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 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
 283 {
 284         const struct wpa_driver_ops *driver;
 285         void *drv_priv;
 286         if (iface == NULL)
 287                 return;
 288         driver = iface->bss[0]->driver;
 289         drv_priv = iface->bss[0]->drv_priv;
 290         hostapd_interface_deinit(iface);
 291         if (driver && driver->hapd_deinit && drv_priv)
 292                 driver->hapd_deinit(drv_priv);
 293         hostapd_interface_free(iface);
 294 }
 295
 296
 297 static struct hostapd_iface *
 298 hostapd_interface_init(struct hapd_interfaces *interfaces,
 299                        const char *config_fname, int debug)
 300 {
 301         struct hostapd_iface *iface;
 302         int k;
 303
 304         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 305         iface = hostapd_init(config_fname);
 306         if (!iface)
 307                 return NULL;
 308         iface->interfaces = interfaces;
 309
 310         for (k = 0; k < debug; k++) {
 311                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 312                         iface->bss[0]->conf->logger_stdout_level--;
 313         }
 314
 315         if (iface->conf->bss[0].iface[0] != 0 ||
 316             hostapd_drv_none(iface->bss[0])) {
 317                 if (hostapd_driver_init(iface) ||
 318                         hostapd_setup_interface(iface)) {
 319                         hostapd_interface_deinit_free(iface);
 320                         return NULL;
 321                 }
 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         int i;
 376
 377         os_memset(&global, 0, sizeof(global));
 378
 379         hostapd_logger_register_cb(hostapd_logger_cb);
 380
 381         if (eap_server_register_methods()) {
 382                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 383                 return -1;
 384         }
 385
 386         if (eloop_init()) {
 387                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 388                 return -1;
 389         }
 390
 391         random_init(entropy_file);
 392
 393 #ifndef CONFIG_NATIVE_WINDOWS
 394         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 395         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 396 #endif /* CONFIG_NATIVE_WINDOWS */
 397         eloop_register_signal_terminate(handle_term, interfaces);
 398
 399 #ifndef CONFIG_NATIVE_WINDOWS
 400         openlog("hostapd", 0, LOG_DAEMON);
 401 #endif /* CONFIG_NATIVE_WINDOWS */
 402
 403         for (i = 0; wpa_drivers[i]; i++)
 404                 global.drv_count++;
 405         if (global.drv_count == 0) {
 406                 wpa_printf(MSG_ERROR, "No drivers enabled");
 407                 return -1;
 408         }
 409         global.drv_priv = os_calloc(global.drv_count, sizeof(void *));
 410         if (global.drv_priv == NULL)
 411                 return -1;
 412
 413         return 0;
 414 }
 415
 416
 417 static void hostapd_global_deinit(const char *pid_file)
 418 {
 419         int i;
 420
 421         for (i = 0; wpa_drivers[i] && global.drv_priv; i++) {
 422                 if (!global.drv_priv[i])
 423                         continue;
 424                 wpa_drivers[i]->global_deinit(global.drv_priv[i]);
 425         }
 426         os_free(global.drv_priv);
 427         global.drv_priv = NULL;
 428
 429 #ifdef EAP_SERVER_TNC
 430         tncs_global_deinit();
 431 #endif /* EAP_SERVER_TNC */
 432
 433         random_deinit();
 434
 435         eloop_destroy();
 436
 437 #ifndef CONFIG_NATIVE_WINDOWS
 438         closelog();
 439 #endif /* CONFIG_NATIVE_WINDOWS */
 440
 441         eap_server_unregister_methods();
 442
 443         os_daemonize_terminate(pid_file);
 444 }
 445
 446
 447 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 448                               const char *pid_file)
 449 {
 450 #ifdef EAP_SERVER_TNC
 451         int tnc = 0;
 452         size_t i, k;
 453
 454         for (i = 0; !tnc && i < ifaces->count; i++) {
 455                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 456                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 457                                 tnc++;
 458                                 break;
 459                         }
 460                 }
 461         }
 462
 463         if (tnc && tncs_global_init() < 0) {
 464                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 465                 return -1;
 466         }
 467 #endif /* EAP_SERVER_TNC */
 468
 469         if (daemonize && os_daemonize(pid_file)) {
 470                 perror("daemon");
 471                 return -1;
 472         }
 473
 474         eloop_run();
 475
 476         return 0;
 477 }
 478
 479
 480 static void show_version(void)
 481 {
 482         fprintf(stderr,
 483                 "hostapd v" VERSION_STR "\n"
 484                 "User space daemon for IEEE 802.11 AP management,\n"
 485                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 486                 "Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi> "
 487                 "and contributors\n");
 488 }
 489
 490
 491 static void usage(void)
 492 {
 493         show_version();
 494         fprintf(stderr,
 495                 "\n"
 496                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 497                 "\\\n"
 498                 "         [-g <global ctrl_iface>] <configuration file(s)>\n"
 499                 "\n"
 500                 "options:\n"
 501                 "   -h   show this usage\n"
 502                 "   -d   show more debug messages (-dd for even more)\n"
 503                 "   -B   run daemon in the background\n"
 504                 "   -e   entropy file\n"
 505                 "   -g   global control interface path\n"
 506                 "   -P   PID file\n"
