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 #include "eap_register.h"
  31 #include "dump_state.h"
  32
  33
  34 extern int wpa_debug_level;
  35 extern int wpa_debug_show_keys;
  36 extern int wpa_debug_timestamp;
  37
  38
  39 struct hapd_interfaces {
  40         size_t count;
  41         struct hostapd_iface **iface;
  42 };
  43
  44
  45 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  46                                int (*cb)(struct hostapd_iface *iface,
  47                                          void *ctx), void *ctx)
  48 {
  49         size_t i;
  50         int ret;
  51
  52         for (i = 0; i < interfaces->count; i++) {
  53                 ret = cb(interfaces->iface[i], ctx);
  54                 if (ret)
  55                         return ret;
  56         }
  57
  58         return 0;
  59 }
  60
  61
  62 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  63 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  64                               int level, const char *txt, size_t len)
  65 {
  66         struct hostapd_data *hapd = ctx;
  67         char *format, *module_str;
  68         int maxlen;
  69         int conf_syslog_level, conf_stdout_level;
  70         unsigned int conf_syslog, conf_stdout;
  71
  72         maxlen = len + 100;
  73         format = os_malloc(maxlen);
  74         if (!format)
  75                 return;
  76
  77         if (hapd && hapd->conf) {
  78                 conf_syslog_level = hapd->conf->logger_syslog_level;
  79                 conf_stdout_level = hapd->conf->logger_stdout_level;
  80                 conf_syslog = hapd->conf->logger_syslog;
  81                 conf_stdout = hapd->conf->logger_stdout;
  82         } else {
  83                 conf_syslog_level = conf_stdout_level = 0;
  84                 conf_syslog = conf_stdout = (unsigned int) -1;
  85         }
  86
  87         switch (module) {
  88         case HOSTAPD_MODULE_IEEE80211:
  89                 module_str = "IEEE 802.11";
  90                 break;
  91         case HOSTAPD_MODULE_IEEE8021X:
  92                 module_str = "IEEE 802.1X";
  93                 break;
  94         case HOSTAPD_MODULE_RADIUS:
  95                 module_str = "RADIUS";
  96                 break;
  97         case HOSTAPD_MODULE_WPA:
  98                 module_str = "WPA";
  99                 break;
 100         case HOSTAPD_MODULE_DRIVER:
 101                 module_str = "DRIVER";
 102                 break;
 103         case HOSTAPD_MODULE_IAPP:
 104                 module_str = "IAPP";
 105                 break;
 106         case HOSTAPD_MODULE_MLME:
 107                 module_str = "MLME";
 108                 break;
 109         default:
 110                 module_str = NULL;
 111                 break;
 112         }
 113
 114         if (hapd && hapd->conf && addr)
 115                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 116                             hapd->conf->iface, MAC2STR(addr),
 117                             module_str ? " " : "", module_str, txt);
 118         else if (hapd && hapd->conf)
 119                 os_snprintf(format, maxlen, "%s:%s%s %s",
 120                             hapd->conf->iface, module_str ? " " : "",
 121                             module_str, txt);
 122         else if (addr)
 123                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 124                             MAC2STR(addr), module_str ? " " : "",
 125                             module_str, txt);
 126         else
 127                 os_snprintf(format, maxlen, "%s%s%s",
 128                             module_str, module_str ? ": " : "", txt);
 129
 130         if ((conf_stdout & module) && level >= conf_stdout_level) {
 131                 wpa_debug_print_timestamp();
 132                 printf("%s\n", format);
 133         }
 134
 135 #ifndef CONFIG_NATIVE_WINDOWS
 136         if ((conf_syslog & module) && level >= conf_syslog_level) {
 137                 int priority;
 138                 switch (level) {
 139                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 140                 case HOSTAPD_LEVEL_DEBUG:
 141                         priority = LOG_DEBUG;
 142                         break;
 143                 case HOSTAPD_LEVEL_INFO:
 144                         priority = LOG_INFO;
 145                         break;
 146                 case HOSTAPD_LEVEL_NOTICE:
 147                         priority = LOG_NOTICE;
 148                         break;
 149                 case HOSTAPD_LEVEL_WARNING:
 150                         priority = LOG_WARNING;
 151                         break;
 152                 default:
 153                         priority = LOG_INFO;
 154                         break;
 155                 }
 156                 syslog(priority, "%s", format);
 157         }
 158 #endif /* CONFIG_NATIVE_WINDOWS */
 159
 160         os_free(format);
 161 }
 162 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 163
 164
 165 /**
 166  * hostapd_init - Allocate and initialize per-interface data
 167  * @config_file: Path to the configuration file
 168  * Returns: Pointer to the allocated interface data or %NULL on failure
 169  *
 170  * This function is used to allocate main data structures for per-interface
 171  * data. The allocated data buffer will be freed by calling
 172  * hostapd_cleanup_iface().
