events.c

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/*
 * WPA Supplicant - Driver event processing
 * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "eloop.h"
#include "config.h"
#include "l2_packet/l2_packet.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "pcsc_funcs.h"
#include "rsn_supp/preauth.h"
#include "rsn_supp/pmksa_cache.h"
#include "common/wpa_ctrl.h"
#include "eap_peer/eap.h"
#include "ap/hostapd.h"
#include "notify.h"
#include "common/ieee802_11_defs.h"
#include "blacklist.h"
#include "wpas_glue.h"
#include "wps_supplicant.h"
#include "ibss_rsn.h"
#include "sme.h"
#include "bgscan.h"
#include "ap.h"
#include "bss.h"
#include "mlme.h"
#include "scan.h"


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

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

        wpa_printf(MSG_DEBUG, "Select network based on association "
                   "information");
        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 |
                              WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
                              WPA_KEY_MGMT_PSK_SHA256 |
                              WPA_KEY_MGMT_IEEE8021X_SHA256)) {
                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);
        }

        if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
                eapol_sm_invalidate_cached_session(wpa_s->eapol);
        old_ssid = wpa_s->current_ssid;
        wpa_s->current_ssid = ssid;
        wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
        wpa_supplicant_initiate_eapol(wpa_s);
        if (old_ssid != wpa_s->current_ssid)
                wpas_notify_network_changed(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);
        }
}


void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
{
        int bssid_changed;

        wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
        bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
        os_memset(wpa_s->bssid, 0, ETH_ALEN);
        os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
        wpa_s->current_bss = NULL;
        if (bssid_changed)
                wpas_notify_bssid_changed(wpa_s);

        eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
        eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
        if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
                eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
        wpa_s->ap_ies_from_associnfo = 0;
}


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

        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;

#ifdef IEEE8021X_EAPOL
        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;
        }
#endif /* IEEE8021X_EAPOL */

        return 1;
}


int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
                              struct wpa_ssid *ssid)
{
#ifdef IEEE8021X_EAPOL
        int aka = 0, sim = 0, type;

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

        if (ssid->eap.eap_methods == NULL) {
                sim = 1;
                aka = 1;
        } else {
                struct eap_method_type *eap = ssid->eap.eap_methods;
                while (eap->vendor != EAP_VENDOR_IETF ||
                       eap->method != EAP_TYPE_NONE) {
                        if (eap->vendor == EAP_VENDOR_IETF) {
                                if (eap->method == EAP_TYPE_SIM)
                                        sim = 1;
                                else if (eap->method == EAP_TYPE_AKA)
                                        aka = 1;
                        }
                        eap++;
                }
        }

        if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
                sim = 0;
        if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
                aka = 0;

        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);
#endif /* IEEE8021X_EAPOL */

        return 0;
}


#ifndef CONFIG_NO_SCAN_PROCESSING
static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
                                        struct wpa_ssid *ssid)
{
        int i, privacy = 0;

        if (ssid->mixed_cell)
                return 1;

#ifdef CONFIG_WPS
        if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
                return 1;
#endif /* CONFIG_WPS */

        for (i = 0; i < NUM_WEP_KEYS; i++) {
                if (ssid->wep_key_len[i]) {
                        privacy = 1;
                        break;
                }
        }
#ifdef IEEE8021X_EAPOL
        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;
#endif /* IEEE8021X_EAPOL */

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


static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
                                         struct wpa_ssid *ssid,
                                         struct wpa_scan_res *bss)
{
        struct wpa_ie_data ie;
        int proto_match = 0;
        const u8 *rsn_ie, *wpa_ie;
        int ret;

        ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
        if (ret >= 0)
                return ret;

        rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
        while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
                proto_match++;

                if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &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;
                }

#ifdef CONFIG_IEEE80211W
                if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
                    ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
                                   "protection");
                        break;
                }
#endif /* CONFIG_IEEE80211W */

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

        wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
        while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
                proto_match++;

                if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &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 int freq_allowed(int *freqs, int freq)
{
        int i;

        if (freqs == NULL)
                return 1;

        for (i = 0; freqs[i]; i++)
                if (freqs[i] == freq)
                        return 1;
        return 0;
}


static struct wpa_bss *
wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
                              struct wpa_scan_results *scan_res,
                              struct wpa_ssid *group,
                              struct wpa_ssid **selected_ssid)
{
        struct wpa_ssid *ssid;
        struct wpa_scan_res *bss;
        size_t i;
        struct wpa_blacklist *e;
        const u8 *ie;

        wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
        for (i = 0; i < scan_res->num; i++) {
                const u8 *ssid_;
                u8 wpa_ie_len, rsn_ie_len, ssid_len;
                bss = scan_res->res[i];

                ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
                ssid_ = ie ? ie + 2 : (u8 *) "";
                ssid_len = ie ? ie[1] : 0;

                ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
                wpa_ie_len = ie ? ie[1] : 0;

                ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
                rsn_ie_len = ie ? ie[1] : 0;

                wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
                           "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
                           (int) i, MAC2STR(bss->bssid),
                           wpa_ssid_txt(ssid_, ssid_len),
                           wpa_ie_len, rsn_ie_len, bss->caps);

                e = wpa_blacklist_get(wpa_s, bss->bssid);
                if (e && e->count > 1) {
                        wpa_printf(MSG_DEBUG, "   skip - blacklisted");
                        continue;
                }

                if (ssid_len == 0) {
                        wpa_printf(MSG_DEBUG, "   skip - SSID not known");
                        continue;
                }

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

                for (ssid = group; ssid; ssid = ssid->pnext) {
                        int check_ssid = 1;

                        if (ssid->disabled) {
                                wpa_printf(MSG_DEBUG, "   skip - disabled");
                                continue;
                        }

#ifdef CONFIG_WPS
                        if (ssid->ssid_len == 0 &&
                            wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
                                check_ssid = 0;
#endif /* CONFIG_WPS */

                        if (check_ssid &&
                            (ssid_len != ssid->ssid_len ||
                             os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "SSID mismatch");
                                continue;
                        }

                        if (ssid->bssid_set &&
                            os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
                        {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "BSSID mismatch");
                                continue;
                        }

                        if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
                                continue;

                        if (!freq_allowed(ssid->freq_list, bss->freq)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "frequency not allowed");
                                continue;
                        }

                        wpa_printf(MSG_DEBUG, "   selected WPA AP "
                                   MACSTR " ssid='%s'",
                                   MAC2STR(bss->bssid),
                                   wpa_ssid_txt(ssid_, ssid_len));
                        *selected_ssid = ssid;
                        return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
                }
        }

        return NULL;
}


static struct wpa_bss *
wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
                                  struct wpa_scan_results *scan_res,
                                  struct wpa_ssid *group,
                                  struct wpa_ssid **selected_ssid)
{
        struct wpa_ssid *ssid;
        struct wpa_scan_res *bss;
        size_t i;
        struct wpa_blacklist *e;
        const u8 *ie;

        wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
        for (i = 0; i < scan_res->num; i++) {
                const u8 *ssid_;
                u8 wpa_ie_len, rsn_ie_len, ssid_len;
                bss = scan_res->res[i];

                ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
                ssid_ = ie ? ie + 2 : (u8 *) "";
                ssid_len = ie ? ie[1] : 0;

                ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
                wpa_ie_len = ie ? ie[1] : 0;

                ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
                rsn_ie_len = ie ? ie[1] : 0;

                wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
                           "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
                           (int) i, MAC2STR(bss->bssid),
                           wpa_ssid_txt(ssid_, ssid_len),
                           wpa_ie_len, rsn_ie_len, bss->caps);

                e = wpa_blacklist_get(wpa_s, bss->bssid);
                if (e && e->count > 1) {
                        wpa_printf(MSG_DEBUG, "   skip - blacklisted");
                        continue;
                }

                if (ssid_len == 0) {
                        wpa_printf(MSG_DEBUG, "   skip - SSID not known");
                        continue;
                }

                for (ssid = group; ssid; ssid = ssid->pnext) {
                        int check_ssid = ssid->ssid_len != 0;

                        if (ssid->disabled) {
                                wpa_printf(MSG_DEBUG, "   skip - disabled");
                                continue;
                        }

#ifdef CONFIG_WPS
                        if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
                                /* Only allow wildcard SSID match if an AP
                                 * advertises active WPS operation that matches
                                 * with our mode. */
                                check_ssid = 1;
                                if (ssid->ssid_len == 0 &&
                                    wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
                                                              bss))
                                        check_ssid = 0;
                        }
#endif /* CONFIG_WPS */

                        if (check_ssid &&
                            (ssid_len != ssid->ssid_len ||
                             os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "SSID mismatch");
                                continue;
                        }

                        if (ssid->bssid_set &&
                            os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
                        {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "BSSID mismatch");
                                continue;
                        }

