wpa_supplicant/main.c

   1 /*
   2  * WPA Supplicant / main() function for UNIX like OSes and MinGW
   3  * Copyright (c) 2003-2013, 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 "includes.h"
  10 #ifdef __linux__
  11 #include <fcntl.h>
  12 #endif /* __linux__ */
  13
  14 #include "common.h"
  15 #include "fst/fst.h"
  16 #include "wpa_supplicant_i.h"
  17 #include "driver_i.h"
  18 #include "p2p_supplicant.h"
  19
  20
  21 static void usage(void)
  22 {
  23         int i;
  24         printf("%s\n\n%s\n"
  25                "usage:\n"
  26                "  wpa_supplicant [-BddhKLqq"
  27 #ifdef CONFIG_DEBUG_SYSLOG
  28                "s"
  29 #endif /* CONFIG_DEBUG_SYSLOG */
  30                "t"
  31 #ifdef CONFIG_DBUS
  32                "u"
  33 #endif /* CONFIG_DBUS */
  34                "vW] [-P<pid file>] "
  35                "[-g<global ctrl>] \\\n"
  36                "        [-G<group>] \\\n"
  37                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  38                "[-p<driver_param>] \\\n"
  39                "        [-b<br_ifname>] [-e<entropy file>]"
  40 #ifdef CONFIG_DEBUG_FILE
  41                " [-f<debug file>]"
  42 #endif /* CONFIG_DEBUG_FILE */
  43                " \\\n"
  44                "        [-o<override driver>] [-O<override ctrl>] \\\n"
  45                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  46                "[-D<driver>] \\\n"
  47 #ifdef CONFIG_P2P
  48                "        [-m<P2P Device config file>] \\\n"
  49 #endif /* CONFIG_P2P */
  50                "        [-p<driver_param>] [-b<br_ifname>] [-I<config file>] "
  51                "...]\n"
  52                "\n"
  53                "drivers:\n",
  54                wpa_supplicant_version, wpa_supplicant_license);
  55
  56         for (i = 0; wpa_drivers[i]; i++) {
  57                 printf("  %s = %s\n",
  58                        wpa_drivers[i]->name,
  59                        wpa_drivers[i]->desc);
  60         }
  61
  62 #ifndef CONFIG_NO_STDOUT_DEBUG
  63         printf("options:\n"
  64                "  -b = optional bridge interface name\n"
  65                "  -B = run daemon in the background\n"
  66                "  -c = Configuration file\n"
  67                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  68                "  -d = increase debugging verbosity (-dd even more)\n"
  69                "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
  70                "  -e = entropy file\n"
  71 #ifdef CONFIG_DEBUG_FILE
  72                "  -f = log output to debug file instead of stdout\n"
  73 #endif /* CONFIG_DEBUG_FILE */
  74                "  -g = global ctrl_interface\n"
  75                "  -G = global ctrl_interface group\n"
  76                "  -h = show this help text\n"
  77                "  -i = interface name\n"
  78                "  -I = additional configuration file\n"
  79                "  -K = include keys (passwords, etc.) in debug output\n"
  80                "  -L = show license (BSD)\n"
  81 #ifdef CONFIG_P2P
  82                "  -m = Configuration file for the P2P Device interface\n"
  83 #endif /* CONFIG_P2P */
  84 #ifdef CONFIG_MATCH_IFACE
  85                "  -M = start describing new matching interface\n"
  86 #endif /* CONFIG_MATCH_IFACE */
  87                "  -N = start describing new interface\n"
  88                "  -o = override driver parameter for new interfaces\n"
  89                "  -O = override ctrl_interface parameter for new interfaces\n"
  90                "  -p = driver parameters\n"
  91                "  -P = PID file\n"
  92                "  -q = decrease debugging verbosity (-qq even less)\n"
  93 #ifdef CONFIG_DEBUG_SYSLOG
  94                "  -s = log output to syslog instead of stdout\n"
  95 #endif /* CONFIG_DEBUG_SYSLOG */
  96                "  -t = include timestamp in debug messages\n"
  97 #ifdef CONFIG_DEBUG_LINUX_TRACING
  98                "  -T = record to Linux tracing in addition to logging\n"
  99                "       (records all messages regardless of debug verbosity)\n"
 100 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 101 #ifdef CONFIG_DBUS
 102                "  -u = enable DBus control interface\n"
 103 #endif /* CONFIG_DBUS */
 104                "  -v = show version\n"
 105                "  -W = wait for a control interface monitor before starting\n");
 106
 107         printf("example:\n"
 108                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
 109                wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
 110 #endif /* CONFIG_NO_STDOUT_DEBUG */
 111 }
 112
 113
 114 static void license(void)
 115 {
 116 #ifndef CONFIG_NO_STDOUT_DEBUG
 117         printf("%s\n\n%s%s%s%s%s\n",
 118                wpa_supplicant_version,
 119                wpa_supplicant_full_license1,
 120                wpa_supplicant_full_license2,
 121                wpa_supplicant_full_license3,
 122                wpa_supplicant_full_license4,
 123                wpa_supplicant_full_license5);
 124 #endif /* CONFIG_NO_STDOUT_DEBUG */
 125 }
 126
 127
 128 static void wpa_supplicant_fd_workaround(int start)
 129 {
 130 #ifdef __linux__
 131         static int fd[3] = { -1, -1, -1 };
 132         int i;
 133         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 134          * fd 0, 1, and 2 closed. This will cause some issues because many