 507                 "   -K   include key data in debug messages\n"
 508 #ifdef CONFIG_DEBUG_FILE
 509                 "   -f   log output to debug file instead of stdout\n"
 510 #endif /* CONFIG_DEBUG_FILE */
 511                 "   -t   include timestamps in some debug messages\n"
 512                 "   -v   show hostapd version\n");
 513
 514         exit(1);
 515 }
 516
 517
 518 static const char * hostapd_msg_ifname_cb(void *ctx)
 519 {
 520         struct hostapd_data *hapd = ctx;
 521         if (hapd && hapd->iconf && hapd->iconf->bss)
 522                 return hapd->iconf->bss->iface;
 523         return NULL;
 524 }
 525
 526
 527 static int hostapd_get_global_ctrl_iface(struct hapd_interfaces *interfaces,
 528                                          const char *path)
 529 {
 530         char *pos;
 531         os_free(interfaces->global_iface_path);
 532         interfaces->global_iface_path = os_strdup(path);
 533         if (interfaces->global_iface_path == NULL)
 534                 return -1;
 535         pos = os_strrchr(interfaces->global_iface_path, '/');
 536         if (pos == NULL) {
 537                 os_free(interfaces->global_iface_path);
 538                 interfaces->global_iface_path = NULL;
 539                 return -1;
 540         }
 541
 542         *pos = '\0';
 543         interfaces->global_iface_name = pos + 1;
 544
 545         return 0;
 546 }
 547
 548
 549 int main(int argc, char *argv[])
 550 {
 551         struct hapd_interfaces interfaces;
 552         int ret = 1;
 553         size_t i;
 554         int c, debug = 0, daemonize = 0;
 555         char *pid_file = NULL;
 556         const char *log_file = NULL;
 557         const char *entropy_file = NULL;
 558
 559         if (os_program_init())
 560                 return -1;
 561
 562         os_memset(&interfaces, 0, sizeof(interfaces));
 563         interfaces.reload_config = hostapd_reload_config;
 564         interfaces.config_read_cb = hostapd_config_read;
 565         interfaces.for_each_interface = hostapd_for_each_interface;
 566         interfaces.ctrl_iface_init = hostapd_ctrl_iface_init;
 567         interfaces.ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 568         interfaces.global_iface_path = NULL;
 569         interfaces.global_iface_name = NULL;
 570         interfaces.global_ctrl_sock = -1;
 571
 572         for (;;) {
 573                 c = getopt(argc, argv, "Bde:f:hKP:tvg:");
 574                 if (c < 0)
 575                         break;
 576                 switch (c) {
 577                 case 'h':
 578                         usage();
 579                         break;
 580                 case 'd':
 581                         debug++;
 582                         if (wpa_debug_level > 0)
 583                                 wpa_debug_level--;
 584                         break;
 585                 case 'B':
 586                         daemonize++;
 587                         break;
 588                 case 'e':
 589                         entropy_file = optarg;
 590                         break;
 591                 case 'f':
 592                         log_file = optarg;
 593                         break;
 594                 case 'K':
 595                         wpa_debug_show_keys++;
 596                         break;
 597                 case 'P':
 598                         os_free(pid_file);
 599                         pid_file = os_rel2abs_path(optarg);
 600                         break;
 601                 case 't':
 602                         wpa_debug_timestamp++;
 603                         break;
 604                 case 'v':
 605                         show_version();
 606                         exit(1);
 607                         break;
 608                 case 'g':
 609                         hostapd_get_global_ctrl_iface(&interfaces, optarg);
 610                         break;
 611
 612                 default:
 613                         usage();
 614                         break;
 615                 }
 616         }
 617
 618         if (optind == argc)
 619                 usage();
 620
 621         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 622
 623         if (log_file)
 624                 wpa_debug_open_file(log_file);
 625
 626         interfaces.count = argc - optind;
 627         interfaces.iface = os_calloc(interfaces.count,
 628                                      sizeof(struct hostapd_iface *));
 629         if (interfaces.iface == NULL) {
 630                 wpa_printf(MSG_ERROR, "malloc failed");
 631                 return -1;
 632         }
 633
 634         if (hostapd_global_init(&interfaces, entropy_file))
 635                 return -1;
 636
 637         /* Initialize interfaces */
 638         for (i = 0; i < interfaces.count; i++) {
 639                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 640                                                              argv[optind + i],
 641                                                              debug);
 642                 if (!interfaces.iface[i])
 643                         goto out;
 644         }
 645
 646         hostapd_global_ctrl_iface_init(&interfaces);
 647
 648         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 649                 goto out;
 650
 651         ret = 0;
 652
 653  out:
 654         hostapd_global_ctrl_iface_deinit(&interfaces);
 655         /* Deinitialize all interfaces */
 656         for (i = 0; i < interfaces.count; i++)
 657                 hostapd_interface_deinit_free(interfaces.iface[i]);
 658         os_free(interfaces.iface);
 659
 660         hostapd_global_deinit(pid_file);
 661         os_free(pid_file);
 662
 663         if (log_file)
 664                 wpa_debug_close_file();
 665
 666         os_program_deinit();
 667
 668         return ret;
 669 }