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 #include <grp.h>
  13 #endif /* CONFIG_NATIVE_WINDOWS */
  14
  15 #include "utils/common.h"
  16 #include "utils/eloop.h"
  17 #include "crypto/random.h"
  18 #include "crypto/tls.h"
  19 #include "common/version.h"
  20 #include "drivers/driver.h"
  21 #include "eap_server/eap.h"
  22 #include "eap_server/tncs.h"
  23 #include "ap/hostapd.h"
  24 #include "ap/ap_config.h"
  25 #include "ap/ap_drv_ops.h"
  26 #include "config_file.h"
  27 #include "eap_register.h"
  28 #include "dump_state.h"
  29 #include "ctrl_iface.h"
  30
  31
  32 extern int wpa_debug_level;
  33 extern int wpa_debug_show_keys;
  34 extern int wpa_debug_timestamp;
  35
  36 extern struct wpa_driver_ops *wpa_drivers[];
  37
  38
  39 struct hapd_global {
  40         void **drv_priv;
  41         size_t drv_count;
  42 };
  43
  44 static struct hapd_global global;
  45
  46
  47 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  48 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  49                               int level, const char *txt, size_t len)
  50 {
  51         struct hostapd_data *hapd = ctx;
  52         char *format, *module_str;
  53         int maxlen;
  54         int conf_syslog_level, conf_stdout_level;
  55         unsigned int conf_syslog, conf_stdout;
  56
  57         maxlen = len + 100;
  58         format = os_malloc(maxlen);
  59         if (!format)
  60                 return;
  61
  62         if (hapd && hapd->conf) {
  63                 conf_syslog_level = hapd->conf->logger_syslog_level;
  64                 conf_stdout_level = hapd->conf->logger_stdout_level;
  65                 conf_syslog = hapd->conf->logger_syslog;
  66                 conf_stdout = hapd->conf->logger_stdout;
  67         } else {
  68                 conf_syslog_level = conf_stdout_level = 0;
  69                 conf_syslog = conf_stdout = (unsigned int) -1;
  70         }
  71
  72         switch (module) {
  73         case HOSTAPD_MODULE_IEEE80211:
  74                 module_str = "IEEE 802.11";
  75                 break;
  76         case HOSTAPD_MODULE_IEEE8021X:
  77                 module_str = "IEEE 802.1X";
  78                 break;
  79         case HOSTAPD_MODULE_RADIUS:
  80                 module_str = "RADIUS";
  81                 break;
  82         case HOSTAPD_MODULE_WPA:
  83                 module_str = "WPA";
  84                 break;
  85         case HOSTAPD_MODULE_DRIVER:
  86                 module_str = "DRIVER";
  87                 break;
  88         case HOSTAPD_MODULE_IAPP:
  89                 module_str = "IAPP";
  90                 break;
  91         case HOSTAPD_MODULE_MLME:
  92                 module_str = "MLME";
  93                 break;
  94         default:
  95                 module_str = NULL;
  96                 break;
  97         }
  98
  99         if (hapd && hapd->conf && addr)
 100                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 101                             hapd->conf->iface, MAC2STR(addr),
 102                             module_str ? " " : "", module_str, txt);
 103         else if (hapd && hapd->conf)
 104                 os_snprintf(format, maxlen, "%s:%s%s %s",
 105                             hapd->conf->iface, module_str ? " " : "",
 106                             module_str, txt);
 107         else if (addr)
 108                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 109                             MAC2STR(addr), module_str ? " " : "",
 110                             module_str, txt);
 111         else
 112                 os_snprintf(format, maxlen, "%s%s%s",
 113                             module_str, module_str ? ": " : "", txt);
 114
 115         if ((conf_stdout & module) && level >= conf_stdout_level) {
 116                 wpa_debug_print_timestamp();
 117                 printf("%s\n", format);
 118         }
 119
 120 #ifndef CONFIG_NATIVE_WINDOWS
 121         if ((conf_syslog & module) && level >= conf_syslog_level) {
 122                 int priority;
 123                 switch (level) {
 124                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 125                 case HOSTAPD_LEVEL_DEBUG:
 126                         priority = LOG_DEBUG;
 127                         break;
 128                 case HOSTAPD_LEVEL_INFO:
 129                         priority = LOG_INFO;
 130                         break;
 131                 case HOSTAPD_LEVEL_NOTICE:
 132                         priority = LOG_NOTICE;
 133                         break;
 134                 case HOSTAPD_LEVEL_WARNING:
 135                         priority = LOG_WARNING;
 136                         break;
 137                 default:
 138                         priority = LOG_INFO;
 139                         break;
 140                 }
 141                 syslog(priority, "%s", format);
 142         }
 143 #endif /* CONFIG_NATIVE_WINDOWS */
 144
 145         os_free(format);
 146 }
 147 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 148
 149
 150 /**
 151  * hostapd_init - Allocate and initialize per-interface data
 152  * @config_file: Path to the configuration file
 153  * Returns: Pointer to the allocated interface data or %NULL on failure
 154  *
 155  * This function is used to allocate main data structures for per-interface
 156  * data. The allocated data buffer will be freed by calling
 157  * hostapd_cleanup_iface().
