2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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.
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
37 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
38 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
39 #define IEEE80211_AUTH_MAX_TRIES 3
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
43 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
44 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
45 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
46 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
47 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
48 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
50 #define IEEE80211_PROBE_DELAY (HZ / 33)
51 #define IEEE80211_CHANNEL_TIME (HZ / 33)
52 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
53 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
54 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
55 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
56 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
58 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
61 #define ERP_INFO_USE_PROTECTION BIT(1)
63 /* mgmt header + 1 byte category code */
64 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
67 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
68 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
69 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
70 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
72 /* next values represent the buffer size for A-MPDU frame.
73 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
74 #define IEEE80211_MIN_AMPDU_BUF 0x8
75 #define IEEE80211_MAX_AMPDU_BUF 0x40
77 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
78 u8
*ssid
, size_t ssid_len
);
79 static struct ieee80211_sta_bss
*
80 ieee80211_rx_bss_get(struct ieee80211_local
*local
, u8
*bssid
, int freq
,
81 u8
*ssid
, u8 ssid_len
);
82 static void ieee80211_rx_bss_put(struct ieee80211_local
*local
,
83 struct ieee80211_sta_bss
*bss
);
84 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data
*sdata
,
85 struct ieee80211_if_sta
*ifsta
);
86 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
);
87 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data
*sdata
,
88 u8
*ssid
, size_t ssid_len
);
89 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
,
90 struct ieee80211_if_sta
*ifsta
);
91 static void sta_rx_agg_session_timer_expired(unsigned long data
);
94 static u8
* ieee80211_bss_get_ie(struct ieee80211_sta_bss
*bss
, u8 ie
)
101 end
= pos
+ bss
->ies_len
;
103 while (pos
+ 1 < end
) {
104 if (pos
+ 2 + pos
[1] > end
)
115 static int ecw2cw(int ecw
)
117 return (1 << ecw
) - 1;
121 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
122 struct ieee80211_sta_bss
*bss
,
125 struct ieee80211_local
*local
= sdata
->local
;
126 int i
, have_higher_than_11mbit
= 0;
129 /* cf. IEEE 802.11 9.2.12 */
130 for (i
= 0; i
< bss
->supp_rates_len
; i
++)
131 if ((bss
->supp_rates
[i
] & 0x7f) * 5 > 110)
132 have_higher_than_11mbit
= 1;
134 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
135 have_higher_than_11mbit
)
136 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
138 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
141 if (local
->ops
->conf_tx
) {
142 struct ieee80211_tx_queue_params qparam
;
144 memset(&qparam
, 0, sizeof(qparam
));
148 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
149 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
))
154 qparam
.cw_max
= 1023;
157 for (i
= 0; i
< local_to_hw(local
)->queues
; i
++)
158 local
->ops
->conf_tx(local_to_hw(local
), i
, &qparam
);
162 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
163 struct ieee80211_if_sta
*ifsta
,
164 u8
*wmm_param
, size_t wmm_param_len
)
166 struct ieee80211_tx_queue_params params
;
171 if (!(ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
177 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
179 count
= wmm_param
[6] & 0x0f;
180 if (count
== ifsta
->wmm_last_param_set
)
182 ifsta
->wmm_last_param_set
= count
;
185 left
= wmm_param_len
- 8;
187 memset(¶ms
, 0, sizeof(params
));
189 if (!local
->ops
->conf_tx
)
193 for (; left
>= 4; left
-= 4, pos
+= 4) {
194 int aci
= (pos
[0] >> 5) & 0x03;
195 int acm
= (pos
[0] >> 4) & 0x01;
202 local
->wmm_acm
|= BIT(0) | BIT(3);
207 local
->wmm_acm
|= BIT(4) | BIT(5);
212 local
->wmm_acm
|= BIT(6) | BIT(7);
218 local
->wmm_acm
|= BIT(1) | BIT(2);
222 params
.aifs
= pos
[0] & 0x0f;
223 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
224 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
225 params
.txop
= get_unaligned_le16(pos
+ 2);
226 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
227 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
228 "cWmin=%d cWmax=%d txop=%d\n",
229 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
230 params
.cw_max
, params
.txop
);
232 /* TODO: handle ACM (block TX, fallback to next lowest allowed
234 if (local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
235 printk(KERN_DEBUG
"%s: failed to set TX queue "
236 "parameters for queue %d\n", local
->mdev
->name
, queue
);
241 static u32
ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data
*sdata
,
243 bool use_short_preamble
)
245 struct ieee80211_bss_conf
*bss_conf
= &sdata
->bss_conf
;
246 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
247 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
248 DECLARE_MAC_BUF(mac
);
252 if (use_protection
!= bss_conf
->use_cts_prot
) {
253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
254 if (net_ratelimit()) {
255 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID="
258 use_protection
? "enabled" : "disabled",
259 print_mac(mac
, ifsta
->bssid
));
262 bss_conf
->use_cts_prot
= use_protection
;
263 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
266 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
267 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
268 if (net_ratelimit()) {
269 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
272 use_short_preamble
? "short" : "long",
273 print_mac(mac
, ifsta
->bssid
));
276 bss_conf
->use_short_preamble
= use_short_preamble
;
277 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
283 static u32
ieee80211_handle_erp_ie(struct ieee80211_sub_if_data
*sdata
,
286 bool use_protection
= (erp_value
& WLAN_ERP_USE_PROTECTION
) != 0;
287 bool use_short_preamble
= (erp_value
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
289 return ieee80211_handle_protect_preamb(sdata
,
290 use_protection
, use_short_preamble
);
293 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
294 struct ieee80211_sta_bss
*bss
)
298 if (bss
->has_erp_value
)
299 changed
|= ieee80211_handle_erp_ie(sdata
, bss
->erp_value
);
301 u16 capab
= bss
->capability
;
302 changed
|= ieee80211_handle_protect_preamb(sdata
, false,
303 (capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
) != 0);
309 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap
*ht_cap_ie
,
310 struct ieee80211_ht_info
*ht_info
)
316 memset(ht_info
, 0, sizeof(*ht_info
));
319 u8 ampdu_info
= ht_cap_ie
->ampdu_params_info
;
321 ht_info
->ht_supported
= 1;
322 ht_info
->cap
= le16_to_cpu(ht_cap_ie
->cap_info
);
323 ht_info
->ampdu_factor
=
324 ampdu_info
& IEEE80211_HT_CAP_AMPDU_FACTOR
;
325 ht_info
->ampdu_density
=
326 (ampdu_info
& IEEE80211_HT_CAP_AMPDU_DENSITY
) >> 2;
327 memcpy(ht_info
->supp_mcs_set
, ht_cap_ie
->supp_mcs_set
, 16);
329 ht_info
->ht_supported
= 0;
334 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
335 struct ieee80211_ht_addt_info
*ht_add_info_ie
,
336 struct ieee80211_ht_bss_info
*bss_info
)
338 if (bss_info
== NULL
)
341 memset(bss_info
, 0, sizeof(*bss_info
));
343 if (ht_add_info_ie
) {
345 op_mode
= le16_to_cpu(ht_add_info_ie
->operation_mode
);
347 bss_info
->primary_channel
= ht_add_info_ie
->control_chan
;
348 bss_info
->bss_cap
= ht_add_info_ie
->ht_param
;
349 bss_info
->bss_op_mode
= (u8
)(op_mode
& 0xff);
355 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
,
356 struct ieee80211_if_sta
*ifsta
)
358 union iwreq_data wrqu
;
360 if (ifsta
->assocreq_ies
) {
361 memset(&wrqu
, 0, sizeof(wrqu
));
362 wrqu
.data
.length
= ifsta
->assocreq_ies_len
;
363 wireless_send_event(sdata
->dev
, IWEVASSOCREQIE
, &wrqu
,
364 ifsta
->assocreq_ies
);
366 if (ifsta
->assocresp_ies
) {
367 memset(&wrqu
, 0, sizeof(wrqu
));
368 wrqu
.data
.length
= ifsta
->assocresp_ies_len
;
369 wireless_send_event(sdata
->dev
, IWEVASSOCRESPIE
, &wrqu
,
370 ifsta
->assocresp_ies
);
375 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
376 struct ieee80211_if_sta
*ifsta
,
379 struct ieee80211_local
*local
= sdata
->local
;
380 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
381 union iwreq_data wrqu
;
382 u32 changed
= BSS_CHANGED_ASSOC
;
385 struct ieee80211_sta_bss
*bss
;
387 ifsta
->flags
|= IEEE80211_STA_ASSOCIATED
;
389 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
392 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
393 conf
->channel
->center_freq
,
394 ifsta
->ssid
, ifsta
->ssid_len
);
396 /* set timing information */
397 sdata
->bss_conf
.beacon_int
= bss
->beacon_int
;
398 sdata
->bss_conf
.timestamp
= bss
->timestamp
;
399 sdata
->bss_conf
.dtim_period
= bss
->dtim_period
;
401 changed
|= ieee80211_handle_bss_capability(sdata
, bss
);
403 ieee80211_rx_bss_put(local
, bss
);
406 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
) {
407 changed
|= BSS_CHANGED_HT
;
408 sdata
->bss_conf
.assoc_ht
= 1;
409 sdata
->bss_conf
.ht_conf
= &conf
->ht_conf
;
410 sdata
->bss_conf
.ht_bss_conf
= &conf
->ht_bss_conf
;
413 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
414 memcpy(ifsta
->prev_bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
415 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
416 ieee80211_sta_send_associnfo(sdata
, ifsta
);
418 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
419 changed
|= ieee80211_reset_erp_info(sdata
);
421 sdata
->bss_conf
.assoc_ht
= 0;
422 sdata
->bss_conf
.ht_conf
= NULL
;
423 sdata
->bss_conf
.ht_bss_conf
= NULL
;
425 memset(wrqu
.ap_addr
.sa_data
, 0, ETH_ALEN
);
427 ifsta
->last_probe
= jiffies
;
428 ieee80211_led_assoc(local
, assoc
);
430 sdata
->bss_conf
.assoc
= assoc
;
431 ieee80211_bss_info_change_notify(sdata
, changed
);
434 netif_carrier_on(sdata
->dev
);
436 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
437 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
440 void ieee80211_sta_tx(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
443 skb
->dev
= sdata
->local
->mdev
;
444 skb_set_mac_header(skb
, 0);
445 skb_set_network_header(skb
, 0);
446 skb_set_transport_header(skb
, 0);
448 skb
->iif
= sdata
->dev
->ifindex
;
449 skb
->do_not_encrypt
= !encrypt
;
455 static void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
456 struct ieee80211_if_sta
*ifsta
,
457 int transaction
, u8
*extra
, size_t extra_len
,
460 struct ieee80211_local
*local
= sdata
->local
;
462 struct ieee80211_mgmt
*mgmt
;
464 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
465 sizeof(*mgmt
) + 6 + extra_len
);
467 printk(KERN_DEBUG
"%s: failed to allocate buffer for auth "
468 "frame\n", sdata
->dev
->name
);
471 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
473 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
474 memset(mgmt
, 0, 24 + 6);
475 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
476 IEEE80211_STYPE_AUTH
);
478 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
479 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
480 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
481 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
482 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(ifsta
->auth_alg
);
483 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
484 ifsta
->auth_transaction
= transaction
+ 1;
485 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
487 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
489 ieee80211_sta_tx(sdata
, skb
, encrypt
);
492 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
493 struct ieee80211_if_sta
*ifsta
)
495 DECLARE_MAC_BUF(mac
);
497 ifsta
->direct_probe_tries
++;
498 if (ifsta
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
499 printk(KERN_DEBUG
"%s: direct probe to AP %s timed out\n",
500 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
501 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
505 printk(KERN_DEBUG
"%s: direct probe to AP %s try %d\n",
506 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
),
507 ifsta
->direct_probe_tries
);
509 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
511 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifsta
->request
);
513 /* Direct probe is sent to broadcast address as some APs
514 * will not answer to direct packet in unassociated state.
