2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2008, 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.
18 #include "eapol_supp/eapol_supp_sm.h"
21 #include "drivers/driver.h"
23 #include "l2_packet/l2_packet.h"
24 #include "wpa_supplicant_i.h"
25 #include "pcsc_funcs.h"
27 #include "pmksa_cache.h"
29 #include "eap_peer/eap.h"
30 #include "ctrl_iface_dbus.h"
31 #include "ieee802_11_defs.h"
32 #include "blacklist.h"
33 #include "wpas_glue.h"
34 #include "wps_supplicant.h"
37 static int wpa_supplicant_select_config(struct wpa_supplicant
*wpa_s
)
39 struct wpa_ssid
*ssid
;
41 if (wpa_s
->conf
->ap_scan
== 1 && wpa_s
->current_ssid
)
44 wpa_printf(MSG_DEBUG
, "Select network based on association "
46 ssid
= wpa_supplicant_get_ssid(wpa_s
);
48 wpa_printf(MSG_INFO
, "No network configuration found for the "
54 wpa_printf(MSG_DEBUG
, "Selected network is disabled");
58 wpa_printf(MSG_DEBUG
, "Network configuration found for the current "
60 if (ssid
->key_mgmt
& (WPA_KEY_MGMT_PSK
| WPA_KEY_MGMT_IEEE8021X
|
61 WPA_KEY_MGMT_WPA_NONE
|
62 WPA_KEY_MGMT_FT_PSK
| WPA_KEY_MGMT_FT_IEEE8021X
|
63 WPA_KEY_MGMT_PSK_SHA256
|
64 WPA_KEY_MGMT_IEEE8021X_SHA256
)) {
66 size_t wpa_ie_len
= sizeof(wpa_ie
);
67 wpa_supplicant_set_suites(wpa_s
, NULL
, ssid
,
70 wpa_supplicant_set_non_wpa_policy(wpa_s
, ssid
);
73 if (wpa_s
->current_ssid
&& wpa_s
->current_ssid
!= ssid
)
74 eapol_sm_invalidate_cached_session(wpa_s
->eapol
);
75 wpa_s
->current_ssid
= ssid
;
76 wpa_supplicant_rsn_supp_set_config(wpa_s
, wpa_s
->current_ssid
);
77 wpa_supplicant_initiate_eapol(wpa_s
);
83 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx
,
86 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
88 if (wpa_s
->countermeasures
) {
89 wpa_s
->countermeasures
= 0;
90 wpa_drv_set_countermeasures(wpa_s
, 0);
91 wpa_msg(wpa_s
, MSG_INFO
, "WPA: TKIP countermeasures stopped");
92 wpa_supplicant_req_scan(wpa_s
, 0, 0);
97 void wpa_supplicant_mark_disassoc(struct wpa_supplicant
*wpa_s
)
99 wpa_supplicant_set_state(wpa_s
, WPA_DISCONNECTED
);
100 os_memset(wpa_s
->bssid
, 0, ETH_ALEN
);
101 os_memset(wpa_s
->pending_bssid
, 0, ETH_ALEN
);
102 eapol_sm_notify_portEnabled(wpa_s
->eapol
, FALSE
);
103 eapol_sm_notify_portValid(wpa_s
->eapol
, FALSE
);
104 if (wpa_key_mgmt_wpa_psk(wpa_s
->key_mgmt
))
105 eapol_sm_notify_eap_success(wpa_s
->eapol
, FALSE
);
106 wpa_s
->ap_ies_from_associnfo
= 0;
110 static void wpa_find_assoc_pmkid(struct wpa_supplicant
*wpa_s
)
112 struct wpa_ie_data ie
;
116 if (wpa_sm_parse_own_wpa_ie(wpa_s
->wpa
, &ie
) < 0 ||
120 for (i
= 0; i
< ie
.num_pmkid
; i
++) {
121 pmksa_set
= pmksa_cache_set_current(wpa_s
->wpa
,
122 ie
.pmkid
+ i
* PMKID_LEN
,
124 if (pmksa_set
== 0) {
125 eapol_sm_notify_pmkid_attempt(wpa_s
->eapol
, 1);
130 wpa_printf(MSG_DEBUG
, "RSN: PMKID from assoc IE %sfound from PMKSA "
131 "cache", pmksa_set
== 0 ? "" : "not ");
135 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant
*wpa_s
,
136 union wpa_event_data
*data
)
139 wpa_printf(MSG_DEBUG
, "RSN: No data in PMKID candidate event");
142 wpa_printf(MSG_DEBUG
, "RSN: PMKID candidate event - bssid=" MACSTR
143 " index=%d preauth=%d",
144 MAC2STR(data
->pmkid_candidate
.bssid
),
145 data
->pmkid_candidate
.index
,
146 data
->pmkid_candidate
.preauth
);
148 pmksa_candidate_add(wpa_s
->wpa
, data
->pmkid_candidate
.bssid
,
149 data
