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->config_fname = os_strdup(config_file);
 170         if (hapd_iface->config_fname == NULL)
 171                 goto fail;
 172
 173         conf = hostapd_config_read(hapd_iface->config_fname);
 174         if (conf == NULL)
 175                 goto fail;
 176         hapd_iface->conf = conf;
 177
 178         hapd_iface->num_bss = conf->num_bss;
 179         hapd_iface->bss = os_calloc(conf->num_bss,
 180                                     sizeof(struct hostapd_data *));
 181         if (hapd_iface->bss == NULL)
 182                 goto fail;
 183
 184         for (i = 0; i < conf->num_bss; i++) {
 185                 hapd = hapd_iface->bss[i] =
 186                         hostapd_alloc_bss_data(hapd_iface, conf,
 187                                                &conf->bss[i]);
 188                 if (hapd == NULL)
 189                         goto fail;
 190                 hapd->msg_ctx = hapd;
 191         }
 192
 193         return hapd_iface;
 194
 195 fail:
 196         if (conf)
 197                 hostapd_config_free(conf);
 198         if (hapd_iface) {
 199                 os_free(hapd_iface->config_fname);
 200                 os_free(hapd_iface->bss);
 201                 os_free(hapd_iface);
 202         }
 203         return NULL;
 204 }
 205
 206
 207 static int hostapd_driver_init(struct hostapd_iface *iface)
 208 {
 209         struct wpa_init_params params;
 210         size_t i;
 211         struct hostapd_data *hapd = iface->bss[0];
 212         struct hostapd_bss_config *conf = hapd->conf;
 213         u8 *b = conf->bssid;
 214         struct wpa_driver_capa capa;
 215
 216         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 217                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 218                 return -1;
 219         }
 220
 221         /* Initialize the driver interface */
 222         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 223                 b = NULL;
 224
 225         os_memset(&params, 0, sizeof(params));
 226         for (i = 0; wpa_drivers[i]; i++) {
 227                 if (wpa_drivers[i] != hapd->driver)
 228                         continue;
 229
 230                 if (global.drv_priv[i] == NULL &&
 231                     wpa_drivers[i]->global_init) {
 232                         global.drv_priv[i] = wpa_drivers[i]->global_init();
 233                         if (global.drv_priv[i] == NULL) {
 234                                 wpa_printf(MSG_ERROR, "Failed to initialize "
 235                                            "driver '%s'",
 236                                            wpa_drivers[i]->name);
 237                                 return -1;
 238                         }
 239                 }
 240
 241                 params.global_priv = global.drv_priv[i];
 242                 break;
 243         }
 244         params.bssid = b;
 245         params.ifname = hapd->conf->iface;
 246         params.ssid = hapd->conf->ssid.ssid;
 247         params.ssid_len = hapd->conf->ssid.ssid_len;
 248         params.test_socket = hapd->conf->test_socket;
 249         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 250
 251         params.num_bridge = hapd->iface->num_bss;
 252         params.bridge = os_calloc(hapd->iface->num_bss, sizeof(char *));
 253         if (params.bridge == NULL)
 254                 return -1;
 255         for (i = 0; i < hapd->iface->num_bss; i++) {
 256                 struct hostapd_data *bss = hapd->iface->bss[i];
 257                 if (bss->conf->bridge[0])
 258                         params.bridge[i] = bss->conf->bridge;
 259         }
 260
 261         params.own_addr = hapd->own_addr;
 262
 263         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 264         os_free(params.bridge);
 265         if (hapd->drv_priv == NULL) {
 266                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 267                            hapd->driver->name);
 268                 hapd->driver = NULL;
 269                 return -1;
 270         }
 271
 272         if (hapd->driver->get_capa &&
 273             hapd->driver->get_capa(hapd->drv_priv, &capa) == 0) {
 274                 iface->drv_flags = capa.flags;
 275                 iface->probe_resp_offloads = capa.probe_resp_offloads;
 276         }
 277
 278         return 0;
 279 }
 280
 281
 282 static struct hostapd_iface *
 283 hostapd_interface_init(struct hapd_interfaces *interfaces,
 284                        const char *config_fname, int debug)
 285 {
 286         struct hostapd_iface *iface;
 287         int k;
 288
 289         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 290         iface = hostapd_init(config_fname);
 291         if (!iface)
 292                 return NULL;
 293         iface->interfaces = interfaces;
 294
 295         for (k = 0; k < debug; k++) {
 296                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 297                         iface->bss[0]->conf->logger_stdout_level--;
 298         }
 299
 300         if (iface->conf->bss[0].iface[0] != 0 ||
 301             hostapd_drv_none(iface->bss[0])) {
 302                 if (hostapd_driver_init(iface) ||
 303                         hostapd_setup_interface(iface)) {
 304                         hostapd_interface_deinit_free(iface);
 305                         return NULL;
 306                 }
 307         }
 308
 309         return iface;
 310 }
 311
 312
 313 /**
 314  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 315  */
 316 static void handle_term(int sig, void *signal_ctx)
 317 {
 318         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 319         eloop_terminate();
 320 }
 321
 322
 323 #ifndef CONFIG_NATIVE_WINDOWS