516 ieee80211_send_probe_req(sdata
, NULL
,
517 ifsta
->ssid
, ifsta
->ssid_len
);
519 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
523 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
524 struct ieee80211_if_sta
*ifsta
)
526 DECLARE_MAC_BUF(mac
);
529 if (ifsta
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
530 printk(KERN_DEBUG
"%s: authentication with AP %s"
532 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
533 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
537 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
538 printk(KERN_DEBUG
"%s: authenticate with AP %s\n",
539 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
541 ieee80211_send_auth(sdata
, ifsta
, 1, NULL
, 0, 0);
543 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
546 static int ieee80211_compatible_rates(struct ieee80211_sta_bss
*bss
,
547 struct ieee80211_supported_band
*sband
,
553 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
554 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
556 for (j
= 0; j
< sband
->n_bitrates
; j
++)
557 if (sband
->bitrates
[j
].bitrate
== rate
) {
567 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
,
568 struct ieee80211_if_sta
*ifsta
)
570 struct ieee80211_local
*local
= sdata
->local
;
572 struct ieee80211_mgmt
*mgmt
;
573 u8
*pos
, *ies
, *ht_add_ie
;
574 int i
, len
, count
, rates_len
, supp_rates_len
;
576 struct ieee80211_sta_bss
*bss
;
578 struct ieee80211_supported_band
*sband
;
581 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
582 sizeof(*mgmt
) + 200 + ifsta
->extra_ie_len
+
585 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
586 "frame\n", sdata
->dev
->name
);
589 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
591 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
593 capab
= ifsta
->capab
;
595 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
596 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
597 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
598 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
599 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
602 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
603 local
->hw
.conf
.channel
->center_freq
,
604 ifsta
->ssid
, ifsta
->ssid_len
);
606 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
607 capab
|= WLAN_CAPABILITY_PRIVACY
;
611 /* get all rates supported by the device and the AP as
612 * some APs don't like getting a superset of their rates
613 * in the association request (e.g. D-Link DAP 1353 in
615 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
617 if ((bss
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
618 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
619 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
621 ieee80211_rx_bss_put(local
, bss
);
624 rates_len
= sband
->n_bitrates
;
627 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
629 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
630 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
631 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
633 if (ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
635 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
636 IEEE80211_STYPE_REASSOC_REQ
);
637 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
638 mgmt
->u
.reassoc_req
.listen_interval
=
639 cpu_to_le16(local
->hw
.conf
.listen_interval
);
640 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifsta
->prev_bssid
,
644 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
645 IEEE80211_STYPE_ASSOC_REQ
);
646 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
647 mgmt
->u
.reassoc_req
.listen_interval
=
648 cpu_to_le16(local
->hw
.conf
.listen_interval
);
652 ies
= pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
653 *pos
++ = WLAN_EID_SSID
;
654 *pos
++ = ifsta
->ssid_len
;
655 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
657 /* add all rates which were marked to be used above */
658 supp_rates_len
= rates_len
;
659 if (supp_rates_len
> 8)
662 len
= sband
->n_bitrates
;
663 pos
= skb_put(skb
, supp_rates_len
+ 2);
664 *pos
++ = WLAN_EID_SUPP_RATES
;
665 *pos
++ = supp_rates_len
;
668 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
669 if (BIT(i
) & rates
) {
670 int rate
= sband
->bitrates
[i
].bitrate
;
671 *pos
++ = (u8
) (rate
/ 5);
677 if (rates_len
> count
) {
678 pos
= skb_put(skb
, rates_len
- count
+ 2);
679 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
680 *pos
++ = rates_len
- count
;
682 for (i
++; i
< sband
->n_bitrates
; i
++) {
683 if (BIT(i
) & rates
) {
684 int rate
= sband
->bitrates
[i
].bitrate
;
685 *pos
++ = (u8
) (rate
/ 5);
690 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
691 /* 1. power capabilities */
692 pos
= skb_put(skb
, 4);
693 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
695 *pos
++ = 0; /* min tx power */
696 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
698 /* 2. supported channels */
699 /* TODO: get this in reg domain format */
700 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
701 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
702 *pos
++ = 2 * sband
->n_channels
;
703 for (i
= 0; i
< sband
->n_channels
; i
++) {
704 *pos
++ = ieee80211_frequency_to_channel(
705 sband
->channels
[i
].center_freq
);
706 *pos
++ = 1; /* one channel in the subband*/
710 if (ifsta
->extra_ie
) {
711 pos
= skb_put(skb
, ifsta
->extra_ie_len
);
712 memcpy(pos
, ifsta
->extra_ie
, ifsta
->extra_ie_len
);
715 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
716 pos
= skb_put(skb
, 9);
717 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
718 *pos
++ = 7; /* len */
719 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
722 *pos
++ = 2; /* WME */
723 *pos
++ = 0; /* WME info */
724 *pos
++ = 1; /* WME ver */
728 /* wmm support is a must to HT */
729 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
730 sband
->ht_info
.ht_supported
&&
731 (ht_add_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_EXTRA_INFO
))) {
732 struct ieee80211_ht_addt_info
*ht_add_info
=
733 (struct ieee80211_ht_addt_info
*)ht_add_ie
;
734 u16 cap
= sband
->ht_info
.cap
;
736 u32 flags
= local
->hw
.conf
.channel
->flags
;
738 switch (ht_add_info
->ht_param
& IEEE80211_HT_IE_CHA_SEC_OFFSET
) {
739 case IEEE80211_HT_IE_CHA_SEC_ABOVE
:
740 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
741 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH
;
742 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
745 case IEEE80211_HT_IE_CHA_SEC_BELOW
:
746 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
747 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH
;
748 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
753 tmp
= cpu_to_le16(cap
);
754 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
755 *pos
++ = WLAN_EID_HT_CAPABILITY
;
756 *pos
++ = sizeof(struct ieee80211_ht_cap
);
757 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
758 memcpy(pos
, &tmp
, sizeof(u16
));
760 /* TODO: needs a define here for << 2 */
761 *pos
++ = sband
->ht_info
.ampdu_factor
|
762 (sband
->ht_info
.ampdu_density
<< 2);
763 memcpy(pos
, sband
->ht_info
.supp_mcs_set
, 16);
766 kfree(ifsta
->assocreq_ies
);
767 ifsta
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
768 ifsta
->assocreq_ies
= kmalloc(ifsta
->assocreq_ies_len
, GFP_KERNEL
);
769 if (ifsta
->assocreq_ies
)
770 memcpy(ifsta
->assocreq_ies
, ies
, ifsta
->assocreq_ies_len
);
772 ieee80211_sta_tx(sdata
, skb
, 0);
776 static void ieee80211_send_deauth(struct ieee80211_sub_if_data
*sdata
,
777 struct ieee80211_if_sta
*ifsta
, u16 reason
)
779 struct ieee80211_local
*local
= sdata
->local
;
781 struct ieee80211_mgmt
*mgmt
;
783 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
785 printk(KERN_DEBUG
"%s: failed to allocate buffer for deauth "
786 "frame\n", sdata
->dev
->name
);
789 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
791 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
793 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
794 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
795 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
796 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
797 IEEE80211_STYPE_DEAUTH
);
799 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
801 ieee80211_sta_tx(sdata
, skb
, 0);
805 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data
*sdata
,
806 struct ieee80211_if_sta
*ifsta
, u16 reason
)
808 struct ieee80211_local
*local
= sdata
->local
;
810 struct ieee80211_mgmt
*mgmt
;
812 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
814 printk(KERN_DEBUG
"%s: failed to allocate buffer for disassoc "
815 "frame\n", sdata
->dev
->name
);
818 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
820 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
822 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
823 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
824 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
825 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
826 IEEE80211_STYPE_DISASSOC
);
828 mgmt
->u
.disassoc
.reason_code
= cpu_to_le16(reason
);
830 ieee80211_sta_tx(sdata
, skb
, 0);
833 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
834 struct ieee80211_if_sta
*ifsta
, bool deauth
,
835 bool self_disconnected
, u16 reason
)
837 struct ieee80211_local
*local
= sdata
->local
;
838 struct sta_info
*sta
;
842 sta
= sta_info_get(local
, ifsta
->bssid
);
849 ifsta
->direct_probe_tries
= 0;
850 ifsta
->auth_tries
= 0;
852 ifsta
->assoc_scan_tries
= 0;
853 ifsta
->assoc_tries
= 0;
855 netif_carrier_off(sdata
->dev
);
857 ieee80211_sta_tear_down_BA_sessions(sdata
, sta
->addr
);
859 if (self_disconnected
) {
861 ieee80211_send_deauth(sdata
, ifsta
, reason
);
863 ieee80211_send_disassoc(sdata
, ifsta
, reason
);
866 ieee80211_set_associated(sdata
, ifsta
, 0);
868 if (self_disconnected
)
869 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
871 sta_info_unlink(&sta
);
875 sta_info_destroy(sta
);
878 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
,
879 struct ieee80211_if_sta
*ifsta
)
881 struct ieee80211_local
*local
= sdata
->local
;
882 struct ieee80211_sta_bss
*bss
;
887 if (!ifsta
|| (ifsta
->flags
& IEEE80211_STA_MIXED_CELL
))
890 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
891 local
->hw
.conf
.channel
->center_freq
,
892 ifsta
->ssid
, ifsta
->ssid_len
);
896 bss_privacy
= !!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
);
897 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
898 privacy_invoked
= !!(ifsta
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
900 ieee80211_rx_bss_put(local
, bss
);
902 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
909 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
910 struct ieee80211_if_sta
*ifsta
)
912 DECLARE_MAC_BUF(mac
);
914 ifsta
->assoc_tries
++;
915 if (ifsta
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
916 printk(KERN_DEBUG
"%s: association with AP %s"
918 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
919 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
923 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
924 printk(KERN_DEBUG
"%s: associate with AP %s\n",
925 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
926 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
927 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
928 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
929 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
933 ieee80211_send_assoc(sdata
, ifsta
);
935 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
939 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
,
940 struct ieee80211_if_sta
*ifsta
)
942 struct ieee80211_local
*local
= sdata
->local
;
943 struct sta_info
*sta
;
945 DECLARE_MAC_BUF(mac
);
947 /* TODO: start monitoring current AP signal quality and number of
948 * missed beacons. Scan other channels every now and then and search
950 /* TODO: remove expired BSSes */
952 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
956 sta
= sta_info_get(local
, ifsta
->bssid
);
958 printk(KERN_DEBUG
"%s: No STA entry for own AP %s\n",
959 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
963 if (time_after(jiffies
,
964 sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
965 if (ifsta
->flags
& IEEE80211_STA_PROBEREQ_POLL
) {
966 printk(KERN_DEBUG
"%s: No ProbeResp from "
967 "current AP %s - assume out of "
969 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
972 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
974 local
->scan_ssid_len
);
975 ifsta
->flags
^= IEEE80211_STA_PROBEREQ_POLL
;
977 ifsta
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
978 if (time_after(jiffies
, ifsta
->last_probe
+
979 IEEE80211_PROBE_INTERVAL
)) {
980 ifsta
->last_probe
= jiffies
;
981 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
991 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
992 WLAN_REASON_PREV_AUTH_NOT_VALID
);
994 mod_timer(&ifsta
->timer
, jiffies
+
995 IEEE80211_MONITORING_INTERVAL
);
999 static void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1000 u8
*ssid
, size_t ssid_len
)
1002 struct ieee80211_local
*local
= sdata
->local
;
1003 struct ieee80211_supported_band
*sband
;
1004 struct sk_buff
*skb
;
1005 struct ieee80211_mgmt
*mgmt
;
1006 u8
*pos
, *supp_rates
, *esupp_rates
= NULL
;
1009 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
) + 200);
1011 printk(KERN_DEBUG
"%s: failed to allocate buffer for probe "
1012 "request\n", sdata
->dev
->name
);
1015 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1017 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
1018 memset(mgmt
, 0, 24);
1019 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1020 IEEE80211_STYPE_PROBE_REQ
);
1021 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1023 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1024 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1026 memset(mgmt
->da
, 0xff, ETH_ALEN
);
1027 memset(mgmt
->bssid
, 0xff, ETH_ALEN
);
1029 pos
= skb_put(skb
, 2 + ssid_len
);
1030 *pos
++ = WLAN_EID_SSID
;
1032 memcpy(pos
, ssid
, ssid_len
);
1034 supp_rates
= skb_put(skb
, 2);
1035 supp_rates
[0] = WLAN_EID_SUPP_RATES
;
1037 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1039 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1040 struct ieee80211_rate
*rate
= &sband
->bitrates
[i
];
1042 pos
= skb_put(skb
, 1);
1044 } else if (supp_rates
[1] == 8) {
1045 esupp_rates
= skb_put(skb
, 3);
1046 esupp_rates
[0] = WLAN_EID_EXT_SUPP_RATES
;
1048 pos
= &esupp_rates
[2];
1050 pos
= skb_put(skb
, 1);
1053 *pos
= rate
->bitrate
/ 5;
1056 ieee80211_sta_tx(sdata
, skb
, 0);
1060 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1062 if (!sdata
|| !sdata
->default_key
||
1063 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1069 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
1070 struct ieee80211_if_sta
*ifsta
)
1072 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1073 ifsta
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1074 ieee80211_associate(sdata
, ifsta
);
1078 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1079 struct ieee80211_if_sta
*ifsta
,
1080 struct ieee80211_mgmt
*mgmt
,
1084 struct ieee802_11_elems elems
;
1086 pos
= mgmt
->u
.auth
.variable
;
1087 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1088 if (!elems
.challenge
)
1090 ieee80211_send_auth(sdata
, ifsta
, 3, elems
.challenge
- 2,
1091 elems
.challenge_len
+ 2, 1);
1094 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data
*sdata
, u8
*da
, u16 tid
,
1095 u8 dialog_token
, u16 status
, u16 policy
,
1096 u16 buf_size
, u16 timeout
)
1098 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1099 struct ieee80211_local
*local
= sdata
->local
;
1100 struct sk_buff
*skb
;
1101 struct ieee80211_mgmt
*mgmt
;
1104 skb
= dev_alloc_skb(sizeof(*mgmt
) + local
->hw
.extra_tx_headroom
);
1107 printk(KERN_DEBUG
"%s: failed to allocate buffer "
1108 "for addba resp frame\n", sdata
->dev
->name
);
1112 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1113 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
1114 memset(mgmt
, 0, 24);
1115 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1116 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1117 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
1118 memcpy(mgmt
->bssid
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1120 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
