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 "drivers/driver.h"
  25 #include "eap_server/eap.h"
  26 #include "eap_server/tncs.h"
  27 #include "ap/hostapd.h"
  28 #include "ap/config.h"
  29 #include "config_file.h"
  30
  31
  32 extern int wpa_debug_level;
  33 extern int wpa_debug_show_keys;
  34 extern int wpa_debug_timestamp;
  35
  36
  37 struct hapd_interfaces {
  38         size_t count;
  39         struct hostapd_iface **iface;
  40 };
  41
  42
  43 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  44                                int (*cb)(struct hostapd_iface *iface,
  45                                          void *ctx), void *ctx)
  46 {
  47         size_t i;
  48         int ret;
  49
  50         for (i = 0; i < interfaces->count; i++) {
  51                 ret = cb(interfaces->iface[i], ctx);
  52                 if (ret)
  53                         return ret;
  54         }
  55
  56         return 0;
  57 }
  58
  59
  60 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  61 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  62                               int level, const char *txt, size_t len)
  63 {
  64         struct hostapd_data *hapd = ctx;
  65         char *format, *module_str;
  66         int maxlen;
  67         int conf_syslog_level, conf_stdout_level;
  68         unsigned int conf_syslog, conf_stdout;
  69
  70         maxlen = len + 100;
  71         format = os_malloc(maxlen);
  72         if (!format)
  73                 return;
  74
  75         if (hapd && hapd->conf) {
  76                 conf_syslog_level = hapd->conf->logger_syslog_level;
  77                 conf_stdout_level = hapd->conf->logger_stdout_level;
  78                 conf_syslog = hapd->conf->logger_syslog;
  79                 conf_stdout = hapd->conf->logger_stdout;
  80         } else {
  81                 conf_syslog_level = conf_stdout_level = 0;
  82                 conf_syslog = conf_stdout = (unsigned int) -1;
  83         }
  84
  85         switch (module) {
  86         case HOSTAPD_MODULE_IEEE80211:
  87                 module_str = "IEEE 802.11";
  88                 break;
  89         case HOSTAPD_MODULE_IEEE8021X:
  90                 module_str = "IEEE 802.1X";
  91                 break;
  92         case HOSTAPD_MODULE_RADIUS:
  93                 module_str = "RADIUS";
  94                 break;
  95         case HOSTAPD_MODULE_WPA:
  96                 module_str = "WPA";
  97                 break;
  98         case HOSTAPD_MODULE_DRIVER:
  99                 module_str = "DRIVER";
 100                 break;
 101         case HOSTAPD_MODULE_IAPP:
 102                 module_str = "IAPP";
 103                 break;
 104         case HOSTAPD_MODULE_MLME:
 105                 module_str = "MLME";
 106                 break;
 107         default:
 108                 module_str = NULL;
 109                 break;
 110         }
 111
 112         if (hapd && hapd->conf && addr)
 113                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 114                             hapd->conf->iface, MAC2STR(addr),
 115                             module_str ? " " : "", module_str, txt);
 116         else if (hapd && hapd->conf)
 117                 os_snprintf(format, maxlen, "%s:%s%s %s",
 118                             hapd->conf->iface, module_str ? " " : "",
 119                             module_str, txt);
 120         else if (addr)
 121                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 122                             MAC2STR(addr), module_str ? " " : "",
 123                             module_str, txt);
 124         else
 125                 os_snprintf(format, maxlen, "%s%s%s",
 126                             module_str, module_str ? ": " : "", txt);
 127
 128         if ((conf_stdout & module) && level >= conf_stdout_level) {
 129                 wpa_debug_print_timestamp();
 130                 printf("%s\n", format);
 131         }
 132
 133 #ifndef CONFIG_NATIVE_WINDOWS
 134         if ((conf_syslog & module) && level >= conf_syslog_level) {
 135                 int priority;
 136                 switch (level) {
 137                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 138                 case HOSTAPD_LEVEL_DEBUG:
 139                         priority = LOG_DEBUG;
 140                         break;
 141                 case HOSTAPD_LEVEL_INFO:
 142                         priority = LOG_INFO;
 143                         break;
 144                 case HOSTAPD_LEVEL_NOTICE:
 145                         priority = LOG_NOTICE;
 146                         break;
 147                 case HOSTAPD_LEVEL_WARNING:
 148                         priority = LOG_WARNING;
 149                         break;
 150                 default:
 151                         priority = LOG_INFO;
 152                         break;
 153                 }
 154                 syslog(priority, "%s", format);
 155         }
 156 #endif /* CONFIG_NATIVE_WINDOWS */
 157
 158         os_free(format);
 159 }
 160 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 161
 162
 163 /**
 164  * hostapd_init - Allocate and initialize per-interface data
 165  * @config_file: Path to the configuration file
 166  * Returns: Pointer to the allocated interface data or %NULL on failure
 167  *
 168  * This function is used to allocate main data structures for per-interface
 169  * data. The allocated data buffer will be freed by calling
 170  * hostapd_cleanup_iface().
