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 "common.h"
  21 #include "eloop.h"
  22 #include "crypto/tls.h"
  23 #include "common/version.h"
  24 #include "eap_server/eap.h"
  25 #include "eap_server/tncs.h"
  26 #include "hostapd.h"
  27 #include "config.h"
  28 #include "config_file.h"
  29
  30
  31 extern int wpa_debug_level;
  32 extern int wpa_debug_show_keys;
  33 extern int wpa_debug_timestamp;
  34
  35
  36 struct hapd_interfaces {
  37         size_t count;
  38         struct hostapd_iface **iface;
  39 };
  40
  41
  42 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  43                                int (*cb)(struct hostapd_iface *iface,
  44                                          void *ctx), void *ctx)
  45 {
  46         size_t i;
  47         int ret;
  48
  49         for (i = 0; i < interfaces->count; i++) {
  50                 ret = cb(interfaces->iface[i], ctx);
  51                 if (ret)
  52                         return ret;
  53         }
  54
  55         return 0;
  56 }
  57
  58
  59 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  60 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  61                               int level, const char *txt, size_t len)
  62 {
  63         struct hostapd_data *hapd = ctx;
  64         char *format, *module_str;
  65         int maxlen;
  66         int conf_syslog_level, conf_stdout_level;
  67         unsigned int conf_syslog, conf_stdout;
  68
  69         maxlen = len + 100;
  70         format = os_malloc(maxlen);
  71         if (!format)
  72                 return;
  73
  74         if (hapd && hapd->conf) {
  75                 conf_syslog_level = hapd->conf->logger_syslog_level;
  76                 conf_stdout_level = hapd->conf->logger_stdout_level;
  77                 conf_syslog = hapd->conf->logger_syslog;
  78                 conf_stdout = hapd->conf->logger_stdout;
  79         } else {
  80                 conf_syslog_level = conf_stdout_level = 0;
  81                 conf_syslog = conf_stdout = (unsigned int) -1;
  82         }
  83
  84         switch (module) {
  85         case HOSTAPD_MODULE_IEEE80211:
  86                 module_str = "IEEE 802.11";
  87                 break;
  88         case HOSTAPD_MODULE_IEEE8021X:
  89                 module_str = "IEEE 802.1X";
  90                 break;
  91         case HOSTAPD_MODULE_RADIUS:
  92                 module_str = "RADIUS";
  93                 break;
  94         case HOSTAPD_MODULE_WPA:
  95                 module_str = "WPA";
  96                 break;
  97         case HOSTAPD_MODULE_DRIVER:
  98                 module_str = "DRIVER";
  99                 break;
 100         case HOSTAPD_MODULE_IAPP:
 101                 module_str = "IAPP";
 102                 break;
 103         case HOSTAPD_MODULE_MLME:
 104                 module_str = "MLME";
 105                 break;
 106         default:
 107                 module_str = NULL;
 108                 break;
 109         }
 110
 111         if (hapd && hapd->conf && addr)
 112                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 113                             hapd->conf->iface, MAC2STR(addr),
 114                             module_str ? " " : "", module_str, txt);
 115         else if (hapd && hapd->conf)
 116                 os_snprintf(format, maxlen, "%s:%s%s %s",
 117                             hapd->conf->iface, module_str ? " " : "",
 118                             module_str, txt);
 119         else if (addr)
 120                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 121                             MAC2STR(addr), module_str ? " " : "",
 122                             module_str, txt);
 123         else
 124                 os_snprintf(format, maxlen, "%s%s%s",
 125                             module_str, module_str ? ": " : "", txt);
 126
 127         if ((conf_stdout & module) && level >= conf_stdout_level) {
 128                 wpa_debug_print_timestamp();
 129                 printf("%s\n", format);
 130         }
 131
 132 #ifndef CONFIG_NATIVE_WINDOWS
 133         if ((conf_syslog & module) && level >= conf_syslog_level) {
 134                 int priority;
 135                 switch (level) {
 136                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 137                 case HOSTAPD_LEVEL_DEBUG:
 138                         priority = LOG_DEBUG;
 139                         break;
 140                 case HOSTAPD_LEVEL_INFO:
 141                         priority = LOG_INFO;
 142                         break;
 143                 case HOSTAPD_LEVEL_NOTICE:
 144                         priority = LOG_NOTICE;
 145                         break;
 146                 case HOSTAPD_LEVEL_WARNING:
 147                         priority = LOG_WARNING;
 148                         break;
 149                 default:
 150                         priority = LOG_INFO;
 151                         break;
 152                 }
 153                 syslog(priority, "%s", format);
 154         }
 155 #endif /* CONFIG_NATIVE_WINDOWS */
 156
 157         os_free(format);
 158 }
 159 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 160
 161
 162 /**
 163  * hostapd_init - Allocate and initialize per-interface data
 164  * @config_file: Path to the configuration file
 165  * Returns: Pointer to the allocated interface data or %NULL on failure
 166  *
 167  * This function is used to allocate main data structures for per-interface
 168  * data. The allocated data buffer will be freed by calling
 169  * hostapd_cleanup_iface().