1121 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1122 IEEE80211_STYPE_ACTION
);
1124 skb_put(skb
, 1 + sizeof(mgmt
->u
.action
.u
.addba_resp
));
1125 mgmt
->u
.action
.category
= WLAN_CATEGORY_BACK
;
1126 mgmt
->u
.action
.u
.addba_resp
.action_code
= WLAN_ACTION_ADDBA_RESP
;
1127 mgmt
->u
.action
.u
.addba_resp
.dialog_token
= dialog_token
;
1129 capab
= (u16
)(policy
<< 1); /* bit 1 aggregation policy */
1130 capab
|= (u16
)(tid
<< 2); /* bit 5:2 TID number */
1131 capab
|= (u16
)(buf_size
<< 6); /* bit 15:6 max size of aggregation */
1133 mgmt
->u
.action
.u
.addba_resp
.capab
= cpu_to_le16(capab
);
1134 mgmt
->u
.action
.u
.addba_resp
.timeout
= cpu_to_le16(timeout
);
1135 mgmt
->u
.action
.u
.addba_resp
.status
= cpu_to_le16(status
);
1137 ieee80211_sta_tx(sdata
, skb
, 0);
1142 void ieee80211_send_addba_request(struct ieee80211_sub_if_data
*sdata
, const u8
*da
,
1143 u16 tid
, u8 dialog_token
, u16 start_seq_num
,
1144 u16 agg_size
, u16 timeout
)
1146 struct ieee80211_local
*local
= sdata
->local
;
1147 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1148 struct sk_buff
*skb
;
1149 struct ieee80211_mgmt
*mgmt
;
1152 skb
= dev_alloc_skb(sizeof(*mgmt
) + local
->hw
.extra_tx_headroom
);
1155 printk(KERN_ERR
"%s: failed to allocate buffer "
1156 "for addba request frame\n", sdata
->dev
->name
);
1159 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1160 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
1161 memset(mgmt
, 0, 24);
1162 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1163 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1164 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
1165 memcpy(mgmt
->bssid
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1167 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
1169 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1170 IEEE80211_STYPE_ACTION
);
1172 skb_put(skb
, 1 + sizeof(mgmt
->u
.action
.u
.addba_req
));
1174 mgmt
->u
.action
.category
= WLAN_CATEGORY_BACK
;
1175 mgmt
->u
.action
.u
.addba_req
.action_code
= WLAN_ACTION_ADDBA_REQ
;
1177 mgmt
->u
.action
.u
.addba_req
.dialog_token
= dialog_token
;
1178 capab
= (u16
)(1 << 1); /* bit 1 aggregation policy */
1179 capab
|= (u16
)(tid
<< 2); /* bit 5:2 TID number */
1180 capab
|= (u16
)(agg_size
<< 6); /* bit 15:6 max size of aggergation */
1182 mgmt
->u
.action
.u
.addba_req
.capab
= cpu_to_le16(capab
);
1184 mgmt
->u
.action
.u
.addba_req
.timeout
= cpu_to_le16(timeout
);
1185 mgmt
->u
.action
.u
.addba_req
.start_seq_num
=
1186 cpu_to_le16(start_seq_num
<< 4);
1188 ieee80211_sta_tx(sdata
, skb
, 0);
1191 static void ieee80211_sta_process_addba_request(struct ieee80211_local
*local
,
1192 struct ieee80211_mgmt
*mgmt
,
1195 struct ieee80211_hw
*hw
= &local
->hw
;
1196 struct ieee80211_conf
*conf
= &hw
->conf
;
1197 struct sta_info
*sta
;
1198 struct tid_ampdu_rx
*tid_agg_rx
;
1199 u16 capab
, tid
, timeout
, ba_policy
, buf_size
, start_seq_num
, status
;
1201 int ret
= -EOPNOTSUPP
;
1202 DECLARE_MAC_BUF(mac
);
1206 sta
= sta_info_get(local
, mgmt
->sa
);
1212 /* extract session parameters from addba request frame */
1213 dialog_token
= mgmt
->u
.action
.u
.addba_req
.dialog_token
;
1214 timeout
= le16_to_cpu(mgmt
->u
.action
.u
.addba_req
.timeout
);
1216 le16_to_cpu(mgmt
->u
.action
.u
.addba_req
.start_seq_num
) >> 4;
1218 capab
= le16_to_cpu(mgmt
->u
.action
.u
.addba_req
.capab
);
1219 ba_policy
= (capab
& IEEE80211_ADDBA_PARAM_POLICY_MASK
) >> 1;
1220 tid
= (capab
& IEEE80211_ADDBA_PARAM_TID_MASK
) >> 2;
1221 buf_size
= (capab
& IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK
) >> 6;
1223 status
= WLAN_STATUS_REQUEST_DECLINED
;
1225 /* sanity check for incoming parameters:
1226 * check if configuration can support the BA policy
1227 * and if buffer size does not exceeds max value */
1228 if (((ba_policy
!= 1)
1229 && (!(conf
->ht_conf
.cap
& IEEE80211_HT_CAP_DELAY_BA
)))
1230 || (buf_size
> IEEE80211_MAX_AMPDU_BUF
)) {
1231 status
= WLAN_STATUS_INVALID_QOS_PARAM
;
1232 #ifdef CONFIG_MAC80211_HT_DEBUG
1233 if (net_ratelimit())
1234 printk(KERN_DEBUG
"AddBA Req with bad params from "
1235 "%s on tid %u. policy %d, buffer size %d\n",
1236 print_mac(mac
, mgmt
->sa
), tid
, ba_policy
,
1238 #endif /* CONFIG_MAC80211_HT_DEBUG */
1241 /* determine default buffer size */
1242 if (buf_size
== 0) {
1243 struct ieee80211_supported_band
*sband
;
1245 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1246 buf_size
= IEEE80211_MIN_AMPDU_BUF
;
1247 buf_size
= buf_size
<< sband
->ht_info
.ampdu_factor
;
1251 /* examine state machine */
1252 spin_lock_bh(&sta
->lock
);
1254 if (sta
->ampdu_mlme
.tid_state_rx
[tid
] != HT_AGG_STATE_IDLE
) {
1255 #ifdef CONFIG_MAC80211_HT_DEBUG
1256 if (net_ratelimit())
1257 printk(KERN_DEBUG
"unexpected AddBA Req from "
1259 print_mac(mac
, mgmt
->sa
), tid
);
1260 #endif /* CONFIG_MAC80211_HT_DEBUG */
1264 /* prepare A-MPDU MLME for Rx aggregation */
1265 sta
->ampdu_mlme
.tid_rx
[tid
] =
1266 kmalloc(sizeof(struct tid_ampdu_rx
), GFP_ATOMIC
);
1267 if (!sta
->ampdu_mlme
.tid_rx
[tid
]) {
1268 #ifdef CONFIG_MAC80211_HT_DEBUG
1269 if (net_ratelimit())
1270 printk(KERN_ERR
"allocate rx mlme to tid %d failed\n",
1276 sta
->ampdu_mlme
.tid_rx
[tid
]->session_timer
.function
=
1277 sta_rx_agg_session_timer_expired
;
1278 sta
->ampdu_mlme
.tid_rx
[tid
]->session_timer
.data
=
1279 (unsigned long)&sta
->timer_to_tid
[tid
];
1280 init_timer(&sta
->ampdu_mlme
.tid_rx
[tid
]->session_timer
);
1282 tid_agg_rx
= sta
->ampdu_mlme
.tid_rx
[tid
];
1284 /* prepare reordering buffer */
1285 tid_agg_rx
->reorder_buf
=
1286 kmalloc(buf_size
* sizeof(struct sk_buff
*), GFP_ATOMIC
);
1287 if (!tid_agg_rx
->reorder_buf
) {
1288 #ifdef CONFIG_MAC80211_HT_DEBUG
1289 if (net_ratelimit())
1290 printk(KERN_ERR
"can not allocate reordering buffer "
1291 "to tid %d\n", tid
);
1293 kfree(sta
->ampdu_mlme
.tid_rx
[tid
]);
1296 memset(tid_agg_rx
->reorder_buf
, 0,
1297 buf_size
* sizeof(struct sk_buff
*));
1299 if (local
->ops
->ampdu_action
)
1300 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_RX_START
,
1301 sta
->addr
, tid
, &start_seq_num
);
1302 #ifdef CONFIG_MAC80211_HT_DEBUG
1303 printk(KERN_DEBUG
"Rx A-MPDU request on tid %d result %d\n", tid
, ret
);
1304 #endif /* CONFIG_MAC80211_HT_DEBUG */
1307 kfree(tid_agg_rx
->reorder_buf
);
1309 sta
->ampdu_mlme
.tid_rx
[tid
] = NULL
;
1313 /* change state and send addba resp */
1314 sta
->ampdu_mlme
.tid_state_rx
[tid
] = HT_AGG_STATE_OPERATIONAL
;
1315 tid_agg_rx
->dialog_token
= dialog_token
;
1316 tid_agg_rx
->ssn
= start_seq_num
;
1317 tid_agg_rx
->head_seq_num
= start_seq_num
;
1318 tid_agg_rx
->buf_size
= buf_size
;
1319 tid_agg_rx
->timeout
= timeout
;
1320 tid_agg_rx
->stored_mpdu_num
= 0;
1321 status
= WLAN_STATUS_SUCCESS
;
1323 spin_unlock_bh(&sta
->lock
);
1326 ieee80211_send_addba_resp(sta
->sdata
, sta
->addr
, tid
,
1327 dialog_token
, status
, 1, buf_size
, timeout
);
1331 static void ieee80211_sta_process_addba_resp(struct ieee80211_local
*local
,
1332 struct ieee80211_mgmt
*mgmt
,
1335 struct ieee80211_hw
*hw
= &local
->hw
;
1336 struct sta_info
*sta
;
1343 sta
= sta_info_get(local
, mgmt
->sa
);
1349 capab
= le16_to_cpu(mgmt
->u
.action
.u
.addba_resp
.capab
);
1350 tid
= (capab
& IEEE80211_ADDBA_PARAM_TID_MASK
) >> 2;
1352 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
1354 spin_lock_bh(&sta
->lock
);
1356 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
1357 spin_unlock_bh(&sta
->lock
);
1358 goto addba_resp_exit
;
1361 if (mgmt
->u
.action
.u
.addba_resp
.dialog_token
!=
1362 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
) {
1363 spin_unlock_bh(&sta
->lock
);
1364 #ifdef CONFIG_MAC80211_HT_DEBUG
1365 printk(KERN_DEBUG
"wrong addBA response token, tid %d\n", tid
);
1366 #endif /* CONFIG_MAC80211_HT_DEBUG */
1367 goto addba_resp_exit
;
1370 del_timer_sync(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
1371 #ifdef CONFIG_MAC80211_HT_DEBUG
1372 printk(KERN_DEBUG
"switched off addBA timer for tid %d \n", tid
);
1373 #endif /* CONFIG_MAC80211_HT_DEBUG */
1374 if (le16_to_cpu(mgmt
->u
.action
.u
.addba_resp
.status
)
1375 == WLAN_STATUS_SUCCESS
) {
1376 *state
|= HT_ADDBA_RECEIVED_MSK
;
1377 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
1379 if (*state
== HT_AGG_STATE_OPERATIONAL
)
1380 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
1382 spin_unlock_bh(&sta
->lock
);
1384 sta
->ampdu_mlme
.addba_req_num
[tid
]++;
1385 /* this will allow the state check in stop_BA_session */
1386 *state
= HT_AGG_STATE_OPERATIONAL
;
1387 spin_unlock_bh(&sta
->lock
);
1388 ieee80211_stop_tx_ba_session(hw
, sta
->addr
, tid
,
1389 WLAN_BACK_INITIATOR
);
1396 void ieee80211_send_delba(struct ieee80211_sub_if_data
*sdata
, const u8
*da
, u16 tid
,
1397 u16 initiator
, u16 reason_code
)
1399 struct ieee80211_local
*local
= sdata
->local
;
1400 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1401 struct sk_buff
*skb
;
1402 struct ieee80211_mgmt
*mgmt
;
1405 skb
= dev_alloc_skb(sizeof(*mgmt
) + local
->hw
.extra_tx_headroom
);
1408 printk(KERN_ERR
"%s: failed to allocate buffer "
1409 "for delba frame\n", sdata
->dev
->name
);
1413 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1414 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
1415 memset(mgmt
, 0, 24);
1416 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1417 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1418 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
1419 memcpy(mgmt
->bssid
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1421 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
1422 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1423 IEEE80211_STYPE_ACTION
);
1425 skb_put(skb
, 1 + sizeof(mgmt
->u
.action
.u
.delba
));
1427 mgmt
->u
.action
.category
= WLAN_CATEGORY_BACK
;
1428 mgmt
->u
.action
.u
.delba
.action_code
= WLAN_ACTION_DELBA
;
1429 params
= (u16
)(initiator
<< 11); /* bit 11 initiator */
1430 params
|= (u16
)(tid
<< 12); /* bit 15:12 TID number */
1432 mgmt
->u
.action
.u
.delba
.params
= cpu_to_le16(params
);
1433 mgmt
->u
.action
.u
.delba
.reason_code
= cpu_to_le16(reason_code
);
1435 ieee80211_sta_tx(sdata
, skb
, 0);
1438 void ieee80211_send_bar(struct ieee80211_sub_if_data
*sdata
, u8
*ra
, u16 tid
, u16 ssn
)
1440 struct ieee80211_local
*local
= sdata
->local
;
1441 struct sk_buff
*skb
;
1442 struct ieee80211_bar
*bar
;
1443 u16 bar_control
= 0;
1445 skb
= dev_alloc_skb(sizeof(*bar
) + local
->hw
.extra_tx_headroom
);
1447 printk(KERN_ERR
"%s: failed to allocate buffer for "
1448 "bar frame\n", sdata
->dev
->name
);
1451 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1452 bar
= (struct ieee80211_bar
*)skb_put(skb
, sizeof(*bar
));
1453 memset(bar
, 0, sizeof(*bar
));
1454 bar
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_CTL
|
1455 IEEE80211_STYPE_BACK_REQ
);
1456 memcpy(bar
->ra
, ra
, ETH_ALEN
);
1457 memcpy(bar
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1458 bar_control
|= (u16
)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL
;
1459 bar_control
|= (u16
)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA
;
1460 bar_control
|= (u16
)(tid
<< 12);
1461 bar
->control
= cpu_to_le16(bar_control
);
1462 bar
->start_seq_num
= cpu_to_le16(ssn
);
1464 ieee80211_sta_tx(sdata
, skb
, 0);
1467 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data
*sdata
, u8
*ra
, u16 tid
,
1468 u16 initiator
, u16 reason
)
1470 struct ieee80211_local
*local
= sdata
->local
;
1471 struct ieee80211_hw
*hw
= &local
->hw
;
1472 struct sta_info
*sta
;
1474 DECLARE_MAC_BUF(mac
);
1478 sta
= sta_info_get(local
, ra
);
1484 /* check if TID is in operational state */
1485 spin_lock_bh(&sta
->lock
);
1486 if (sta
->ampdu_mlme
.tid_state_rx
[tid
]
1487 != HT_AGG_STATE_OPERATIONAL
) {
1488 spin_unlock_bh(&sta
->lock
);
1492 sta
->ampdu_mlme
.tid_state_rx
[tid
] =
1493 HT_AGG_STATE_REQ_STOP_BA_MSK
|
1494 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
1495 spin_unlock_bh(&sta
->lock
);
1497 /* stop HW Rx aggregation. ampdu_action existence
1498 * already verified in session init so we add the BUG_ON */
1499 BUG_ON(!local
->ops
->ampdu_action
);
1501 #ifdef CONFIG_MAC80211_HT_DEBUG
1502 printk(KERN_DEBUG
"Rx BA session stop requested for %s tid %u\n",
1503 print_mac(mac
, ra
), tid
);
1504 #endif /* CONFIG_MAC80211_HT_DEBUG */
1506 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_RX_STOP
,
1509 printk(KERN_DEBUG
"HW problem - can not stop rx "
1510 "aggregation for tid %d\n", tid
);
1512 /* shutdown timer has not expired */
1513 if (initiator
!= WLAN_BACK_TIMER
)
1514 del_timer_sync(&sta
->ampdu_mlme
.tid_rx
[tid
]->session_timer
);
1516 /* check if this is a self generated aggregation halt */
1517 if (initiator
== WLAN_BACK_RECIPIENT
|| initiator
== WLAN_BACK_TIMER
)
1518 ieee80211_send_delba(sdata
, ra
, tid
, 0, reason
);
1520 /* free the reordering buffer */
1521 for (i
= 0; i
< sta
->ampdu_mlme
.tid_rx
[tid
]->buf_size
; i
++) {
1522 if (sta
->ampdu_mlme
.tid_rx
[tid
]->reorder_buf
[i
]) {
1523 /* release the reordered frames */
1524 dev_kfree_skb(sta
->ampdu_mlme
.tid_rx
[tid
]->reorder_buf
[i
]);
1525 sta
->ampdu_mlme
.tid_rx
[tid
]->stored_mpdu_num
--;
1526 sta
->ampdu_mlme
.tid_rx
[tid
]->reorder_buf
[i
] = NULL
;
1529 /* free resources */
1530 kfree(sta
->ampdu_mlme
.tid_rx
[tid
]->reorder_buf
);
1531 kfree(sta
->ampdu_mlme
.tid_rx
[tid
]);
1532 sta
->ampdu_mlme
.tid_rx
[tid
] = NULL
;
1533 sta
->ampdu_mlme
.tid_state_rx
[tid
] = HT_AGG_STATE_IDLE
;
1539 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data
*sdata
,
1540 struct ieee80211_mgmt
*mgmt
, size_t len
)
1542 struct ieee80211_local
*local
= sdata
->local
;
1543 struct sta_info
*sta
;
1546 DECLARE_MAC_BUF(mac
);
1550 sta
= sta_info_get(local
, mgmt
->sa
);
1556 params
= le16_to_cpu(mgmt
->u
.action
.u
.delba
.params
);
1557 tid
= (params
& IEEE80211_DELBA_PARAM_TID_MASK
) >> 12;
1558 initiator
= (params
& IEEE80211_DELBA_PARAM_INITIATOR_MASK
) >> 11;
1560 #ifdef CONFIG_MAC80211_HT_DEBUG
1561 if (net_ratelimit())
1562 printk(KERN_DEBUG
"delba from %s (%s) tid %d reason code %d\n",
1563 print_mac(mac
, mgmt
->sa
),
1564 initiator
? "initiator" : "recipient", tid
,
1565 mgmt
->u
.action
.u
.delba
.reason_code
);
1566 #endif /* CONFIG_MAC80211_HT_DEBUG */
1568 if (initiator
== WLAN_BACK_INITIATOR
)
1569 ieee80211_sta_stop_rx_ba_session(sdata
, sta
->addr
, tid
,
1570 WLAN_BACK_INITIATOR
, 0);
1571 else { /* WLAN_BACK_RECIPIENT */
1572 spin_lock_bh(&sta
->lock
);
1573 sta
->ampdu_mlme
.tid_state_tx
[tid
] =
1574 HT_AGG_STATE_OPERATIONAL
;
1575 spin_unlock_bh(&sta
->lock
);
1576 ieee80211_stop_tx_ba_session(&local
->hw
, sta
->addr
, tid
,
1577 WLAN_BACK_RECIPIENT
);
1583 * After sending add Block Ack request we activated a timer until
1584 * add Block Ack response will arrive from the recipient.
1585 * If this timer expires sta_addba_resp_timer_expired will be executed.
1587 void sta_addba_resp_timer_expired(unsigned long data
)
1589 /* not an elegant detour, but there is no choice as the timer passes
1590 * only one argument, and both sta_info and TID are needed, so init
1591 * flow in sta_info_create gives the TID as data, while the timer_to_id
1592 * array gives the sta through container_of */
1593 u16 tid
= *(u8
*)data
;
1594 struct sta_info
*temp_sta
= container_of((void *)data
,
1595 struct sta_info
, timer_to_tid
[tid
]);
1597 struct ieee80211_local
*local
= temp_sta
->local
;
1598 struct ieee80211_hw
*hw
= &local
->hw
;
1599 struct sta_info
*sta
;
1604 sta
= sta_info_get(local
, temp_sta
->addr
);
1610 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
1611 /* check if the TID waits for addBA response */
1612 spin_lock_bh(&sta
->lock
);
1613 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
1614 spin_unlock_bh(&sta
->lock
);
1615 *state
= HT_AGG_STATE_IDLE
;
1616 #ifdef CONFIG_MAC80211_HT_DEBUG
1617 printk(KERN_DEBUG
"timer expired on tid %d but we are not "
1618 "expecting addBA response there", tid
);
1620 goto timer_expired_exit
;
1623 #ifdef CONFIG_MAC80211_HT_DEBUG
1624 printk(KERN_DEBUG
"addBA response timer expired on tid %d\n", tid
);
1627 /* go through the state check in stop_BA_session */
1628 *state
= HT_AGG_STATE_OPERATIONAL
;
1629 spin_unlock_bh(&sta
->lock
);
1630 ieee80211_stop_tx_ba_session(hw
, temp_sta
->addr
, tid
,
1631 WLAN_BACK_INITIATOR
);
1638 * After accepting the AddBA Request we activated a timer,
1639 * resetting it after each frame that arrives from the originator.
