hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16 #ifndef CONFIG_NATIVE_WINDOWS
  17 #include <syslog.h>
  18 #endif /* CONFIG_NATIVE_WINDOWS */
  19
  20 #include "utils/common.h"
  21 #include "utils/eloop.h"
  22 #include "crypto/tls.h"
  23 #include "common/version.h"
  24 #include "drivers/driver.h"
  25 #include "eap_server/eap.h"
  26 #include "eap_server/tncs.h"
  27 #include "ap/hostapd.h"
  28 #include "ap/ap_config.h"
  29 #include "config_file.h"
  30 #include "eap_register.h"
  31 #include "dump_state.h"
  32 #include "ctrl_iface.h"
  33
  34
  35 extern int wpa_debug_level;
  36 extern int wpa_debug_show_keys;
  37 extern int wpa_debug_timestamp;
  38
  39
  40 struct hapd_interfaces {
  41         size_t count;
  42         struct hostapd_iface **iface;
  43 };
  44
  45
  46 static int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  47                                       int (*cb)(struct hostapd_iface *iface,
  48                                                 void *ctx), void *ctx)
  49 {
  50         size_t i;
  51         int ret;
  52
  53         for (i = 0; i < interfaces->count; i++) {
  54                 ret = cb(interfaces->iface[i], ctx);
  55                 if (ret)
  56                         return ret;
  57         }
  58
  59         return 0;
  60 }
  61
  62
  63 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  64 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  65                               int level, const char *txt, size_t len)
  66 {
  67         struct hostapd_data *hapd = ctx;
  68         char *format, *module_str;
  69         int maxlen;
  70         int conf_syslog_level, conf_stdout_level;
  71         unsigned int conf_syslog, conf_stdout;
  72
  73         maxlen = len + 100;
  74         format = os_malloc(maxlen);
  75         if (!format)
  76                 return;
  77
  78         if (hapd && hapd->conf) {
  79                 conf_syslog_level = hapd->conf->logger_syslog_level;
  80                 conf_stdout_level = hapd->conf->logger_stdout_level;
  81                 conf_syslog = hapd->conf->logger_syslog;
  82                 conf_stdout = hapd->conf->logger_stdout;
  83         } else {
  84                 conf_syslog_level = conf_stdout_level = 0;
  85                 conf_syslog = conf_stdout = (unsigned int) -1;
  86         }
  87
  88         switch (module) {
  89         case HOSTAPD_MODULE_IEEE80211:
  90                 module_str = "IEEE 802.11";
  91                 break;
  92         case HOSTAPD_MODULE_IEEE8021X:
  93                 module_str = "IEEE 802.1X";
  94                 break;
  95         case HOSTAPD_MODULE_RADIUS:
  96                 module_str = "RADIUS";
  97                 break;
  98         case HOSTAPD_MODULE_WPA:
  99                 module_str = "WPA";
 100                 break;
 101         case HOSTAPD_MODULE_DRIVER:
 102                 module_str = "DRIVER";
 103                 break;
 104         case HOSTAPD_MODULE_IAPP:
 105                 module_str = "IAPP";
 106                 break;
 107         case HOSTAPD_MODULE_MLME:
 108                 module_str = "MLME";
 109                 break;
 110         default:
 111                 module_str = NULL;
 112                 break;
 113         }
 114
 115         if (hapd && hapd->conf && addr)
 116                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 117                             hapd->conf->iface, MAC2STR(addr),
 118                             module_str ? " " : "", module_str, txt);
 119         else if (hapd && hapd->conf)
 120                 os_snprintf(format, maxlen, "%s:%s%s %s",
 121                             hapd->conf->iface, module_str ? " " : "",
 122                             module_str, txt);
 123         else if (addr)
 124                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 125                             MAC2STR(addr), module_str ? " " : "",
 126                             module_str, txt);
 127         else
 128                 os_snprintf(format, maxlen, "%s%s%s",
 129                             module_str, module_str ? ": " : "", txt);
 130
 131         if ((conf_stdout & module) && level >= conf_stdout_level) {
 132                 wpa_debug_print_timestamp();
 133                 printf("%s\n", format);
 134         }
 135
 136 #ifndef CONFIG_NATIVE_WINDOWS
 137         if ((conf_syslog & module) && level >= conf_syslog_level) {
 138                 int priority;
 139                 switch (level) {
 140                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 141                 case HOSTAPD_LEVEL_DEBUG:
 142                         priority = LOG_DEBUG;
 143                         break;
 144                 case HOSTAPD_LEVEL_INFO:
