hostapd.c

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/*
 * hostapd / Initialization and configuration
 * Copyright (c) 2002-2009, 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 "utils/includes.h"

#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "radius/radius_client.h"
#include "drivers/driver.h"
#include "hostapd.h"
#include "authsrv.h"
#include "sta_info.h"
#include "accounting.h"
#include "ap_list.h"
#include "beacon.h"
#include "iapp.h"
#include "ieee802_1x.h"
#include "ieee802_11_auth.h"
#include "vlan_init.h"
#include "wpa_auth.h"
#include "wps_hostapd.h"
#include "hw_features.h"
#include "wpa_auth_glue.h"
#include "ap_drv_ops.h"
#include "ap_config.h"


static int hostapd_flush_old_stations(struct hostapd_data *hapd);
static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);

extern int wpa_debug_level;


int hostapd_reload_config(struct hostapd_iface *iface)
{
        struct hostapd_data *hapd = iface->bss[0];
        struct hostapd_config *newconf, *oldconf;
        size_t j;

        if (iface->config_read_cb == NULL)
                return -1;
        newconf = iface->config_read_cb(iface->config_fname);
        if (newconf == NULL)
                return -1;

        /*
         * Deauthenticate all stations since the new configuration may not
         * allow them to use the BSS anymore.
         */
        for (j = 0; j < iface->num_bss; j++)
                hostapd_flush_old_stations(iface->bss[j]);

#ifndef CONFIG_NO_RADIUS
        /* TODO: update dynamic data based on changed configuration
         * items (e.g., open/close sockets, etc.) */
        radius_client_flush(hapd->radius, 0);
#endif /* CONFIG_NO_RADIUS */

        oldconf = hapd->iconf;
        hapd->iconf = newconf;
        hapd->conf = &newconf->bss[0];
        iface->conf = newconf;

        if (hostapd_setup_wpa_psk(hapd->conf)) {
                wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
                           "after reloading configuration");
        }

        if (hapd->conf->wpa && hapd->wpa_auth == NULL)
                hostapd_setup_wpa(hapd);
        else if (hapd->conf->wpa) {
                const u8 *wpa_ie;
                size_t wpa_ie_len;
                hostapd_reconfig_wpa(hapd);
                wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
                if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
                        wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
                                   "the kernel driver.");
        } else if (hapd->wpa_auth) {
                wpa_deinit(hapd->wpa_auth);
                hapd->wpa_auth = NULL;
                hostapd_set_privacy(hapd, 0);
                hostapd_setup_encryption(hapd->conf->iface, hapd);
                hostapd_set_generic_elem(hapd, (u8 *) "", 0);
        }

        ieee802_11_set_beacon(hapd);

        if (hapd->conf->ssid.ssid_set &&
            hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
                             hapd->conf->ssid.ssid_len)) {
                wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
                /* try to continue */
        }

        if (hapd->conf->ieee802_1x || hapd->conf->wpa)
                hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
        else
                hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);

        hostapd_config_free(oldconf);

        wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);

        return 0;
}


static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
                                              char *ifname)
{
        int i;

        for (i = 0; i < NUM_WEP_KEYS; i++) {
                if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
                                      i == 0 ? 1 : 0, NULL, 0, NULL, 0)) {
                        wpa_printf(MSG_DEBUG, "Failed to clear default "
                                   "encryption keys (ifname=%s keyidx=%d)",
                                   ifname, i);
                }
        }
#ifdef CONFIG_IEEE80211W
        if (hapd->conf->ieee80211w) {
                for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
                        if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL,
                                              i, i == 0 ? 1 : 0, NULL, 0,
                                              NULL, 0)) {
                                wpa_printf(MSG_DEBUG, "Failed to clear "
                                           "default mgmt encryption keys "
                                           "(ifname=%s keyidx=%d)", ifname, i);
                        }
                }
        }
#endif /* CONFIG_IEEE80211W */
}


static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
{
        hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
        return 0;
}


static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
{
        int errors = 0, idx;
        struct hostapd_ssid *ssid = &hapd->conf->ssid;

        idx = ssid->wep.idx;
        if (ssid->wep.default_len &&
            hapd->drv.set_key(hapd->conf->iface,
                              hapd, WPA_ALG_WEP, NULL, idx,
                              idx == ssid->wep.idx,
                              NULL, 0, ssid->wep.key[idx],
                              ssid->wep.len[idx])) {
                wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
                errors++;
        }

        if (ssid->dyn_vlan_keys) {
                size_t i;
                for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
                        const char *ifname;
                        struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
                        if (key == NULL)
                                continue;
                        ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
                                                            i);
                        if (ifname == NULL)
                                continue;