 173  */
 174 static struct hostapd_iface * hostapd_init(const char *config_file)
 175 {
 176         struct hostapd_iface *hapd_iface = NULL;
 177         struct hostapd_config *conf = NULL;
 178         struct hostapd_data *hapd;
 179         size_t i;
 180
 181         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 182         if (hapd_iface == NULL)
 183                 goto fail;
 184
 185         hapd_iface->reload_config = hostapd_reload_config;
 186         hapd_iface->config_read_cb = hostapd_config_read;
 187         hapd_iface->config_fname = os_strdup(config_file);
 188         if (hapd_iface->config_fname == NULL)
 189                 goto fail;
 190
 191         conf = hostapd_config_read(hapd_iface->config_fname);
 192         if (conf == NULL)
 193                 goto fail;
 194         hapd_iface->conf = conf;
 195
 196         hapd_iface->num_bss = conf->num_bss;
 197         hapd_iface->bss = os_zalloc(conf->num_bss *
 198                                     sizeof(struct hostapd_data *));
 199         if (hapd_iface->bss == NULL)
 200                 goto fail;
 201
 202         for (i = 0; i < conf->num_bss; i++) {
 203                 hapd = hapd_iface->bss[i] =
 204                         hostapd_alloc_bss_data(hapd_iface, conf,
 205                                                &conf->bss[i]);
 206                 if (hapd == NULL)
 207                         goto fail;
 208         }
 209
 210         return hapd_iface;
 211
 212 fail:
 213         if (conf)
 214                 hostapd_config_free(conf);
 215         if (hapd_iface) {
 216                 os_free(hapd_iface->config_fname);
 217                 os_free(hapd_iface->bss);
 218                 os_free(hapd_iface);
 219         }
 220         return NULL;
 221 }
 222
 223
 224 static int hostapd_driver_init(struct hostapd_iface *iface)
 225 {
 226         struct wpa_init_params params;
 227         size_t i;
 228         struct hostapd_data *hapd = iface->bss[0];
 229         struct hostapd_bss_config *conf = hapd->conf;
 230         u8 *b = conf->bssid;
 231
 232         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 233                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 234                 return -1;
 235         }
 236
 237         /* Initialize the driver interface */
 238         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 239                 b = NULL;
 240
 241         os_memset(&params, 0, sizeof(params));
 242         params.bssid = b;
 243         params.ifname = hapd->conf->iface;
 244         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 245         params.ssid_len = hapd->conf->ssid.ssid_len;
 246         params.test_socket = hapd->conf->test_socket;
 247         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 248
 249         params.num_bridge = hapd->iface->num_bss;
 250         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 251         if (params.bridge == NULL)
 252                 return -1;
 253         for (i = 0; i < hapd->iface->num_bss; i++) {
 254                 struct hostapd_data *bss = hapd->iface->bss[i];
 255                 if (bss->conf->bridge[0])
 256                         params.bridge[i] = bss->conf->bridge;
 257         }
 258
 259         params.own_addr = hapd->own_addr;
 260
 261         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 262         os_free(params.bridge);
 263         if (hapd->drv_priv == NULL) {
 264                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 265                            hapd->driver->name);
 266                 hapd->driver = NULL;
 267                 return -1;
 268         }
 269
 270         return 0;
 271 }
 272
 273
 274 static struct hostapd_iface *
 275 hostapd_interface_init(struct hapd_interfaces *interfaces,
 276                        const char *config_fname, int debug)
 277 {
 278         struct hostapd_iface *iface;
 279         int k;
 280
 281         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 282         iface = hostapd_init(config_fname);
 283         if (!iface)
 284                 return NULL;
 285         iface->interfaces = interfaces;