 158  */
 159 static struct hostapd_iface * hostapd_init(const char *config_file)
 160 {
 161         struct hostapd_iface *hapd_iface = NULL;
 162         struct hostapd_config *conf = NULL;
 163         struct hostapd_data *hapd;
 164         size_t i;
 165
 166         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 167         if (hapd_iface == NULL)
 168                 goto fail;
 169
 170         hapd_iface->config_fname = os_strdup(config_file);
 171         if (hapd_iface->config_fname == NULL)
 172                 goto fail;
 173
 174         conf = hostapd_config_read(hapd_iface->config_fname);
 175         if (conf == NULL)
 176                 goto fail;
 177         hapd_iface->conf = conf;
 178
 179         hapd_iface->num_bss = conf->num_bss;
 180         hapd_iface->bss = os_calloc(conf->num_bss,
 181                                     sizeof(struct hostapd_data *));
 182         if (hapd_iface->bss == NULL)
 183                 goto fail;
 184
 185         for (i = 0; i < conf->num_bss; i++) {
 186                 hapd = hapd_iface->bss[i] =
 187                         hostapd_alloc_bss_data(hapd_iface, conf,
 188                                                &conf->bss[i]);
 189                 if (hapd == NULL)
 190                         goto fail;
 191                 hapd->msg_ctx = hapd;
 192         }
 193
 194         return hapd_iface;
 195
 196 fail:
 197         if (conf)
 198                 hostapd_config_free(conf);
 199         if (hapd_iface) {
 200                 os_free(hapd_iface->config_fname);
 201                 os_free(hapd_iface->bss);
 202                 os_free(hapd_iface);
 203         }
 204         return NULL;
 205 }
 206
 207
 208 static int hostapd_driver_init(struct hostapd_iface *iface)
 209 {
 210         struct wpa_init_params params;
 211         size_t i;
 212         struct hostapd_data *hapd = iface->bss[0];
 213         struct hostapd_bss_config *conf = hapd->conf;
 214         u8 *b = conf->bssid;
 215         struct wpa_driver_capa capa;
 216
 217         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 218                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 219                 return -1;
 220         }
 221
 222         /* Initialize the driver interface */
 223         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 224                 b = NULL;
 225
 226         os_memset(&params, 0, sizeof(params));
 227         for (i = 0; wpa_drivers[i]; i++) {
 228                 if (wpa_drivers[i] != hapd->driver)
 229                         continue;
 230
 231                 if (global.drv_priv[i] == NULL &&
 232                     wpa_drivers[i]->global_init) {
 233                         global.drv_priv[i] = wpa_drivers[i]->global_init();
 234                         if (global.drv_priv[i] == NULL) {
 235                                 wpa_printf(MSG_ERROR, "Failed to initialize "
 236                                            "driver '%s'",
 237                                            wpa_drivers[i]->name);
 238                                 return -1;
 239                         }
 240                 }
 241
 242                 params.global_priv = global.drv_priv[i];
 243                 break;
 244         }
 245         params.bssid = b;
 246         params.ifname = hapd->conf->iface;
 247         params.ssid = hapd->conf->ssid.ssid;
 248         params.ssid_len = hapd->conf->ssid.ssid_len;
 249         params.test_socket = hapd->conf->test_socket;
 250         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 251
 252         params.num_bridge = hapd->iface->num_bss;
 253         params.bridge = os_calloc(hapd->iface->num_bss, sizeof(char *));
 254         if (params.bridge == NULL)
 255                 return -1;
 256         for (i = 0; i < hapd->iface->num_bss; i++) {
 257                 struct hostapd_data *bss = hapd->iface->bss[i];
 258                 if (bss->conf->bridge[0])
 259                         params.bridge[i] = bss->conf->bridge;
 260         }
 261
 262         params.own_addr = hapd->own_addr;
 263
 264         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 265         os_free(params.bridge);
 266         if (hapd->drv_priv == NULL) {
 267                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 268                            hapd->driver->name);
 269                 hapd->driver = NULL;
 270                 return -1;
 271         }
 272
 273         if (hapd->driver->get_capa &&
 274             hapd->driver->get_capa(hapd->drv_priv, &capa) == 0) {
 275                 iface->drv_flags = capa.flags;
 276                 iface->probe_resp_offloads = capa.probe_resp_offloads;