                        if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
                            !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
                            !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
                        {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "non-WPA network not allowed");
                                continue;
                        }

                        if ((ssid->key_mgmt &
                             (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
                              WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
                              WPA_KEY_MGMT_IEEE8021X_SHA256 |
                              WPA_KEY_MGMT_PSK_SHA256)) &&
                            (wpa_ie_len != 0 || rsn_ie_len != 0)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "WPA network");
                                continue;
                        }

                        if (!wpa_supplicant_match_privacy(bss, ssid)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "privacy mismatch");
                                continue;
                        }

                        if (bss->caps & IEEE80211_CAP_IBSS) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "IBSS (adhoc) network");
                                continue;
                        }

                        if (!freq_allowed(ssid->freq_list, bss->freq)) {
                                wpa_printf(MSG_DEBUG, "   skip - "
                                           "frequency not allowed");
                                continue;
                        }

                        wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
                                   MACSTR " ssid='%s'",
                                   MAC2STR(bss->bssid),
                                   wpa_ssid_txt(ssid_, ssid_len));
                        *selected_ssid = ssid;
                        return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
                }
        }

        return NULL;
}


static struct wpa_bss *
wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
                          struct wpa_scan_results *scan_res,
                          struct wpa_ssid *group,
                          struct wpa_ssid **selected_ssid)
{
        struct wpa_bss *selected;

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

        /* First, try to find WPA-enabled AP */
        selected = wpa_supplicant_select_bss_wpa(wpa_s, scan_res, group,
                                                 selected_ssid);
        if (selected)
                return selected;

        /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
         * allows this. */
        return wpa_supplicant_select_bss_non_wpa(wpa_s, scan_res, group,
                                                 selected_ssid);
}


static struct wpa_bss *
wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
                            struct wpa_scan_results *scan_res,
                            struct wpa_ssid **selected_ssid)
{
        struct wpa_bss *selected = NULL;
        int prio;

        while (selected == NULL) {
                for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
                        selected = wpa_supplicant_select_bss(
                                wpa_s, scan_res, wpa_s->conf->pssid[prio],
                                selected_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);
                        wpa_s->blacklist_cleared++;
                } else if (selected == NULL)
                        break;
        }

        return selected;
}


static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
                                        int timeout_sec, int timeout_usec)
{
        if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
                /*
                 * Quick recovery if the initial scan results were not
                 * complete when fetched before the first scan request.
                 */
                wpa_s->scan_res_tried++;
                timeout_sec = 0;
                timeout_usec = 0;
        } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
                /*
                 * No networks are enabled; short-circuit request so
                 * we don't wait timeout seconds before transitioning
                 * to INACTIVE state.
                 */
                wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
                return;
        }
        wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
}


void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
                            struct wpa_bss *selected,
                            struct wpa_ssid *ssid)
{
        if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
                wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
                        "PBC session overlap");
                wpa_supplicant_req_new_scan(wpa_s, 10, 0);
                return;
        }

        /*
         * Do not trigger new association unless the BSSID has changed or if
         * reassociation is requested. If we are in process of associating with
         * the selected BSSID, do not trigger new attempt.
         */
        if (wpa_s->reassociate ||
            (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
             (wpa_s->wpa_state != WPA_ASSOCIATING ||
              os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
              0))) {
                if (wpa_supplicant_scard_init(wpa_s, ssid)) {
                        wpa_supplicant_req_new_scan(wpa_s, 10, 0);
                        return;
                }
                wpa_supplicant_associate(wpa_s, selected, ssid);
        } else {
                wpa_printf(MSG_DEBUG, "Already associated with the selected "
                           "AP");
        }
}


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

        for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
                for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
                {
                        if (ssid->disabled)
                                continue;
                        if (ssid->mode == IEEE80211_MODE_IBSS ||
                            ssid->mode == IEEE80211_MODE_AP)
                                return ssid;
                }
        }
        return NULL;
}


/* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
 * on BSS added and BSS changed events */
static void wpa_supplicant_rsn_preauth_scan_results(
        struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res)
{
        int i;

        if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
                return;

        for (i = scan_res->num - 1; i >= 0; i--) {
                const u8 *ssid, *rsn;
                struct wpa_scan_res *r;

                r = scan_res->res[i];

                ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
                if (ssid == NULL)
                        continue;

                rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
                if (rsn == NULL)
                        continue;

                rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
        }

}


static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
                                       struct wpa_bss *selected,
                                       struct wpa_ssid *ssid,
                                       struct wpa_scan_results *scan_res)
{
        size_t i;
        struct wpa_scan_res *current_bss = NULL;
        int min_diff;

        if (wpa_s->reassociate)
                return 1; /* explicit request to reassociate */
        if (wpa_s->wpa_state < WPA_ASSOCIATED)
                return 1; /* we are not associated; continue */
        if (wpa_s->current_ssid == NULL)
                return 1; /* unknown current SSID */
        if (wpa_s->current_ssid != ssid)
                return 1; /* different network block */

        for (i = 0; i < scan_res->num; i++) {
                struct wpa_scan_res *res = scan_res->res[i];
                const u8 *ie;
                if (os_memcmp(res->bssid, wpa_s->bssid, ETH_ALEN) != 0)
                        continue;

                ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
                if (ie == NULL)
                        continue;
                if (ie[1] != wpa_s->current_ssid->ssid_len ||
                    os_memcmp(ie + 2, wpa_s->current_ssid->ssid, ie[1]) != 0)
                        continue;
                current_bss = res;
                break;
        }

        if (!current_bss)
                return 1; /* current BSS not seen in scan results */

        wpa_printf(MSG_DEBUG, "Considering within-ESS reassociation");
        wpa_printf(MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
                   MAC2STR(current_bss->bssid), current_bss->level);
        wpa_printf(MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
                   MAC2STR(selected->bssid), selected->level);

        if (wpa_s->current_ssid->bssid_set &&
            os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
            0) {
                wpa_printf(MSG_DEBUG, "Allow reassociation - selected BSS has "
                           "preferred BSSID");
                return 1;
        }

        min_diff = 2;
        if (current_bss->level < 0) {
                if (current_bss->level < -85)
                        min_diff = 1;
                else if (current_bss->level < -80)
                        min_diff = 2;
                else if (current_bss->level < -75)
                        min_diff = 3;
                else if (current_bss->level < -70)
                        min_diff = 4;
                else
                        min_diff = 5;
        }
        if (abs(current_bss->level - selected->level) < min_diff) {
                wpa_printf(MSG_DEBUG, "Skip roam - too small difference in "
                           "signal level");
                return 0;
        }

        return 1;
}


static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
                                              union wpa_event_data *data)
{
        struct wpa_bss *selected;
        struct wpa_ssid *ssid = NULL;
        struct wpa_scan_results *scan_res;

        wpa_supplicant_notify_scanning(wpa_s, 0);

        scan_res = wpa_supplicant_get_scan_results(wpa_s,
                                                   data ? &data->scan_info :
                                                   NULL, 1);
        if (scan_res == NULL) {
                if (wpa_s->conf->ap_scan == 2)
                        return;
                wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
                           "scanning again");
                wpa_supplicant_req_new_scan(wpa_s, 1, 0);
                return;
        }

        if (wpa_s->scan_res_handler) {
                wpa_s->scan_res_handler(wpa_s, scan_res);
                wpa_s->scan_res_handler = NULL;
                wpa_scan_results_free(scan_res);
                return;
        }

        /*
         * Don't post the results if this was the initial cached
         * and there were no results.
         */
        if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
            scan_res->num == 0) {
                wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
                        "empty - not posting");
        } else {
                wpa_printf(MSG_DEBUG, "New scan results available");
                wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
                wpas_notify_scan_results(wpa_s);
        }

        wpas_notify_scan_done(wpa_s, 1);

        if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
                wpa_scan_results_free(scan_res);
                return;
        }

        if (wpa_s->disconnected) {
                wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
                wpa_scan_results_free(scan_res);
                return;
        }

        if (bgscan_notify_scan(wpa_s) == 1) {
                wpa_scan_results_free(scan_res);
                return;
        }

        wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);

        selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);

        if (selected) {
                int skip;
                wpa_s->more_bss_to_try = 1;
                skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
                                                    scan_res);
                wpa_scan_results_free(scan_res);
                if (skip)
                        return;
                wpa_supplicant_connect(wpa_s, selected, ssid);
        } else {
                wpa_s->more_bss_to_try = 0;
                wpa_scan_results_free(scan_res);
                wpa_printf(MSG_DEBUG, "No suitable network found");
                ssid = wpa_supplicant_pick_new_network(wpa_s);
                if (ssid) {
                        wpa_printf(MSG_DEBUG, "Setup a new network");
                        wpa_supplicant_associate(wpa_s, NULL, ssid);
                } else {
                        int timeout_sec = 1;
                        int timeout_usec = 0;
                        wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
                                                    timeout_usec);
                }
        }
}
#endif /* CONFIG_NO_SCAN_PROCESSING */


static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
                                          union wpa_event_data *data)
{
        int l, len, found = 0, wpa_found, rsn_found;
        const 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);
        if (data->assoc_info.freq)
                wpa_printf(MSG_DEBUG, "freq=%u MHz", data->assoc_info.freq);

