libeap/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                "  -i = interface name\n"
  69                "  -I = additional configuration file\n"
  70                "  -d = increase debugging verbosity (-dd even more)\n"
  71                "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
  72                "  -e = entropy file\n");
  73 #ifdef CONFIG_DEBUG_FILE
  74         printf("  -f = log output to debug file instead of stdout\n");
  75 #endif /* CONFIG_DEBUG_FILE */
  76         printf("  -g = global ctrl_interface\n"
  77                "  -G = global ctrl_interface group\n"
  78                "  -K = include keys (passwords, etc.) in debug output\n");
  79 #ifdef CONFIG_DEBUG_SYSLOG
  80         printf("  -s = log output to syslog instead of stdout\n");
  81 #endif /* CONFIG_DEBUG_SYSLOG */
  82 #ifdef CONFIG_DEBUG_LINUX_TRACING
  83         printf("  -T = record to Linux tracing in addition to logging\n");
  84         printf("       (records all messages regardless of debug verbosity)\n");
  85 #endif /* CONFIG_DEBUG_LINUX_TRACING */
  86         printf("  -t = include timestamp in debug messages\n"
  87                "  -h = show this help text\n"
  88                "  -L = show license (BSD)\n"
  89                "  -o = override driver parameter for new interfaces\n"
  90                "  -O = override ctrl_interface parameter for new interfaces\n"
  91                "  -p = driver parameters\n"
  92                "  -P = PID file\n"
  93                "  -q = decrease debugging verbosity (-qq even less)\n");
  94 #ifdef CONFIG_DBUS
  95         printf("  -u = enable DBus control interface\n");
  96 #endif /* CONFIG_DBUS */
  97         printf("  -v = show version\n"
  98                "  -W = wait for a control interface monitor before starting\n"
  99 #ifdef CONFIG_P2P
 100                "  -m = Configuration file for the P2P Device interface\n"
 101 #endif /* CONFIG_P2P */
 102                "  -N = start describing new interface\n");
 103
 104         printf("example:\n"
 105                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
 106                wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
 107 #endif /* CONFIG_NO_STDOUT_DEBUG */
 108 }
 109
 110
 111 static void license(void)
 112 {
 113 #ifndef CONFIG_NO_STDOUT_DEBUG
 114         printf("%s\n\n%s%s%s%s%s\n",
 115                wpa_supplicant_version,
 116                wpa_supplicant_full_license1,
 117                wpa_supplicant_full_license2,
 118                wpa_supplicant_full_license3,
 119                wpa_supplicant_full_license4,
 120                wpa_supplicant_full_license5);
 121 #endif /* CONFIG_NO_STDOUT_DEBUG */
 122 }
 123
 124
 125 static void wpa_supplicant_fd_workaround(int start)
 126 {
 127 #ifdef __linux__
 128         static int fd[3] = { -1, -1, -1 };
 129         int i;
 130         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 131          * fd 0, 1, and 2 closed. This will cause some issues because many
 132          * places in wpa_supplicant are still printing out to stdout. As a
 133          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 134          * sockets. */
 135         if (start) {
 136                 for (i = 0; i < 3; i++) {
 137                         fd[i] = open("/dev/null", O_RDWR);
 138                         if (fd[i] > 2) {
 139                                 close(fd[i]);
 140                                 fd[i] = -1;
 141                                 break;
 142                         }
 143                 }
 144         } else {
 145                 for (i = 0; i < 3; i++) {
 146                         if (fd[i] >= 0) {
 147                                 close(fd[i]);
 148                                 fd[i] = -1;
 149                         }
 150                 }
 151         }
 152 #endif /* __linux__ */
 153 }
 154
 155
 156 int main(int argc, char *argv[])
 157 {
 158         int c, i;
 159         struct wpa_interface *ifaces, *iface;
 160         int iface_count, exitcode = -1;
 161         struct wpa_params params;
 162         struct wpa_global *global;
 163
 164         if (os_program_init())
 165                 return -1;
 166
 167         os_memset(&params, 0, sizeof(params));
 168         params.wpa_debug_level = MSG_INFO;
 169
 170         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 171         if (ifaces == NULL)
 172                 return -1;
 173         iface_count = 1;
 174
 175         wpa_supplicant_fd_workaround(1);
 176
 177         for (;;) {
 178                 c = getopt(argc, argv,
 179                            "b:Bc:C:D:de:f:g:G:hi:I:KLm:No:O:p:P:qsTtuvW");
 180                 if (c < 0)
 181                         break;
 182                 switch (c) {
 183                 case 'b':
 184                         iface->bridge_ifname = optarg;
 185                         break;
 186                 case 'B':
 187                         params.daemonize++;
 188                         break;
 189                 case 'c':
 190                         iface->confname = optarg;
 191                         break;
 192                 case 'C':
 193                         iface->ctrl_interface = optarg;
 194                         break;
 195                 case 'D':
 196                         iface->driver = optarg;
 197                         break;
 198                 case 'd':
 199 #ifdef CONFIG_NO_STDOUT_DEBUG