->pmkid_candidate
.index
,
150 data
->pmkid_candidate
.preauth
);
154 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant
*wpa_s
)
156 if (wpa_s
->key_mgmt
== WPA_KEY_MGMT_NONE
||
157 wpa_s
->key_mgmt
== WPA_KEY_MGMT_WPA_NONE
)
160 #ifdef IEEE8021X_EAPOL
161 if (wpa_s
->key_mgmt
== WPA_KEY_MGMT_IEEE8021X_NO_WPA
&&
162 wpa_s
->current_ssid
&&
163 !(wpa_s
->current_ssid
->eapol_flags
&
164 (EAPOL_FLAG_REQUIRE_KEY_UNICAST
|
165 EAPOL_FLAG_REQUIRE_KEY_BROADCAST
))) {
166 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
167 * plaintext or static WEP keys). */
170 #endif /* IEEE8021X_EAPOL */
177 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
178 * @wpa_s: pointer to wpa_supplicant data
179 * @ssid: Configuration data for the network
180 * Returns: 0 on success, -1 on failure
182 * This function is called when starting authentication with a network that is
183 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
185 int wpa_supplicant_scard_init(struct wpa_supplicant
*wpa_s
,
186 struct wpa_ssid
*ssid
)
188 #ifdef IEEE8021X_EAPOL
189 int aka
= 0, sim
= 0, type
;
191 if (ssid
->eap
.pcsc
== NULL
|| wpa_s
->scard
!= NULL
)
194 if (ssid
->eap
.eap_methods
== NULL
) {
198 struct eap_method_type
*eap
= ssid
->eap
.eap_methods
;
199 while (eap
->vendor
!= EAP_VENDOR_IETF
||
200 eap
->method
!= EAP_TYPE_NONE
) {
201 if (eap
->vendor
== EAP_VENDOR_IETF
) {
202 if (eap
->method
== EAP_TYPE_SIM
)
204 else if (eap
->method
== EAP_TYPE_AKA
)
211 if (eap_peer_get_eap_method(EAP_VENDOR_IETF
, EAP_TYPE_SIM
) == NULL
)
213 if (eap_peer_get_eap_method(EAP_VENDOR_IETF
, EAP_TYPE_AKA
) == NULL
)
217 wpa_printf(MSG_DEBUG
, "Selected network is configured to use "
218 "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
222 wpa_printf(MSG_DEBUG
, "Selected network is configured to use SIM "
223 "(sim=%d aka=%d) - initialize PCSC", sim
, aka
);
225 type
= SCARD_TRY_BOTH
;
227 type
= SCARD_USIM_ONLY
;
229 type
= SCARD_GSM_SIM_ONLY
;
231 wpa_s
->scard
= scard_init(type
);
232 if (wpa_s
->scard
== NULL
) {
233 wpa_printf(MSG_WARNING
, "Failed to initialize SIM "
237 wpa_sm_set_scard_ctx(wpa_s
->wpa
, wpa_s
->scard
);
238 eapol_sm_register_scard_ctx(wpa_s
->eapol
, wpa_s
->scard
);
239 #endif /* IEEE8021X_EAPOL */
245 #ifndef CONFIG_NO_SCAN_PROCESSING
246 static int wpa_supplicant_match_privacy(struct wpa_scan_res
*bss
,
247 struct wpa_ssid
*ssid
)
251 if (ssid
->mixed_cell
)
254 for (i
= 0; i
< NUM_WEP_KEYS
; i
++) {
255 if (ssid
->wep_key_len
[i
]) {
260 #ifdef IEEE8021X_EAPOL
261 if ((ssid
->key_mgmt
& WPA_KEY_MGMT_IEEE8021X_NO_WPA
) &&
262 ssid
->eapol_flags
& (EAPOL_FLAG_REQUIRE_KEY_UNICAST
|
263 EAPOL_FLAG_REQUIRE_KEY_BROADCAST
))
265 #endif /* IEEE8021X_EAPOL */
267 if (bss
->caps
& IEEE80211_CAP_PRIVACY
)
273 static int wpa_supplicant_ssid_bss_match(struct wpa_ssid
*ssid
,
274 struct wpa_scan_res
*bss
)
276 struct wpa_ie_data ie
;
278 const u8
*rsn_ie
, *wpa_ie
;
281 ret
= wpas_wps_ssid_bss_match(ssid
, bss
);
285 rsn_ie
= wpa_scan_get_ie(bss
, WLAN_EID_RSN
);
286 while ((ssid
->proto
& WPA_PROTO_RSN
) && rsn_ie
) {
289 if (wpa_parse_wpa_ie(rsn_ie
, 2 + rsn_ie
[1], &ie
)) {
290 wpa_printf(MSG_DEBUG
, " skip RSN IE - parse failed");
293 if (!(ie
.proto
& ssid
->proto
)) {
294 wpa_printf(MSG_DEBUG
, " skip RSN IE - proto "
299 if (!(ie
.pairwise_cipher
& ssid
->pairwise_cipher
)) {
300 wpa_printf(MSG_DEBUG
