< max_tries
) {
2912 "No probe response from AP %pM after %dms, try %d/%i\n",
2913 bssid
, probe_wait_ms
,
2914 ifmgd
->probe_send_count
, max_tries
);
2915 ieee80211_mgd_probe_ap_send(sdata
);
2918 * We actually lost the connection ... or did we?
2921 wiphy_debug(local
->hw
.wiphy
,
2922 "%s: No probe response from AP %pM"
2923 " after %dms, disconnecting.\n",
2925 bssid
, probe_wait_ms
);
2927 ieee80211_sta_connection_lost(sdata
, bssid
,
2928 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2932 mutex_unlock(&ifmgd
->mtx
);
2934 mutex_lock(&local
->mtx
);
2935 ieee80211_recalc_idle(local
);
2936 mutex_unlock(&local
->mtx
);
2939 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2941 struct ieee80211_sub_if_data
*sdata
=
2942 (struct ieee80211_sub_if_data
*) data
;
2943 struct ieee80211_local
*local
= sdata
->local
;
2945 if (local
->quiescing
)
2948 ieee80211_queue_work(&sdata
->local
->hw
,
2949 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2952 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2954 struct ieee80211_sub_if_data
*sdata
=
2955 (struct ieee80211_sub_if_data
*) data
;
2956 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2957 struct ieee80211_local
*local
= sdata
->local
;
2959 if (local
->quiescing
)
2962 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2965 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2967 struct ieee80211_sub_if_data
*sdata
=
2968 container_of(work
, struct ieee80211_sub_if_data
,
2969 u
.mgd
.monitor_work
);
2971 ieee80211_mgd_probe_ap(sdata
, false);
2974 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2978 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2979 __ieee80211_stop_poll(sdata
);
2981 /* let's probe the connection once */
2982 flags
= sdata
->local
->hw
.flags
;
2983 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2984 ieee80211_queue_work(&sdata
->local
->hw
,
2985 &sdata
->u
.mgd
.monitor_work
);
2986 /* and do all the other regular work too */
2987 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2992 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2994 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2997 * we need to use atomic bitops for the running bits
2998 * only because both timers might fire at the same
2999 * time -- the code here is properly synchronised.
3002 cancel_work_sync(&ifmgd
->request_smps_work
);
3004 cancel_work_sync(&ifmgd
->monitor_work
);
3005 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3006 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3007 if (del_timer_sync(&ifmgd
->timer
))
3008 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3010 cancel_work_sync(&ifmgd
->chswitch_work
);
3011 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3012 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3014 /* these will just be re-established on connection */
3015 del_timer_sync(&ifmgd
->conn_mon_timer
);
3016 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3019 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3021 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3023 if (!ifmgd
->associated
)
3026 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3027 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3028 mutex_lock(&ifmgd
->mtx
);
3029 if (ifmgd
->associated
) {
3031 "driver requested disconnect after resume\n");
3032 ieee80211_sta_connection_lost(sdata
,
3033 ifmgd
->associated
->bssid
,
3034 WLAN_REASON_UNSPECIFIED
);
3035 mutex_unlock(&ifmgd
->mtx
);
3038 mutex_unlock(&ifmgd
->mtx
);
3041 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3042 add_timer(&ifmgd
->timer
);
3043 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3044 add_timer(&ifmgd
->chswitch_timer
);
3045 ieee80211_sta_reset_beacon_monitor(sdata
);
3047 mutex_lock(&sdata
->local
->mtx
);
3048 ieee80211_restart_sta_timer(sdata
);
3049 mutex_unlock(&sdata
->local
->mtx
);
3053 /* interface setup */
3054 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3056 struct ieee80211_if_managed
*ifmgd
;
3058 ifmgd
= &sdata
->u
.mgd
;
3059 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3060 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3061 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3062 ieee80211_beacon_connection_loss_work
);
3063 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3064 ieee80211_csa_connection_drop_work
);
3065 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3066 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3067 (unsigned long) sdata
);
3068 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3069 (unsigned long) sdata
);
3070 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3071 (unsigned long) sdata
);
3072 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3073 (unsigned long) sdata
);
3076 ifmgd
->powersave
= sdata
->wdev
.ps
;
