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* hostapd / Initialization and configuration
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* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* Alternatively, this software may be distributed under the terms of BSD
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* See README and COPYING for more details.
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "common/ieee802_11_defs.h"
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#include "radius/radius_client.h"
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#include "drivers/driver.h"
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#include "accounting.h"
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#include "ieee802_1x.h"
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#include "ieee802_11_auth.h"
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#include "vlan_init.h"
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#include "wps_hostapd.h"
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#include "hw_features.h"
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#include "wpa_auth_glue.h"
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#include "ap_drv_ops.h"
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#include "ap_config.h"
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static int hostapd_flush_old_stations(struct hostapd_data *hapd);
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static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
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extern int wpa_debug_level;
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int hostapd_reload_config(struct hostapd_iface *iface)
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struct hostapd_data *hapd = iface->bss[0];
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struct hostapd_config *newconf, *oldconf;
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if (iface->config_read_cb == NULL)
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newconf = iface->config_read_cb(iface->config_fname);
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* Deauthenticate all stations since the new configuration may not
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* allow them to use the BSS anymore.
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for (j = 0; j < iface->num_bss; j++)
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hostapd_flush_old_stations(iface->bss[j]);
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#ifndef CONFIG_NO_RADIUS
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/* TODO: update dynamic data based on changed configuration
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* items (e.g., open/close sockets, etc.) */
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radius_client_flush(hapd->radius, 0);
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#endif /* CONFIG_NO_RADIUS */
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oldconf = hapd->iconf;
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hapd->iconf = newconf;
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hapd->conf = &newconf->bss[0];
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iface->conf = newconf;
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if (hostapd_setup_wpa_psk(hapd->conf)) {
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wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
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"after reloading configuration");
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if (hapd->conf->ieee802_1x || hapd->conf->wpa)
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hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
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hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
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if (hapd->conf->wpa && hapd->wpa_auth == NULL)
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hostapd_setup_wpa(hapd);
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else if (hapd->conf->wpa) {
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hostapd_reconfig_wpa(hapd);
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wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
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if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
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wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
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"the kernel driver.");
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} else if (hapd->wpa_auth) {
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wpa_deinit(hapd->wpa_auth);
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hapd->wpa_auth = NULL;
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hostapd_set_privacy(hapd, 0);
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hostapd_setup_encryption(hapd->conf->iface, hapd);
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hostapd_set_generic_elem(hapd, (u8 *) "", 0);
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ieee802_11_set_beacon(hapd);
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hostapd_update_wps(hapd);
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if (hapd->conf->ssid.ssid_set &&
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hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
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hapd->conf->ssid.ssid_len)) {
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wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
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/* try to continue */
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hostapd_config_free(oldconf);
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wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
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static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
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for (i = 0; i < NUM_WEP_KEYS; i++) {
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if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
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i == 0 ? 1 : 0, NULL, 0, NULL, 0)) {
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wpa_printf(MSG_DEBUG, "Failed to clear default "
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"encryption keys (ifname=%s keyidx=%d)",
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#ifdef CONFIG_IEEE80211W
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if (hapd->conf->ieee80211w) {
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for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
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if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL,
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i, i == 0 ? 1 : 0, NULL, 0,
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wpa_printf(MSG_DEBUG, "Failed to clear "
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"default mgmt encryption keys "
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"(ifname=%s keyidx=%d)", ifname, i);
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#endif /* CONFIG_IEEE80211W */
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static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
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hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
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static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
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struct hostapd_ssid *ssid = &hapd->conf->ssid;
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if (ssid->wep.default_len &&
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hapd->drv.set_key(hapd->conf->iface,
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hapd, WPA_ALG_WEP, NULL, idx,
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idx == ssid->wep.idx,
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NULL, 0, ssid->wep.key[idx],
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ssid->wep.len[idx])) {
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wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
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if (ssid->dyn_vlan_keys) {
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for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
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struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
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ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
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if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL,
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idx, idx == key->idx, NULL, 0,
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key->key[idx], key->len[idx])) {
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wpa_printf(MSG_WARNING, "Could not set "
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"dynamic VLAN WEP encryption.");
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* hostapd_cleanup - Per-BSS cleanup (deinitialization)
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* @hapd: Pointer to BSS data
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* This function is used to free all per-BSS data structures and resources.
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* This gets called in a loop for each BSS between calls to
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* hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
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* is deinitialized. Most of the modules that are initialized in
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* hostapd_setup_bss() are deinitialized here.
