2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
39 static int max_nullfunc_tries
= 2;
40 module_param(max_nullfunc_tries
, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries
,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
44 static int max_probe_tries
= 5;
45 module_param(max_probe_tries
, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries
,
47 "Maximum probe tries before disconnecting (reason 4).");
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
57 #define IEEE80211_BEACON_LOSS_COUNT 7
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
69 static int probe_wait_ms
= 500;
70 module_param(probe_wait_ms
, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms
,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
91 #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
120 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
122 lockdep_assert_held(&ifmgd
->mtx
);
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
135 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
137 ASSERT_MGD_MTX(ifmgd
);
139 if (!timer_pending(&ifmgd
->timer
) ||
140 time_before(timeout
, ifmgd
->timer
.expires
))
141 mod_timer(&ifmgd
->timer
, timeout
);
144 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
146 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
149 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
150 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
153 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 if (unlikely(!sdata
->u
.mgd
.associated
))
160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
163 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
164 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
166 ifmgd
->probe_send_count
= 0;
169 static int ecw2cw(int ecw
)
171 return (1 << ecw
) - 1;
175 * ieee80211_enable_ht should be called only after the operating band
176 * has been determined as ht configuration depends on the hw's
177 * HT abilities for a specific band.
179 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
180 struct ieee80211_ht_info
*hti
,
181 const u8
*bssid
, u16 ap_ht_cap_flags
,
182 bool beacon_htcap_ie
)
184 struct ieee80211_local
*local
= sdata
->local
;
185 struct ieee80211_supported_band
*sband
;
186 struct sta_info
*sta
;
190 bool enable_ht
= true;
191 enum nl80211_channel_type prev_chantype
;
192 enum nl80211_channel_type rx_channel_type
= NL80211_CHAN_NO_HT
;
193 enum nl80211_channel_type tx_channel_type
;
195 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
196 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
199 hti_cfreq
= ieee80211_channel_to_frequency(hti
->control_chan
,
201 /* check that channel matches the right operating channel */
202 if (local
->hw
.conf
.channel
->center_freq
!= hti_cfreq
) {
203 /* Some APs mess this up, evidently.
204 * Netgear WNDR3700 sometimes reports 4 higher than
205 * the actual channel, for instance.
208 "%s: Wrong control channel in association"
209 " response: configured center-freq: %d"
210 " hti-cfreq: %d hti->control_chan: %d"
211 " band: %d. Disabling HT.\n",
213 local
->hw
.conf
.channel
->center_freq
,
214 hti_cfreq
, hti
->control_chan
,
220 rx_channel_type
= NL80211_CHAN_HT20
;
222 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
223 !ieee80111_cfg_override_disables_ht40(sdata
) &&
224 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
225 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
226 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
227 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
228 rx_channel_type
= NL80211_CHAN_HT40PLUS
;
230 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
231 rx_channel_type
= NL80211_CHAN_HT40MINUS
;
237 tx_channel_type
= ieee80211_get_tx_channel_type(local
, rx_channel_type
);
239 if (local
->tmp_channel
)
240 local
->tmp_channel_type
= rx_channel_type
;
242 if (!ieee80211_set_channel_type(local
, sdata
, rx_channel_type
)) {
243 /* can only fail due to HT40+/- mismatch */
244 rx_channel_type
= NL80211_CHAN_HT20
;
245 WARN_ON(!ieee80211_set_channel_type(local
, sdata
,
249 if (beacon_htcap_ie
&& (prev_chantype
!= rx_channel_type
)) {
251 * Whenever the AP announces the HT mode change that can be
252 * 40MHz intolerant or etc., it would be safer to stop tx
253 * queues before doing hw config to avoid buffer overflow.
255 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
256 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
258 /* flush out all packets */
261 drv_flush(local
, false);
264 /* channel_type change automatically detected */
265 ieee80211_hw_config(local
, 0);
267 if (prev_chantype
!= tx_channel_type
) {
269 sta
= sta_info_get(sdata
, bssid
);
271 rate_control_rate_update(local
, sband
, sta
,
272 IEEE80211_RC_HT_CHANGED
,
277 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
278 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
281 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
283 /* if bss configuration changed store the new one */
284 if (sdata
->ht_opmode_valid
!= enable_ht
||
285 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
286 prev_chantype
!= rx_channel_type
) {
287 changed
|= BSS_CHANGED_HT
;
288 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
289 sdata
->ht_opmode_valid
= enable_ht
;
295 /* frame sending functions */
297 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
298 struct ieee80211_supported_band
*sband
,
304 for (i
= 0; i
< supp_rates_len
; i
++) {
305 int rate
= (supp_rates
[i
] & 0x7F) * 5;
307 for (j
= 0; j
< sband
->n_bitrates
; j
++)
308 if (sband
->bitrates
[j
].bitrate
== rate
) {
318 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
319 struct sk_buff
*skb
, const u8
*ht_info_ie
,
320 struct ieee80211_supported_band
*sband
,
321 struct ieee80211_channel
*channel
,
322 enum ieee80211_smps_mode smps
)
324 struct ieee80211_ht_info
*ht_info
;
326 u32 flags
= channel
->flags
;
328 struct ieee80211_sta_ht_cap ht_cap
;
330 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
335 if (ht_info_ie
[1] < sizeof(struct ieee80211_ht_info
))
338 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
339 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
341 ht_info
= (struct ieee80211_ht_info
*)(ht_info_ie
+ 2);
343 /* determine capability flags */
346 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
347 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
348 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
349 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
350 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
353 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
354 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
355 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
356 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
361 /* set SM PS mode properly */
362 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
364 case IEEE80211_SMPS_AUTOMATIC
:
365 case IEEE80211_SMPS_NUM_MODES
:
367 case IEEE80211_SMPS_OFF
:
368 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
369 IEEE80211_HT_CAP_SM_PS_SHIFT
;
371 case IEEE80211_SMPS_STATIC
:
372 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
373 IEEE80211_HT_CAP_SM_PS_SHIFT
;
375 case IEEE80211_SMPS_DYNAMIC
:
376 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
377 IEEE80211_HT_CAP_SM_PS_SHIFT
;
381 /* reserve and fill IE */
382 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
383 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
386 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
388 struct ieee80211_local
*local
= sdata
->local
;
389 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
390 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
392 struct ieee80211_mgmt
*mgmt
;
394 size_t offset
= 0, noffset
;
395 int i
, count
, rates_len
, supp_rates_len
;
397 struct ieee80211_supported_band
*sband
;
400 lockdep_assert_held(&ifmgd
->mtx
);
402 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
404 if (assoc_data
->supp_rates_len
) {
406 * Get all rates supported by the device and the AP as
407 * some APs don't like getting a superset of their rates
408 * in the association request (e.g. D-Link DAP 1353 in
411 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
412 assoc_data
->supp_rates_len
,
416 * In case AP not provide any supported rates information
417 * before association, we send information element(s) with
418 * all rates that we support.