 145                         priority = LOG_INFO;
 146                         break;
 147                 case HOSTAPD_LEVEL_NOTICE:
 148                         priority = LOG_NOTICE;
 149                         break;
 150                 case HOSTAPD_LEVEL_WARNING:
 151                         priority = LOG_WARNING;
 152                         break;
 153                 default:
 154                         priority = LOG_INFO;
 155                         break;
 156                 }
 157                 syslog(priority, "%s", format);
 158         }
 159 #endif /* CONFIG_NATIVE_WINDOWS */
 160
 161         os_free(format);
 162 }
 163 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 164
 165
 166 /**
 167  * hostapd_init - Allocate and initialize per-interface data
 168  * @config_file: Path to the configuration file
 169  * Returns: Pointer to the allocated interface data or %NULL on failure
 170  *
 171  * This function is used to allocate main data structures for per-interface
 172  * data. The allocated data buffer will be freed by calling
 173  * hostapd_cleanup_iface().
 174  */
 175 static struct hostapd_iface * hostapd_init(const char *config_file)
 176 {
 177         struct hostapd_iface *hapd_iface = NULL;
 178         struct hostapd_config *conf = NULL;
 179         struct hostapd_data *hapd;
 180         size_t i;
 181
 182         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 183         if (hapd_iface == NULL)
 184                 goto fail;
 185
 186         hapd_iface->reload_config = hostapd_reload_config;
 187         hapd_iface->config_read_cb = hostapd_config_read;
 188         hapd_iface->config_fname = os_strdup(config_file);
 189         if (hapd_iface->config_fname == NULL)
 190                 goto fail;
 191         hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
 192         hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 193         hapd_iface->for_each_interface = hostapd_for_each_interface;
 194
 195         conf = hostapd_config_read(hapd_iface->config_fname);
 196         if (conf == NULL)
 197                 goto fail;
 198         hapd_iface->conf = conf;
 199
 200         hapd_iface->num_bss = conf->num_bss;
 201         hapd_iface->bss = os_zalloc(conf->num_bss *
 202                                     sizeof(struct hostapd_data *));
 203         if (hapd_iface->bss == NULL)
 204                 goto fail;
 205
 206         for (i = 0; i < conf->num_bss; i++) {
 207                 hapd = hapd_iface->bss[i] =
 208                         hostapd_alloc_bss_data(hapd_iface, conf,
 209                                                &conf->bss[i]);
 210                 if (hapd == NULL)
 211                         goto fail;
 212         }
 213
 214         return hapd_iface;
 215
 216 fail:
 217         if (conf)
 218                 hostapd_config_free(conf);
 219         if (hapd_iface) {
 220                 os_free(hapd_iface->config_fname);
 221                 os_free(hapd_iface->bss);
 222                 os_free(hapd_iface);
 223         }
 224         return NULL;
 225 }
 226
 227
 228 static int hostapd_driver_init(struct hostapd_iface *iface)
 229 {
 230         struct wpa_init_params params;
 231         size_t i;
 232         struct hostapd_data *hapd = iface->bss[0];
 233         struct hostapd_bss_config *conf = hapd->conf;
 234         u8 *b = conf->bssid;
 235
 236         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 237                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 238                 return -1;
 239         }
 240
 241         /* Initialize the driver interface */
 242         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 243                 b = NULL;
 244
 245         os_memset(&params, 0, sizeof(params));
 246         params.bssid = b;
 247         params.ifname = hapd->conf->iface;
 248         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 249         params.ssid_len = hapd->conf->ssid.ssid_len;
 250         params.test_socket = hapd->conf->test_socket;
 251         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 252
 253         params.num_bridge = hapd->iface->num_bss;
 254         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 255         if (params.bridge == NULL)
 256                 return -1;
 257         for (i = 0; i < hapd->iface->num_bss; i++) {
 258                 struct hostapd_data *bss = hapd->iface->bss[i];
 259                 if (bss->conf->bridge[0])
 260                         params.bridge[i] = bss->conf->bridge;
 261         }
 262
 263         params.own_addr = hapd->own_addr;
 264
 265         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 266         os_free(params.bridge);
 267         if (hapd->drv_priv == NULL) {
