events.c

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <time.h>

#include "common.h"
#include "eapol_sm.h"
#include "wpa.h"
#include "eloop.h"
#include "wpa_supplicant.h"
#include "config.h"
#include "l2_packet.h"
#include "wpa_supplicant_i.h"
#include "pcsc_funcs.h"
#include "preauth.h"
#include "wpa_ctrl.h"
#include "eap.h"


static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
{
        struct wpa_ssid *ssid;

        if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
                return 0;

        ssid = wpa_supplicant_get_ssid(wpa_s);
        if (ssid == NULL) {
                wpa_printf(MSG_INFO, "No network configuration found for the "
                           "current AP");
                return -1;
        }

        if (ssid->disabled) {
                wpa_printf(MSG_DEBUG, "Selected network is disabled");
                return -1;
        }

        wpa_printf(MSG_DEBUG, "Network configuration found for the current "
                   "AP");
        if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
                              WPA_KEY_MGMT_WPA_NONE)) {
                u8 wpa_ie[80];
                size_t wpa_ie_len = sizeof(wpa_ie);
                wpa_supplicant_set_suites(wpa_s, NULL, ssid,
                                          wpa_ie, &wpa_ie_len);
        } else {
                wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
        }

        wpa_s->current_ssid = ssid;
        wpa_sm_set_config(wpa_s->wpa, wpa_s->current_ssid);
        wpa_supplicant_initiate_eapol(wpa_s);

        return 0;
}


static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
                                                void *sock_ctx)
{
        struct wpa_supplicant *wpa_s = eloop_ctx;

        if (wpa_s->countermeasures) {
                wpa_s->countermeasures = 0;
                wpa_drv_set_countermeasures(wpa_s, 0);
                wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
                wpa_supplicant_req_scan(wpa_s, 0, 0);
        }
}


static void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
{
        wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
        memset(wpa_s->bssid, 0, ETH_ALEN);
        eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
        eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
                eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
}


static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
{
        struct wpa_ie_data ie;
        int i, pmksa_set = -1;

        if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
            ie.pmkid == NULL)
                return;

        for (i = 0; i < ie.num_pmkid; i++) {
                pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
                                                    ie.pmkid + i * PMKID_LEN,
                                                    NULL, NULL, 0);
                if (pmksa_set == 0) {
                        eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
                        break;
                }
        }

        wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
                   "cache", pmksa_set == 0 ? "" : "not ");
}


static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
                                                 union wpa_event_data *data)
{
        if (data == NULL) {
                wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
                return;
        }
        wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
                   " index=%d preauth=%d",
                   MAC2STR(data->pmkid_candidate.bssid),
                   data->pmkid_candidate.index,
                   data->pmkid_candidate.preauth);

        pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
                            data->pmkid_candidate.index,
                            data->pmkid_candidate.preauth);
}


static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
{
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
            wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
                return 0;

        if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
            wpa_s->current_ssid &&
            !(wpa_s->current_ssid->eapol_flags &
              (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
               EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
                /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
                 * plaintext or static WEP keys). */
                return 0;
        }

        return 1;
}


int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
                              struct wpa_ssid *ssid)
{
        int aka = 0, sim = 0, type;

        if (ssid->pcsc == NULL || wpa_s->scard != NULL)
                return 0;

        if (ssid->eap_methods == NULL) {
                sim = 1;
                aka = 1;
        } else {
                u8 *eap = ssid->eap_methods;
                while (*eap != EAP_TYPE_NONE) {
                        if (*eap == EAP_TYPE_SIM)
                                sim = 1;
                        else if (*eap == EAP_TYPE_AKA)
                                aka = 1;
                        eap++;
                }
        }

#ifndef EAP_SIM
        sim = 0;
#endif /* EAP_SIM */
#ifndef EAP_AKA
        aka = 0;
#endif /* EAP_AKA */

        if (!sim && !aka) {
                wpa_printf(MSG_DEBUG, "Selected network is configured to use "
                           "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
                return 0;
        }

        wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
                   "(sim=%d aka=%d) - initialize PCSC", sim, aka);
        if (sim && aka)
                type = SCARD_TRY_BOTH;
        else if (aka)
                type = SCARD_USIM_ONLY;
        else
                type = SCARD_GSM_SIM_ONLY;

        wpa_s->scard = scard_init(type);
        if (wpa_s->scard == NULL) {
                wpa_printf(MSG_WARNING, "Failed to initialize SIM "
                           "(pcsc-lite)");
                return -1;
        }
        wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
        eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);

        return 0;
}


static int wpa_supplicant_match_privacy(struct wpa_scan_result *bss,
                                        struct wpa_ssid *ssid)
{
        int i, privacy = 0;