, " skip RSN IE - PTK cipher "
305 if (!(ie
.group_cipher
& ssid
->group_cipher
)) {
306 wpa_printf(MSG_DEBUG
, " skip RSN IE - GTK cipher "
311 if (!(ie
.key_mgmt
& ssid
->key_mgmt
)) {
312 wpa_printf(MSG_DEBUG
, " skip RSN IE - key mgmt "
317 #ifdef CONFIG_IEEE80211W
318 if (!(ie
.capabilities
& WPA_CAPABILITY_MFPC
) &&
319 ssid
->ieee80211w
== IEEE80211W_REQUIRED
) {
320 wpa_printf(MSG_DEBUG
, " skip RSN IE - no mgmt frame "
324 #endif /* CONFIG_IEEE80211W */
326 wpa_printf(MSG_DEBUG
, " selected based on RSN IE");
330 wpa_ie
= wpa_scan_get_vendor_ie(bss
, WPA_IE_VENDOR_TYPE
);
331 while ((ssid
->proto
& WPA_PROTO_WPA
) && wpa_ie
) {
334 if (wpa_parse_wpa_ie(wpa_ie
, 2 + wpa_ie
[1], &ie
)) {
335 wpa_printf(MSG_DEBUG
, " skip WPA IE - parse failed");
338 if (!(ie
.proto
& ssid
->proto
)) {
339 wpa_printf(MSG_DEBUG
, " skip WPA IE - proto "
344 if (!(ie
.pairwise_cipher
& ssid
->pairwise_cipher
)) {
345 wpa_printf(MSG_DEBUG
, " skip WPA IE - PTK cipher "
350 if (!(ie
.group_cipher
& ssid
->group_cipher
)) {
351 wpa_printf(MSG_DEBUG
, " skip WPA IE - GTK cipher "
356 if (!(ie
.key_mgmt
& ssid
->key_mgmt
)) {
357 wpa_printf(MSG_DEBUG
, " skip WPA IE - key mgmt "
362 wpa_printf(MSG_DEBUG
, " selected based on WPA IE");
366 if (proto_match
== 0)
367 wpa_printf(MSG_DEBUG
, " skip - no WPA/RSN proto match");
373 static struct wpa_scan_res
*
374 wpa_supplicant_select_bss_wpa(struct wpa_supplicant
*wpa_s
,
375 struct wpa_ssid
*group
,
376 struct wpa_ssid
**selected_ssid
)
378 struct wpa_ssid
*ssid
;
379 struct wpa_scan_res
*bss
;
381 struct wpa_blacklist
*e
;
384 wpa_printf(MSG_DEBUG
, "Try to find WPA-enabled AP");
385 for (i
= 0; i
< wpa_s
->scan_res
->num
; i
++) {
387 u8 wpa_ie_len
, rsn_ie_len
, ssid_len
;
388 bss
= wpa_s
->scan_res
->res
[i
];
390 ie
= wpa_scan_get_ie(bss
, WLAN_EID_SSID
);
391 ssid_
= ie
? ie
+ 2 : (u8
*) "";
392 ssid_len
= ie
? ie
[1] : 0;
394 ie
= wpa_scan_get_vendor_ie(bss
, WPA_IE_VENDOR_TYPE
);
395 wpa_ie_len
= ie
? ie
[1] : 0;
397 ie
= wpa_scan_get_ie(bss
, WLAN_EID_RSN
);
398 rsn_ie_len
= ie
? ie
[1] : 0;
400 wpa_printf(MSG_DEBUG
, "%d: " MACSTR
" ssid='%s' "
401 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
402 (int) i
, MAC2STR(bss
->bssid
),
403 wpa_ssid_txt(ssid_
, ssid_len
),
404 wpa_ie_len
, rsn_ie_len
, bss
->caps
);
406 e
= wpa_blacklist_get(wpa_s
, bss
->bssid
);
407 if (e
&& e
->count
> 1) {
408 wpa_printf(MSG_DEBUG
, " skip - blacklisted");
412 if (wpa_ie_len
== 0 && rsn_ie_len
== 0) {
413 wpa_printf(MSG_DEBUG
, " skip - no WPA/RSN IE");
417 for (ssid
= group
; ssid
; ssid
= ssid
->pnext
) {
420 if (ssid
->disabled
) {
421 wpa_printf(MSG_DEBUG
, " skip - disabled");
426 if (ssid
->ssid_len
== 0 &&
427 wpas_wps_ssid_wildcard_ok(ssid
, bss
))
429 #endif /* CONFIG_WPS */
432 (ssid_len
!= ssid
->ssid_len
||
433 os_memcmp(ssid_
, ssid
->ssid
, ssid_len
) != 0)) {
434 wpa_printf(MSG_DEBUG
, " skip - "
439 if (ssid
->bssid_set
&&
440 os_memcmp(bss
->bssid
, ssid
->bssid
, ETH_ALEN
) != 0)
442 wpa_printf(MSG_DEBUG
, " skip - "
447 if (!wpa_supplicant_ssid_bss_match(ssid
, bss
))
450 wpa_printf(MSG_DEBUG
, " selected WPA AP "
453 wpa_ssid_txt(ssid_
, ssid_len
));
454 *selected_ssid
= ssid
;
463 static struct wpa_scan_res
*
464 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant
*wpa_s
,
465 struct wpa_ssid
*group
,
466 struct wpa_ssid
**selected_ssid
)
