mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-27 01:38:37 -05:00
7ffe7d222a
Wall time jumps shouldn't affect MMIC failure/TKIP countermeasures, so use monotonic time. Change the michael_mic_failure variable to struct os_reltime for type-safety. Signed-hostap: Johannes Berg <johannes.berg@intel.com>
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*
|
|
* hostapd / TKIP countermeasures
|
|
* Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
|
|
*
|
|
* This software may be distributed under the terms of the BSD license.
|
|
* See README for more details.
|
|
*/
|
|
|
|
#include "utils/includes.h"
|
|
|
|
#include "utils/common.h"
|
|
#include "utils/eloop.h"
|
|
#include "common/ieee802_11_defs.h"
|
|
#include "radius/radius.h"
|
|
#include "hostapd.h"
|
|
#include "sta_info.h"
|
|
#include "ap_mlme.h"
|
|
#include "wpa_auth.h"
|
|
#include "ap_drv_ops.h"
|
|
#include "tkip_countermeasures.h"
|
|
|
|
|
|
static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
|
|
void *timeout_ctx)
|
|
{
|
|
struct hostapd_data *hapd = eloop_ctx;
|
|
hapd->tkip_countermeasures = 0;
|
|
hostapd_drv_set_countermeasures(hapd, 0);
|
|
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
|
|
HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
|
|
}
|
|
|
|
|
|
static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
|
|
{
|
|
struct sta_info *sta;
|
|
|
|
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
|
|
HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
|
|
|
|
wpa_auth_countermeasures_start(hapd->wpa_auth);
|
|
hapd->tkip_countermeasures = 1;
|
|
hostapd_drv_set_countermeasures(hapd, 1);
|
|
wpa_gtk_rekey(hapd->wpa_auth);
|
|
eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
|
|
eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
|
|
hapd, NULL);
|
|
while ((sta = hapd->sta_list)) {
|
|
sta->acct_terminate_cause =
|
|
RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET;
|
|
if (sta->flags & WLAN_STA_AUTH) {
|
|
mlme_deauthenticate_indication(
|
|
hapd, sta,
|
|
WLAN_REASON_MICHAEL_MIC_FAILURE);
|
|
}
|
|
hostapd_drv_sta_deauth(hapd, sta->addr,
|
|
WLAN_REASON_MICHAEL_MIC_FAILURE);
|
|
ap_free_sta(hapd, sta);
|
|
}
|
|
}
|
|
|
|
|
|
void ieee80211_tkip_countermeasures_deinit(struct hostapd_data *hapd)
|
|
{
|
|
eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
|
|
}
|
|
|
|
|
|
int michael_mic_failure(struct hostapd_data *hapd, const u8 *addr, int local)
|
|
{
|
|
struct os_reltime now;
|
|
int ret = 0;
|
|
|
|
if (addr && local) {
|
|
struct sta_info *sta = ap_get_sta(hapd, addr);
|
|
if (sta != NULL) {
|
|
wpa_auth_sta_local_mic_failure_report(sta->wpa_sm);
|
|
hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
|
|
HOSTAPD_LEVEL_INFO,
|
|
"Michael MIC failure detected in "
|
|
"received frame");
|
|
mlme_michaelmicfailure_indication(hapd, addr);
|
|
} else {
|
|
wpa_printf(MSG_DEBUG,
|
|
"MLME-MICHAELMICFAILURE.indication "
|
|
"for not associated STA (" MACSTR
|
|
") ignored", MAC2STR(addr));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
os_get_reltime(&now);
|
|
if (os_reltime_expired(&now, &hapd->michael_mic_failure, 60)) {
|
|
hapd->michael_mic_failures = 1;
|
|
} else {
|
|
hapd->michael_mic_failures++;
|
|
if (hapd->michael_mic_failures > 1) {
|
|
ieee80211_tkip_countermeasures_start(hapd);
|
|
ret = 1;
|
|
}
|
|
}
|
|
hapd->michael_mic_failure = now;
|
|
|
|
return ret;
|
|
}
|