2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
7 * This file is to be included into hostap.c when S/W AP functionality is
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
23 #include "hostap_wlan.h"
25 #include "hostap_ap.h"
27 static int other_ap_policy
[MAX_PARM_DEVICES
] = { AP_OTHER_AP_SKIP_ALL
,
29 module_param_array(other_ap_policy
, int, NULL
, 0444);
30 MODULE_PARM_DESC(other_ap_policy
, "Other AP beacon monitoring policy (0-3)");
32 static int ap_max_inactivity
[MAX_PARM_DEVICES
] = { AP_MAX_INACTIVITY_SEC
,
34 module_param_array(ap_max_inactivity
, int, NULL
, 0444);
35 MODULE_PARM_DESC(ap_max_inactivity
, "AP timeout (in seconds) for station "
38 static int ap_bridge_packets
[MAX_PARM_DEVICES
] = { 1, DEF_INTS
};
39 module_param_array(ap_bridge_packets
, int, NULL
, 0444);
40 MODULE_PARM_DESC(ap_bridge_packets
, "Bridge packets directly between "
43 static int autom_ap_wds
[MAX_PARM_DEVICES
] = { 0, DEF_INTS
};
44 module_param_array(autom_ap_wds
, int, NULL
, 0444);
45 MODULE_PARM_DESC(autom_ap_wds
, "Add WDS connections to other APs "
49 static struct sta_info
* ap_get_sta(struct ap_data
*ap
, u8
*sta
);
50 static void hostap_event_expired_sta(struct net_device
*dev
,
51 struct sta_info
*sta
);
52 static void handle_add_proc_queue(struct work_struct
*work
);
54 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
55 static void handle_wds_oper_queue(struct work_struct
*work
);
56 static void prism2_send_mgmt(struct net_device
*dev
,
57 u16 type_subtype
, char *body
,
58 int body_len
, u8
*addr
, u16 tx_cb_idx
);
59 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
62 #ifndef PRISM2_NO_PROCFS_DEBUG
63 static int ap_debug_proc_read(char *page
, char **start
, off_t off
,
64 int count
, int *eof
, void *data
)
67 struct ap_data
*ap
= (struct ap_data
*) data
;
74 p
+= sprintf(p
, "BridgedUnicastFrames=%u\n", ap
->bridged_unicast
);
75 p
+= sprintf(p
, "BridgedMulticastFrames=%u\n", ap
->bridged_multicast
);
76 p
+= sprintf(p
, "max_inactivity=%u\n", ap
->max_inactivity
/ HZ
);
77 p
+= sprintf(p
, "bridge_packets=%u\n", ap
->bridge_packets
);
78 p
+= sprintf(p
, "nullfunc_ack=%u\n", ap
->nullfunc_ack
);
79 p
+= sprintf(p
, "autom_ap_wds=%u\n", ap
->autom_ap_wds
);
80 p
+= sprintf(p
, "auth_algs=%u\n", ap
->local
->auth_algs
);
81 p
+= sprintf(p
, "tx_drop_nonassoc=%u\n", ap
->tx_drop_nonassoc
);
85 #endif /* PRISM2_NO_PROCFS_DEBUG */
88 static void ap_sta_hash_add(struct ap_data
*ap
, struct sta_info
*sta
)
90 sta
->hnext
= ap
->sta_hash
[STA_HASH(sta
->addr
)];
91 ap
->sta_hash
[STA_HASH(sta
->addr
)] = sta
;
94 static void ap_sta_hash_del(struct ap_data
*ap
, struct sta_info
*sta
)
98 s
= ap
->sta_hash
[STA_HASH(sta
->addr
)];
99 if (s
== NULL
) return;
100 if (memcmp(s
->addr
, sta
->addr
, ETH_ALEN
) == 0) {
101 ap
->sta_hash
[STA_HASH(sta
->addr
)] = s
->hnext
;
105 while (s
->hnext
!= NULL
&& memcmp(s
->hnext
->addr
, sta
->addr
, ETH_ALEN
)
108 if (s
->hnext
!= NULL
)
109 s
->hnext
= s
->hnext
->hnext
;
111 printk("AP: could not remove STA " MACSTR
" from hash table\n",
115 static void ap_free_sta(struct ap_data
*ap
, struct sta_info
*sta
)
117 if (sta
->ap
&& sta
->local
)
118 hostap_event_expired_sta(sta
->local
->dev
, sta
);
120 if (ap
->proc
!= NULL
) {
122 sprintf(name
, MACSTR
, MAC2STR(sta
->addr
));
123 remove_proc_entry(name
, ap
->proc
);
127 sta
->crypt
->ops
->deinit(sta
->crypt
->priv
);
132 skb_queue_purge(&sta
->tx_buf
);
135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
137 ap
->sta_aid
[sta
->aid
- 1] = NULL
;
139 if (!sta
->ap
&& sta
->u
.sta
.challenge
)
140 kfree(sta
->u
.sta
.challenge
);
141 del_timer(&sta
->timer
);
142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
148 static void hostap_set_tim(local_info_t
*local
, int aid
, int set
)
150 if (local
->func
->set_tim
)
151 local
->func
->set_tim(local
->dev
, aid
, set
);
155 static void hostap_event_new_sta(struct net_device
*dev
, struct sta_info
*sta
)
157 union iwreq_data wrqu
;
158 memset(&wrqu
, 0, sizeof(wrqu
));
159 memcpy(wrqu
.addr
.sa_data
, sta
->addr
, ETH_ALEN
);
160 wrqu
.addr
.sa_family
= ARPHRD_ETHER
;
161 wireless_send_event(dev
, IWEVREGISTERED
, &wrqu
, NULL
);
165 static void hostap_event_expired_sta(struct net_device
*dev
,
166 struct sta_info
*sta
)
168 union iwreq_data wrqu
;
169 memset(&wrqu
, 0, sizeof(wrqu
));
170 memcpy(wrqu
.addr
.sa_data
, sta
->addr
, ETH_ALEN
);
171 wrqu
.addr
.sa_family
= ARPHRD_ETHER
;
172 wireless_send_event(dev
, IWEVEXPIRED
, &wrqu
, NULL
);
176 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
178 static void ap_handle_timer(unsigned long data
)
180 struct sta_info
*sta
= (struct sta_info
*) data
;
183 unsigned long next_time
= 0;
186 if (sta
== NULL
|| sta
->local
== NULL
|| sta
->local
->ap
== NULL
) {
187 PDEBUG(DEBUG_AP
, "ap_handle_timer() called with NULL data\n");
193 was_assoc
= sta
->flags
& WLAN_STA_ASSOC
;
195 if (atomic_read(&sta
->users
) != 0)
196 next_time
= jiffies
+ HZ
;
197 else if ((sta
->flags
& WLAN_STA_PERM
) && !(sta
->flags
& WLAN_STA_AUTH
))
198 next_time
= jiffies
+ ap
->max_inactivity
;
200 if (time_before(jiffies
, sta
->last_rx
+ ap
->max_inactivity
)) {
201 /* station activity detected; reset timeout state */
202 sta
->timeout_next
= STA_NULLFUNC
;
203 next_time
= sta
->last_rx
+ ap
->max_inactivity
;
204 } else if (sta
->timeout_next
== STA_DISASSOC
&&
205 !(sta
->flags
& WLAN_STA_PENDING_POLL
)) {
206 /* STA ACKed data nullfunc frame poll */
207 sta
->timeout_next
= STA_NULLFUNC
;
208 next_time
= jiffies
+ ap
->max_inactivity
;
212 sta
->timer
.expires
= next_time
;
213 add_timer(&sta
->timer
);
218 sta
->timeout_next
= STA_DEAUTH
;
220 if (sta
->timeout_next
== STA_DEAUTH
&& !(sta
->flags
& WLAN_STA_PERM
)) {
221 spin_lock(&ap
->sta_table_lock
);
222 ap_sta_hash_del(ap
, sta
);
223 list_del(&sta
->list
);
224 spin_unlock(&ap
->sta_table_lock
);
225 sta
->flags
&= ~(WLAN_STA_AUTH
| WLAN_STA_ASSOC
);
226 } else if (sta
->timeout_next
== STA_DISASSOC
)
227 sta
->flags
&= ~WLAN_STA_ASSOC
;
229 if (was_assoc
&& !(sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
)
230 hostap_event_expired_sta(local
->dev
, sta
);
232 if (sta
->timeout_next
== STA_DEAUTH
&& sta
->aid
> 0 &&
233 !skb_queue_empty(&sta
->tx_buf
)) {
234 hostap_set_tim(local
, sta
->aid
, 0);
235 sta
->flags
&= ~WLAN_STA_TIM
;
239 if (ap
->autom_ap_wds
) {
240 PDEBUG(DEBUG_AP
, "%s: removing automatic WDS "
241 "connection to AP " MACSTR
"\n",
242 local
->dev
->name
, MAC2STR(sta
->addr
));
243 hostap_wds_link_oper(local
, sta
->addr
, WDS_DEL
);
245 } else if (sta
->timeout_next
== STA_NULLFUNC
) {
246 /* send data frame to poll STA and check whether this frame
248 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
249 * it is apparently not retried so TX Exc events are not
251 sta
->flags
|= WLAN_STA_PENDING_POLL
;
252 prism2_send_mgmt(local
->dev
, IEEE80211_FTYPE_DATA
|
253 IEEE80211_STYPE_DATA
, NULL
, 0,
254 sta
->addr
, ap
->tx_callback_poll
);
256 int deauth
= sta
->timeout_next
== STA_DEAUTH
;
258 PDEBUG(DEBUG_AP
, "%s: sending %s info to STA " MACSTR
259 "(last=%lu, jiffies=%lu)\n",
261 deauth
? "deauthentication" : "disassociation",
262 MAC2STR(sta
->addr
), sta
->last_rx
, jiffies
);
264 resp
= cpu_to_le16(deauth
? WLAN_REASON_PREV_AUTH_NOT_VALID
:
265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
266 prism2_send_mgmt(local
->dev
, IEEE80211_FTYPE_MGMT
|
267 (deauth
? IEEE80211_STYPE_DEAUTH
:
268 IEEE80211_STYPE_DISASSOC
),
269 (char *) &resp
, 2, sta
->addr
, 0);
272 if (sta
->timeout_next
== STA_DEAUTH
) {
273 if (sta
->flags
& WLAN_STA_PERM
) {
274 PDEBUG(DEBUG_AP
, "%s: STA " MACSTR
" would have been "
275 "removed, but it has 'perm' flag\n",
276 local
->dev
->name
, MAC2STR(sta
->addr
));
278 ap_free_sta(ap
, sta
);
282 if (sta
->timeout_next
== STA_NULLFUNC
) {
283 sta
->timeout_next
= STA_DISASSOC
;
284 sta
->timer
.expires
= jiffies
+ AP_DISASSOC_DELAY
;
286 sta
->timeout_next
= STA_DEAUTH
;
287 sta
->timer
.expires
= jiffies
+ AP_DEAUTH_DELAY
;
290 add_timer(&sta
->timer
);
294 void hostap_deauth_all_stas(struct net_device
*dev
, struct ap_data
*ap
,
301 PDEBUG(DEBUG_AP
, "%s: Deauthenticate all stations\n", dev
->name
);
302 memset(addr
, 0xff, ETH_ALEN
);
304 resp
= __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID
);
306 /* deauth message sent; try to resend it few times; the message is
307 * broadcast, so it may be delayed until next DTIM; there is not much
308 * else we can do at this point since the driver is going to be shut
310 for (i
= 0; i
< 5; i
++) {
311 prism2_send_mgmt(dev
, IEEE80211_FTYPE_MGMT
|
312 IEEE80211_STYPE_DEAUTH
,
313 (char *) &resp
, 2, addr
, 0);
315 if (!resend
|| ap
->num_sta
<= 0)
323 static int ap_control_proc_read(char *page
, char **start
, off_t off
,
324 int count
, int *eof
, void *data
)
327 struct ap_data
*ap
= (struct ap_data
*) data
;
329 struct list_head
*ptr
;
330 struct mac_entry
*entry
;
337 switch (ap
->mac_restrictions
.policy
) {
338 case MAC_POLICY_OPEN
:
341 case MAC_POLICY_ALLOW
:
342 policy_txt
= "allow";
344 case MAC_POLICY_DENY
:
348 policy_txt
= "unknown";
351 p
+= sprintf(p
, "MAC policy: %s\n", policy_txt
);
352 p
+= sprintf(p
, "MAC entries: %u\n", ap
->mac_restrictions
.entries
);
353 p
+= sprintf(p
, "MAC list:\n");
354 spin_lock_bh(&ap
->mac_restrictions
.lock
);
355 for (ptr
= ap
->mac_restrictions
.mac_list
.next
;
356 ptr
!= &ap
->mac_restrictions
.mac_list
; ptr
= ptr
->next
) {
357 if (p
- page
> PAGE_SIZE
- 80) {
358 p
+= sprintf(p
, "All entries did not fit one page.\n");
362 entry
= list_entry(ptr
, struct mac_entry
, list
);
363 p
+= sprintf(p
, MACSTR
"\n", MAC2STR(entry
->addr
));
365 spin_unlock_bh(&ap
->mac_restrictions
.lock
);
371 int ap_control_add_mac(struct mac_restrictions
*mac_restrictions
, u8
*mac
)
373 struct mac_entry
*entry
;
375 entry
= kmalloc(sizeof(struct mac_entry
), GFP_KERNEL
);
379 memcpy(entry
->addr
, mac
, ETH_ALEN
);
381 spin_lock_bh(&mac_restrictions
->lock
);
382 list_add_tail(&entry
->list
, &mac_restrictions
->mac_list
);
383 mac_restrictions
->entries
++;
384 spin_unlock_bh(&mac_restrictions
->lock
);
390 int ap_control_del_mac(struct mac_restrictions
*mac_restrictions
, u8
*mac
)
392 struct list_head
*ptr
;
393 struct mac_entry
*entry
;
395 spin_lock_bh(&mac_restrictions
->lock
);
396 for (ptr
= mac_restrictions
->mac_list
.next
;
397 ptr
!= &mac_restrictions
->mac_list
; ptr
= ptr
->next
) {
398 entry
= list_entry(ptr
, struct mac_entry
, list
);
400 if (memcmp(entry
->addr
, mac
, ETH_ALEN
) == 0) {
403 mac_restrictions
->entries
--;
404 spin_unlock_bh(&mac_restrictions
->lock
);
408 spin_unlock_bh(&mac_restrictions
->lock
);
413 static int ap_control_mac_deny(struct mac_restrictions
*mac_restrictions
,
416 struct list_head
*ptr
;
417 struct mac_entry
*entry
;
420 if (mac_restrictions
->policy
== MAC_POLICY_OPEN
)
423 spin_lock_bh(&mac_restrictions