421 rates_len
= sband
->n_bitrates
;
424 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
425 sizeof(*mgmt
) + /* bit too much but doesn't matter */
426 2 + assoc_data
->ssid_len
+ /* SSID */
427 4 + rates_len
+ /* (extended) rates */
428 4 + /* power capability */
429 2 + 2 * sband
->n_channels
+ /* supported channels */
430 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
431 assoc_data
->ie_len
+ /* extra IEs */
437 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
439 capab
= WLAN_CAPABILITY_ESS
;
441 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
442 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
443 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
444 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
445 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
448 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
449 capab
|= WLAN_CAPABILITY_PRIVACY
;
451 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
452 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
453 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
455 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
457 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
458 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
459 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
461 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
463 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
464 IEEE80211_STYPE_REASSOC_REQ
);
465 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
466 mgmt
->u
.reassoc_req
.listen_interval
=
467 cpu_to_le16(local
->hw
.conf
.listen_interval
);
468 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
472 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
473 IEEE80211_STYPE_ASSOC_REQ
);
474 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
475 mgmt
->u
.assoc_req
.listen_interval
=
476 cpu_to_le16(local
->hw
.conf
.listen_interval
);
480 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
481 *pos
++ = WLAN_EID_SSID
;
482 *pos
++ = assoc_data
->ssid_len
;
483 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
485 /* add all rates which were marked to be used above */
486 supp_rates_len
= rates_len
;
487 if (supp_rates_len
> 8)
490 pos
= skb_put(skb
, supp_rates_len
+ 2);
491 *pos
++ = WLAN_EID_SUPP_RATES
;
492 *pos
++ = supp_rates_len
;
495 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
496 if (BIT(i
) & rates
) {
497 int rate
= sband
->bitrates
[i
].bitrate
;
498 *pos
++ = (u8
) (rate
/ 5);
504 if (rates_len
> count
) {
505 pos
= skb_put(skb
, rates_len
- count
+ 2);
506 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
507 *pos
++ = rates_len
- count
;
509 for (i
++; i
< sband
->n_bitrates
; i
++) {
510 if (BIT(i
) & rates
) {
511 int rate
= sband
->bitrates
[i
].bitrate
;
512 *pos
++ = (u8
) (rate
/ 5);
517 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
518 /* 1. power capabilities */
519 pos
= skb_put(skb
, 4);
520 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
522 *pos
++ = 0; /* min tx power */
523 *pos
++ = local
->oper_channel
->max_power
; /* max tx power */
525 /* 2. supported channels */
526 /* TODO: get this in reg domain format */
527 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
528 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
529 *pos
++ = 2 * sband
->n_channels
;
530 for (i
= 0; i
< sband
->n_channels
; i
++) {
531 *pos
++ = ieee80211_frequency_to_channel(
532 sband
->channels
[i
].center_freq
);
533 *pos
++ = 1; /* one channel in the subband*/
537 /* if present, add any custom IEs that go before HT */
538 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
539 static const u8 before_ht
[] = {
542 WLAN_EID_EXT_SUPP_RATES
,
543 WLAN_EID_PWR_CAPABILITY
,
544 WLAN_EID_SUPPORTED_CHANNELS
,
547 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
548 WLAN_EID_MOBILITY_DOMAIN
,
549 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
551 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
552 before_ht
, ARRAY_SIZE(before_ht
),
554 pos
= skb_put(skb
, noffset
- offset
);
555 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
559 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
560 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ht_information_ie
,
561 sband
, local
->oper_channel
, ifmgd
->ap_smps
);
563 /* if present, add any custom non-vendor IEs that go after HT */
564 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
565 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
568 pos
= skb_put(skb
, noffset
- offset
);
569 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
573 if (assoc_data
->wmm
) {
574 if (assoc_data
->uapsd
) {
575 qos_info
= ifmgd
->uapsd_queues
;
576 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
577 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
582 pos
= skb_put(skb
, 9);
583 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
584 *pos
++ = 7; /* len */
585 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
588 *pos
++ = 2; /* WME */
589 *pos
++ = 0; /* WME info */
590 *pos
++ = 1; /* WME ver */
594 /* add any remaining custom (i.e. vendor specific here) IEs */
595 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
596 noffset
= assoc_data
->ie_len
;
597 pos
= skb_put(skb
, noffset
- offset
);
598 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
601 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
602 ieee80211_tx_skb(sdata
, skb
);
605 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
606 const u8
*bssid
, u16 stype
,
607 u16 reason
, bool send_frame
,
610 struct ieee80211_local
*local
= sdata
->local
;
611 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
613 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
616 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
617 mgmt
->duration
= 0; /* initialize only */
618 mgmt
->seq_ctrl
= 0; /* initialize only */
619 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
620 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
621 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
622 /* u.deauth.reason_code == u.disassoc.reason_code */
623 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
626 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
627 DEAUTH_DISASSOC_LEN
);
631 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
634 memcpy(skb_put(skb
, DEAUTH_DISASSOC_LEN
),
635 mgmt
, DEAUTH_DISASSOC_LEN
);
637 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
638 IEEE80211_SKB_CB(skb
)->flags
|=
639 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
640 ieee80211_tx_skb(sdata
, skb
);
644 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
645 struct ieee80211_sub_if_data
*sdata
)
647 struct ieee80211_pspoll
*pspoll
;
650 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
654 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
655 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
657 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
658 ieee80211_tx_skb(sdata
, skb
);
661 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
662 struct ieee80211_sub_if_data
*sdata
,
666 struct ieee80211_hdr_3addr
*nullfunc
;
667 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
669 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
673 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
675 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
677 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
678 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
679 IEEE80211_STA_CONNECTION_POLL
))
680 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
682 ieee80211_tx_skb(sdata
, skb
);
685 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
686 struct ieee80211_sub_if_data
*sdata
)
689 struct ieee80211_hdr
*nullfunc
;
692 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
695 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
699 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
701 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
702 memset(nullfunc
, 0, 30);
703 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
704 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
705 nullfunc
->frame_control
= fc
;
706 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
707 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
708 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
709 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
711 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
712 ieee80211_tx_skb(sdata
, skb
);
715 /* spectrum management related things */
716 static void ieee80211_chswitch_work(struct work_struct
*work
)
718 struct ieee80211_sub_if_data
*sdata
=
719 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
720 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
722 if (!ieee80211_sdata_running(sdata
))
725 mutex_lock(&ifmgd
->mtx
);
726 if (!ifmgd
->associated
)
729 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
730 if (!sdata
->local
->ops
->channel_switch
) {
731 /* call "hw_config" only if doing sw channel switch */
732 ieee80211_hw_config(sdata
->local
,
733 IEEE80211_CONF_CHANGE_CHANNEL
);
735 /* update the device channel directly */
736 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
739 /* XXX: shouldn't really modify cfg80211-owned data! */
740 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
742 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
743 IEEE80211_QUEUE_STOP_REASON_CSA
);
745 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
746 mutex_unlock(&ifmgd
->mtx
);
749 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
751 struct ieee80211_sub_if_data
*sdata
;
752 struct ieee80211_if_managed
*ifmgd
;
754 sdata
= vif_to_sdata(vif
);
755 ifmgd
= &sdata
->u
.mgd
;
757 trace_api_chswitch_done(sdata
, success
);
760 * If the channel switch was not successful, stay
761 * around on the old channel. We currently lack
762 * good handling of this situation, possibly we
763 * should just drop the association.
765 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
768 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
770 EXPORT_SYMBOL(ieee80211_chswitch_done
);
772 static void ieee80211_chswitch_timer(unsigned long data
)
774 struct ieee80211_sub_if_data
*sdata
=
775 (struct ieee80211_sub_if_data
*) data
;
776 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
778 if (sdata
->local
->quiescing
) {
779 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
783 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
786 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
787 struct ieee80211_channel_sw_ie
*sw_elem
,
788 struct ieee80211_bss
*bss
,
791 struct cfg80211_bss
*cbss
=
792 container_of((void *)bss
, struct cfg80211_bss
, priv
);
793 struct ieee80211_channel
*new_ch
;
794 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
795 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
796 cbss
->channel
->band
);
798 ASSERT_MGD_MTX(ifmgd
);
800 if (!ifmgd
->associated
)
803 if (sdata
->local
->scanning
)
806 /* Disregard subsequent beacons if we are already running a timer
809 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
812 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
813 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
816 sdata
->local
->csa_channel
= new_ch
;
818 if (sdata
->local
->ops
->channel_switch
) {
819 /* use driver's channel switch callback */
820 struct ieee80211_channel_switch ch_switch
;
821 memset(&ch_switch
, 0, sizeof(ch_switch
));
822 ch_switch
.timestamp
= timestamp
;
824 ch_switch
.block_tx
= true;
825 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
826 IEEE80211_QUEUE_STOP_REASON_CSA
);
828 ch_switch
.channel
= new_ch
;
829 ch_switch
.count
= sw_elem
->count
;
830 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
831 drv_channel_switch(sdata
->local
, &ch_switch
);
835 /* channel switch handled in software */
836 if (sw_elem
->count
<= 1) {
837 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
840 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
841 IEEE80211_QUEUE_STOP_REASON_CSA
);
842 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
843 mod_timer(&ifmgd
->chswitch_timer
,
845 msecs_to_jiffies(sw_elem
->count
*
846 cbss
->beacon_interval
));
850 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
851 u16 capab_info
, u8
*pwr_constr_elem
,
852 u8 pwr_constr_elem_len
)
854 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
856 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
859 /* Power constraint IE length should be 1 octet */
860 if (pwr_constr_elem_len
!= 1)
863 if ((*pwr_constr_elem
<= conf
->channel
->max_reg_power
) &&
864 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
865 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
866 ieee80211_hw_config(sdata
->local
, 0);
870 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
872 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
873 struct ieee80211_local
*local
= sdata
->local
;
874 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
876 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
877 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
878 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
880 local
->disable_dynamic_ps
= false;
881 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
883 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
885 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
887 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
888 struct ieee80211_local
*local
= sdata
->local
;
889 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
891 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
892 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
893 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
895 local
->disable_dynamic_ps
= true;
896 conf
->dynamic_ps_timeout
= 0;
897 del_timer_sync(&local
->dynamic_ps_timer
);
898 ieee80211_queue_work(&local
->hw
,
899 &local
->dynamic_ps_enable_work
);
901 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
904 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
905 struct ieee80211_sub_if_data
*sdata
)
907 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
910 * If we are scanning right now then the parameters will
911 * take effect when scan finishes.
916 if (conf
->dynamic_ps_timeout
> 0 &&
917 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
918 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
919 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
921 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
922 ieee80211_send_nullfunc(local
, sdata
, 1);
924 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
925 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
928 conf
->flags
|= IEEE80211_CONF_PS
;
929 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
933 static void ieee80211_change_ps(struct ieee80211_local
*local
)
935 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
937 if (local
->ps_sdata
) {
938 ieee80211_enable_ps(local
, local
->ps_sdata
);
939 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
940 conf
->flags
&= ~IEEE80211_CONF_PS
;
941 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
942 del_timer_sync(&local
->dynamic_ps_timer
);
943 cancel_work_sync(&local
->dynamic_ps_enable_work
);
947 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
949 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
950 struct sta_info
*sta
= NULL
;
951 bool authorized
= false;
959 if (!mgd
->associated
)
962 if (!mgd
->associated
->beacon_ies
)
965 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
966 IEEE80211_STA_CONNECTION_POLL
))
970 sta
= sta_info_get(sdata
, mgd
->bssid
);
972 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
978 /* need to hold RTNL or interface lock */
979 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
981 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
985 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
986 local
->ps_sdata
= NULL
;
990 if (!list_empty(&local
->work_list
)) {
991 local
->ps_sdata
= NULL
;
995 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
996 if (!ieee80211_sdata_running(sdata
))
998 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
999 /* If an AP vif is found, then disable PS
1000 * by setting the count to zero thereby setting
1006 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1012 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1013 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1017 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1019 beaconint_us
= ieee80211_tu_to_usec(
1020 found
->vif
.bss_conf
.beacon_int
);
1022 timeout
= local
->dynamic_ps_forced_timeout
;
1025 * Go to full PSM if the user configures a very low
1026 * latency requirement.