1640 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1642 static void sta_rx_agg_session_timer_expired(unsigned long data
)
1644 /* not an elegant detour, but there is no choice as the timer passes
1645 * only one argument, and various sta_info are needed here, so init
1646 * flow in sta_info_create gives the TID as data, while the timer_to_id
1647 * array gives the sta through container_of */
1648 u8
*ptid
= (u8
*)data
;
1649 u8
*timer_to_id
= ptid
- *ptid
;
1650 struct sta_info
*sta
= container_of(timer_to_id
, struct sta_info
,
1653 #ifdef CONFIG_MAC80211_HT_DEBUG
1654 printk(KERN_DEBUG
"rx session timer expired on tid %d\n", (u16
)*ptid
);
1656 ieee80211_sta_stop_rx_ba_session(sta
->sdata
, sta
->addr
,
1657 (u16
)*ptid
, WLAN_BACK_TIMER
,
1658 WLAN_REASON_QSTA_TIMEOUT
);
1661 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data
*sdata
, u8
*addr
)
1663 struct ieee80211_local
*local
= sdata
->local
;
1666 for (i
= 0; i
< STA_TID_NUM
; i
++) {
1667 ieee80211_stop_tx_ba_session(&local
->hw
, addr
, i
,
1668 WLAN_BACK_INITIATOR
);
1669 ieee80211_sta_stop_rx_ba_session(sdata
, addr
, i
,
1670 WLAN_BACK_RECIPIENT
,
1671 WLAN_REASON_QSTA_LEAVE_QBSS
);
1675 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data
*sdata
,
1676 struct ieee80211_msrment_ie
*request_ie
,
1677 const u8
*da
, const u8
*bssid
,
1680 struct ieee80211_local
*local
= sdata
->local
;
1681 struct sk_buff
*skb
;
1682 struct ieee80211_mgmt
*msr_report
;
1684 skb
= dev_alloc_skb(sizeof(*msr_report
) + local
->hw
.extra_tx_headroom
+
1685 sizeof(struct ieee80211_msrment_ie
));
1688 printk(KERN_ERR
"%s: failed to allocate buffer for "
1689 "measurement report frame\n", sdata
->dev
->name
);
1693 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1694 msr_report
= (struct ieee80211_mgmt
*)skb_put(skb
, 24);
1695 memset(msr_report
, 0, 24);
1696 memcpy(msr_report
->da
, da
, ETH_ALEN
);
1697 memcpy(msr_report
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1698 memcpy(msr_report
->bssid
, bssid
, ETH_ALEN
);
1699 msr_report
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1700 IEEE80211_STYPE_ACTION
);
1702 skb_put(skb
, 1 + sizeof(msr_report
->u
.action
.u
.measurement
));
1703 msr_report
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
1704 msr_report
->u
.action
.u
.measurement
.action_code
=
1705 WLAN_ACTION_SPCT_MSR_RPRT
;
1706 msr_report
->u
.action
.u
.measurement
.dialog_token
= dialog_token
;
1708 msr_report
->u
.action
.u
.measurement
.element_id
= WLAN_EID_MEASURE_REPORT
;
1709 msr_report
->u
.action
.u
.measurement
.length
=
1710 sizeof(struct ieee80211_msrment_ie
);
1712 memset(&msr_report
->u
.action
.u
.measurement
.msr_elem
, 0,
1713 sizeof(struct ieee80211_msrment_ie
));
1714 msr_report
->u
.action
.u
.measurement
.msr_elem
.token
= request_ie
->token
;
1715 msr_report
->u
.action
.u
.measurement
.msr_elem
.mode
|=
1716 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED
;
1717 msr_report
->u
.action
.u
.measurement
.msr_elem
.type
= request_ie
->type
;
1719 ieee80211_sta_tx(sdata
, skb
, 0);
1722 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data
*sdata
,
1723 struct ieee80211_mgmt
*mgmt
,
1727 * Ignoring measurement request is spec violation.
1728 * Mandatory measurements must be reported optional
1729 * measurements might be refused or reported incapable
1730 * For now just refuse
1731 * TODO: Answer basic measurement as unmeasured
1733 ieee80211_send_refuse_measurement_request(sdata
,
1734 &mgmt
->u
.action
.u
.measurement
.msr_elem
,
1735 mgmt
->sa
, mgmt
->bssid
,
1736 mgmt
->u
.action
.u
.measurement
.dialog_token
);
1740 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1741 struct ieee80211_if_sta
*ifsta
,
1742 struct ieee80211_mgmt
*mgmt
,
1745 u16 auth_alg
, auth_transaction
, status_code
;
1746 DECLARE_MAC_BUF(mac
);
1748 if (ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
1749 sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
)
1755 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
&&
1756 memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1759 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
&&
1760 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1763 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1764 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1765 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1767 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
1769 * IEEE 802.11 standard does not require authentication in IBSS
1770 * networks and most implementations do not seem to use it.
1771 * However, try to reply to authentication attempts if someone
1772 * has actually implemented this.
1774 if (auth_alg
!= WLAN_AUTH_OPEN
|| auth_transaction
!= 1)
1776 ieee80211_send_auth(sdata
, ifsta
, 2, NULL
, 0, 0);
1779 if (auth_alg
!= ifsta
->auth_alg
||
1780 auth_transaction
!= ifsta
->auth_transaction
)
1783 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1784 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1786 const int num_algs
= ARRAY_SIZE(algs
);
1788 algs
[0] = algs
[1] = algs
[2] = 0xff;
1789 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1790 algs
[0] = WLAN_AUTH_OPEN
;
1791 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1792 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1793 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1794 algs
[2] = WLAN_AUTH_LEAP
;
1795 if (ifsta
->auth_alg
== WLAN_AUTH_OPEN
)
1797 else if (ifsta
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1801 for (i
= 0; i
< num_algs
; i
++) {
1803 if (pos
>= num_algs
)
1805 if (algs
[pos
] == ifsta
->auth_alg
||
1808 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1809 !ieee80211_sta_wep_configured(sdata
))
1811 ifsta
->auth_alg
= algs
[pos
];
1818 switch (ifsta
->auth_alg
) {
1819 case WLAN_AUTH_OPEN
:
1820 case WLAN_AUTH_LEAP
:
1821 ieee80211_auth_completed(sdata
, ifsta
);
1823 case WLAN_AUTH_SHARED_KEY
:
1824 if (ifsta
->auth_transaction
== 4)
1825 ieee80211_auth_completed(sdata
, ifsta
);
1827 ieee80211_auth_challenge(sdata
, ifsta
, mgmt
, len
);
1833 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1834 struct ieee80211_if_sta
*ifsta
,
1835 struct ieee80211_mgmt
*mgmt
,
1839 DECLARE_MAC_BUF(mac
);
1844 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1847 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1849 if (ifsta
->flags
& IEEE80211_STA_AUTHENTICATED
)
1850 printk(KERN_DEBUG
"%s: deauthenticated\n", sdata
->dev
->name
);
1852 if (ifsta
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1853 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1854 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1855 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1856 mod_timer(&ifsta
->timer
, jiffies
+
1857 IEEE80211_RETRY_AUTH_INTERVAL
);
1860 ieee80211_set_disassoc(sdata
, ifsta
, true, false, 0);
1861 ifsta
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1865 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1866 struct ieee80211_if_sta
*ifsta
,
1867 struct ieee80211_mgmt
*mgmt
,
1871 DECLARE_MAC_BUF(mac
);
1876 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1879 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1881 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
1882 printk(KERN_DEBUG
"%s: disassociated\n", sdata
->dev
->name
);
1884 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1885 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1886 mod_timer(&ifsta
->timer
, jiffies
+
1887 IEEE80211_RETRY_AUTH_INTERVAL
);
1890 ieee80211_set_disassoc(sdata
, ifsta
, false, false, 0);
1894 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1895 struct ieee80211_if_sta
*ifsta
,
1896 struct ieee80211_mgmt
*mgmt
,
1900 struct ieee80211_local
*local
= sdata
->local
;
1901 struct ieee80211_supported_band
*sband
;
1902 struct sta_info
*sta
;
1903 u64 rates
, basic_rates
;
1904 u16 capab_info
, status_code
, aid
;
1905 struct ieee802_11_elems elems
;
1906 struct ieee80211_bss_conf
*bss_conf
= &sdata
->bss_conf
;
1909 DECLARE_MAC_BUF(mac
);
1910 bool have_higher_than_11mbit
= false;
1912 /* AssocResp and ReassocResp have identical structure, so process both
1913 * of them in this function. */
1915 if (ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1921 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1924 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1925 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1926 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1928 printk(KERN_DEBUG
"%s: RX %sssocResp from %s (capab=0x%x "
1929 "status=%d aid=%d)\n",
1930 sdata
->dev
->name
, reassoc
? "Rea" : "A", print_mac(mac
, mgmt
->sa
),
1931 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1933 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1934 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1935 sdata
->dev
->name
, status_code
);
1936 /* if this was a reassociation, ensure we try a "full"
1937 * association next time. This works around some broken APs
1938 * which do not correctly reject reassociation requests. */
1939 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1943 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1944 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1945 "set\n", sdata
->dev
->name
, aid
);
1946 aid
&= ~(BIT(15) | BIT(14));
1948 pos
= mgmt
->u
.assoc_resp
.variable
;
1949 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1951 if (!elems
.supp_rates
) {
1952 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1957 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1959 ifsta
->ap_capab
= capab_info
;
1961 kfree(ifsta
->assocresp_ies
);
1962 ifsta
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1963 ifsta
->assocresp_ies
= kmalloc(ifsta
->assocresp_ies_len
, GFP_KERNEL
);
1964 if (ifsta
->assocresp_ies
)
1965 memcpy(ifsta
->assocresp_ies
, pos
, ifsta
->assocresp_ies_len
);
1969 /* Add STA entry for the AP */
1970 sta
= sta_info_get(local
, ifsta
->bssid
);
1972 struct ieee80211_sta_bss
*bss
;
1975 sta
= sta_info_alloc(sdata
, ifsta
->bssid
, GFP_ATOMIC
);
1977 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1978 " the AP\n", sdata
->dev
->name
);
1982 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
1983 local
->hw
.conf
.channel
->center_freq
,
1984 ifsta
->ssid
, ifsta
->ssid_len
);
1986 sta
->last_signal
= bss
->signal
;
1987 sta
->last_qual
= bss
->qual
;
1988 sta
->last_noise
= bss
->noise
;
1989 ieee80211_rx_bss_put(local
, bss
);
1992 err
= sta_info_insert(sta
);
1994 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1995 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1999 /* update new sta with its last rx activity */
2000 sta
->last_rx
= jiffies
;
2004 * FIXME: Do we really need to update the sta_info's information here?
2005 * We already know about the AP (we found it in our list) so it
2006 * should already be filled with the right info, no?
2007 * As is stands, all this is racy because typically we assume
2008 * the information that is filled in here (except flags) doesn't
2009 * change while a STA structure is alive. As such, it should move
2010 * to between the sta_info_alloc() and sta_info_insert() above.
2013 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
2014 WLAN_STA_AUTHORIZED
);
2018 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2020 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
2021 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
2024 have_higher_than_11mbit
= true;
2026 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2027 if (sband
->bitrates
[j
].bitrate
== rate
)
2029 if (elems
.supp_rates
[i
] & 0x80)
2030 basic_rates
|= BIT(j
);
2034 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
2035 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
2038 have_higher_than_11mbit
= true;
2040 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2041 if (sband
->bitrates
[j
].bitrate
== rate
)
2043 if (elems
.ext_supp_rates
[i
] & 0x80)
2044 basic_rates
|= BIT(j
);
2048 sta
->supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
2049 sdata
->basic_rates
= basic_rates
;
2051 /* cf. IEEE 802.11 9.2.12 */
2052 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
2053 have_higher_than_11mbit
)
2054 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
2056 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
2058 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
2059 (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
2060 struct ieee80211_ht_bss_info bss_info
;
2061 ieee80211_ht_cap_ie_to_ht_info(
2062 (struct ieee80211_ht_cap
*)
2063 elems
.ht_cap_elem
, &sta
->ht_info
);
2064 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2065 (struct ieee80211_ht_addt_info
*)
2066 elems
.ht_info_elem
, &bss_info
);
2067 ieee80211_handle_ht(local
, 1, &sta
->ht_info
, &bss_info
);
2070 rate_control_rate_init(sta
, local
);
2072 if (elems
.wmm_param
) {
2073 set_sta_flags(sta
, WLAN_STA_WME
);
2075 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
2076 elems
.wmm_param_len
);
2080 /* set AID and assoc capability,
2081 * ieee80211_set_associated() will tell the driver */
2082 bss_conf
->aid
= aid
;
2083 bss_conf
->assoc_capability
= capab_info
;
2084 ieee80211_set_associated(sdata
, ifsta
, 1);
2086 ieee80211_associated(sdata
, ifsta
);
2090 /* Caller must hold local->sta_bss_lock */
2091 static void __ieee80211_rx_bss_hash_add(struct ieee80211_local
*local
,
2092 struct ieee80211_sta_bss
*bss
)
2096 if (bss_mesh_cfg(bss
))
2097 hash_idx
= mesh_id_hash(bss_mesh_id(bss
),
2098 bss_mesh_id_len(bss
));
2100 hash_idx
= STA_HASH(bss
->bssid
);
2102 bss
->hnext
= local
->sta_bss_hash
[hash_idx
];
2103 local
->sta_bss_hash
[hash_idx
] = bss
;
2107 /* Caller must hold local->sta_bss_lock */
2108 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local
*local
,
2109 struct ieee80211_sta_bss
*bss
)
2111 struct ieee80211_sta_bss
*b
, *prev
= NULL
;
2112 b
= local
->sta_bss_hash
[STA_HASH(bss
->bssid
)];
2116 local
->sta_bss_hash
[STA_HASH(bss
->bssid
)] =
2119 prev
->hnext
= bss
->hnext
;
2128 static struct ieee80211_sta_bss
*
2129 ieee80211_rx_bss_add(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
, int freq
,
2130 u8
*ssid
, u8 ssid_len
)
2132 struct ieee80211_local
*local
= sdata
->local
;
2133 struct ieee80211_sta_bss
*bss
;
2135 bss
= kzalloc(sizeof(*bss
), GFP_ATOMIC
);
2138 atomic_inc(&bss
->users
);
2139 atomic_inc(&bss
->users
);
2140 memcpy(bss
->bssid
, bssid
, ETH_ALEN
);
2142 if (ssid
&& ssid_len
<= IEEE80211_MAX_SSID_LEN
) {
2143 memcpy(bss
->ssid
, ssid
, ssid_len
);
2144 bss
->ssid_len
= ssid_len
;
2147 spin_lock_bh(&local
->sta_bss_lock
);
2148 /* TODO: order by RSSI? */
2149 list_add_tail(&bss
->list
, &local
->sta_bss_list
);
2150 __ieee80211_rx_bss_hash_add(local
, bss
);
2151 spin_unlock_bh(&local
->sta_bss_lock
);
2155 static struct ieee80211_sta_bss
*
2156 ieee80211_rx_bss_get(struct ieee80211_local
*local
, u8
*bssid
, int freq
,
2157 u8
*ssid
, u8 ssid_len
)
2159 struct ieee80211_sta_bss
*bss
;
2161 spin_lock_bh(&local
->sta_bss_lock
);
2162 bss
= local
->sta_bss_hash
[STA_HASH(bssid
)];
2164 if (!bss_mesh_cfg(bss
) &&
2165 !memcmp(bss
->bssid
, bssid
, ETH_ALEN
) &&
2166 bss
->freq
== freq
&&
2167 bss
->ssid_len
== ssid_len
&&
2168 (ssid_len
== 0 || !memcmp(bss
->ssid
, ssid
, ssid_len
))) {
2169 atomic_inc(&bss
->users
);
2174 spin_unlock_bh(&local
->sta_bss_lock
);
2178 #ifdef CONFIG_MAC80211_MESH
2179 static struct ieee80211_sta_bss
*
2180 ieee80211_rx_mesh_bss_get(struct ieee80211_local
*local
, u8
*mesh_id
, int mesh_id_len
,
2181 u8
*mesh_cfg
, int freq
)
2183 struct ieee80211_sta_bss
*bss
;
2185 spin_lock_bh(&local
->sta_bss_lock
);
2186 bss
= local
->sta_bss_hash
[mesh_id_hash(mesh_id
, mesh_id_len
)];
2188 if (bss_mesh_cfg(bss
) &&
2189 !memcmp(bss_mesh_cfg(bss
), mesh_cfg
, MESH_CFG_CMP_LEN
) &&
2190 bss
->freq
== freq
&&
2191 mesh_id_len
== bss
->mesh_id_len
&&
2192 (mesh_id_len
== 0 || !memcmp(bss
->mesh_id
, mesh_id
,
2194 atomic_inc(&bss
->users
);
2199 spin_unlock_bh(&local
->sta_bss_lock
);