468 struct wpa_ssid
*ssid
;
469 struct wpa_scan_res
*bss
;
471 struct wpa_blacklist
*e
;
474 wpa_printf(MSG_DEBUG
, "Try to find non-WPA AP");
475 for (i
= 0; i
< wpa_s
->scan_res
->num
; i
++) {
477 u8 wpa_ie_len
, rsn_ie_len
, ssid_len
;
478 bss
= wpa_s
->scan_res
->res
[i
];
480 ie
= wpa_scan_get_ie(bss
, WLAN_EID_SSID
);
481 ssid_
= ie
? ie
+ 2 : (u8
*) "";
482 ssid_len
= ie
? ie
[1] : 0;
484 ie
= wpa_scan_get_vendor_ie(bss
, WPA_IE_VENDOR_TYPE
);
485 wpa_ie_len
= ie
? ie
[1] : 0;
487 ie
= wpa_scan_get_ie(bss
, WLAN_EID_RSN
);
488 rsn_ie_len
= ie
? ie
[1] : 0;
490 wpa_printf(MSG_DEBUG
, "%d: " MACSTR
" ssid='%s' "
491 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
492 (int) i
, MAC2STR(bss
->bssid
),
493 wpa_ssid_txt(ssid_
, ssid_len
),
494 wpa_ie_len
, rsn_ie_len
, bss
->caps
);
496 e
= wpa_blacklist_get(wpa_s
, bss
->bssid
);
497 if (e
&& e
->count
> 1) {
498 wpa_printf(MSG_DEBUG
, " skip - blacklisted");
502 for (ssid
= group
; ssid
; ssid
= ssid
->pnext
) {
503 int check_ssid
= ssid
->ssid_len
!= 0;
505 if (ssid
->disabled
) {
506 wpa_printf(MSG_DEBUG
, " skip - disabled");
511 if (ssid
->key_mgmt
& WPA_KEY_MGMT_WPS
) {
512 /* Only allow wildcard SSID match if an AP
513 * advertises active WPS operation that matches
516 if (ssid
->ssid_len
== 0 &&
517 wpas_wps_ssid_wildcard_ok(ssid
, bss
))
520 #endif /* CONFIG_WPS */
523 (ssid_len
!= ssid
->ssid_len
||
524 os_memcmp(ssid_
, ssid
->ssid
, ssid_len
) != 0)) {
525 wpa_printf(MSG_DEBUG
, " skip - "
530 if (ssid
->bssid_set
&&
531 os_memcmp(bss
->bssid
, ssid
->bssid
, ETH_ALEN
) != 0)
533 wpa_printf(MSG_DEBUG
, " skip - "
538 if (!(ssid
->key_mgmt
& WPA_KEY_MGMT_NONE
) &&
539 !(ssid
->key_mgmt
& WPA_KEY_MGMT_WPS
) &&
540 !(ssid
->key_mgmt
& WPA_KEY_MGMT_IEEE8021X_NO_WPA
))
542 wpa_printf(MSG_DEBUG
, " skip - "
543 "non-WPA network not allowed");
547 if ((ssid
->key_mgmt
&
548 (WPA_KEY_MGMT_IEEE8021X
| WPA_KEY_MGMT_PSK
|
549 WPA_KEY_MGMT_FT_IEEE8021X
| WPA_KEY_MGMT_FT_PSK
|
550 WPA_KEY_MGMT_IEEE8021X_SHA256
|
551 WPA_KEY_MGMT_PSK_SHA256
)) &&
552 (wpa_ie_len
!= 0 || rsn_ie_len
!= 0)) {
553 wpa_printf(MSG_DEBUG
, " skip - "
558 if (!wpa_supplicant_match_privacy(bss
, ssid
)) {
559 wpa_printf(MSG_DEBUG
, " skip - "
564 if (bss
->caps
& IEEE80211_CAP_IBSS
) {
565 wpa_printf(MSG_DEBUG
, " skip - "
566 "IBSS (adhoc) network");
570 wpa_printf(MSG_DEBUG
, " selected non-WPA AP "
573 wpa_ssid_txt(ssid_
, ssid_len
));
574 *selected_ssid
= ssid
;
583 static struct wpa_scan_res
*
584 wpa_supplicant_select_bss(struct wpa_supplicant
*wpa_s
, struct wpa_ssid
*group
,
585 struct wpa_ssid
**selected_ssid
)
587 struct wpa_scan_res
*selected
;
589 wpa_printf(MSG_DEBUG
, "Selecting BSS from priority group %d",
592 /* First, try to find WPA-enabled AP */
593 selected
= wpa_supplicant_select_bss_wpa(wpa_s
, group
, selected_ssid
);
597 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
599 return wpa_supplicant_select_bss_non_wpa(wpa_s
, group
, selected_ssid
);
603 static void wpa_supplicant_event_scan_results(struct wpa_supplicant
*wpa_s
)
606 struct wpa_scan_res
*selected
= NULL
;
607 struct wpa_ssid
*ssid
= NULL
;
609 if (wpa_supplicant_get_scan_results(wpa_s
) < 0) {
610 if (wpa_s
->conf
->ap_scan
== 2)
612 wpa_printf(MSG_DEBUG
, "Failed to get scan results - try "
619 * Don't post the results if this was the initial cached
620 * and there were no results.
