2 * hostapd / Callback functions for driver wrappers
3 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
20 #include "ieee802_11.h"
21 #include "radius/radius.h"
23 #include "accounting.h"
24 #include "tkip_countermeasures.h"
25 #include "ieee802_1x.h"
29 #include "wps_hostapd.h"
33 struct hostapd_data
*hapd
;
37 static int prune_associations(struct hostapd_iface
*iface
, void *ctx
)
39 struct prune_data
*data
= ctx
;
40 struct sta_info
*osta
;
41 struct hostapd_data
*ohapd
;
44 for (j
= 0; j
< iface
->num_bss
; j
++) {
45 ohapd
= iface
->bss
[j
];
46 if (ohapd
== data
->hapd
)
48 osta
= ap_get_sta(ohapd
, data
->addr
);
52 ap_sta_disassociate(ohapd
, osta
, WLAN_REASON_UNSPECIFIED
);
59 * hostapd_prune_associations - Remove extraneous associations
60 * @hapd: Pointer to BSS data for the most recent association
61 * @sta: Pointer to the associated STA data
63 * This function looks through all radios and BSS's for previous
64 * (stale) associations of STA. If any are found they are removed.
66 static void hostapd_prune_associations(struct hostapd_data
*hapd
,
69 struct prune_data data
;
71 data
.addr
= sta
->addr
;
72 hostapd_for_each_interface(prune_associations
, &data
);
77 * hostapd_new_assoc_sta - Notify that a new station associated with the AP
78 * @hapd: Pointer to BSS data
79 * @sta: Pointer to the associated STA data
80 * @reassoc: 1 to indicate this was a re-association; 0 = first association
82 * This function will be called whenever a station associates with the AP. It
83 * can be called from ieee802_11.c for drivers that export MLME to hostapd and
84 * from driver_*.c for drivers that take care of management frames (IEEE 802.11
85 * authentication and association) internally.
87 void hostapd_new_assoc_sta(struct hostapd_data
*hapd
, struct sta_info
*sta
,
90 if (hapd
->tkip_countermeasures
) {
91 hostapd_sta_deauth(hapd
, sta
->addr
,
92 WLAN_REASON_MICHAEL_MIC_FAILURE
);
96 hostapd_prune_associations(hapd
, sta
);
98 /* IEEE 802.11F (IAPP) */
99 if (hapd
->conf
->ieee802_11f
)
100 iapp_new_station(hapd
->iapp
, sta
);
102 /* Start accounting here, if IEEE 802.1X and WPA are not used.
103 * IEEE 802.1X/WPA code will start accounting after the station has
104 * been authorized. */
105 if (!hapd
->conf
->ieee802_1x
&& !hapd
->conf
->wpa
)
106 accounting_sta_start(hapd
, sta
);
108 /* Start IEEE 802.1X authentication process for new stations */
109 ieee802_1x_new_station(hapd
, sta
);
111 if (sta
->auth_alg
!= WLAN_AUTH_FT
&&
112 !(sta
->flags
& (WLAN_STA_WPS
| WLAN_STA_MAYBE_WPS
)))
113 wpa_auth_sm_event(sta
->wpa_sm
, WPA_REAUTH
);
115 wpa_auth_sta_associated(hapd
->wpa_auth
, sta
->wpa_sm
);
119 int hostapd_notif_new_sta(struct hostapd_data
*hapd
, const u8
*addr
)
121 struct sta_info
*sta
= ap_get_sta(hapd
, addr
);
125 wpa_printf(MSG_DEBUG
, "Data frame from unknown STA " MACSTR
126 " - adding a new STA", MAC2STR(addr
));
127 sta
= ap_sta_add(hapd
, addr
);
129 hostapd_new_assoc_sta(hapd
, sta
, 0);
131 wpa_printf(MSG_DEBUG
, "Failed to add STA entry for " MACSTR
,
140 int hostapd_notif_assoc(struct hostapd_data
*hapd
, const u8
*addr
,
141 const u8
*ie
, size_t ielen
)
143 struct sta_info
*sta
;
146 hostapd_logger(hapd
, addr
, HOSTAPD_MODULE_IEEE80211
,
147 HOSTAPD_LEVEL_INFO
, "associated");
149 sta
= ap_get_sta(hapd
, addr
);
151 accounting_sta_stop(hapd
, sta
);