 171  */
 172 static struct hostapd_iface * hostapd_init(const char *config_file)
 173 {
 174         struct hostapd_iface *hapd_iface = NULL;
 175         struct hostapd_config *conf = NULL;
 176         struct hostapd_data *hapd;
 177         size_t i;
 178
 179         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 180         if (hapd_iface == NULL)
 181                 goto fail;
 182
 183         hapd_iface->reload_config = hostapd_reload_config;
 184         hapd_iface->config_read_cb = hostapd_config_read;
 185         hapd_iface->config_fname = os_strdup(config_file);
 186         if (hapd_iface->config_fname == NULL)
 187                 goto fail;
 188
 189         conf = hostapd_config_read(hapd_iface->config_fname);
 190         if (conf == NULL)
 191                 goto fail;
 192         hapd_iface->conf = conf;
 193
 194         hapd_iface->num_bss = conf->num_bss;
 195         hapd_iface->bss = os_zalloc(conf->num_bss *
 196                                     sizeof(struct hostapd_data *));
 197         if (hapd_iface->bss == NULL)
 198                 goto fail;
 199
 200         for (i = 0; i < conf->num_bss; i++) {
 201                 hapd = hapd_iface->bss[i] =
 202                         hostapd_alloc_bss_data(hapd_iface, conf,
 203                                                &conf->bss[i]);
 204                 if (hapd == NULL)
 205                         goto fail;
 206         }
 207
 208         return hapd_iface;
 209
 210 fail:
 211         if (conf)
 212                 hostapd_config_free(conf);
 213         if (hapd_iface) {
 214                 for (i = 0; hapd_iface->bss && i < hapd_iface->num_bss; i++) {
 215                         hapd = hapd_iface->bss[i];
 216                         if (hapd && hapd->ssl_ctx)
 217                                 tls_deinit(hapd->ssl_ctx);
 218                 }
 219
 220                 os_free(hapd_iface->config_fname);
 221                 os_free(hapd_iface->bss);
 222                 os_free(hapd_iface);
 223         }
 224         return NULL;
 225 }
 226
 227
 228 static int hostapd_driver_init(struct hostapd_iface *iface)
 229 {
 230         struct wpa_init_params params;
 231         size_t i;
 232         struct hostapd_data *hapd = iface->bss[0];
 233         struct hostapd_bss_config *conf = hapd->conf;
 234         u8 *b = conf->bssid;
 235
 236         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 237                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 238                 return -1;
 239         }
 240
 241         /* Initialize the driver interface */
 242         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 243                 b = NULL;
 244
 245         os_memset(&params, 0, sizeof(params));
 246         params.bssid = b;
 247         params.ifname = hapd->conf->iface;
 248         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 249         params.ssid_len = hapd->conf->ssid.ssid_len;
 250         params.test_socket = hapd->conf->test_socket;
 251         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 252
 253         params.num_bridge = hapd->iface->num_bss;
 254         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 255         if (params.bridge == NULL)
 256                 return -1;
 257         for (i = 0; i < hapd->iface->num_bss; i++) {
 258                 struct hostapd_data *bss = hapd->iface->bss[i];
 259                 if (bss->conf->bridge[0])
 260                         params.bridge[i] = bss->conf->bridge;
 261         }
 262
 263         params.own_addr = hapd->own_addr;
 264
 265         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 266         os_free(params.bridge);
 267         if (hapd->drv_priv == NULL) {
 268                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 269                            hapd->driver->name);
 270                 hapd->driver = NULL;
 271                 return -1;
 272         }
 273
 274         return 0;
 275 }
 276
 277
 278 static struct hostapd_iface *
 279 hostapd_interface_init(struct hapd_interfaces *interfaces,
 280                        const char *config_fname, int debug)