        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] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
                     (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
                    (p[0] == WLAN_EID_RSN && 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);

#ifdef CONFIG_IEEE80211R
#ifdef CONFIG_SME
        if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
                u8 bssid[ETH_ALEN];
                if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
                    wpa_ft_validate_reassoc_resp(wpa_s->wpa,
                                                 data->assoc_info.resp_ies,
                                                 data->assoc_info.resp_ies_len,
                                                 bssid) < 0) {
                        wpa_printf(MSG_DEBUG, "FT: Validation of "
                                   "Reassociation Response failed");
                        wpa_supplicant_deauthenticate(
                                wpa_s, WLAN_REASON_INVALID_IE);
                        return -1;
                }
        }

        p = data->assoc_info.resp_ies;
        l = data->assoc_info.resp_ies_len;

        /* Go through the IEs and make a copy of the MDIE, 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] == WLAN_EID_MOBILITY_DOMAIN &&
                    p[1] >= MOBILITY_DOMAIN_ID_LEN) {
                        wpa_s->sme.ft_used = 1;
                        os_memcpy(wpa_s->sme.mobility_domain, p + 2,
                                  MOBILITY_DOMAIN_ID_LEN);
                        break;
                }
                l -= len;
                p += len;
        }
#endif /* CONFIG_SME */

        wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
                             data->assoc_info.resp_ies_len);
#endif /* CONFIG_IEEE80211R */

        /* 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] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
                    os_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] == WLAN_EID_RSN && 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);
        if (wpa_found || rsn_found)
                wpa_s->ap_ies_from_associnfo = 1;

        wpa_s->assoc_freq = data->assoc_info.freq;

        return 0;
}


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

#ifdef CONFIG_AP
        if (wpa_s->ap_iface) {
                hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
                                    data->assoc_info.addr,
                                    data->assoc_info.req_ies,
                                    data->assoc_info.req_ies_len);
                return;
        }
#endif /* CONFIG_AP */

        ft_completed = wpa_ft_is_completed(wpa_s->wpa);
        if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
                return;

        wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
        if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
                os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
        if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
            (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
             os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
                wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
                        MACSTR, MAC2STR(bssid));
                bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
                os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
                os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
                if (bssid_changed)
                        wpas_notify_bssid_changed(wpa_s);

                if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
                        wpa_clear_keys(wpa_s, bssid);
                }
                if (wpa_supplicant_select_config(wpa_s) < 0) {
                        wpa_supplicant_disassociate(
                                wpa_s, WLAN_REASON_DEAUTH_LEAVING);
                        return;
                }
                if (wpa_s->current_ssid) {
                        struct wpa_bss *bss = NULL;
                        struct wpa_ssid *ssid = wpa_s->current_ssid;
                        if (ssid->ssid_len > 0)
                                bss = wpa_bss_get(wpa_s, bssid,
                                                  ssid->ssid, ssid->ssid_len);
                        if (!bss)
                                bss = wpa_bss_get_bssid(wpa_s, bssid);
                        if (bss)
                                wpa_s->current_bss = bss;
                }
        }

#ifdef CONFIG_SME
        os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
        wpa_s->sme.prev_bssid_set = 1;
#endif /* CONFIG_SME */

        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.
         */
        if (!ft_completed) {
                eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
                eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
        }
        if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
                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_s->current_ssid &&
             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
                wpa_supplicant_cancel_auth_timeout(wpa_s);
                wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
        } else if (!ft_completed) {
                /* Timeout for receiving the first EAPOL packet */
                wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
        }
        wpa_supplicant_cancel_scan(wpa_s);

        if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
            wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
                /*
                 * We are done; the driver will take care of RSN 4-way
                 * handshake.
                 */
                wpa_supplicant_cancel_auth_timeout(wpa_s);
                wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
                eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
                eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
        }

        if (wpa_s->pending_eapol_rx) {
                struct os_time now, age;
                os_get_time(&now);
                os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
                if (age.sec == 0 && age.usec < 100000 &&
                    os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
                    0) {
                        wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
                                   "that was received just before association "
                                   "notification");
                        wpa_supplicant_rx_eapol(
                                wpa_s, wpa_s->pending_eapol_rx_src,
                                wpabuf_head(wpa_s->pending_eapol_rx),
                                wpabuf_len(wpa_s->pending_eapol_rx));
                }
                wpabuf_free(wpa_s->pending_eapol_rx);
                wpa_s->pending_eapol_rx = NULL;
        }