2203 static struct ieee80211_sta_bss
*
2204 ieee80211_rx_mesh_bss_add(struct ieee80211_local
*local
, u8
*mesh_id
, int mesh_id_len
,
2205 u8
*mesh_cfg
, int mesh_config_len
, int freq
)
2207 struct ieee80211_sta_bss
*bss
;
2209 if (mesh_config_len
!= MESH_CFG_LEN
)
2212 bss
= kzalloc(sizeof(*bss
), GFP_ATOMIC
);
2216 bss
->mesh_cfg
= kmalloc(MESH_CFG_CMP_LEN
, GFP_ATOMIC
);
2217 if (!bss
->mesh_cfg
) {
2222 if (mesh_id_len
&& mesh_id_len
<= IEEE80211_MAX_MESH_ID_LEN
) {
2223 bss
->mesh_id
= kmalloc(mesh_id_len
, GFP_ATOMIC
);
2224 if (!bss
->mesh_id
) {
2225 kfree(bss
->mesh_cfg
);
2229 memcpy(bss
->mesh_id
, mesh_id
, mesh_id_len
);
2232 atomic_inc(&bss
->users
);
2233 atomic_inc(&bss
->users
);
2234 memcpy(bss
->mesh_cfg
, mesh_cfg
, MESH_CFG_CMP_LEN
);
2235 bss
->mesh_id_len
= mesh_id_len
;
2237 spin_lock_bh(&local
->sta_bss_lock
);
2238 /* TODO: order by RSSI? */
2239 list_add_tail(&bss
->list
, &local
->sta_bss_list
);
2240 __ieee80211_rx_bss_hash_add(local
, bss
);
2241 spin_unlock_bh(&local
->sta_bss_lock
);
2246 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss
*bss
)
2249 kfree(bss_mesh_id(bss
));
2250 kfree(bss_mesh_cfg(bss
));
2255 static void ieee80211_rx_bss_put(struct ieee80211_local
*local
,
2256 struct ieee80211_sta_bss
*bss
)
2259 if (!atomic_dec_and_lock(&bss
->users
, &local
->sta_bss_lock
)) {
2264 __ieee80211_rx_bss_hash_del(local
, bss
);
2265 list_del(&bss
->list
);
2266 spin_unlock_bh(&local
->sta_bss_lock
);
2267 ieee80211_rx_bss_free(bss
);
2271 void ieee80211_rx_bss_list_init(struct ieee80211_local
*local
)
2273 spin_lock_init(&local
->sta_bss_lock
);
2274 INIT_LIST_HEAD(&local
->sta_bss_list
);
2278 void ieee80211_rx_bss_list_deinit(struct ieee80211_local
*local
)
2280 struct ieee80211_sta_bss
*bss
, *tmp
;
2282 list_for_each_entry_safe(bss
, tmp
, &local
->sta_bss_list
, list
)
2283 ieee80211_rx_bss_put(local
, bss
);
2287 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data
*sdata
,
2288 struct ieee80211_if_sta
*ifsta
,
2289 struct ieee80211_sta_bss
*bss
)
2291 struct ieee80211_local
*local
= sdata
->local
;
2292 int res
, rates
, i
, j
;
2293 struct sk_buff
*skb
;
2294 struct ieee80211_mgmt
*mgmt
;
2296 struct ieee80211_supported_band
*sband
;
2297 union iwreq_data wrqu
;
2299 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2301 /* Remove possible STA entries from other IBSS networks. */
2302 sta_info_flush_delayed(sdata
);
2304 if (local
->ops
->reset_tsf
) {
2305 /* Reset own TSF to allow time synchronization work. */
2306 local
->ops
->reset_tsf(local_to_hw(local
));
2308 memcpy(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
);
2309 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
2313 local
->hw
.conf
.beacon_int
= bss
->beacon_int
>= 10 ? bss
->beacon_int
: 10;
2315 sdata
->drop_unencrypted
= bss
->capability
&
2316 WLAN_CAPABILITY_PRIVACY
? 1 : 0;
2318 res
= ieee80211_set_freq(sdata
, bss
->freq
);
2323 /* Build IBSS probe response */
2324 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 400);
2326 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2328 mgmt
= (struct ieee80211_mgmt
*)
2329 skb_put(skb
, 24 + sizeof(mgmt
->u
.beacon
));
2330 memset(mgmt
, 0, 24 + sizeof(mgmt
->u
.beacon
));
2331 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2332 IEEE80211_STYPE_PROBE_RESP
);
2333 memset(mgmt
->da
, 0xff, ETH_ALEN
);
2334 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
2335 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
2336 mgmt
->u
.beacon
.beacon_int
=
2337 cpu_to_le16(local
->hw
.conf
.beacon_int
);
2338 mgmt
->u
.beacon
.timestamp
= cpu_to_le64(bss
->timestamp
);
2339 mgmt
->u
.beacon
.capab_info
= cpu_to_le16(bss
->capability
);
2341 pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
2342 *pos
++ = WLAN_EID_SSID
;
2343 *pos
++ = ifsta
->ssid_len
;
2344 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
2346 rates
= bss
->supp_rates_len
;
2349 pos
= skb_put(skb
, 2 + rates
);
2350 *pos
++ = WLAN_EID_SUPP_RATES
;
2352 memcpy(pos
, bss
->supp_rates
, rates
);
2354 if (bss
->band
== IEEE80211_BAND_2GHZ
) {
2355 pos
= skb_put(skb
, 2 + 1);
2356 *pos
++ = WLAN_EID_DS_PARAMS
;
2358 *pos
++ = ieee80211_frequency_to_channel(bss
->freq
);
2361 pos
= skb_put(skb
, 2 + 2);
2362 *pos
++ = WLAN_EID_IBSS_PARAMS
;
2364 /* FIX: set ATIM window based on scan results */
2368 if (bss
->supp_rates_len
> 8) {
2369 rates
= bss
->supp_rates_len
- 8;
2370 pos
= skb_put(skb
, 2 + rates
);
2371 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2373 memcpy(pos
, &bss
->supp_rates
[8], rates
);
2376 ifsta
->probe_resp
= skb
;
2378 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
);
2382 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2383 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
2384 int bitrate
= (bss
->supp_rates
[i
] & 0x7f) * 5;
2385 for (j
= 0; j
< sband
->n_bitrates
; j
++)
2386 if (sband
->bitrates
[j
].bitrate
== bitrate
)
2389 ifsta
->supp_rates_bits
[local
->hw
.conf
.channel
->band
] = rates
;
2391 ieee80211_sta_def_wmm_params(sdata
, bss
, 1);
2393 ifsta
->state
= IEEE80211_STA_MLME_IBSS_JOINED
;
2394 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
2396 memset(&wrqu
, 0, sizeof(wrqu
));
2397 memcpy(wrqu
.ap_addr
.sa_data
, bss
->bssid
, ETH_ALEN
);
2398 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
2403 u64
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
2404 struct ieee802_11_elems
*elems
,
2405 enum ieee80211_band band
)
2407 struct ieee80211_supported_band
*sband
;
2408 struct ieee80211_rate
*bitrates
;
2412 sband
= local
->hw
.wiphy
->bands
[band
];
2416 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2419 bitrates
= sband
->bitrates
;
2420 num_rates
= sband
->n_bitrates
;
2422 for (i
= 0; i
< elems
->supp_rates_len
+
2423 elems
->ext_supp_rates_len
; i
++) {
2426 if (i
< elems
->supp_rates_len
)
2427 rate
= elems
->supp_rates
[i
];
2428 else if (elems
->ext_supp_rates
)
2429 rate
= elems
->ext_supp_rates
2430 [i
- elems
->supp_rates_len
];
2431 own_rate
= 5 * (rate
& 0x7f);
2432 for (j
= 0; j
< num_rates
; j
++)
2433 if (bitrates
[j
].bitrate
== own_rate
)
2434 supp_rates
|= BIT(j
);
2439 static u64
ieee80211_sta_get_mandatory_rates(struct ieee80211_local
*local
,
2440 enum ieee80211_band band
)
2442 struct ieee80211_supported_band
*sband
;
2443 struct ieee80211_rate
*bitrates
;
2444 u64 mandatory_rates
;
2445 enum ieee80211_rate_flags mandatory_flag
;
2448 sband
= local
->hw
.wiphy
->bands
[band
];
2451 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2454 if (band
== IEEE80211_BAND_2GHZ
)
2455 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
2457 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
2459 bitrates
= sband
->bitrates
;
2460 mandatory_rates
= 0;
2461 for (i
= 0; i
< sband
->n_bitrates
; i
++)
2462 if (bitrates
[i
].flags
& mandatory_flag
)
2463 mandatory_rates
|= BIT(i
);
2464 return mandatory_rates
;
2467 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2468 struct ieee80211_mgmt
*mgmt
,
2470 struct ieee80211_rx_status
*rx_status
,
2471 struct ieee802_11_elems
*elems
)
2473 struct ieee80211_local
*local
= sdata
->local
;
2475 struct ieee80211_sta_bss
*bss
;
2476 struct sta_info
*sta
;
2477 struct ieee80211_channel
*channel
;
2478 u64 beacon_timestamp
, rx_timestamp
;
2480 bool beacon
= ieee80211_is_beacon(mgmt
->frame_control
);
2481 enum ieee80211_band band
= rx_status
->band
;
2482 DECLARE_MAC_BUF(mac
);
2483 DECLARE_MAC_BUF(mac2
);
2485 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2486 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
2488 freq
= rx_status
->freq
;
2490 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2492 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2495 if (ieee80211_vif_is_mesh(&sdata
->vif
) && elems
->mesh_id
&&
2496 elems
->mesh_config
&& mesh_matches_local(elems
, sdata
)) {
2497 supp_rates
= ieee80211_sta_get_rates(local
, elems
, band
);
2499 mesh_neighbour_update(mgmt
->sa
, supp_rates
, sdata
,
2500 mesh_peer_accepts_plinks(elems
));
2503 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&& elems
->supp_rates
&&
2504 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0) {
2505 supp_rates
= ieee80211_sta_get_rates(local
, elems
, band
);
2509 sta
= sta_info_get(local
, mgmt
->sa
);
2513 prev_rates
= sta
->supp_rates
[band
];
2514 /* make sure mandatory rates are always added */
2515 sta
->supp_rates
[band
] = supp_rates
|
2516 ieee80211_sta_get_mandatory_rates(local
, band
);
2518 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2519 if (sta
->supp_rates
[band
] != prev_rates
)
2520 printk(KERN_DEBUG
"%s: updated supp_rates set "
2521 "for %s based on beacon info (0x%llx | "
2522 "0x%llx -> 0x%llx)\n",
2523 sdata
->dev
->name
, print_mac(mac
, sta
->addr
),
2524 (unsigned long long) prev_rates
,
2525 (unsigned long long) supp_rates
,
2526 (unsigned long long) sta
->supp_rates
[band
]);
2529 ieee80211_ibss_add_sta(sdata
, NULL
, mgmt
->bssid
,
2530 mgmt
->sa
, supp_rates
);
2536 #ifdef CONFIG_MAC80211_MESH
2537 if (elems
->mesh_config
)
2538 bss
= ieee80211_rx_mesh_bss_get(local
, elems
->mesh_id
,
2539 elems
->mesh_id_len
, elems
->mesh_config
, freq
);
2542 bss
= ieee80211_rx_bss_get(local
, mgmt
->bssid
, freq
,
2543 elems
->ssid
, elems
->ssid_len
);
2545 #ifdef CONFIG_MAC80211_MESH
2546 if (elems
->mesh_config
)
2547 bss
= ieee80211_rx_mesh_bss_add(local
, elems
->mesh_id
,
2548 elems
->mesh_id_len
, elems
->mesh_config
,
2549 elems
->mesh_config_len
, freq
);
2552 bss
= ieee80211_rx_bss_add(sdata
, mgmt
->bssid
, freq
,
2553 elems
->ssid
, elems
->ssid_len
);
2558 /* TODO: order by RSSI? */
2559 spin_lock_bh(&local
->sta_bss_lock
);
2560 list_move_tail(&bss
->list
, &local
->sta_bss_list
);
2561 spin_unlock_bh(&local
->sta_bss_lock
);
2565 /* save the ERP value so that it is available at association time */
2566 if (elems
->erp_info
&& elems
->erp_info_len
>= 1) {
2567 bss
->erp_value
= elems
->erp_info
[0];
2568 bss
->has_erp_value
= 1;
2571 bss
->beacon_int
= le16_to_cpu(mgmt
->u
.beacon
.beacon_int
);
2572 bss
->capability
= le16_to_cpu(mgmt
->u
.beacon
.capab_info
);
2575 struct ieee80211_tim_ie
*tim_ie
=
2576 (struct ieee80211_tim_ie
*)elems
->tim
;
2577 bss
->dtim_period
= tim_ie
->dtim_period
;
2580 /* set default value for buggy APs */
2581 if (!elems
->tim
|| bss
->dtim_period
== 0)
2582 bss
->dtim_period
= 1;
2584 bss
->supp_rates_len
= 0;
2585 if (elems
->supp_rates
) {
2586 clen
= IEEE80211_MAX_SUPP_RATES
- bss
->supp_rates_len
;
2587 if (clen
> elems
->supp_rates_len
)
2588 clen
= elems
->supp_rates_len
;
2589 memcpy(&bss
->supp_rates
[bss
->supp_rates_len
], elems
->supp_rates
,
2591 bss
->supp_rates_len
+= clen
;
2593 if (elems
->ext_supp_rates
) {
2594 clen
= IEEE80211_MAX_SUPP_RATES
- bss
->supp_rates_len
;
2595 if (clen
> elems
->ext_supp_rates_len
)
2596 clen
= elems
->ext_supp_rates_len
;
2597 memcpy(&bss
->supp_rates
[bss
->supp_rates_len
],
2598 elems
->ext_supp_rates
, clen
);
2599 bss
->supp_rates_len
+= clen
;
2604 beacon_timestamp
= le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2606 bss
->timestamp
= beacon_timestamp
;
2607 bss
->last_update
= jiffies
;
2608 bss
->signal
= rx_status
->signal
;
2609 bss
->noise
= rx_status
->noise
;
2610 bss
->qual
= rx_status
->qual
;
2612 bss
->last_probe_resp
= jiffies
;
2614 * In STA mode, the remaining parameters should not be overridden
2615 * by beacons because they're not necessarily accurate there.
2617 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
&&
2618 bss
->last_probe_resp
&& beacon
) {
2619 ieee80211_rx_bss_put(local
, bss
);
2623 if (bss
->ies
== NULL
|| bss
->ies_len
< elems
->total_len
) {
2625 bss
->ies
= kmalloc(elems
->total_len
, GFP_ATOMIC
);
2628 memcpy(bss
->ies
, elems
->ie_start
, elems
->total_len
);
2629 bss
->ies_len
= elems
->total_len
;
2633 bss
->wmm_used
= elems
->wmm_param
|| elems
->wmm_info
;
2635 /* check if we need to merge IBSS */
2636 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&& beacon
&&
2637 !local
->sta_sw_scanning
&& !local
->sta_hw_scanning
&&
2638 bss
->capability
& WLAN_CAPABILITY_IBSS
&&
2639 bss
->freq
== local
->oper_channel
->center_freq
&&
2640 elems
->ssid_len
== sdata
->u
.sta
.ssid_len
&&
2641 memcmp(elems
->ssid
, sdata
->u
.sta
.ssid
,
2642 sdata
->u
.sta
.ssid_len
) == 0) {
2643 if (rx_status
->flag
& RX_FLAG_TSFT
) {
2644 /* in order for correct IBSS merging we need mactime
2646 * since mactime is defined as the time the first data
2647 * symbol of the frame hits the PHY, and the timestamp
2648 * of the beacon is defined as "the time that the data
2649 * symbol containing the first bit of the timestamp is
2650 * transmitted to the PHY plus the transmitting STA’s
2651 * delays through its local PHY from the MAC-PHY
2652 * interface to its interface with the WM"
2653 * (802.11 11.1.2) - equals the time this bit arrives at
2654 * the receiver - we have to take into account the
2655 * offset between the two.
2656 * e.g: at 1 MBit that means mactime is 192 usec earlier
2657 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2659 int rate
= local
->hw
.wiphy
->bands
[band
]->
2660 bitrates
[rx_status
->rate_idx
].bitrate
;
2661 rx_timestamp
= rx_status
->mactime
+ (24 * 8 * 10 / rate
);
2662 } else if (local
&& local
->ops
&& local
->ops
->get_tsf
)
2663 /* second best option: get current TSF */
2664 rx_timestamp
= local
->ops
->get_tsf(local_to_hw(local
));
2666 /* can't merge without knowing the TSF */
2667 rx_timestamp
= -1LLU;
2668 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2669 printk(KERN_DEBUG
"RX beacon SA=%s BSSID="
2670 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2671 print_mac(mac
, mgmt
->sa
),
2672 print_mac(mac2
, mgmt
->bssid
),
2673 (unsigned long long)rx_timestamp
,
2674 (unsigned long long)beacon_timestamp
,
2675 (unsigned long long)(rx_timestamp
- beacon_timestamp
),
2677 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2678 if (beacon_timestamp
> rx_timestamp
) {
2679 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2680 printk(KERN_DEBUG
"%s: beacon TSF higher than "
2681 "local TSF - IBSS merge with BSSID %s\n",
2682 sdata
->dev
->name
, print_mac(mac
, mgmt
->bssid
));
2684 ieee80211_sta_join_ibss(sdata
, &sdata
->u
.sta
, bss
);
2685 ieee80211_ibss_add_sta(sdata
, NULL
,
2686 mgmt
->bssid
, mgmt
->sa
,
2691 ieee80211_rx_bss_put(local
, bss
);
2695 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2696 struct ieee80211_mgmt
*mgmt
,
2698 struct ieee80211_rx_status
*rx_status
)
2701 struct ieee802_11_elems elems
;
2702 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2704 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
2705 return; /* ignore ProbeResp to foreign address */
2707 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2711 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2714 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2716 /* direct probe may be part of the association flow */
2717 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
2719 printk(KERN_DEBUG
"%s direct probe responded\n",
2721 ieee80211_authenticate(sdata
, ifsta
);
2726 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2727 struct ieee80211_mgmt
*mgmt
,
2729 struct ieee80211_rx_status
*rx_status
)
2731 struct ieee80211_if_sta
*ifsta
;
2733 struct ieee802_11_elems elems
;
2734 struct ieee80211_local
*local
= sdata
->local
;
2735 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
2738 /* Process beacon from the current BSS */
2739 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2743 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
2745 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2747 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
2749 ifsta
= &sdata
->u
.sta
;
2751 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
) ||
2752 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
2755 /* Do not send changes to driver if we are scanning. This removes
2756 * requirement that a driver's bss_info_changed/conf_tx functions
2757 * need to be atomic.