                        idx = key->idx;
                        if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL,
                                              idx, idx == key->idx, NULL, 0,
                                              key->key[idx], key->len[idx])) {
                                wpa_printf(MSG_WARNING, "Could not set "
                                           "dynamic VLAN WEP encryption.");
                                errors++;
                        }
                }
        }

        return errors;
}

static void hostapd_cleanup(struct hostapd_data *hapd)
{
        if (hapd->iface->ctrl_iface_deinit)
                hapd->iface->ctrl_iface_deinit(hapd);

        iapp_deinit(hapd->iapp);
        hapd->iapp = NULL;
        accounting_deinit(hapd);
        hostapd_deinit_wpa(hapd);
        vlan_deinit(hapd);
        hostapd_acl_deinit(hapd);
#ifndef CONFIG_NO_RADIUS
        radius_client_deinit(hapd->radius);
        hapd->radius = NULL;
#endif /* CONFIG_NO_RADIUS */

        hostapd_deinit_wps(hapd);

        authsrv_deinit(hapd);

        if (hapd->interface_added &&
            hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
                wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
                           hapd->conf->iface);
        }

        os_free(hapd->probereq_cb);
        hapd->probereq_cb = NULL;
}


static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
{
}


static void hostapd_cleanup_iface(struct hostapd_iface *iface)
{
        hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
        iface->hw_features = NULL;
        os_free(iface->current_rates);
        iface->current_rates = NULL;
        ap_list_deinit(iface);
        hostapd_config_free(iface->conf);
        iface->conf = NULL;

        os_free(iface->config_fname);
        os_free(iface->bss);
        os_free(iface);
}


static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
{
        int i;

        hostapd_broadcast_wep_set(hapd);

        if (hapd->conf->ssid.wep.default_len) {
                hostapd_set_privacy(hapd, 1);
                return 0;
        }

        for (i = 0; i < 4; i++) {
                if (hapd->conf->ssid.wep.key[i] &&
                    hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
                                      i == hapd->conf->ssid.wep.idx, NULL, 0,
                                      hapd->conf->ssid.wep.key[i],
                                      hapd->conf->ssid.wep.len[i])) {
                        wpa_printf(MSG_WARNING, "Could not set WEP "
                                   "encryption.");
                        return -1;
                }
                if (hapd->conf->ssid.wep.key[i] &&
                    i == hapd->conf->ssid.wep.idx)
                        hostapd_set_privacy(hapd, 1);
        }

        return 0;
}


static int hostapd_flush_old_stations(struct hostapd_data *hapd)
{
        int ret = 0;

        if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
                return 0;

        wpa_printf(MSG_DEBUG, "Flushing old station entries");
        if (hostapd_flush(hapd)) {
                wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
                ret = -1;
        }
        wpa_printf(MSG_DEBUG, "Deauthenticate all stations");

        /* New Prism2.5/3 STA firmware versions seem to have issues with this
         * broadcast deauth frame. This gets the firmware in odd state where
         * nothing works correctly, so let's skip sending this for the hostap
         * driver. */
        if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
                u8 addr[ETH_ALEN];
                os_memset(addr, 0xff, ETH_ALEN);
                hapd->drv.sta_deauth(hapd, addr,
                                     WLAN_REASON_PREV_AUTH_NOT_VALID);
        }

        return ret;
}


static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
{
        u8 mask[ETH_ALEN] = { 0 };
        struct hostapd_data *hapd = iface->bss[0];
        unsigned int i = iface->conf->num_bss, bits = 0, j;
        int res;
        int auto_addr = 0;

        if (hostapd_drv_none(hapd))
                return 0;