622 if (wpa_s
->scan_res_tried
== 1 && wpa_s
->conf
->ap_scan
== 1 &&
623 wpa_s
->scan_res
->num
== 0) {
624 wpa_msg(wpa_s
, MSG_DEBUG
, "Cached scan results are "
625 "empty - not posting");
627 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
);
628 wpa_supplicant_dbus_notify_scan_results(wpa_s
);
629 wpas_wps_notify_scan_results(wpa_s
);
632 if (wpa_s
->conf
->ap_scan
== 2 || wpa_s
->disconnected
)
635 while (selected
== NULL
) {
636 for (prio
= 0; prio
< wpa_s
->conf
->num_prio
; prio
++) {
637 selected
= wpa_supplicant_select_bss(
638 wpa_s
, wpa_s
->conf
->pssid
[prio
], &ssid
);
643 if (selected
== NULL
&& wpa_s
->blacklist
) {
644 wpa_printf(MSG_DEBUG
, "No APs found - clear blacklist "
646 wpa_blacklist_clear(wpa_s
);
647 } else if (selected
== NULL
) {
653 if (wpas_wps_scan_pbc_overlap(wpa_s
, selected
, ssid
)) {
654 wpa_msg(wpa_s
, MSG_INFO
, WPS_EVENT_OVERLAP
655 "PBC session overlap");
660 /* Do not trigger new association unless the BSSID has changed
661 * or if reassociation is requested. If we are in process of
662 * associating with the selected BSSID, do not trigger new
664 if (wpa_s
->reassociate
||
665 (os_memcmp(selected
->bssid
, wpa_s
->bssid
, ETH_ALEN
) != 0 &&
666 (wpa_s
->wpa_state
!= WPA_ASSOCIATING
||
667 os_memcmp(selected
->bssid
, wpa_s
->pending_bssid
,
669 if (wpa_supplicant_scard_init(wpa_s
, ssid
)) {
670 wpa_supplicant_req_scan(wpa_s
, 10, 0);
673 wpa_supplicant_associate(wpa_s
, selected
, ssid
);
675 wpa_printf(MSG_DEBUG
, "Already associated with the "
678 rsn_preauth_scan_results(wpa_s
->wpa
, wpa_s
->scan_res
);
680 wpa_printf(MSG_DEBUG
, "No suitable AP found.");
688 if (wpa_s
->scan_res_tried
== 1 && wpa_s
->conf
->ap_scan
== 1) {
690 * Quick recovery if the initial scan results were not
691 * complete when fetched before the first scan request.
