hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10 #ifndef CONFIG_NATIVE_WINDOWS
  11 #include <syslog.h>
  12 #endif /* CONFIG_NATIVE_WINDOWS */
  13
  14 #include "utils/common.h"
  15 #include "utils/eloop.h"
  16 #include "crypto/random.h"
  17 #include "crypto/tls.h"
  18 #include "common/version.h"
  19 #include "drivers/driver.h"
  20 #include "eap_server/eap.h"
  21 #include "eap_server/tncs.h"
  22 #include "ap/hostapd.h"
  23 #include "ap/ap_config.h"
  24 #include "ap/ap_drv_ops.h"
  25 #include "config_file.h"
  26 #include "eap_register.h"
  27 #include "dump_state.h"
  28 #include "ctrl_iface.h"
  29
  30
  31 extern int wpa_debug_level;
  32 extern int wpa_debug_show_keys;
  33 extern int wpa_debug_timestamp;
  34
  35 extern struct wpa_driver_ops *wpa_drivers[];
  36
  37
  38 struct hapd_global {
  39         void **drv_priv;
  40         size_t drv_count;
  41 };
  42
  43 static struct hapd_global global;
  44
  45
  46 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  47 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  48                               int level, const char *txt, size_t len)
  49 {
  50         struct hostapd_data *hapd = ctx;
  51         char *format, *module_str;
  52         int maxlen;
  53         int conf_syslog_level, conf_stdout_level;
  54         unsigned int conf_syslog, conf_stdout;
  55
  56         maxlen = len + 100;
  57         format = os_malloc(maxlen);
  58         if (!format)
  59                 return;
  60
  61         if (hapd && hapd->conf) {
  62                 conf_syslog_level = hapd->conf->logger_syslog_level;
  63                 conf_stdout_level = hapd->conf->logger_stdout_level;
  64                 conf_syslog = hapd->conf->logger_syslog;
  65                 conf_stdout = hapd->conf->logger_stdout;
  66         } else {
  67                 conf_syslog_level = conf_stdout_level = 0;
  68                 conf_syslog = conf_stdout = (unsigned int) -1;
  69         }
  70
  71         switch (module) {
  72         case HOSTAPD_MODULE_IEEE80211:
  73                 module_str = "IEEE 802.11";
  74                 break;
  75         case HOSTAPD_MODULE_IEEE8021X:
  76                 module_str = "IEEE 802.1X";
  77                 break;
  78         case HOSTAPD_MODULE_RADIUS:
  79                 module_str = "RADIUS";
  80                 break;
  81         case HOSTAPD_MODULE_WPA:
  82                 module_str = "WPA";
  83                 break;
  84         case HOSTAPD_MODULE_DRIVER:
  85                 module_str = "DRIVER";
  86                 break;
  87         case HOSTAPD_MODULE_IAPP:
  88                 module_str = "IAPP";
  89                 break;
  90         case HOSTAPD_MODULE_MLME:
  91                 module_str = "MLME";
  92                 break;
  93         default:
  94                 module_str = NULL;
  95                 break;
  96         }
  97
  98         if (hapd && hapd->conf && addr)
  99                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 100                             hapd->conf->iface, MAC2STR(addr),
 101                             module_str ? " " : "", module_str, txt);
 102         else if (hapd && hapd->conf)
 103                 os_snprintf(format, maxlen, "%s:%s%s %s",
 104                             hapd->conf->iface, module_str ? " " : "",
 105                             module_str, txt);
 106         else if (addr)
 107                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 108                             MAC2STR(addr), module_str ? " " : "",
 109                             module_str, txt);
 110         else
 111                 os_snprintf(format, maxlen, "%s%s%s",
 112                             module_str, module_str ? ": " : "", txt);
 113
 114         if ((conf_stdout & module) && level >= conf_stdout_level) {
 115                 wpa_debug_print_timestamp();
 116                 printf("%s\n", format);
 117         }
 118
 119 #ifndef CONFIG_NATIVE_WINDOWS
 120         if ((conf_syslog & module) && level >= conf_syslog_level) {
 121                 int priority;
 122                 switch (level) {
 123                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 124                 case HOSTAPD_LEVEL_DEBUG:
 125                         priority = LOG_DEBUG;
 126                         break;
 127                 case HOSTAPD_LEVEL_INFO:
 128                         priority = LOG_INFO;
 129                         break;
 130                 case HOSTAPD_LEVEL_NOTICE:
 131                         priority = LOG_NOTICE;
 132                         break;
 133                 case HOSTAPD_LEVEL_WARNING:
 134                         priority = LOG_WARNING;
 135                         break;
 136                 default:
 137                         priority = LOG_INFO;
 138                         break;
 139                 }
 140                 syslog(priority, "%s", format);
 141         }
 142 #endif /* CONFIG_NATIVE_WINDOWS */
 143
 144         os_free(format);
 145 }
 146 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 147
 148
 149 /**
 150  * hostapd_init - Allocate and initialize per-interface data
 151  * @config_file: Path to the configuration file
 152  * Returns: Pointer to the allocated interface data or %NULL on failure
 153  *
 154  * This function is used to allocate main data structures for per-interface
 155  * data. The allocated data buffer will be freed by calling
 156  * hostapd_cleanup_iface().
