hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2011, 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 "utils/includes.h"
  16 #ifndef CONFIG_NATIVE_WINDOWS
  17 #include <syslog.h>
  18 #endif /* CONFIG_NATIVE_WINDOWS */
  19
  20 #include "utils/common.h"
  21 #include "utils/eloop.h"
  22 #include "crypto/random.h"
  23 #include "crypto/tls.h"
  24 #include "common/version.h"
  25 #include "drivers/driver.h"
  26 #include "eap_server/eap.h"
  27 #include "eap_server/tncs.h"
  28 #include "ap/hostapd.h"
  29 #include "ap/ap_config.h"
  30 #include "config_file.h"
  31 #include "eap_register.h"
  32 #include "dump_state.h"
  33 #include "ctrl_iface.h"
  34
  35
  36 extern int wpa_debug_level;
  37 extern int wpa_debug_show_keys;
  38 extern int wpa_debug_timestamp;
  39
  40
  41 struct hapd_interfaces {
  42         size_t count;
  43         struct hostapd_iface **iface;
  44 };
  45
  46
  47 static int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  48                                       int (*cb)(struct hostapd_iface *iface,
  49                                                 void *ctx), void *ctx)
  50 {
  51         size_t i;
  52         int ret;
  53
  54         for (i = 0; i < interfaces->count; i++) {
  55                 ret = cb(interfaces->iface[i], ctx);
  56                 if (ret)
  57                         return ret;
  58         }
  59
  60         return 0;
  61 }
  62
  63
  64 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  65 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  66                               int level, const char *txt, size_t len)
  67 {
  68         struct hostapd_data *hapd = ctx;
  69         char *format, *module_str;
  70         int maxlen;
  71         int conf_syslog_level, conf_stdout_level;
  72         unsigned int conf_syslog, conf_stdout;
  73
  74         maxlen = len + 100;
  75         format = os_malloc(maxlen);
  76         if (!format)
  77                 return;
  78
  79         if (hapd && hapd->conf) {
  80                 conf_syslog_level = hapd->conf->logger_syslog_level;
  81                 conf_stdout_level = hapd->conf->logger_stdout_level;
  82                 conf_syslog = hapd->conf->logger_syslog;
  83                 conf_stdout = hapd->conf->logger_stdout;
  84         } else {
  85                 conf_syslog_level = conf_stdout_level = 0;
  86                 conf_syslog = conf_stdout = (unsigned int) -1;
  87         }
  88
  89         switch (module) {
  90         case HOSTAPD_MODULE_IEEE80211:
  91                 module_str = "IEEE 802.11";
  92                 break;
  93         case HOSTAPD_MODULE_IEEE8021X:
  94                 module_str = "IEEE 802.1X";
  95                 break;
  96         case HOSTAPD_MODULE_RADIUS:
  97                 module_str = "RADIUS";
  98                 break;
  99         case HOSTAPD_MODULE_WPA:
 100                 module_str = "WPA";
 101                 break;
 102         case HOSTAPD_MODULE_DRIVER:
 103                 module_str = "DRIVER";
 104                 break;
 105         case HOSTAPD_MODULE_IAPP:
 106                 module_str = "IAPP";
 107                 break;
 108         case HOSTAPD_MODULE_MLME:
 109                 module_str = "MLME";
 110                 break;
 111         default:
 112                 module_str = NULL;
 113                 break;
 114         }
 115
 116         if (hapd && hapd->conf && addr)
 117                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 118                             hapd->conf->iface, MAC2STR(addr),
 119                             module_str ? " " : "", module_str, txt);
 120         else if (hapd && hapd->conf)
 121                 os_snprintf(format, maxlen, "%s:%s%s %s",
 122                             hapd->conf->iface, module_str ? " " : "",
 123                             module_str, txt);
 124         else if (addr)
 125                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 126                             MAC2STR(addr), module_str ? " " : "",
 127                             module_str, txt);
 128         else
 129                 os_snprintf(format, maxlen, "%s%s%s",
 130                             module_str, module_str ? ": " : "", txt);
 131
 132         if ((conf_stdout & module) && level >= conf_stdout_level) {
 133                 wpa_debug_print_timestamp();
 134                 printf("%s\n", format);
 135         }
 136
 137 #ifndef CONFIG_NATIVE_WINDOWS
 138         if ((conf_syslog & module) && level >= conf_syslog_level) {
 139                 int priority;
 140                 switch (level) {
 141                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 142                 case HOSTAPD_LEVEL_DEBUG:
 143                         priority = LOG_DEBUG;
 144                         break;
 145                 case HOSTAPD_LEVEL_INFO:
 146                         priority = LOG_INFO;
 147                         break;
 148                 case HOSTAPD_LEVEL_NOTICE:
 149                         priority = LOG_NOTICE;
 150                         break;
 151                 case HOSTAPD_LEVEL_WARNING:
 152                         priority = LOG_WARNING;
 153                         break;
 154                 default:
 155                         priority = LOG_INFO;
 156                         break;
 157                 }
 158                 syslog(priority, "%s", format);
 159         }
 160 #endif /* CONFIG_NATIVE_WINDOWS */
 161
 162         os_free(format);
 163 }
 164 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 165
 166
 167 /**
 168  * hostapd_init - Allocate and initialize per-interface data
 169  * @config_file: Path to the configuration file
 170  * Returns: Pointer to the allocated interface data or %NULL on failure
 171  *
 172  * This function is used to allocate main data structures for per-interface
 173  * data. The allocated data buffer will be freed by calling
 174  * hostapd_cleanup_iface().