2758 * This is really ugly code, we should rewrite scanning and make
2759 * all this more understandable for humans.
2761 if (local
->sta_sw_scanning
|| local
->sta_hw_scanning
)
2764 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
2765 elems
.wmm_param_len
);
2767 if (elems
.erp_info
&& elems
.erp_info_len
>= 1)
2768 changed
|= ieee80211_handle_erp_ie(sdata
, elems
.erp_info
[0]);
2770 u16 capab
= le16_to_cpu(mgmt
->u
.beacon
.capab_info
);
2771 changed
|= ieee80211_handle_protect_preamb(sdata
, false,
2772 (capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
) != 0);
2775 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&&
2776 elems
.wmm_param
&& conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
) {
2777 struct ieee80211_ht_bss_info bss_info
;
2779 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2780 (struct ieee80211_ht_addt_info
*)
2781 elems
.ht_info_elem
, &bss_info
);
2782 changed
|= ieee80211_handle_ht(local
, 1, &conf
->ht_conf
,
2786 ieee80211_bss_info_change_notify(sdata
, changed
);
2790 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data
*sdata
,
2791 struct ieee80211_if_sta
*ifsta
,
2792 struct ieee80211_mgmt
*mgmt
,
2794 struct ieee80211_rx_status
*rx_status
)
2796 struct ieee80211_local
*local
= sdata
->local
;
2798 struct sk_buff
*skb
;
2799 struct ieee80211_mgmt
*resp
;
2801 DECLARE_MAC_BUF(mac
);
2802 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2803 DECLARE_MAC_BUF(mac2
);
2804 DECLARE_MAC_BUF(mac3
);
2807 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
||
2808 ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
||
2809 len
< 24 + 2 || !ifsta
->probe_resp
)
2812 if (local
->ops
->tx_last_beacon
)
2813 tx_last_beacon
= local
->ops
->tx_last_beacon(local_to_hw(local
));
2817 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2818 printk(KERN_DEBUG
"%s: RX ProbeReq SA=%s DA=%s BSSID="
2819 "%s (tx_last_beacon=%d)\n",
2820 sdata
->dev
->name
, print_mac(mac
, mgmt
->sa
), print_mac(mac2
, mgmt
->da
),
2821 print_mac(mac3
, mgmt
->bssid
), tx_last_beacon
);
2822 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2824 if (!tx_last_beacon
)
2827 if (memcmp(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
) != 0 &&
2828 memcmp(mgmt
->bssid
, "\xff\xff\xff\xff\xff\xff", ETH_ALEN
) != 0)
2831 end
= ((u8
*) mgmt
) + len
;
2832 pos
= mgmt
->u
.probe_req
.variable
;
2833 if (pos
[0] != WLAN_EID_SSID
||
2834 pos
+ 2 + pos
[1] > end
) {
2835 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2836 printk(KERN_DEBUG
"%s: Invalid SSID IE in ProbeReq "
2838 sdata
->dev
->name
, print_mac(mac
, mgmt
->sa
));
2843 (pos
[1] != ifsta
->ssid_len
||
2844 memcmp(pos
+ 2, ifsta
->ssid
, ifsta
->ssid_len
) != 0)) {
2845 /* Ignore ProbeReq for foreign SSID */
2849 /* Reply with ProbeResp */
2850 skb
= skb_copy(ifsta
->probe_resp
, GFP_KERNEL
);
2854 resp
= (struct ieee80211_mgmt
*) skb
->data
;
2855 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2856 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2857 printk(KERN_DEBUG
"%s: Sending ProbeResp to %s\n",
2858 sdata
->dev
->name
, print_mac(mac
, resp
->da
));
2859 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2860 ieee80211_sta_tx(sdata
, skb
, 0);
2863 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data
*sdata
,
2864 struct ieee80211_if_sta
*ifsta
,
2865 struct ieee80211_mgmt
*mgmt
,
2867 struct ieee80211_rx_status
*rx_status
)
2869 struct ieee80211_local
*local
= sdata
->local
;
2871 /* all categories we currently handle have action_code */
2872 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 1)
2875 switch (mgmt
->u
.action
.category
) {
2876 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2877 if (local
->hw
.conf
.channel
->band
!= IEEE80211_BAND_5GHZ
)
2879 switch (mgmt
->u
.action
.u
.measurement
.action_code
) {
2880 case WLAN_ACTION_SPCT_MSR_REQ
:
2881 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2882 sizeof(mgmt
->u
.action
.u
.measurement
)))
2884 ieee80211_sta_process_measurement_req(sdata
, mgmt
, len
);
2888 case WLAN_CATEGORY_BACK
:
2889 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
2890 case WLAN_ACTION_ADDBA_REQ
:
2891 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2892 sizeof(mgmt
->u
.action
.u
.addba_req
)))
2894 ieee80211_sta_process_addba_request(local
, mgmt
, len
);
2896 case WLAN_ACTION_ADDBA_RESP
:
2897 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2898 sizeof(mgmt
->u
.action
.u
.addba_resp
)))
2900 ieee80211_sta_process_addba_resp(local
, mgmt
, len
);
2902 case WLAN_ACTION_DELBA
:
2903 if (len
< (IEEE80211_MIN_ACTION_SIZE
+
2904 sizeof(mgmt
->u
.action
.u
.delba
)))
2906 ieee80211_sta_process_delba(sdata
, mgmt
, len
);
2910 case PLINK_CATEGORY
:
2911 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2912 mesh_rx_plink_frame(sdata
, mgmt
, len
, rx_status
);
2914 case MESH_PATH_SEL_CATEGORY
:
2915 if (ieee80211_vif_is_mesh(&sdata
->vif
))
2916 mesh_rx_path_sel_frame(sdata
, mgmt
, len
);
2921 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
2922 struct ieee80211_rx_status
*rx_status
)
2924 struct ieee80211_local
*local
= sdata
->local
;
2925 struct ieee80211_if_sta
*ifsta
;
2926 struct ieee80211_mgmt
*mgmt
;
2932 ifsta
= &sdata
->u
.sta
;
2934 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2935 fc
= le16_to_cpu(mgmt
->frame_control
);
2937 switch (fc
& IEEE80211_FCTL_STYPE
) {
2938 case IEEE80211_STYPE_PROBE_REQ
:
2939 case IEEE80211_STYPE_PROBE_RESP
:
2940 case IEEE80211_STYPE_BEACON
:
2941 case IEEE80211_STYPE_ACTION
:
2942 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
2943 case IEEE80211_STYPE_AUTH
:
2944 case IEEE80211_STYPE_ASSOC_RESP
:
2945 case IEEE80211_STYPE_REASSOC_RESP
:
2946 case IEEE80211_STYPE_DEAUTH
:
2947 case IEEE80211_STYPE_DISASSOC
:
2948 skb_queue_tail(&ifsta
->skb_queue
, skb
);
2949 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2957 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2958 struct sk_buff
*skb
)
2960 struct ieee80211_rx_status
*rx_status
;
2961 struct ieee80211_if_sta
*ifsta
;
2962 struct ieee80211_mgmt
*mgmt
;
2965 ifsta
= &sdata
->u
.sta
;
2967 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2968 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2969 fc
= le16_to_cpu(mgmt
->frame_control
);
2971 switch (fc
& IEEE80211_FCTL_STYPE
) {
2972 case IEEE80211_STYPE_PROBE_REQ
:
2973 ieee80211_rx_mgmt_probe_req(sdata
, ifsta
, mgmt
, skb
->len
,
2976 case IEEE80211_STYPE_PROBE_RESP
:
2977 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
, rx_status
);
2979 case IEEE80211_STYPE_BEACON
:
2980 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2982 case IEEE80211_STYPE_AUTH
:
2983 ieee80211_rx_mgmt_auth(sdata
, ifsta
, mgmt
, skb
->len
);
2985 case IEEE80211_STYPE_ASSOC_RESP
:
2986 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 0);
2988 case IEEE80211_STYPE_REASSOC_RESP
:
2989 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 1);
2991 case IEEE80211_STYPE_DEAUTH
:
2992 ieee80211_rx_mgmt_deauth(sdata
, ifsta
, mgmt
, skb
->len
);
2994 case IEEE80211_STYPE_DISASSOC
:
2995 ieee80211_rx_mgmt_disassoc(sdata
, ifsta
, mgmt
, skb
->len
);
2997 case IEEE80211_STYPE_ACTION
:
2998 ieee80211_rx_mgmt_action(sdata
, ifsta
, mgmt
, skb
->len
, rx_status
);
3007 ieee80211_sta_rx_scan(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
3008 struct ieee80211_rx_status
*rx_status
)
3010 struct ieee80211_mgmt
*mgmt
;
3014 return RX_DROP_UNUSABLE
;
3016 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3017 fc
= mgmt
->frame_control
;
3019 if (ieee80211_is_ctl(fc
))
3023 return RX_DROP_MONITOR
;
3025 if (ieee80211_is_probe_resp(fc
)) {
3026 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
, rx_status
);
3031 if (ieee80211_is_beacon(fc
)) {
3032 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3041 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data
*sdata
)
3043 struct ieee80211_local
*local
= sdata
->local
;
3045 struct sta_info
*sta
;
3049 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
3050 if (sta
->sdata
== sdata
&&
3051 time_after(sta
->last_rx
+ IEEE80211_IBSS_MERGE_INTERVAL
,
3064 static void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
, unsigned long exp_time
)
3066 struct ieee80211_local
*local
= sdata
->local
;
3067 struct sta_info
*sta
, *tmp
;
3068 LIST_HEAD(tmp_list
);
3069 DECLARE_MAC_BUF(mac
);
3070 unsigned long flags
;
3072 spin_lock_irqsave(&local
->sta_lock
, flags
);
3073 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
)
3074 if (time_after(jiffies
, sta
->last_rx
+ exp_time
)) {
3075 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3076 printk(KERN_DEBUG
"%s: expiring inactive STA %s\n",
3077 sdata
->dev
->name
, print_mac(mac
, sta
->addr
));
3079 __sta_info_unlink(&sta
);
3081 list_add(&sta
->list
, &tmp_list
);
3083 spin_unlock_irqrestore(&local
->sta_lock
, flags
);
3085 list_for_each_entry_safe(sta
, tmp
, &tmp_list
, list
)
3086 sta_info_destroy(sta
);
3090 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data
*sdata
,
3091 struct ieee80211_if_sta
*ifsta
)
3093 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
3095 ieee80211_sta_expire(sdata
, IEEE80211_IBSS_INACTIVITY_LIMIT
);
3096 if (ieee80211_sta_active_ibss(sdata
))
3099 printk(KERN_DEBUG
"%s: No active IBSS STAs - trying to scan for other "
3100 "IBSS networks with same SSID (merge)\n", sdata
->dev
->name
);
3101 ieee80211_sta_req_scan(sdata
, ifsta
->ssid
, ifsta
->ssid_len
);
3105 #ifdef CONFIG_MAC80211_MESH
3106 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data
*sdata
,
3107 struct ieee80211_if_sta
*ifsta
)
3111 ieee80211_sta_expire(sdata
, IEEE80211_MESH_PEER_INACTIVITY_LIMIT
);
3112 mesh_path_expire(sdata
);
3114 free_plinks
= mesh_plink_availables(sdata
);
3115 if (free_plinks
!= sdata
->u
.sta
.accepting_plinks
)
3116 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
);
3118 mod_timer(&ifsta
->timer
, jiffies
+
3119 IEEE80211_MESH_HOUSEKEEPING_INTERVAL
);
3123 void ieee80211_start_mesh(struct ieee80211_sub_if_data
*sdata
)
3125 struct ieee80211_if_sta
*ifsta
;
3126 ifsta
= &sdata
->u
.sta
;
3127 ifsta
->state
= IEEE80211_STA_MLME_MESH_UP
;
3128 ieee80211_sta_timer((unsigned long)sdata
);
3129 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
);
3134 void ieee80211_sta_timer(unsigned long data
)
3136 struct ieee80211_sub_if_data
*sdata
=
3137 (struct ieee80211_sub_if_data
*) data
;
3138 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3139 struct ieee80211_local
*local
= sdata
->local
;
3141 set_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
3142 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
3145 void ieee80211_sta_work(struct work_struct
*work
)
3147 struct ieee80211_sub_if_data
*sdata
=
3148 container_of(work
, struct ieee80211_sub_if_data
, u
.sta
.work
);
3149 struct ieee80211_local
*local
= sdata
->local
;
3150 struct ieee80211_if_sta
*ifsta
;
3151 struct sk_buff
*skb
;
3153 if (!netif_running(sdata
->dev
))
3156 if (local
->sta_sw_scanning
|| local
->sta_hw_scanning
)
3159 if (WARN_ON(sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
&&
3160 sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
&&
3161 sdata
->vif
.type
!= IEEE80211_IF_TYPE_MESH_POINT
))
3163 ifsta
= &sdata
->u
.sta
;
3165 while ((skb
= skb_dequeue(&ifsta
->skb_queue
)))
3166 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
3168 #ifdef CONFIG_MAC80211_MESH
3169 if (ifsta
->preq_queue_len
&&
3171 ifsta
->last_preq
+ msecs_to_jiffies(ifsta
->mshcfg
.dot11MeshHWMPpreqMinInterval
)))
3172 mesh_path_start_discovery(sdata
);
3175 if (ifsta
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
3176 ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
3177 ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
3178 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
)) {
3179 if (ifsta
->scan_ssid_len
)
3180 ieee80211_sta_start_scan(sdata
, ifsta
->scan_ssid
, ifsta
->scan_ssid_len
);
3182 ieee80211_sta_start_scan(sdata
, NULL
, 0);
3186 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
)) {
3187 if (ieee80211_sta_config_auth(sdata
, ifsta
))
3189 clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
3190 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
))
3193 switch (ifsta
->state
) {
3194 case IEEE80211_STA_MLME_DISABLED
:
3196 case IEEE80211_STA_MLME_DIRECT_PROBE
:
3197 ieee80211_direct_probe(sdata
, ifsta
);
3199 case IEEE80211_STA_MLME_AUTHENTICATE
:
3200 ieee80211_authenticate(sdata
, ifsta
);
3202 case IEEE80211_STA_MLME_ASSOCIATE
:
3203 ieee80211_associate(sdata
, ifsta
);
3205 case IEEE80211_STA_MLME_ASSOCIATED
:
3206 ieee80211_associated(sdata
, ifsta
);
3208 case IEEE80211_STA_MLME_IBSS_SEARCH
:
3209 ieee80211_sta_find_ibss(sdata
, ifsta
);
3211 case IEEE80211_STA_MLME_IBSS_JOINED
:
3212 ieee80211_sta_merge_ibss(sdata
, ifsta
);
3214 #ifdef CONFIG_MAC80211_MESH
3215 case IEEE80211_STA_MLME_MESH_UP
:
3216 ieee80211_mesh_housekeeping(sdata
, ifsta
);
3224 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
3225 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
3226 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
3228 ieee80211_set_disassoc(sdata
, ifsta
, false, true,
3229 WLAN_REASON_UNSPECIFIED
);
3234 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
,
3235 struct ieee80211_if_sta
*ifsta
)
3237 struct ieee80211_local
*local
= sdata
->local
;
3239 if (local
->ops
->reset_tsf
) {
3240 /* Reset own TSF to allow time synchronization work. */
3241 local
->ops
->reset_tsf(local_to_hw(local
));
3244 ifsta
->wmm_last_param_set
= -1; /* allow any WMM update */
3247 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
3248 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
3249 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
3250 ifsta
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
3251 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
3252 ifsta
->auth_alg
= WLAN_AUTH_LEAP
;
3254 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
3255 ifsta
->auth_transaction
= -1;
3256 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
3257 ifsta
->assoc_scan_tries
= 0;
3258 ifsta
->direct_probe_tries
= 0;
3259 ifsta
->auth_tries
= 0;
3260 ifsta
->assoc_tries
= 0;
3261 netif_carrier_off(sdata
->dev
);
3265 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
,
3266 struct ieee80211_if_sta
*ifsta
)
3268 struct ieee80211_local
*local
= sdata
->local
;
3270 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
3273 if ((ifsta
->flags
& (IEEE80211_STA_BSSID_SET
|
3274 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