 157  */
 158 static struct hostapd_iface * hostapd_init(const char *config_file)
 159 {
 160         struct hostapd_iface *hapd_iface = NULL;
 161         struct hostapd_config *conf = NULL;
 162         struct hostapd_data *hapd;
 163         size_t i;
 164
 165         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 166         if (hapd_iface == NULL)
 167                 goto fail;
 168
 169         hapd_iface->reload_config = hostapd_reload_config;
 170         hapd_iface->config_read_cb = hostapd_config_read;
 171         hapd_iface->config_fname = os_strdup(config_file);
 172         if (hapd_iface->config_fname == NULL)
 173                 goto fail;
 174         hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
 175         hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 176         hapd_iface->for_each_interface = hostapd_for_each_interface;
 177
 178         conf = hostapd_config_read(hapd_iface->config_fname);
 179         if (conf == NULL)
 180                 goto fail;
 181         hapd_iface->conf = conf;
 182
 183         hapd_iface->num_bss = conf->num_bss;
 184         hapd_iface->bss = os_zalloc(conf->num_bss *
 185                                     sizeof(struct hostapd_data *));
 186         if (hapd_iface->bss == NULL)
 187                 goto fail;
 188
 189         for (i = 0; i < conf->num_bss; i++) {
 190                 hapd = hapd_iface->bss[i] =
 191                         hostapd_alloc_bss_data(hapd_iface, conf,
 192                                                &conf->bss[i]);
 193                 if (hapd == NULL)
 194                         goto fail;
 195                 hapd->msg_ctx = hapd;
 196         }
 197
 198         return hapd_iface;
 199
 200 fail:
 201         if (conf)
 202                 hostapd_config_free(conf);
 203         if (hapd_iface) {
 204                 os_free(hapd_iface->config_fname);
 205                 os_free(hapd_iface->bss);
 206                 os_free(hapd_iface);
 207         }
 208         return NULL;
 209 }
 210
 211
 212 static int hostapd_driver_init(struct hostapd_iface *iface)
 213 {
 214         struct wpa_init_params params;
 215         size_t i;
 216         struct hostapd_data *hapd = iface->bss[0];
 217         struct hostapd_bss_config *conf = hapd->conf;
 218         u8 *b = conf->bssid;
 219         struct wpa_driver_capa capa;
 220
 221         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 222                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 223                 return -1;
 224         }
 225
 226         /* Initialize the driver interface */
 227         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 228                 b = NULL;
 229
 230         os_memset(&params, 0, sizeof(params));
 231         for (i = 0; wpa_drivers[i]; i++) {
 232                 if (wpa_drivers[i] != hapd->driver)
 233                         continue;
 234
 235                 if (global.drv_priv[i] == NULL &&
 236                     wpa_drivers[i]->global_init) {
 237                         global.drv_priv[i] = wpa_drivers[i]->global_init();
 238                         if (global.drv_priv[i] == NULL) {
 239                                 wpa_printf(MSG_ERROR, "Failed to initialize "
 240                                            "driver '%s'",
 241                                            wpa_drivers[i]->name);
 242                                 return -1;
 243                         }
 244                 }
 245
 246                 params.global_priv = global.drv_priv[i];
 247                 break;
 248         }
 249         params.bssid = b;
 250         params.ifname = hapd->conf->iface;
 251         params.ssid = 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                 iface->probe_resp_offloads = capa.probe_resp_offloads;
 281         }
 282
 283         return 0;
 284 }
 285
 286
 287 static void hostapd_interface_deinit_free(struct hostapd_iface *iface)
 288 {
 289         const struct wpa_driver_ops *driver;
 290         void *drv_priv;
 291         if (iface == NULL)
 292                 return;
 293         driver = iface->bss[0]->driver;
 294         drv_priv = iface->bss[0]->drv_priv;
 295         hostapd_interface_deinit(iface);
 296         if (driver && driver->hapd_deinit && drv_priv)
 297                 driver->hapd_deinit(drv_priv);
 298         hostapd_interface_free(iface);
 299 }
 300
 301
 302 static struct hostapd_iface *
 303 hostapd_interface_init(struct hapd_interfaces *interfaces,
 304                        const char *config_fname, int debug)
 305 {
 306         struct hostapd_iface *iface;
 307         int k;
 308
 309         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 310         iface = hostapd_init(config_fname);
 311         if (!iface)
 312                 return NULL;
 313         iface->interfaces = interfaces;
 314
 315         for (k = 0; k < debug; k++) {
 316                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 317                         iface->bss[0]->conf->logger_stdout_level--;
 318         }
 319
 320         if (iface->conf->bss[0].iface[0] != 0 ||