 281 {
 282         struct hostapd_iface *iface;
 283         int k;
 284
 285         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 286         iface = hostapd_init(config_fname);
 287         if (!iface)
 288                 return NULL;
 289         iface->interfaces = interfaces;
 290
 291         for (k = 0; k < debug; k++) {
 292                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 293                         iface->bss[0]->conf->logger_stdout_level--;
 294         }
 295
 296         if (hostapd_driver_init(iface) ||
 297             hostapd_setup_interface(iface)) {
 298                 hostapd_interface_deinit(iface);
 299                 return NULL;
 300         }
 301
 302         return iface;
 303 }
 304
 305
 306 /**
 307  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 308  */
 309 static void handle_term(int sig, void *signal_ctx)
 310 {
 311         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 312         eloop_terminate();
 313 }
 314
 315
 316 #ifndef CONFIG_NATIVE_WINDOWS
 317 /**
 318  * handle_reload - SIGHUP handler to reload configuration
 319  */
 320 static void handle_reload(int sig, void *signal_ctx)
 321 {
 322         struct hapd_interfaces *interfaces = signal_ctx;
 323         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 324                    sig);
 325         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 326 }
 327
 328
 329 static void handle_dump_state(int sig, void *signal_ctx)
 330 {
 331 #ifdef HOSTAPD_DUMP_STATE
 332         struct hapd_interfaces *interfaces = signal_ctx;
 333         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 334 #endif /* HOSTAPD_DUMP_STATE */
 335 }
 336 #endif /* CONFIG_NATIVE_WINDOWS */
 337
 338
 339 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 340 {
 341         hostapd_logger_register_cb(hostapd_logger_cb);
 342
 343         if (eap_server_register_methods()) {
 344                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 345                 return -1;
 346         }
 347
 348         if (eloop_init()) {
 349                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 350                 return -1;
 351         }
 352
 353 #ifndef CONFIG_NATIVE_WINDOWS
 354         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 355         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 356 #endif /* CONFIG_NATIVE_WINDOWS */
 357         eloop_register_signal_terminate(handle_term, interfaces);
 358
 359 #ifndef CONFIG_NATIVE_WINDOWS
 360         openlog("hostapd", 0, LOG_DAEMON);
 361 #endif /* CONFIG_NATIVE_WINDOWS */
 362
 363         return 0;
 364 }
 365
 366
 367 static void hostapd_global_deinit(const char *pid_file)
 368 {
 369 #ifdef EAP_SERVER_TNC
 370         tncs_global_deinit();
 371 #endif /* EAP_SERVER_TNC */
 372
 373         eloop_destroy();
 374
 375 #ifndef CONFIG_NATIVE_WINDOWS
 376         closelog();
 377 #endif /* CONFIG_NATIVE_WINDOWS */
 378
 379         eap_server_unregister_methods();
 380
 381         os_daemonize_terminate(pid_file);
 382 }
 383
 384
 385 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 386                               const char *pid_file)
 387 {
 388 #ifdef EAP_SERVER_TNC
 389         int tnc = 0;
 390         size_t i, k;
 391
 392         for (i = 0; !tnc && i < ifaces->count; i++) {
 393                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 394                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 395                                 tnc++;
 396                                 break;
 397                         }
 398                 }
 399         }
 400
 401         if (tnc && tncs_global_init() < 0) {
 402                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 403                 return -1;
 404         }
 405 #endif /* EAP_SERVER_TNC */
 406
 407         if (daemonize && os_daemonize(pid_file)) {
 408                 perror("daemon");
 409                 return -1;
 410         }
 411
 412         eloop_run();
 413
 414         return 0;
 415 }
 416
 417
 418 static void show_version(void)
 419 {
 420         fprintf(stderr,