3077 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3078 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3080 mutex_init(&ifmgd
->mtx
);
3082 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3083 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3085 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3088 /* scan finished notification */
3089 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3091 struct ieee80211_sub_if_data
*sdata
;
3093 /* Restart STA timers */
3095 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3096 ieee80211_restart_sta_timer(sdata
);
3100 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3101 unsigned long data
, void *dummy
)
3103 s32 latency_usec
= (s32
) data
;
3104 struct ieee80211_local
*local
=
3105 container_of(nb
, struct ieee80211_local
,
3106 network_latency_notifier
);
3108 mutex_lock(&local
->iflist_mtx
);
3109 ieee80211_recalc_ps(local
, latency_usec
);
3110 mutex_unlock(&local
->iflist_mtx
);
3115 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3116 struct cfg80211_bss
*cbss
)
3118 struct ieee80211_local
*local
= sdata
->local
;
3119 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3121 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
3122 const u8
*ht_oper_ie
;
3123 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3124 struct ieee80211_supported_band
*sband
;
3126 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3128 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_40MHZ
;
3130 if (sband
->ht_cap
.ht_supported
) {
3131 ht_oper_ie
= cfg80211_find_ie(WLAN_EID_HT_OPERATION
,
3132 cbss
->information_elements
,
3133 cbss
->len_information_elements
);
3134 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3135 ht_oper
= (void *)(ht_oper_ie
+ 2);
3139 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
3140 cbss
->channel
->band
);
3141 /* check that channel matches the right operating channel */
3142 if (cbss
->channel
->center_freq
!= ht_cfreq
) {
3144 * It's possible that some APs are confused here;
3145 * Netgear WNDR3700 sometimes reports 4 higher than
3146 * the actual channel in association responses, but
3147 * since we look at probe response/beacon data here
3151 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3152 cbss
->channel
->center_freq
,
3153 ht_cfreq
, ht_oper
->primary_chan
,
3154 cbss
->channel
->band
);
3160 const u8
*ht_cap_ie
;
3161 const struct ieee80211_ht_cap
*ht_cap
;
3164 channel_type
= NL80211_CHAN_HT20
;
3166 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
3167 switch (ht_oper
->ht_param
&
3168 IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
3169 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
3170 channel_type
= NL80211_CHAN_HT40PLUS
;
3172 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
3173 channel_type
= NL80211_CHAN_HT40MINUS
;
3178 ht_cap_ie
= cfg80211_find_ie(WLAN_EID_HT_CAPABILITY
,
3179 cbss
->information_elements
,
3180 cbss
->len_information_elements
);
3181 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3182 ht_cap
= (void *)(ht_cap_ie
+ 2);
3183 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3185 sdata
->needed_rx_chains
= min(chains
, local
->rx_chains
);
3187 sdata
->needed_rx_chains
= 1;
3190 /* will change later if needed */
3191 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3193 ieee80211_vif_release_channel(sdata
);
3194 return ieee80211_vif_use_channel(sdata
, cbss
->channel
, channel_type
,
3195 IEEE80211_CHANCTX_SHARED
);
3198 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3199 struct cfg80211_bss
*cbss
, bool assoc
)
3201 struct ieee80211_local
*local
= sdata
->local
;
3202 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3203 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3204 struct sta_info
*new_sta
= NULL
;
3205 bool have_sta
= false;
3208 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3213 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3218 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3223 mutex_lock(&local
->mtx
);
3224 ieee80211_recalc_idle(sdata
->local
);
3225 mutex_unlock(&local
->mtx
);
3228 u32 rates
= 0, basic_rates
= 0;
3229 bool have_higher_than_11mbit
;
3230 int min_rate
= INT_MAX
, min_rate_index
= -1;
3231 struct ieee80211_supported_band
*sband
;
3233 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3235 err
= ieee80211_prep_channel(sdata
, cbss
);
3237 sta_info_free(local
, new_sta
);
3241 ieee80211_get_rates(sband
, bss
->supp_rates
,
3242 bss
->supp_rates_len
,
3243 &rates
, &basic_rates
,
3244 &have_higher_than_11mbit
,
3245 &min_rate
, &min_rate_index
);
3248 * This used to be a workaround for basic rates missing
3249 * in the association response frame. Now that we no
3250 * longer use the basic rates from there, it probably
3251 * doesn't happen any more, but keep the workaround so
3252 * in case some *other* APs are buggy in different ways
3253 * we can connect -- with a warning.