693 wpa_s
->scan_res_tried
++;
696 wpa_supplicant_req_scan(wpa_s
, timeout
, 0);
698 #endif /* CONFIG_NO_SCAN_PROCESSING */
701 static void wpa_supplicant_event_associnfo(struct wpa_supplicant
*wpa_s
,
702 union wpa_event_data
*data
)
704 int l
, len
, found
= 0, wpa_found
, rsn_found
;
707 wpa_printf(MSG_DEBUG
, "Association info event");
708 if (data
->assoc_info
.req_ies
)
709 wpa_hexdump(MSG_DEBUG
, "req_ies", data
->assoc_info
.req_ies
,
710 data
->assoc_info
.req_ies_len
);
711 if (data
->assoc_info
.resp_ies
)
712 wpa_hexdump(MSG_DEBUG
, "resp_ies", data
->assoc_info
.resp_ies
,
713 data
->assoc_info
.resp_ies_len
);
714 if (data
->assoc_info
.beacon_ies
)
715 wpa_hexdump(MSG_DEBUG
, "beacon_ies",
716 data
->assoc_info
.beacon_ies
,
717 data
->assoc_info
.beacon_ies_len
);
719 p
= data
->assoc_info
.req_ies
;
720 l
= data
->assoc_info
.req_ies_len
;
722 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
723 while (p
&& l
>= 2) {
726 wpa_hexdump(MSG_DEBUG
, "Truncated IE in assoc_info",
730 if ((p
[0] == WLAN_EID_VENDOR_SPECIFIC
&& p
[1] >= 6 &&
731 (os_memcmp(&p
[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
732 (p
[0] == WLAN_EID_RSN
&& p
[1] >= 2)) {
733 if (wpa_sm_set_assoc_wpa_ie(wpa_s
->wpa
, p
, len
))
736 wpa_find_assoc_pmkid(wpa_s
);
742 if (!found
&& data
->assoc_info
.req_ies
)
743 wpa_sm_set_assoc_wpa_ie(wpa_s
->wpa
, NULL
, 0);
745 /* WPA/RSN IE from Beacon/ProbeResp */
746 p
= data
->assoc_info
.beacon_ies
;
747 l
= data
->assoc_info
.beacon_ies_len
;
749 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
751 wpa_found
= rsn_found
= 0;
752 while (p
&& l
>= 2) {
755 wpa_hexdump(MSG_DEBUG
, "Truncated IE in beacon_ies",
760 p
[0] == WLAN_EID_VENDOR_SPECIFIC
&& p
[1] >= 6 &&
761 os_memcmp(&p
[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
763 wpa_sm_set_ap_wpa_ie(wpa_s
->wpa
, p
, len
);
767 p
[0] == WLAN_EID_RSN
&& p
[1] >= 2) {
769 wpa_sm_set_ap_rsn_ie(wpa_s
->wpa
, p
, len
);
776 if (!wpa_found
&& data
->assoc_info
.beacon_ies
)
777 wpa_sm_set_ap_wpa_ie(wpa_s
->wpa
, NULL
, 0);
778 if (!rsn_found
&& data
->assoc_info
.beacon_ies
)
779 wpa_sm_set_ap_rsn_ie(wpa_s
->wpa
, NULL
, 0);
780 if (wpa_found
|| rsn_found
)
781 wpa_s
->ap_ies_from_associnfo
= 1;
785 static void wpa_supplicant_event_assoc(struct wpa_supplicant
*wpa_s
,
786 union wpa_event_data
*data
)
789 int ft_completed
= wpa_ft_is_completed(wpa_s
->wpa
);
792 wpa_supplicant_event_associnfo(wpa_s
, data
);
794 wpa_supplicant_set_state(wpa_s
, WPA_ASSOCIATED
);
795 if (wpa_s
->use_client_mlme
)
796 os_memcpy(bssid
, wpa_s
->bssid
, ETH_ALEN
);
797 if (wpa_s
->use_client_mlme
||
798 (wpa_drv_get_bssid(wpa_s
, bssid
) >= 0 &&
799 os_memcmp(bssid
, wpa_s
->bssid
, ETH_ALEN
) != 0)) {
800 wpa_msg(wpa_s
, MSG_DEBUG
, "Associated to a new BSS: BSSID="
801 MACSTR
, MAC2STR(bssid
));
802 os_memcpy(wpa_s
->bssid
, bssid
, ETH_ALEN
);
803 os_memset(wpa_s
->pending_bssid
, 0, ETH_ALEN
);
804 if (wpa_supplicant_dynamic_keys(wpa_s
) && !ft_completed
) {
805 wpa_clear_keys(wpa_s
, bssid
);
807 if (wpa_supplicant_select_config(wpa_s
) < 0) {
808 wpa_supplicant_disassociate(
809 wpa_s
, WLAN_REASON_DEAUTH_LEAVING
);
814 wpa_msg(wpa_s
, MSG_INFO
, "Associated with " MACSTR
, MAC2STR(bssid
));
815 if (wpa_s
->current_ssid
) {
816 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
817 * initialized before association, but for other modes,
818 * initialize PC/SC here, if the current configuration needs
819 * smartcard or SIM/USIM. */
820 wpa_supplicant_scard_init(wpa_s
, wpa_s
->current_ssid
);
822 wpa_sm_notify_assoc(wpa_s
->wpa
, bssid
);
823 l2_packet_notify_auth_start(wpa_s
->l2
);
826 * Set portEnabled first to FALSE in order to get EAP state machine out
827 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
828 * state machine may transit to AUTHENTICATING state based on obsolete
829 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
830 * AUTHENTICATED without ever giving chance to EAP state machine to
834 eapol_sm_notify_portEnabled(wpa_s
->eapol
, FALSE
);
835 eapol_sm_notify_portValid(wpa_s
->eapol
, FALSE
);
837 if (wpa_key_mgmt_wpa_psk(wpa_s
->key_mgmt
) || ft_completed
)
838 eapol_sm_notify_eap_success(wpa_s
->eapol
, FALSE
);
839 /* 802.1X::portControl = Auto */
840 eapol_sm_notify_portEnabled(wpa_s
->eapol
, TRUE
);
841 wpa_s
->eapol_received
= 0;
842 if (wpa_s
->key_mgmt
== WPA_KEY_MGMT_NONE
||
843 wpa_s
->key_mgmt
== WPA_KEY_MGMT_WPA_NONE
) {
844 wpa_supplicant_cancel_auth_timeout(wpa_s
);
845 wpa_supplicant_set_state(wpa_s
, WPA_COMPLETED
);
846 } else if (!ft_completed
) {
847 /* Timeout for receiving the first EAPOL packet */
848 wpa_supplicant_req_auth_timeout(wpa_s
, 10, 0);
850 wpa_supplicant_cancel_scan(wpa_s
);
852 if (wpa_s
->driver_4way_handshake
&&
853 wpa_key_mgmt_wpa_psk(wpa_s
->key_mgmt
)) {
855 * We are done; the driver will take care of RSN 4-way
858 wpa_supplicant_cancel_auth_timeout(wpa_s
);
859 wpa_supplicant_set_state(wpa_s
, WPA_COMPLETED
);
860 eapol_sm_notify_portValid(wpa_s
->eapol
, TRUE
);
861 eapol_sm_notify_eap_success(wpa_s
->eapol
, TRUE
);
866 static void wpa_supplicant_event_disassoc(struct wpa_supplicant
*wpa_s
)
870 if (wpa_s
->key_mgmt
== WPA_KEY_MGMT_WPA_NONE
) {
872 * At least Host AP driver and a Prism3 card seemed to be
873 * generating streams of disconnected events when configuring
874 * IBSS for WPA-None. Ignore them for now.