#ifdef CONFIG_BGSCAN
        if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
                bgscan_deinit(wpa_s);
                if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
                        if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
                                wpa_printf(MSG_DEBUG, "Failed to initialize "
                                           "bgscan");
                                /*
                                 * Live without bgscan; it is only used as a
                                 * roaming optimization, so the initial
                                 * connection is not affected.
                                 */
                        } else
                                wpa_s->bgscan_ssid = wpa_s->current_ssid;
                } else
                        wpa_s->bgscan_ssid = NULL;
        }
#endif /* CONFIG_BGSCAN */

        if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
            wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
            capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
                /* Set static WEP keys again */
                wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
        }
}


static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
                                          u16 reason_code)
{
        const u8 *bssid;
#ifdef CONFIG_SME
        int authenticating;
        u8 prev_pending_bssid[ETH_ALEN];

        authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
        os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
#endif /* CONFIG_SME */

        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_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
                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);
        bssid = wpa_s->bssid;
        if (is_zero_ether_addr(bssid))
                bssid = wpa_s->pending_bssid;
        wpa_blacklist_add(wpa_s, bssid);
        wpa_sm_notify_disassoc(wpa_s->wpa);
        wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
                " reason=%d",
                MAC2STR(bssid), reason_code);
        if (wpa_supplicant_dynamic_keys(wpa_s)) {
                wpa_printf(MSG_DEBUG, "Disconnect event - remove keys");
                wpa_s->keys_cleared = 0;
                wpa_clear_keys(wpa_s, wpa_s->bssid);
        }
        wpa_supplicant_mark_disassoc(wpa_s);
        bgscan_deinit(wpa_s);
#ifdef CONFIG_SME
//      if (authenticating &&
//          (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
//              /*
//               * mac80211-workaround to force deauth on failed auth cmd,
//               * requires us to remain in authenticating state to allow the
//               * second authentication attempt to be continued properly.
//               */
//              wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
//                         "proceed after disconnection event");
//              wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
//              os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
//      }
#endif /* CONFIG_SME */
}


#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
                                                    void *sock_ctx)
{
        struct wpa_supplicant *wpa_s = eloop_ctx;

        if (!wpa_s->pending_mic_error_report)
                return;

        wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
        wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
        wpa_s->pending_mic_error_report = 0;
}
#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */


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

        wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
        pairwise = (data && data->michael_mic_failure.unicast);
        os_get_time(&t);
        if ((wpa_s->last_michael_mic_error &&
             t.sec - wpa_s->last_michael_mic_error <= 60) ||
            wpa_s->pending_mic_error_report) {
                if (wpa_s->pending_mic_error_report) {
                        /*
                         * Send the pending MIC error report immediately since
                         * we are going to start countermeasures and AP better
                         * do the same.
                         */
                        wpa_sm_key_request(wpa_s->wpa, 1,
                                           wpa_s->pending_mic_error_pairwise);
                }

                /* Send the new MIC error report immediately since we are going
                 * to start countermeasures and AP better do the same.
                 */
                wpa_sm_key_request(wpa_s->wpa, 1, pairwise);

                /* 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. */
                os_sleep(0, 10000);

                wpa_drv_set_countermeasures(wpa_s, 1);
                wpa_supplicant_deauthenticate(wpa_s,
                                              WLAN_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.. */
        } else {
#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
                if (wpa_s->mic_errors_seen) {
                        /*
                         * Reduce the effectiveness of Michael MIC error
                         * reports as a means for attacking against TKIP if
                         * more than one MIC failure is noticed with the same
                         * PTK. We delay the transmission of the reports by a
                         * random time between 0 and 60 seconds in order to
                         * force the attacker wait 60 seconds before getting
                         * the information on whether a frame resulted in a MIC
                         * failure.
                         */
                        u8 rval[4];
                        int sec;

