hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #ifndef CONFIG_NATIVE_WINDOWS
  17 #include <syslog.h>
  18 #endif /* CONFIG_NATIVE_WINDOWS */
  19
  20 #include "eloop.h"
  21 #include "hostapd.h"
  22 #include "version.h"
  23 #include "config.h"
  24 #include "tls.h"
  25 #include "eap_server/eap.h"
  26 #include "eap_server/tncs.h"
  27
  28
  29 extern int wpa_debug_level;
  30 extern int wpa_debug_show_keys;
  31 extern int wpa_debug_timestamp;
  32
  33
  34 struct hapd_interfaces {
  35         size_t count;
  36         struct hostapd_iface **iface;
  37 };
  38
  39
  40 int hostapd_for_each_interface(int (*cb)(struct hostapd_iface *iface,
  41                                          void *ctx), void *ctx)
  42 {
  43         struct hapd_interfaces *interfaces = eloop_get_user_data();
  44         size_t i;
  45         int ret;
  46
  47         for (i = 0; i < interfaces->count; i++) {
  48                 ret = cb(interfaces->iface[i], ctx);
  49                 if (ret)
  50                         return ret;
  51         }
  52
  53         return 0;
  54 }
  55
  56
  57 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  58 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  59                               int level, const char *txt, size_t len)
  60 {
  61         struct hostapd_data *hapd = ctx;
  62         char *format, *module_str;
  63         int maxlen;
  64         int conf_syslog_level, conf_stdout_level;
  65         unsigned int conf_syslog, conf_stdout;
  66
  67         maxlen = len + 100;
  68         format = os_malloc(maxlen);
  69         if (!format)
  70                 return;
  71
  72         if (hapd && hapd->conf) {
  73                 conf_syslog_level = hapd->conf->logger_syslog_level;
  74                 conf_stdout_level = hapd->conf->logger_stdout_level;
  75                 conf_syslog = hapd->conf->logger_syslog;
  76                 conf_stdout = hapd->conf->logger_stdout;
  77         } else {
  78                 conf_syslog_level = conf_stdout_level = 0;
  79                 conf_syslog = conf_stdout = (unsigned int) -1;
  80         }
  81
  82         switch (module) {
  83         case HOSTAPD_MODULE_IEEE80211:
  84                 module_str = "IEEE 802.11";
  85                 break;
  86         case HOSTAPD_MODULE_IEEE8021X:
  87                 module_str = "IEEE 802.1X";
  88                 break;
  89         case HOSTAPD_MODULE_RADIUS:
  90                 module_str = "RADIUS";
  91                 break;
  92         case HOSTAPD_MODULE_WPA:
  93                 module_str = "WPA";
  94                 break;
  95         case HOSTAPD_MODULE_DRIVER:
  96                 module_str = "DRIVER";
  97                 break;
  98         case HOSTAPD_MODULE_IAPP:
  99                 module_str = "IAPP";
 100                 break;
 101         case HOSTAPD_MODULE_MLME:
 102                 module_str = "MLME";
 103                 break;
 104         default:
 105                 module_str = NULL;
 106                 break;
 107         }
 108
 109         if (hapd && hapd->conf && addr)
 110                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 111                             hapd->conf->iface, MAC2STR(addr),
 112                             module_str ? " " : "", module_str, txt);
 113         else if (hapd && hapd->conf)
 114                 os_snprintf(format, maxlen, "%s:%s%s %s",
 115                             hapd->conf->iface, module_str ? " " : "",
 116                             module_str, txt);
 117         else if (addr)
 118                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 119                             MAC2STR(addr), module_str ? " " : "",
 120                             module_str, txt);
 121         else
 122                 os_snprintf(format, maxlen, "%s%s%s",
 123                             module_str, module_str ? ": " : "", txt);
 124
 125         if ((conf_stdout & module) && level >= conf_stdout_level) {
 126                 wpa_debug_print_timestamp();
 127                 printf("%s\n", format);
 128         }
 129
 130 #ifndef CONFIG_NATIVE_WINDOWS
 131         if ((conf_syslog & module) && level >= conf_syslog_level) {
 132                 int priority;
 133                 switch (level) {
 134                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 135                 case HOSTAPD_LEVEL_DEBUG:
 136                         priority = LOG_DEBUG;
 137                         break;
 138                 case HOSTAPD_LEVEL_INFO:
 139                         priority = LOG_INFO;
 140                         break;
 141                 case HOSTAPD_LEVEL_NOTICE:
 142                         priority = LOG_NOTICE;
 143                         break;
 144                 case HOSTAPD_LEVEL_WARNING:
 145                         priority = LOG_WARNING;
 146                         break;
 147                 default:
 148                         priority = LOG_INFO;
 149                         break;
 150                 }
 151                 syslog(priority, "%s", format);
 152         }
 153 #endif /* CONFIG_NATIVE_WINDOWS */
 154
 155         os_free(format);
 156 }
 157 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 158
 159
 160 /**
 161  * hostapd_init - Allocate and initialize per-interface data
 162  * @config_file: Path to the configuration file
 163  * Returns: Pointer to the allocated interface data or %NULL on failure
 164  *
 165  * This function is used to allocate main data structures for per-interface
 166  * data. The allocated data buffer will be freed by calling
 167  * hostapd_cleanup_iface().