876 wpa_printf(MSG_DEBUG
, "Disconnect event - ignore in "
877 "IBSS/WPA-None mode");
881 if (wpa_s
->wpa_state
== WPA_4WAY_HANDSHAKE
&&
882 wpa_key_mgmt_wpa_psk(wpa_s
->key_mgmt
)) {
883 wpa_msg(wpa_s
, MSG_INFO
, "WPA: 4-Way Handshake failed - "
884 "pre-shared key may be incorrect");
886 if (wpa_s
->wpa_state
>= WPA_ASSOCIATED
)
887 wpa_supplicant_req_scan(wpa_s
, 0, 100000);
888 bssid
= wpa_s
->bssid
;
889 if (is_zero_ether_addr(bssid
))
890 bssid
= wpa_s
->pending_bssid
;
891 wpa_blacklist_add(wpa_s
, bssid
);
892 wpa_sm_notify_disassoc(wpa_s
->wpa
);
893 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_DISCONNECTED
"- Disconnect event - "
895 if (wpa_supplicant_dynamic_keys(wpa_s
)) {
896 wpa_s
->keys_cleared
= 0;
897 wpa_clear_keys(wpa_s
, wpa_s
->bssid
);
899 wpa_supplicant_mark_disassoc(wpa_s
);
903 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
904 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx
,
907 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
909 if (!wpa_s
->pending_mic_error_report
)
912 wpa_printf(MSG_DEBUG
, "WPA: Sending pending MIC error report");
913 wpa_sm_key_request(wpa_s
->wpa
, 1, wpa_s
->pending_mic_error_pairwise
);
914 wpa_s
->pending_mic_error_report
= 0;
916 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
920 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant
*wpa_s
,
921 union wpa_event_data
*data
)
926 wpa_msg(wpa_s
, MSG_WARNING
, "Michael MIC failure detected");
927 pairwise
= (data
&& data
->michael_mic_failure
.unicast
);
929 if ((wpa_s
->last_michael_mic_error
&&
930 t
.sec
- wpa_s
->last_michael_mic_error
<= 60) ||
931 wpa_s
->pending_mic_error_report
) {
932 if (wpa_s
->pending_mic_error_report
) {
934 * Send the pending MIC error report immediately since
935 * we are going to start countermeasures and AP better
938 wpa_sm_key_request(wpa_s
->wpa
, 1,
939 wpa_s
->pending_mic_error_pairwise
);
942 /* Send the new MIC error report immediately since we are going
943 * to start countermeasures and AP better do the same.