                        if (os_get_random(rval, sizeof(rval)) < 0)
                                sec = os_random() % 60;
                        else
                                sec = WPA_GET_BE32(rval) % 60;
                        wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
                                   "seconds", sec);
                        wpa_s->pending_mic_error_report = 1;
                        wpa_s->pending_mic_error_pairwise = pairwise;
                        eloop_cancel_timeout(
                                wpa_supplicant_delayed_mic_error_report,
                                wpa_s, NULL);
                        eloop_register_timeout(
                                sec, os_random() % 1000000,
                                wpa_supplicant_delayed_mic_error_report,
                                wpa_s, NULL);
                } else {
                        wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
                }
#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
                wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
        }
        wpa_s->last_michael_mic_error = t.sec;
        wpa_s->mic_errors_seen++;
}


#ifdef CONFIG_TERMINATE_ONLASTIF
static int any_interfaces(struct wpa_supplicant *head)
{
        struct wpa_supplicant *wpa_s;

        for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
                if (!wpa_s->interface_removed)
                        return 1;
        return 0;
}
#endif /* CONFIG_TERMINATE_ONLASTIF */


static void
wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
                                      union wpa_event_data *data)
{
        if (os_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) < 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;
#ifdef CONFIG_TERMINATE_ONLASTIF
                /* check if last interface */
                if (!any_interfaces(wpa_s->global->ifaces))
                        eloop_terminate();
#endif /* CONFIG_TERMINATE_ONLASTIF */
                break;
        }
}


#ifdef CONFIG_PEERKEY
static void
wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
                              union wpa_event_data *data)
{
        if (data == NULL)
                return;
        wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
}
#endif /* CONFIG_PEERKEY */


#ifdef CONFIG_IEEE80211R
static void
wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
                                 union wpa_event_data *data)
{
        if (data == NULL)
                return;

        if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
                                    data->ft_ies.ies_len,
                                    data->ft_ies.ft_action,
                                    data->ft_ies.target_ap,
                                    data->ft_ies.ric_ies,
                                    data->ft_ies.ric_ies_len) < 0) {
                /* TODO: prevent MLME/driver from trying to associate? */
        }
}
#endif /* CONFIG_IEEE80211R */


#ifdef CONFIG_IBSS_RSN
static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
                                                union wpa_event_data *data)
{
        if (data == NULL)
                return;
        ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
}
#endif /* CONFIG_IBSS_RSN */


#ifdef CONFIG_IEEE80211R
static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
                         size_t len)
{
        const u8 *sta_addr, *target_ap_addr;
        u16 status;

        wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
        if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
                return; /* only SME case supported for now */
        if (len < 1 + 2 * ETH_ALEN + 2)
                return;
        if (data[0] != 2)
                return; /* Only FT Action Response is supported for now */
        sta_addr = data + 1;
        target_ap_addr = data + 1 + ETH_ALEN;
        status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
        wpa_printf(MSG_DEBUG, "FT: Received FT Action Response: STA " MACSTR
                   " TargetAP " MACSTR " status %u",
                   MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);

        if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
                wpa_printf(MSG_DEBUG, "FT: Foreign STA Address " MACSTR
                           " in FT Action Response", MAC2STR(sta_addr));
                return;
        }

        if (status) {
                wpa_printf(MSG_DEBUG, "FT: FT Action Response indicates "
                           "failure (status code %d)", status);
                /* TODO: report error to FT code(?) */
                return;
        }

        if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
                                    len - (1 + 2 * ETH_ALEN + 2), 1,
                                    target_ap_addr, NULL, 0) < 0)
                return;

#ifdef CONFIG_SME
        {
                struct wpa_bss *bss;
                bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
                if (bss)
                        wpa_s->sme.freq = bss->freq;
                wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
                sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
                              WLAN_AUTH_FT);
        }
#endif /* CONFIG_SME */
}
#endif /* CONFIG_IEEE80211R */


void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
                          union wpa_event_data *data)
{
        struct wpa_supplicant *wpa_s = ctx;
        u16 reason_code = 0;