 175  */
 176 static struct hostapd_iface * hostapd_init(const char *config_file)
 177 {
 178         struct hostapd_iface *hapd_iface = NULL;
 179         struct hostapd_config *conf = NULL;
 180         struct hostapd_data *hapd;
 181         size_t i;
 182
 183         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 184         if (hapd_iface == NULL)
 185                 goto fail;
 186
 187         hapd_iface->reload_config = hostapd_reload_config;
 188         hapd_iface->config_read_cb = hostapd_config_read;
 189         hapd_iface->config_fname = os_strdup(config_file);
 190         if (hapd_iface->config_fname == NULL)
 191                 goto fail;
 192         hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
 193         hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 194         hapd_iface->for_each_interface = hostapd_for_each_interface;
 195
 196         conf = hostapd_config_read(hapd_iface->config_fname);
 197         if (conf == NULL)
 198                 goto fail;
 199         hapd_iface->conf = conf;
 200
 201         hapd_iface->num_bss = conf->num_bss;
 202         hapd_iface->bss = os_zalloc(conf->num_bss *
 203                                     sizeof(struct hostapd_data *));
 204         if (hapd_iface->bss == NULL)
 205                 goto fail;
 206
 207         for (i = 0; i < conf->num_bss; i++) {
 208                 hapd = hapd_iface->bss[i] =
 209                         hostapd_alloc_bss_data(hapd_iface, conf,
 210                                                &conf->bss[i]);
 211                 if (hapd == NULL)
 212                         goto fail;
 213                 hapd->msg_ctx = hapd;
 214         }
 215
 216         return hapd_iface;
 217
 218 fail:
 219         if (conf)
 220                 hostapd_config_free(conf);
 221         if (hapd_iface) {
 222                 os_free(hapd_iface->config_fname);
 223                 os_free(hapd_iface->bss);
 224                 os_free(hapd_iface);
 225         }
 226         return NULL;
 227 }
 228
 229
 230 static int hostapd_driver_init(struct hostapd_iface *iface)
 231 {
 232         struct wpa_init_params params;
 233         size_t i;
 234         struct hostapd_data *hapd = iface->bss[0];
 235         struct hostapd_bss_config *conf = hapd->conf;
 236         u8 *b = conf->bssid;
 237         struct wpa_driver_capa capa;
 238
 239         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 240                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 241                 return -1;
 242         }
 243
 244         /* Initialize the driver interface */
 245         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 246                 b = NULL;
 247
 248         os_memset(&params, 0, sizeof(params));
 249         params.bssid = b;
 250         params.ifname = hapd->conf->iface;
 251         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 252         params.ssid_len = hapd->conf->ssid.ssid_len;
 253         params.test_socket = hapd->conf->test_socket;
 254         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 255
 256         params.num_bridge = hapd->iface->num_bss;
 257         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 258         if (params.bridge == NULL)
 259                 return -1;
 260         for (i = 0; i < hapd->iface->num_bss; i++) {
 261                 struct hostapd_data *bss = hapd->iface->bss[i];
 262                 if (bss->conf->bridge[0])
 263                         params.bridge[i] = bss->conf->bridge;
 264         }
 265
 266         params.own_addr = hapd->own_addr;
 267
 268         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 269         os_free(params.bridge);
 270         if (hapd->drv_priv == NULL) {
 271                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 272                            hapd->driver->name);
 273                 hapd->driver = NULL;
 274                 return -1;
 275         }
 276
 277         if (hapd->driver->get_capa &&
 278             hapd->driver->get_capa(hapd->drv_priv, &capa) == 0)
 279                 iface->drv_flags = capa.flags;
 280
 281         return 0;
 282 }
 283
 284
 285 static void hostapd_interface_deinit_free(struct hostapd_iface *iface)
 286 {
 287         const struct wpa_driver_ops *driver;
 288         void *drv_priv;
 289         if (iface == NULL)
 290                 return;
 291         driver = iface->bss[0]->driver;
 292         drv_priv = iface->bss[0]->drv_priv;
 293         hostapd_interface_deinit(iface);
 294         if (driver && driver->hapd_deinit)
 295                 driver->hapd_deinit(drv_priv);
 296         hostapd_interface_free(iface);
 297 }
 298
 299
 300 static struct hostapd_iface *
 301 hostapd_interface_init(struct hapd_interfaces *interfaces,
 302                        const char *config_fname, int debug)
 303 {