->lock
);
424 for (ptr
= mac_restrictions
->mac_list
.next
;
425 ptr
!= &mac_restrictions
->mac_list
; ptr
= ptr
->next
) {
426 entry
= list_entry(ptr
, struct mac_entry
, list
);
428 if (memcmp(entry
->addr
, mac
, ETH_ALEN
) == 0) {
433 spin_unlock_bh(&mac_restrictions
->lock
);
435 if (mac_restrictions
->policy
== MAC_POLICY_ALLOW
)
442 void ap_control_flush_macs(struct mac_restrictions
*mac_restrictions
)
444 struct list_head
*ptr
, *n
;
445 struct mac_entry
*entry
;
447 if (mac_restrictions
->entries
== 0)
450 spin_lock_bh(&mac_restrictions
->lock
);
451 for (ptr
= mac_restrictions
->mac_list
.next
, n
= ptr
->next
;
452 ptr
!= &mac_restrictions
->mac_list
;
453 ptr
= n
, n
= ptr
->next
) {
454 entry
= list_entry(ptr
, struct mac_entry
, list
);
458 mac_restrictions
->entries
= 0;
459 spin_unlock_bh(&mac_restrictions
->lock
);
463 int ap_control_kick_mac(struct ap_data
*ap
, struct net_device
*dev
, u8
*mac
)
465 struct sta_info
*sta
;
468 spin_lock_bh(&ap
->sta_table_lock
);
469 sta
= ap_get_sta(ap
, mac
);
471 ap_sta_hash_del(ap
, sta
);
472 list_del(&sta
->list
);
474 spin_unlock_bh(&ap
->sta_table_lock
);
479 resp
= cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID
);
480 prism2_send_mgmt(dev
, IEEE80211_FTYPE_MGMT
| IEEE80211_STYPE_DEAUTH
,
481 (char *) &resp
, 2, sta
->addr
, 0);
483 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
)
484 hostap_event_expired_sta(dev
, sta
);
486 ap_free_sta(ap
, sta
);
491 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
494 void ap_control_kickall(struct ap_data
*ap
)
496 struct list_head
*ptr
, *n
;
497 struct sta_info
*sta
;
499 spin_lock_bh(&ap
->sta_table_lock
);
500 for (ptr
= ap
->sta_list
.next
, n
= ptr
->next
; ptr
!= &ap
->sta_list
;
501 ptr
= n
, n
= ptr
->next
) {
502 sta
= list_entry(ptr
, struct sta_info
, list
);
503 ap_sta_hash_del(ap
, sta
);
504 list_del(&sta
->list
);
505 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
&& sta
->local
)
506 hostap_event_expired_sta(sta
->local
->dev
, sta
);
507 ap_free_sta(ap
, sta
);
509 spin_unlock_bh(&ap
->sta_table_lock
);
513 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
515 #define PROC_LIMIT (PAGE_SIZE - 80)
517 static int prism2_ap_proc_read(char *page
, char **start
, off_t off
,
518 int count
, int *eof
, void *data
)
521 struct ap_data
*ap
= (struct ap_data
*) data
;
522 struct list_head
*ptr
;
525 if (off
> PROC_LIMIT
) {
530 p
+= sprintf(p
, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
531 spin_lock_bh(&ap
->sta_table_lock
);
532 for (ptr
= ap
->sta_list
.next
; ptr
!= &ap
->sta_list
; ptr
= ptr
->next
) {
533 struct sta_info
*sta
= (struct sta_info
*) ptr
;
538 p
+= sprintf(p
, MACSTR
" %d %d %d %d '", MAC2STR(sta
->addr
),
539 sta
->u
.ap
.channel
, sta
->last_rx_signal
,
540 sta
->last_rx_silence
, sta
->last_rx_rate
);
541 for (i
= 0; i
< sta
->u
.ap
.ssid_len
; i
++)
542 p
+= sprintf(p
, ((sta
->u
.ap
.ssid
[i
] >= 32 &&
543 sta
->u
.ap
.ssid
[i
] < 127) ?
546 p
+= sprintf(p
, "'");
547 if (sta
->capability
& WLAN_CAPABILITY_ESS
)
548 p
+= sprintf(p
, " [ESS]");
549 if (sta
->capability
& WLAN_CAPABILITY_IBSS
)
550 p
+= sprintf(p
, " [IBSS]");
551 if (sta
->capability
& WLAN_CAPABILITY_PRIVACY
)
552 p
+= sprintf(p
, " [WEP]");
553 p
+= sprintf(p
, "\n");
555 if ((p
- page
) > PROC_LIMIT
) {
556 printk(KERN_DEBUG
"hostap: ap proc did not fit\n");
560 spin_unlock_bh(&ap
->sta_table_lock
);
562 if ((p
- page
) <= off
) {
569 return (p
- page
- off
);
571 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
574 void hostap_check_sta_fw_version(struct ap_data
*ap
, int sta_fw_ver
)
579 if (sta_fw_ver
== PRISM2_FW_VER(0,8,0)) {
580 PDEBUG(DEBUG_AP
, "Using data::nullfunc ACK workaround - "
581 "firmware upgrade recommended\n");
582 ap
->nullfunc_ack
= 1;
584 ap
->nullfunc_ack
= 0;
586 if (sta_fw_ver
== PRISM2_FW_VER(1,4,2)) {
587 printk(KERN_WARNING
"%s: Warning: secondary station firmware "
588 "version 1.4.2 does not seem to work in Host AP mode\n",
589 ap
->local
->dev
->name
);
594 /* Called only as a tasklet (software IRQ) */
595 static void hostap_ap_tx_cb(struct sk_buff
*skb
, int ok
, void *data
)
597 struct ap_data
*ap
= data
;
599 struct ieee80211_hdr_4addr
*hdr
;
601 if (!ap
->local
->hostapd
|| !ap
->local
->apdev
) {
606 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
607 fc
= le16_to_cpu(hdr
->frame_ctl
);
609 /* Pass the TX callback frame to the hostapd; use 802.11 header version
610 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
612 fc
&= ~IEEE80211_FCTL_VERS
;
613 fc
|= ok
? BIT(1) : BIT(0);
614 hdr
->frame_ctl
= cpu_to_le16(fc
);
616 skb
->dev
= ap
->local
->apdev
;
617 skb_pull(skb
, hostap_80211_get_hdrlen(fc
));
618 skb
->pkt_type
= PACKET_OTHERHOST
;
619 skb
->protocol
= __constant_htons(ETH_P_802_2
);
620 memset(skb
->cb
, 0, sizeof(skb
->cb
));
625 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
626 /* Called only as a tasklet (software IRQ) */
627 static void hostap_ap_tx_cb_auth(struct sk_buff
*skb
, int ok
, void *data
)
629 struct ap_data
*ap
= data
;
630 struct net_device
*dev
= ap
->local
->dev
;
631 struct ieee80211_hdr_4addr
*hdr
;
632 u16 fc
, *pos
, auth_alg
, auth_transaction
, status
;
633 struct sta_info
*sta
= NULL
;
636 if (ap
->local
->hostapd
) {
641 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
642 fc
= le16_to_cpu(hdr
->frame_ctl
);
643 if (WLAN_FC_GET_TYPE(fc
) != IEEE80211_FTYPE_MGMT
||
644 WLAN_FC_GET_STYPE(fc
) != IEEE80211_STYPE_AUTH
||
645 skb
->len
< IEEE80211_MGMT_HDR_LEN
+ 6) {
646 printk(KERN_DEBUG
"%s: hostap_ap_tx_cb_auth received invalid "
647 "frame\n", dev
->name
);
652 pos
= (u16
*) (skb
->data
+ IEEE80211_MGMT_HDR_LEN
);
653 auth_alg
= le16_to_cpu(*pos
++);
654 auth_transaction
= le16_to_cpu(*pos
++);
655 status
= le16_to_cpu(*pos
++);
658 txt
= "frame was not ACKed";
662 spin_lock(&ap
->sta_table_lock
);
663 sta
= ap_get_sta(ap
, hdr
->addr1
);
665 atomic_inc(&sta
->users
);
666 spin_unlock(&ap
->sta_table_lock
);
669 txt
= "STA not found";
673 if (status
== WLAN_STATUS_SUCCESS
&&
674 ((auth_alg
== WLAN_AUTH_OPEN
&& auth_transaction
== 2) ||
675 (auth_alg
== WLAN_AUTH_SHARED_KEY
&& auth_transaction
== 4))) {
676 txt
= "STA authenticated";
677 sta
->flags
|= WLAN_STA_AUTH
;
678 sta
->last_auth
= jiffies
;
679 } else if (status
!= WLAN_STATUS_SUCCESS
)
680 txt
= "authentication failed";
684 atomic_dec(&sta
->users
);
686 PDEBUG(DEBUG_AP
, "%s: " MACSTR
" auth_cb - alg=%d trans#=%d "
688 dev
->name
, MAC2STR(hdr
->addr1
), auth_alg
,
689 auth_transaction
, status
, txt
);
695 /* Called only as a tasklet (software IRQ) */
696 static void hostap_ap_tx_cb_assoc(struct sk_buff
*skb
, int ok
, void *data
)
698 struct ap_data
*ap
= data
;
699 struct net_device
*dev
= ap
->local
->dev
;
700 struct ieee80211_hdr_4addr
*hdr
;
701 u16 fc
, *pos
, status
;
702 struct sta_info
*sta
= NULL
;
705 if (ap
->local
->hostapd
) {
710 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
711 fc
= le16_to_cpu(hdr
->frame_ctl
);
712 if (WLAN_FC_GET_TYPE(fc
) != IEEE80211_FTYPE_MGMT
||
713 (WLAN_FC_GET_STYPE(fc
) != IEEE80211_STYPE_ASSOC_RESP
&&
714 WLAN_FC_GET_STYPE(fc
) != IEEE80211_STYPE_REASSOC_RESP
) ||
715 skb
->len
< IEEE80211_MGMT_HDR_LEN
+ 4) {
716 printk(KERN_DEBUG
"%s: hostap_ap_tx_cb_assoc received invalid "
717 "frame\n", dev
->name
);
723 txt
= "frame was not ACKed";
727 spin_lock(&ap
->sta_table_lock
);
728 sta
= ap_get_sta(ap
, hdr
->addr1
);
730 atomic_inc(&sta
->users
);
731 spin_unlock(&ap
->sta_table_lock
);
734 txt
= "STA not found";
738 pos
= (u16
*) (skb
->data
+ IEEE80211_MGMT_HDR_LEN
);
740 status
= le16_to_cpu(*pos
++);
741 if (status
== WLAN_STATUS_SUCCESS
) {
742 if (!(sta
->flags
& WLAN_STA_ASSOC
))
743 hostap_event_new_sta(dev
, sta
);
744 txt
= "STA associated";
745 sta
->flags
|= WLAN_STA_ASSOC
;
746 sta
->last_assoc
= jiffies
;
748 txt
= "association failed";
752 atomic_dec(&sta
->users
);
754 PDEBUG(DEBUG_AP
, "%s: " MACSTR
" assoc_cb - %s\n",
755 dev
->name
, MAC2STR(hdr
->addr1
), txt
);
760 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
761 * in verifying whether the STA is still present. */
762 static void hostap_ap_tx_cb_poll(struct sk_buff
*skb
, int ok
, void *data
)
764 struct ap_data
*ap
= data
;
765 struct ieee80211_hdr_4addr
*hdr
;
766 struct sta_info
*sta
;
770 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
772 spin_lock(&ap
->sta_table_lock
);
773 sta
= ap_get_sta(ap
, hdr
->addr1
);
775 sta
->flags
&= ~WLAN_STA_PENDING_POLL
;
776 spin_unlock(&ap
->sta_table_lock
);
778 PDEBUG(DEBUG_AP
, "%s: STA " MACSTR
" did not ACK activity "
779 "poll frame\n", ap
->local
->dev
->name
,
780 MAC2STR(hdr
->addr1
));
786 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
789 void hostap_init_data(local_info_t
*local
)
791 struct ap_data
*ap
= local
->ap
;
794 printk(KERN_WARNING
"hostap_init_data: ap == NULL\n");
797 memset(ap
, 0, sizeof(struct ap_data
));
800 ap
->ap_policy
= GET_INT_PARM(other_ap_policy
, local
->card_idx
);
801 ap
->bridge_packets
= GET_INT_PARM(ap_bridge_packets
, local
->card_idx
);
803 GET_INT_PARM(ap_max_inactivity
, local
->card_idx
) * HZ
;
804 ap
->autom_ap_wds
= GET_INT_PARM(autom_ap_wds
, local
->card_idx
);
806 spin_lock_init(&ap
->sta_table_lock
);
807 INIT_LIST_HEAD(&ap
->sta_list
);
809 /* Initialize task queue structure for AP management */
810 INIT_WORK(&local
->ap
->add_sta_proc_queue
, handle_add_proc_queue
);
812 ap
->tx_callback_idx
=
813 hostap_tx_callback_register(local
, hostap_ap_tx_cb
, ap
);
814 if (ap
->tx_callback_idx
== 0)
815 printk(KERN_WARNING
"%s: failed to register TX callback for "
816 "AP\n", local
->dev
->name
);
817 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
818 INIT_WORK(&local
->ap
->wds_oper_queue
, handle_wds_oper_queue
);
820 ap
->tx_callback_auth
=
821 hostap_tx_callback_register(local
, hostap_ap_tx_cb_auth
, ap
);
822 ap
->tx_callback_assoc
=
823 hostap_tx_callback_register(local
, hostap_ap_tx_cb_assoc
, ap
);
824 ap
->tx_callback_poll
=
825 hostap_tx_callback_register(local
, hostap_ap_tx_cb_poll
, ap
);
826 if (ap
->tx_callback_auth
== 0 || ap
->tx_callback_assoc
== 0 ||
827 ap
->tx_callback_poll
== 0)
828 printk(KERN_WARNING
"%s: failed to register TX callback for "
829 "AP\n", local
->dev
->name
);
831 spin_lock_init(&ap
->mac_restrictions
.lock
);
832 INIT_LIST_HEAD(&ap
->mac_restrictions
.mac_list
);
833 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
839 void hostap_init_ap_proc(local_info_t
*local
)
841 struct ap_data
*ap
= local
->ap
;
843 ap
->proc
= local
->proc
;
844 if (ap
->proc
== NULL
)
847 #ifndef PRISM2_NO_PROCFS_DEBUG
848 create_proc_read_entry("ap_debug", 0, ap
->proc
,
849 ap_debug_proc_read
, ap
);
850 #endif /* PRISM2_NO_PROCFS_DEBUG */
852 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
853 create_proc_read_entry("ap_control", 0, ap
->proc
,
854 ap_control_proc_read
, ap