 170  */
 171 static struct hostapd_iface * hostapd_init(const char *config_file)
 172 {
 173         struct hostapd_iface *hapd_iface = NULL;
 174         struct hostapd_config *conf = NULL;
 175         struct hostapd_data *hapd;
 176         size_t i;
 177
 178         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 179         if (hapd_iface == NULL)
 180                 goto fail;
 181
 182         hapd_iface->config_read_cb = hostapd_config_read;
 183         hapd_iface->config_fname = os_strdup(config_file);
 184         if (hapd_iface->config_fname == NULL)
 185                 goto fail;
 186
 187         conf = hostapd_config_read(hapd_iface->config_fname);
 188         if (conf == NULL)
 189                 goto fail;
 190         hapd_iface->conf = conf;
 191
 192         hapd_iface->num_bss = conf->num_bss;
 193         hapd_iface->bss = os_zalloc(conf->num_bss *
 194                                     sizeof(struct hostapd_data *));
 195         if (hapd_iface->bss == NULL)
 196                 goto fail;
 197
 198         for (i = 0; i < conf->num_bss; i++) {
 199                 hapd = hapd_iface->bss[i] =
 200                         hostapd_alloc_bss_data(hapd_iface, conf,
 201                                                &conf->bss[i]);
 202                 if (hapd == NULL)
 203                         goto fail;
 204         }
 205
 206         return hapd_iface;
 207
 208 fail:
 209         if (conf)
 210                 hostapd_config_free(conf);
 211         if (hapd_iface) {
 212                 for (i = 0; hapd_iface->bss && i < hapd_iface->num_bss; i++) {
 213                         hapd = hapd_iface->bss[i];
 214                         if (hapd && hapd->ssl_ctx)
 215                                 tls_deinit(hapd->ssl_ctx);
 216                 }
 217
 218                 os_free(hapd_iface->config_fname);
 219                 os_free(hapd_iface->bss);
 220                 os_free(hapd_iface);
 221         }
 222         return NULL;
 223 }
 224
 225
 226 static struct hostapd_iface *
 227 hostapd_interface_init(struct hapd_interfaces *interfaces,
 228                        const char *config_fname, int debug)
 229 {
 230         struct hostapd_iface *iface;
 231         int k;
 232
 233         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 234         iface = hostapd_init(config_fname);
 235         if (!iface)
 236                 return NULL;
 237         iface->interfaces = interfaces;
 238
 239         for (k = 0; k < debug; k++) {
 240                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 241                         iface->bss[0]->conf->logger_stdout_level--;
 242         }
 243
 244         if (hostapd_setup_interface(iface)) {
 245                 hostapd_interface_deinit(iface);
 246                 return NULL;
 247         }
 248
 249         return iface;
 250 }
 251
 252
 253 /**
 254  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 255  */
 256 static void handle_term(int sig, void *signal_ctx)
 257 {
 258         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 259         eloop_terminate();
 260 }
 261
 262
 263 #ifndef CONFIG_NATIVE_WINDOWS
 264 /**
 265  * handle_reload - SIGHUP handler to reload configuration
 266  */
 267 static void handle_reload(int sig, void *signal_ctx)
 268 {
 269         struct hapd_interfaces *interfaces = signal_ctx;
 270         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 271                    sig);
 272         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 273 }
 274
 275
 276 static void handle_dump_state(int sig, void *signal_ctx)
 277 {
 278 #ifdef HOSTAPD_DUMP_STATE
 279         struct hapd_interfaces *interfaces = signal_ctx;
 280         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 281 #endif /* HOSTAPD_DUMP_STATE */
 282 }
 283 #endif /* CONFIG_NATIVE_WINDOWS */
 284
 285
 286 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 287 {
 288         hostapd_logger_register_cb(hostapd_logger_cb);
 289
 290         if (eap_server_register_methods()) {
 291                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 292                 return -1;
 293         }
 294
 295         if (eloop_init()) {
 296                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 297                 return -1;
 298         }
 299
 300 #ifndef CONFIG_NATIVE_WINDOWS
 301         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 302         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 303 #endif /* CONFIG_NATIVE_WINDOWS */
 304         eloop_register_signal_terminate(handle_term, interfaces);
 305
 306 #ifndef CONFIG_NATIVE_WINDOWS
 307         openlog("hostapd", 0, LOG_DAEMON);
 308 #endif /* CONFIG_NATIVE_WINDOWS */
 309
 310         return 0;
 311 }
 312
 313
 314 static void hostapd_global_deinit(const char *pid_file)
 315 {
 316 #ifdef EAP_SERVER_TNC
 317         tncs_global_deinit();
 318 #endif /* EAP_SERVER_TNC */
 319
 320         eloop_destroy();
 321
 322 #ifndef CONFIG_NATIVE_WINDOWS
 323         closelog();
 324 #endif /* CONFIG_NATIVE_WINDOWS */
 325
 326         eap_server_unregister_methods();
 327
 328         os_daemonize_terminate(pid_file);
 329 }
 330
 331