 286
 287         for (k = 0; k < debug; k++) {
 288                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 289                         iface->bss[0]->conf->logger_stdout_level--;
 290         }
 291
 292         if (hostapd_driver_init(iface) ||
 293             hostapd_setup_interface(iface)) {
 294                 hostapd_interface_deinit(iface);
 295                 return NULL;
 296         }
 297
 298         return iface;
 299 }
 300
 301
 302 /**
 303  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 304  */
 305 static void handle_term(int sig, void *signal_ctx)
 306 {
 307         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 308         eloop_terminate();
 309 }
 310
 311
 312 #ifndef CONFIG_NATIVE_WINDOWS
 313
 314 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 315 {
 316         if (hostapd_reload_config(iface) < 0) {
 317                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 318                            "file - continuing with old.");
 319         }
 320         return 0;
 321 }
 322
 323
 324 /**
 325  * handle_reload - SIGHUP handler to reload configuration
 326  */
 327 static void handle_reload(int sig, void *signal_ctx)
 328 {
 329         struct hapd_interfaces *interfaces = signal_ctx;
 330         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 331                    sig);
 332         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 333 }
 334
 335
 336 static void handle_dump_state(int sig, void *signal_ctx)
 337 {
 338 #ifdef HOSTAPD_DUMP_STATE
 339         struct hapd_interfaces *interfaces = signal_ctx;
 340         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 341 #endif /* HOSTAPD_DUMP_STATE */
 342 }
 343 #endif /* CONFIG_NATIVE_WINDOWS */
 344
 345
 346 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 347 {
 348         hostapd_logger_register_cb(hostapd_logger_cb);
 349
 350         if (eap_server_register_methods()) {
 351                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 352                 return -1;
 353         }
 354
 355         if (eloop_init()) {
 356                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 357                 return -1;
 358         }
 359
 360 #ifndef CONFIG_NATIVE_WINDOWS
 361         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 362         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 363 #endif /* CONFIG_NATIVE_WINDOWS */
 364         eloop_register_signal_terminate(handle_term, interfaces);
 365
 366 #ifndef CONFIG_NATIVE_WINDOWS
 367         openlog("hostapd", 0, LOG_DAEMON);
 368 #endif /* CONFIG_NATIVE_WINDOWS */
 369
 370         return 0;
 371 }
 372
 373
 374 static void hostapd_global_deinit(const char *pid_file)
 375 {
 376 #ifdef EAP_SERVER_TNC
 377         tncs_global_deinit();
 378 #endif /* EAP_SERVER_TNC */
 379
 380         eloop_destroy();
 381
 382 #ifndef CONFIG_NATIVE_WINDOWS
 383         closelog();
 384 #endif /* CONFIG_NATIVE_WINDOWS */
 385
 386         eap_server_unregister_methods();
 387
 388         os_daemonize_terminate(pid_file);
 389 }
 390
 391
 392 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 393                               const char *pid_file)
 394 {
 395 #ifdef EAP_SERVER_TNC
 396         int tnc = 0;
 397         size_t i, k;
 398
 399         for (i = 0; !tnc && i < ifaces->count; i++) {
 400                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 401                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 402                                 tnc++;
 403                                 break;
 404                         }
 405                 }
 406         }
 407
 408         if (tnc && tncs_global_init() < 0) {
 409                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 410                 return -1;
 411         }
 412 #endif /* EAP_SERVER_TNC */
 413
 414         if (daemonize && os_daemonize(pid_file)) {
 415                 perror("daemon");
 416                 return -1;
 417         }
 418
 419         eloop_run();
 420
 421         return 0;
 422 }
 423
 424
 425 static void show_version(void)
 426 {
 427         fprintf(stderr,