        switch (event) {
        case EVENT_AUTH:
                sme_event_auth(wpa_s, data);
                break;
        case EVENT_ASSOC:
                wpa_supplicant_event_assoc(wpa_s, data);
                break;
        case EVENT_DISASSOC:
                wpa_printf(MSG_DEBUG, "Disassociation notification");
#ifdef CONFIG_AP
                if (wpa_s->ap_iface && data) {
                        hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
                                               data->disassoc_info.addr);
                        break;
                }
#endif /* CONFIG_AP */
                if (data)
                        reason_code = data->deauth_info.reason_code;
                if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
                        sme_event_disassoc(wpa_s, data);
                /* fall through */
        case EVENT_DEAUTH:
                if (event == EVENT_DEAUTH) {
                        wpa_printf(MSG_DEBUG, "Deauthentication notification");
                        if (data)
                                reason_code = data->deauth_info.reason_code;
                }
#ifdef CONFIG_AP
                if (wpa_s->ap_iface && data) {
                        hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
                                               data->deauth_info.addr);
                        break;
                }
#endif /* CONFIG_AP */
                wpa_supplicant_event_disassoc(wpa_s, reason_code);
                break;
        case EVENT_MICHAEL_MIC_FAILURE:
                wpa_supplicant_event_michael_mic_failure(wpa_s, data);
                break;
#ifndef CONFIG_NO_SCAN_PROCESSING
        case EVENT_SCAN_RESULTS:
                wpa_supplicant_event_scan_results(wpa_s, data);
                break;
#endif /* CONFIG_NO_SCAN_PROCESSING */
        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;
#ifdef CONFIG_PEERKEY
        case EVENT_STKSTART:
                wpa_supplicant_event_stkstart(wpa_s, data);
                break;
#endif /* CONFIG_PEERKEY */
#ifdef CONFIG_IEEE80211R
        case EVENT_FT_RESPONSE:
                wpa_supplicant_event_ft_response(wpa_s, data);
                break;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IBSS_RSN
        case EVENT_IBSS_RSN_START:
                wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
                break;
#endif /* CONFIG_IBSS_RSN */
        case EVENT_ASSOC_REJECT:
                sme_event_assoc_reject(wpa_s, data);
                break;
        case EVENT_AUTH_TIMED_OUT:
                sme_event_auth_timed_out(wpa_s, data);
                break;
        case EVENT_ASSOC_TIMED_OUT:
                sme_event_assoc_timed_out(wpa_s, data);
                break;
#ifdef CONFIG_AP
        case EVENT_TX_STATUS:
                if (wpa_s->ap_iface == NULL)
                        break;
                switch (data->tx_status.type) {
                case WLAN_FC_TYPE_MGMT:
                        ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
                                      data->tx_status.data_len,
                                      data->tx_status.stype,
                                      data->tx_status.ack);
                        break;
                case WLAN_FC_TYPE_DATA:
                        ap_tx_status(wpa_s, data->tx_status.dst,
                                     data->tx_status.data,
                                     data->tx_status.data_len,
                                     data->tx_status.ack);
                        break;
                }
                break;
        case EVENT_RX_FROM_UNKNOWN:
                if (wpa_s->ap_iface == NULL)
                        break;
                ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.frame,
                                       data->rx_from_unknown.len);
                break;
        case EVENT_RX_MGMT:
                if (wpa_s->ap_iface == NULL)
                        break;
                ap_mgmt_rx(wpa_s, &data->rx_mgmt);
                break;
#endif /* CONFIG_AP */
        case EVENT_RX_ACTION:
                wpa_printf(MSG_DEBUG, "Received Action frame: SA=" MACSTR
                           " Category=%u DataLen=%d freq=%d MHz",
                           MAC2STR(data->rx_action.sa),
                           data->rx_action.category, (int) data->rx_action.len,
                           data->rx_action.freq);
#ifdef CONFIG_IEEE80211R
                if (data->rx_action.category == WLAN_ACTION_FT) {
                        ft_rx_action(wpa_s, data->rx_action.data,
                                     data->rx_action.len);
                        break;
                }
#endif /* CONFIG_IEEE80211R */
                break;
#ifdef CONFIG_CLIENT_MLME
        case EVENT_MLME_RX: {
                struct ieee80211_rx_status rx_status;
                os_memset(&rx_status, 0, sizeof(rx_status));
                rx_status.freq = data->mlme_rx.freq;
                rx_status.channel = data->mlme_rx.channel;
                rx_status.ssi = data->mlme_rx.ssi;
                ieee80211_sta_rx(wpa_s, data->mlme_rx.buf, data->mlme_rx.len,
                                 &rx_status);
                break;
        }
#endif /* CONFIG_CLIENT_MLME */
        case EVENT_EAPOL_RX:
                wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
                                        data->eapol_rx.data,
                                        data->eapol_rx.data_len);
                break;
        case EVENT_SIGNAL_CHANGE:
                bgscan_notify_signal_change(
                        wpa_s, data->signal_change.above_threshold);
                break;
        default:
                wpa_printf(MSG_INFO, "Unknown event %d", event);
                break;
        }
}

---

wpa_supplicant
Author(s): Package maintained by Blaise Gassend
autogenerated on Fri Jan 11 10:04:04 2013