 268                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 269                            hapd->driver->name);
 270                 hapd->driver = NULL;
 271                 return -1;
 272         }
 273
 274         return 0;
 275 }
 276
 277
 278 static void hostapd_interface_deinit_free(struct hostapd_iface *iface)
 279 {
 280         const struct wpa_driver_ops *driver;
 281         void *drv_priv;
 282         if (iface == NULL)
 283                 return;
 284         driver = iface->bss[0]->driver;
 285         drv_priv = iface->bss[0]->drv_priv;
 286         hostapd_interface_deinit(iface);
 287         if (driver && driver->hapd_deinit)
 288                 driver->hapd_deinit(drv_priv);
 289         hostapd_interface_free(iface);
 290 }
 291
 292
 293 static struct hostapd_iface *
 294 hostapd_interface_init(struct hapd_interfaces *interfaces,
 295                        const char *config_fname, int debug)
 296 {
 297         struct hostapd_iface *iface;
 298         int k;
 299
 300         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 301         iface = hostapd_init(config_fname);
 302         if (!iface)
 303                 return NULL;
 304         iface->interfaces = interfaces;
 305
 306         for (k = 0; k < debug; k++) {
 307                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 308                         iface->bss[0]->conf->logger_stdout_level--;
 309         }
 310
 311         if (hostapd_driver_init(iface) ||
 312             hostapd_setup_interface(iface)) {
 313                 hostapd_interface_deinit_free(iface);
 314                 return NULL;
 315         }
 316
 317         return iface;
 318 }
 319
 320
 321 /**
 322  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 323  */
 324 static void handle_term(int sig, void *signal_ctx)
 325 {
 326         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 327         eloop_terminate();
 328 }
 329
 330
 331 #ifndef CONFIG_NATIVE_WINDOWS
 332
 333 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 334 {
 335         if (hostapd_reload_config(iface) < 0) {
 336                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 337                            "file - continuing with old.");
 338         }
 339         return 0;
 340 }
 341
 342
 343 /**
 344  * handle_reload - SIGHUP handler to reload configuration
 345  */
 346 static void handle_reload(int sig, void *signal_ctx)
 347 {
 348         struct hapd_interfaces *interfaces = signal_ctx;
 349         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 350                    sig);
 351         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 352 }
 353
 354
 355 static void handle_dump_state(int sig, void *signal_ctx)
 356 {
 357 #ifdef HOSTAPD_DUMP_STATE
 358         struct hapd_interfaces *interfaces = signal_ctx;
 359         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 360 #endif /* HOSTAPD_DUMP_STATE */
 361 }
 362 #endif /* CONFIG_NATIVE_WINDOWS */
 363
 364
 365 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 366 {
 367         hostapd_logger_register_cb(hostapd_logger_cb);
 368
 369         if (eap_server_register_methods()) {
 370                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 371                 return -1;
 372         }
 373
 374         if (eloop_init()) {
 375                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 376                 return -1;
 377         }
 378
 379 #ifndef CONFIG_NATIVE_WINDOWS
 380         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 381         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 382 #endif /* CONFIG_NATIVE_WINDOWS */
 383         eloop_register_signal_terminate(handle_term, interfaces);
 384
 385 #ifndef CONFIG_NATIVE_WINDOWS
 386         openlog("hostapd", 0, LOG_DAEMON);
 387 #endif /* CONFIG_NATIVE_WINDOWS */
 388
 389         return 0;
 390 }
 391
 392
 393 static void hostapd_global_deinit(const char *pid_file)
 394 {
 395 #ifdef EAP_SERVER_TNC
 396         tncs_global_deinit();
 397 #endif /* EAP_SERVER_TNC */
 398
 399         eloop_destroy();
 400
 401 #ifndef CONFIG_NATIVE_WINDOWS
 402         closelog();
 403 #endif /* CONFIG_NATIVE_WINDOWS */
 404
 405         eap_server_unregister_methods();
 406
 407         os_daemonize_terminate(pid_file);
 408 }
 409
 410
 411 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 412                               const char *pid_file)
 413 {
 414 #ifdef EAP_SERVER_TNC
 415         int tnc = 0;
 416         size_t i, k;
 417
 418         for (i = 0; !tnc && i < ifaces->count; i++) {
 419                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 420                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 421                                 tnc++;