);
855 create_proc_read_entry("ap", 0, ap
->proc
,
856 prism2_ap_proc_read
, ap
);
857 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
862 void hostap_free_data(struct ap_data
*ap
)
864 struct list_head
*n
, *ptr
;
866 if (ap
== NULL
|| !ap
->initialized
) {
867 printk(KERN_DEBUG
"hostap_free_data: ap has not yet been "
868 "initialized - skip resource freeing\n");
872 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
874 ap
->crypt
->deinit(ap
->crypt_priv
);
875 ap
->crypt
= ap
->crypt_priv
= NULL
;
876 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
878 list_for_each_safe(ptr
, n
, &ap
->sta_list
) {
879 struct sta_info
*sta
= list_entry(ptr
, struct sta_info
, list
);
880 ap_sta_hash_del(ap
, sta
);
881 list_del(&sta
->list
);
882 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
&& sta
->local
)
883 hostap_event_expired_sta(sta
->local
->dev
, sta
);
884 ap_free_sta(ap
, sta
);
887 #ifndef PRISM2_NO_PROCFS_DEBUG
888 if (ap
->proc
!= NULL
) {
889 remove_proc_entry("ap_debug", ap
->proc
);
891 #endif /* PRISM2_NO_PROCFS_DEBUG */
893 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
894 if (ap
->proc
!= NULL
) {
895 remove_proc_entry("ap", ap
->proc
);
896 remove_proc_entry("ap_control", ap
->proc
);
898 ap_control_flush_macs(&ap
->mac_restrictions
);
899 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
905 /* caller should have mutex for AP STA list handling */
906 static struct sta_info
* ap_get_sta(struct ap_data
*ap
, u8
*sta
)
910 s
= ap
->sta_hash
[STA_HASH(sta
)];
911 while (s
!= NULL
&& memcmp(s
->addr
, sta
, ETH_ALEN
) != 0)
917 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
919 /* Called from timer handler and from scheduled AP queue handlers */
920 static void prism2_send_mgmt(struct net_device
*dev
,
921 u16 type_subtype
, char *body
,
922 int body_len
, u8
*addr
, u16 tx_cb_idx
)
924 struct hostap_interface
*iface
;
926 struct ieee80211_hdr_4addr
*hdr
;
929 struct hostap_skb_tx_data
*meta
;
932 iface
= netdev_priv(dev
);
933 local
= iface
->local
;
934 dev
= local
->dev
; /* always use master radio device */
935 iface
= netdev_priv(dev
);
937 if (!(dev
->flags
& IFF_UP
)) {
938 PDEBUG(DEBUG_AP
, "%s: prism2_send_mgmt - device is not UP - "
939 "cannot send frame\n", dev
->name
);
943 skb
= dev_alloc_skb(sizeof(*hdr
) + body_len
);
945 PDEBUG(DEBUG_AP
, "%s: prism2_send_mgmt failed to allocate "
951 hdrlen
= hostap_80211_get_hdrlen(fc
);
952 hdr
= (struct ieee80211_hdr_4addr
*) skb_put(skb
, hdrlen
);
954 memcpy(skb_put(skb
, body_len
), body
, body_len
);
956 memset(hdr
, 0, hdrlen
);
958 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
959 * tx_control instead of using local->tx_control */
962 memcpy(hdr
->addr1
, addr
, ETH_ALEN
); /* DA / RA */
963 if (WLAN_FC_GET_TYPE(fc
) == IEEE80211_FTYPE_DATA
) {
964 fc
|= IEEE80211_FCTL_FROMDS
;
965 memcpy(hdr
->addr2
, dev
->dev_addr
, ETH_ALEN
); /* BSSID */
966 memcpy(hdr
->addr3
, dev
->dev_addr
, ETH_ALEN
); /* SA */
967 } else if (WLAN_FC_GET_TYPE(fc
) == IEEE80211_FTYPE_CTL
) {
968 /* control:ACK does not have addr2 or addr3 */
969 memset(hdr
->addr2
, 0, ETH_ALEN
);
970 memset(hdr
->addr3
, 0, ETH_ALEN
);
972 memcpy(hdr
->addr2
, dev
->dev_addr
, ETH_ALEN
); /* SA */
973 memcpy(hdr
->addr3
, dev
->dev_addr
, ETH_ALEN
); /* BSSID */
976 hdr
->frame_ctl
= cpu_to_le16(fc
);
978 meta
= (struct hostap_skb_tx_data
*) skb
->cb
;
979 memset(meta
, 0, sizeof(*meta
));
980 meta
->magic
= HOSTAP_SKB_TX_DATA_MAGIC
;
982 meta
->tx_cb_idx
= tx_cb_idx
;
985 skb
->mac
.raw
= skb
->nh
.raw
= skb
->data
;
988 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
991 static int prism2_sta_proc_read(char *page
, char **start
, off_t off
,
992 int count
, int *eof
, void *data
)
995 struct sta_info
*sta
= (struct sta_info
*) data
;
998 /* FIX: possible race condition.. the STA data could have just expired,
999 * but proc entry was still here so that the read could have started;
1000 * some locking should be done here.. */
1007 p
+= sprintf(p
, "%s=" MACSTR
"\nusers=%d\naid=%d\n"
1008 "flags=0x%04x%s%s%s%s%s%s%s\n"
1009 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1010 sta
->ap
? "AP" : "STA",
1011 MAC2STR(sta
->addr
), atomic_read(&sta
->users
), sta
->aid
,
1013 sta
->flags
& WLAN_STA_AUTH
? " AUTH" : "",
1014 sta
->flags
& WLAN_STA_ASSOC
? " ASSOC" : "",
1015 sta
->flags
& WLAN_STA_PS
? " PS" : "",
1016 sta
->flags
& WLAN_STA_TIM
? " TIM" : "",
1017 sta
->flags
& WLAN_STA_PERM
? " PERM" : "",
1018 sta
->flags
& WLAN_STA_AUTHORIZED
? " AUTHORIZED" : "",
1019 sta
->flags
& WLAN_STA_PENDING_POLL
? " POLL" : "",
1020 sta
->capability
, sta
->listen_interval
);
1021 /* supported_rates: 500 kbit/s units with msb ignored */
1022 for (i
= 0; i
< sizeof(sta
->supported_rates
); i
++)
1023 if (sta
->supported_rates
[i
] != 0)
1024 p
+= sprintf(p
, "%d%sMbps ",
1025 (sta
->supported_rates
[i
] & 0x7f) / 2,
1026 sta
->supported_rates
[i
] & 1 ? ".5" : "");
1027 p
+= sprintf(p
, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1028 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1030 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1031 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1032 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1034 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1035 jiffies
, sta
->last_auth
, sta
->last_assoc
, sta
->last_rx
,
1037 sta
->rx_packets
, sta
->tx_packets
, sta
->rx_bytes
,
1038 sta
->tx_bytes
, skb_queue_len(&sta
->tx_buf
),
1039 sta
->last_rx_silence
,
1040 sta
->last_rx_signal
, sta
->last_rx_rate
/ 10,
1041 sta
->last_rx_rate
% 10 ? ".5" : "",
1042 sta
->tx_rate
, sta
->tx_count
[0], sta
->tx_count
[1],
1043 sta
->tx_count
[2], sta
->tx_count
[3], sta
->rx_count
[0],
1044 sta
->rx_count
[1], sta
->rx_count
[2], sta
->rx_count
[3]);
1045 if (sta
->crypt
&& sta
->crypt
->ops
&& sta
->crypt
->ops
->print_stats
)
1046 p
= sta
->crypt
->ops
->print_stats(p
, sta
->crypt
->priv
);
1047 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1049 if (sta
->u
.ap
.channel
>= 0)
1050 p
+= sprintf(p
, "channel=%d\n", sta
->u
.ap
.channel
);
1051 p
+= sprintf(p
, "ssid=");
1052 for (i
= 0; i
< sta
->u
.ap
.ssid_len
; i
++)
1053 p
+= sprintf(p
, ((sta
->u
.ap
.ssid
[i
] >= 32 &&
1054 sta
->u
.ap
.ssid
[i
] < 127) ?
1057 p
+= sprintf(p
, "\n");
1059 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1065 static void handle_add_proc_queue(struct work_struct
*work
)
1067 struct ap_data
*ap
= container_of(work
, struct ap_data
,
1068 add_sta_proc_queue
);
1069 struct sta_info
*sta
;
1071 struct add_sta_proc_data
*entry
, *prev
;
1073 entry
= ap
->add_sta_proc_entries
;
1074 ap
->add_sta_proc_entries
= NULL
;
1077 spin_lock_bh(&ap
->sta_table_lock
);
1078 sta
= ap_get_sta(ap
, entry
->addr
);
1080 atomic_inc(&sta
->users
);
1081 spin_unlock_bh(&ap
->sta_table_lock
);
1084 sprintf(name
, MACSTR
, MAC2STR(sta
->addr
));
1085 sta
->proc
= create_proc_read_entry(
1087 prism2_sta_proc_read
, sta
);
1089 atomic_dec(&sta
->users
);
1093 entry
= entry
->next
;
1099 static struct sta_info
* ap_add_sta(struct ap_data
*ap
, u8
*addr
)
1101 struct sta_info
*sta
;
1103 sta
= (struct sta_info
*)
1104 kmalloc(sizeof(struct sta_info
), GFP_ATOMIC
);
1106 PDEBUG(DEBUG_AP
, "AP: kmalloc failed\n");
1110 /* initialize STA info data */
1111 memset(sta
, 0, sizeof(struct sta_info
));
1112 sta
->local
= ap
->local
;
1113 skb_queue_head_init(&sta
->tx_buf
);
1114 memcpy(sta
->addr
, addr
, ETH_ALEN
);
1116 atomic_inc(&sta
->users
);
1117 spin_lock_bh(&ap
->sta_table_lock
);
1118 list_add(&sta
->list
, &ap
->sta_list
);
1120 ap_sta_hash_add(ap
, sta
);
1121 spin_unlock_bh(&ap
->sta_table_lock
);
1124 struct add_sta_proc_data
*entry
;
1125 /* schedule a non-interrupt context process to add a procfs
1126 * entry for the STA since procfs code use GFP_KERNEL */
1127 entry
= kmalloc(sizeof(*entry
), GFP_ATOMIC
);
1129 memcpy(entry
->addr
, sta
->addr
, ETH_ALEN
);
1130 entry
->next
= ap
->add_sta_proc_entries
;
1131 ap
->add_sta_proc_entries
= entry
;
1132 schedule_work(&ap
->add_sta_proc_queue
);
1134 printk(KERN_DEBUG
"Failed to add STA proc data\n");
1137 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1138 init_timer(&sta
->timer
);
1139 sta
->timer
.expires
= jiffies
+ ap
->max_inactivity
;
1140 sta
->timer
.data
= (unsigned long) sta
;
1141 sta
->timer
.function
= ap_handle_timer
;
1142 if (!ap
->local
->hostapd
)
1143 add_timer(&sta
->timer
);
1144 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1150 static int ap_tx_rate_ok(int rateidx
, struct sta_info
*sta
,
1151 local_info_t
*local
)
1153 if (rateidx
> sta
->tx_max_rate
||
1154 !(sta
->tx_supp_rates
& (1 << rateidx
)))
1157 if (local
->tx_rate_control
!= 0 &&
1158 !(local
->tx_rate_control
& (1 << rateidx
)))
1165 static void prism2_check_tx_rates(struct sta_info
*sta
)
1169 sta
->tx_supp_rates
= 0;
1170 for (i
= 0; i
< sizeof(sta
->supported_rates
); i
++) {
1171 if ((sta
->supported_rates
[i
] & 0x7f) == 2)
1172 sta
->tx_supp_rates
|= WLAN_RATE_1M
;
1173 if ((sta
->supported_rates
[i
] & 0x7f) == 4)
1174 sta
->tx_supp_rates
|= WLAN_RATE_2M
;
1175 if ((sta
->supported_rates
[i
] & 0x7f) == 11)
1176 sta
->tx_supp_rates
|= WLAN_RATE_5M5
;
1177 if ((sta
->supported_rates
[i
] & 0x7f) == 22)
1178 sta
->tx_supp_rates
|= WLAN_RATE_11M
;
1180 sta
->tx_max_rate
= sta
->tx_rate
= sta
->tx_rate_idx
= 0;
1181 if (sta
->tx_supp_rates
& WLAN_RATE_1M
) {
1182 sta
->tx_max_rate
= 0;
1183 if (ap_tx_rate_ok(0, sta
, sta
->local
)) {
1185 sta
->tx_rate_idx
= 0;
1188 if (sta
->tx_supp_rates
& WLAN_RATE_2M
) {
1189 sta
->tx_max_rate
= 1;
1190 if (ap_tx_rate_ok(1, sta
, sta
->local
)) {
1192 sta
->tx_rate_idx
= 1;
1195 if (sta
->tx_supp_rates
& WLAN_RATE_5M5
) {
1196 sta
->tx_max_rate
= 2;
1197 if (ap_tx_rate_ok(2, sta
, sta
->local
)) {
1199 sta
->tx_rate_idx
= 2;
1202 if (sta
->tx_supp_rates
& WLAN_RATE_11M
) {
1203 sta
->tx_max_rate
= 3;
1204 if (ap_tx_rate_ok(3, sta
, sta
->local
)) {
1206 sta
->tx_rate_idx
= 3;
1212 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1214 static void ap_crypt_init(struct ap_data
*ap
)
1216 ap
->crypt
= ieee80211_get_crypto_ops("WEP");
1219 if (ap
->crypt
->init
) {
1220 ap
->crypt_priv
= ap
->crypt
->init(0);
1221 if (ap
->crypt_priv
== NULL
)
1224 u8 key
[WEP_KEY_LEN
];
1225 get_random_bytes(key
, WEP_KEY_LEN
);
1226 ap
->crypt
->set_key(key
, WEP_KEY_LEN
, NULL
,
1232 if (ap
->crypt
== NULL
) {
1233 printk(KERN_WARNING
"AP could not initialize WEP: load module "
1234 "ieee80211_crypt_wep.ko\n");
1239 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1240 * that WEP algorithm is used for generating challange. This should be unique,
1241 * but otherwise there is not really need for randomness etc. Initialize WEP
1242 * with pseudo random key and then use increasing IV to get unique challenge
1245 * Called only as a scheduled task for pending AP frames.