 428                 "hostapd v" VERSION_STR "\n"
 429                 "User space daemon for IEEE 802.11 AP management,\n"
 430                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 431                 "Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> "
 432                 "and contributors\n");
 433 }
 434
 435
 436 static void usage(void)
 437 {
 438         show_version();
 439         fprintf(stderr,
 440                 "\n"
 441                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 442                 "<configuration file(s)>\n"
 443                 "\n"
 444                 "options:\n"
 445                 "   -h   show this usage\n"
 446                 "   -d   show more debug messages (-dd for even more)\n"
 447                 "   -B   run daemon in the background\n"
 448                 "   -P   PID file\n"
 449                 "   -K   include key data in debug messages\n"
 450                 "   -t   include timestamps in some debug messages\n"
 451                 "   -v   show hostapd version\n");
 452
 453         exit(1);
 454 }
 455
 456
 457 int main(int argc, char *argv[])
 458 {
 459         struct hapd_interfaces interfaces;
 460         int ret = 1;
 461         size_t i;
 462         int c, debug = 0, daemonize = 0;
 463         char *pid_file = NULL;
 464
 465         if (os_program_init())
 466                 return -1;
 467
 468         for (;;) {
 469                 c = getopt(argc, argv, "BdhKP:tv");
 470                 if (c < 0)
 471                         break;
 472                 switch (c) {
 473                 case 'h':
 474                         usage();
 475                         break;
 476                 case 'd':
 477                         debug++;
 478                         if (wpa_debug_level > 0)
 479                                 wpa_debug_level--;
 480                         break;
 481                 case 'B':
 482                         daemonize++;
 483                         break;
 484                 case 'K':
 485                         wpa_debug_show_keys++;
 486                         break;
 487                 case 'P':
 488                         os_free(pid_file);
 489                         pid_file = os_rel2abs_path(optarg);
 490                         break;
 491                 case 't':
 492                         wpa_debug_timestamp++;
 493                         break;
 494                 case 'v':
 495                         show_version();
 496                         exit(1);
 497                         break;
 498
 499                 default:
 500                         usage();
 501                         break;
 502                 }
 503         }
 504
 505         if (optind == argc)
 506                 usage();
 507
 508         interfaces.count = argc - optind;
 509         interfaces.iface = os_malloc(interfaces.count *
 510                                      sizeof(struct hostapd_iface *));
 511         if (interfaces.iface == NULL) {
 512                 wpa_printf(MSG_ERROR, "malloc failed\n");
 513                 return -1;
 514         }
 515
 516         if (hostapd_global_init(&interfaces))
 517                 return -1;
 518
 519         /* Initialize interfaces */
 520         for (i = 0; i < interfaces.count; i++) {
 521                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 522                                                              argv[optind + i],
 523                                                              debug);
 524                 if (!interfaces.iface[i])
 525                         goto out;
 526         }
 527
 528         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 529                 goto out;
 530
 531         ret = 0;
 532
 533  out:
 534         /* Deinitialize all interfaces */
 535         for (i = 0; i < interfaces.count; i++)
 536                 hostapd_interface_deinit(interfaces.iface[i]);
 537         os_free(interfaces.iface);
 538
 539         hostapd_global_deinit(pid_file);
 540         os_free(pid_file);
 541
 542         os_program_deinit();
 543
 544         return ret;
 545 }