        /* Generate BSSID mask that is large enough to cover the BSSIDs. */

        /* Determine the bits necessary to cover the number of BSSIDs. */
        for (i--; i; i >>= 1)
                bits++;

        /* Determine the bits necessary to any configured BSSIDs,
           if they are higher than the number of BSSIDs. */
        for (j = 0; j < iface->conf->num_bss; j++) {
                if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
                        if (j)
                                auto_addr++;
                        continue;
                }

                for (i = 0; i < ETH_ALEN; i++) {
                        mask[i] |=
                                iface->conf->bss[j].bssid[i] ^
                                hapd->own_addr[i];
                }
        }

        if (!auto_addr)
                goto skip_mask_ext;

        for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
                ;
        j = 0;
        if (i < ETH_ALEN) {
                j = (5 - i) * 8;

                while (mask[i] != 0) {
                        mask[i] >>= 1;
                        j++;
                }
        }

        if (bits < j)
                bits = j;

        if (bits > 40) {
                wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
                           bits);
                return -1;
        }

        os_memset(mask, 0xff, ETH_ALEN);
        j = bits / 8;
        for (i = 5; i > 5 - j; i--)
                mask[i] = 0;
        j = bits % 8;
        while (j--)
                mask[i] <<= 1;

skip_mask_ext:
        wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
                   (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);

        res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
        if (res == 0)
                return 0;

        if (res < 0) {
                wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
                           MACSTR " for start address " MACSTR ".",
                           MAC2STR(mask), MAC2STR(hapd->own_addr));
                return -1;
        }

        if (!auto_addr)
                return 0;

        for (i = 0; i < ETH_ALEN; i++) {
                if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
                        wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
                                   " for start address " MACSTR ".",
                                   MAC2STR(mask), MAC2STR(hapd->own_addr));
                        wpa_printf(MSG_ERROR, "Start address must be the "
                                   "first address in the block (i.e., addr "
                                   "AND mask == addr).");
                        return -1;
                }
        }

        return 0;
}


static int mac_in_conf(struct hostapd_config *conf, const void *a)
{
        size_t i;

        for (i = 0; i < conf->num_bss; i++) {
                if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
                        return 1;
                }
        }

        return 0;
}




static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
{
        struct hostapd_bss_config *conf = hapd->conf;
        u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
        int ssid_len, set_ssid;
        char force_ifname[IFNAMSIZ];
        u8 if_addr[ETH_ALEN];

        if (!first) {
                if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
                        /* Allocate the next available BSSID. */
                        do {
                                inc_byte_array(hapd->own_addr, ETH_ALEN);
                        } while (mac_in_conf(hapd->iconf, hapd->own_addr));
                } else {
                        /* Allocate the configured BSSID. */
                        os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);

                        if (hostapd_mac_comp(hapd->own_addr,
                                             hapd->iface->bss[0]->own_addr) ==
                            0) {
                                wpa_printf(MSG_ERROR, "BSS '%s' may not have "
                                           "BSSID set to the MAC address of "
                                           "the radio", hapd->conf->iface);
                                return -1;
                        }
                }

                hapd->interface_added = 1;
                if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
                                   hapd->conf->iface, hapd->own_addr, hapd,
                                   &hapd->drv_priv, force_ifname, if_addr)) {
                        wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
                                   MACSTR ")", MAC2STR(hapd->own_addr));
                        return -1;
                }
        }

        hostapd_flush_old_stations(hapd);
        hostapd_set_privacy(hapd, 0);

        hostapd_broadcast_wep_clear(hapd);
        if (hostapd_setup_encryption(hapd->conf->iface, hapd))
                return -1;