 277                 iface->extended_capa = capa.extended_capa;
 278                 iface->extended_capa_mask = capa.extended_capa_mask;
 279                 iface->extended_capa_len = capa.extended_capa_len;
 280         }
 281
 282         return 0;
 283 }
 284
 285
 286 static struct hostapd_iface *
 287 hostapd_interface_init(struct hapd_interfaces *interfaces,
 288                        const char *config_fname, int debug)
 289 {
 290         struct hostapd_iface *iface;
 291         int k;
 292
 293         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 294         iface = hostapd_init(config_fname);
 295         if (!iface)
 296                 return NULL;
 297         iface->interfaces = interfaces;
 298
 299         for (k = 0; k < debug; k++) {
 300                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 301                         iface->bss[0]->conf->logger_stdout_level--;
 302         }
 303
 304         if (iface->conf->bss[0].iface[0] != 0 ||
 305             hostapd_drv_none(iface->bss[0])) {
 306                 if (hostapd_driver_init(iface) ||
 307                         hostapd_setup_interface(iface)) {
 308                         hostapd_interface_deinit_free(iface);
 309                         return NULL;
 310                 }
 311         }
 312
 313         return iface;
 314 }
 315
 316
 317 /**
 318  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 319  */
 320 static void handle_term(int sig, void *signal_ctx)
 321 {
 322         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 323         eloop_terminate();
 324 }
 325
 326
 327 #ifndef CONFIG_NATIVE_WINDOWS
 328
 329 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 330 {
 331         if (hostapd_reload_config(iface) < 0) {
 332                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 333                            "file - continuing with old.");
 334         }
 335         return 0;
 336 }
 337
 338
 339 /**
 340  * handle_reload - SIGHUP handler to reload configuration
 341  */
 342 static void handle_reload(int sig, void *signal_ctx)
 343 {
 344         struct hapd_interfaces *interfaces = signal_ctx;
 345         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 346                    sig);
 347         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 348 }
 349
 350
 351 static void handle_dump_state(int sig, void *signal_ctx)
 352 {
 353 #ifdef HOSTAPD_DUMP_STATE
 354         struct hapd_interfaces *interfaces = signal_ctx;
 355         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 356 #endif /* HOSTAPD_DUMP_STATE */
 357 }
 358 #endif /* CONFIG_NATIVE_WINDOWS */
 359
 360
 361 static int hostapd_global_init(struct hapd_interfaces *interfaces,
 362                                const char *entropy_file)
 363 {
 364         int i;
 365
 366         os_memset(&global, 0, sizeof(global));
 367
 368         hostapd_logger_register_cb(hostapd_logger_cb);
 369
 370         if (eap_server_register_methods()) {
 371                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 372                 return -1;
 373         }
 374
 375         if (eloop_init()) {
 376                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 377                 return -1;
 378         }
 379
 380         random_init(entropy_file);
 381
 382 #ifndef CONFIG_NATIVE_WINDOWS
 383         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 384         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 385 #endif /* CONFIG_NATIVE_WINDOWS */
 386         eloop_register_signal_terminate(handle_term, interfaces);
 387
 388 #ifndef CONFIG_NATIVE_WINDOWS
 389         openlog("hostapd", 0, LOG_DAEMON);
 390 #endif /* CONFIG_NATIVE_WINDOWS */
 391
 392         for (i = 0; wpa_drivers[i]; i++)
 393                 global.drv_count++;
 394         if (global.drv_count == 0) {
 395                 wpa_printf(MSG_ERROR, "No drivers enabled");
 396                 return -1;
 397         }
 398         global.drv_priv = os_calloc(global.drv_count, sizeof(void *));
 399         if (global.drv_priv == NULL)
 400                 return -1;
 401
 402         return 0;
 403 }
 404
 405
 406 static void hostapd_global_deinit(const char *pid_file)
 407 {
 408         int i;
 409
 410         for (i = 0; wpa_drivers[i] && global.drv_priv; i++) {
 411                 if (!global.drv_priv[i])
 412                         continue;
 413                 wpa_drivers[i]->global_deinit(global.drv_priv[i]);
 414         }
 415         os_free(global.drv_priv);
 416         global.drv_priv = NULL;
 417
 418 #ifdef EAP_SERVER_TNC
 419         tncs_global_deinit();
 420 #endif /* EAP_SERVER_TNC */
 421
 422         random_deinit();
 423
 424         eloop_destroy();