 168  */
 169 static struct hostapd_iface * hostapd_init(const char *config_file)
 170 {
 171         struct hostapd_iface *hapd_iface = NULL;
 172         struct hostapd_config *conf = NULL;
 173         struct hostapd_data *hapd;
 174         size_t i;
 175
 176         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 177         if (hapd_iface == NULL)
 178                 goto fail;
 179
 180         hapd_iface->config_fname = os_strdup(config_file);
 181         if (hapd_iface->config_fname == NULL)
 182                 goto fail;
 183
 184         conf = hostapd_config_read(hapd_iface->config_fname);
 185         if (conf == NULL)
 186                 goto fail;
 187         hapd_iface->conf = conf;
 188
 189         hapd_iface->num_bss = conf->num_bss;
 190         hapd_iface->bss = os_zalloc(conf->num_bss *
 191                                     sizeof(struct hostapd_data *));
 192         if (hapd_iface->bss == NULL)
 193                 goto fail;
 194
 195         for (i = 0; i < conf->num_bss; i++) {
 196                 hapd = hapd_iface->bss[i] =
 197                         hostapd_alloc_bss_data(hapd_iface, conf,
 198                                                &conf->bss[i]);
 199                 if (hapd == NULL)
 200                         goto fail;
 201         }
 202
 203         return hapd_iface;
 204
 205 fail:
 206         if (conf)
 207                 hostapd_config_free(conf);
 208         if (hapd_iface) {
 209                 for (i = 0; hapd_iface->bss && i < hapd_iface->num_bss; i++) {
 210                         hapd = hapd_iface->bss[i];
 211                         if (hapd && hapd->ssl_ctx)
 212                                 tls_deinit(hapd->ssl_ctx);
 213                 }
 214
 215                 os_free(hapd_iface->config_fname);
 216                 os_free(hapd_iface->bss);
 217                 os_free(hapd_iface);
 218         }
 219         return NULL;
 220 }
 221
 222
 223 static struct hostapd_iface * hostapd_interface_init(const char *config_fname,
 224                                                      int debug)
 225 {
 226         struct hostapd_iface *iface;
 227         int k;
 228
 229         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 230         iface = hostapd_init(config_fname);
 231         if (!iface)
 232                 return NULL;
 233
 234         for (k = 0; k < debug; k++) {
 235                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 236                         iface->bss[0]->conf->logger_stdout_level--;
 237         }
 238
 239         if (hostapd_setup_interface(iface)) {
 240                 hostapd_interface_deinit(iface);
 241                 return NULL;
 242         }
 243
 244         return iface;
 245 }
 246
 247
 248 /**
 249  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 250  */
 251 static void handle_term(int sig, void *eloop_ctx, void *signal_ctx)
 252 {
 253         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 254         eloop_terminate();
 255 }
 256
 257
 258 #ifndef CONFIG_NATIVE_WINDOWS
 259 /**
 260  * handle_reload - SIGHUP handler to reload configuration
 261  */
 262 static void handle_reload(int sig, void *eloop_ctx, void *signal_ctx)
 263 {
 264         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 265                    sig);
 266         hostapd_for_each_interface(handle_reload_iface, NULL);
 267 }
 268
 269
 270 static void handle_dump_state(int sig, void *eloop_ctx, void *signal_ctx)
 271 {
 272 #ifdef HOSTAPD_DUMP_STATE
 273         hostapd_for_each_interface(handle_dump_state_iface, NULL);
 274 #endif /* HOSTAPD_DUMP_STATE */
 275 }
 276 #endif /* CONFIG_NATIVE_WINDOWS */
 277
 278
 279 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 280 {
 281         hostapd_logger_register_cb(hostapd_logger_cb);
 282
 283         if (eap_server_register_methods()) {
 284                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 285                 return -1;
 286         }
 287
 288         if (eloop_init(interfaces)) {
 289                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 290                 return -1;
 291         }
 292
 293 #ifndef CONFIG_NATIVE_WINDOWS
 294         eloop_register_signal(SIGHUP, handle_reload, NULL);
 295         eloop_register_signal(SIGUSR1, handle_dump_state, NULL);
 296 #endif /* CONFIG_NATIVE_WINDOWS */
 297         eloop_register_signal_terminate(handle_term, NULL);
 298
 299 #ifndef CONFIG_NATIVE_WINDOWS
 300         openlog("hostapd", 0, LOG_DAEMON);
 301 #endif /* CONFIG_NATIVE_WINDOWS */
 302
 303         return 0;
 304 }
 305
 306
 307 static void hostapd_global_deinit(const char *pid_file)
 308 {
 309 #ifdef EAP_SERVER_TNC
 310         tncs_global_deinit();
 311 #endif /* EAP_SERVER_TNC */
 312
 313         eloop_destroy();
 314
 315 #ifndef CONFIG_NATIVE_WINDOWS
 316         closelog();
 317 #endif /* CONFIG_NATIVE_WINDOWS */
 318
 319         eap_server_unregister_methods();
 320
 321         os_daemonize_terminate(pid_file);
 322 }
 323
 324