153 sta
= ap_sta_add(hapd
, addr
);
157 sta
->flags
&= ~(WLAN_STA_WPS
| WLAN_STA_MAYBE_WPS
);
159 if (hapd
->conf
->wpa
) {
160 if (ie
== NULL
|| ielen
== 0) {
161 if (hapd
->conf
->wps_state
) {
162 wpa_printf(MSG_DEBUG
, "STA did not include "
163 "WPA/RSN IE in (Re)Association "
164 "Request - possible WPS use");
165 sta
->flags
|= WLAN_STA_MAYBE_WPS
;
169 wpa_printf(MSG_DEBUG
, "No WPA/RSN IE from STA");
172 if (hapd
->conf
->wps_state
&& ie
[0] == 0xdd && ie
[1] >= 4 &&
173 os_memcmp(ie
+ 2, "\x00\x50\xf2\x04", 4) == 0) {
174 sta
->flags
|= WLAN_STA_WPS
;
178 if (sta
->wpa_sm
== NULL
)
179 sta
->wpa_sm
= wpa_auth_sta_init(hapd
->wpa_auth
,
181 if (sta
->wpa_sm
== NULL
) {
182 wpa_printf(MSG_ERROR
, "Failed to initialize WPA state "
186 res
= wpa_validate_wpa_ie(hapd
->wpa_auth
, sta
->wpa_sm
,
188 if (res
!= WPA_IE_OK
) {
190 wpa_printf(MSG_DEBUG
, "WPA/RSN information element "
191 "rejected? (res %u)", res
);
192 wpa_hexdump(MSG_DEBUG
, "IE", ie
, ielen
);
193 if (res
== WPA_INVALID_GROUP
)
194 resp
= WLAN_REASON_GROUP_CIPHER_NOT_VALID
;
195 else if (res
== WPA_INVALID_PAIRWISE
)
196 resp
= WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID
;
197 else if (res
== WPA_INVALID_AKMP
)
198 resp
= WLAN_REASON_AKMP_NOT_VALID
;
199 #ifdef CONFIG_IEEE80211W
200 else if (res
== WPA_MGMT_FRAME_PROTECTION_VIOLATION
)
201 resp
= WLAN_REASON_INVALID_IE
;
202 else if (res
== WPA_INVALID_MGMT_GROUP_CIPHER
)
203 resp
= WLAN_REASON_GROUP_CIPHER_NOT_VALID
;
204 #endif /* CONFIG_IEEE80211W */
206 resp
= WLAN_REASON_INVALID_IE
;
207 hostapd_sta_disassoc(hapd
, sta
->addr
, resp
);
208 ap_free_sta(hapd
, sta
);
211 } else if (hapd
->conf
->wps_state
) {
212 if (ie
&& ielen
> 4 && ie
[0] == 0xdd && ie
[1] >= 4 &&
213 os_memcmp(ie
+ 2, "\x00\x50\xf2\x04", 4) == 0) {
214 sta
->flags
|= WLAN_STA_WPS
;
216 sta
->flags
|= WLAN_STA_MAYBE_WPS
;
220 new_assoc
= (sta
->flags
& WLAN_STA_ASSOC
) == 0;
221 sta
->flags
|= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
222 wpa_auth_sm_event(sta
->wpa_sm
, WPA_ASSOC
);
224 hostapd_new_assoc_sta(hapd
, sta
, !new_assoc
);
226 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 1);
232 void hostapd_notif_disassoc(struct hostapd_data
*hapd
, const u8
*addr
)
234 struct sta_info
*sta
;
236 hostapd_logger(hapd
, addr
, HOSTAPD_MODULE_IEEE80211
,
237 HOSTAPD_LEVEL_INFO
, "disassociated");
239 sta
= ap_get_sta(hapd
, addr
);
241 wpa_printf(MSG_DEBUG
, "Disassociation notification for "
242 "unknown STA " MACSTR
, MAC2STR(addr
));
246 sta
->flags
&= ~(WLAN_STA_AUTH
| WLAN_STA_ASSOC
);
247 wpa_auth_sm_event(sta
->wpa_sm
, WPA_DISASSOC
);
248 sta
->acct_terminate_cause
= RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST
;
249 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 0);
250 ap_free_sta(hapd
, sta
);
254 void hostapd_eapol_receive(struct hostapd_data
*hapd
, const u8
*sa
,
255 const u8
*buf
, size_t len
)
257 ieee802_1x_receive(hapd
, sa
, buf
, len
);
261 struct hostapd_data
* hostapd_sta_get_bss(struct hostapd_data
*hapd
,
264 struct hostapd_iface
*iface
= hapd
->iface
;
267 for (j
= 0; j
< iface
->num_bss
; j
++) {
268 hapd
= iface
->bss
[j
];
269 if (ap_get_sta(hapd
, addr
))
281 static const u8
* get_hdr_bssid(const struct ieee80211_hdr
*hdr
, size_t len
)
286 * PS-Poll frames are 16 bytes. All other frames are
287 * 24 bytes or longer.
