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.
15 #include "utils/includes.h"
17 #include "utils/common.h"
18 #include "radius/radius.h"
19 #include "drivers/driver.h"
20 #include "common/ieee802_11_defs.h"
21 #include "common/ieee802_11_common.h"
22 #include "common/wpa_ctrl.h"
23 #include "crypto/random.h"
27 #include "ieee802_11.h"
29 #include "accounting.h"
30 #include "tkip_countermeasures.h"
32 #include "ieee802_1x.h"
35 #include "wps_hostapd.h"
36 #include "ap_drv_ops.h"
37 #include "ap_config.h"
40 int hostapd_notif_assoc(struct hostapd_data
*hapd
, const u8
*addr
,
41 const u8
*ie
, size_t ielen
, int reassoc
)
45 struct ieee802_11_elems elems
;
46 #if defined(CONFIG_P2P) || defined(CONFIG_WPS)
47 const u8
*all_ies
= ie
;
48 size_t all_ies_len
= ielen
;
49 #endif /* CONFIG_P2P || CONFIG_WPS */
53 * This could potentially happen with unexpected event from the
54 * driver wrapper. This was seen at least in one case where the
55 * driver ended up being set to station mode while hostapd was
56 * running, so better make sure we stop processing such an
59 wpa_printf(MSG_DEBUG
, "hostapd_notif_assoc: Skip event with "
63 random_add_randomness(addr
, ETH_ALEN
);
65 hostapd_logger(hapd
, addr
, HOSTAPD_MODULE_IEEE80211
,
66 HOSTAPD_LEVEL_INFO
, "associated");
68 ieee802_11_parse_elems(ie
, ielen
, &elems
, 0);
70 ie
= elems
.wps_ie
- 2;
71 ielen
= elems
.wps_ie_len
+ 2;
72 wpa_printf(MSG_DEBUG
, "STA included WPS IE in (Re)AssocReq");
73 } else if (elems
.rsn_ie
) {
74 ie
= elems
.rsn_ie
- 2;
75 ielen
= elems
.rsn_ie_len
+ 2;
76 wpa_printf(MSG_DEBUG
, "STA included RSN IE in (Re)AssocReq");
77 } else if (elems
.wpa_ie
) {
78 ie
= elems
.wpa_ie
- 2;
79 ielen
= elems
.wpa_ie_len
+ 2;
80 wpa_printf(MSG_DEBUG
, "STA included WPA IE in (Re)AssocReq");
84 wpa_printf(MSG_DEBUG
, "STA did not include WPS/RSN/WPA IE in "
88 sta
= ap_get_sta(hapd
, addr
);
90 accounting_sta_stop(hapd
, sta
);
92 sta
= ap_sta_add(hapd
, addr
);
96 sta
->flags
&= ~(WLAN_STA_WPS
| WLAN_STA_MAYBE_WPS
| WLAN_STA_WPS2
);
100 wpabuf_free(sta
->p2p_ie
);
101 sta
->p2p_ie
= ieee802_11_vendor_ie_concat(all_ies
, all_ies_len
,
104 #endif /* CONFIG_P2P */
106 if (hapd
->conf
->wpa
) {
107 if (ie
== NULL
|| ielen
== 0) {
109 if (hapd
->conf
->wps_state
) {
110 wpa_printf(MSG_DEBUG
, "STA did not include "
111 "WPA/RSN IE in (Re)Association "
112 "Request - possible WPS use");
113 sta
->flags
|= WLAN_STA_MAYBE_WPS
;
116 #endif /* CONFIG_WPS */
118 wpa_printf(MSG_DEBUG
, "No WPA/RSN IE from STA");
122 if (hapd
->conf
->wps_state
&& ie
[0] == 0xdd && ie
[1] >= 4 &&
123 os_memcmp(ie
+ 2, "\x00\x50\xf2\x04", 4) == 0) {
125 sta
->flags
|= WLAN_STA_WPS
;
126 wps
= ieee802_11_vendor_ie_concat(ie
, ielen
,
129 if (wps_is_20(wps
)) {
130 wpa_printf(MSG_DEBUG
, "WPS: STA "
132 sta
->flags
|= WLAN_STA_WPS2
;
138 #endif /* CONFIG_WPS */
140 if (sta
->wpa_sm
== NULL
)
141 sta
->wpa_sm
= wpa_auth_sta_init(hapd