1247 static char * ap_auth_make_challenge(struct ap_data
*ap
)
1250 struct sk_buff
*skb
;
1252 if (ap
->crypt
== NULL
) {
1254 if (ap
->crypt
== NULL
)
1258 tmpbuf
= (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN
, GFP_ATOMIC
);
1259 if (tmpbuf
== NULL
) {
1260 PDEBUG(DEBUG_AP
, "AP: kmalloc failed for challenge\n");
1264 skb
= dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN
+
1265 ap
->crypt
->extra_mpdu_prefix_len
+
1266 ap
->crypt
->extra_mpdu_postfix_len
);
1272 skb_reserve(skb
, ap
->crypt
->extra_mpdu_prefix_len
);
1273 memset(skb_put(skb
, WLAN_AUTH_CHALLENGE_LEN
), 0,
1274 WLAN_AUTH_CHALLENGE_LEN
);
1275 if (ap
->crypt
->encrypt_mpdu(skb
, 0, ap
->crypt_priv
)) {
1281 memcpy(tmpbuf
, skb
->data
+ ap
->crypt
->extra_mpdu_prefix_len
,
1282 WLAN_AUTH_CHALLENGE_LEN
);
1289 /* Called only as a scheduled task for pending AP frames. */
1290 static void handle_authen(local_info_t
*local
, struct sk_buff
*skb
,
1291 struct hostap_80211_rx_status
*rx_stats
)
1293 struct net_device
*dev
= local
->dev
;
1294 struct ieee80211_hdr_4addr
*hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
1296 struct ap_data
*ap
= local
->ap
;
1297 char body
[8 + WLAN_AUTH_CHALLENGE_LEN
], *challenge
= NULL
;
1299 u16 auth_alg
, auth_transaction
, status_code
, *pos
;
1300 u16 resp
= WLAN_STATUS_SUCCESS
, fc
;
1301 struct sta_info
*sta
= NULL
;
1302 struct ieee80211_crypt_data
*crypt
;
1305 len
= skb
->len
- IEEE80211_MGMT_HDR_LEN
;
1307 fc
= le16_to_cpu(hdr
->frame_ctl
);
1308 hdrlen
= hostap_80211_get_hdrlen(fc
);
1311 PDEBUG(DEBUG_AP
, "%s: handle_authen - too short payload "
1312 "(len=%d) from " MACSTR
"\n", dev
->name
, len
,
1313 MAC2STR(hdr
->addr2
));
1317 spin_lock_bh(&local
->ap
->sta_table_lock
);
1318 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1320 atomic_inc(&sta
->users
);
1321 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1323 if (sta
&& sta
->crypt
)
1327 if (skb
->len
>= hdrlen
+ 3)
1328 idx
= skb
->data
[hdrlen
+ 3] >> 6;
1329 crypt
= local
->crypt
[idx
];
1332 pos
= (u16
*) (skb
->data
+ IEEE80211_MGMT_HDR_LEN
);
1333 auth_alg
= __le16_to_cpu(*pos
);
1335 auth_transaction
= __le16_to_cpu(*pos
);
1337 status_code
= __le16_to_cpu(*pos
);
1340 if (memcmp(dev
->dev_addr
, hdr
->addr2
, ETH_ALEN
) == 0 ||
1341 ap_control_mac_deny(&ap
->mac_restrictions
, hdr
->addr2
)) {
1342 txt
= "authentication denied";
1343 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1347 if (((local
->auth_algs
& PRISM2_AUTH_OPEN
) &&
1348 auth_alg
== WLAN_AUTH_OPEN
) ||
1349 ((local
->auth_algs
& PRISM2_AUTH_SHARED_KEY
) &&
1350 crypt
&& auth_alg
== WLAN_AUTH_SHARED_KEY
)) {
1352 txt
= "unsupported algorithm";
1353 resp
= WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
;
1359 if (*u
== WLAN_EID_CHALLENGE
) {
1360 if (*(u
+ 1) != WLAN_AUTH_CHALLENGE_LEN
) {
1361 txt
= "invalid challenge len";
1362 resp
= WLAN_STATUS_CHALLENGE_FAIL
;
1365 if (len
- 8 < WLAN_AUTH_CHALLENGE_LEN
) {
1366 txt
= "challenge underflow";
1367 resp
= WLAN_STATUS_CHALLENGE_FAIL
;
1370 challenge
= (char *) (u
+ 2);
1374 if (sta
&& sta
->ap
) {
1375 if (time_after(jiffies
, sta
->u
.ap
.last_beacon
+
1376 (10 * sta
->listen_interval
* HZ
) / 1024)) {
1377 PDEBUG(DEBUG_AP
, "%s: no beacons received for a while,"
1378 " assuming AP " MACSTR
" is now STA\n",
1379 dev
->name
, MAC2STR(sta
->addr
));
1382 sta
->u
.sta
.challenge
= NULL
;
1384 txt
= "AP trying to authenticate?";
1385 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1390 if ((auth_alg
== WLAN_AUTH_OPEN
&& auth_transaction
== 1) ||
1391 (auth_alg
== WLAN_AUTH_SHARED_KEY
&&
1392 (auth_transaction
== 1 ||
1393 (auth_transaction
== 3 && sta
!= NULL
&&
1394 sta
->u
.sta
.challenge
!= NULL
)))) {
1396 txt
= "unknown authentication transaction number";
1397 resp
= WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION
;
1404 if (local
->ap
->num_sta
>= MAX_STA_COUNT
) {
1405 /* FIX: might try to remove some old STAs first? */
1406 txt
= "no more room for new STAs";
1407 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1411 sta
= ap_add_sta(local
->ap
, hdr
->addr2
);
1413 txt
= "ap_add_sta failed";
1414 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1420 case WLAN_AUTH_OPEN
:
1422 /* IEEE 802.11 standard is not completely clear about
1423 * whether STA is considered authenticated after
1424 * authentication OK frame has been send or after it
1425 * has been ACKed. In order to reduce interoperability
1426 * issues, mark the STA authenticated before ACK. */
1427 sta
->flags
|= WLAN_STA_AUTH
;
1430 case WLAN_AUTH_SHARED_KEY
:
1431 if (auth_transaction
== 1) {
1432 if (sta
->u
.sta
.challenge
== NULL
) {
1433 sta
->u
.sta
.challenge
=
1434 ap_auth_make_challenge(local
->ap
);
1435 if (sta
->u
.sta
.challenge
== NULL
) {
1436 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1441 if (sta
->u
.sta
.challenge
== NULL
||
1442 challenge
== NULL
||
1443 memcmp(sta
->u
.sta
.challenge
, challenge
,
1444 WLAN_AUTH_CHALLENGE_LEN
) != 0 ||
1445 !(fc
& IEEE80211_FCTL_PROTECTED
)) {
1446 txt
= "challenge response incorrect";
1447 resp
= WLAN_STATUS_CHALLENGE_FAIL
;
1451 txt
= "challenge OK - authOK";
1452 /* IEEE 802.11 standard is not completely clear about
1453 * whether STA is considered authenticated after
1454 * authentication OK frame has been send or after it
1455 * has been ACKed. In order to reduce interoperability
1456 * issues, mark the STA authenticated before ACK. */
1457 sta
->flags
|= WLAN_STA_AUTH
;
1458 kfree(sta
->u
.sta
.challenge
);
1459 sta
->u
.sta
.challenge
= NULL
;
1466 *pos
= cpu_to_le16(auth_alg
);
1468 *pos
= cpu_to_le16(auth_transaction
+ 1);
1470 *pos
= cpu_to_le16(resp
); /* status_code */
1474 if (resp
== WLAN_STATUS_SUCCESS
&& sta
!= NULL
&&
1475 sta
->u
.sta
.challenge
!= NULL
&&
1476 auth_alg
== WLAN_AUTH_SHARED_KEY
&& auth_transaction
== 1) {
1477 u8
*tmp
= (u8
*) pos
;
1478 *tmp
++ = WLAN_EID_CHALLENGE
;
1479 *tmp
++ = WLAN_AUTH_CHALLENGE_LEN
;
1481 memcpy(pos
, sta
->u
.sta
.challenge
, WLAN_AUTH_CHALLENGE_LEN
);
1482 olen
+= 2 + WLAN_AUTH_CHALLENGE_LEN
;
1485 prism2_send_mgmt(dev
, IEEE80211_FTYPE_MGMT
| IEEE80211_STYPE_AUTH
,
1486 body
, olen
, hdr
->addr2
, ap
->tx_callback_auth
);
1489 sta
->last_rx
= jiffies
;
1490 atomic_dec(&sta
->users
);
1494 PDEBUG(DEBUG_AP
, "%s: " MACSTR
" auth (alg=%d trans#=%d "
1495 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1496 dev
->name
, MAC2STR(hdr
->addr2
), auth_alg
,
1497 auth_transaction
, status_code
, len
, fc
, resp
, txt
);
1502 /* Called only as a scheduled task for pending AP frames. */
1503 static void handle_assoc(local_info_t
*local
, struct sk_buff
*skb
,
1504 struct hostap_80211_rx_status
*rx_stats
, int reassoc
)
1506 struct net_device
*dev
= local
->dev
;
1507 struct ieee80211_hdr_4addr
*hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
1508 char body
[12], *p
, *lpos
;
1511 u16 resp
= WLAN_STATUS_SUCCESS
;
1512 struct sta_info
*sta
= NULL
;
1513 int send_deauth
= 0;
1515 u8 prev_ap
[ETH_ALEN
];
1517 left
= len
= skb
->len
- IEEE80211_MGMT_HDR_LEN
;
1519 if (len
< (reassoc
? 10 : 4)) {
1520 PDEBUG(DEBUG_AP
, "%s: handle_assoc - too short payload "
1521 "(len=%d, reassoc=%d) from " MACSTR
"\n",
1522 dev
->name
, len
, reassoc
, MAC2STR(hdr
->addr2
));
1526 spin_lock_bh(&local
->ap
->sta_table_lock
);
1527 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1528 if (sta
== NULL
|| (sta
->flags
& WLAN_STA_AUTH
) == 0) {
1529 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1530 txt
= "trying to associate before authentication";
1532 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1533 sta
= NULL
; /* do not decrement sta->users */
1536 atomic_inc(&sta
->users
);
1537 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1539 pos
= (u16
*) (skb
->data
+ IEEE80211_MGMT_HDR_LEN
);
1540 sta
->capability
= __le16_to_cpu(*pos
);
1542 sta
->listen_interval
= __le16_to_cpu(*pos
);
1546 memcpy(prev_ap
, pos
, ETH_ALEN
);
1547 pos
++; pos
++; pos
++; left
-= 6;
1549 memset(prev_ap
, 0, ETH_ALEN
);
1553 unsigned char *u
= (unsigned char *) pos
;
1555 if (*u
== WLAN_EID_SSID
) {
1560 if (ileft
> left
|| ileft
> MAX_SSID_LEN
) {
1561 txt
= "SSID overflow";
1562 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1566 if (ileft
!= strlen(local
->essid
) ||
1567 memcmp(local
->essid
, u
, ileft
) != 0) {
1568 txt
= "not our SSID";
1569 resp
= WLAN_STATUS_ASSOC_DENIED_UNSPEC
;
1577 if (left
>= 2 && *u
== WLAN_EID_SUPP_RATES
) {
1582 if (ileft
> left
|| ileft
== 0 ||
1583 ileft
> WLAN_SUPP_RATES_MAX
) {
1584 txt
= "SUPP_RATES len error";
1585 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1589 memset(sta
->supported_rates
, 0,
1590 sizeof(sta
->supported_rates
));
1591 memcpy(sta
->supported_rates
, u
, ileft
);
1592 prism2_check_tx_rates(sta
);
1599 PDEBUG(DEBUG_AP
, "%s: assoc from " MACSTR
" with extra"
1600 " data (%d bytes) [",
1601 dev
->name
, MAC2STR(hdr
->addr2
), left
);
1603 PDEBUG2(DEBUG_AP
, "<%02x>", *u
);
1606 PDEBUG2(DEBUG_AP
, "]\n");
1609 txt
= "frame underflow";
1610 resp
= WLAN_STATUS_UNSPECIFIED_FAILURE
;
1614 /* get a unique AID */
1616 txt
= "OK, old AID";
1618 spin_lock_bh(&local
->ap
->sta_table_lock
);
1619 for (sta
->aid
= 1; sta
->aid
<= MAX_AID_TABLE_SIZE
; sta
->aid
++)
1620 if (local
->ap
->sta_aid
[sta
->aid
- 1] == NULL
)
1622 if (sta
->aid
> MAX_AID_TABLE_SIZE
) {
1624 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1625 resp
= WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA
;
1626 txt
= "no room for more AIDs";
1628 local
->ap
->sta_aid
[sta
->aid
- 1] = sta
;
1629 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1630 txt
= "OK, new AID";
1638 *pos
= __constant_cpu_to_le16(
1639 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH
);
1642 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1643 * values in beacons/probe responses */
1644 /* FIX: how about privacy and WEP? */
1646 *pos
= __constant_cpu_to_le16(WLAN_CAPABILITY_ESS
);
1650 *pos
= __cpu_to_le16(resp
);
1653 *pos
= __cpu_to_le16((sta
&& sta
->aid
> 0 ? sta
->aid
: 0) |
1654 BIT(14) | BIT(15)); /* AID */
1657 /* Supported rates (Information element) */
1659 *p
++ = WLAN_EID_SUPP_RATES
;
1662 if (local
->tx_rate_control
& WLAN_RATE_1M
) {
1663 *p
++ = local
->basic_rates
& WLAN_RATE_1M
? 0x82 : 0x02;
1666 if (local
->tx_rate_control
& WLAN_RATE_2M
) {
1667 *p
++ = local
->basic_rates
& WLAN_RATE_2M
? 0x84 : 0x04;
1670 if (local
->tx_rate_control
& WLAN_RATE_5M5
) {
1671 *p
++ = local
->basic_rates
& WLAN_RATE_5M5
?