1027 * The 2000 second value is there for compatibility
1028 * until the PM_QOS_NETWORK_LATENCY is configured
1031 if (latency
> (1900 * USEC_PER_MSEC
) &&
1032 latency
!= (2000 * USEC_PER_SEC
))
1037 local
->dynamic_ps_user_timeout
= timeout
;
1038 if (!local
->disable_dynamic_ps
)
1039 conf
->dynamic_ps_timeout
=
1040 local
->dynamic_ps_user_timeout
;
1042 if (beaconint_us
> latency
) {
1043 local
->ps_sdata
= NULL
;
1045 struct ieee80211_bss
*bss
;
1049 bss
= (void *)found
->u
.mgd
.associated
->priv
;
1050 dtimper
= bss
->dtim_period
;
1052 /* If the TIM IE is invalid, pretend the value is 1 */
1055 else if (dtimper
> 1)
1056 maxslp
= min_t(int, dtimper
,
1057 latency
/ beaconint_us
);
1059 local
->hw
.conf
.max_sleep_period
= maxslp
;
1060 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1061 local
->ps_sdata
= found
;
1064 local
->ps_sdata
= NULL
;
1068 ieee80211_change_ps(local
);
1071 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1073 struct ieee80211_local
*local
=
1074 container_of(work
, struct ieee80211_local
,
1075 dynamic_ps_disable_work
);
1077 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1078 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1079 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1082 ieee80211_wake_queues_by_reason(&local
->hw
,
1083 IEEE80211_QUEUE_STOP_REASON_PS
);
1086 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1088 struct ieee80211_local
*local
=
1089 container_of(work
, struct ieee80211_local
,
1090 dynamic_ps_enable_work
);
1091 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1092 struct ieee80211_if_managed
*ifmgd
;
1093 unsigned long flags
;
1096 /* can only happen when PS was just disabled anyway */
1100 ifmgd
= &sdata
->u
.mgd
;
1102 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1105 if (!local
->disable_dynamic_ps
&&
1106 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1107 /* don't enter PS if TX frames are pending */
1108 if (drv_tx_frames_pending(local
)) {
1109 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1111 local
->hw
.conf
.dynamic_ps_timeout
));
1116 * transmission can be stopped by others which leads to
1117 * dynamic_ps_timer expiry. Postpone the ps timer if it
1118 * is not the actual idle state.
1120 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1121 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1122 if (local
->queue_stop_reasons
[q
]) {
1123 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1125 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1127 local
->hw
.conf
.dynamic_ps_timeout
));
1131 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1134 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1135 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1136 netif_tx_stop_all_queues(sdata
->dev
);
1138 if (drv_tx_frames_pending(local
))
1139 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1141 local
->hw
.conf
.dynamic_ps_timeout
));
1143 ieee80211_send_nullfunc(local
, sdata
, 1);
1144 /* Flush to get the tx status of nullfunc frame */
1145 drv_flush(local
, false);
1149 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1150 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1151 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1152 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1153 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1154 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1157 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1158 netif_tx_wake_all_queues(sdata
->dev
);
1161 void ieee80211_dynamic_ps_timer(unsigned long data
)
1163 struct ieee80211_local
*local
= (void *) data
;
1165 if (local
->quiescing
|| local
->suspended
)
1168 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1172 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1173 struct ieee80211_sub_if_data
*sdata
,
1174 u8
*wmm_param
, size_t wmm_param_len
)
1176 struct ieee80211_tx_queue_params params
;
1177 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1180 u8
*pos
, uapsd_queues
= 0;
1182 if (!local
->ops
->conf_tx
)
1185 if (local
->hw
.queues
< 4)
1191 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1194 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1195 uapsd_queues
= ifmgd
->uapsd_queues
;
1197 count
= wmm_param
[6] & 0x0f;
1198 if (count
== ifmgd
->wmm_last_param_set
)
1200 ifmgd
->wmm_last_param_set
= count
;
1202 pos
= wmm_param
+ 8;
1203 left
= wmm_param_len
- 8;
1205 memset(¶ms
, 0, sizeof(params
));
1208 for (; left
>= 4; left
-= 4, pos
+= 4) {
1209 int aci
= (pos
[0] >> 5) & 0x03;
1210 int acm
= (pos
[0] >> 4) & 0x01;
1218 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1219 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1225 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1226 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1232 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1233 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1240 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1241 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1246 params
.aifs
= pos
[0] & 0x0f;
1247 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1248 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1249 params
.txop
= get_unaligned_le16(pos
+ 2);
1250 params
.uapsd
= uapsd
;
1252 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1253 wiphy_debug(local
->hw
.wiphy
,
1254 "WMM queue=%d aci=%d acm=%d aifs=%d "
1255 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1257 params
.aifs
, params
.cw_min
, params
.cw_max
,
1258 params
.txop
, params
.uapsd
);
1260 sdata
->tx_conf
[queue
] = params
;
1261 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1262 wiphy_debug(local
->hw
.wiphy
,
1263 "failed to set TX queue parameters for queue %d\n",
1267 /* enable WMM or activate new settings */
1268 sdata
->vif
.bss_conf
.qos
= true;
1271 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1272 u16 capab
, bool erp_valid
, u8 erp
)
1274 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1276 bool use_protection
;
1277 bool use_short_preamble
;
1278 bool use_short_slot
;
1281 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1282 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1284 use_protection
= false;
1285 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1288 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1289 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
1290 use_short_slot
= true;
1292 if (use_protection
!= bss_conf
->use_cts_prot
) {
1293 bss_conf
->use_cts_prot
= use_protection
;
1294 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1297 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1298 bss_conf
->use_short_preamble
= use_short_preamble
;
1299 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1302 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1303 bss_conf
->use_short_slot
= use_short_slot
;
1304 changed
|= BSS_CHANGED_ERP_SLOT
;
1310 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1311 struct cfg80211_bss
*cbss
,
1312 u32 bss_info_changed
)
1314 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1315 struct ieee80211_local
*local
= sdata
->local
;
1316 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1318 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1319 /* set timing information */
1320 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1321 bss_conf
->last_tsf
= cbss
->tsf
;
1323 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1324 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1325 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1327 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1328 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1330 sdata
->u
.mgd
.associated
= cbss
;
1331 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1333 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1335 /* just to be sure */
1336 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1337 IEEE80211_STA_BEACON_POLL
);
1339 ieee80211_led_assoc(local
, 1);
1341 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1342 bss_conf
->dtim_period
= bss
->dtim_period
;
1344 bss_conf
->dtim_period
= 0;
1346 bss_conf
->assoc
= 1;
1348 /* Tell the driver to monitor connection quality (if supported) */
1349 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1350 bss_conf
->cqm_rssi_thold
)
1351 bss_info_changed
|= BSS_CHANGED_CQM
;
1353 /* Enable ARP filtering */
1354 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1355 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1356 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1359 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1361 mutex_lock(&local
->iflist_mtx
);
1362 ieee80211_recalc_ps(local
, -1);
1363 ieee80211_recalc_smps(local
);
1364 mutex_unlock(&local
->iflist_mtx
);
1366 netif_tx_start_all_queues(sdata
->dev
);
1367 netif_carrier_on(sdata
->dev
);
1370 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1371 u16 stype
, u16 reason
, bool tx
,
1374 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1375 struct ieee80211_local
*local
= sdata
->local
;
1376 struct sta_info
*sta
;
1380 ASSERT_MGD_MTX(ifmgd
);
1382 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1385 if (WARN_ON(!ifmgd
->associated
))
1388 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1390 ifmgd
->associated
= NULL
;
1391 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1394 * we need to commit the associated = NULL change because the
1395 * scan code uses that to determine whether this iface should
1396 * go to/wake up from powersave or not -- and could otherwise
1397 * wake the queues erroneously.
1402 * Thus, we can only afterwards stop the queues -- to account
1403 * for the case where another CPU is finishing a scan at this
1404 * time -- we don't want the scan code to enable queues.
1407 netif_tx_stop_all_queues(sdata
->dev
);
1408 netif_carrier_off(sdata
->dev
);
1410 mutex_lock(&local
->sta_mtx
);
1411 sta
= sta_info_get(sdata
, bssid
);
1413 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1414 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1416 mutex_unlock(&local
->sta_mtx
);
1418 /* deauthenticate/disassociate now */
1419 if (tx
|| frame_buf
)
1420 ieee80211_send_deauth_disassoc(sdata
, bssid
, stype
, reason
,
1423 /* flush out frame */
1425 drv_flush(local
, false);
1427 /* remove AP and TDLS peers */
1428 sta_info_flush(local
, sdata
);
1430 /* finally reset all BSS / config parameters */
1431 changed
|= ieee80211_reset_erp_info(sdata
);
1433 ieee80211_led_assoc(local
, 0);
1434 changed
|= BSS_CHANGED_ASSOC
;
1435 sdata
->vif
.bss_conf
.assoc
= false;
1437 /* on the next assoc, re-program HT parameters */
1438 sdata
->ht_opmode_valid
= false;
1439 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1440 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1442 local
->power_constr_level
= 0;
1444 del_timer_sync(&local
->dynamic_ps_timer
);
1445 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1447 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1448 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1449 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1451 local
->ps_sdata
= NULL
;
1453 /* Disable ARP filtering */
1454 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1455 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1456 changed
|= BSS_CHANGED_ARP_FILTER
;
1459 sdata
->vif
.bss_conf
.qos
= false;
1460 changed
|= BSS_CHANGED_QOS
;
1462 /* The BSSID (not really interesting) and HT changed */
1463 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1464 ieee80211_bss_info_change_notify(sdata
, changed
);
1466 /* channel(_type) changes are handled by ieee80211_hw_config */
1467 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1468 ieee80211_hw_config(local
, 0);
1470 /* disassociated - set to defaults now */
1471 ieee80211_set_wmm_default(sdata
, false);
1473 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1474 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1475 del_timer_sync(&sdata
->u
.mgd
.timer
);
1476 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1479 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1480 struct ieee80211_hdr
*hdr
)
1483 * We can postpone the mgd.timer whenever receiving unicast frames
1484 * from AP because we know that the connection is working both ways
1485 * at that time. But multicast frames (and hence also beacons) must
1486 * be ignored here, because we need to trigger the timer during
1487 * data idle periods for sending the periodic probe request to the
1488 * AP we're connected to.