3275 (ifsta
->flags
& (IEEE80211_STA_SSID_SET
|
3276 IEEE80211_STA_AUTO_SSID_SEL
))) {
3278 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
3279 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
3280 WLAN_REASON_DEAUTH_LEAVING
);
3282 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
3283 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
3287 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta
*ifsta
,
3288 const char *ssid
, int ssid_len
)
3290 int tmp
, hidden_ssid
;
3292 if (ssid_len
== ifsta
->ssid_len
&&
3293 !memcmp(ifsta
->ssid
, ssid
, ssid_len
))
3296 if (ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
3302 if (ssid
[tmp
] != '\0') {
3308 if (hidden_ssid
&& ifsta
->ssid_len
== ssid_len
)
3311 if (ssid_len
== 1 && ssid
[0] == ' ')
3317 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
,
3318 struct ieee80211_if_sta
*ifsta
)
3320 struct ieee80211_local
*local
= sdata
->local
;
3321 struct ieee80211_sta_bss
*bss
, *selected
= NULL
;
3322 int top_rssi
= 0, freq
;
3324 spin_lock_bh(&local
->sta_bss_lock
);
3325 freq
= local
->oper_channel
->center_freq
;
3326 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
3327 if (!(bss
->capability
& WLAN_CAPABILITY_ESS
))
3330 if ((ifsta
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
3331 IEEE80211_STA_AUTO_BSSID_SEL
|
3332 IEEE80211_STA_AUTO_CHANNEL_SEL
)) &&
3333 (!!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
) ^
3334 !!sdata
->default_key
))
3337 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
) &&
3341 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
) &&
3342 memcmp(bss
->bssid
, ifsta
->bssid
, ETH_ALEN
))
3345 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) &&
3346 !ieee80211_sta_match_ssid(ifsta
, bss
->ssid
, bss
->ssid_len
))
3349 if (!selected
|| top_rssi
< bss
->signal
) {
3351 top_rssi
= bss
->signal
;
3355 atomic_inc(&selected
->users
);
3356 spin_unlock_bh(&local
->sta_bss_lock
);
3359 ieee80211_set_freq(sdata
, selected
->freq
);
3360 if (!(ifsta
->flags
& IEEE80211_STA_SSID_SET
))
3361 ieee80211_sta_set_ssid(sdata
, selected
->ssid
,
3362 selected
->ssid_len
);
3363 ieee80211_sta_set_bssid(sdata
, selected
->bssid
);
3364 ieee80211_sta_def_wmm_params(sdata
, selected
, 0);
3366 /* Send out direct probe if no probe resp was received or
3367 * the one we have is outdated
3369 if (!selected
->last_probe_resp
||
3370 time_after(jiffies
, selected
->last_probe_resp
3371 + IEEE80211_SCAN_RESULT_EXPIRE
))
3372 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
3374 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
3376 ieee80211_rx_bss_put(local
, selected
);
3377 ieee80211_sta_reset_auth(sdata
, ifsta
);
3380 if (ifsta
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
3381 ifsta
->assoc_scan_tries
++;
3382 if (ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
3383 ieee80211_sta_start_scan(sdata
, NULL
, 0);
3385 ieee80211_sta_start_scan(sdata
, ifsta
->ssid
,
3387 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
3388 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
3390 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
3396 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data
*sdata
,
3397 struct ieee80211_if_sta
*ifsta
)
3399 struct ieee80211_local
*local
= sdata
->local
;
3400 struct ieee80211_sta_bss
*bss
;
3401 struct ieee80211_supported_band
*sband
;
3402 u8 bssid
[ETH_ALEN
], *pos
;
3405 DECLARE_MAC_BUF(mac
);
3408 /* Easier testing, use fixed BSSID. */
3409 memset(bssid
, 0xfe, ETH_ALEN
);
3411 /* Generate random, not broadcast, locally administered BSSID. Mix in
3412 * own MAC address to make sure that devices that do not have proper
3413 * random number generator get different BSSID. */
3414 get_random_bytes(bssid
, ETH_ALEN
);
3415 for (i
= 0; i
< ETH_ALEN
; i
++)
3416 bssid
[i
] ^= sdata
->dev
->dev_addr
[i
];
3421 printk(KERN_DEBUG
"%s: Creating new IBSS network, BSSID %s\n",
3422 sdata
->dev
->name
, print_mac(mac
, bssid
));
3424 bss
= ieee80211_rx_bss_add(sdata
, bssid
,
3425 local
->hw
.conf
.channel
->center_freq
,
3426 sdata
->u
.sta
.ssid
, sdata
->u
.sta
.ssid_len
);
3430 bss
->band
= local
->hw
.conf
.channel
->band
;
3431 sband
= local
->hw
.wiphy
->bands
[bss
->band
];
3433 if (local
->hw
.conf
.beacon_int
== 0)
3434 local
->hw
.conf
.beacon_int
= 100;
3435 bss
->beacon_int
= local
->hw
.conf
.beacon_int
;
3436 bss
->last_update
= jiffies
;
3437 bss
->capability
= WLAN_CAPABILITY_IBSS
;
3439 if (sdata
->default_key
)
3440 bss
->capability
|= WLAN_CAPABILITY_PRIVACY
;
3442 sdata
->drop_unencrypted
= 0;
3444 bss
->supp_rates_len
= sband
->n_bitrates
;
3445 pos
= bss
->supp_rates
;
3446 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
3447 int rate
= sband
->bitrates
[i
].bitrate
;
3448 *pos
++ = (u8
) (rate
/ 5);
3451 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
3452 ieee80211_rx_bss_put(local
, bss
);
3457 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data
*sdata
,
3458 struct ieee80211_if_sta
*ifsta
)
3460 struct ieee80211_local
*local
= sdata
->local
;
3461 struct ieee80211_sta_bss
*bss
;
3465 DECLARE_MAC_BUF(mac
);
3466 DECLARE_MAC_BUF(mac2
);
3468 if (ifsta
->ssid_len
== 0)
3471 active_ibss
= ieee80211_sta_active_ibss(sdata
);
3472 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3473 printk(KERN_DEBUG
"%s: sta_find_ibss (active_ibss=%d)\n",
3474 sdata
->dev
->name
, active_ibss
);
3475 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3476 spin_lock_bh(&local
->sta_bss_lock
);
3477 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
3478 if (ifsta
->ssid_len
!= bss
->ssid_len
||
3479 memcmp(ifsta
->ssid
, bss
->ssid
, bss
->ssid_len
) != 0
3480 || !(bss
->capability
& WLAN_CAPABILITY_IBSS
))
3482 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3483 printk(KERN_DEBUG
" bssid=%s found\n",
3484 print_mac(mac
, bss
->bssid
));
3485 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3486 memcpy(bssid
, bss
->bssid
, ETH_ALEN
);
3488 if (active_ibss
|| memcmp(bssid
, ifsta
->bssid
, ETH_ALEN
) != 0)
3491 spin_unlock_bh(&local
->sta_bss_lock
);
3493 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3495 printk(KERN_DEBUG
" sta_find_ibss: selected %s current "
3496 "%s\n", print_mac(mac
, bssid
),
3497 print_mac(mac2
, ifsta
->bssid
));
3498 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3500 if (found
&& memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0) {
3504 if (ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
3505 search_freq
= bss
->freq
;
3507 search_freq
= local
->hw
.conf
.channel
->center_freq
;
3509 bss
= ieee80211_rx_bss_get(local
, bssid
, search_freq
,
3510 ifsta
->ssid
, ifsta
->ssid_len
);
3514 printk(KERN_DEBUG
"%s: Selected IBSS BSSID %s"
3515 " based on configured SSID\n",
3516 sdata
->dev
->name
, print_mac(mac
, bssid
));
3517 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
3518 ieee80211_rx_bss_put(local
, bss
);
3523 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3524 printk(KERN_DEBUG
" did not try to join ibss\n");
3525 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3527 /* Selected IBSS not found in current scan results - try to scan */
3528 if (ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
&&
3529 !ieee80211_sta_active_ibss(sdata
)) {
3530 mod_timer(&ifsta
->timer
, jiffies
+
3531 IEEE80211_IBSS_MERGE_INTERVAL
);
3532 } else if (time_after(jiffies
, local
->last_scan_completed
+
3533 IEEE80211_SCAN_INTERVAL
)) {
3534 printk(KERN_DEBUG
"%s: Trigger new scan to find an IBSS to "
3535 "join\n", sdata
->dev
->name
);
3536 return ieee80211_sta_req_scan(sdata
, ifsta
->ssid
,
3538 } else if (ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
) {
3539 int interval
= IEEE80211_SCAN_INTERVAL
;
3541 if (time_after(jiffies
, ifsta
->ibss_join_req
+
3542 IEEE80211_IBSS_JOIN_TIMEOUT
)) {
3543 if ((ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) &&
3544 (!(local
->oper_channel
->flags
&
3545 IEEE80211_CHAN_NO_IBSS
)))
3546 return ieee80211_sta_create_ibss(sdata
, ifsta
);
3547 if (ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) {
3548 printk(KERN_DEBUG
"%s: IBSS not allowed on"
3549 " %d MHz\n", sdata
->dev
->name
,
3550 local
->hw
.conf
.channel
->center_freq
);
3553 /* No IBSS found - decrease scan interval and continue
3555 interval
= IEEE80211_SCAN_INTERVAL_SLOW
;
3558 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
3559 mod_timer(&ifsta
->timer
, jiffies
+ interval
);
3567 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
3569 struct ieee80211_if_sta
*ifsta
;
3572 if (len
> IEEE80211_MAX_SSID_LEN
)
3575 ifsta
= &sdata
->u
.sta
;
3577 if (ifsta
->ssid_len
!= len
|| memcmp(ifsta
->ssid
, ssid
, len
) != 0) {
3578 memset(ifsta
->ssid
, 0, sizeof(ifsta
->ssid
));
3579 memcpy(ifsta
->ssid
, ssid
, len
);
3580 ifsta
->ssid_len
= len
;
3581 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
3585 * Hack! MLME code needs to be cleaned up to have different
3586 * entry points for configuration and internal selection change
3588 if (netif_running(sdata
->dev
))
3589 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_SSID
);
3591 printk(KERN_DEBUG
"%s: Failed to config new SSID to "
3592 "the low-level driver\n", sdata
->dev
->name
);
3598 ifsta
->flags
|= IEEE80211_STA_SSID_SET
;
3600 ifsta
->flags
&= ~IEEE80211_STA_SSID_SET
;
3602 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
3603 !(ifsta
->flags
& IEEE80211_STA_BSSID_SET
)) {
3604 ifsta
->ibss_join_req
= jiffies
;
3605 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
3606 return ieee80211_sta_find_ibss(sdata
, ifsta
);
3613 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
3615 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3616 memcpy(ssid
, ifsta
->ssid
, ifsta
->ssid_len
);
3617 *len
= ifsta
->ssid_len
;
3622 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
3624 struct ieee80211_if_sta
*ifsta
;
3627 ifsta
= &sdata
->u
.sta
;
3629 if (memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0) {
3630 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
3633 * Hack! See also ieee80211_sta_set_ssid.
3635 if (netif_running(sdata
->dev
))
3636 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
3638 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
3639 "the low-level driver\n", sdata
->dev
->name
);
3644 if (is_valid_ether_addr(bssid
))
3645 ifsta
->flags
|= IEEE80211_STA_BSSID_SET
;
3647 ifsta
->flags
&= ~IEEE80211_STA_BSSID_SET
;
3653 static void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
3654 struct ieee80211_sub_if_data
*sdata
,
3657 struct sk_buff
*skb
;
3658 struct ieee80211_hdr
*nullfunc
;
3661 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
3663 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
3664 "frame\n", sdata
->dev
->name
);
3667 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
3669 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
3670 memset(nullfunc
, 0, 24);
3671 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
3672 IEEE80211_FCTL_TODS
);
3674 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
3675 nullfunc
->frame_control
= fc
;
3676 memcpy(nullfunc
->addr1
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
3677 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
3678 memcpy(nullfunc
->addr3
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
3680 ieee80211_sta_tx(sdata
, skb
, 0);
3684 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3686 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
3687 ieee80211_vif_is_mesh(&sdata
->vif
))
3688 ieee80211_sta_timer((unsigned long)sdata
);
3691 void ieee80211_scan_completed(struct ieee80211_hw
*hw
)
3693 struct ieee80211_local
*local
= hw_to_local(hw
);
3694 struct net_device
*dev
= local
->scan_dev
;
3695 struct ieee80211_sub_if_data
*sdata
;
3696 union iwreq_data wrqu
;
3698 local
->last_scan_completed
= jiffies
;
3699 memset(&wrqu
, 0, sizeof(wrqu
));
3700 wireless_send_event(dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
3702 if (local
->sta_hw_scanning
) {
3703 local
->sta_hw_scanning
= 0;
3704 if (ieee80211_hw_config(local
))
3705 printk(KERN_DEBUG
"%s: failed to restore operational "
3706 "channel after scan\n", dev
->name
);
3707 /* Restart STA timer for HW scan case */
3709 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3710 ieee80211_restart_sta_timer(sdata
);
3716 local
->sta_sw_scanning
= 0;
3717 if (ieee80211_hw_config(local
))
3718 printk(KERN_DEBUG
"%s: failed to restore operational "
3719 "channel after scan\n", dev
->name
);
3722 netif_tx_lock_bh(local
->mdev
);
3723 netif_addr_lock(local
->mdev
);
3724 local
->filter_flags
&= ~FIF_BCN_PRBRESP_PROMISC
;
3725 local
->ops
->configure_filter(local_to_hw(local
),
3726 FIF_BCN_PRBRESP_PROMISC
,
3727 &local
->filter_flags
,
3728 local
->mdev
->mc_count
,
3729 local
->mdev
->mc_list
);
3731 netif_addr_unlock(local
->mdev
);
3732 netif_tx_unlock_bh(local
->mdev
);
3735 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3736 /* Tell AP we're back */
3737 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
3738 sdata
->u
.sta
.flags
& IEEE80211_STA_ASSOCIATED
)
3739 ieee80211_send_nullfunc(local
, sdata
, 0);
3741 ieee80211_restart_sta_timer(sdata
);
3743 netif_wake_queue(sdata
->dev
);
3748 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3749 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
3750 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3751 if (!(ifsta
->flags
& IEEE80211_STA_BSSID_SET
) ||
3752 (!(ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
) &&
3753 !ieee80211_sta_active_ibss(sdata
)))
3754 ieee80211_sta_find_ibss(sdata
, ifsta
);
3757 EXPORT_SYMBOL(ieee80211_scan_completed
);
3759 void ieee80211_sta_scan_work(struct work_struct
*work
)
3761 struct ieee80211_local
*local
=
3762 container_of(work
, struct ieee80211_local
, scan_work
.work
);
3763 struct net_device
*dev
= local
->scan_dev
;
3764 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3765 struct ieee80211_supported_band
*sband
;
3766 struct ieee80211_channel
*chan
;
3768 unsigned long next_delay
= 0;
3770 if (!local
->sta_sw_scanning
)
3773 switch (local
->scan_state
) {
3774 case SCAN_SET_CHANNEL
:
3776 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3777 * after we successfully scanned the last channel of the last
3778 * band (and the last band is supported by the hw)
3780 if (local
->scan_band
< IEEE80211_NUM_BANDS
)
3781 sband
= local
->hw
.wiphy
->bands
[local
->scan_band
];
3786 * If we are at an unsupported band and have more bands
3787 * left to scan, advance to the next supported one.