1675 if (local
->tx_rate_control
& WLAN_RATE_11M
) {
1676 *p
++ = local
->basic_rates
& WLAN_RATE_11M
?
1683 prism2_send_mgmt(dev
, IEEE80211_FTYPE_MGMT
|
1684 (send_deauth
? IEEE80211_STYPE_DEAUTH
:
1685 (reassoc
? IEEE80211_STYPE_REASSOC_RESP
:
1686 IEEE80211_STYPE_ASSOC_RESP
)),
1687 body
, (u8
*) pos
- (u8
*) body
,
1689 send_deauth
? 0 : local
->ap
->tx_callback_assoc
);
1692 if (resp
== WLAN_STATUS_SUCCESS
) {
1693 sta
->last_rx
= jiffies
;
1694 /* STA will be marked associated from TX callback, if
1695 * AssocResp is ACKed */
1697 atomic_dec(&sta
->users
);
1701 PDEBUG(DEBUG_AP
, "%s: " MACSTR
" %sassoc (len=%d prev_ap=" MACSTR
1702 ") => %d(%d) (%s)\n",
1703 dev
->name
, MAC2STR(hdr
->addr2
), reassoc
? "re" : "", len
,
1704 MAC2STR(prev_ap
), resp
, send_deauth
, txt
);
1709 /* Called only as a scheduled task for pending AP frames. */
1710 static void handle_deauth(local_info_t
*local
, struct sk_buff
*skb
,
1711 struct hostap_80211_rx_status
*rx_stats
)
1713 struct net_device
*dev
= local
->dev
;
1714 struct ieee80211_hdr_4addr
*hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
1715 char *body
= (char *) (skb
->data
+ IEEE80211_MGMT_HDR_LEN
);
1717 u16 reason_code
, *pos
;
1718 struct sta_info
*sta
= NULL
;
1720 len
= skb
->len
- IEEE80211_MGMT_HDR_LEN
;
1723 printk("handle_deauth - too short payload (len=%d)\n", len
);
1728 reason_code
= __le16_to_cpu(*pos
);
1730 PDEBUG(DEBUG_AP
, "%s: deauthentication: " MACSTR
" len=%d, "
1731 "reason_code=%d\n", dev
->name
, MAC2STR(hdr
->addr2
), len
,
1734 spin_lock_bh(&local
->ap
->sta_table_lock
);
1735 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1737 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
)
1738 hostap_event_expired_sta(local
->dev
, sta
);
1739 sta
->flags
&= ~(WLAN_STA_AUTH
| WLAN_STA_ASSOC
);
1741 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1743 printk("%s: deauthentication from " MACSTR
", "
1744 "reason_code=%d, but STA not authenticated\n", dev
->name
,
1745 MAC2STR(hdr
->addr2
), reason_code
);
1750 /* Called only as a scheduled task for pending AP frames. */
1751 static void handle_disassoc(local_info_t
*local
, struct sk_buff
*skb
,
1752 struct hostap_80211_rx_status
*rx_stats
)
1754 struct net_device
*dev
= local
->dev
;
1755 struct ieee80211_hdr_4addr
*hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
1756 char *body
= skb
->data
+ IEEE80211_MGMT_HDR_LEN
;
1758 u16 reason_code
, *pos
;
1759 struct sta_info
*sta
= NULL
;
1761 len
= skb
->len
- IEEE80211_MGMT_HDR_LEN
;
1764 printk("handle_disassoc - too short payload (len=%d)\n", len
);
1769 reason_code
= __le16_to_cpu(*pos
);
1771 PDEBUG(DEBUG_AP
, "%s: disassociation: " MACSTR
" len=%d, "
1772 "reason_code=%d\n", dev
->name
, MAC2STR(hdr
->addr2
), len
,
1775 spin_lock_bh(&local
->ap
->sta_table_lock
);
1776 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1778 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
)
1779 hostap_event_expired_sta(local
->dev
, sta
);
1780 sta
->flags
&= ~WLAN_STA_ASSOC
;
1782 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1784 printk("%s: disassociation from " MACSTR
", "
1785 "reason_code=%d, but STA not authenticated\n",
1786 dev
->name
, MAC2STR(hdr
->addr2
), reason_code
);
1791 /* Called only as a scheduled task for pending AP frames. */
1792 static void ap_handle_data_nullfunc(local_info_t
*local
,
1793 struct ieee80211_hdr_4addr
*hdr
)
1795 struct net_device
*dev
= local
->dev
;
1797 /* some STA f/w's seem to require control::ACK frame for
1798 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1800 * send control::ACK for the data::nullfunc */
1802 printk(KERN_DEBUG
"Sending control::ACK for data::nullfunc\n");
1803 prism2_send_mgmt(dev
, IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_ACK
,
1804 NULL
, 0, hdr
->addr2
, 0);
1808 /* Called only as a scheduled task for pending AP frames. */
1809 static void ap_handle_dropped_data(local_info_t
*local
,
1810 struct ieee80211_hdr_4addr
*hdr
)
1812 struct net_device
*dev
= local
->dev
;
1813 struct sta_info
*sta
;
1816 spin_lock_bh(&local
->ap
->sta_table_lock
);
1817 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1819 atomic_inc(&sta
->users
);
1820 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1822 if (sta
!= NULL
&& (sta
->flags
& WLAN_STA_ASSOC
)) {
1823 PDEBUG(DEBUG_AP
, "ap_handle_dropped_data: STA is now okay?\n");
1824 atomic_dec(&sta
->users
);
1828 reason
= __constant_cpu_to_le16(
1829 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA
);
1830 prism2_send_mgmt(dev
, IEEE80211_FTYPE_MGMT
|
1831 ((sta
== NULL
|| !(sta
->flags
& WLAN_STA_ASSOC
)) ?
1832 IEEE80211_STYPE_DEAUTH
: IEEE80211_STYPE_DISASSOC
),
1833 (char *) &reason
, sizeof(reason
), hdr
->addr2
, 0);
1836 atomic_dec(&sta
->users
);
1839 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1842 /* Called only as a scheduled task for pending AP frames. */
1843 static void pspoll_send_buffered(local_info_t
*local
, struct sta_info
*sta
,
1844 struct sk_buff
*skb
)
1846 struct hostap_skb_tx_data
*meta
;
1848 if (!(sta
->flags
& WLAN_STA_PS
)) {
1849 /* Station has moved to non-PS mode, so send all buffered
1850 * frames using normal device queue. */
1851 dev_queue_xmit(skb
);
1855 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1856 * be passed through even though STA is using PS */
1857 meta
= (struct hostap_skb_tx_data
*) skb
->cb
;
1858 meta
->flags
|= HOSTAP_TX_FLAGS_BUFFERED_FRAME
;
1859 if (!skb_queue_empty(&sta
->tx_buf
)) {
1860 /* indicate to STA that more frames follow */
1861 meta
->flags
|= HOSTAP_TX_FLAGS_ADD_MOREDATA
;
1863 dev_queue_xmit(skb
);
1867 /* Called only as a scheduled task for pending AP frames. */
1868 static void handle_pspoll(local_info_t
*local
,
1869 struct ieee80211_hdr_4addr
*hdr
,
1870 struct hostap_80211_rx_status
*rx_stats
)
1872 struct net_device
*dev
= local
->dev
;
1873 struct sta_info
*sta
;
1875 struct sk_buff
*skb
;
1877 PDEBUG(DEBUG_PS2
, "handle_pspoll: BSSID=" MACSTR
", TA=" MACSTR
1879 MAC2STR(hdr
->addr1
), MAC2STR(hdr
->addr2
),
1880 !!(le16_to_cpu(hdr
->frame_ctl
) & IEEE80211_FCTL_PM
));
1882 if (memcmp(hdr
->addr1
, dev
->dev_addr
, ETH_ALEN
)) {
1883 PDEBUG(DEBUG_AP
, "handle_pspoll - addr1(BSSID)=" MACSTR
1884 " not own MAC\n", MAC2STR(hdr
->addr1
));
1888 aid
= __le16_to_cpu(hdr
->duration_id
);
1889 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1890 PDEBUG(DEBUG_PS
, " PSPOLL and AID[15:14] not set\n");
1893 aid
&= ~BIT(15) & ~BIT(14);
1894 if (aid
== 0 || aid
> MAX_AID_TABLE_SIZE
) {
1895 PDEBUG(DEBUG_PS
, " invalid aid=%d\n", aid
);
1898 PDEBUG(DEBUG_PS2
, " aid=%d\n", aid
);
1900 spin_lock_bh(&local
->ap
->sta_table_lock
);
1901 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
1903 atomic_inc(&sta
->users
);
1904 spin_unlock_bh(&local
->ap
->sta_table_lock
);
1907 PDEBUG(DEBUG_PS
, " STA not found\n");
1910 if (sta
->aid
!= aid
) {
1911 PDEBUG(DEBUG_PS
, " received aid=%i does not match with "
1912 "assoc.aid=%d\n", aid
, sta
->aid
);
1917 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1918 * out (expiry time must be longer than ListenInterval for
1919 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1920 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1921 * sta; store buffer for later use and leave TIM aid bit set? use
1922 * TX event to check whether frame was ACKed?
1925 while ((skb
= skb_dequeue(&sta
->tx_buf
)) != NULL
) {
1926 /* send buffered frame .. */
1927 PDEBUG(DEBUG_PS2
, "Sending buffered frame to STA after PS POLL"
1928 " (buffer_count=%d)\n", skb_queue_len(&sta
->tx_buf
));
1930 pspoll_send_buffered(local
, sta
, skb
);
1932 if (sta
->flags
& WLAN_STA_PS
) {
1933 /* send only one buffered packet per PS Poll */
1934 /* FIX: should ignore further PS Polls until the
1935 * buffered packet that was just sent is acknowledged
1936 * (Tx or TxExc event) */
1941 if (skb_queue_empty(&sta
->tx_buf
)) {
1942 /* try to clear aid from TIM */
1943 if (!(sta
->flags
& WLAN_STA_TIM
))
1944 PDEBUG(DEBUG_PS2
, "Re-unsetting TIM for aid %d\n",
1946 hostap_set_tim(local
, aid
, 0);
1947 sta
->flags
&= ~WLAN_STA_TIM
;
1950 atomic_dec(&sta
->users
);
1954 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1956 static void handle_wds_oper_queue(struct work_struct
*work
)
1958 struct ap_data
*ap
= container_of(work
, struct ap_data
,
1960 local_info_t
*local
= ap
->local
;
1961 struct wds_oper_data
*entry
, *prev
;
1963 spin_lock_bh(&local
->lock
);
1964 entry
= local
->ap
->wds_oper_entries
;
1965 local
->ap
->wds_oper_entries
= NULL
;
1966 spin_unlock_bh(&local
->lock
);
1969 PDEBUG(DEBUG_AP
, "%s: %s automatic WDS connection "
1970 "to AP " MACSTR
"\n",
1972 entry
->type
== WDS_ADD
? "adding" : "removing",
1973 MAC2STR(entry
->addr
));
1974 if (entry
->type
== WDS_ADD
)
1975 prism2_wds_add(local
, entry
->addr
, 0);
1976 else if (entry
->type
== WDS_DEL
)
1977 prism2_wds_del(local
, entry
->addr
, 0, 1);
1980 entry
= entry
->next
;
1986 /* Called only as a scheduled task for pending AP frames. */
1987 static void handle_beacon(local_info_t
*local
, struct sk_buff
*skb
,
1988 struct hostap_80211_rx_status
*rx_stats
)
1990 struct ieee80211_hdr_4addr
*hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
1991 char *body
= skb
->data
+ IEEE80211_MGMT_HDR_LEN
;
1993 u16
*pos
, beacon_int
, capability
;
1995 unsigned char *supp_rates
= NULL
;
1996 int ssid_len
= 0, supp_rates_len
= 0;
1997 struct sta_info
*sta
= NULL
;
1998 int new_sta
= 0, channel
= -1;
2000 len
= skb
->len
- IEEE80211_MGMT_HDR_LEN
;
2002 if (len
< 8 + 2 + 2) {
2003 printk(KERN_DEBUG
"handle_beacon - too short payload "
2011 /* Timestamp (8 octets) */
2012 pos
+= 4; left
-= 8;
2013 /* Beacon interval (2 octets) */
2014 beacon_int
= __le16_to_cpu(*pos
);