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static void hostapd_cleanup(struct hostapd_data *hapd)
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if (hapd->iface->ctrl_iface_deinit)
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hapd->iface->ctrl_iface_deinit(hapd);
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iapp_deinit(hapd->iapp);
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accounting_deinit(hapd);
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hostapd_deinit_wpa(hapd);
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hostapd_acl_deinit(hapd);
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#ifndef CONFIG_NO_RADIUS
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radius_client_deinit(hapd->radius);
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#endif /* CONFIG_NO_RADIUS */
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hostapd_deinit_wps(hapd);
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authsrv_deinit(hapd);
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if (hapd->interface_added &&
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hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
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wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
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os_free(hapd->probereq_cb);
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hapd->probereq_cb = NULL;
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* hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
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* @iface: Pointer to interface data
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* This function is called before per-BSS data structures are deinitialized
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* with hostapd_cleanup().
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static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
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* hostapd_cleanup_iface - Complete per-interface cleanup
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* @iface: Pointer to interface data
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* This function is called after per-BSS data structures are deinitialized
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* with hostapd_cleanup().
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static void hostapd_cleanup_iface(struct hostapd_iface *iface)
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hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
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iface->hw_features = NULL;
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os_free(iface->current_rates);
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iface->current_rates = NULL;
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ap_list_deinit(iface);
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hostapd_config_free(iface->conf);
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os_free(iface->config_fname);
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static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
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hostapd_broadcast_wep_set(hapd);
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if (hapd->conf->ssid.wep.default_len) {
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hostapd_set_privacy(hapd, 1);
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for (i = 0; i < 4; i++) {
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if (hapd->conf->ssid.wep.key[i] &&
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hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
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i == hapd->conf->ssid.wep.idx, NULL, 0,
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hapd->conf->ssid.wep.key[i],
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hapd->conf->ssid.wep.len[i])) {
293
wpa_printf(MSG_WARNING, "Could not set WEP "
297
if (hapd->conf->ssid.wep.key[i] &&
298
i == hapd->conf->ssid.wep.idx)
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hostapd_set_privacy(hapd, 1);
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static int hostapd_flush_old_stations(struct hostapd_data *hapd)
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if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
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wpa_printf(MSG_DEBUG, "Flushing old station entries");
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if (hostapd_flush(hapd)) {
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wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
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wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
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/* New Prism2.5/3 STA firmware versions seem to have issues with this
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* broadcast deauth frame. This gets the firmware in odd state where
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* nothing works correctly, so let's skip sending this for the hostap
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if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
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os_memset(addr, 0xff, ETH_ALEN);
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hapd->drv.sta_deauth(hapd, addr,
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WLAN_REASON_PREV_AUTH_NOT_VALID);
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* hostapd_validate_bssid_configuration - Validate BSSID configuration
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* @iface: Pointer to interface data
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* Returns: 0 on success, -1 on failure
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* This function is used to validate that the configured BSSIDs are valid.
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static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
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u8 mask[ETH_ALEN] = { 0 };
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struct hostapd_data *hapd = iface->bss[0];
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unsigned int i = iface->conf->num_bss, bits = 0, j;
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if (hostapd_drv_none(hapd))
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/* Generate BSSID mask that is large enough to cover the BSSIDs. */
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/* Determine the bits necessary to cover the number of BSSIDs. */
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for (i--; i; i >>= 1)
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/* Determine the bits necessary to any configured BSSIDs,
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if they are higher than the number of BSSIDs. */
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for (j = 0; j < iface->conf->num_bss; j++) {
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if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
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for (i = 0; i < ETH_ALEN; i++) {
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iface->conf->bss[j].bssid[i] ^
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for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
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while (mask[i] != 0) {
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wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
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os_memset(mask, 0xff, ETH_ALEN);
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for (i = 5; i > 5 - j; i--)
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wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
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(unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
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res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
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wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
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MACSTR " for start address " MACSTR ".",
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MAC2STR(mask), MAC2STR(hapd->own_addr));
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for (i = 0; i < ETH_ALEN; i++) {
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if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
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wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
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" for start address " MACSTR ".",
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MAC2STR(mask), MAC2STR(hapd->own_addr));
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wpa_printf(MSG_ERROR, "Start address must be the "
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"first address in the block (i.e., addr "
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"AND mask == addr).");
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static int mac_in_conf(struct hostapd_config *conf, const void *a)
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for (i = 0; i < conf->num_bss; i++) {
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if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
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* hostapd_setup_bss - Per-BSS setup (initialization)
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* @hapd: Pointer to BSS data
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* @first: Whether this BSS is the first BSS of an interface
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* This function is used to initialize all per-BSS data structures and
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* resources. This gets called in a loop for each BSS when an interface is
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* initialized. Most of the modules that are initialized here will be
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* deinitialized in hostapd_cleanup().
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static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
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struct hostapd_bss_config *conf = hapd->conf;
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u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
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int ssid_len, set_ssid;
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char force_ifname[IFNAMSIZ];
473
u8 if_addr[ETH_ALEN];
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if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
477
/* Allocate the next available BSSID. */
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inc_byte_array(hapd->own_addr, ETH_ALEN);
480
} while (mac_in_conf(hapd->iconf, hapd->own_addr));
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/* Allocate the configured BSSID. */
483
os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
485
if (hostapd_mac_comp(hapd->own_addr,
486
hapd->iface->bss[0]->own_addr) ==
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wpa_printf(MSG_ERROR, "BSS '%s' may not have "
489
"BSSID set to the MAC address of "
490
"the radio", hapd->conf->iface);
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hapd->interface_added = 1;
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if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
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hapd->conf->iface, hapd->own_addr, hapd,
498
&hapd->drv_priv, force_ifname, if_addr)) {
499
wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
500
MACSTR ")", MAC2STR(hapd->own_addr));
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hostapd_flush_old_stations(hapd);
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hostapd_set_privacy(hapd, 0);
508
hostapd_broadcast_wep_clear(hapd);
509
if (hostapd_setup_encryption(hapd->conf->iface, hapd))
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* Fetch the SSID from the system and use it or,
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* if one was specified in the config file, verify they
517
ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
519
wpa_printf(MSG_ERROR, "Could not read SSID from system");
522
if (conf->ssid.ssid_set) {
524
* If SSID is specified in the config file and it differs
525
* from what is being used then force installation of the
528
set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
529
os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
532
* No SSID in the config file; just use the one we got
536
conf->ssid.ssid_len = ssid_len;
537
os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
538
conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
541
if (!hostapd_drv_none(hapd)) {
542
wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
544
hapd->conf->iface, MAC2STR(hapd->own_addr),
545
hapd->conf->ssid.ssid);
548
if (hostapd_setup_wpa_psk(conf)) {
549
wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
553
/* Set SSID for the kernel driver (to be used in beacon and probe
554
* response frames) */
555
if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
556
conf->ssid.ssid_len)) {
557
wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
561
if (wpa_debug_level == MSG_MSGDUMP)
562
conf->radius->msg_dumps = 1;
563
#ifndef CONFIG_NO_RADIUS
564
hapd->radius = radius_client_init(hapd, conf->radius);
565
if (hapd->radius == NULL) {
566
wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
569
#endif /* CONFIG_NO_RADIUS */
571
if (hostapd_acl_init(hapd)) {
572
wpa_printf(MSG_ERROR, "ACL initialization failed.");
575
if (hostapd_init_wps(hapd, conf))
578
if (authsrv_init(hapd) < 0)
581
if (ieee802_1x_init(hapd)) {
582
wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
586
if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
589
if (accounting_init(hapd)) {
590
wpa_printf(MSG_ERROR, "Accounting initialization failed.");
594
if (hapd->conf->ieee802_11f &&
595
(hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
596
wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
601
if (hapd->iface->ctrl_iface_init &&
602
hapd->iface->ctrl_iface_init(hapd)) {
603
wpa_printf(MSG_ERROR, "Failed to setup control interface");
607
if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
608
wpa_printf(MSG_ERROR, "VLAN initialization failed.");
612
ieee802_11_set_beacon(hapd);
618
static void hostapd_tx_queue_params(struct hostapd_iface *iface)
620
struct hostapd_data *hapd = iface->bss[0];
622
struct hostapd_tx_queue_params *p;
624
for (i = 0; i < NUM_TX_QUEUES; i++) {
625
p = &iface->conf->tx_queue[i];
630
if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
631
p->cwmax, p->burst)) {
632
wpa_printf(MSG_DEBUG, "Failed to set TX queue "
633
"parameters for queue %d.", i);
634
/* Continue anyway */
640
static int setup_interface(struct hostapd_iface *iface)
642
struct hostapd_data *hapd = iface->bss[0];
647
* Make sure that all BSSes get configured with a pointer to the same
650
for (i = 1; i < iface->num_bss; i++) {
651
iface->bss[i]->driver = hapd->driver;
652
iface->bss[i]->drv_priv = hapd->drv_priv;
655
if (hostapd_validate_bssid_configuration(iface))
658
if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
659
os_memcpy(country, hapd->iconf->country, 3);
661
if (hostapd_set_country(hapd, country) < 0) {
662
wpa_printf(MSG_ERROR, "Failed to set country code");
667
if (hostapd_get_hw_features(iface)) {
668
/* Not all drivers support this yet, so continue without hw
671
int ret = hostapd_select_hw_mode(iface);
673
wpa_printf(MSG_ERROR, "Could not select hw_mode and "
674
"channel. (%d)", ret);
677
ret = hostapd_check_ht_capab(iface);
681
wpa_printf(MSG_DEBUG, "Interface initialization will "
682
"be completed in a callback");
686
return hostapd_setup_interface_complete(iface, 0);
690
int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
692
struct hostapd_data *hapd = iface->bss[0];
697
wpa_printf(MSG_ERROR, "Interface initialization failed");
702
wpa_printf(MSG_DEBUG, "Completing interface initialization");
703
if (hapd->iconf->channel) {
704
iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
705
wpa_printf(MSG_DEBUG, "Mode: %s Channel: %d "
707
hostapd_hw_mode_txt(hapd->iconf->hw_mode),
708
hapd->iconf->channel, iface->freq);
710
if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
711
hapd->iconf->channel,
712
hapd->iconf->ieee80211n,
713
hapd->iconf->secondary_channel)) {
714
wpa_printf(MSG_ERROR, "Could not set channel for "
720
if (hapd->iconf->rts_threshold > -1 &&
721
hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
722
wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
727
if (hapd->iconf->fragm_threshold > -1 &&
728
hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
729
wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
730
"for kernel driver");
734
prev_addr = hapd->own_addr;
736
for (j = 0; j < iface->num_bss; j++) {
737
hapd = iface->bss[j];
739
os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
740
if (hostapd_setup_bss(hapd, j == 0))
742
if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
743
prev_addr = hapd->own_addr;
746
hostapd_tx_queue_params(iface);
750
if (hostapd_driver_commit(hapd) < 0) {
751
wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
752
"configuration", __func__);
756
wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
757
iface->bss[0]->conf->iface);
764
* hostapd_setup_interface - Setup of an interface
765
* @iface: Pointer to interface data.
766
* Returns: 0 on success, -1 on failure
768
* Initializes the driver interface, validates the configuration,
769
* and sets driver parameters based on the configuration.
770
* Flushes old stations, sets the channel, encryption,
771
* beacons, and WDS links based on the configuration.
773
int hostapd_setup_interface(struct hostapd_iface *iface)
777
ret = setup_interface(iface);
779
wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
780
iface->bss[0]->conf->iface);
789
* hostapd_alloc_bss_data - Allocate and initialize per-BSS data
790
* @hapd_iface: Pointer to interface data
791
* @conf: Pointer to per-interface configuration
792
* @bss: Pointer to per-BSS configuration for this BSS
793
* Returns: Pointer to allocated BSS data
795
* This function is used to allocate per-BSS data structure. This data will be
796
* freed after hostapd_cleanup() is called for it during interface
799
struct hostapd_data *
800
hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
801
struct hostapd_config *conf,
802
struct hostapd_bss_config *bss)
804
struct hostapd_data *hapd;
806
hapd = os_zalloc(sizeof(*hapd));
810
hostapd_set_driver_ops(&hapd->drv);
811
hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
814
hapd->iface = hapd_iface;
815
hapd->driver = hapd->iconf->driver;
821
void hostapd_interface_deinit(struct hostapd_iface *iface)
828
hostapd_cleanup_iface_pre(iface);
829
for (j = 0; j < iface->num_bss; j++) {
830
struct hostapd_data *hapd = iface->bss[j];
831
hostapd_free_stas(hapd);
832
hostapd_flush_old_stations(hapd);
833
hostapd_cleanup(hapd);
838
void hostapd_interface_free(struct hostapd_iface *iface)
841
for (j = 0; j < iface->num_bss; j++)
842
os_free(iface->bss[j]);
843
hostapd_cleanup_iface(iface);
848
* hostapd_new_assoc_sta - Notify that a new station associated with the AP
849
* @hapd: Pointer to BSS data
850
* @sta: Pointer to the associated STA data
851
* @reassoc: 1 to indicate this was a re-association; 0 = first association
853
* This function will be called whenever a station associates with the AP. It
854
* can be called from ieee802_11.c for drivers that export MLME to hostapd and
855
* from drv_callbacks.c based on driver events for drivers that take care of
856
* management frames (IEEE 802.11 authentication and association) internally.
858
void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
861
if (hapd->tkip_countermeasures) {
862
hapd->drv.sta_deauth(hapd, sta->addr,
863
WLAN_REASON_MICHAEL_MIC_FAILURE);
867
hostapd_prune_associations(hapd, sta->addr);
869
/* IEEE 802.11F (IAPP) */
870
if (hapd->conf->ieee802_11f)
871
iapp_new_station(hapd->iapp, sta);
873
/* Start accounting here, if IEEE 802.1X and WPA are not used.
874
* IEEE 802.1X/WPA code will start accounting after the station has
875
* been authorized. */
876
if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
877
accounting_sta_start(hapd, sta);
879
/* Start IEEE 802.1X authentication process for new stations */
880
ieee802_1x_new_station(hapd, sta);
882
if (sta->auth_alg != WLAN_AUTH_FT &&
883
!(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
884
wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
886
wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
added
removed
src/ap/hostapd.c