 324
 325 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 326 {
 327         if (hostapd_reload_config(iface) < 0) {
 328                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 329                            "file - continuing with old.");
 330         }
 331         return 0;
 332 }
 333
 334
 335 /**
 336  * handle_reload - SIGHUP handler to reload configuration
 337  */
 338 static void handle_reload(int sig, void *signal_ctx)
 339 {
 340         struct hapd_interfaces *interfaces = signal_ctx;
 341         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 342                    sig);
 343         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 344 }
 345
 346
 347 static void handle_dump_state(int sig, void *signal_ctx)
 348 {
 349 #ifdef HOSTAPD_DUMP_STATE
 350         struct hapd_interfaces *interfaces = signal_ctx;
 351         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 352 #endif /* HOSTAPD_DUMP_STATE */
 353 }
 354 #endif /* CONFIG_NATIVE_WINDOWS */
 355
 356
 357 static int hostapd_global_init(struct hapd_interfaces *interfaces,
 358                                const char *entropy_file)
 359 {
 360         int i;
 361
 362         os_memset(&global, 0, sizeof(global));
 363
 364         hostapd_logger_register_cb(hostapd_logger_cb);
 365
 366         if (eap_server_register_methods()) {
 367                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 368                 return -1;
 369         }
 370
 371         if (eloop_init()) {
 372                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 373                 return -1;
 374         }
 375
 376         random_init(entropy_file);
 377
 378 #ifndef CONFIG_NATIVE_WINDOWS
 379         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 380         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 381 #endif /* CONFIG_NATIVE_WINDOWS */
 382         eloop_register_signal_terminate(handle_term, interfaces);
 383
 384 #ifndef CONFIG_NATIVE_WINDOWS
 385         openlog("hostapd", 0, LOG_DAEMON);
 386 #endif /* CONFIG_NATIVE_WINDOWS */
 387
 388         for (i = 0; wpa_drivers[i]; i++)
 389                 global.drv_count++;
 390         if (global.drv_count == 0) {
 391                 wpa_printf(MSG_ERROR, "No drivers enabled");
 392                 return -1;
 393         }
 394         global.drv_priv = os_calloc(global.drv_count, sizeof(void *));
 395         if (global.drv_priv == NULL)
 396                 return -1;
 397
 398         return 0;
 399 }
 400
 401
 402 static void hostapd_global_deinit(const char *pid_file)
 403 {
 404         int i;
 405
 406         for (i = 0; wpa_drivers[i] && global.drv_priv; i++) {
 407                 if (!global.drv_priv[i])
 408                         continue;
 409                 wpa_drivers[i]->global_deinit(global.drv_priv[i]);
 410         }
 411         os_free(global.drv_priv);
 412         global.drv_priv = NULL;
 413
 414 #ifdef EAP_SERVER_TNC
 415         tncs_global_deinit();
 416 #endif /* EAP_SERVER_TNC */
 417
 418         random_deinit();
 419
 420         eloop_destroy();
 421
 422 #ifndef CONFIG_NATIVE_WINDOWS
 423         closelog();
 424 #endif /* CONFIG_NATIVE_WINDOWS */
 425
 426         eap_server_unregister_methods();
 427
 428         os_daemonize_terminate(pid_file);
 429 }
 430
 431
 432 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 433                               const char *pid_file)
 434 {
 435 #ifdef EAP_SERVER_TNC
 436         int tnc = 0;
 437         size_t i, k;
 438
 439         for (i = 0; !tnc && i < ifaces->count; i++) {
 440                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 441                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 442                                 tnc++;
 443                                 break;
 444                         }
 445                 }
 446         }
 447
 448         if (tnc && tncs_global_init() < 0) {
 449                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 450                 return -1;
 451         }
 452 #endif /* EAP_SERVER_TNC */
 453
 454         if (daemonize && os_daemonize(pid_file)) {
 455                 perror("daemon");
 456                 return -1;
 457         }
 458
 459         eloop_run();
 460
 461         return 0;
 462 }
 463
 464
 465 static void show_version(void)
 466 {
 467         fprintf(stderr,
 468                 "hostapd v" VERSION_STR "\n"
 469                 "User space daemon for IEEE 802.11 AP management,\n"
 470                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 471                 "Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi> "
 472                 "and contributors\n");
 473 }
 474
 475
 476 static void usage(void)
 477 {
 478         show_version();
 479         fprintf(stderr,
 480                 "\n"
 481                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 482                 "\\\n"
 483                 "         [-g <global ctrl_iface>] <configuration file(s)>\n"
 484                 "\n"
 485                 "options:\n"
 486                 "   -h   show this usage\n"
 487                 "   -d   show more debug messages (-dd for even more)\n"
 488                 "   -B   run daemon in the background\n"
 489                 "   -e   entropy file\n"
 490                 "   -g   global control interface path\n"
 491                 "   -P   PID file\n"
 492                 "   -K   include key data in debug messages\n"
 493 #ifdef CONFIG_DEBUG_FILE
 494                 "   -f   log output to debug file instead of stdout\n"
 495 #endif /* CONFIG_DEBUG_FILE */
 496                 "   -t   include timestamps in some debug messages\n"
 497                 "   -v   show hostapd version\n");