 135          * places in wpa_supplicant are still printing out to stdout. As a
 136          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 137          * sockets. */
 138         if (start) {
 139                 for (i = 0; i < 3; i++) {
 140                         fd[i] = open("/dev/null", O_RDWR);
 141                         if (fd[i] > 2) {
 142                                 close(fd[i]);
 143                                 fd[i] = -1;
 144                                 break;
 145                         }
 146                 }
 147         } else {
 148                 for (i = 0; i < 3; i++) {
 149                         if (fd[i] >= 0) {
 150                                 close(fd[i]);
 151                                 fd[i] = -1;
 152                         }
 153                 }
 154         }
 155 #endif /* __linux__ */
 156 }
 157
 158
 159 #ifdef CONFIG_MATCH_IFACE
 160 static int wpa_supplicant_init_match(struct wpa_global *global)
 161 {
 162         /*
 163          * The assumption is that the first driver is the primary driver and
 164          * will handle the arrival / departure of interfaces.
 165          */
 166         if (wpa_drivers[0]->global_init && !global->drv_priv[0]) {
 167                 global->drv_priv[0] = wpa_drivers[0]->global_init(global);
 168                 if (!global->drv_priv[0]) {
 169                         wpa_printf(MSG_ERROR,
 170                                    "Failed to initialize driver '%s'",
 171                                    wpa_drivers[0]->name);
 172                         return -1;
 173                 }
 174         }
 175
 176         return 0;
 177 }
 178 #endif /* CONFIG_MATCH_IFACE */
 179
 180
 181 int main(int argc, char *argv[])
 182 {
 183         int c, i;
 184         struct wpa_interface *ifaces, *iface;
 185         int iface_count, exitcode = -1;
 186         struct wpa_params params;
 187         struct wpa_global *global;
 188
 189         if (os_program_init())
 190                 return -1;
 191
 192         os_memset(&params, 0, sizeof(params));
 193         params.wpa_debug_level = MSG_INFO;
 194
 195         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 196         if (ifaces == NULL)
 197                 return -1;
 198         iface_count = 1;
 199
 200         wpa_supplicant_fd_workaround(1);
 201
 202         for (;;) {
 203                 c = getopt(argc, argv,
 204                            "b:Bc:C:D:de:f:g:G:hi:I:KLMm:No:O:p:P:qsTtuvW");
 205                 if (c < 0)
 206                         break;
 207                 switch (c) {
 208                 case 'b':
 209                         iface->bridge_ifname = optarg;
 210                         break;
 211                 case 'B':
 212                         params.daemonize++;
 213                         break;
 214                 case 'c':
 215                         iface->confname = optarg;
 216                         break;
 217                 case 'C':
 218                         iface->ctrl_interface = optarg;
 219                         break;
 220                 case 'D':
 221                         iface->driver = optarg;
 222                         break;
 223                 case 'd':
 224 #ifdef CONFIG_NO_STDOUT_DEBUG
 225                         printf("Debugging disabled with "
 226                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 227                                "option.\n");
 228                         goto out;
 229 #else /* CONFIG_NO_STDOUT_DEBUG */
 230                         params.wpa_debug_level--;
 231                         break;
 232 #endif /* CONFIG_NO_STDOUT_DEBUG */
 233                 case 'e':
 234                         params.entropy_file = optarg;
 235                         break;
 236 #ifdef CONFIG_DEBUG_FILE
 237                 case 'f':
 238                         params.wpa_debug_file_path = optarg;
 239                         break;
 240 #endif /* CONFIG_DEBUG_FILE */
 241                 case 'g':
 242                         params.ctrl_interface = optarg;
 243                         break;
 244                 case 'G':
 245                         params.ctrl_interface_group = optarg;
 246                         break;
 247                 case 'h':
 248                         usage();
 249                         exitcode = 0;
 250                         goto out;
 251                 case 'i':
 252                         iface->ifname = optarg;
 253                         break;
 254                 case 'I':
 255                         iface->confanother = optarg;
 256                         break;
 257                 case 'K':
 258                         params.wpa_debug_show_keys++;
 259                         break;
 260                 case 'L':
 261                         license();
 262                         exitcode = 0;
 263                         goto out;
 264 #ifdef CONFIG_P2P
 265                 case 'm':
 266                         params.conf_p2p_dev = optarg;
 267                         break;
 268 #endif /* CONFIG_P2P */
 269                 case 'o':
 270                         params.override_driver = optarg;
 271                         break;
 272                 case 'O':
 273                         params.override_ctrl_interface = optarg;
 274                         break;
 275                 case 'p':
 276                         iface->driver_param = optarg;