        for (i = 0; i < NUM_WEP_KEYS; i++) {
                if (ssid->wep_key_len[i]) {
                        privacy = 1;
                        break;
                }
        }
        if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
            ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
                                 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
                privacy = 1;

        if (bss->caps & IEEE80211_CAP_PRIVACY)
                return privacy;
        return !privacy;
}


static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
                                         struct wpa_scan_result *bss)
{
        struct wpa_ie_data ie;
        int proto_match = 0;

        while ((ssid->proto & WPA_PROTO_RSN) && bss->rsn_ie_len > 0) {
                proto_match++;

                if (wpa_parse_wpa_ie(bss->rsn_ie, bss->rsn_ie_len, &ie)) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
                        break;
                }
                if (!(ie.proto & ssid->proto)) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
                                   "mismatch");
                        break;
                }

                if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
                                   "mismatch");
                        break;
                }

                if (!(ie.group_cipher & ssid->group_cipher)) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
                                   "mismatch");
                        break;
                }

                if (!(ie.key_mgmt & ssid->key_mgmt)) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
                                   "mismatch");
                        break;
                }

                wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
                return 1;
        }

        while ((ssid->proto & WPA_PROTO_WPA) && bss->wpa_ie_len > 0) {
                proto_match++;

                if (wpa_parse_wpa_ie(bss->wpa_ie, bss->wpa_ie_len, &ie)) {
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
                        break;
                }
                if (!(ie.proto & ssid->proto)) {
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
                                   "mismatch");
                        break;
                }

                if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
                                   "mismatch");
                        break;
                }

                if (!(ie.group_cipher & ssid->group_cipher)) {
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
                                   "mismatch");
                        break;
                }

                if (!(ie.key_mgmt & ssid->key_mgmt)) {
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
                                   "mismatch");
                        break;
                }

                wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
                return 1;
        }

        if (proto_match == 0)
                wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");

        return 0;
}


static struct wpa_scan_result *
wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
                          struct wpa_scan_result *results, int num,
                          struct wpa_ssid **selected_ssid)
{
        struct wpa_ssid *ssid;
        struct wpa_scan_result *bss, *selected = NULL;
        int i;
        struct wpa_blacklist *e;

        wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
                   group->priority);

        bss = NULL;
        ssid = NULL;
        /* First, try to find WPA-enabled AP */
        for (i = 0; i < num && !selected; i++) {
                bss = &results[i];
                wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
                           "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x",
                           i, MAC2STR(bss->bssid),
                           wpa_ssid_txt(bss->ssid, bss->ssid_len),
                           (unsigned long) bss->wpa_ie_len,
                           (unsigned long) bss->rsn_ie_len, bss->caps);
                if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
                    e->count > 1) {
                        wpa_printf(MSG_DEBUG, "   skip - blacklisted");
                        continue;
                }

                if (bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0) {
                        wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
                        continue;
                }

                for (ssid = group; ssid; ssid = ssid->pnext) {
                        if (ssid->disabled)
                                continue;
                        if (bss->ssid_len != ssid->ssid_len ||
                            memcmp(bss->ssid, ssid->ssid,
                                   bss->ssid_len) != 0) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "SSID mismatch");
                                continue;
                        }
                        if (ssid->bssid_set &&
                            memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "BSSID mismatch");
                                continue;
                        }
                        if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
                                selected = bss;
                                *selected_ssid = ssid;
                                break;
                        }
                }
        }

        /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
         * allows this. */
        for (i = 0; i < num && !selected; i++) {
                bss = &results[i];
                if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
                    e->count > 1) {
                        continue;
                }
                for (ssid = group; ssid; ssid = ssid->pnext) {
                        if (!ssid->disabled &&
                            (ssid->ssid_len == 0 ||
                             (bss->ssid_len == ssid->ssid_len &&
                              memcmp(bss->ssid, ssid->ssid, bss->ssid_len) ==
                              0)) &&
                            (!ssid->bssid_set ||
                             memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0) &&
                            ((ssid->key_mgmt & WPA_KEY_MGMT_NONE) ||
                             (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
                            && bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0 &&
                            wpa_supplicant_match_privacy(bss, ssid) &&
                            !(bss->caps & IEEE80211_CAP_IBSS))
                        {
                                selected = bss;
                                *selected_ssid = ssid;
                                wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
                                           MACSTR " ssid='%s'",
                                           MAC2STR(bss->bssid),
                                           wpa_ssid_txt(bss->ssid,
                                                        bss->ssid_len));
                                break;
                        }
                }
        }

        return selected;
}


static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
{
        int num, prio;
        struct wpa_scan_result *selected = NULL;
        struct wpa_ssid *ssid = NULL;
        struct wpa_scan_result *results;