 498
 499         exit(1);
 500 }
 501
 502
 503 static const char * hostapd_msg_ifname_cb(void *ctx)
 504 {
 505         struct hostapd_data *hapd = ctx;
 506         if (hapd && hapd->iconf && hapd->iconf->bss)
 507                 return hapd->iconf->bss->iface;
 508         return NULL;
 509 }
 510
 511
 512 static int hostapd_get_global_ctrl_iface(struct hapd_interfaces *interfaces,
 513                                          const char *path)
 514 {
 515         char *pos;
 516         os_free(interfaces->global_iface_path);
 517         interfaces->global_iface_path = os_strdup(path);
 518         if (interfaces->global_iface_path == NULL)
 519                 return -1;
 520         pos = os_strrchr(interfaces->global_iface_path, '/');
 521         if (pos == NULL) {
 522                 os_free(interfaces->global_iface_path);
 523                 interfaces->global_iface_path = NULL;
 524                 return -1;
 525         }
 526
 527         *pos = '\0';
 528         interfaces->global_iface_name = pos + 1;
 529
 530         return 0;
 531 }
 532
 533
 534 int main(int argc, char *argv[])
 535 {
 536         struct hapd_interfaces interfaces;
 537         int ret = 1;
 538         size_t i;
 539         int c, debug = 0, daemonize = 0;
 540         char *pid_file = NULL;
 541         const char *log_file = NULL;
 542         const char *entropy_file = NULL;
 543
 544         if (os_program_init())
 545                 return -1;
 546
 547         os_memset(&interfaces, 0, sizeof(interfaces));
 548         interfaces.reload_config = hostapd_reload_config;
 549         interfaces.config_read_cb = hostapd_config_read;
 550         interfaces.for_each_interface = hostapd_for_each_interface;
 551         interfaces.ctrl_iface_init = hostapd_ctrl_iface_init;
 552         interfaces.ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 553         interfaces.driver_init = hostapd_driver_init;
 554         interfaces.global_iface_path = NULL;
 555         interfaces.global_iface_name = NULL;
 556         interfaces.global_ctrl_sock = -1;
 557
 558         for (;;) {
 559                 c = getopt(argc, argv, "Bde:f:hKP:tvg:");
 560                 if (c < 0)
 561                         break;
 562                 switch (c) {
 563                 case 'h':
 564                         usage();
 565                         break;
 566                 case 'd':
 567                         debug++;
 568                         if (wpa_debug_level > 0)
 569                                 wpa_debug_level--;
 570                         break;
 571                 case 'B':
 572                         daemonize++;
 573                         break;
 574                 case 'e':
 575                         entropy_file = optarg;
 576                         break;
 577                 case 'f':
 578                         log_file = optarg;
 579                         break;
 580                 case 'K':
 581                         wpa_debug_show_keys++;
 582                         break;
 583                 case 'P':
 584                         os_free(pid_file);
 585                         pid_file = os_rel2abs_path(optarg);
 586                         break;
 587                 case 't':
 588                         wpa_debug_timestamp++;
 589                         break;
 590                 case 'v':
 591                         show_version();
 592                         exit(1);
 593                         break;
 594                 case 'g':
 595                         hostapd_get_global_ctrl_iface(&interfaces, optarg);
 596                         break;
 597
 598                 default:
 599                         usage();
 600                         break;
 601                 }
 602         }
 603
 604         if (optind == argc && interfaces.global_iface_path == NULL)
 605                 usage();
 606
 607         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 608
 609         if (log_file)
 610                 wpa_debug_open_file(log_file);
 611
 612         interfaces.count = argc - optind;
 613         if (interfaces.count) {
 614                 interfaces.iface = os_calloc(interfaces.count,
 615                                              sizeof(struct hostapd_iface *));
 616                 if (interfaces.iface == NULL) {
 617                         wpa_printf(MSG_ERROR, "malloc failed");
 618                         return -1;
 619                 }
 620         }
 621
 622         if (hostapd_global_init(&interfaces, entropy_file))
 623                 return -1;
 624
 625         /* Initialize interfaces */
 626         for (i = 0; i < interfaces.count; i++) {
 627                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 628                                                              argv[optind + i],
 629                                                              debug);
 630                 if (!interfaces.iface[i])
 631                         goto out;
 632         }
 633
 634         hostapd_global_ctrl_iface_init(&interfaces);
 635
 636         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 637                 goto out;
 638
 639         ret = 0;
 640
 641  out:
 642         hostapd_global_ctrl_iface_deinit(&interfaces);
 643         /* Deinitialize all interfaces */
 644         for (i = 0; i < interfaces.count; i++)
 645                 hostapd_interface_deinit_free(interfaces.iface[i]);
 646         os_free(interfaces.iface);
 647
 648         hostapd_global_deinit(pid_file);
 649         os_free(pid_file);
 650
 651         if (log_file)
 652                 wpa_debug_close_file();
 653
 654         os_program_deinit();
 655
 656         return ret;
 657 }