3255 if (!basic_rates
&& min_rate_index
>= 0) {
3257 "No basic rates, using min rate instead\n");
3258 basic_rates
= BIT(min_rate_index
);
3261 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3262 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3264 /* cf. IEEE 802.11 9.2.12 */
3265 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3266 have_higher_than_11mbit
)
3267 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3269 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3271 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3273 /* set timing information */
3274 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3275 sdata
->vif
.bss_conf
.sync_tsf
= cbss
->tsf
;
3276 sdata
->vif
.bss_conf
.sync_device_ts
= bss
->device_ts
;
3278 /* tell driver about BSSID, basic rates and timing */
3279 ieee80211_bss_info_change_notify(sdata
,
3280 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3281 BSS_CHANGED_BEACON_INT
);
3284 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3286 err
= sta_info_insert(new_sta
);
3290 "failed to insert STA entry for the AP (error %d)\n",
3295 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3301 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3302 struct cfg80211_auth_request
*req
)
3304 struct ieee80211_local
*local
= sdata
->local
;
3305 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3306 struct ieee80211_mgd_auth_data
*auth_data
;
3310 /* prepare auth data structure */
3312 switch (req
->auth_type
) {
3313 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3314 auth_alg
= WLAN_AUTH_OPEN
;
3316 case NL80211_AUTHTYPE_SHARED_KEY
:
3317 if (IS_ERR(local
->wep_tx_tfm
))
3319 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3321 case NL80211_AUTHTYPE_FT
:
3322 auth_alg
= WLAN_AUTH_FT
;
3324 case NL80211_AUTHTYPE_NETWORK_EAP
:
3325 auth_alg
= WLAN_AUTH_LEAP
;
3331 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3335 auth_data
->bss
= req
->bss
;
3337 if (req
->ie
&& req
->ie_len
) {
3338 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3339 auth_data
->ie_len
= req
->ie_len
;
3342 if (req
->key
&& req
->key_len
) {
3343 auth_data
->key_len
= req
->key_len
;
3344 auth_data
->key_idx
= req
->key_idx
;
3345 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3348 auth_data
->algorithm
= auth_alg
;
3350 /* try to authenticate/probe */
3352 mutex_lock(&ifmgd
->mtx
);
3354 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3355 ifmgd
->assoc_data
) {
3360 if (ifmgd
->auth_data
)
3361 ieee80211_destroy_auth_data(sdata
, false);
3363 /* prep auth_data so we don't go into idle on disassoc */
3364 ifmgd
->auth_data
= auth_data
;
3366 if (ifmgd
->associated
)
3367 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3369 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3371 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3375 err
= ieee80211_probe_auth(sdata
);
3377 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3381 /* hold our own reference */
3382 cfg80211_ref_bss(auth_data
->bss
);
3387 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3388 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3389 ifmgd
->auth_data
= NULL
;
3393 mutex_unlock(&ifmgd
->mtx
);
3398 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3399 struct cfg80211_assoc_request
*req
)
3401 struct ieee80211_local
*local
= sdata
->local
;
3402 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3403 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3404 struct ieee80211_mgd_assoc_data
*assoc_data
;
3405 struct ieee80211_supported_band
*sband
;
3406 const u8
*ssidie
, *ht_ie
;
3409 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3413 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3417 mutex_lock(&ifmgd
->mtx
);
3419 if (ifmgd
->associated
)
3420 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3422 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3427 if (ifmgd
->assoc_data
) {
3432 if (ifmgd
->auth_data
) {
3435 /* keep sta info, bssid if matching */
3436 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
3437 ieee80211_destroy_auth_data(sdata
, match
);
3440 /* prepare assoc data */
3443 * keep only the 40 MHz disable bit set as it might have
3444 * been set during authentication already, all other bits
3445 * should be reset for a new connection
3447 ifmgd
->flags
&= IEEE80211_STA_DISABLE_40MHZ
;
3449 ifmgd
->beacon_crc_valid
= false;
3452 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3453 * We still associate in non-HT mode (11a/b/g) if any one of these
3454 * ciphers is configured as pairwise.
3455 * We can set this to true for non-11n hardware, that'll be checked
3456 * separately along with the peer capabilities.