 425
 426 #ifndef CONFIG_NATIVE_WINDOWS
 427         closelog();
 428 #endif /* CONFIG_NATIVE_WINDOWS */
 429
 430         eap_server_unregister_methods();
 431
 432         os_daemonize_terminate(pid_file);
 433 }
 434
 435
 436 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 437                               const char *pid_file)
 438 {
 439 #ifdef EAP_SERVER_TNC
 440         int tnc = 0;
 441         size_t i, k;
 442
 443         for (i = 0; !tnc && i < ifaces->count; i++) {
 444                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 445                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 446                                 tnc++;
 447                                 break;
 448                         }
 449                 }
 450         }
 451
 452         if (tnc && tncs_global_init() < 0) {
 453                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 454                 return -1;
 455         }
 456 #endif /* EAP_SERVER_TNC */
 457
 458         if (daemonize && os_daemonize(pid_file)) {
 459                 perror("daemon");
 460                 return -1;
 461         }
 462
 463         eloop_run();
 464
 465         return 0;
 466 }
 467
 468
 469 static void show_version(void)
 470 {
 471         fprintf(stderr,
 472                 "hostapd v" VERSION_STR "\n"
 473                 "User space daemon for IEEE 802.11 AP management,\n"
 474                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 475                 "Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi> "
 476                 "and contributors\n");
 477 }
 478
 479
 480 static void usage(void)
 481 {
 482         show_version();
 483         fprintf(stderr,
 484                 "\n"
 485                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 486                 "\\\n"
 487                 "         [-g <global ctrl_iface>] [-G <group>] \\\n"
 488                 "         <configuration file(s)>\n"
 489                 "\n"
 490                 "options:\n"
 491                 "   -h   show this usage\n"
 492                 "   -d   show more debug messages (-dd for even more)\n"
 493                 "   -B   run daemon in the background\n"
 494                 "   -e   entropy file\n"
 495                 "   -g   global control interface path\n"
 496                 "   -G   group for control interfaces\n"
 497                 "   -P   PID file\n"
 498                 "   -K   include key data in debug messages\n"
 499 #ifdef CONFIG_DEBUG_FILE
 500                 "   -f   log output to debug file instead of stdout\n"
 501 #endif /* CONFIG_DEBUG_FILE */
 502                 "   -t   include timestamps in some debug messages\n"
 503                 "   -v   show hostapd version\n");
 504
 505         exit(1);
 506 }
 507
 508
 509 static const char * hostapd_msg_ifname_cb(void *ctx)
 510 {
 511         struct hostapd_data *hapd = ctx;
 512         if (hapd && hapd->iconf && hapd->iconf->bss)
 513                 return hapd->iconf->bss->iface;
 514         return NULL;
 515 }
 516
 517
 518 static int hostapd_get_global_ctrl_iface(struct hapd_interfaces *interfaces,
 519                                          const char *path)
 520 {
 521         char *pos;
 522         os_free(interfaces->global_iface_path);
 523         interfaces->global_iface_path = os_strdup(path);
 524         if (interfaces->global_iface_path == NULL)
 525                 return -1;
 526         pos = os_strrchr(interfaces->global_iface_path, '/');
 527         if (pos == NULL) {
 528                 wpa_printf(MSG_ERROR, "No '/' in the global control interface "
 529                            "file");
 530                 os_free(interfaces->global_iface_path);
 531                 interfaces->global_iface_path = NULL;
 532                 return -1;
 533         }
 534
 535         *pos = '\0';
 536         interfaces->global_iface_name = pos + 1;
 537
 538         return 0;
 539 }
 540
 541
 542 static int hostapd_get_ctrl_iface_group(struct hapd_interfaces *interfaces,
 543                                         const char *group)
 544 {
 545 #ifndef CONFIG_NATIVE_WINDOWS
 546         struct group *grp;
 547         grp = getgrnam(group);
 548         if (grp == NULL) {
 549                 wpa_printf(MSG_ERROR, "Unknown group '%s'", group);
 550                 return -1;
 551         }
 552         interfaces->ctrl_iface_group = grp->gr_gid;
 553 #endif /* CONFIG_NATIVE_WINDOWS */
 554         return 0;
 555 }
 556
 557
 558 int main(int argc, char *argv[])
 559 {
 560         struct hapd_interfaces interfaces;
 561         int ret = 1;
 562         size_t i;
 563         int c, debug = 0, daemonize = 0;