2016 /* Capability information (2 octets) */
2017 capability
= __le16_to_cpu(*pos
);
2020 if (local
->ap
->ap_policy
!= AP_OTHER_AP_EVEN_IBSS
&&
2021 capability
& WLAN_CAPABILITY_IBSS
)
2026 unsigned char *u
= (unsigned char *) pos
;
2028 if (*u
== WLAN_EID_SSID
) {
2033 if (ileft
> left
|| ileft
> MAX_SSID_LEN
) {
2034 PDEBUG(DEBUG_AP
, "SSID: overflow\n");
2038 if (local
->ap
->ap_policy
== AP_OTHER_AP_SAME_SSID
&&
2039 (ileft
!= strlen(local
->essid
) ||
2040 memcmp(local
->essid
, u
, ileft
) != 0)) {
2052 if (*u
== WLAN_EID_SUPP_RATES
) {
2057 if (ileft
> left
|| ileft
== 0 || ileft
> 8) {
2058 PDEBUG(DEBUG_AP
, " - SUPP_RATES len error\n");
2063 supp_rates_len
= ileft
;
2069 if (*u
== WLAN_EID_DS_PARAMS
) {
2074 if (ileft
> left
|| ileft
!= 1) {
2075 PDEBUG(DEBUG_AP
, " - DS_PARAMS len error\n");
2086 spin_lock_bh(&local
->ap
->sta_table_lock
);
2087 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
2089 atomic_inc(&sta
->users
);
2090 spin_unlock_bh(&local
->ap
->sta_table_lock
);
2095 sta
= ap_add_sta(local
->ap
, hdr
->addr2
);
2097 printk(KERN_INFO
"prism2: kmalloc failed for AP "
2098 "data structure\n");
2101 hostap_event_new_sta(local
->dev
, sta
);
2103 /* mark APs authentication and associated for pseudo ad-hoc
2104 * style communication */
2105 sta
->flags
= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
2107 if (local
->ap
->autom_ap_wds
) {
2108 hostap_wds_link_oper(local
, sta
->addr
, WDS_ADD
);
2114 sta
->u
.ap
.ssid_len
= ssid_len
;
2115 memcpy(sta
->u
.ap
.ssid
, ssid
, ssid_len
);
2116 sta
->u
.ap
.ssid
[ssid_len
] = '\0';
2118 sta
->u
.ap
.ssid_len
= 0;
2119 sta
->u
.ap
.ssid
[0] = '\0';
2121 sta
->u
.ap
.channel
= channel
;
2123 sta
->rx_bytes
+= len
;
2124 sta
->u
.ap
.last_beacon
= sta
->last_rx
= jiffies
;
2125 sta
->capability
= capability
;
2126 sta
->listen_interval
= beacon_int
;
2128 atomic_dec(&sta
->users
);
2131 memset(sta
->supported_rates
, 0, sizeof(sta
->supported_rates
));
2132 memcpy(sta
->supported_rates
, supp_rates
, supp_rates_len
);
2133 prism2_check_tx_rates(sta
);
2137 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2140 /* Called only as a tasklet. */
2141 static void handle_ap_item(local_info_t
*local
, struct sk_buff
*skb
,
2142 struct hostap_80211_rx_status
*rx_stats
)
2144 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2145 struct net_device
*dev
= local
->dev
;
2146 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2147 u16 fc
, type
, stype
;
2148 struct ieee80211_hdr_4addr
*hdr
;
2150 /* FIX: should give skb->len to handler functions and check that the
2151 * buffer is long enough */
2152 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
2153 fc
= le16_to_cpu(hdr
->frame_ctl
);
2154 type
= WLAN_FC_GET_TYPE(fc
);
2155 stype
= WLAN_FC_GET_STYPE(fc
);
2157 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2158 if (!local
->hostapd
&& type
== IEEE80211_FTYPE_DATA
) {
2159 PDEBUG(DEBUG_AP
, "handle_ap_item - data frame\n");
2161 if (!(fc
& IEEE80211_FCTL_TODS
) ||
2162 (fc
& IEEE80211_FCTL_FROMDS
)) {
2163 if (stype
== IEEE80211_STYPE_NULLFUNC
) {
2164 /* no ToDS nullfunc seems to be used to check
2165 * AP association; so send reject message to
2166 * speed up re-association */
2167 ap_handle_dropped_data(local
, hdr
);
2170 PDEBUG(DEBUG_AP
, " not ToDS frame (fc=0x%04x)\n",
2175 if (memcmp(hdr
->addr1
, dev
->dev_addr
, ETH_ALEN
)) {
2176 PDEBUG(DEBUG_AP
, "handle_ap_item - addr1(BSSID)="
2177 MACSTR
" not own MAC\n",
2178 MAC2STR(hdr
->addr1
));
2182 if (local
->ap
->nullfunc_ack
&&
2183 stype
== IEEE80211_STYPE_NULLFUNC
)
2184 ap_handle_data_nullfunc(local
, hdr
);
2186 ap_handle_dropped_data(local
, hdr
);
2190 if (type
== IEEE80211_FTYPE_MGMT
&& stype
== IEEE80211_STYPE_BEACON
) {
2191 handle_beacon(local
, skb
, rx_stats
);
2194 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2196 if (type
== IEEE80211_FTYPE_CTL
&& stype
== IEEE80211_STYPE_PSPOLL
) {
2197 handle_pspoll(local
, hdr
, rx_stats
);
2201 if (local
->hostapd
) {
2202 PDEBUG(DEBUG_AP
, "Unknown frame in AP queue: type=0x%02x "
2203 "subtype=0x%02x\n", type
, stype
);
2207 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2208 if (type
!= IEEE80211_FTYPE_MGMT
) {
2209 PDEBUG(DEBUG_AP
, "handle_ap_item - not a management frame?\n");
2213 if (memcmp(hdr
->addr1
, dev
->dev_addr
, ETH_ALEN
)) {
2214 PDEBUG(DEBUG_AP
, "handle_ap_item - addr1(DA)=" MACSTR
2215 " not own MAC\n", MAC2STR(hdr
->addr1
));
2219 if (memcmp(hdr
->addr3
, dev
->dev_addr
, ETH_ALEN
)) {
2220 PDEBUG(DEBUG_AP
, "handle_ap_item - addr3(BSSID)=" MACSTR
2221 " not own MAC\n", MAC2STR(hdr
->addr3
));
2226 case IEEE80211_STYPE_ASSOC_REQ
:
2227 handle_assoc(local
, skb
, rx_stats
, 0);
2229 case IEEE80211_STYPE_ASSOC_RESP
:
2230 PDEBUG(DEBUG_AP
, "==> ASSOC RESP (ignored)\n");
2232 case IEEE80211_STYPE_REASSOC_REQ
:
2233 handle_assoc(local
, skb
, rx_stats
, 1);
2235 case IEEE80211_STYPE_REASSOC_RESP
:
2236 PDEBUG(DEBUG_AP
, "==> REASSOC RESP (ignored)\n");
2238 case IEEE80211_STYPE_ATIM
:
2239 PDEBUG(DEBUG_AP
, "==> ATIM (ignored)\n");
2241 case IEEE80211_STYPE_DISASSOC
:
2242 handle_disassoc(local
, skb
, rx_stats
);
2244 case IEEE80211_STYPE_AUTH
:
2245 handle_authen(local
, skb
, rx_stats
);
2247 case IEEE80211_STYPE_DEAUTH
:
2248 handle_deauth(local
, skb
, rx_stats
);
2251 PDEBUG(DEBUG_AP
, "Unknown mgmt frame subtype 0x%02x\n",
2255 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2262 /* Called only as a tasklet (software IRQ) */
2263 void hostap_rx(struct net_device
*dev
, struct sk_buff
*skb
,
2264 struct hostap_80211_rx_status
*rx_stats
)
2266 struct hostap_interface
*iface
;
2267 local_info_t
*local
;
2269 struct ieee80211_hdr_4addr
*hdr
;
2271 iface
= netdev_priv(dev
);
2272 local
= iface
->local
;
2277 local
->stats
.rx_packets
++;
2279 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
2280 fc
= le16_to_cpu(hdr
->frame_ctl
);
2282 if (local
->ap
->ap_policy
== AP_OTHER_AP_SKIP_ALL
&&
2283 WLAN_FC_GET_TYPE(fc
) == IEEE80211_FTYPE_MGMT
&&
2284 WLAN_FC_GET_STYPE(fc
) == IEEE80211_STYPE_BEACON
)
2287 skb
->protocol
= __constant_htons(ETH_P_HOSTAP
);
2288 handle_ap_item(local
, skb
, rx_stats
);
2296 /* Called only as a tasklet (software IRQ) */
2297 static void schedule_packet_send(local_info_t
*local
, struct sta_info
*sta
)
2299 struct sk_buff
*skb
;
2300 struct ieee80211_hdr_4addr
*hdr
;
2301 struct hostap_80211_rx_status rx_stats
;
2303 if (skb_queue_empty(&sta
->tx_buf
))
2306 skb
= dev_alloc_skb(16);
2308 printk(KERN_DEBUG
"%s: schedule_packet_send: skb alloc "
2309 "failed\n", local
->dev
->name
);
2313 hdr
= (struct ieee80211_hdr_4addr
*) skb_put(skb
, 16);
2315 /* Generate a fake pspoll frame to start packet delivery */
2316 hdr
->frame_ctl
= __constant_cpu_to_le16(
2317 IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
);
2318 memcpy(hdr
->addr1
, local
->dev
->dev_addr
, ETH_ALEN
);
2319 memcpy(hdr
->addr2
, sta
->addr
, ETH_ALEN
);
2320 hdr
->duration_id
= cpu_to_le16(sta
->aid
| BIT(15) | BIT(14));
2322 PDEBUG(DEBUG_PS2
, "%s: Scheduling buffered packet delivery for "
2323 "STA " MACSTR
"\n", local
->dev
->name
, MAC2STR(sta
->addr
));
2325 skb
->dev
= local
->dev
;
2327 memset(&rx_stats
, 0, sizeof(rx_stats
));
2328 hostap_rx(local
->dev
, skb
, &rx_stats
);
2332 int prism2_ap_get_sta_qual(local_info_t
*local
, struct sockaddr addr
[],
2333 struct iw_quality qual
[], int buf_size
,
2336 struct ap_data
*ap
= local
->ap
;
2337 struct list_head
*ptr
;
2340 spin_lock_bh(&ap
->sta_table_lock
);
2342 for (ptr
= ap
->sta_list
.next
; ptr
!= NULL
&& ptr
!= &ap
->sta_list
;
2344 struct sta_info
*sta
= (struct sta_info
*) ptr
;
2346 if (aplist
&& !sta
->ap
)
2348 addr
[count
].sa_family
= ARPHRD_ETHER
;
2349 memcpy(addr
[count
].sa_data
, sta
->addr
, ETH_ALEN
);
2350 if (sta
->last_rx_silence
== 0)
2351 qual
[count
].qual
= sta
->last_rx_signal
< 27 ?
2352 0 : (sta
->last_rx_signal
- 27) * 92 / 127;
2354 qual
[count
].qual
= sta
->last_rx_signal
-
2355 sta
->last_rx_silence
- 35;
2356 qual
[count
].level
= HFA384X_LEVEL_TO_dBm(sta
->last_rx_signal
);
2357 qual
[count
].noise
= HFA384X_LEVEL_TO_dBm(sta
->last_rx_silence
);
2358 qual
[count
].updated
= sta
->last_rx_updated
;
2360 sta
->last_rx_updated
= IW_QUAL_DBM
;
2363 if (count
>= buf_size
)
2366 spin_unlock_bh(&ap
->sta_table_lock
);
2372 /* Translate our list of Access Points & Stations to a card independant
2373 * format that the Wireless Tools will understand - Jean II */
2374 int prism2_ap_translate_scan(struct net_device
*dev
, char *buffer
)
2376 struct hostap_interface
*iface
;
2377 local_info_t
*local
;
2379 struct list_head
*ptr
;
2380 struct iw_event iwe
;
2381 char *current_ev
= buffer
;
2382 char *end_buf
= buffer
+ IW_SCAN_MAX_DATA
;
2383 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2387 iface
= netdev_priv(dev
);
2388 local
= iface
->local
;
2391 spin_lock_bh(&ap
->sta_table_lock
);
2393 for (ptr
= ap
->sta_list
.next
; ptr
!= NULL
&& ptr
!= &ap
->sta_list
;
2395 struct sta_info
*sta
= (struct sta_info
*) ptr
;
2397 /* First entry *MUST* be the AP MAC address */
2398 memset(&iwe
, 0, sizeof(iwe
));
2399 iwe
.cmd
= SIOCGIWAP
;
2400 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
2401 memcpy(iwe
.u
.ap_addr
.sa_data
, sta
->addr
, ETH_ALEN
);
2402 iwe
.len
= IW_EV_ADDR_LEN
;
2403 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2406 /* Use the mode to indicate if it's a station or
2407 * an Access Point */
2408 memset(&iwe
, 0, sizeof(iwe
));
2409 iwe
.cmd
= SIOCGIWMODE
;
2411 iwe
.u
.mode
= IW_MODE_MASTER
;
2413 iwe
.u
.mode
= IW_MODE_INFRA
;
2414 iwe
.len
= IW_EV_UINT_LEN
;
2415 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2419 memset(&iwe
, 0, sizeof(iwe
));
2421 if (sta
->last_rx_silence
== 0)
2422 iwe
.u
.qual
.qual
= sta
->last_rx_signal
< 27 ?