3458 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
3459 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3460 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3461 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
3462 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3463 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3464 netdev_info(sdata
->dev
,
3465 "disabling HT/VHT due to WEP/TKIP use\n");
3469 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
3470 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3471 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3474 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3475 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3476 if (!sband
->ht_cap
.ht_supported
||
3477 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3478 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3480 netdev_info(sdata
->dev
,
3481 "disabling HT as WMM/QoS is not supported by the AP\n");
3484 /* disable VHT if we don't support it or the AP doesn't use WMM */
3485 if (!sband
->vht_cap
.vht_supported
||
3486 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
3487 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3489 netdev_info(sdata
->dev
,
3490 "disabling VHT as WMM/QoS is not supported by the AP\n");
3493 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3494 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3495 sizeof(ifmgd
->ht_capa_mask
));
3497 if (req
->ie
&& req
->ie_len
) {
3498 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3499 assoc_data
->ie_len
= req
->ie_len
;
3502 assoc_data
->bss
= req
->bss
;
3504 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3505 if (ifmgd
->powersave
)
3506 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
3508 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3510 sdata
->smps_mode
= ifmgd
->req_smps
;
3512 assoc_data
->capability
= req
->bss
->capability
;
3513 assoc_data
->wmm
= bss
->wmm_used
&&
3514 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
3515 assoc_data
->supp_rates
= bss
->supp_rates
;
3516 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3518 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
3519 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
3520 assoc_data
->ap_ht_param
=
3521 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
3523 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3525 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3526 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3527 assoc_data
->uapsd
= true;
3528 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3530 assoc_data
->uapsd
= false;
3531 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3534 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3535 assoc_data
->ssid_len
= ssidie
[1];
3537 if (req
->prev_bssid
)
3538 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3541 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3542 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3544 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3545 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3548 if (req
->crypto
.control_port
)
3549 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3551 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3553 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3554 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3556 /* kick off associate process */
3558 ifmgd
->assoc_data
= assoc_data
;
3560 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3564 if (!bss
->dtim_period
&&
3565 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3567 * Wait up to one beacon interval ...
3568 * should this be more if we miss one?
3570 sdata_info(sdata
, "waiting for beacon from %pM\n",
3572 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3574 assoc_data
->have_beacon
= true;
3575 assoc_data
->sent_assoc
= false;
3576 assoc_data
->timeout
= jiffies
;
3578 run_again(ifmgd
, assoc_data
->timeout
);
3580 if (bss
->corrupt_data
) {
3581 char *corrupt_type
= "data";
3582 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3583 if (bss
->corrupt_data
&
3584 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3585 corrupt_type
= "beacon and probe response";
3587 corrupt_type
= "beacon";
3588 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3589 corrupt_type
= "probe response";
3590 sdata_info(sdata
, "associating with AP with corrupt %s\n",
3597 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3598 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3599 ifmgd
->assoc_data
= NULL
;
3603 mutex_unlock(&ifmgd
->mtx
);
3608 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3609 struct cfg80211_deauth_request
*req
)
3611 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3612 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3614 mutex_lock(&ifmgd
->mtx
);
3616 if (ifmgd
->auth_data
) {
3617 ieee80211_destroy_auth_data(sdata
, false);
3618 mutex_unlock(&ifmgd
->mtx
);
3623 "deauthenticating from %pM by local choice (reason=%d)\n",
3624 req
->bssid
, req
->reason_code
);
3626 if (ifmgd
->associated
&&
3627 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
3628 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3629 req
->reason_code
, true, frame_buf
);
3631 drv_mgd_prepare_tx(sdata
->local
, sdata
);
3632 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3633 IEEE80211_STYPE_DEAUTH
,
3634 req
->reason_code
, true,
3638 mutex_unlock(&ifmgd
->mtx
);
3640 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
3641 IEEE80211_DEAUTH_FRAME_LEN
);
3643 mutex_lock(&sdata
->local
->mtx
);
3644 ieee80211_recalc_idle(sdata
->local
);
3645 mutex_unlock(&sdata
->local
->mtx
);
3650 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3651 struct cfg80211_disassoc_request
*req
)
3653 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3655 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3657 mutex_lock(&ifmgd
->mtx
);
3660 * cfg80211 should catch this ... but it's racy since
3661 * we can receive a disassoc frame, process it, hand it
3662 * to cfg80211 while that's in a locked section already
3663 * trying to tell us that the user wants to disconnect.
3665 if (ifmgd
->associated
!= req
->bss
) {
3666 mutex_unlock(&ifmgd
->mtx
);
3671 "disassociating from %pM by local choice (reason=%d)\n",
3672 req
->bss
->bssid
, req
->reason_code
);
3674 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3675 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3676 req
->reason_code
, !req
->local_state_change
,
3678 mutex_unlock(&ifmgd
->mtx
);
3680 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
3681 IEEE80211_DEAUTH_FRAME_LEN
);
3683 mutex_lock(&sdata
->local
->mtx
);
3684 ieee80211_recalc_idle(sdata
->local
);
3685 mutex_unlock(&sdata
->local
->mtx
);
3690 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
3692 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3694 mutex_lock(&ifmgd
->mtx
);
3695 if (ifmgd
->assoc_data
)
3696 ieee80211_destroy_assoc_data(sdata
, false);
3697 if (ifmgd
->auth_data
)
3698 ieee80211_destroy_auth_data(sdata
, false);
3699 del_timer_sync(&ifmgd
->timer
);
3700 mutex_unlock(&ifmgd
->mtx
);
3703 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3704 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3707 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3709 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3711 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3713 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);