1490 if (is_multicast_ether_addr(hdr
->addr1
))
1493 ieee80211_sta_reset_conn_monitor(sdata
);
1496 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1498 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1500 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1501 IEEE80211_STA_CONNECTION_POLL
)))
1504 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1505 IEEE80211_STA_BEACON_POLL
);
1506 mutex_lock(&sdata
->local
->iflist_mtx
);
1507 ieee80211_recalc_ps(sdata
->local
, -1);
1508 mutex_unlock(&sdata
->local
->iflist_mtx
);
1510 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1514 * We've received a probe response, but are not sure whether
1515 * we have or will be receiving any beacons or data, so let's
1516 * schedule the timers again, just in case.
1518 ieee80211_sta_reset_beacon_monitor(sdata
);
1520 mod_timer(&ifmgd
->conn_mon_timer
,
1521 round_jiffies_up(jiffies
+
1522 IEEE80211_CONNECTION_IDLE_TIME
));
1525 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1526 struct ieee80211_hdr
*hdr
, bool ack
)
1528 if (!ieee80211_is_data(hdr
->frame_control
))
1532 ieee80211_sta_reset_conn_monitor(sdata
);
1534 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1535 sdata
->u
.mgd
.probe_send_count
> 0) {
1537 sdata
->u
.mgd
.probe_send_count
= 0;
1539 sdata
->u
.mgd
.nullfunc_failed
= true;
1540 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1544 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1546 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1548 u8
*dst
= ifmgd
->associated
->bssid
;
1549 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1552 * Try sending broadcast probe requests for the last three
1553 * probe requests after the first ones failed since some
1554 * buggy APs only support broadcast probe requests.
1556 if (ifmgd
->probe_send_count
>= unicast_limit
)
1560 * When the hardware reports an accurate Tx ACK status, it's
1561 * better to send a nullfunc frame instead of a probe request,
1562 * as it will kick us off the AP quickly if we aren't associated
1563 * anymore. The timeout will be reset if the frame is ACKed by
1566 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1567 ifmgd
->nullfunc_failed
= false;
1568 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1570 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1571 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1572 (u32
) -1, true, false);
1575 ifmgd
->probe_send_count
++;
1576 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1577 run_again(ifmgd
, ifmgd
->probe_timeout
);
1580 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1583 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1584 bool already
= false;
1586 if (!ieee80211_sdata_running(sdata
))
1589 if (sdata
->local
->scanning
)
1592 if (sdata
->local
->tmp_channel
)
1595 mutex_lock(&ifmgd
->mtx
);
1597 if (!ifmgd
->associated
)
1600 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1601 if (beacon
&& net_ratelimit())
1602 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1603 "- sending probe request\n", sdata
->name
);
1607 * The driver/our work has already reported this event or the
1608 * connection monitoring has kicked in and we have already sent
1609 * a probe request. Or maybe the AP died and the driver keeps
1610 * reporting until we disassociate...
1612 * In either case we have to ignore the current call to this
1613 * function (except for setting the correct probe reason bit)
1614 * because otherwise we would reset the timer every time and
1615 * never check whether we received a probe response!
1617 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1618 IEEE80211_STA_CONNECTION_POLL
))
1622 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1624 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1629 mutex_lock(&sdata
->local
->iflist_mtx
);
1630 ieee80211_recalc_ps(sdata
->local
, -1);
1631 mutex_unlock(&sdata
->local
->iflist_mtx
);
1633 ifmgd
->probe_send_count
= 0;
1634 ieee80211_mgd_probe_ap_send(sdata
);
1636 mutex_unlock(&ifmgd
->mtx
);
1639 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1640 struct ieee80211_vif
*vif
)
1642 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1643 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1644 struct sk_buff
*skb
;
1647 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1650 ASSERT_MGD_MTX(ifmgd
);
1652 if (!ifmgd
->associated
)
1655 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1656 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1657 (u32
) -1, ssid
+ 2, ssid
[1],
1662 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1664 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1666 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1667 struct ieee80211_local
*local
= sdata
->local
;
1669 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
1671 mutex_lock(&ifmgd
->mtx
);
1672 if (!ifmgd
->associated
) {
1673 mutex_unlock(&ifmgd
->mtx
);
1677 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1679 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1680 sdata
->name
, bssid
);
1682 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1683 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1685 mutex_unlock(&ifmgd
->mtx
);
1688 * must be outside lock due to cfg80211,
1689 * but that's not a problem.
1691 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
1693 mutex_lock(&local
->mtx
);
1694 ieee80211_recalc_idle(local
);
1695 mutex_unlock(&local
->mtx
);
1698 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1700 struct ieee80211_sub_if_data
*sdata
=
1701 container_of(work
, struct ieee80211_sub_if_data
,
1702 u
.mgd
.beacon_connection_loss_work
);
1703 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1704 struct sta_info
*sta
;
1706 if (ifmgd
->associated
) {
1708 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
1710 sta
->beacon_loss_count
++;
1714 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1715 __ieee80211_connection_loss(sdata
);
1717 ieee80211_mgd_probe_ap(sdata
, true);
1720 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1722 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1723 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1725 trace_api_beacon_loss(sdata
);
1727 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1728 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1730 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1732 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1734 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1735 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1737 trace_api_connection_loss(sdata
);
1739 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1740 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1742 EXPORT_SYMBOL(ieee80211_connection_loss
);
1745 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
1748 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1750 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1753 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
1755 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1756 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1759 cfg80211_put_bss(auth_data
->bss
);
1761 sdata
->u
.mgd
.auth_data
= NULL
;
1764 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1765 struct ieee80211_mgmt
*mgmt
, size_t len
)
1767 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
1769 struct ieee802_11_elems elems
;
1771 pos
= mgmt
->u
.auth
.variable
;
1772 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1773 if (!elems
.challenge
)
1775 auth_data
->expected_transaction
= 4;
1776 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
,
1777 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1778 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
1779 auth_data
->key
, auth_data
->key_len
,
1780 auth_data
->key_idx
);
1783 static enum rx_mgmt_action __must_check
1784 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1785 struct ieee80211_mgmt
*mgmt
, size_t len
)
1787 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1789 u16 auth_alg
, auth_transaction
, status_code
;
1790 struct sta_info
*sta
;
1792 lockdep_assert_held(&ifmgd
->mtx
);
1795 return RX_MGMT_NONE
;
1797 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
1798 return RX_MGMT_NONE
;
1800 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
1802 if (compare_ether_addr(bssid
, mgmt
->bssid
))
1803 return RX_MGMT_NONE
;
1805 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1806 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1807 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1809 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
1810 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
)
1811 return RX_MGMT_NONE
;
1813 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1814 printk(KERN_DEBUG
"%s: %pM denied authentication (status %d)\n",
1815 sdata
->name
, mgmt
->sa
, status_code
);
1819 switch (ifmgd
->auth_data
->algorithm
) {
1820 case WLAN_AUTH_OPEN
:
1821 case WLAN_AUTH_LEAP
:
1824 case WLAN_AUTH_SHARED_KEY
:
1825 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
1826 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1827 /* need another frame */
1828 return RX_MGMT_NONE
;
1832 WARN_ONCE(1, "invalid auth alg %d",
1833 ifmgd
->auth_data
->algorithm
);
1834 return RX_MGMT_NONE
;
1837 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->name
);
1839 ifmgd
->auth_data
->done
= true;
1840 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
1841 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
1843 /* move station state to auth */
1844 mutex_lock(&sdata
->local
->sta_mtx
);
1845 sta
= sta_info_get(sdata
, bssid
);
1847 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
1850 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
1851 printk(KERN_DEBUG
"%s: failed moving %pM to auth\n",
1852 sdata
->name
, bssid
);
1855 mutex_unlock(&sdata
->local
->sta_mtx
);
1857 return RX_MGMT_CFG80211_RX_AUTH
;
1859 mutex_unlock(&sdata
->local
->sta_mtx
);
1860 /* ignore frame -- wait for timeout */
1861 return RX_MGMT_NONE
;
1865 static enum rx_mgmt_action __must_check
1866 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1867 struct ieee80211_mgmt
*mgmt
, size_t len
)
1869 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1870 const u8
*bssid
= NULL
;
1873 lockdep_assert_held(&ifmgd
->mtx
);
1876 return RX_MGMT_NONE
;
1878 if (!ifmgd
->associated
||
1879 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1880 return RX_MGMT_NONE
;
1882 bssid
= ifmgd
->associated
->bssid
;
1884 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1886 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1887 sdata
->name
, bssid
, reason_code
);
1889 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1891 mutex_lock(&sdata
->local
->mtx
);
1892 ieee80211_recalc_idle(sdata
->local
);
1893 mutex_unlock(&sdata
->local
->mtx
);
1895 return RX_MGMT_CFG80211_DEAUTH
;
1899 static enum rx_mgmt_action __must_check
1900 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1901 struct ieee80211_mgmt
*mgmt
, size_t len
)
1903 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1906 lockdep_assert_held(&ifmgd
->mtx
);
1909 return RX_MGMT_NONE
;
1911 if (!ifmgd
->associated
||
1912 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
1913 return RX_MGMT_NONE
;