->wpa_auth
,
143 if (sta
->wpa_sm
== NULL
) {
144 wpa_printf(MSG_ERROR
, "Failed to initialize WPA state "
148 res
= wpa_validate_wpa_ie(hapd
->wpa_auth
, sta
->wpa_sm
,
150 if (res
!= WPA_IE_OK
) {
152 wpa_printf(MSG_DEBUG
, "WPA/RSN information element "
153 "rejected? (res %u)", res
);
154 wpa_hexdump(MSG_DEBUG
, "IE", ie
, ielen
);
155 if (res
== WPA_INVALID_GROUP
)
156 resp
= WLAN_REASON_GROUP_CIPHER_NOT_VALID
;
157 else if (res
== WPA_INVALID_PAIRWISE
)
158 resp
= WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID
;
159 else if (res
== WPA_INVALID_AKMP
)
160 resp
= WLAN_REASON_AKMP_NOT_VALID
;
161 #ifdef CONFIG_IEEE80211W
162 else if (res
== WPA_MGMT_FRAME_PROTECTION_VIOLATION
)
163 resp
= WLAN_REASON_INVALID_IE
;
164 else if (res
== WPA_INVALID_MGMT_GROUP_CIPHER
)
165 resp
= WLAN_REASON_GROUP_CIPHER_NOT_VALID
;
166 #endif /* CONFIG_IEEE80211W */
168 resp
= WLAN_REASON_INVALID_IE
;
169 hostapd_drv_sta_disassoc(hapd
, sta
->addr
, resp
);
170 ap_free_sta(hapd
, sta
);
173 } else if (hapd
->conf
->wps_state
) {
177 wps
= ieee802_11_vendor_ie_concat(all_ies
, all_ies_len
,
181 #ifdef CONFIG_WPS_STRICT
182 if (wps
&& wps_validate_assoc_req(wps
) < 0) {
183 hostapd_drv_sta_disassoc(hapd
, sta
->addr
,
184 WLAN_REASON_INVALID_IE
);
185 ap_free_sta(hapd
, sta
);
189 #endif /* CONFIG_WPS_STRICT */
191 sta
->flags
|= WLAN_STA_WPS
;
192 if (wps_is_20(wps
)) {
193 wpa_printf(MSG_DEBUG
, "WPS: STA supports "
195 sta
->flags
|= WLAN_STA_WPS2
;
198 sta
->flags
|= WLAN_STA_MAYBE_WPS
;
200 #endif /* CONFIG_WPS */
204 #endif /* CONFIG_WPS */
206 new_assoc
= (sta
->flags
& WLAN_STA_ASSOC
) == 0;
207 sta
->flags
|= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
208 wpa_auth_sm_event(sta
->wpa_sm
, WPA_ASSOC
);
210 hostapd_new_assoc_sta(hapd
, sta
, !new_assoc
);
212 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 1);
215 p2p_group_notif_assoc(hapd
->p2p_group
, sta
->addr
,
216 all_ies
, all_ies_len
);
217 #endif /* CONFIG_P2P */
223 void hostapd_notif_disassoc(struct hostapd_data
*hapd
, const u8
*addr
)
225 struct sta_info
*sta
;
229 * This could potentially happen with unexpected event from the
230 * driver wrapper. This was seen at least in one case where the
231 * driver ended up reporting a station mode event while hostapd
232 * was running, so better make sure we stop processing such an
235 wpa_printf(MSG_DEBUG
, "hostapd_notif_disassoc: Skip event "
240 hostapd_logger(hapd
, addr
, HOSTAPD_MODULE_IEEE80211
,
241 HOSTAPD_LEVEL_INFO
, "disassociated");
243 sta
= ap_get_sta(hapd
, addr
);
245 wpa_printf(MSG_DEBUG
, "Disassociation notification for "
246 "unknown STA " MACSTR
, MAC2STR(addr
));
250 sta
->flags
&= ~(WLAN_STA_AUTH
| WLAN_STA_ASSOC
);
251 wpa_msg(hapd
->msg_ctx
, MSG_INFO
, AP_STA_DISCONNECTED MACSTR
,
253 wpa_auth_sm_event(sta
->wpa_sm
, WPA_DISASSOC
);
254 sta
->acct_terminate_cause
= RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST
;
255 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 0);
256 ap_free_sta(hapd
, sta
);
260 void hostapd_event_sta_low_ack(struct hostapd_data
*hapd
, const u8
*addr
)
262 struct sta_info
*sta
= ap_get_sta(hapd
, addr
);
264 if (!sta
|| !hapd
->conf
->disassoc_low_ack
)
267 hostapd_logger(hapd
, addr
, HOSTAPD_MODULE_IEEE80211
,
268 HOSTAPD_LEVEL_INFO
, "disconnected due to excessive "
270 hostapd_drv_sta_disassoc(hapd
, addr
, WLAN_REASON_DISASSOC_LOW_ACK
);
272 ap_sta_disassociate(hapd
, sta
, WLAN_REASON_DISASSOC_LOW_ACK
);
276 int hostapd_probe_req_rx(struct hostapd_data
*hapd
, const u8
*sa
, const u8
*da
,
277 const u8
*bssid
, const u8
*ie
, size_t ie_len
)
282 if (sa
== NULL
|| ie
== NULL
)
285 random_add_randomness(sa
, ETH_ALEN
);
286 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++) {
287 if (hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,
288 sa
, da
, bssid
, ie
, ie_len
) > 0) {
301 static const u8
* get_hdr_bssid(const struct ieee80211_hdr
*hdr
, size_t len
)
306 * PS-Poll frames are 16 bytes. All other frames are
307 * 24 bytes or longer.
312 fc
= le_to_host16(hdr
->frame_control
);
313 type
= WLAN_FC_GET_TYPE(fc
);
314 stype
= WLAN_FC_GET_STYPE(fc
);
317 case WLAN_FC_TYPE_DATA
:
320 switch (fc
& (WLAN_FC_FROMDS
| WLAN_FC_TODS
)) {
321 case WLAN_FC_FROMDS
| WLAN_FC_TODS
:
329 case WLAN_FC_TYPE_CTRL
:
330 if (stype
!= WLAN_FC_STYPE_PSPOLL
)
333 case WLAN_FC_TYPE_MGMT
:
341 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
343 static struct hostapd_data
* get_hapd_bssid(struct hostapd_iface
*iface
,
350 if (bssid
[0] == 0xff && bssid
[1] == 0xff && bssid
[2] == 0xff &&
351 bssid
[3] == 0xff && bssid
[4] == 0xff && bssid
[5] == 0xff)
352 return HAPD_BROADCAST
;
354 for (i
= 0; i
< iface
->num_bss
; i
++) {
355 if (os_memcmp(bssid
, iface
->bss
[i
]->own_addr
, ETH_ALEN
) == 0)
356 return iface
->bss
[i
];
363 static void hostapd_rx_from_unknown_sta(struct hostapd_data
*hapd
,
364 const u8
*frame
, size_t len
)
366 const struct ieee80211_hdr
*hdr
= (const struct ieee80211_hdr
*) frame
;
367 u16 fc
= le_to_host16(hdr
->frame_control
);
368 hapd
= get_hapd_bssid(hapd
->iface
, get_hdr_bssid(hdr
, len
));
369 if (hapd
== NULL
|| hapd
== HAPD_BROADCAST
)
372 ieee802_11_rx_from_unknown(hapd
, hdr
->addr2
,
373 (fc
& (WLAN_FC_TODS
| WLAN_FC_FROMDS
)) ==
374 (WLAN_FC_TODS
| WLAN_FC_FROMDS
));
378 static void hostapd_mgmt_rx(struct hostapd_data
*hapd
, struct rx_mgmt
*rx_mgmt
)
380 struct hostapd_iface
*iface
= hapd
->iface
;
381 const struct ieee80211_hdr
*hdr
;
383 struct hostapd_frame_info fi
;
385 hdr
= (const struct ieee80211_hdr
*) rx_mgmt
->frame
;
386 bssid
= get_hdr_bssid(hdr
, rx_mgmt
->frame_len
);
390 hapd
= get_hapd_bssid(iface
, bssid
);
393 fc
= le_to_host16(hdr
->frame_control
);
396 * Drop frames to unknown BSSIDs except for Beacon frames which
397 * could be used to update neighbor information.