292 fc
= le_to_host16(hdr
->frame_control
);
293 type
= WLAN_FC_GET_TYPE(fc
);
294 stype
= WLAN_FC_GET_STYPE(fc
);
297 case WLAN_FC_TYPE_DATA
:
300 switch (fc
& (WLAN_FC_FROMDS
| WLAN_FC_TODS
)) {
308 case WLAN_FC_TYPE_CTRL
:
309 if (stype
!= WLAN_FC_STYPE_PSPOLL
)
312 case WLAN_FC_TYPE_MGMT
:
320 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
322 static struct hostapd_data
* get_hapd_bssid(struct hostapd_iface
*iface
,
329 if (bssid
[0] == 0xff && bssid
[1] == 0xff && bssid
[2] == 0xff &&
330 bssid
[3] == 0xff && bssid
[4] == 0xff && bssid
[5] == 0xff)
331 return HAPD_BROADCAST
;
333 for (i
= 0; i
< iface
->num_bss
; i
++) {
334 if (os_memcmp(bssid
, iface
->bss
[i
]->own_addr
, ETH_ALEN
) == 0)
335 return iface
->bss
[i
];
342 static void hostapd_rx_from_unknown_sta(struct hostapd_data
*hapd
,
343 const struct ieee80211_hdr
*hdr
,
346 hapd
= get_hapd_bssid(hapd
->iface
, get_hdr_bssid(hdr
, len
));
347 if (hapd
== NULL
|| hapd
== HAPD_BROADCAST
)
350 ieee802_11_rx_from_unknown(hapd
, hdr
->addr2
);
354 static void hostapd_mgmt_rx(struct hostapd_data
*hapd
, const u8
*buf
,
355 size_t len
, struct hostapd_frame_info
*fi
)
357 struct hostapd_iface
*iface
= hapd
->iface
;
358 const struct ieee80211_hdr
*hdr
;
361 hdr
= (const struct ieee80211_hdr
*) buf
;
362 bssid
= get_hdr_bssid(hdr
, len
);
366 hapd
= get_hapd_bssid(iface
, bssid
);
369 fc
= le_to_host16(hdr
->frame_control
);
372 * Drop frames to unknown BSSIDs except for Beacon frames which
373 * could be used to update neighbor information.
375 if (WLAN_FC_GET_TYPE(fc
) == WLAN_FC_TYPE_MGMT
&&
376 WLAN_FC_GET_STYPE(fc
) == WLAN_FC_STYPE_BEACON
)
377 hapd
= iface
->bss
[0];
382 if (hapd
== HAPD_BROADCAST
) {
384 for (i
= 0; i
< iface
->num_bss
; i
++)
385 ieee802_11_mgmt(iface
->bss
[i
], buf
, len
, fi
);
387 ieee802_11_mgmt(hapd
, buf
, len
, fi
);
391 static void hostapd_mgmt_tx_cb(struct hostapd_data
*hapd
, const u8
*buf
,
392 size_t len
, u16 stype
, int ok
)
394 struct ieee80211_hdr
*hdr
;
395 hdr
= (struct ieee80211_hdr
*) buf
;
396 hapd
= get_hapd_bssid(hapd
->iface
, get_hdr_bssid(hdr
, len
));
397 if (hapd
== NULL
|| hapd
== HAPD_BROADCAST
)
399 ieee802_11_mgmt_cb(hapd
, buf
, len
, stype
, ok
);
402 #endif /* NEED_AP_MLME */
405 void wpa_supplicant_event(void *ctx
, wpa_event_type event
,
406 union wpa_event_data
*data
)
408 struct hostapd_data
*hapd
= ctx
;
411 case EVENT_MICHAEL_MIC_FAILURE
:
412 michael_mic_failure(hapd
, data
->michael_mic_failure
.src
, 1);
414 case EVENT_SCAN_RESULTS
:
415 if (hapd
->iface
->scan_cb
)
416 hapd
->iface
->scan_cb(hapd
->iface
);
418 #ifdef CONFIG_IEEE80211R
419 case EVENT_FT_RRB_RX
:
420 wpa_ft_rrb_rx(hapd
->wpa_auth
, data
->ft_rrb_rx
.src
,
421 data
->ft_rrb_rx
.data
, data
->ft_rrb_rx
.data_len
);
423 #endif /* CONFIG_IEEE80211R */
424 case EVENT_WPS_BUTTON_PUSHED
:
425 hostapd_wps_button_pushed(hapd
);
428 case EVENT_TX_STATUS
:
429 switch (data
->tx_status
.type
) {
430 case WLAN_FC_TYPE_MGMT
:
431 hostapd_mgmt_tx_cb(hapd
, data
->tx_status
.data
,
432 data
->tx_status
.data_len
,
433 data
->tx_status
.stype
,
434 data
->tx_status
.ack
);
436 case WLAN_FC_TYPE_DATA
:
437 hostapd_tx_status(hapd
, data
->tx_status
.dst
,
438 data
->tx_status
.data
,
439 data
->tx_status
.data_len
,
440 data
->tx_status
.ack
);
444 case EVENT_RX_FROM_UNKNOWN
:
445 hostapd_rx_from_unknown_sta(hapd
, data
->rx_from_unknown
.hdr
,
446 data
->rx_from_unknown
.len
);
449 hostapd_mgmt_rx(hapd
, data
->rx_mgmt
.frame
,
450 data
->rx_mgmt
.frame_len
, data
->rx_mgmt
.fi
);
452 #endif /* NEED_AP_MLME */
454 wpa_printf(MSG_DEBUG
, "Unknown event %d", event
);
462 void hostapd_probe_req_rx(struct hostapd_data
*hapd
, const u8
*sa
,
463 const u8
*ie
, size_t ie_len
)
467 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++)
468 hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,