 321             hostapd_drv_none(iface->bss[0])) {
 322                 if (hostapd_driver_init(iface) ||
 323                         hostapd_setup_interface(iface)) {
 324                         hostapd_interface_deinit_free(iface);
 325                         return NULL;
 326                 }
 327         }
 328
 329         return iface;
 330 }
 331
 332
 333 /**
 334  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 335  */
 336 static void handle_term(int sig, void *signal_ctx)
 337 {
 338         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 339         eloop_terminate();
 340 }
 341
 342
 343 #ifndef CONFIG_NATIVE_WINDOWS
 344
 345 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 346 {
 347         if (hostapd_reload_config(iface) < 0) {
 348                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 349                            "file - continuing with old.");
 350         }
 351         return 0;
 352 }
 353
 354
 355 /**
 356  * handle_reload - SIGHUP handler to reload configuration
 357  */
 358 static void handle_reload(int sig, void *signal_ctx)
 359 {
 360         struct hapd_interfaces *interfaces = signal_ctx;
 361         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 362                    sig);
 363         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 364 }
 365
 366
 367 static void handle_dump_state(int sig, void *signal_ctx)
 368 {
 369 #ifdef HOSTAPD_DUMP_STATE
 370         struct hapd_interfaces *interfaces = signal_ctx;
 371         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 372 #endif /* HOSTAPD_DUMP_STATE */
 373 }
 374 #endif /* CONFIG_NATIVE_WINDOWS */
 375
 376
 377 static int hostapd_global_init(struct hapd_interfaces *interfaces,
 378                                const char *entropy_file)
 379 {
 380         int i;
 381
 382         os_memset(&global, 0, sizeof(global));
 383
 384         hostapd_logger_register_cb(hostapd_logger_cb);
 385
 386         if (eap_server_register_methods()) {
 387                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 388                 return -1;
 389         }
 390
 391         if (eloop_init()) {
 392                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 393                 return -1;
 394         }
 395
 396         random_init(entropy_file);
 397
 398 #ifndef CONFIG_NATIVE_WINDOWS
 399         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 400         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 401 #endif /* CONFIG_NATIVE_WINDOWS */
 402         eloop_register_signal_terminate(handle_term, interfaces);
 403
 404 #ifndef CONFIG_NATIVE_WINDOWS
 405         openlog("hostapd", 0, LOG_DAEMON);
 406 #endif /* CONFIG_NATIVE_WINDOWS */
 407
 408         for (i = 0; wpa_drivers[i]; i++)
 409                 global.drv_count++;
 410         if (global.drv_count == 0) {
 411                 wpa_printf(MSG_ERROR, "No drivers enabled");
 412                 return -1;
 413         }
 414         global.drv_priv = os_zalloc(global.drv_count * sizeof(void *));
 415         if (global.drv_priv == NULL)
 416                 return -1;
 417
 418         return 0;
 419 }
 420
 421
 422 static void hostapd_global_deinit(const char *pid_file)
 423 {
 424         int i;
 425
 426         for (i = 0; wpa_drivers[i] && global.drv_priv; i++) {
 427                 if (!global.drv_priv[i])
 428                         continue;
 429                 wpa_drivers[i]->global_deinit(global.drv_priv[i]);
 430         }
 431         os_free(global.drv_priv);
 432         global.drv_priv = NULL;
 433
 434 #ifdef EAP_SERVER_TNC
 435         tncs_global_deinit();
 436 #endif /* EAP_SERVER_TNC */
 437
 438         random_deinit();
 439
 440         eloop_destroy();
 441
 442 #ifndef CONFIG_NATIVE_WINDOWS
 443         closelog();
 444 #endif /* CONFIG_NATIVE_WINDOWS */
 445
 446         eap_server_unregister_methods();
 447
 448         os_daemonize_terminate(pid_file);
 449 }
 450
 451
 452 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 453                               const char *pid_file)
 454 {
 455 #ifdef EAP_SERVER_TNC
 456         int tnc = 0;
 457         size_t i, k;
 458
 459         for (i = 0; !tnc && i < ifaces->count; i++) {
 460                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 461                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 462                                 tnc++;
 463                                 break;
 464                         }
 465                 }
 466         }
 467
 468         if (tnc && tncs_global_init() < 0) {
 469                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 470                 return -1;
 471         }
 472 #endif /* EAP_SERVER_TNC */
 473
 474         if (daemonize && os_daemonize(pid_file)) {
 475                 perror("daemon");
 476                 return -1;
 477         }
 478
 479         eloop_run();
 480
 481         return 0;
 482 }
 483
 484
 485 static void show_version(void)
 486 {
 487         fprintf(stderr,
 488                 "hostapd v" VERSION_STR "\n"