 332 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 333                               const char *pid_file)
 334 {
 335 #ifdef EAP_SERVER_TNC
 336         int tnc = 0;
 337         size_t i, k;
 338
 339         for (i = 0; !tnc && i < ifaces->count; i++) {
 340                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 341                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 342                                 tnc++;
 343                                 break;
 344                         }
 345                 }
 346         }
 347
 348         if (tnc && tncs_global_init() < 0) {
 349                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 350                 return -1;
 351         }
 352 #endif /* EAP_SERVER_TNC */
 353
 354         if (daemonize && os_daemonize(pid_file)) {
 355                 perror("daemon");
 356                 return -1;
 357         }
 358
 359         eloop_run();
 360
 361         return 0;
 362 }
 363
 364
 365 static void show_version(void)
 366 {
 367         fprintf(stderr,
 368                 "hostapd v" VERSION_STR "\n"
 369                 "User space daemon for IEEE 802.11 AP management,\n"
 370                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 371                 "Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> "
 372                 "and contributors\n");
 373 }
 374
 375
 376 static void usage(void)
 377 {
 378         show_version();
 379         fprintf(stderr,
 380                 "\n"
 381                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 382                 "<configuration file(s)>\n"
 383                 "\n"
 384                 "options:\n"
 385                 "   -h   show this usage\n"
 386                 "   -d   show more debug messages (-dd for even more)\n"
 387                 "   -B   run daemon in the background\n"
 388                 "   -P   PID file\n"
 389                 "   -K   include key data in debug messages\n"
 390                 "   -t   include timestamps in some debug messages\n"
 391                 "   -v   show hostapd version\n");
 392
 393         exit(1);
 394 }
 395
 396
 397 int main(int argc, char *argv[])
 398 {
 399         struct hapd_interfaces interfaces;
 400         int ret = 1;
 401         size_t i;
 402         int c, debug = 0, daemonize = 0;
 403         char *pid_file = NULL;
 404
 405         if (os_program_init())
 406                 return -1;
 407
 408         for (;;) {
 409                 c = getopt(argc, argv, "BdhKP:tv");
 410                 if (c < 0)
 411                         break;
 412                 switch (c) {
 413                 case 'h':
 414                         usage();
 415                         break;
 416                 case 'd':
 417                         debug++;
 418                         if (wpa_debug_level > 0)
 419                                 wpa_debug_level--;
 420                         break;
 421                 case 'B':
 422                         daemonize++;
 423                         break;
 424                 case 'K':
 425                         wpa_debug_show_keys++;
 426                         break;
 427                 case 'P':
 428                         os_free(pid_file);
 429                         pid_file = os_rel2abs_path(optarg);
 430                         break;
 431                 case 't':
 432                         wpa_debug_timestamp++;
 433                         break;
 434                 case 'v':
 435                         show_version();
 436                         exit(1);
 437                         break;
 438
 439                 default:
 440                         usage();
 441                         break;
 442                 }
 443         }
 444
 445         if (optind == argc)
 446                 usage();
 447
 448         interfaces.count = argc - optind;
 449         interfaces.iface = os_malloc(interfaces.count *
 450                                      sizeof(struct hostapd_iface *));
 451         if (interfaces.iface == NULL) {
 452                 wpa_printf(MSG_ERROR, "malloc failed\n");
 453                 return -1;
 454         }
 455
 456         if (hostapd_global_init(&interfaces))
 457                 return -1;
 458
 459         /* Initialize interfaces */
 460         for (i = 0; i < interfaces.count; i++) {
 461                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 462                                                              argv[optind + i],
 463                                                              debug);
 464                 if (!interfaces.iface[i])
 465                         goto out;
 466         }
 467
 468         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 469                 goto out;
 470
 471         ret = 0;
 472
 473  out:
 474         /* Deinitialize all interfaces */
 475         for (i = 0; i < interfaces.count; i++)
 476                 hostapd_interface_deinit(interfaces.iface[i]);
 477         os_free(interfaces.iface);
 478
 479         hostapd_global_deinit(pid_file);
 480         os_free(pid_file);
 481
 482         os_program_deinit();
 483
 484         return ret;
 485 }