 422                                 break;
 423                         }
 424                 }
 425         }
 426
 427         if (tnc && tncs_global_init() < 0) {
 428                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 429                 return -1;
 430         }
 431 #endif /* EAP_SERVER_TNC */
 432
 433         if (daemonize && os_daemonize(pid_file)) {
 434                 perror("daemon");
 435                 return -1;
 436         }
 437
 438         eloop_run();
 439
 440         return 0;
 441 }
 442
 443
 444 static void show_version(void)
 445 {
 446         fprintf(stderr,
 447                 "hostapd v" VERSION_STR "\n"
 448                 "User space daemon for IEEE 802.11 AP management,\n"
 449                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 450                 "Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi> "
 451                 "and contributors\n");
 452 }
 453
 454
 455 static void usage(void)
 456 {
 457         show_version();
 458         fprintf(stderr,
 459                 "\n"
 460                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 461                 "<configuration file(s)>\n"
 462                 "\n"
 463                 "options:\n"
 464                 "   -h   show this usage\n"
 465                 "   -d   show more debug messages (-dd for even more)\n"
 466                 "   -B   run daemon in the background\n"
 467                 "   -P   PID file\n"
 468                 "   -K   include key data in debug messages\n"
 469                 "   -t   include timestamps in some debug messages\n"
 470                 "   -v   show hostapd version\n");
 471
 472         exit(1);
 473 }
 474
 475
 476 int main(int argc, char *argv[])
 477 {
 478         struct hapd_interfaces interfaces;
 479         int ret = 1;
 480         size_t i;
 481         int c, debug = 0, daemonize = 0;
 482         char *pid_file = NULL;
 483
 484         if (os_program_init())
 485                 return -1;
 486
 487         for (;;) {
 488                 c = getopt(argc, argv, "BdhKP:tv");
 489                 if (c < 0)
 490                         break;
 491                 switch (c) {
 492                 case 'h':
 493                         usage();
 494                         break;
 495                 case 'd':
 496                         debug++;
 497                         if (wpa_debug_level > 0)
 498                                 wpa_debug_level--;
 499                         break;
 500                 case 'B':
 501                         daemonize++;
 502                         break;
 503                 case 'K':
 504                         wpa_debug_show_keys++;
 505                         break;
 506                 case 'P':
 507                         os_free(pid_file);
 508                         pid_file = os_rel2abs_path(optarg);
 509                         break;
 510                 case 't':
 511                         wpa_debug_timestamp++;
 512                         break;
 513                 case 'v':
 514                         show_version();
 515                         exit(1);
 516                         break;
 517
 518                 default:
 519                         usage();
 520                         break;
 521                 }
 522         }
 523
 524         if (optind == argc)
 525                 usage();
 526
 527         interfaces.count = argc - optind;
 528         interfaces.iface = os_malloc(interfaces.count *
 529                                      sizeof(struct hostapd_iface *));
 530         if (interfaces.iface == NULL) {
 531                 wpa_printf(MSG_ERROR, "malloc failed\n");
 532                 return -1;
 533         }
 534
 535         if (hostapd_global_init(&interfaces))
 536                 return -1;
 537
 538         /* Initialize interfaces */
 539         for (i = 0; i < interfaces.count; i++) {
 540                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 541                                                              argv[optind + i],
 542                                                              debug);
 543                 if (!interfaces.iface[i])
 544                         goto out;
 545         }
 546
 547         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 548                 goto out;
 549
 550         ret = 0;
 551
 552  out:
 553         /* Deinitialize all interfaces */
 554         for (i = 0; i < interfaces.count; i++)
 555                 hostapd_interface_deinit_free(interfaces.iface[i]);
 556         os_free(interfaces.iface);
 557
 558         hostapd_global_deinit(pid_file);
 559         os_free(pid_file);
 560
 561         os_program_deinit();
 562
 563         return ret;
 564 }