 277                         break;
 278                 case 'P':
 279                         os_free(params.pid_file);
 280                         params.pid_file = os_rel2abs_path(optarg);
 281                         break;
 282                 case 'q':
 283                         params.wpa_debug_level++;
 284                         break;
 285 #ifdef CONFIG_DEBUG_SYSLOG
 286                 case 's':
 287                         params.wpa_debug_syslog++;
 288                         break;
 289 #endif /* CONFIG_DEBUG_SYSLOG */
 290 #ifdef CONFIG_DEBUG_LINUX_TRACING
 291                 case 'T':
 292                         params.wpa_debug_tracing++;
 293                         break;
 294 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 295                 case 't':
 296                         params.wpa_debug_timestamp++;
 297                         break;
 298 #ifdef CONFIG_DBUS
 299                 case 'u':
 300                         params.dbus_ctrl_interface = 1;
 301                         break;
 302 #endif /* CONFIG_DBUS */
 303                 case 'v':
 304                         printf("%s\n", wpa_supplicant_version);
 305                         exitcode = 0;
 306                         goto out;
 307                 case 'W':
 308                         params.wait_for_monitor++;
 309                         break;
 310 #ifdef CONFIG_MATCH_IFACE
 311                 case 'M':
 312                         params.match_iface_count++;
 313                         iface = os_realloc_array(params.match_ifaces,
 314                                                  params.match_iface_count,
 315                                                  sizeof(struct wpa_interface));
 316                         if (!iface)
 317                                 goto out;
 318                         params.match_ifaces = iface;
 319                         iface = &params.match_ifaces[params.match_iface_count -
 320                                                      1];
 321                         os_memset(iface, 0, sizeof(*iface));
 322                         break;
 323 #endif /* CONFIG_MATCH_IFACE */
 324                 case 'N':
 325                         iface_count++;
 326                         iface = os_realloc_array(ifaces, iface_count,
 327                                                  sizeof(struct wpa_interface));
 328                         if (iface == NULL)
 329                                 goto out;
 330                         ifaces = iface;
 331                         iface = &ifaces[iface_count - 1];
 332                         os_memset(iface, 0, sizeof(*iface));
 333                         break;
 334                 default:
 335                         usage();
 336                         exitcode = 0;
 337                         goto out;
 338                 }
 339         }
 340
 341         exitcode = 0;
 342         global = wpa_supplicant_init(&params);
 343         if (global == NULL) {
 344                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 345                 exitcode = -1;
 346                 goto out;
 347         } else {
 348                 wpa_printf(MSG_INFO, "Successfully initialized "
 349                            "wpa_supplicant");
 350         }
 351
 352         if (fst_global_init()) {
 353                 wpa_printf(MSG_ERROR, "Failed to initialize FST");
 354                 exitcode = -1;
 355                 goto out;
 356         }
 357
 358 #if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE)
 359         if (!fst_global_add_ctrl(fst_ctrl_cli))
 360                 wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl");
 361 #endif
 362
 363         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 364                 struct wpa_supplicant *wpa_s;
 365
 366                 if ((ifaces[i].confname == NULL &&
 367                      ifaces[i].ctrl_interface == NULL) ||
 368                     ifaces[i].ifname == NULL) {
 369                         if (iface_count == 1 && (params.ctrl_interface ||
 370 #ifdef CONFIG_MATCH_IFACE
 371                                                  params.match_iface_count ||
 372 #endif /* CONFIG_MATCH_IFACE */
 373                                                  params.dbus_ctrl_interface))
 374                                 break;
 375                         usage();
 376                         exitcode = -1;
 377                         break;
 378                 }
 379                 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
 380                 if (wpa_s == NULL) {
 381                         exitcode = -1;
 382                         break;
 383                 }
 384         }
 385
 386 #ifdef CONFIG_MATCH_IFACE
 387         if (exitcode == 0)
 388                 exitcode = wpa_supplicant_init_match(global);
 389 #endif /* CONFIG_MATCH_IFACE */
 390
 391         if (exitcode == 0)
 392                 exitcode = wpa_supplicant_run(global);
 393
 394         wpa_supplicant_deinit(global);
 395
 396         fst_global_deinit();
 397
 398 out:
 399         wpa_supplicant_fd_workaround(0);
 400         os_free(ifaces);
 401 #ifdef CONFIG_MATCH_IFACE
 402         os_free(params.match_ifaces);
 403 #endif /* CONFIG_MATCH_IFACE */
 404         os_free(params.pid_file);
 405
 406         os_program_deinit();
 407
 408         return exitcode;
 409 }