        if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
                if (wpa_s->conf->ap_scan == 2)
                        return;
                wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
                           "scanning again");
                wpa_supplicant_req_scan(wpa_s, 1, 0);
                return;
        }
        if (wpa_s->conf->ap_scan == 2)
                return;
        results = wpa_s->scan_results;
        num = wpa_s->num_scan_results;

        while (selected == NULL) {
                for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
                        selected = wpa_supplicant_select_bss(
                                wpa_s, wpa_s->conf->pssid[prio], results, num,
                                &ssid);
                        if (selected)
                                break;
                }

                if (selected == NULL && wpa_s->blacklist) {
                        wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
                                   "and try again");
                        wpa_blacklist_clear(wpa_s);
                } else if (selected == NULL) {
                        break;
                }
        }

        if (selected) {
                if (wpa_s->reassociate ||
                    memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0) {
                        if (wpa_supplicant_scard_init(wpa_s, ssid)) {
                                wpa_supplicant_req_scan(wpa_s, 10, 0);
                                return;
                        }
                        wpa_supplicant_associate(wpa_s, selected, ssid);
                } else {
                        wpa_printf(MSG_DEBUG, "Already associated with the "
                                   "selected AP.");
                }
                rsn_preauth_scan_results(wpa_s->wpa, results, num);
        } else {
                wpa_printf(MSG_DEBUG, "No suitable AP found.");
                wpa_supplicant_req_scan(wpa_s, 5, 0);
        }
}


static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
                                           union wpa_event_data *data)
{
        int l, len, found = 0, wpa_found, rsn_found;
        u8 *p;

        wpa_printf(MSG_DEBUG, "Association info event");
        if (data->assoc_info.req_ies)
                wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
                            data->assoc_info.req_ies_len);
        if (data->assoc_info.resp_ies)
                wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
                            data->assoc_info.resp_ies_len);
        if (data->assoc_info.beacon_ies)
                wpa_hexdump(MSG_DEBUG, "beacon_ies",
                            data->assoc_info.beacon_ies,
                            data->assoc_info.beacon_ies_len);

        p = data->assoc_info.req_ies;
        l = data->assoc_info.req_ies_len;

        /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
        while (p && l >= 2) {
                len = p[1] + 2;
                if (len > l) {
                        wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
                                    p, l);
                        break;
                }
                if ((p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
                     (memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
                    (p[0] == RSN_INFO_ELEM && p[1] >= 2)) {
                        if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
                                break;
                        found = 1;
                        wpa_find_assoc_pmkid(wpa_s);
                        break;
                }
                l -= len;
                p += len;
        }
        if (!found && data->assoc_info.req_ies)
                wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);

        /* WPA/RSN IE from Beacon/ProbeResp */
        p = data->assoc_info.beacon_ies;
        l = data->assoc_info.beacon_ies_len;

        /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
         */
        wpa_found = rsn_found = 0;
        while (p && l >= 2) {
                len = p[1] + 2;
                if (len > l) {
                        wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
                                    p, l);
                        break;
                }
                if (!wpa_found &&
                    p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
                    memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
                        wpa_found = 1;
                        wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
                }

                if (!rsn_found &&
                    p[0] == RSN_INFO_ELEM && p[1] >= 2) {
                        rsn_found = 1;
                        wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
                }

                l -= len;
                p += len;
        }

        if (!wpa_found && data->assoc_info.beacon_ies)
                wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
        if (!rsn_found && data->assoc_info.beacon_ies)
                wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
}


static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
                                       union wpa_event_data *data)
{
        u8 bssid[ETH_ALEN];

        if (data)
                wpa_supplicant_event_associnfo(wpa_s, data);

        wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
        if (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
            memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
                wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
                        MACSTR, MAC2STR(bssid));
                memcpy(wpa_s->bssid, bssid, ETH_ALEN);
                if (wpa_supplicant_dynamic_keys(wpa_s)) {
                        wpa_clear_keys(wpa_s, bssid);
                }
                if (wpa_supplicant_select_config(wpa_s) < 0) {
                        wpa_supplicant_disassociate(wpa_s,
                                                    REASON_DEAUTH_LEAVING);
                        return;
                }
        }

        wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
        if (wpa_s->current_ssid) {
                /* When using scanning (ap_scan=1), SIM PC/SC interface can be
                 * initialized before association, but for other modes,
                 * initialize PC/SC here, if the current configuration needs
                 * smartcard or SIM/USIM. */
                wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
        }
        wpa_sm_notify_assoc(wpa_s->wpa, bssid);
        l2_packet_notify_auth_start(wpa_s->l2);