 304         struct hostapd_iface *iface;
 305         int k;
 306
 307         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 308         iface = hostapd_init(config_fname);
 309         if (!iface)
 310                 return NULL;
 311         iface->interfaces = interfaces;
 312
 313         for (k = 0; k < debug; k++) {
 314                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 315                         iface->bss[0]->conf->logger_stdout_level--;
 316         }
 317
 318         if (hostapd_driver_init(iface) ||
 319             hostapd_setup_interface(iface)) {
 320                 hostapd_interface_deinit_free(iface);
 321                 return NULL;
 322         }
 323
 324         return iface;
 325 }
 326
 327
 328 /**
 329  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 330  */
 331 static void handle_term(int sig, void *signal_ctx)
 332 {
 333         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 334         eloop_terminate();
 335 }
 336
 337
 338 #ifndef CONFIG_NATIVE_WINDOWS
 339
 340 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 341 {
 342         if (hostapd_reload_config(iface) < 0) {
 343                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 344                            "file - continuing with old.");
 345         }
 346         return 0;
 347 }
 348
 349
 350 /**
 351  * handle_reload - SIGHUP handler to reload configuration
 352  */
 353 static void handle_reload(int sig, void *signal_ctx)
 354 {
 355         struct hapd_interfaces *interfaces = signal_ctx;
 356         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 357                    sig);
 358         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 359 }
 360
 361
 362 static void handle_dump_state(int sig, void *signal_ctx)
 363 {
 364 #ifdef HOSTAPD_DUMP_STATE
 365         struct hapd_interfaces *interfaces = signal_ctx;
 366         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 367 #endif /* HOSTAPD_DUMP_STATE */
 368 }
 369 #endif /* CONFIG_NATIVE_WINDOWS */
 370
 371
 372 static int hostapd_global_init(struct hapd_interfaces *interfaces,
 373                                const char *entropy_file)
 374 {
 375         hostapd_logger_register_cb(hostapd_logger_cb);
 376
 377         if (eap_server_register_methods()) {
 378                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 379                 return -1;
 380         }
 381
 382         if (eloop_init()) {
 383                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 384                 return -1;
 385         }
 386
 387         random_init(entropy_file);
 388
 389 #ifndef CONFIG_NATIVE_WINDOWS
 390         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 391         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 392 #endif /* CONFIG_NATIVE_WINDOWS */
 393         eloop_register_signal_terminate(handle_term, interfaces);
 394
 395 #ifndef CONFIG_NATIVE_WINDOWS
 396         openlog("hostapd", 0, LOG_DAEMON);
 397 #endif /* CONFIG_NATIVE_WINDOWS */
 398
 399         return 0;
 400 }
 401
 402
 403 static void hostapd_global_deinit(const char *pid_file)
 404 {
 405 #ifdef EAP_SERVER_TNC
 406         tncs_global_deinit();
 407 #endif /* EAP_SERVER_TNC */
 408
 409         random_deinit();
 410
 411         eloop_destroy();
 412
 413 #ifndef CONFIG_NATIVE_WINDOWS
 414         closelog();
 415 #endif /* CONFIG_NATIVE_WINDOWS */
 416
 417         eap_server_unregister_methods();
 418
 419         os_daemonize_terminate(pid_file);
 420 }
 421
 422
 423 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 424                               const char *pid_file)
 425 {
 426 #ifdef EAP_SERVER_TNC
 427         int tnc = 0;
 428         size_t i, k;
 429
 430         for (i = 0; !tnc && i < ifaces->count; i++) {
 431                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 432                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 433                                 tnc++;
 434                                 break;
 435                         }
 436                 }
 437         }
 438
 439         if (tnc && tncs_global_init() < 0) {
 440                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 441                 return -1;
 442         }
 443 #endif /* EAP_SERVER_TNC */
 444
 445         if (daemonize && os_daemonize(pid_file)) {
 446                 perror("daemon");
 447                 return -1;
 448         }
 449
 450         eloop_run();
 451
 452         return 0;
 453 }
 454
 455
 456 static void show_version(void)
 457 {
 458         fprintf(stderr,
 459                 "hostapd v" VERSION_STR "\n"
 460                 "User space daemon for IEEE 802.11 AP management,\n"
 461                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 462                 "Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> "
 463                 "and contributors\n");