 489                 "User space daemon for IEEE 802.11 AP management,\n"
 490                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 491                 "Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi> "
 492                 "and contributors\n");
 493 }
 494
 495
 496 static void usage(void)
 497 {
 498         show_version();
 499         fprintf(stderr,
 500                 "\n"
 501                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 502                 "<configuration file(s)>\n"
 503                 "\n"
 504                 "options:\n"
 505                 "   -h   show this usage\n"
 506                 "   -d   show more debug messages (-dd for even more)\n"
 507                 "   -B   run daemon in the background\n"
 508                 "   -e   entropy file\n"
 509                 "   -P   PID file\n"
 510                 "   -K   include key data in debug messages\n"
 511 #ifdef CONFIG_DEBUG_FILE
 512                 "   -f   log output to debug file instead of stdout\n"
 513 #endif /* CONFIG_DEBUG_FILE */
 514                 "   -t   include timestamps in some debug messages\n"
 515                 "   -v   show hostapd version\n");
 516
 517         exit(1);
 518 }
 519
 520
 521 static const char * hostapd_msg_ifname_cb(void *ctx)
 522 {
 523         struct hostapd_data *hapd = ctx;
 524         if (hapd && hapd->iconf && hapd->iconf->bss)
 525                 return hapd->iconf->bss->iface;
 526         return NULL;
 527 }
 528
 529
 530 int main(int argc, char *argv[])
 531 {
 532         struct hapd_interfaces interfaces;
 533         int ret = 1;
 534         size_t i;
 535         int c, debug = 0, daemonize = 0;
 536         char *pid_file = NULL;
 537         const char *log_file = NULL;
 538         const char *entropy_file = NULL;
 539
 540         if (os_program_init())
 541                 return -1;
 542
 543         for (;;) {
 544                 c = getopt(argc, argv, "Bde:f:hKP:tv");
 545                 if (c < 0)
 546                         break;
 547                 switch (c) {
 548                 case 'h':
 549                         usage();
 550                         break;
 551                 case 'd':
 552                         debug++;
 553                         if (wpa_debug_level > 0)
 554                                 wpa_debug_level--;
 555                         break;
 556                 case 'B':
 557                         daemonize++;
 558                         break;
 559                 case 'e':
 560                         entropy_file = optarg;
 561                         break;
 562                 case 'f':
 563                         log_file = optarg;
 564                         break;
 565                 case 'K':
 566                         wpa_debug_show_keys++;
 567                         break;
 568                 case 'P':
 569                         os_free(pid_file);
 570                         pid_file = os_rel2abs_path(optarg);
 571                         break;
 572                 case 't':
 573                         wpa_debug_timestamp++;
 574                         break;
 575                 case 'v':
 576                         show_version();
 577                         exit(1);
 578                         break;
 579
 580                 default:
 581                         usage();
 582                         break;
 583                 }
 584         }
 585
 586         if (optind == argc)
 587                 usage();
 588
 589         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 590
 591         if (log_file)
 592                 wpa_debug_open_file(log_file);
 593
 594         interfaces.count = argc - optind;
 595         interfaces.iface = os_zalloc(interfaces.count *
 596                                      sizeof(struct hostapd_iface *));
 597         if (interfaces.iface == NULL) {
 598                 wpa_printf(MSG_ERROR, "malloc failed");
 599                 return -1;
 600         }
 601
 602         if (hostapd_global_init(&interfaces, entropy_file))
 603                 return -1;
 604
 605         /* Initialize interfaces */
 606         for (i = 0; i < interfaces.count; i++) {
 607                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 608                                                              argv[optind + i],
 609                                                              debug);
 610                 if (!interfaces.iface[i])
 611                         goto out;
 612         }
 613
 614         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 615                 goto out;
 616
 617         ret = 0;
 618
 619  out:
 620         /* Deinitialize all interfaces */
 621         for (i = 0; i < interfaces.count; i++)
 622                 hostapd_interface_deinit_free(interfaces.iface[i]);
 623         os_free(interfaces.iface);
 624
 625         hostapd_global_deinit(pid_file);
 626         os_free(pid_file);
 627
 628         if (log_file)
 629                 wpa_debug_close_file();
 630
 631         os_program_deinit();
 632
 633         return ret;
 634 }