3789 while (!sband
&& local
->scan_band
< IEEE80211_NUM_BANDS
- 1) {
3791 sband
= local
->hw
.wiphy
->bands
[local
->scan_band
];
3792 local
->scan_channel_idx
= 0;
3795 /* if no more bands/channels left, complete scan */
3796 if (!sband
|| local
->scan_channel_idx
>= sband
->n_channels
) {
3797 ieee80211_scan_completed(local_to_hw(local
));
3801 chan
= &sband
->channels
[local
->scan_channel_idx
];
3803 if (chan
->flags
& IEEE80211_CHAN_DISABLED
||
3804 (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
3805 chan
->flags
& IEEE80211_CHAN_NO_IBSS
))
3809 local
->scan_channel
= chan
;
3810 if (ieee80211_hw_config(local
)) {
3811 printk(KERN_DEBUG
"%s: failed to set freq to "
3812 "%d MHz for scan\n", dev
->name
,
3818 /* advance state machine to next channel/band */
3819 local
->scan_channel_idx
++;
3820 if (local
->scan_channel_idx
>= sband
->n_channels
) {
3822 * scan_band may end up == IEEE80211_NUM_BANDS, but
3823 * we'll catch that case above and complete the scan
3824 * if that is the case.
3827 local
->scan_channel_idx
= 0;
3833 next_delay
= IEEE80211_PROBE_DELAY
+
3834 usecs_to_jiffies(local
->hw
.channel_change_time
);
3835 local
->scan_state
= SCAN_SEND_PROBE
;
3837 case SCAN_SEND_PROBE
:
3838 next_delay
= IEEE80211_PASSIVE_CHANNEL_TIME
;
3839 local
->scan_state
= SCAN_SET_CHANNEL
;
3841 if (local
->scan_channel
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
)
3843 ieee80211_send_probe_req(sdata
, NULL
, local
->scan_ssid
,
3844 local
->scan_ssid_len
);
3845 next_delay
= IEEE80211_CHANNEL_TIME
;
3849 if (local
->sta_sw_scanning
)
3850 queue_delayed_work(local
->hw
.workqueue
, &local
->scan_work
,
3855 static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data
*scan_sdata
,
3856 u8
*ssid
, size_t ssid_len
)
3858 struct ieee80211_local
*local
= scan_sdata
->local
;
3859 struct ieee80211_sub_if_data
*sdata
;
3861 if (ssid_len
> IEEE80211_MAX_SSID_LEN
)
3864 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3865 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3868 * ScanType: ACTIVE, PASSIVE
3869 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3870 * a Probe frame during active scanning
3872 * MinChannelTime (>= ProbeDelay), in TU
3873 * MaxChannelTime: (>= MinChannelTime), in TU
3876 /* MLME-SCAN.confirm
3878 * ResultCode: SUCCESS, INVALID_PARAMETERS
3881 if (local
->sta_sw_scanning
|| local
->sta_hw_scanning
) {
3882 if (local
->scan_dev
== scan_sdata
->dev
)
3887 if (local
->ops
->hw_scan
) {
3888 int rc
= local
->ops
->hw_scan(local_to_hw(local
),
3891 local
->sta_hw_scanning
= 1;
3892 local
->scan_dev
= scan_sdata
->dev
;
3897 local
->sta_sw_scanning
= 1;
3900 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3901 netif_stop_queue(sdata
->dev
);
3902 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
3903 (sdata
->u
.sta
.flags
& IEEE80211_STA_ASSOCIATED
))
3904 ieee80211_send_nullfunc(local
, sdata
, 1);
3909 local
->scan_ssid_len
= ssid_len
;
3910 memcpy(local
->scan_ssid
, ssid
, ssid_len
);
3912 local
->scan_ssid_len
= 0;
3913 local
->scan_state
= SCAN_SET_CHANNEL
;
3914 local
->scan_channel_idx
= 0;
3915 local
->scan_band
= IEEE80211_BAND_2GHZ
;
3916 local
->scan_dev
= scan_sdata
->dev
;
3918 netif_addr_lock_bh(local
->mdev
);
3919 local
->filter_flags
|= FIF_BCN_PRBRESP_PROMISC
;
3920 local
->ops
->configure_filter(local_to_hw(local
),
3921 FIF_BCN_PRBRESP_PROMISC
,
3922 &local
->filter_flags
,
3923 local
->mdev
->mc_count
,
3924 local
->mdev
->mc_list
);
3925 netif_addr_unlock_bh(local
->mdev
);
3927 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3928 queue_delayed_work(local
->hw
.workqueue
, &local
->scan_work
,
3929 IEEE80211_CHANNEL_TIME
);
3935 int ieee80211_sta_req_scan(struct ieee80211_sub_if_data
*sdata
, u8
*ssid
, size_t ssid_len
)
3937 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3938 struct ieee80211_local
*local
= sdata
->local
;
3940 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
3941 return ieee80211_sta_start_scan(sdata
, ssid
, ssid_len
);
3943 if (local
->sta_sw_scanning
|| local
->sta_hw_scanning
) {
3944 if (local
->scan_dev
== sdata
->dev
)
3949 ifsta
->scan_ssid_len
= ssid_len
;
3951 memcpy(ifsta
->scan_ssid
, ssid
, ssid_len
);
3952 set_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
);
3953 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
3958 static void ieee80211_sta_add_scan_ies(struct iw_request_info
*info
,
3959 struct ieee80211_sta_bss
*bss
,
3960 char **current_ev
, char *end_buf
)
3962 u8
*pos
, *end
, *next
;
3963 struct iw_event iwe
;
3965 if (bss
== NULL
|| bss
->ies
== NULL
)
3969 * If needed, fragment the IEs buffer (at IE boundaries) into short
3970 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
3973 end
= pos
+ bss
->ies_len
;
3975 while (end
- pos
> IW_GENERIC_IE_MAX
) {
3976 next
= pos
+ 2 + pos
[1];
3977 while (next
+ 2 + next
[1] - pos
< IW_GENERIC_IE_MAX
)
3978 next
= next
+ 2 + next
[1];
3980 memset(&iwe
, 0, sizeof(iwe
));
3981 iwe
.cmd
= IWEVGENIE
;
3982 iwe
.u
.data
.length
= next
- pos
;
3983 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
3984 end_buf
, &iwe
, pos
);
3990 memset(&iwe
, 0, sizeof(iwe
));
3991 iwe
.cmd
= IWEVGENIE
;
3992 iwe
.u
.data
.length
= end
- pos
;
3993 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
3994 end_buf
, &iwe
, pos
);
4000 ieee80211_sta_scan_result(struct ieee80211_local
*local
,
4001 struct iw_request_info
*info
,
4002 struct ieee80211_sta_bss
*bss
,
4003 char *current_ev
, char *end_buf
)
4005 struct iw_event iwe
;
4007 if (time_after(jiffies
,
4008 bss
->last_update
+ IEEE80211_SCAN_RESULT_EXPIRE
))
4011 memset(&iwe
, 0, sizeof(iwe
));
4012 iwe
.cmd
= SIOCGIWAP
;
4013 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
4014 memcpy(iwe
.u
.ap_addr
.sa_data
, bss
->bssid
, ETH_ALEN
);
4015 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
4018 memset(&iwe
, 0, sizeof(iwe
));
4019 iwe
.cmd
= SIOCGIWESSID
;
4020 if (bss_mesh_cfg(bss
)) {
4021 iwe
.u
.data
.length
= bss_mesh_id_len(bss
);
4022 iwe
.u
.data
.flags
= 1;
4023 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
4024 &iwe
, bss_mesh_id(bss
));
4026 iwe
.u
.data
.length
= bss
->ssid_len
;
4027 iwe
.u
.data
.flags
= 1;
4028 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
4032 if (bss
->capability
& (WLAN_CAPABILITY_ESS
| WLAN_CAPABILITY_IBSS
)
4033 || bss_mesh_cfg(bss
)) {
4034 memset(&iwe
, 0, sizeof(iwe
));
4035 iwe
.cmd
= SIOCGIWMODE
;
4036 if (bss_mesh_cfg(bss
))
4037 iwe
.u
.mode
= IW_MODE_MESH
;
4038 else if (bss
->capability
& WLAN_CAPABILITY_ESS
)
4039 iwe
.u
.mode
= IW_MODE_MASTER
;
4041 iwe
.u
.mode
= IW_MODE_ADHOC
;
4042 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
4043 &iwe
, IW_EV_UINT_LEN
);
4046 memset(&iwe
, 0, sizeof(iwe
));
4047 iwe
.cmd
= SIOCGIWFREQ
;
4048 iwe
.u
.freq
.m
= ieee80211_frequency_to_channel(bss
->freq
);
4050 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
4053 memset(&iwe
, 0, sizeof(iwe
));
4054 iwe
.cmd
= SIOCGIWFREQ
;
4055 iwe
.u
.freq
.m
= bss
->freq
;
4057 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
4059 memset(&iwe
, 0, sizeof(iwe
));
4061 iwe
.u
.qual
.qual
= bss
->qual
;
4062 iwe
.u
.qual
.level
= bss
->signal
;
4063 iwe
.u
.qual
.noise
= bss
->noise
;
4064 iwe
.u
.qual
.updated
= local
->wstats_flags
;
4065 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
4068 memset(&iwe
, 0, sizeof(iwe
));
4069 iwe
.cmd
= SIOCGIWENCODE
;
4070 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
4071 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
4073 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
4074 iwe
.u
.data
.length
= 0;
4075 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
4078 ieee80211_sta_add_scan_ies(info
, bss
, ¤t_ev
, end_buf
);
4080 if (bss
&& bss
->supp_rates_len
> 0) {
4081 /* display all supported rates in readable format */
4082 char *p
= current_ev
+ iwe_stream_lcp_len(info
);
4085 memset(&iwe
, 0, sizeof(iwe
));
4086 iwe
.cmd
= SIOCGIWRATE
;
4087 /* Those two flags are ignored... */
4088 iwe
.u
.bitrate
.fixed
= iwe
.u
.bitrate
.disabled
= 0;
4090 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
4091 iwe
.u
.bitrate
.value
= ((bss
->supp_rates
[i
] &
4093 p
= iwe_stream_add_value(info
, current_ev
, p
,
4094 end_buf
, &iwe
, IW_EV_PARAM_LEN
);
4101 buf
= kmalloc(30, GFP_ATOMIC
);
4103 memset(&iwe
, 0, sizeof(iwe
));
4104 iwe
.cmd
= IWEVCUSTOM
;
4105 sprintf(buf
, "tsf=%016llx", (unsigned long long)(bss
->timestamp
));
4106 iwe
.u
.data
.length
= strlen(buf
);
4107 current_ev
= iwe_stream_add_point(info
, current_ev
,
4110 memset(&iwe
, 0, sizeof(iwe
));
4111 iwe
.cmd
= IWEVCUSTOM
;
4112 sprintf(buf
, " Last beacon: %dms ago",
4113 jiffies_to_msecs(jiffies
- bss
->last_update
));
4114 iwe
.u
.data
.length
= strlen(buf
);
4115 current_ev
= iwe_stream_add_point(info
, current_ev
,
4116 end_buf
, &iwe
, buf
);
4121 if (bss_mesh_cfg(bss
)) {
4123 u8
*cfg
= bss_mesh_cfg(bss
);
4124 buf
= kmalloc(50, GFP_ATOMIC
);
4126 memset(&iwe
, 0, sizeof(iwe
));
4127 iwe
.cmd
= IWEVCUSTOM
;
4128 sprintf(buf
, "Mesh network (version %d)", cfg
[0]);
4129 iwe
.u
.data
.length
= strlen(buf
);
4130 current_ev
= iwe_stream_add_point(info
, current_ev
,
4133 sprintf(buf
, "Path Selection Protocol ID: "
4134 "0x%02X%02X%02X%02X", cfg
[1], cfg
[2], cfg
[3],
4136 iwe
.u
.data
.length
= strlen(buf
);
4137 current_ev
= iwe_stream_add_point(info
, current_ev
,
4140 sprintf(buf
, "Path Selection Metric ID: "
4141 "0x%02X%02X%02X%02X", cfg
[5], cfg
[6], cfg
[7],
4143 iwe
.u
.data
.length
= strlen(buf
);
4144 current_ev
= iwe_stream_add_point(info
, current_ev
,
4147 sprintf(buf
, "Congestion Control Mode ID: "
4148 "0x%02X%02X%02X%02X", cfg
[9], cfg
[10],
4150 iwe
.u
.data
.length
= strlen(buf
);
4151 current_ev
= iwe_stream_add_point(info
, current_ev
,
4154 sprintf(buf
, "Channel Precedence: "
4155 "0x%02X%02X%02X%02X", cfg
[13], cfg
[14],
4157 iwe
.u
.data
.length
= strlen(buf
);
4158 current_ev
= iwe_stream_add_point(info
, current_ev
,
4169 int ieee80211_sta_scan_results(struct ieee80211_local
*local
,
4170 struct iw_request_info
*info
,
4171 char *buf
, size_t len
)
4173 char *current_ev
= buf
;
4174 char *end_buf
= buf
+ len
;
4175 struct ieee80211_sta_bss
*bss
;
4177 spin_lock_bh(&local
->sta_bss_lock
);
4178 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
4179 if (buf
+ len
- current_ev
<= IW_EV_ADDR_LEN
) {
4180 spin_unlock_bh(&local
->sta_bss_lock
);
4183 current_ev
= ieee80211_sta_scan_result(local
, info
, bss
,
4184 current_ev
, end_buf
);
4186 spin_unlock_bh(&local
->sta_bss_lock
);
4187 return current_ev
- buf
;
4191 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
, char *ie
, size_t len
)
4193 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
4195 kfree(ifsta
->extra_ie
);
4197 ifsta
->extra_ie
= NULL
;
4198 ifsta
->extra_ie_len
= 0;
4201 ifsta
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
4202 if (!ifsta
->extra_ie
) {
4203 ifsta
->extra_ie_len
= 0;
4206 memcpy(ifsta
->extra_ie
, ie
, len
);
4207 ifsta
->extra_ie_len
= len
;
4212 struct sta_info
*ieee80211_ibss_add_sta(struct ieee80211_sub_if_data
*sdata
,
4213 struct sk_buff
*skb
, u8
*bssid
,
4214 u8
*addr
, u64 supp_rates
)
4216 struct ieee80211_local
*local
= sdata
->local
;
4217 struct sta_info
*sta
;
4218 DECLARE_MAC_BUF(mac
);
4219 int band
= local
->hw
.conf
.channel
->band
;
4221 /* TODO: Could consider removing the least recently used entry and
4222 * allow new one to be added. */
4223 if (local
->num_sta
>= IEEE80211_IBSS_MAX_STA_ENTRIES
) {
4224 if (net_ratelimit()) {
4225 printk(KERN_DEBUG
"%s: No room for a new IBSS STA "
4226 "entry %s\n", sdata
->dev
->name
, print_mac(mac
, addr
));
4231 if (compare_ether_addr(bssid
, sdata
->u
.sta
.bssid
))
4234 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4235 printk(KERN_DEBUG
"%s: Adding new IBSS station %s (dev=%s)\n",
4236 wiphy_name(local
->hw
.wiphy
), print_mac(mac
, addr
), sdata
->dev
->name
);
4239 sta
= sta_info_alloc(sdata
, addr
, GFP_ATOMIC
);
4243 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
4245 /* make sure mandatory rates are always added */
4246 sta
->supp_rates
[band
] = supp_rates
|
4247 ieee80211_sta_get_mandatory_rates(local
, band
);
4249 rate_control_rate_init(sta
, local
);
4251 if (sta_info_insert(sta
))
4258 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
4260 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
4262 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
4263 sdata
->dev
->name
, reason
);
4265 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
&&
4266 sdata
->vif
.type
!= IEEE80211_IF_TYPE_IBSS
)
4269 ieee80211_set_disassoc(sdata
, ifsta
, true, true, reason
);
4274 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
4276 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
4278 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
4279 sdata
->dev
->name
, reason
);
4281 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
4284 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
))
4287 ieee80211_set_disassoc(sdata
, ifsta
, false, true, reason
);
4291 void ieee80211_notify_mac(struct ieee80211_hw
*hw
,
4292 enum ieee80211_notification_types notif_type
)
4294 struct ieee80211_local
*local
= hw_to_local(hw
);
4295 struct ieee80211_sub_if_data
*sdata
;
4297 switch (notif_type
) {
4298 case IEEE80211_NOTIFY_RE_ASSOC
:
4300 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4301 if (sdata
->vif
.type
!= IEEE80211_IF_TYPE_STA
)
4304 ieee80211_sta_req_auth(sdata
, &sdata
->u
.sta
);
4310 EXPORT_SYMBOL(ieee80211_notify_mac
);