 464 }
 465
 466
 467 static void usage(void)
 468 {
 469         show_version();
 470         fprintf(stderr,
 471                 "\n"
 472                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 473                 "<configuration file(s)>\n"
 474                 "\n"
 475                 "options:\n"
 476                 "   -h   show this usage\n"
 477                 "   -d   show more debug messages (-dd for even more)\n"
 478                 "   -B   run daemon in the background\n"
 479                 "   -e   entropy file\n"
 480                 "   -P   PID file\n"
 481                 "   -K   include key data in debug messages\n"
 482 #ifdef CONFIG_DEBUG_FILE
 483                 "   -f   log output to debug file instead of stdout\n"
 484 #endif /* CONFIG_DEBUG_FILE */
 485                 "   -t   include timestamps in some debug messages\n"
 486                 "   -v   show hostapd version\n");
 487
 488         exit(1);
 489 }
 490
 491
 492 static const char * hostapd_msg_ifname_cb(void *ctx)
 493 {
 494         struct hostapd_data *hapd = ctx;
 495         if (hapd && hapd->iconf && hapd->iconf->bss)
 496                 return hapd->iconf->bss->iface;
 497         return NULL;
 498 }
 499
 500
 501 int main(int argc, char *argv[])
 502 {
 503         struct hapd_interfaces interfaces;
 504         int ret = 1;
 505         size_t i;
 506         int c, debug = 0, daemonize = 0;
 507         char *pid_file = NULL;
 508         const char *log_file = NULL;
 509         const char *entropy_file = NULL;
 510
 511         if (os_program_init())
 512                 return -1;
 513
 514         for (;;) {
 515                 c = getopt(argc, argv, "Bde:f:hKP:tv");
 516                 if (c < 0)
 517                         break;
 518                 switch (c) {
 519                 case 'h':
 520                         usage();
 521                         break;
 522                 case 'd':
 523                         debug++;
 524                         if (wpa_debug_level > 0)
 525                                 wpa_debug_level--;
 526                         break;
 527                 case 'B':
 528                         daemonize++;
 529                         break;
 530                 case 'e':
 531                         entropy_file = optarg;
 532                         break;
 533                 case 'f':
 534                         log_file = optarg;
 535                         break;
 536                 case 'K':
 537                         wpa_debug_show_keys++;
 538                         break;
 539                 case 'P':
 540                         os_free(pid_file);
 541                         pid_file = os_rel2abs_path(optarg);
 542                         break;
 543                 case 't':
 544                         wpa_debug_timestamp++;
 545                         break;
 546                 case 'v':
 547                         show_version();
 548                         exit(1);
 549                         break;
 550
 551                 default:
 552                         usage();
 553                         break;
 554                 }
 555         }
 556
 557         if (optind == argc)
 558                 usage();
 559
 560         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 561
 562         if (log_file)
 563                 wpa_debug_open_file(log_file);
 564
 565         interfaces.count = argc - optind;
 566         interfaces.iface = os_zalloc(interfaces.count *
 567                                      sizeof(struct hostapd_iface *));
 568         if (interfaces.iface == NULL) {
 569                 wpa_printf(MSG_ERROR, "malloc failed");
 570                 return -1;
 571         }
 572
 573         if (hostapd_global_init(&interfaces, entropy_file))
 574                 return -1;
 575
 576         /* Initialize interfaces */
 577         for (i = 0; i < interfaces.count; i++) {
 578                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 579                                                              argv[optind + i],
 580                                                              debug);
 581                 if (!interfaces.iface[i])
 582                         goto out;
 583         }
 584
 585         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 586                 goto out;
 587
 588         ret = 0;
 589
 590  out:
 591         /* Deinitialize all interfaces */
 592         for (i = 0; i < interfaces.count; i++)
 593                 hostapd_interface_deinit_free(interfaces.iface[i]);
 594         os_free(interfaces.iface);
 595
 596         hostapd_global_deinit(pid_file);
 597         os_free(pid_file);
 598
 599         if (log_file)
 600                 wpa_debug_close_file();
 601
 602         os_program_deinit();
 603
 604         return ret;
 605 }