2423 0 : (sta
->last_rx_signal
- 27) * 92 / 127;
2425 iwe
.u
.qual
.qual
= sta
->last_rx_signal
-
2426 sta
->last_rx_silence
- 35;
2427 iwe
.u
.qual
.level
= HFA384X_LEVEL_TO_dBm(sta
->last_rx_signal
);
2428 iwe
.u
.qual
.noise
= HFA384X_LEVEL_TO_dBm(sta
->last_rx_silence
);
2429 iwe
.u
.qual
.updated
= sta
->last_rx_updated
;
2430 iwe
.len
= IW_EV_QUAL_LEN
;
2431 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2434 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2436 memset(&iwe
, 0, sizeof(iwe
));
2437 iwe
.cmd
= SIOCGIWESSID
;
2438 iwe
.u
.data
.length
= sta
->u
.ap
.ssid_len
;
2439 iwe
.u
.data
.flags
= 1;
2440 current_ev
= iwe_stream_add_point(current_ev
, end_buf
,
2444 memset(&iwe
, 0, sizeof(iwe
));
2445 iwe
.cmd
= SIOCGIWENCODE
;
2446 if (sta
->capability
& WLAN_CAPABILITY_PRIVACY
)
2448 IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
2450 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
2451 current_ev
= iwe_stream_add_point(current_ev
, end_buf
,
2454 /* 0 byte memcpy */);
2456 if (sta
->u
.ap
.channel
> 0 &&
2457 sta
->u
.ap
.channel
<= FREQ_COUNT
) {
2458 memset(&iwe
, 0, sizeof(iwe
));
2459 iwe
.cmd
= SIOCGIWFREQ
;
2460 iwe
.u
.freq
.m
= freq_list
[sta
->u
.ap
.channel
- 1]
2463 current_ev
= iwe_stream_add_event(
2464 current_ev
, end_buf
, &iwe
,
2468 memset(&iwe
, 0, sizeof(iwe
));
2469 iwe
.cmd
= IWEVCUSTOM
;
2470 sprintf(buf
, "beacon_interval=%d",
2471 sta
->listen_interval
);
2472 iwe
.u
.data
.length
= strlen(buf
);
2473 current_ev
= iwe_stream_add_point(current_ev
, end_buf
,
2476 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2478 sta
->last_rx_updated
= IW_QUAL_DBM
;
2480 /* To be continued, we should make good use of IWEVCUSTOM */
2483 spin_unlock_bh(&ap
->sta_table_lock
);
2485 return current_ev
- buffer
;
2489 static int prism2_hostapd_add_sta(struct ap_data
*ap
,
2490 struct prism2_hostapd_param
*param
)
2492 struct sta_info
*sta
;
2494 spin_lock_bh(&ap
->sta_table_lock
);
2495 sta
= ap_get_sta(ap
, param
->sta_addr
);
2497 atomic_inc(&sta
->users
);
2498 spin_unlock_bh(&ap
->sta_table_lock
);
2501 sta
= ap_add_sta(ap
, param
->sta_addr
);
2506 if (!(sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
&& sta
->local
)
2507 hostap_event_new_sta(sta
->local
->dev
, sta
);
2509 sta
->flags
|= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
2510 sta
->last_rx
= jiffies
;
2511 sta
->aid
= param
->u
.add_sta
.aid
;
2512 sta
->capability
= param
->u
.add_sta
.capability
;
2513 sta
->tx_supp_rates
= param
->u
.add_sta
.tx_supp_rates
;
2514 if (sta
->tx_supp_rates
& WLAN_RATE_1M
)
2515 sta
->supported_rates
[0] = 2;
2516 if (sta
->tx_supp_rates
& WLAN_RATE_2M
)
2517 sta
->supported_rates
[1] = 4;
2518 if (sta
->tx_supp_rates
& WLAN_RATE_5M5
)
2519 sta
->supported_rates
[2] = 11;
2520 if (sta
->tx_supp_rates
& WLAN_RATE_11M
)
2521 sta
->supported_rates
[3] = 22;
2522 prism2_check_tx_rates(sta
);
2523 atomic_dec(&sta
->users
);
2528 static int prism2_hostapd_remove_sta(struct ap_data
*ap
,
2529 struct prism2_hostapd_param
*param
)
2531 struct sta_info
*sta
;
2533 spin_lock_bh(&ap
->sta_table_lock
);
2534 sta
= ap_get_sta(ap
, param
->sta_addr
);
2536 ap_sta_hash_del(ap
, sta
);
2537 list_del(&sta
->list
);
2539 spin_unlock_bh(&ap
->sta_table_lock
);
2544 if ((sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
&& sta
->local
)
2545 hostap_event_expired_sta(sta
->local
->dev
, sta
);
2546 ap_free_sta(ap
, sta
);
2552 static int prism2_hostapd_get_info_sta(struct ap_data
*ap
,
2553 struct prism2_hostapd_param
*param
)
2555 struct sta_info
*sta
;
2557 spin_lock_bh(&ap
->sta_table_lock
);
2558 sta
= ap_get_sta(ap
, param
->sta_addr
);
2560 atomic_inc(&sta
->users
);
2561 spin_unlock_bh(&ap
->sta_table_lock
);
2566 param
->u
.get_info_sta
.inactive_sec
= (jiffies
- sta
->last_rx
) / HZ
;
2568 atomic_dec(&sta
->users
);
2574 static int prism2_hostapd_set_flags_sta(struct ap_data
*ap
,
2575 struct prism2_hostapd_param
*param
)
2577 struct sta_info
*sta
;
2579 spin_lock_bh(&ap
->sta_table_lock
);
2580 sta
= ap_get_sta(ap
, param
->sta_addr
);
2582 sta
->flags
|= param
->u
.set_flags_sta
.flags_or
;
2583 sta
->flags
&= param
->u
.set_flags_sta
.flags_and
;
2585 spin_unlock_bh(&ap
->sta_table_lock
);
2594 static int prism2_hostapd_sta_clear_stats(struct ap_data
*ap
,
2595 struct prism2_hostapd_param
*param
)
2597 struct sta_info
*sta
;
2600 spin_lock_bh(&ap
->sta_table_lock
);
2601 sta
= ap_get_sta(ap
, param
->sta_addr
);
2603 sta
->rx_packets
= sta
->tx_packets
= 0;
2604 sta
->rx_bytes
= sta
->tx_bytes
= 0;
2605 for (rate
= 0; rate
< WLAN_RATE_COUNT
; rate
++) {
2606 sta
->tx_count
[rate
] = 0;
2607 sta
->rx_count
[rate
] = 0;
2610 spin_unlock_bh(&ap
->sta_table_lock
);
2619 int prism2_hostapd(struct ap_data
*ap
, struct prism2_hostapd_param
*param
)
2621 switch (param
->cmd
) {
2622 case PRISM2_HOSTAPD_FLUSH
:
2623 ap_control_kickall(ap
);
2625 case PRISM2_HOSTAPD_ADD_STA
:
2626 return prism2_hostapd_add_sta(ap
, param
);
2627 case PRISM2_HOSTAPD_REMOVE_STA
:
2628 return prism2_hostapd_remove_sta(ap
, param
);
2629 case PRISM2_HOSTAPD_GET_INFO_STA
:
2630 return prism2_hostapd_get_info_sta(ap
, param
);
2631 case PRISM2_HOSTAPD_SET_FLAGS_STA
:
2632 return prism2_hostapd_set_flags_sta(ap
, param
);
2633 case PRISM2_HOSTAPD_STA_CLEAR_STATS
:
2634 return prism2_hostapd_sta_clear_stats(ap
, param
);
2636 printk(KERN_WARNING
"prism2_hostapd: unknown cmd=%d\n",
2643 /* Update station info for host-based TX rate control and return current
2645 static int ap_update_sta_tx_rate(struct sta_info
*sta
, struct net_device
*dev
)
2647 int ret
= sta
->tx_rate
;
2648 struct hostap_interface
*iface
;
2649 local_info_t
*local
;
2651 iface
= netdev_priv(dev
);
2652 local
= iface
->local
;
2654 sta
->tx_count
[sta
->tx_rate_idx
]++;
2655 sta
->tx_since_last_failure
++;
2656 sta
->tx_consecutive_exc
= 0;
2657 if (sta
->tx_since_last_failure
>= WLAN_RATE_UPDATE_COUNT
&&
2658 sta
->tx_rate_idx
< sta
->tx_max_rate
) {
2659 /* use next higher rate */
2660 int old_rate
, new_rate
;
2661 old_rate
= new_rate
= sta
->tx_rate_idx
;
2662 while (new_rate
< sta
->tx_max_rate
) {
2664 if (ap_tx_rate_ok(new_rate
, sta
, local
)) {
2665 sta
->tx_rate_idx
= new_rate
;
2669 if (old_rate
!= sta
->tx_rate_idx
) {
2670 switch (sta
->tx_rate_idx
) {
2671 case 0: sta
->tx_rate
= 10; break;
2672 case 1: sta
->tx_rate
= 20; break;
2673 case 2: sta
->tx_rate
= 55; break;
2674 case 3: sta
->tx_rate
= 110; break;
2675 default: sta
->tx_rate
= 0; break;
2677 PDEBUG(DEBUG_AP
, "%s: STA " MACSTR
" TX rate raised to"
2678 " %d\n", dev
->name
, MAC2STR(sta
->addr
),
2681 sta
->tx_since_last_failure
= 0;
2688 /* Called only from software IRQ. Called for each TX frame prior possible
2689 * encryption and transmit. */
2690 ap_tx_ret
hostap_handle_sta_tx(local_info_t
*local
, struct hostap_tx_data
*tx
)
2692 struct sta_info
*sta
= NULL
;
2693 struct sk_buff
*skb
= tx
->skb
;
2695 struct ieee80211_hdr_4addr
*hdr
;
2696 struct hostap_skb_tx_data
*meta
;
2698 meta
= (struct hostap_skb_tx_data
*) skb
->cb
;
2699 ret
= AP_TX_CONTINUE
;
2700 if (local
->ap
== NULL
|| skb
->len
< 10 ||
2701 meta
->iface
->type
== HOSTAP_INTERFACE_STA
)
2704 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
2706 if (hdr
->addr1
[0] & 0x01) {
2707 /* broadcast/multicast frame - no AP related processing */
2711 /* unicast packet - check whether destination STA is associated */
2712 spin_lock(&local
->ap
->sta_table_lock
);
2713 sta
= ap_get_sta(local
->ap
, hdr
->addr1
);
2715 atomic_inc(&sta
->users
);
2716 spin_unlock(&local
->ap
->sta_table_lock
);
2718 if (local
->iw_mode
== IW_MODE_MASTER
&& sta
== NULL
&&
2719 !(meta
->flags
& HOSTAP_TX_FLAGS_WDS
) &&
2720 meta
->iface
->type
!= HOSTAP_INTERFACE_MASTER
&&
2721 meta
->iface
->type
!= HOSTAP_INTERFACE_AP
) {
2723 /* This can happen, e.g., when wlan0 is added to a bridge and
2724 * bridging code does not know which port is the correct target
2725 * for a unicast frame. In this case, the packet is send to all
2726 * ports of the bridge. Since this is a valid scenario, do not
2727 * print out any errors here. */
2728 if (net_ratelimit()) {
2729 printk(KERN_DEBUG
"AP: drop packet to non-associated "
2730 "STA " MACSTR
"\n", MAC2STR(hdr
->addr1
));
2733 local
->ap
->tx_drop_nonassoc
++;
2741 if (!(sta
->flags
& WLAN_STA_AUTHORIZED
))
2742 ret
= AP_TX_CONTINUE_NOT_AUTHORIZED
;
2744 /* Set tx_rate if using host-based TX rate control */
2745 if (!local
->fw_tx_rate_control
)
2746 local
->ap
->last_tx_rate
= meta
->rate
=
2747 ap_update_sta_tx_rate(sta
, local
->dev
);
2749 if (local
->iw_mode
!= IW_MODE_MASTER
)
2752 if (!(sta
->flags
& WLAN_STA_PS
))
2755 if (meta
->flags
& HOSTAP_TX_FLAGS_ADD_MOREDATA
) {
2756 /* indicate to STA that more frames follow */
2758 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2761 if (meta
->flags
& HOSTAP_TX_FLAGS_BUFFERED_FRAME
) {
2762 /* packet was already buffered and now send due to
2763 * PS poll, so do not rebuffer it */
2767 if (skb_queue_len(&sta
->tx_buf
) >= STA_MAX_TX_BUFFER
) {
2768 PDEBUG(DEBUG_PS
, "%s: No more space in STA (" MACSTR
")'s PS "
2769 "mode buffer\n", local
->dev
->name
, MAC2STR(sta
->addr
));
2770 /* Make sure that TIM is set for the station (it might not be
2771 * after AP wlan hw reset). */
2772 /* FIX: should fix hw reset to restore bits based on STA
2774 hostap_set_tim(local
, sta
->aid
, 1);
2775 sta
->flags
|= WLAN_STA_TIM
;
2780 /* STA in PS mode, buffer frame for later delivery */
2781 set_tim
= skb_queue_empty(&sta
->tx_buf
);
2782 skb_queue_tail(&sta
->tx_buf
, skb
);
2783 /* FIX: could save RX time to skb and expire buffered frames after
2784 * some time if STA does not poll for them */
2787 if (sta
->flags
& WLAN_STA_TIM
)
2788 PDEBUG(DEBUG_PS2
, "Re-setting TIM for aid %d\n",
2790 hostap_set_tim(local
, sta
->aid
, 1);
2791 sta
->flags
|= WLAN_STA_TIM
;
2794 ret
= AP_TX_BUFFERED
;
2798 if (ret
== AP_TX_CONTINUE
||
2799 ret
== AP_TX_CONTINUE_NOT_AUTHORIZED
) {
2801 sta
->tx_bytes
+= skb
->len
;
2802 sta
->last_tx
= jiffies
;
2805 if ((ret
== AP_TX_CONTINUE
||
2806 ret
== AP_TX_CONTINUE_NOT_AUTHORIZED
) &&
2807 sta
->crypt
&& tx
->host_encrypt
) {
2808 tx
->crypt
= sta
->crypt
;
2809 tx
->sta_ptr
= sta
; /* hostap_handle_sta_release() will
2810 * be called to release sta info
2813 atomic_dec(&sta
->users
);
2820 void hostap_handle_sta_release(void *ptr
)
2822 struct sta_info
*sta
= ptr
;
2823 atomic_dec(&sta
->users
);
2827 /* Called only as a tasklet (software IRQ) */
2828 void hostap_handle_sta_tx_exc(local_info_t
*local
, struct sk_buff
*skb
)
2830 struct sta_info
*sta
;
2831 struct ieee80211_hdr_4addr
*hdr
;
2832 struct hostap_skb_tx_data
*meta
;
2834 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
2835 meta
= (struct hostap_skb_tx_data
*) skb
->cb
;
2837 spin_lock(&local
->ap
->sta_table_lock
);
2838 sta
= ap_get_sta(local
->ap
, hdr
->addr1
);
2840 spin_unlock(&local
->ap
->sta_table_lock
);
2841 PDEBUG(DEBUG_AP
, "%s: Could not find STA " MACSTR
" for this "
2842 "TX error (@%lu)\n",
2843 local
->dev
->name
, MAC2STR(hdr
->addr1
), jiffies
);
2847 sta
->tx_since_last_failure
= 0;
2848 sta
->tx_consecutive_exc
++;
2850 if (sta
->tx_consecutive_exc
>= WLAN_RATE_DECREASE_THRESHOLD
&&
2851 sta