 325 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 326                               const char *pid_file)
 327 {
 328 #ifdef EAP_SERVER_TNC
 329         int tnc = 0;
 330         size_t i, k;
 331
 332         for (i = 0; !tnc && i < ifaces->count; i++) {
 333                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 334                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 335                                 tnc++;
 336                                 break;
 337                         }
 338                 }
 339         }
 340
 341         if (tnc && tncs_global_init() < 0) {
 342                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 343                 return -1;
 344         }
 345 #endif /* EAP_SERVER_TNC */
 346
 347         if (daemonize && os_daemonize(pid_file)) {
 348                 perror("daemon");
 349                 return -1;
 350         }
 351
 352         eloop_run();
 353
 354         return 0;
 355 }
 356
 357
 358 static void show_version(void)
 359 {
 360         fprintf(stderr,
 361                 "hostapd v" VERSION_STR "\n"
 362                 "User space daemon for IEEE 802.11 AP management,\n"
 363                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 364                 "Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> "
 365                 "and contributors\n");
 366 }
 367
 368
 369 static void usage(void)
 370 {
 371         show_version();
 372         fprintf(stderr,
 373                 "\n"
 374                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 375                 "<configuration file(s)>\n"
 376                 "\n"
 377                 "options:\n"
 378                 "   -h   show this usage\n"
 379                 "   -d   show more debug messages (-dd for even more)\n"
 380                 "   -B   run daemon in the background\n"
 381                 "   -P   PID file\n"
 382                 "   -K   include key data in debug messages\n"
 383                 "   -t   include timestamps in some debug messages\n"
 384                 "   -v   show hostapd version\n");
 385
 386         exit(1);
 387 }
 388
 389
 390 int main(int argc, char *argv[])
 391 {
 392         struct hapd_interfaces interfaces;
 393         int ret = 1;
 394         size_t i;
 395         int c, debug = 0, daemonize = 0;
 396         char *pid_file = NULL;
 397
 398         for (;;) {
 399                 c = getopt(argc, argv, "BdhKP:tv");
 400                 if (c < 0)
 401                         break;
 402                 switch (c) {
 403                 case 'h':
 404                         usage();
 405                         break;
 406                 case 'd':
 407                         debug++;
 408                         if (wpa_debug_level > 0)
 409                                 wpa_debug_level--;
 410                         break;
 411                 case 'B':
 412                         daemonize++;
 413                         break;
 414                 case 'K':
 415                         wpa_debug_show_keys++;
 416                         break;
 417                 case 'P':
 418                         os_free(pid_file);
 419                         pid_file = os_rel2abs_path(optarg);
 420                         break;
 421                 case 't':
 422                         wpa_debug_timestamp++;
 423                         break;
 424                 case 'v':
 425                         show_version();
 426                         exit(1);
 427                         break;
 428
 429                 default:
 430                         usage();
 431                         break;
 432                 }
 433         }
 434
 435         if (optind == argc)
 436                 usage();
 437
 438         interfaces.count = argc - optind;
 439         interfaces.iface = os_malloc(interfaces.count *
 440                                      sizeof(struct hostapd_iface *));
 441         if (interfaces.iface == NULL) {
 442                 wpa_printf(MSG_ERROR, "malloc failed\n");
 443                 return -1;
 444         }
 445
 446         if (hostapd_global_init(&interfaces))
 447                 return -1;
 448
 449         /* Initialize interfaces */
 450         for (i = 0; i < interfaces.count; i++) {
 451                 interfaces.iface[i] = hostapd_interface_init(argv[optind + i],
 452                                                              debug);
 453                 if (!interfaces.iface[i])
 454                         goto out;
 455         }
 456
 457         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 458                 goto out;
 459
 460         ret = 0;
 461
 462  out:
 463         /* Deinitialize all interfaces */
 464         for (i = 0; i < interfaces.count; i++)
 465                 hostapd_interface_deinit(interfaces.iface[i]);
 466         os_free(interfaces.iface);
 467
 468         hostapd_global_deinit(pid_file);
 469         os_free(pid_file);
 470
 471         return ret;
 472 }