1915 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1917 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1918 sdata
->name
, mgmt
->sa
, reason_code
);
1920 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
1922 mutex_lock(&sdata
->local
->mtx
);
1923 ieee80211_recalc_idle(sdata
->local
);
1924 mutex_unlock(&sdata
->local
->mtx
);
1926 return RX_MGMT_CFG80211_DISASSOC
;
1929 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1930 u8
*supp_rates
, unsigned int supp_rates_len
,
1931 u32
*rates
, u32
*basic_rates
,
1932 bool *have_higher_than_11mbit
,
1933 int *min_rate
, int *min_rate_index
)
1937 for (i
= 0; i
< supp_rates_len
; i
++) {
1938 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1939 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1942 *have_higher_than_11mbit
= true;
1945 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1946 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1948 * Note: Even through the membership selector and the basic
1949 * rate flag share the same bit, they are not exactly
1952 if (!!(supp_rates
[i
] & 0x80) &&
1953 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1956 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1957 if (sband
->bitrates
[j
].bitrate
== rate
) {
1960 *basic_rates
|= BIT(j
);
1961 if (rate
< *min_rate
) {
1963 *min_rate_index
= j
;
1971 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
1974 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
1976 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
1979 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
1981 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
1982 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
1986 sdata
->u
.mgd
.assoc_data
= NULL
;
1989 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
1990 struct cfg80211_bss
*cbss
,
1991 struct ieee80211_mgmt
*mgmt
, size_t len
)
1993 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1994 struct ieee80211_local
*local
= sdata
->local
;
1995 struct ieee80211_supported_band
*sband
;
1996 struct sta_info
*sta
;
1998 u16 capab_info
, aid
;
1999 struct ieee802_11_elems elems
;
2000 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2003 u16 ap_ht_cap_flags
;
2005 /* AssocResp and ReassocResp have identical structure */
2007 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2008 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2010 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2012 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2014 aid
&= ~(BIT(15) | BIT(14));
2016 ifmgd
->broken_ap
= false;
2018 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2020 "%s: invalid AID value %d (out of range), turn off PS\n",
2023 ifmgd
->broken_ap
= true;
2026 pos
= mgmt
->u
.assoc_resp
.variable
;
2027 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2029 if (!elems
.supp_rates
) {
2030 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
2037 mutex_lock(&sdata
->local
->sta_mtx
);
2039 * station info was already allocated and inserted before
2040 * the association and should be available to us
2042 sta
= sta_info_get(sdata
, cbss
->bssid
);
2043 if (WARN_ON(!sta
)) {
2044 mutex_unlock(&sdata
->local
->sta_mtx
);
2048 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
2050 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2051 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2052 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2054 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
2056 rate_control_rate_init(sta
);
2058 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2059 set_sta_flag(sta
, WLAN_STA_MFP
);
2061 if (elems
.wmm_param
)
2062 set_sta_flag(sta
, WLAN_STA_WME
);
2064 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTH
);
2066 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2067 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2068 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2071 "%s: failed to move station %pM to desired state\n",
2072 sdata
->name
, sta
->sta
.addr
);
2073 WARN_ON(__sta_info_destroy(sta
));
2074 mutex_unlock(&sdata
->local
->sta_mtx
);
2078 mutex_unlock(&sdata
->local
->sta_mtx
);
2081 * Always handle WMM once after association regardless
2082 * of the first value the AP uses. Setting -1 here has
2083 * that effect because the AP values is an unsigned
2086 ifmgd
->wmm_last_param_set
= -1;
2088 if (elems
.wmm_param
)
2089 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2090 elems
.wmm_param_len
);
2092 ieee80211_set_wmm_default(sdata
, false);
2093 changed
|= BSS_CHANGED_QOS
;
2095 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
2096 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
2097 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
2098 cbss
->bssid
, ap_ht_cap_flags
,
2101 /* set AID and assoc capability,
2102 * ieee80211_set_associated() will tell the driver */
2103 bss_conf
->aid
= aid
;
2104 bss_conf
->assoc_capability
= capab_info
;
2105 ieee80211_set_associated(sdata
, cbss
, changed
);
2108 * If we're using 4-addr mode, let the AP know that we're
2109 * doing so, so that it can create the STA VLAN on its side
2111 if (ifmgd
->use_4addr
)
2112 ieee80211_send_4addr_nullfunc(local
, sdata
);
2115 * Start timer to probe the connection to the AP now.
2116 * Also start the timer that will detect beacon loss.
2118 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2119 ieee80211_sta_reset_beacon_monitor(sdata
);
2124 static enum rx_mgmt_action __must_check
2125 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2126 struct ieee80211_mgmt
*mgmt
, size_t len
,
2127 struct cfg80211_bss
**bss
)
2129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2130 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2131 u16 capab_info
, status_code
, aid
;
2132 struct ieee802_11_elems elems
;
2136 lockdep_assert_held(&ifmgd
->mtx
);
2139 return RX_MGMT_NONE
;
2140 if (compare_ether_addr(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2141 return RX_MGMT_NONE
;
2144 * AssocResp and ReassocResp have identical structure, so process both
2145 * of them in this function.
2149 return RX_MGMT_NONE
;
2151 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2152 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2153 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2154 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2156 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
2157 "status=%d aid=%d)\n",
2158 sdata
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
2159 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2161 pos
= mgmt
->u
.assoc_resp
.variable
;
2162 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2164 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2165 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2166 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2168 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2169 ms
= tu
* 1024 / 1000;
2170 printk(KERN_DEBUG
"%s: %pM rejected association temporarily; "
2171 "comeback duration %u TU (%u ms)\n",
2172 sdata
->name
, mgmt
->sa
, tu
, ms
);
2173 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2174 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2175 run_again(ifmgd
, assoc_data
->timeout
);
2176 return RX_MGMT_NONE
;
2179 *bss
= assoc_data
->bss
;
2181 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2182 printk(KERN_DEBUG
"%s: %pM denied association (code=%d)\n",
2183 sdata
->name
, mgmt
->sa
, status_code
);
2184 ieee80211_destroy_assoc_data(sdata
, false);
2186 printk(KERN_DEBUG
"%s: associated\n", sdata
->name
);
2188 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2189 /* oops -- internal error -- send timeout for now */
2190 ieee80211_destroy_assoc_data(sdata
, true);
2191 sta_info_destroy_addr(sdata
, mgmt
->bssid
);
2192 cfg80211_put_bss(*bss
);
2193 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2197 * destroy assoc_data afterwards, as otherwise an idle
2198 * recalc after assoc_data is NULL but before associated
2199 * is set can cause the interface to go idle
2201 ieee80211_destroy_assoc_data(sdata
, true);
2204 return RX_MGMT_CFG80211_RX_ASSOC
;
2206 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2207 struct ieee80211_mgmt
*mgmt
,
2209 struct ieee80211_rx_status
*rx_status
,
2210 struct ieee802_11_elems
*elems
,
2213 struct ieee80211_local
*local
= sdata
->local
;
2215 struct ieee80211_bss
*bss
;
2216 struct ieee80211_channel
*channel
;
2217 bool need_ps
= false;
2219 if (sdata
->u
.mgd
.associated
&&
2220 compare_ether_addr(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)
2222 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
2223 /* not previously set so we may need to recalc */
2224 need_ps
= !bss
->dtim_period
;
2227 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2228 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2231 freq
= rx_status
->freq
;
2233 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2235 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2238 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2241 ieee80211_rx_bss_put(local
, bss
);
2243 if (!sdata
->u
.mgd
.associated
)
2247 mutex_lock(&local
->iflist_mtx
);
2248 ieee80211_recalc_ps(local
, -1);
2249 mutex_unlock(&local
->iflist_mtx
);
2252 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
2253 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
2255 struct ieee80211_channel_sw_ie
*sw_elem
=
2256 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
2257 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
2258 bss
, rx_status
->mactime
);
2263 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2264 struct sk_buff
*skb
)
2266 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2267 struct ieee80211_if_managed
*ifmgd
;
2268 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2269 size_t baselen
, len
= skb
->len
;
2270 struct ieee802_11_elems elems
;
2272 ifmgd
= &sdata
->u
.mgd
;
2274 ASSERT_MGD_MTX(ifmgd
);
2276 if (compare_ether_addr(mgmt
->da
, sdata
->vif
.addr
))
2277 return; /* ignore ProbeResp to foreign address */
2279 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2283 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2286 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
2288 if (ifmgd
->associated
&&
2289 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
) == 0)
2290 ieee80211_reset_ap_probe(sdata
);
2292 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2293 compare_ether_addr(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)
2295 /* got probe response, continue with auth */
2296 printk(KERN_DEBUG
"%s: direct probe responded\n", sdata
->name
);
2297 ifmgd
->auth_data
->tries
= 0;
2298 ifmgd
->auth_data
->timeout
= jiffies
;
2299 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2304 * This is the canonical list of information elements we care about,
2305 * the filter code also gives us all changes to the Microsoft OUI
2306 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2308 * We implement beacon filtering in software since that means we can
2309 * avoid processing the frame here and in cfg80211, and userspace
2310 * will not be able to tell whether the hardware supports it or not.
2312 * XXX: This list needs to be dynamic -- userspace needs to be able to
2313 * add items it requires. It also needs to be able to tell us to
2314 * look out for other vendor IEs.