->tx_rate_idx
> 0 && meta
->rate
<= sta
->tx_rate
) {
2852 /* use next lower rate */
2854 old
= rate
= sta
->tx_rate_idx
;
2857 if (ap_tx_rate_ok(rate
, sta
, local
)) {
2858 sta
->tx_rate_idx
= rate
;
2862 if (old
!= sta
->tx_rate_idx
) {
2863 switch (sta
->tx_rate_idx
) {
2864 case 0: sta
->tx_rate
= 10; break;
2865 case 1: sta
->tx_rate
= 20; break;
2866 case 2: sta
->tx_rate
= 55; break;
2867 case 3: sta
->tx_rate
= 110; break;
2868 default: sta
->tx_rate
= 0; break;
2870 PDEBUG(DEBUG_AP
, "%s: STA " MACSTR
" TX rate lowered "
2871 "to %d\n", local
->dev
->name
, MAC2STR(sta
->addr
),
2874 sta
->tx_consecutive_exc
= 0;
2876 spin_unlock(&local
->ap
->sta_table_lock
);
2880 static void hostap_update_sta_ps2(local_info_t
*local
, struct sta_info
*sta
,
2881 int pwrmgt
, int type
, int stype
)
2883 if (pwrmgt
&& !(sta
->flags
& WLAN_STA_PS
)) {
2884 sta
->flags
|= WLAN_STA_PS
;
2885 PDEBUG(DEBUG_PS2
, "STA " MACSTR
" changed to use PS "
2886 "mode (type=0x%02X, stype=0x%02X)\n",
2887 MAC2STR(sta
->addr
), type
>> 2, stype
>> 4);
2888 } else if (!pwrmgt
&& (sta
->flags
& WLAN_STA_PS
)) {
2889 sta
->flags
&= ~WLAN_STA_PS
;
2890 PDEBUG(DEBUG_PS2
, "STA " MACSTR
" changed to not use "
2891 "PS mode (type=0x%02X, stype=0x%02X)\n",
2892 MAC2STR(sta
->addr
), type
>> 2, stype
>> 4);
2893 if (type
!= IEEE80211_FTYPE_CTL
||
2894 stype
!= IEEE80211_STYPE_PSPOLL
)
2895 schedule_packet_send(local
, sta
);
2900 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2901 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
2902 int hostap_update_sta_ps(local_info_t
*local
, struct ieee80211_hdr_4addr
*hdr
)
2904 struct sta_info
*sta
;
2907 spin_lock(&local
->ap
->sta_table_lock
);
2908 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
2910 atomic_inc(&sta
->users
);
2911 spin_unlock(&local
->ap
->sta_table_lock
);
2916 fc
= le16_to_cpu(hdr
->frame_ctl
);
2917 hostap_update_sta_ps2(local
, sta
, fc
& IEEE80211_FCTL_PM
,
2918 WLAN_FC_GET_TYPE(fc
), WLAN_FC_GET_STYPE(fc
));
2920 atomic_dec(&sta
->users
);
2925 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2926 * getting RX header and payload from hardware. */
2927 ap_rx_ret
hostap_handle_sta_rx(local_info_t
*local
, struct net_device
*dev
,
2928 struct sk_buff
*skb
,
2929 struct hostap_80211_rx_status
*rx_stats
,
2933 struct sta_info
*sta
;
2934 u16 fc
, type
, stype
;
2935 struct ieee80211_hdr_4addr
*hdr
;
2937 if (local
->ap
== NULL
)
2938 return AP_RX_CONTINUE
;
2940 hdr
= (struct ieee80211_hdr_4addr
*) skb
->data
;
2942 fc
= le16_to_cpu(hdr
->frame_ctl
);
2943 type
= WLAN_FC_GET_TYPE(fc
);
2944 stype
= WLAN_FC_GET_STYPE(fc
);
2946 spin_lock(&local
->ap
->sta_table_lock
);
2947 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
2949 atomic_inc(&sta
->users
);
2950 spin_unlock(&local
->ap
->sta_table_lock
);
2952 if (sta
&& !(sta
->flags
& WLAN_STA_AUTHORIZED
))
2953 ret
= AP_RX_CONTINUE_NOT_AUTHORIZED
;
2955 ret
= AP_RX_CONTINUE
;
2958 if (fc
& IEEE80211_FCTL_TODS
) {
2959 if (!wds
&& (sta
== NULL
|| !(sta
->flags
& WLAN_STA_ASSOC
))) {
2960 if (local
->hostapd
) {
2961 prism2_rx_80211(local
->apdev
, skb
, rx_stats
,
2962 PRISM2_RX_NON_ASSOC
);
2963 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2965 printk(KERN_DEBUG
"%s: dropped received packet"
2966 " from non-associated STA " MACSTR
2967 " (type=0x%02x, subtype=0x%02x)\n",
2968 dev
->name
, MAC2STR(hdr
->addr2
),
2969 type
>> 2, stype
>> 4);
2970 hostap_rx(dev
, skb
, rx_stats
);
2971 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2976 } else if (fc
& IEEE80211_FCTL_FROMDS
) {
2978 /* FromDS frame - not for us; probably
2979 * broadcast/multicast in another BSS - drop */
2980 if (memcmp(hdr
->addr1
, dev
->dev_addr
, ETH_ALEN
) == 0) {
2981 printk(KERN_DEBUG
"Odd.. FromDS packet "
2982 "received with own BSSID\n");
2983 hostap_dump_rx_80211(dev
->name
, skb
, rx_stats
);
2988 } else if (stype
== IEEE80211_STYPE_NULLFUNC
&& sta
== NULL
&&
2989 memcmp(hdr
->addr1
, dev
->dev_addr
, ETH_ALEN
) == 0) {
2991 if (local
->hostapd
) {
2992 prism2_rx_80211(local
->apdev
, skb
, rx_stats
,
2993 PRISM2_RX_NON_ASSOC
);
2994 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2996 /* At least Lucent f/w seems to send data::nullfunc
2997 * frames with no ToDS flag when the current AP returns
2998 * after being unavailable for some time. Speed up
2999 * re-association by informing the station about it not
3000 * being associated. */
3001 printk(KERN_DEBUG
"%s: rejected received nullfunc "
3002 "frame without ToDS from not associated STA "
3004 dev
->name
, MAC2STR(hdr
->addr2
));
3005 hostap_rx(dev
, skb
, rx_stats
);
3006 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3010 } else if (stype
== IEEE80211_STYPE_NULLFUNC
) {
3011 /* At least Lucent cards seem to send periodic nullfunc
3012 * frames with ToDS. Let these through to update SQ
3013 * stats and PS state. Nullfunc frames do not contain
3014 * any data and they will be dropped below. */
3016 /* If BSSID (Addr3) is foreign, this frame is a normal
3017 * broadcast frame from an IBSS network. Drop it silently.
3018 * If BSSID is own, report the dropping of this frame. */
3019 if (memcmp(hdr
->addr3
, dev
->dev_addr
, ETH_ALEN
) == 0) {
3020 printk(KERN_DEBUG
"%s: dropped received packet from "
3021 MACSTR
" with no ToDS flag (type=0x%02x, "
3022 "subtype=0x%02x)\n", dev
->name
,
3023 MAC2STR(hdr
->addr2
), type
>> 2, stype
>> 4);
3024 hostap_dump_rx_80211(dev
->name
, skb
, rx_stats
);
3031 hostap_update_sta_ps2(local
, sta
, fc
& IEEE80211_FCTL_PM
,
3035 sta
->rx_bytes
+= skb
->len
;
3036 sta
->last_rx
= jiffies
;
3039 if (local
->ap
->nullfunc_ack
&& stype
== IEEE80211_STYPE_NULLFUNC
&&
3040 fc
& IEEE80211_FCTL_TODS
) {
3041 if (local
->hostapd
) {
3042 prism2_rx_80211(local
->apdev
, skb
, rx_stats
,
3043 PRISM2_RX_NULLFUNC_ACK
);
3044 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3046 /* some STA f/w's seem to require control::ACK frame
3047 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3048 * from Compaq) does not send this.. Try to generate
3049 * ACK for these frames from the host driver to make
3050 * power saving work with, e.g., Lucent WaveLAN f/w */
3051 hostap_rx(dev
, skb
, rx_stats
);
3052 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3060 atomic_dec(&sta
->users
);
3066 /* Called only as a tasklet (software IRQ) */
3067 int hostap_handle_sta_crypto(local_info_t
*local
,
3068 struct ieee80211_hdr_4addr
*hdr
,
3069 struct ieee80211_crypt_data
**crypt
,
3072 struct sta_info
*sta
;
3074 spin_lock(&local
->ap
->sta_table_lock
);
3075 sta
= ap_get_sta(local
->ap
, hdr
->addr2
);
3077 atomic_inc(&sta
->users
);
3078 spin_unlock(&local
->ap
->sta_table_lock
);
3084 *crypt
= sta
->crypt
;
3086 /* hostap_handle_sta_release() will be called to release STA
3089 atomic_dec(&sta
->users
);
3095 /* Called only as a tasklet (software IRQ) */
3096 int hostap_is_sta_assoc(struct ap_data
*ap
, u8
*sta_addr
)
3098 struct sta_info
*sta
;
3101 spin_lock(&ap
->sta_table_lock
);
3102 sta
= ap_get_sta(ap
, sta_addr
);
3103 if (sta
!= NULL
&& (sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
)
3105 spin_unlock(&ap
->sta_table_lock
);
3111 /* Called only as a tasklet (software IRQ) */
3112 int hostap_is_sta_authorized(struct ap_data
*ap
, u8
*sta_addr
)
3114 struct sta_info
*sta
;
3117 spin_lock(&ap
->sta_table_lock
);
3118 sta
= ap_get_sta(ap
, sta_addr
);
3119 if (sta
!= NULL
&& (sta
->flags
& WLAN_STA_ASSOC
) && !sta
->ap
&&
3120 ((sta
->flags
& WLAN_STA_AUTHORIZED
) ||
3121 ap
->local
->ieee_802_1x
== 0))
3123 spin_unlock(&ap
->sta_table_lock
);
3129 /* Called only as a tasklet (software IRQ) */
3130 int hostap_add_sta(struct ap_data
*ap
, u8
*sta_addr
)
3132 struct sta_info
*sta
;
3138 spin_lock(&ap
->sta_table_lock
);
3139 sta
= ap_get_sta(ap
, sta_addr
);
3142 spin_unlock(&ap
->sta_table_lock
);
3145 sta
= ap_add_sta(ap
, sta_addr
);
3148 sta
->flags
= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
3150 memset(sta
->supported_rates
, 0, sizeof(sta
->supported_rates
));
3151 /* No way of knowing which rates are supported since we did not
3152 * get supported rates element from beacon/assoc req. Assume
3153 * that remote end supports all 802.11b rates. */
3154 sta
->supported_rates
[0] = 0x82;
3155 sta
->supported_rates
[1] = 0x84;
3156 sta
->supported_rates
[2] = 0x0b;
3157 sta
->supported_rates
[3] = 0x16;
3158 sta
->tx_supp_rates
= WLAN_RATE_1M
| WLAN_RATE_2M
|
3159 WLAN_RATE_5M5
| WLAN_RATE_11M
;
3161 sta
->tx_max_rate
= sta
->tx_rate_idx
= 3;
3168 /* Called only as a tasklet (software IRQ) */
3169 int hostap_update_rx_stats(struct ap_data
*ap
,
3170 struct ieee80211_hdr_4addr
*hdr
,
3171 struct hostap_80211_rx_status
*rx_stats
)
3173 struct sta_info
*sta
;
3178 spin_lock(&ap
->sta_table_lock
);
3179 sta
= ap_get_sta(ap
, hdr
->addr2
);
3181 sta
->last_rx_silence
= rx_stats
->noise
;
3182 sta
->last_rx_signal
= rx_stats
->signal
;
3183 sta
->last_rx_rate
= rx_stats
->rate
;
3184 sta
->last_rx_updated
= IW_QUAL_ALL_UPDATED
| IW_QUAL_DBM
;
3185 if (rx_stats
->rate
== 10)
3187 else if (rx_stats
->rate
== 20)
3189 else if (rx_stats
->rate
== 55)
3191 else if (rx_stats
->rate
== 110)
3194 spin_unlock(&ap
->sta_table_lock
);
3196 return sta
? 0 : -1;
3200 void hostap_update_rates(local_info_t
*local
)
3202 struct list_head
*ptr
;
3203 struct ap_data
*ap
= local
->ap
;
3208 spin_lock_bh(&ap
->sta_table_lock
);
3209 for (ptr
= ap
->sta_list
.next
; ptr
!= &ap
->sta_list
; ptr
= ptr
->next
) {
3210 struct sta_info
*sta
= (struct sta_info
*) ptr
;
3211 prism2_check_tx_rates(sta
);
3213 spin_unlock_bh(&ap
->sta_table_lock
);
3217 void * ap_crypt_get_ptrs(struct ap_data
*ap
, u8
*addr
, int permanent
,
3218 struct ieee80211_crypt_data
***crypt
)
3220 struct sta_info
*sta
;
3222 spin_lock_bh(&ap
->sta_table_lock
);
3223 sta
= ap_get_sta(ap
, addr
);
3225 atomic_inc(&sta
->users
);
3226 spin_unlock_bh(&ap
->sta_table_lock
);
3228 if (!sta
&& permanent
)
3229 sta
= ap_add_sta(ap
, addr
);
3235 sta
->flags
|= WLAN_STA_PERM
;
3237 *crypt
= &sta
->crypt
;
3243 void hostap_add_wds_links(local_info_t
*local
)
3245 struct ap_data
*ap
= local
->ap
;
3246 struct list_head
*ptr
;
3248 spin_lock_bh(&ap
->sta_table_lock
);
3249 list_for_each(ptr
, &ap
->sta_list
) {
3250 struct sta_info
*sta
= list_entry(ptr
, struct sta_info
, list
);
3252 hostap_wds_link_oper(local
, sta
->addr
, WDS_ADD
);
3254 spin_unlock_bh(&ap
->sta_table_lock
);
3256 schedule_work(&local
->ap
->wds_oper_queue
);
3260 void hostap_wds_link_oper(local_info_t
*local
, u8
*addr
, wds_oper_type type
)
3262 struct wds_oper_data
*entry
;
3264 entry
= kmalloc(sizeof(*entry
), GFP_ATOMIC
);
3267 memcpy(entry
->addr
, addr
, ETH_ALEN
);
3269 spin_lock_bh(&local
->lock
);
3270 entry
->next
= local
->ap
->wds_oper_entries
;
3271 local
->ap
->wds_oper_entries
= entry
;
3272 spin_unlock_bh(&local
->lock
);
3274 schedule_work(&local
->ap
->wds_oper_queue
);
3278 EXPORT_SYMBOL(hostap_init_data
);
3279 EXPORT_SYMBOL(hostap_init_ap_proc
);
3280 EXPORT_SYMBOL(hostap_free_data
);
3281 EXPORT_SYMBOL(hostap_check_sta_fw_version
);
3282 EXPORT_SYMBOL(hostap_handle_sta_tx_exc
);
3283 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3284 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */