hostap/hostapd/main.c

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/*
* hostapd / main()
* Copyright (c) 2002-2011, 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"
#ifndef CONFIG_NATIVE_WINDOWS
#include <syslog.h>
#endif /* CONFIG_NATIVE_WINDOWS */
#include "utils/common.h"
#include "utils/eloop.h"
#include "crypto/random.h"
#include "crypto/tls.h"
#include "common/version.h"
#include "drivers/driver.h"
#include "eap_server/eap.h"
#include "eap_server/tncs.h"
#include "ap/hostapd.h"
#include "ap/ap_config.h"
#include "config_file.h"
#include "eap_register.h"
#include "dump_state.h"
#include "ctrl_iface.h"
extern int wpa_debug_level;
extern int wpa_debug_show_keys;
extern int wpa_debug_timestamp;
struct hapd_interfaces {
size_t count;
struct hostapd_iface **iface;
};
static int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
int (*cb)(struct hostapd_iface *iface,
void *ctx), void *ctx)
{
size_t i;
int ret;
for (i = 0; i < interfaces->count; i++) {
ret = cb(interfaces->iface[i], ctx);
if (ret)
return ret;
}
return 0;
}
#ifndef CONFIG_NO_HOSTAPD_LOGGER
static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
int level, const char *txt, size_t len)
{
struct hostapd_data *hapd = ctx;
char *format, *module_str;
int maxlen;
int conf_syslog_level, conf_stdout_level;
unsigned int conf_syslog, conf_stdout;
maxlen = len + 100;
format = os_malloc(maxlen);
if (!format)
return;
if (hapd && hapd->conf) {
conf_syslog_level = hapd->conf->logger_syslog_level;
conf_stdout_level = hapd->conf->logger_stdout_level;
conf_syslog = hapd->conf->logger_syslog;
conf_stdout = hapd->conf->logger_stdout;
} else {
conf_syslog_level = conf_stdout_level = 0;
conf_syslog = conf_stdout = (unsigned int) -1;
}
switch (module) {
case HOSTAPD_MODULE_IEEE80211:
module_str = "IEEE 802.11";
break;
case HOSTAPD_MODULE_IEEE8021X:
module_str = "IEEE 802.1X";
break;
case HOSTAPD_MODULE_RADIUS:
module_str = "RADIUS";
break;
case HOSTAPD_MODULE_WPA:
module_str = "WPA";
break;
case HOSTAPD_MODULE_DRIVER:
module_str = "DRIVER";
break;
case HOSTAPD_MODULE_IAPP:
module_str = "IAPP";
break;
case HOSTAPD_MODULE_MLME:
module_str = "MLME";
break;
default:
module_str = NULL;
break;
}
if (hapd && hapd->conf && addr)
os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
hapd->conf->iface, MAC2STR(addr),
module_str ? " " : "", module_str, txt);
else if (hapd && hapd->conf)
os_snprintf(format, maxlen, "%s:%s%s %s",
hapd->conf->iface, module_str ? " " : "",
module_str, txt);
else if (addr)
os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
MAC2STR(addr), module_str ? " " : "",
module_str, txt);
else
os_snprintf(format, maxlen, "%s%s%s",
module_str, module_str ? ": " : "", txt);
if ((conf_stdout & module) && level >= conf_stdout_level) {
wpa_debug_print_timestamp();
printf("%s\n", format);
}
#ifndef CONFIG_NATIVE_WINDOWS
if ((conf_syslog & module) && level >= conf_syslog_level) {
int priority;
switch (level) {
case HOSTAPD_LEVEL_DEBUG_VERBOSE:
case HOSTAPD_LEVEL_DEBUG:
priority = LOG_DEBUG;
break;
case HOSTAPD_LEVEL_INFO:
priority = LOG_INFO;
break;
case HOSTAPD_LEVEL_NOTICE:
priority = LOG_NOTICE;
break;
case HOSTAPD_LEVEL_WARNING:
priority = LOG_WARNING;
break;
default:
priority = LOG_INFO;
break;
}
syslog(priority, "%s", format);
}
#endif /* CONFIG_NATIVE_WINDOWS */
os_free(format);
}
#endif /* CONFIG_NO_HOSTAPD_LOGGER */
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/**
* hostapd_init - Allocate and initialize per-interface data
* @config_file: Path to the configuration file
* Returns: Pointer to the allocated interface data or %NULL on failure
*
* This function is used to allocate main data structures for per-interface
* data. The allocated data buffer will be freed by calling
* hostapd_cleanup_iface().
*/
static struct hostapd_iface * hostapd_init(const char *config_file)
{
struct hostapd_iface *hapd_iface = NULL;
struct hostapd_config *conf = NULL;
struct hostapd_data *hapd;
size_t i;
hapd_iface = os_zalloc(sizeof(*hapd_iface));
if (hapd_iface == NULL)
goto fail;
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hapd_iface->reload_config = hostapd_reload_config;
hapd_iface->config_read_cb = hostapd_config_read;
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hapd_iface->config_fname = os_strdup(config_file);
if (hapd_iface->config_fname == NULL)
goto fail;
hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
hapd_iface->for_each_interface = hostapd_for_each_interface;
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conf = hostapd_config_read(hapd_iface->config_fname);
if (conf == NULL)
goto fail;
hapd_iface->conf = conf;
hapd_iface->num_bss = conf->num_bss;
hapd_iface->bss = os_zalloc(conf->num_bss *
sizeof(struct hostapd_data *));
if (hapd_iface->bss == NULL)
goto fail;
for (i = 0; i < conf->num_bss; i++) {
hapd = hapd_iface->bss[i] =
hostapd_alloc_bss_data(hapd_iface, conf,
&conf->bss[i]);
if (hapd == NULL)
goto fail;
hapd->msg_ctx = hapd;
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}
return hapd_iface;
fail:
if (conf)
hostapd_config_free(conf);
if (hapd_iface) {
os_free(hapd_iface->config_fname);
os_free(hapd_iface->bss);
os_free(hapd_iface);
}
return NULL;
}
static int hostapd_driver_init(struct hostapd_iface *iface)
{
struct wpa_init_params params;
size_t i;
struct hostapd_data *hapd = iface->bss[0];
struct hostapd_bss_config *conf = hapd->conf;
u8 *b = conf->bssid;
struct wpa_driver_capa capa;
if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
return -1;
}
/* Initialize the driver interface */
if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
b = NULL;
os_memset(&params, 0, sizeof(params));
params.bssid = b;
params.ifname = hapd->conf->iface;
params.ssid = (const u8 *) hapd->conf->ssid.ssid;
params.ssid_len = hapd->conf->ssid.ssid_len;
params.test_socket = hapd->conf->test_socket;
params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
params.num_bridge = hapd->iface->num_bss;
params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
if (params.bridge == NULL)
return -1;
for (i = 0; i < hapd->iface->num_bss; i++) {
struct hostapd_data *bss = hapd->iface->bss[i];
if (bss->conf->bridge[0])
params.bridge[i] = bss->conf->bridge;
}
params.own_addr = hapd->own_addr;
hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
os_free(params.bridge);
if (hapd->drv_priv == NULL) {
wpa_printf(MSG_ERROR, "%s driver initialization failed.",
hapd->driver->name);
hapd->driver = NULL;
return -1;
}
if (hapd->driver->get_capa &&
hapd->driver->get_capa(hapd->drv_priv, &capa) == 0)
iface->drv_flags = capa.flags;
return 0;
}
static void hostapd_interface_deinit_free(struct hostapd_iface *iface)
{
const struct wpa_driver_ops *driver;
void *drv_priv;
if (iface == NULL)
return;
driver = iface->bss[0]->driver;
drv_priv = iface->bss[0]->drv_priv;
hostapd_interface_deinit(iface);
if (driver && driver->hapd_deinit)
driver->hapd_deinit(drv_priv);
hostapd_interface_free(iface);
}
static struct hostapd_iface *
hostapd_interface_init(struct hapd_interfaces *interfaces,
const char *config_fname, int debug)
{
struct hostapd_iface *iface;
int k;
wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
iface = hostapd_init(config_fname);
if (!iface)
return NULL;
iface->interfaces = interfaces;
for (k = 0; k < debug; k++) {
if (iface->bss[0]->conf->logger_stdout_level > 0)
iface->bss[0]->conf->logger_stdout_level--;
}
if (hostapd_driver_init(iface) ||
hostapd_setup_interface(iface)) {
hostapd_interface_deinit_free(iface);
return NULL;
}
return iface;
}
/**
* handle_term - SIGINT and SIGTERM handler to terminate hostapd process
*/
static void handle_term(int sig, void *signal_ctx)
{
wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
eloop_terminate();
}
#ifndef CONFIG_NATIVE_WINDOWS
static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
{
if (hostapd_reload_config(iface) < 0) {
wpa_printf(MSG_WARNING, "Failed to read new configuration "
"file - continuing with old.");
}
return 0;
}
/**
* handle_reload - SIGHUP handler to reload configuration
*/
static void handle_reload(int sig, void *signal_ctx)
{
struct hapd_interfaces *interfaces = signal_ctx;
wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
sig);
hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
}
static void handle_dump_state(int sig, void *signal_ctx)
{
#ifdef HOSTAPD_DUMP_STATE
struct hapd_interfaces *interfaces = signal_ctx;
hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
#endif /* HOSTAPD_DUMP_STATE */
}
#endif /* CONFIG_NATIVE_WINDOWS */
static int hostapd_global_init(struct hapd_interfaces *interfaces)
{
hostapd_logger_register_cb(hostapd_logger_cb);
if (eap_server_register_methods()) {
wpa_printf(MSG_ERROR, "Failed to register EAP methods");
return -1;
}
if (eloop_init()) {
wpa_printf(MSG_ERROR, "Failed to initialize event loop");
return -1;
}
random_init();
#ifndef CONFIG_NATIVE_WINDOWS
eloop_register_signal(SIGHUP, handle_reload, interfaces);
eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
#endif /* CONFIG_NATIVE_WINDOWS */
eloop_register_signal_terminate(handle_term, interfaces);
#ifndef CONFIG_NATIVE_WINDOWS
openlog("hostapd", 0, LOG_DAEMON);
#endif /* CONFIG_NATIVE_WINDOWS */
return 0;
}
static void hostapd_global_deinit(const char *pid_file)
{
#ifdef EAP_SERVER_TNC
tncs_global_deinit();
#endif /* EAP_SERVER_TNC */
random_deinit();
eloop_destroy();
#ifndef CONFIG_NATIVE_WINDOWS
closelog();
#endif /* CONFIG_NATIVE_WINDOWS */
eap_server_unregister_methods();
os_daemonize_terminate(pid_file);
}
static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
const char *pid_file)
{
#ifdef EAP_SERVER_TNC
int tnc = 0;
size_t i, k;
for (i = 0; !tnc && i < ifaces->count; i++) {
for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
if (ifaces->iface[i]->bss[0]->conf->tnc) {
tnc++;
break;
}
}
}
if (tnc && tncs_global_init() < 0) {
wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
return -1;
}
#endif /* EAP_SERVER_TNC */
if (daemonize && os_daemonize(pid_file)) {
perror("daemon");
return -1;
}
eloop_run();
return 0;
}
static void show_version(void)
{
fprintf(stderr,
"hostapd v" VERSION_STR "\n"
"User space daemon for IEEE 802.11 AP management,\n"
"IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
"Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> "
"and contributors\n");
}
static void usage(void)
{
show_version();
fprintf(stderr,
"\n"
"usage: hostapd [-hdBKtv] [-P <PID file>] "
"<configuration file(s)>\n"
"\n"
"options:\n"
" -h show this usage\n"
" -d show more debug messages (-dd for even more)\n"
" -B run daemon in the background\n"
" -P PID file\n"
" -K include key data in debug messages\n"
#ifdef CONFIG_DEBUG_FILE
" -f log output to debug file instead of stdout\n"
#endif /* CONFIG_DEBUG_FILE */
" -t include timestamps in some debug messages\n"
" -v show hostapd version\n");
exit(1);
}
static const char * hostapd_msg_ifname_cb(void *ctx)
{
struct hostapd_data *hapd = ctx;
if (hapd && hapd->iconf && hapd->iconf->bss)
return hapd->iconf->bss->iface;
return NULL;
}
int main(int argc, char *argv[])
{
struct hapd_interfaces interfaces;
int ret = 1;
size_t i;
int c, debug = 0, daemonize = 0;
char *pid_file = NULL;
const char *log_file = NULL;
if (os_program_init())
return -1;
for (;;) {
c = getopt(argc, argv, "Bdf:hKP:tv");
if (c < 0)
break;
switch (c) {
case 'h':
usage();
break;
case 'd':
debug++;
if (wpa_debug_level > 0)
wpa_debug_level--;
break;
case 'B':
daemonize++;
break;
case 'f':
log_file = optarg;
break;
case 'K':
wpa_debug_show_keys++;
break;
case 'P':
os_free(pid_file);
pid_file = os_rel2abs_path(optarg);
break;
case 't':
wpa_debug_timestamp++;
break;
case 'v':
show_version();
exit(1);
break;
default:
usage();
break;
}
}
if (optind == argc)
usage();
wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
if (log_file)
wpa_debug_open_file(log_file);
interfaces.count = argc - optind;
interfaces.iface = os_malloc(interfaces.count *
sizeof(struct hostapd_iface *));
if (interfaces.iface == NULL) {
wpa_printf(MSG_ERROR, "malloc failed\n");
return -1;
}
if (hostapd_global_init(&interfaces))
return -1;
/* Initialize interfaces */
for (i = 0; i < interfaces.count; i++) {
interfaces.iface[i] = hostapd_interface_init(&interfaces,
argv[optind + i],
debug);
if (!interfaces.iface[i])
goto out;
}
if (hostapd_global_run(&interfaces, daemonize, pid_file))
goto out;
ret = 0;
out:
/* Deinitialize all interfaces */
for (i = 0; i < interfaces.count; i++)
hostapd_interface_deinit_free(interfaces.iface[i]);
os_free(interfaces.iface);
hostapd_global_deinit(pid_file);
os_free(pid_file);
if (log_file)
wpa_debug_close_file();
os_program_deinit();
return ret;
}