2316 static const u64 care_about_ies
=
2317 (1ULL << WLAN_EID_COUNTRY
) |
2318 (1ULL << WLAN_EID_ERP_INFO
) |
2319 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2320 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2321 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2322 (1ULL << WLAN_EID_HT_INFORMATION
);
2324 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2325 struct ieee80211_mgmt
*mgmt
,
2327 struct ieee80211_rx_status
*rx_status
)
2329 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2330 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2332 struct ieee802_11_elems elems
;
2333 struct ieee80211_local
*local
= sdata
->local
;
2335 bool erp_valid
, directed_tim
= false;
2340 lockdep_assert_held(&ifmgd
->mtx
);
2342 /* Process beacon from the current BSS */
2343 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2347 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
2350 if (ifmgd
->assoc_data
&& !ifmgd
->assoc_data
->have_beacon
&&
2351 compare_ether_addr(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)
2353 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2354 len
- baselen
, &elems
);
2356 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2358 ifmgd
->assoc_data
->have_beacon
= true;
2359 ifmgd
->assoc_data
->sent_assoc
= false;
2360 /* continue assoc process */
2361 ifmgd
->assoc_data
->timeout
= jiffies
;
2362 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2366 if (!ifmgd
->associated
||
2367 compare_ether_addr(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2369 bssid
= ifmgd
->associated
->bssid
;
2371 /* Track average RSSI from the Beacon frames of the current AP */
2372 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2373 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2374 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2375 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2376 ifmgd
->last_cqm_event_signal
= 0;
2377 ifmgd
->count_beacon_signal
= 1;
2378 ifmgd
->last_ave_beacon_signal
= 0;
2380 ifmgd
->ave_beacon_signal
=
2381 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2382 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2383 ifmgd
->ave_beacon_signal
) / 16;
2384 ifmgd
->count_beacon_signal
++;
2387 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2388 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2389 int sig
= ifmgd
->ave_beacon_signal
;
2390 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2393 * if signal crosses either of the boundaries, invoke callback
2394 * with appropriate parameters
2396 if (sig
> ifmgd
->rssi_max_thold
&&
2397 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2398 ifmgd
->last_ave_beacon_signal
= sig
;
2399 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
2400 } else if (sig
< ifmgd
->rssi_min_thold
&&
2401 (last_sig
>= ifmgd
->rssi_max_thold
||
2403 ifmgd
->last_ave_beacon_signal
= sig
;
2404 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
2408 if (bss_conf
->cqm_rssi_thold
&&
2409 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2410 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2411 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2412 int last_event
= ifmgd
->last_cqm_event_signal
;
2413 int thold
= bss_conf
->cqm_rssi_thold
;
2414 int hyst
= bss_conf
->cqm_rssi_hyst
;
2416 (last_event
== 0 || sig
< last_event
- hyst
)) {
2417 ifmgd
->last_cqm_event_signal
= sig
;
2418 ieee80211_cqm_rssi_notify(
2420 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2422 } else if (sig
> thold
&&
2423 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2424 ifmgd
->last_cqm_event_signal
= sig
;
2425 ieee80211_cqm_rssi_notify(
2427 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2432 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2433 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2434 if (net_ratelimit()) {
2435 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
2436 "to a received beacon\n", sdata
->name
);
2439 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2440 mutex_lock(&local
->iflist_mtx
);
2441 ieee80211_recalc_ps(local
, -1);
2442 mutex_unlock(&local
->iflist_mtx
);
2446 * Push the beacon loss detection into the future since
2447 * we are processing a beacon from the AP just now.
2449 ieee80211_sta_reset_beacon_monitor(sdata
);
2451 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2452 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2453 len
- baselen
, &elems
,
2454 care_about_ies
, ncrc
);
2456 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2457 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
2460 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
2461 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
2464 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2465 elems
.wmm_param_len
);
2468 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2470 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2471 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2472 ieee80211_hw_config(local
,
2473 IEEE80211_CONF_CHANGE_PS
);
2474 ieee80211_send_nullfunc(local
, sdata
, 0);
2476 local
->pspolling
= true;
2479 * Here is assumed that the driver will be
2480 * able to send ps-poll frame and receive a
2481 * response even though power save mode is
2482 * enabled, but some drivers might require
2483 * to disable power save here. This needs
2484 * to be investigated.
2486 ieee80211_send_pspoll(local
, sdata
);
2491 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2493 ifmgd
->beacon_crc
= ncrc
;
2494 ifmgd
->beacon_crc_valid
= true;
2496 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
2498 erp_value
= elems
.erp_info
[0];
2502 changed
|= ieee80211_handle_bss_capability(sdata
,
2503 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
2504 erp_valid
, erp_value
);
2507 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
2508 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
2509 struct sta_info
*sta
;
2510 struct ieee80211_supported_band
*sband
;
2511 u16 ap_ht_cap_flags
;
2515 sta
= sta_info_get(sdata
, bssid
);
2516 if (WARN_ON(!sta
)) {
2521 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2523 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2524 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2526 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
2530 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
2531 bssid
, ap_ht_cap_flags
, true);
2534 /* Note: country IE parsing is done for us by cfg80211 */
2535 if (elems
.country_elem
) {
2536 /* TODO: IBSS also needs this */
2537 if (elems
.pwr_constr_elem
)
2538 ieee80211_handle_pwr_constr(sdata
,
2539 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2540 elems
.pwr_constr_elem
,
2541 elems
.pwr_constr_elem_len
);
2544 ieee80211_bss_info_change_notify(sdata
, changed
);
2547 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2548 struct sk_buff
*skb
)
2550 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2551 struct ieee80211_rx_status
*rx_status
;
2552 struct ieee80211_mgmt
*mgmt
;
2553 struct cfg80211_bss
*bss
= NULL
;
2554 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2557 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2558 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2559 fc
= le16_to_cpu(mgmt
->frame_control
);
2561 mutex_lock(&ifmgd
->mtx
);
2563 switch (fc
& IEEE80211_FCTL_STYPE
) {
2564 case IEEE80211_STYPE_BEACON
:
2565 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2567 case IEEE80211_STYPE_PROBE_RESP
:
2568 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2570 case IEEE80211_STYPE_AUTH
:
2571 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2573 case IEEE80211_STYPE_DEAUTH
:
2574 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2576 case IEEE80211_STYPE_DISASSOC
:
2577 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2579 case IEEE80211_STYPE_ASSOC_RESP
:
2580 case IEEE80211_STYPE_REASSOC_RESP
:
2581 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
2583 case IEEE80211_STYPE_ACTION
:
2584 switch (mgmt
->u
.action
.category
) {
2585 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2586 ieee80211_sta_process_chanswitch(sdata
,
2587 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2588 (void *)ifmgd
->associated
->priv
,
2589 rx_status
->mactime
);
2593 mutex_unlock(&ifmgd
->mtx
);
2599 case RX_MGMT_CFG80211_DEAUTH
:
2600 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2602 case RX_MGMT_CFG80211_DISASSOC
:
2603 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2605 case RX_MGMT_CFG80211_RX_AUTH
:
2606 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2608 case RX_MGMT_CFG80211_RX_ASSOC
:
2609 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
2611 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
2612 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2615 WARN(1, "unexpected: %d", rma
);
2619 static void ieee80211_sta_timer(unsigned long data
)
2621 struct ieee80211_sub_if_data
*sdata
=
2622 (struct ieee80211_sub_if_data
*) data
;
2623 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2624 struct ieee80211_local
*local
= sdata
->local
;
2626 if (local
->quiescing
) {
2627 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2631 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2634 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2635 u8
*bssid
, u8 reason
)
2637 struct ieee80211_local
*local
= sdata
->local
;
2638 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2639 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
2641 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2642 IEEE80211_STA_BEACON_POLL
);
2644 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
2646 mutex_unlock(&ifmgd
->mtx
);
2649 * must be outside lock due to cfg80211,
2650 * but that's not a problem.
2652 cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
2654 mutex_lock(&local
->mtx
);
2655 ieee80211_recalc_idle(local
);
2656 mutex_unlock(&local
->mtx
);
2658 mutex_lock(&ifmgd
->mtx
);
2661 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
2663 struct ieee80211_local
*local
= sdata
->local
;
2664 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2665 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
2667 lockdep_assert_held(&ifmgd
->mtx
);
2669 if (WARN_ON_ONCE(!auth_data
))
2674 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
2675 printk(KERN_DEBUG
"%s: authentication with %pM timed out\n",
2676 sdata
->name
, auth_data
->bss
->bssid
);
2679 * Most likely AP is not in the range so remove the
2680 * bss struct for that AP.
2682 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
2687 if (auth_data
->bss
->proberesp_ies
) {
2688 printk(KERN_DEBUG
"%s: send auth to %pM (try %d/%d)\n",
2689 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2690 IEEE80211_AUTH_MAX_TRIES
);
2692 auth_data
->expected_transaction
= 2;
2693 ieee80211_send_auth(sdata
, 1, auth_data
->algorithm
,
2694 auth_data
->ie
, auth_data
->ie_len
,
2695 auth_data
->bss
->bssid
,
2696 auth_data
->bss
->bssid
, NULL
, 0, 0);
2700 printk(KERN_DEBUG
"%s: direct probe to %pM (try %d/%i)\n",
2701 sdata
->name
, auth_data
->bss
->bssid
, auth_data
->tries
,
2702 IEEE80211_AUTH_MAX_TRIES
);
2704 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
2708 * Direct probe is sent to broadcast address as some APs
2709 * will not answer to direct packet in unassociated state.