399 if (WLAN_FC_GET_TYPE(fc
) == WLAN_FC_TYPE_MGMT
&&
400 WLAN_FC_GET_STYPE(fc
) == WLAN_FC_STYPE_BEACON
)
401 hapd
= iface
->bss
[0];
406 os_memset(&fi
, 0, sizeof(fi
));
407 fi
.datarate
= rx_mgmt
->datarate
;
408 fi
.ssi_signal
= rx_mgmt
->ssi_signal
;
410 if (hapd
== HAPD_BROADCAST
) {
412 for (i
= 0; i
< iface
->num_bss
; i
++)
413 ieee802_11_mgmt(iface
->bss
[i
], rx_mgmt
->frame
,
414 rx_mgmt
->frame_len
, &fi
);
416 ieee802_11_mgmt(hapd
, rx_mgmt
->frame
, rx_mgmt
->frame_len
, &fi
);
418 random_add_randomness(&fi
, sizeof(fi
));
422 static void hostapd_rx_action(struct hostapd_data
*hapd
,
423 struct rx_action
*rx_action
)
425 struct rx_mgmt rx_mgmt
;
427 struct ieee80211_hdr
*hdr
;
429 wpa_printf(MSG_DEBUG
, "EVENT_RX_ACTION DA=" MACSTR
" SA=" MACSTR
430 " BSSID=" MACSTR
" category=%u",
431 MAC2STR(rx_action
->da
), MAC2STR(rx_action
->sa
),
432 MAC2STR(rx_action
->bssid
), rx_action
->category
);
433 wpa_hexdump(MSG_MSGDUMP
, "Received action frame contents",
434 rx_action
->data
, rx_action
->len
);
436 buf
= os_zalloc(24 + 1 + rx_action
->len
);
439 hdr
= (struct ieee80211_hdr
*) buf
;
440 hdr
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
441 WLAN_FC_STYPE_ACTION
);
442 if (rx_action
->category
== WLAN_ACTION_SA_QUERY
) {
444 * Assume frame was protected; it would have been dropped if
447 hdr
->frame_control
|= host_to_le16(WLAN_FC_ISWEP
);
449 os_memcpy(hdr
->addr1
, rx_action
->da
, ETH_ALEN
);
450 os_memcpy(hdr
->addr2
, rx_action
->sa
, ETH_ALEN
);
451 os_memcpy(hdr
->addr3
, rx_action
->bssid
, ETH_ALEN
);
452 buf
[24] = rx_action
->category
;
453 os_memcpy(buf
+ 24 + 1, rx_action
->data
, rx_action
->len
);
454 os_memset(&rx_mgmt
, 0, sizeof(rx_mgmt
));
456 rx_mgmt
.frame_len
= 24 + 1 + rx_action
->len
;
457 hostapd_mgmt_rx(hapd
, &rx_mgmt
);
462 static void hostapd_mgmt_tx_cb(struct hostapd_data
*hapd
, const u8
*buf
,
463 size_t len
, u16 stype
, int ok
)
465 struct ieee80211_hdr
*hdr
;
466 hdr
= (struct ieee80211_hdr
*) buf
;
467 hapd
= get_hapd_bssid(hapd
->iface
, get_hdr_bssid(hdr
, len
));
468 if (hapd
== NULL
|| hapd
== HAPD_BROADCAST
)
470 ieee802_11_mgmt_cb(hapd
, buf
, len
, stype
, ok
);
473 #endif /* NEED_AP_MLME */
476 static int hostapd_event_new_sta(struct hostapd_data
*hapd
, const u8
*addr
)
478 struct sta_info
*sta
= ap_get_sta(hapd
, addr
);
482 wpa_printf(MSG_DEBUG
, "Data frame from unknown STA " MACSTR
483 " - adding a new STA", MAC2STR(addr
));
484 sta
= ap_sta_add(hapd
, addr
);
486 hostapd_new_assoc_sta(hapd
, sta
, 0);
488 wpa_printf(MSG_DEBUG
, "Failed to add STA entry for " MACSTR
,
497 static void hostapd_event_eapol_rx(struct hostapd_data
*hapd