        /*
         * Fetch the SSID from the system and use it or,
         * if one was specified in the config file, verify they
         * match.
         */
        ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
        if (ssid_len < 0) {
                wpa_printf(MSG_ERROR, "Could not read SSID from system");
                return -1;
        }
        if (conf->ssid.ssid_set) {
                /*
                 * If SSID is specified in the config file and it differs
                 * from what is being used then force installation of the
                 * new SSID.
                 */
                set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
                            os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
        } else {
                /*
                 * No SSID in the config file; just use the one we got
                 * from the system.
                 */
                set_ssid = 0;
                conf->ssid.ssid_len = ssid_len;
                os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
                conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
        }

        if (!hostapd_drv_none(hapd)) {
                wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
                           " and ssid '%s'",
                           hapd->conf->iface, MAC2STR(hapd->own_addr),
                           hapd->conf->ssid.ssid);
        }

        if (hostapd_setup_wpa_psk(conf)) {
                wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
                return -1;
        }

        /* Set SSID for the kernel driver (to be used in beacon and probe
         * response frames) */
        if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
                                         conf->ssid.ssid_len)) {
                wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
                return -1;
        }

        if (wpa_debug_level == MSG_MSGDUMP)
                conf->radius->msg_dumps = 1;
#ifndef CONFIG_NO_RADIUS
        hapd->radius = radius_client_init(hapd, conf->radius);
        if (hapd->radius == NULL) {
                wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
                return -1;
        }
#endif /* CONFIG_NO_RADIUS */

        if (hostapd_acl_init(hapd)) {
                wpa_printf(MSG_ERROR, "ACL initialization failed.");
                return -1;
        }
        if (hostapd_init_wps(hapd, conf))
                return -1;

        if (authsrv_init(hapd) < 0)
                return -1;

        if (ieee802_1x_init(hapd)) {
                wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
                return -1;
        }

        if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
                return -1;

        if (accounting_init(hapd)) {
                wpa_printf(MSG_ERROR, "Accounting initialization failed.");
                return -1;
        }

        if (hapd->conf->ieee802_11f &&
            (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
                wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
                           "failed.");
                return -1;
        }

        if (hapd->iface->ctrl_iface_init &&
            hapd->iface->ctrl_iface_init(hapd)) {
                wpa_printf(MSG_ERROR, "Failed to setup control interface");
                return -1;
        }

        if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
                wpa_printf(MSG_ERROR, "VLAN initialization failed.");
                return -1;
        }

        ieee802_11_set_beacon(hapd);

        return 0;
}


static void hostapd_tx_queue_params(struct hostapd_iface *iface)
{
        struct hostapd_data *hapd = iface->bss[0];
        int i;
        struct hostapd_tx_queue_params *p;

        for (i = 0; i < NUM_TX_QUEUES; i++) {
                p = &iface->conf->tx_queue[i];

                if (!p->configured)
                        continue;

                if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
                                                p->cwmax, p->burst)) {
                        wpa_printf(MSG_DEBUG, "Failed to set TX queue "
                                   "parameters for queue %d.", i);
                        /* Continue anyway */
                }
        }
}


static int setup_interface(struct hostapd_iface *iface)
{
        struct hostapd_data *hapd = iface->bss[0];
        size_t i;
        char country[4];

        /*
         * Make sure that all BSSes get configured with a pointer to the same
         * driver interface.
         */
        for (i = 1; i < iface->num_bss; i++) {
                iface->bss[i]->driver = hapd->driver;
                iface->bss[i]->drv_priv = hapd->drv_priv;
        }

        if (hostapd_validate_bssid_configuration(iface))
                return -1;

        if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
                os_memcpy(country, hapd->iconf->country, 3);
                country[3] = '\0';
                if (hostapd_set_country(hapd, country) < 0) {
                        wpa_printf(MSG_ERROR, "Failed to set country code");
                        return -1;
                }
        }

        if (hostapd_get_hw_features(iface)) {
                /* Not all drivers support this yet, so continue without hw
                 * feature data. */
        } else {
                int ret = hostapd_select_hw_mode(iface);
                if (ret < 0) {
                        wpa_printf(MSG_ERROR, "Could not select hw_mode and "
                                   "channel. (%d)", ret);
                        return -1;
                }
                ret = hostapd_check_ht_capab(iface);
                if (ret < 0)
                        return -1;
                if (ret == 1) {
                        wpa_printf(MSG_DEBUG, "Interface initialization will "
                                   "be completed in a callback");
                        return 0;
                }
        }
        return hostapd_setup_interface_complete(iface, 0);
}


int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
{
        struct hostapd_data *hapd = iface->bss[0];
        size_t j;
        u8 *prev_addr;

        if (err) {
                wpa_printf(MSG_ERROR, "Interface initialization failed");
                eloop_terminate();
                return -1;
        }

        wpa_printf(MSG_DEBUG, "Completing interface initialization");
        if (hapd->iconf->channel) {
                iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
                wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
                           "Frequency: %d MHz",
                           hostapd_hw_mode_txt(hapd->iconf->hw_mode),
                           hapd->iconf->channel, iface->freq);

                if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
                                     hapd->iconf->channel,
                                     hapd->iconf->ieee80211n,
                                     hapd->iconf->secondary_channel)) {
                        wpa_printf(MSG_ERROR, "Could not set channel for "
                                   "kernel driver");
                        return -1;
                }
        }

        if (hapd->iconf->rts_threshold > -1 &&
            hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
                wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
                           "kernel driver");
                return -1;
        }

        if (hapd->iconf->fragm_threshold > -1 &&
            hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
                wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
                           "for kernel driver");
                return -1;
        }

        prev_addr = hapd->own_addr;

        for (j = 0; j < iface->num_bss; j++) {
                hapd = iface->bss[j];
                if (j)
                        os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
                if (hostapd_setup_bss(hapd, j == 0))
                        return -1;
                if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
                        prev_addr = hapd->own_addr;
        }

        hostapd_tx_queue_params(iface);

        ap_list_init(iface);

        if (hostapd_driver_commit(hapd) < 0) {
                wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
                           "configuration", __func__);
                return -1;
        }

        wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
                   iface->bss[0]->conf->iface);

        return 0;
}


int hostapd_setup_interface(struct hostapd_iface *iface)
{
        int ret;

        ret = setup_interface(iface);
        if (ret) {
                wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
                           iface->bss[0]->conf->iface);
                return -1;
        }

        return 0;
}


struct hostapd_data *
hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
                       struct hostapd_config *conf,
                       struct hostapd_bss_config *bss)
{
        struct hostapd_data *hapd;

        hapd = os_zalloc(sizeof(*hapd));
        if (hapd == NULL)
                return NULL;

        hostapd_set_driver_ops(&hapd->drv);
        hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
        hapd->iconf = conf;
        hapd->conf = bss;
        hapd->iface = hapd_iface;
        hapd->driver = hapd->iconf->driver;

        return hapd;
}


void hostapd_interface_deinit(struct hostapd_iface *iface)
{
        size_t j;

        if (iface == NULL)
                return;

        hostapd_cleanup_iface_pre(iface);
        for (j = 0; j < iface->num_bss; j++) {
                struct hostapd_data *hapd = iface->bss[j];
                hostapd_free_stas(hapd);
                hostapd_flush_old_stations(hapd);
                hostapd_cleanup(hapd);
        }
}


void hostapd_interface_free(struct hostapd_iface *iface)
{
        size_t j;
        for (j = 0; j < iface->num_bss; j++)
                os_free(iface->bss[j]);
        hostapd_cleanup_iface(iface);
}


void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
                           int reassoc)
{
        if (hapd->tkip_countermeasures) {
                hapd->drv.sta_deauth(hapd, sta->addr,
                                     WLAN_REASON_MICHAEL_MIC_FAILURE);
                return;
        }

        hostapd_prune_associations(hapd, sta->addr);

        /* IEEE 802.11F (IAPP) */
        if (hapd->conf->ieee802_11f)
                iapp_new_station(hapd->iapp, sta);

        /* Start accounting here, if IEEE 802.1X and WPA are not used.
         * IEEE 802.1X/WPA code will start accounting after the station has
         * been authorized. */
        if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
                accounting_sta_start(hapd, sta);

        /* Start IEEE 802.1X authentication process for new stations */
        ieee802_1x_new_station(hapd, sta);
        if (reassoc) {
                if (sta->auth_alg != WLAN_AUTH_FT &&
                    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
                        wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
        } else
                wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
}