 421                 "hostapd v" VERSION_STR "\n"
 422                 "User space daemon for IEEE 802.11 AP management,\n"
 423                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 424                 "Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> "
 425                 "and contributors\n");
 426 }
 427
 428
 429 static void usage(void)
 430 {
 431         show_version();
 432         fprintf(stderr,
 433                 "\n"
 434                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 435                 "<configuration file(s)>\n"
 436                 "\n"
 437                 "options:\n"
 438                 "   -h   show this usage\n"
 439                 "   -d   show more debug messages (-dd for even more)\n"
 440                 "   -B   run daemon in the background\n"
 441                 "   -P   PID file\n"
 442                 "   -K   include key data in debug messages\n"
 443                 "   -t   include timestamps in some debug messages\n"
 444                 "   -v   show hostapd version\n");
 445
 446         exit(1);
 447 }
 448
 449
 450 int main(int argc, char *argv[])
 451 {
 452         struct hapd_interfaces interfaces;
 453         int ret = 1;
 454         size_t i;
 455         int c, debug = 0, daemonize = 0;
 456         char *pid_file = NULL;
 457
 458         if (os_program_init())
 459                 return -1;
 460
 461         for (;;) {
 462                 c = getopt(argc, argv, "BdhKP:tv");
 463                 if (c < 0)
 464                         break;
 465                 switch (c) {
 466                 case 'h':
 467                         usage();
 468                         break;
 469                 case 'd':
 470                         debug++;
 471                         if (wpa_debug_level > 0)
 472                                 wpa_debug_level--;
 473                         break;
 474                 case 'B':
 475                         daemonize++;
 476                         break;
 477                 case 'K':
 478                         wpa_debug_show_keys++;
 479                         break;
 480                 case 'P':
 481                         os_free(pid_file);
 482                         pid_file = os_rel2abs_path(optarg);
 483                         break;
 484                 case 't':
 485                         wpa_debug_timestamp++;
 486                         break;
 487                 case 'v':
 488                         show_version();
 489                         exit(1);
 490                         break;
 491
 492                 default:
 493                         usage();
 494                         break;
 495                 }
 496         }
 497
 498         if (optind == argc)
 499                 usage();
 500
 501         interfaces.count = argc - optind;
 502         interfaces.iface = os_malloc(interfaces.count *
 503                                      sizeof(struct hostapd_iface *));
 504         if (interfaces.iface == NULL) {
 505                 wpa_printf(MSG_ERROR, "malloc failed\n");
 506                 return -1;
 507         }
 508
 509         if (hostapd_global_init(&interfaces))
 510                 return -1;
 511
 512         /* Initialize interfaces */
 513         for (i = 0; i < interfaces.count; i++) {
 514                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 515                                                              argv[optind + i],
 516                                                              debug);
 517                 if (!interfaces.iface[i])
 518                         goto out;
 519         }
 520
 521         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 522                 goto out;
 523
 524         ret = 0;
 525
 526  out:
 527         /* Deinitialize all interfaces */
 528         for (i = 0; i < interfaces.count; i++)
 529                 hostapd_interface_deinit(interfaces.iface[i]);
 530         os_free(interfaces.iface);
 531
 532         hostapd_global_deinit(pid_file);
 533         os_free(pid_file);
 534
 535         os_program_deinit();
 536
 537         return ret;
 538 }