 564         char *pid_file = NULL;
 565         const char *log_file = NULL;
 566         const char *entropy_file = NULL;
 567
 568         if (os_program_init())
 569                 return -1;
 570
 571         os_memset(&interfaces, 0, sizeof(interfaces));
 572         interfaces.reload_config = hostapd_reload_config;
 573         interfaces.config_read_cb = hostapd_config_read;
 574         interfaces.for_each_interface = hostapd_for_each_interface;
 575         interfaces.ctrl_iface_init = hostapd_ctrl_iface_init;
 576         interfaces.ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 577         interfaces.driver_init = hostapd_driver_init;
 578         interfaces.global_iface_path = NULL;
 579         interfaces.global_iface_name = NULL;
 580         interfaces.global_ctrl_sock = -1;
 581
 582         for (;;) {
 583                 c = getopt(argc, argv, "Bde:f:hKP:tvg:G:");
 584                 if (c < 0)
 585                         break;
 586                 switch (c) {
 587                 case 'h':
 588                         usage();
 589                         break;
 590                 case 'd':
 591                         debug++;
 592                         if (wpa_debug_level > 0)
 593                                 wpa_debug_level--;
 594                         break;
 595                 case 'B':
 596                         daemonize++;
 597                         break;
 598                 case 'e':
 599                         entropy_file = optarg;
 600                         break;
 601                 case 'f':
 602                         log_file = optarg;
 603                         break;
 604                 case 'K':
 605                         wpa_debug_show_keys++;
 606                         break;
 607                 case 'P':
 608                         os_free(pid_file);
 609                         pid_file = os_rel2abs_path(optarg);
 610                         break;
 611                 case 't':
 612                         wpa_debug_timestamp++;
 613                         break;
 614                 case 'v':
 615                         show_version();
 616                         exit(1);
 617                         break;
 618                 case 'g':
 619                         if (hostapd_get_global_ctrl_iface(&interfaces, optarg))
 620                                 return -1;
 621                         break;
 622                 case 'G':
 623                         if (hostapd_get_ctrl_iface_group(&interfaces, optarg))
 624                                 return -1;
 625                         break;
 626                 default:
 627                         usage();
 628                         break;
 629                 }
 630         }
 631
 632         if (optind == argc && interfaces.global_iface_path == NULL)
 633                 usage();
 634
 635         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 636
 637         if (log_file)
 638                 wpa_debug_open_file(log_file);
 639
 640         interfaces.count = argc - optind;
 641         if (interfaces.count) {
 642                 interfaces.iface = os_calloc(interfaces.count,
 643                                              sizeof(struct hostapd_iface *));
 644                 if (interfaces.iface == NULL) {
 645                         wpa_printf(MSG_ERROR, "malloc failed");
 646                         return -1;
 647                 }
 648         }
 649
 650         if (hostapd_global_init(&interfaces, entropy_file))
 651                 return -1;
 652
 653         /* Initialize interfaces */
 654         for (i = 0; i < interfaces.count; i++) {
 655                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 656                                                              argv[optind + i],
 657                                                              debug);
 658                 if (!interfaces.iface[i])
 659                         goto out;
 660         }
 661
 662         hostapd_global_ctrl_iface_init(&interfaces);
 663
 664         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 665                 goto out;
 666
 667         ret = 0;
 668
 669  out:
 670         hostapd_global_ctrl_iface_deinit(&interfaces);
 671         /* Deinitialize all interfaces */
 672         for (i = 0; i < interfaces.count; i++)
 673                 hostapd_interface_deinit_free(interfaces.iface[i]);
 674         os_free(interfaces.iface);
 675
 676         hostapd_global_deinit(pid_file);
 677         os_free(pid_file);
 678
 679         if (log_file)
 680                 wpa_debug_close_file();
 681
 682         os_program_deinit();
 683
 684         return ret;
 685 }