2711 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
2712 NULL
, 0, (u32
) -1, true, false);
2715 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
2716 run_again(ifmgd
, auth_data
->timeout
);
2721 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
2723 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2724 struct ieee80211_local
*local
= sdata
->local
;
2726 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2728 assoc_data
->tries
++;
2729 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
2730 printk(KERN_DEBUG
"%s: association with %pM timed out\n",
2731 sdata
->name
, assoc_data
->bss
->bssid
);
2734 * Most likely AP is not in the range so remove the
2735 * bss struct for that AP.
2737 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
2742 printk(KERN_DEBUG
"%s: associate with %pM (try %d/%d)\n",
2743 sdata
->name
, assoc_data
->bss
->bssid
, assoc_data
->tries
,
2744 IEEE80211_ASSOC_MAX_TRIES
);
2745 ieee80211_send_assoc(sdata
);
2747 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
2748 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
2753 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2755 struct ieee80211_local
*local
= sdata
->local
;
2756 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2758 mutex_lock(&ifmgd
->mtx
);
2760 if (ifmgd
->auth_data
&&
2761 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
2762 if (ifmgd
->auth_data
->done
) {
2764 * ok ... we waited for assoc but userspace didn't,
2765 * so let's just kill the auth data
2767 ieee80211_destroy_auth_data(sdata
, false);
2768 } else if (ieee80211_probe_auth(sdata
)) {
2771 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2773 ieee80211_destroy_auth_data(sdata
, false);
2775 mutex_unlock(&ifmgd
->mtx
);
2776 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
2777 mutex_lock(&ifmgd
->mtx
);
2779 } else if (ifmgd
->auth_data
)
2780 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2782 if (ifmgd
->assoc_data
&&
2783 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
2784 if (!ifmgd
->assoc_data
->have_beacon
||
2785 ieee80211_do_assoc(sdata
)) {
2788 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
2790 ieee80211_destroy_assoc_data(sdata
, false);
2792 mutex_unlock(&ifmgd
->mtx
);
2793 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
2794 mutex_lock(&ifmgd
->mtx
);
2796 } else if (ifmgd
->assoc_data
)
2797 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2799 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2800 IEEE80211_STA_CONNECTION_POLL
) &&
2801 ifmgd
->associated
) {
2805 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2807 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2808 max_tries
= max_nullfunc_tries
;
2810 max_tries
= max_probe_tries
;
2812 /* ACK received for nullfunc probing frame */
2813 if (!ifmgd
->probe_send_count
)
2814 ieee80211_reset_ap_probe(sdata
);
2815 else if (ifmgd
->nullfunc_failed
) {
2816 if (ifmgd
->probe_send_count
< max_tries
) {
2817 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2818 wiphy_debug(local
->hw
.wiphy
,
2819 "%s: No ack for nullfunc frame to"
2820 " AP %pM, try %d/%i\n",
2822 ifmgd
->probe_send_count
, max_tries
);
2824 ieee80211_mgd_probe_ap_send(sdata
);
2826 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2827 wiphy_debug(local
->hw
.wiphy
,
2828 "%s: No ack for nullfunc frame to"
2829 " AP %pM, disconnecting.\n",
2830 sdata
->name
, bssid
);
2832 ieee80211_sta_connection_lost(sdata
, bssid
,
2833 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2835 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2836 run_again(ifmgd
, ifmgd
->probe_timeout
);
2837 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2838 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2839 wiphy_debug(local
->hw
.wiphy
,
2840 "%s: Failed to send nullfunc to AP %pM"
2841 " after %dms, disconnecting.\n",
2843 bssid
, probe_wait_ms
);
2845 ieee80211_sta_connection_lost(sdata
, bssid
,
2846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2847 } else if (ifmgd
->probe_send_count
< max_tries
) {
2848 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2849 wiphy_debug(local
->hw
.wiphy
,
2850 "%s: No probe response from AP %pM"
2851 " after %dms, try %d/%i\n",
2853 bssid
, probe_wait_ms
,
2854 ifmgd
->probe_send_count
, max_tries
);
2856 ieee80211_mgd_probe_ap_send(sdata
);
2859 * We actually lost the connection ... or did we?
2862 wiphy_debug(local
->hw
.wiphy
,
2863 "%s: No probe response from AP %pM"
2864 " after %dms, disconnecting.\n",
2866 bssid
, probe_wait_ms
);
2868 ieee80211_sta_connection_lost(sdata
, bssid
,
2869 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2873 mutex_unlock(&ifmgd
->mtx
);
2875 mutex_lock(&local
->mtx
);
2876 ieee80211_recalc_idle(local
);
2877 mutex_unlock(&local
->mtx
);
2880 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2882 struct ieee80211_sub_if_data
*sdata
=
2883 (struct ieee80211_sub_if_data
*) data
;
2884 struct ieee80211_local
*local
= sdata
->local
;
2886 if (local
->quiescing
)
2889 ieee80211_queue_work(&sdata
->local
->hw
,
2890 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2893 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2895 struct ieee80211_sub_if_data
*sdata
=
2896 (struct ieee80211_sub_if_data
*) data
;
2897 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2898 struct ieee80211_local
*local
= sdata
->local
;
2900 if (local
->quiescing
)
2903 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2906 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2908 struct ieee80211_sub_if_data
*sdata
=
2909 container_of(work
, struct ieee80211_sub_if_data
,
2910 u
.mgd
.monitor_work
);
2912 ieee80211_mgd_probe_ap(sdata
, false);
2915 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2919 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2920 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2921 IEEE80211_STA_CONNECTION_POLL
);
2923 /* let's probe the connection once */
2924 flags
= sdata
->local
->hw
.flags
;
2925 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
2926 ieee80211_queue_work(&sdata
->local
->hw
,
2927 &sdata
->u
.mgd
.monitor_work
);
2928 /* and do all the other regular work too */
2929 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2934 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2936 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2939 * we need to use atomic bitops for the running bits
2940 * only because both timers might fire at the same
2941 * time -- the code here is properly synchronised.
2944 cancel_work_sync(&ifmgd
->request_smps_work
);
2946 cancel_work_sync(&ifmgd
->monitor_work
);
2947 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2948 if (del_timer_sync(&ifmgd
->timer
))
2949 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2951 cancel_work_sync(&ifmgd
->chswitch_work
);
2952 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2953 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2955 /* these will just be re-established on connection */
2956 del_timer_sync(&ifmgd
->conn_mon_timer
);
2957 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2960 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2962 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2964 if (!ifmgd
->associated
)
2967 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2968 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2969 mutex_lock(&ifmgd
->mtx
);
2970 if (ifmgd
->associated
) {
2971 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2972 wiphy_debug(sdata
->local
->hw
.wiphy
,
2973 "%s: driver requested disconnect after resume.\n",
2976 ieee80211_sta_connection_lost(sdata
,
2977 ifmgd
->associated
->bssid
,
2978 WLAN_REASON_UNSPECIFIED
);
2979 mutex_unlock(&ifmgd
->mtx
);
2982 mutex_unlock(&ifmgd
->mtx
);
2985 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2986 add_timer(&ifmgd
->timer
);
2987 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2988 add_timer(&ifmgd
->chswitch_timer
);
2989 ieee80211_sta_reset_beacon_monitor(sdata
);
2990 ieee80211_restart_sta_timer(sdata
);
2994 /* interface setup */
2995 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2997 struct ieee80211_if_managed
*ifmgd
;
2999 ifmgd
= &sdata
->u
.mgd
;
3000 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3001 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3002 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3003 ieee80211_beacon_connection_loss_work
);
3004 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3005 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3006 (unsigned long) sdata
);
3007 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3008 (unsigned long) sdata
);
3009 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3010 (unsigned long) sdata
);
3011 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3012 (unsigned long) sdata
);
3015 ifmgd
->powersave
= sdata
->wdev
.ps
;
3016 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3017 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3019 mutex_init(&ifmgd
->mtx
);
3021 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3022 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3024 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3027 /* scan finished notification */
3028 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3030 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
3032 /* Restart STA timers */
3034 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3035 ieee80211_restart_sta_timer(sdata
);
3039 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3040 unsigned long data
, void *dummy
)
3042 s32 latency_usec
= (s32
) data
;
3043 struct ieee80211_local
*local
=
3044 container_of(nb
, struct ieee80211_local
,
3045 network_latency_notifier
);
3047 mutex_lock(&local
->iflist_mtx
);
3048 ieee80211_recalc_ps(local
, latency_usec
);
3049 mutex_unlock(&local
->iflist_mtx
);
3054 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3055 struct cfg80211_bss
*cbss
, bool assoc
)
3057 struct ieee80211_local
*local
= sdata
->local
;
3058 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3059 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3060 struct sta_info
*sta
;
3061 bool have_sta
= false;
3064 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3069 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3074 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3079 mutex_lock(&local
->mtx
);
3080 ieee80211_recalc_idle(sdata
->local
);
3081 mutex_unlock(&local
->mtx
);
3083 /* switch to the right channel */
3084 local
->oper_channel
= cbss
->channel
;
3085 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
3088 struct ieee80211_supported_band
*sband
;
3089 u32 rates
= 0, basic_rates
= 0;
3090 bool have_higher_than_11mbit
;
3091 int min_rate
= INT_MAX
, min_rate_index
= -1;
3093 sband
= sdata
->local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3095 ieee80211_get_rates(sband
, bss
->supp_rates
,
3096 bss
->supp_rates_len
,
3097 &rates
, &basic_rates
,
3098 &have_higher_than_11mbit
,
3099 &min_rate
, &min_rate_index
);
3102 * This used to be a workaround for basic rates missing
3103 * in the association response frame. Now that we no
3104 * longer use the basic rates from there, it probably
3105 * doesn't happen any more, but keep the workaround so
3106 * in case some *other* APs are buggy in different ways
3107 * we can connect -- with a warning.