945 wpa_sm_key_request(wpa_s
->wpa
, 1, pairwise
);
947 /* initialize countermeasures */
948 wpa_s
->countermeasures
= 1;
949 wpa_msg(wpa_s
, MSG_WARNING
, "TKIP countermeasures started");
952 * Need to wait for completion of request frame. We do not get
953 * any callback for the message completion, so just wait a
954 * short while and hope for the best. */
957 wpa_drv_set_countermeasures(wpa_s
, 1);
958 wpa_supplicant_deauthenticate(wpa_s
,
959 WLAN_REASON_MICHAEL_MIC_FAILURE
);
960 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures
,
962 eloop_register_timeout(60, 0,
963 wpa_supplicant_stop_countermeasures
,
965 /* TODO: mark the AP rejected for 60 second. STA is
966 * allowed to associate with another AP.. */
968 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
969 if (wpa_s
->mic_errors_seen
) {
971 * Reduce the effectiveness of Michael MIC error
972 * reports as a means for attacking against TKIP if
973 * more than one MIC failure is noticed with the same
974 * PTK. We delay the transmission of the reports by a
975 * random time between 0 and 60 seconds in order to
976 * force the attacker wait 60 seconds before getting
977 * the information on whether a frame resulted in a MIC
983 if (os_get_random(rval
, sizeof(rval
)) < 0)
984 sec
= os_random() % 60;
986 sec
= WPA_GET_BE32(rval
) % 60;
987 wpa_printf(MSG_DEBUG
, "WPA: Delay MIC error report %d "
989 wpa_s
->pending_mic_error_report
= 1;
990 wpa_s
->pending_mic_error_pairwise
= pairwise
;
991 eloop_cancel_timeout(
992 wpa_supplicant_delayed_mic_error_report
,
994 eloop_register_timeout(
995 sec
, os_random() % 1000000,
996 wpa_supplicant_delayed_mic_error_report
,
999 wpa_sm_key_request(wpa_s
->wpa
, 1, pairwise
);
1001 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1002 wpa_sm_key_request(wpa_s
->wpa
, 1, pairwise
);
1003 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1005 wpa_s
->last_michael_mic_error
= t
.sec
;
1006 wpa_s
->mic_errors_seen
++;
1011 wpa_supplicant_event_interface_status(struct wpa_supplicant
*wpa_s
,
1012 union wpa_event_data
*data
)
1014 if (os_strcmp(wpa_s
->ifname
, data
->interface_status
.ifname
) != 0)
1017 switch (data
->interface_status
.ievent
) {
1018 case EVENT_INTERFACE_ADDED
:
1019 if (!wpa_s
->interface_removed
)
1021 wpa_s
->interface_removed
= 0;
1022 wpa_printf(MSG_DEBUG
, "Configured interface was added.");
1023 if (wpa_supplicant_driver_init(wpa_s
) < 0) {
1024 wpa_printf(MSG_INFO
, "Failed to initialize the driver "
1025 "after interface was added.");
1028 case EVENT_INTERFACE_REMOVED
:
1029 wpa_printf(MSG_DEBUG
, "Configured interface was removed.");
1030 wpa_s
->interface_removed
= 1;
1031 wpa_supplicant_mark_disassoc(wpa_s
);
1032 l2_packet_deinit(wpa_s
->l2
);
1039 #ifdef CONFIG_PEERKEY
1041 wpa_supplicant_event_stkstart(struct wpa_supplicant
*wpa_s
,
1042 union wpa_event_data
*data
)
1046 wpa_sm_stkstart(wpa_s
->wpa
, data
->stkstart
.peer
);
1048 #endif /* CONFIG_PEERKEY */
1051 #ifdef CONFIG_IEEE80211R
1053 wpa_supplicant_event_ft_response(struct wpa_supplicant
*wpa_s
,
1054 union wpa_event_data
*data
)
1059 if (wpa_ft_process_response(wpa_s
->wpa
, data
->ft_ies
.ies
,
1060 data
->ft_ies
.ies_len
,
1061 data
->ft_ies
.ft_action
,
1062 data
->ft_ies
.target_ap
) < 0) {
1063 /* TODO: prevent MLME/driver from trying to associate? */
1066 #endif /* CONFIG_IEEE80211R */
1069 void wpa_supplicant_event(void *ctx
, wpa_event_type event
,
1070 union wpa_event_data
*data
)
1072 struct wpa_supplicant
*wpa_s
= ctx
;
1076 wpa_supplicant_event_assoc(wpa_s
, data
);
1078 case EVENT_DISASSOC
:
1079 wpa_supplicant_event_disassoc(wpa_s
);
1081 case EVENT_MICHAEL_MIC_FAILURE
:
1082 wpa_supplicant_event_michael_mic_failure(wpa_s
, data
);
1084 #ifndef CONFIG_NO_SCAN_PROCESSING
1085 case EVENT_SCAN_RESULTS
:
1086 wpa_supplicant_event_scan_results(wpa_s
);
1088 #endif /* CONFIG_NO_SCAN_PROCESSING */
1089 case EVENT_ASSOCINFO
:
1090 wpa_supplicant_event_associnfo(wpa_s
, data
);
1092 case EVENT_INTERFACE_STATUS
:
1093 wpa_supplicant_event_interface_status(wpa_s
, data
);
1095 case EVENT_PMKID_CANDIDATE
:
1096 wpa_supplicant_event_pmkid_candidate(wpa_s
, data
);
1098 #ifdef CONFIG_PEERKEY
1099 case EVENT_STKSTART
:
1100 wpa_supplicant_event_stkstart(wpa_s
, data
);
1102 #endif /* CONFIG_PEERKEY */
1103 #ifdef CONFIG_IEEE80211R
1104 case EVENT_FT_RESPONSE
:
1105 wpa_supplicant_event_ft_response(wpa_s
, data
);
1107 #endif /* CONFIG_IEEE80211R */
1109 wpa_printf(MSG_INFO
, "Unknown event %d", event
);