, const u8
*src
,
498 const u8
*data
, size_t data_len
)
500 struct hostapd_iface
*iface
= hapd
->iface
;
503 for (j
= 0; j
< iface
->num_bss
; j
++) {
504 if (ap_get_sta(iface
->bss
[j
], src
)) {
505 hapd
= iface
->bss
[j
];
510 ieee802_1x_receive(hapd
, src
, data
, data_len
);
514 void wpa_supplicant_event(void *ctx
, enum wpa_event_type event
,
515 union wpa_event_data
*data
)
517 struct hostapd_data
*hapd
= ctx
;
520 case EVENT_MICHAEL_MIC_FAILURE
:
521 michael_mic_failure(hapd
, data
->michael_mic_failure
.src
, 1);
523 case EVENT_SCAN_RESULTS
:
524 if (hapd
->iface
->scan_cb
)
525 hapd
->iface
->scan_cb(hapd
->iface
);
527 #ifdef CONFIG_IEEE80211R
528 case EVENT_FT_RRB_RX
:
529 wpa_ft_rrb_rx(hapd
->wpa_auth
, data
->ft_rrb_rx
.src
,
530 data
->ft_rrb_rx
.data
, data
->ft_rrb_rx
.data_len
);
532 #endif /* CONFIG_IEEE80211R */
533 case EVENT_WPS_BUTTON_PUSHED
:
534 hostapd_wps_button_pushed(hapd
, NULL
);
537 case EVENT_TX_STATUS
:
538 switch (data
->tx_status
.type
) {
539 case WLAN_FC_TYPE_MGMT
:
540 hostapd_mgmt_tx_cb(hapd
, data
->tx_status
.data
,
541 data
->tx_status
.data_len
,
542 data
->tx_status
.stype
,
543 data
->tx_status
.ack
);
545 case WLAN_FC_TYPE_DATA
:
546 hostapd_tx_status(hapd
, data
->tx_status
.dst
,
547 data
->tx_status
.data
,
548 data
->tx_status
.data_len
,
549 data
->tx_status
.ack
);
553 case EVENT_RX_FROM_UNKNOWN
:
554 hostapd_rx_from_unknown_sta(hapd
, data
->rx_from_unknown
.frame
,
555 data
->rx_from_unknown
.len
);
558 hostapd_mgmt_rx(hapd
, &data
->rx_mgmt
);
560 #endif /* NEED_AP_MLME */
561 case EVENT_RX_PROBE_REQ
:
562 if (data
->rx_probe_req
.sa
== NULL
||
563 data
->rx_probe_req
.ie
== NULL
)
565 hostapd_probe_req_rx(hapd
, data
->rx_probe_req
.sa
,
566 data
->rx_probe_req
.da
,
567 data
->rx_probe_req
.bssid
,
568 data
->rx_probe_req
.ie
,
569 data
->rx_probe_req
.ie_len
);
572 hostapd_event_new_sta(hapd
, data
->new_sta
.addr
);
575 hostapd_event_eapol_rx(hapd
, data
->eapol_rx
.src
,
577 data
->eapol_rx
.data_len
);
580 hostapd_notif_assoc(hapd
, data
->assoc_info
.addr
,
581 data
->assoc_info
.req_ies
,
582 data
->assoc_info
.req_ies_len
,
583 data
->assoc_info
.reassoc
);
587 hostapd_notif_disassoc(hapd
, data
->disassoc_info
.addr
);
591 hostapd_notif_disassoc(hapd
, data
->deauth_info
.addr
);
593 case EVENT_STATION_LOW_ACK
:
596 hostapd_event_sta_low_ack(hapd
, data
->low_ack
.addr
);
599 case EVENT_RX_ACTION
:
600 if (data
->rx_action
.da
== NULL
|| data
->rx_action
.sa
== NULL
||
601 data
->rx_action
.bssid
== NULL
)
603 hostapd_rx_action(hapd
, &data
->rx_action
);
605 #endif /* NEED_AP_MLME */
607 wpa_printf(MSG_DEBUG
, "Unknown event %d", event
);