3109 if (!basic_rates
&& min_rate_index
>= 0) {
3111 "%s: No basic rates, using min rate instead.\n",
3113 basic_rates
= BIT(min_rate_index
);
3116 sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3117 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3119 /* cf. IEEE 802.11 9.2.12 */
3120 if (local
->oper_channel
->band
== IEEE80211_BAND_2GHZ
&&
3121 have_higher_than_11mbit
)
3122 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3124 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3126 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3128 /* tell driver about BSSID and basic rates */
3129 ieee80211_bss_info_change_notify(sdata
,
3130 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
);
3133 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
3135 err
= sta_info_insert(sta
);
3139 "%s: failed to insert STA entry for the AP (error %d)\n",
3144 WARN_ON_ONCE(compare_ether_addr(ifmgd
->bssid
, cbss
->bssid
));
3150 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3151 struct cfg80211_auth_request
*req
)
3153 struct ieee80211_local
*local
= sdata
->local
;
3154 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3155 struct ieee80211_mgd_auth_data
*auth_data
;
3159 /* prepare auth data structure */
3161 switch (req
->auth_type
) {
3162 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3163 auth_alg
= WLAN_AUTH_OPEN
;
3165 case NL80211_AUTHTYPE_SHARED_KEY
:
3166 if (IS_ERR(local
->wep_tx_tfm
))
3168 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3170 case NL80211_AUTHTYPE_FT
:
3171 auth_alg
= WLAN_AUTH_FT
;
3173 case NL80211_AUTHTYPE_NETWORK_EAP
:
3174 auth_alg
= WLAN_AUTH_LEAP
;
3180 auth_data
= kzalloc(sizeof(*auth_data
) + req
->ie_len
, GFP_KERNEL
);
3184 auth_data
->bss
= req
->bss
;
3186 if (req
->ie
&& req
->ie_len
) {
3187 memcpy(auth_data
->ie
, req
->ie
, req
->ie_len
);
3188 auth_data
->ie_len
= req
->ie_len
;
3191 if (req
->key
&& req
->key_len
) {
3192 auth_data
->key_len
= req
->key_len
;
3193 auth_data
->key_idx
= req
->key_idx
;
3194 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3197 auth_data
->algorithm
= auth_alg
;
3199 /* try to authenticate/probe */
3201 mutex_lock(&ifmgd
->mtx
);
3203 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3204 ifmgd
->assoc_data
) {
3209 if (ifmgd
->auth_data
)
3210 ieee80211_destroy_auth_data(sdata
, false);
3212 /* prep auth_data so we don't go into idle on disassoc */
3213 ifmgd
->auth_data
= auth_data
;
3215 if (ifmgd
->associated
)
3216 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3218 printk(KERN_DEBUG
"%s: authenticate with %pM\n",
3219 sdata
->name
, req
->bss
->bssid
);
3221 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3225 err
= ieee80211_probe_auth(sdata
);
3227 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3231 /* hold our own reference */
3232 cfg80211_ref_bss(auth_data
->bss
);
3237 ifmgd
->auth_data
= NULL
;
3241 mutex_unlock(&ifmgd
->mtx
);
3246 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3247 struct cfg80211_assoc_request
*req
)
3249 struct ieee80211_local
*local
= sdata
->local
;
3250 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3251 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3252 struct ieee80211_mgd_assoc_data
*assoc_data
;
3253 struct ieee80211_supported_band
*sband
;
3257 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
3261 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3265 mutex_lock(&ifmgd
->mtx
);
3267 if (ifmgd
->associated
)
3268 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3270 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
3275 if (ifmgd
->assoc_data
) {
3280 if (ifmgd
->auth_data
) {
3283 /* keep sta info, bssid if matching */
3284 match
= compare_ether_addr(ifmgd
->bssid
, req
->bss
->bssid
) == 0;
3285 ieee80211_destroy_auth_data(sdata
, match
);
3288 /* prepare assoc data */
3290 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
3291 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
3293 ifmgd
->beacon_crc_valid
= false;
3296 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3297 * We still associate in non-HT mode (11a/b/g) if any one of these
3298 * ciphers is configured as pairwise.
3299 * We can set this to true for non-11n hardware, that'll be checked
3300 * separately along with the peer capabilities.
3302 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
3303 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
3304 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
3305 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
3306 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3308 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
3309 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3311 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3312 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
3313 if (!sband
->ht_cap
.ht_supported
||
3314 local
->hw
.queues
< 4 || !bss
->wmm_used
)
3315 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
3317 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
3318 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
3319 sizeof(ifmgd
->ht_capa_mask
));
3321 if (req
->ie
&& req
->ie_len
) {
3322 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
3323 assoc_data
->ie_len
= req
->ie_len
;
3326 assoc_data
->bss
= req
->bss
;
3328 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
3329 if (ifmgd
->powersave
)
3330 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
3332 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
3334 ifmgd
->ap_smps
= ifmgd
->req_smps
;
3336 assoc_data
->capability
= req
->bss
->capability
;
3337 assoc_data
->wmm
= bss
->wmm_used
&& (local
->hw
.queues
>= 4);
3338 assoc_data
->supp_rates
= bss
->supp_rates
;
3339 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
3340 assoc_data
->ht_information_ie
=
3341 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
3343 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
3344 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
3345 assoc_data
->uapsd
= true;
3346 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
3348 assoc_data
->uapsd
= false;
3349 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
3352 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
3353 assoc_data
->ssid_len
= ssidie
[1];
3355 if (req
->prev_bssid
)
3356 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
3359 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
3360 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
3362 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
3363 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
3366 if (req
->crypto
.control_port
)
3367 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
3369 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
3371 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
3372 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
3374 /* kick off associate process */
3376 ifmgd
->assoc_data
= assoc_data
;
3378 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
3382 if (!bss
->dtim_period
&&
3383 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
) {
3385 * Wait up to one beacon interval ...
3386 * should this be more if we miss one?
3388 printk(KERN_DEBUG
"%s: waiting for beacon from %pM\n",
3389 sdata
->name
, ifmgd
->bssid
);
3390 assoc_data
->timeout
= jiffies
+
3391 TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
3393 assoc_data
->have_beacon
= true;
3394 assoc_data
->sent_assoc
= false;
3395 assoc_data
->timeout
= jiffies
;
3397 run_again(ifmgd
, assoc_data
->timeout
);
3399 if (bss
->corrupt_data
) {
3400 char *corrupt_type
= "data";
3401 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
3402 if (bss
->corrupt_data
&
3403 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3404 corrupt_type
= "beacon and probe response";
3406 corrupt_type
= "beacon";
3407 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
3408 corrupt_type
= "probe response";
3409 printk(KERN_DEBUG
"%s: associating with AP with corrupt %s\n",
3410 sdata
->name
, corrupt_type
);
3416 ifmgd
->assoc_data
= NULL
;
3420 mutex_unlock(&ifmgd
->mtx
);
3425 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
3426 struct cfg80211_deauth_request
*req
)
3428 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3429 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3431 mutex_lock(&ifmgd
->mtx
);
3433 if (ifmgd
->auth_data
) {
3434 ieee80211_destroy_auth_data(sdata
, false);
3435 mutex_unlock(&ifmgd
->mtx
);
3440 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
3441 sdata
->name
, req
->bssid
, req
->reason_code
);
3443 if (ifmgd
->associated
&&
3444 compare_ether_addr(ifmgd
->associated
->bssid
, req
->bssid
) == 0)
3445 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3446 req
->reason_code
, true, frame_buf
);
3448 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
3449 IEEE80211_STYPE_DEAUTH
,
3450 req
->reason_code
, true,
3452 mutex_unlock(&ifmgd
->mtx
);
3454 __cfg80211_send_deauth(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3456 mutex_lock(&sdata
->local
->mtx
);
3457 ieee80211_recalc_idle(sdata
->local
);
3458 mutex_unlock(&sdata
->local
->mtx
);
3463 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
3464 struct cfg80211_disassoc_request
*req
)
3466 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3468 u8 frame_buf
[DEAUTH_DISASSOC_LEN
];
3470 mutex_lock(&ifmgd
->mtx
);
3473 * cfg80211 should catch this ... but it's racy since
3474 * we can receive a disassoc frame, process it, hand it
3475 * to cfg80211 while that's in a locked section already
3476 * trying to tell us that the user wants to disconnect.
3478 if (ifmgd
->associated
!= req
->bss
) {
3479 mutex_unlock(&ifmgd
->mtx
);
3483 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
3484 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
3486 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
3487 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
3488 req
->reason_code
, !req
->local_state_change
,
3490 mutex_unlock(&ifmgd
->mtx
);
3492 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
, DEAUTH_DISASSOC_LEN
);
3494 mutex_lock(&sdata
->local
->mtx
);
3495 ieee80211_recalc_idle(sdata
->local
);
3496 mutex_unlock(&sdata
->local
->mtx
);
3501 void ieee80211_mgd_teardown(struct ieee80211_sub_if_data
*sdata
)
3503 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3505 mutex_lock(&ifmgd
->mtx
);
3506 if (ifmgd
->assoc_data
)
3507 ieee80211_destroy_assoc_data(sdata
, false);
3508 if (ifmgd
->auth_data
)
3509 ieee80211_destroy_auth_data(sdata
, false);
3510 del_timer_sync(&ifmgd
->timer
);
3511 mutex_unlock(&ifmgd
->mtx
);
3514 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
3515 enum nl80211_cqm_rssi_threshold_event rssi_event
,
3518 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3520 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
3522 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
3524 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
3526 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
3528 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
3529 return sdata
->dev
->operstate
;
3531 EXPORT_SYMBOL(ieee80211_get_operstate
);