        /*
         * Set portEnabled first to FALSE in order to get EAP state machine out
         * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
         * state machine may transit to AUTHENTICATING state based on obsolete
         * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
         * AUTHENTICATED without ever giving chance to EAP state machine to
         * reset the state.
         */
        eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
        eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
                eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
        /* 802.1X::portControl = Auto */
        eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
        wpa_s->eapol_received = 0;
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
            wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
                wpa_supplicant_cancel_auth_timeout(wpa_s);
                wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
        } else {
                /* Timeout for receiving the first EAPOL packet */
                wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
        }
}


static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
{
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
                /*
                 * At least Host AP driver and a Prism3 card seemed to be
                 * generating streams of disconnected events when configuring
                 * IBSS for WPA-None. Ignore them for now.
                 */
                wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
                           "IBSS/WPA-None mode");
                return;
        }

        if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
            wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) {
                wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
                        "pre-shared key may be incorrect");
        }
        if (wpa_s->wpa_state >= WPA_ASSOCIATED)
                wpa_supplicant_req_scan(wpa_s, 0, 100000);
        wpa_blacklist_add(wpa_s, wpa_s->bssid);
        wpa_sm_notify_disassoc(wpa_s->wpa);
        wpa_supplicant_mark_disassoc(wpa_s);
        wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
                "remove keys");
        if (wpa_supplicant_dynamic_keys(wpa_s)) {
                wpa_s->keys_cleared = 0;
                wpa_clear_keys(wpa_s, wpa_s->bssid);
        }
}


static void
wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
                                         union wpa_event_data *data)
{
        int pairwise;
        time_t now;

        wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
        pairwise = (data && data->michael_mic_failure.unicast);
        wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
        time(&now);
        if (wpa_s->last_michael_mic_error &&
            now - wpa_s->last_michael_mic_error <= 60) {
                /* initialize countermeasures */
                wpa_s->countermeasures = 1;
                wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");

                /*
                 * Need to wait for completion of request frame. We do not get
                 * any callback for the message completion, so just wait a
                 * short while and hope for the best. */
                usleep(10000);

                wpa_drv_set_countermeasures(wpa_s, 1);
                wpa_supplicant_deauthenticate(wpa_s,
                                              REASON_MICHAEL_MIC_FAILURE);
                eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
                                     wpa_s, NULL);
                eloop_register_timeout(60, 0,
                                       wpa_supplicant_stop_countermeasures,
                                       wpa_s, NULL);
                /* TODO: mark the AP rejected for 60 second. STA is
                 * allowed to associate with another AP.. */
        }
        wpa_s->last_michael_mic_error = now;
}


static void
wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
                                      union wpa_event_data *data)
{
        if (strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
                return;

        switch (data->interface_status.ievent) {
        case EVENT_INTERFACE_ADDED:
                if (!wpa_s->interface_removed)
                        break;
                wpa_s->interface_removed = 0;
                wpa_printf(MSG_DEBUG, "Configured interface was added.");
                if (wpa_supplicant_driver_init(wpa_s, 1) < 0) {
                        wpa_printf(MSG_INFO, "Failed to initialize the driver "
                                   "after interface was added.");
                }
                break;
        case EVENT_INTERFACE_REMOVED:
                wpa_printf(MSG_DEBUG, "Configured interface was removed.");
                wpa_s->interface_removed = 1;
                wpa_supplicant_mark_disassoc(wpa_s);
                l2_packet_deinit(wpa_s->l2);
                wpa_s->l2 = NULL;
                break;
        }
}


void wpa_supplicant_event(struct wpa_supplicant *wpa_s, wpa_event_type event,
                          union wpa_event_data *data)
{
        switch (event) {
        case EVENT_ASSOC:
                wpa_supplicant_event_assoc(wpa_s, data);
                break;
        case EVENT_DISASSOC:
                wpa_supplicant_event_disassoc(wpa_s);
                break;
        case EVENT_MICHAEL_MIC_FAILURE:
                wpa_supplicant_event_michael_mic_failure(wpa_s, data);
                break;
        case EVENT_SCAN_RESULTS:
                wpa_supplicant_event_scan_results(wpa_s);
                break;
        case EVENT_ASSOCINFO:
                wpa_supplicant_event_associnfo(wpa_s, data);
                break;
        case EVENT_INTERFACE_STATUS:
                wpa_supplicant_event_interface_status(wpa_s, data);
                break;
        case EVENT_PMKID_CANDIDATE:
                wpa_supplicant_event_pmkid_candidate(wpa_s, data);
                break;
        default:
                wpa_printf(MSG_INFO, "Unknown event %d", event);
                break;
        }
}

---