 200                         printf("Debugging disabled with "
 201                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 202                                "option.\n");
 203                         goto out;
 204 #else /* CONFIG_NO_STDOUT_DEBUG */
 205                         params.wpa_debug_level--;
 206                         break;
 207 #endif /* CONFIG_NO_STDOUT_DEBUG */
 208                 case 'e':
 209                         params.entropy_file = optarg;
 210                         break;
 211 #ifdef CONFIG_DEBUG_FILE
 212                 case 'f':
 213                         params.wpa_debug_file_path = optarg;
 214                         break;
 215 #endif /* CONFIG_DEBUG_FILE */
 216                 case 'g':
 217                         params.ctrl_interface = optarg;
 218                         break;
 219                 case 'G':
 220                         params.ctrl_interface_group = optarg;
 221                         break;
 222                 case 'h':
 223                         usage();
 224                         exitcode = 0;
 225                         goto out;
 226                 case 'i':
 227                         iface->ifname = optarg;
 228                         break;
 229                 case 'I':
 230                         iface->confanother = optarg;
 231                         break;
 232                 case 'K':
 233                         params.wpa_debug_show_keys++;
 234                         break;
 235                 case 'L':
 236                         license();
 237                         exitcode = 0;
 238                         goto out;
 239 #ifdef CONFIG_P2P
 240                 case 'm':
 241                         params.conf_p2p_dev = optarg;
 242                         break;
 243 #endif /* CONFIG_P2P */
 244                 case 'o':
 245                         params.override_driver = optarg;
 246                         break;
 247                 case 'O':
 248                         params.override_ctrl_interface = optarg;
 249                         break;
 250                 case 'p':
 251                         iface->driver_param = optarg;
 252                         break;
 253                 case 'P':
 254                         os_free(params.pid_file);
 255                         params.pid_file = os_rel2abs_path(optarg);
 256                         break;
 257                 case 'q':
 258                         params.wpa_debug_level++;
 259                         break;
 260 #ifdef CONFIG_DEBUG_SYSLOG
 261                 case 's':
 262                         params.wpa_debug_syslog++;
 263                         break;
 264 #endif /* CONFIG_DEBUG_SYSLOG */
 265 #ifdef CONFIG_DEBUG_LINUX_TRACING
 266                 case 'T':
 267                         params.wpa_debug_tracing++;
 268                         break;
 269 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 270                 case 't':
 271                         params.wpa_debug_timestamp++;
 272                         break;
 273 #ifdef CONFIG_DBUS
 274                 case 'u':
 275                         params.dbus_ctrl_interface = 1;
 276                         break;
 277 #endif /* CONFIG_DBUS */
 278                 case 'v':
 279                         printf("%s\n", wpa_supplicant_version);
 280                         exitcode = 0;
 281                         goto out;
 282                 case 'W':
 283                         params.wait_for_monitor++;
 284                         break;
 285                 case 'N':
 286                         iface_count++;
 287                         iface = os_realloc_array(ifaces, iface_count,
 288                                                  sizeof(struct wpa_interface));
 289                         if (iface == NULL)
 290                                 goto out;
 291                         ifaces = iface;
 292                         iface = &ifaces[iface_count - 1];
 293                         os_memset(iface, 0, sizeof(*iface));
 294                         break;
 295                 default:
 296                         usage();
 297                         exitcode = 0;
 298                         goto out;
 299                 }
 300         }
 301
 302         exitcode = 0;
 303         global = wpa_supplicant_init(&params);
 304         if (global == NULL) {
 305                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 306                 exitcode = -1;
 307                 goto out;
 308         } else {
 309                 wpa_printf(MSG_INFO, "Successfully initialized "
 310                            "wpa_supplicant");
 311         }
 312
 313         if (fst_global_init()) {
 314                 wpa_printf(MSG_ERROR, "Failed to initialize FST");
 315                 exitcode = -1;
 316                 goto out;
 317         }
 318
 319 #if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE)
 320         if (!fst_global_add_ctrl(fst_ctrl_cli))
 321                 wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl");
 322 #endif
 323
 324         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 325                 struct wpa_supplicant *wpa_s;
 326
 327                 if ((ifaces[i].confname == NULL &&
 328                      ifaces[i].ctrl_interface == NULL) ||
 329                     ifaces[i].ifname == NULL) {
 330                         if (iface_count == 1 && (params.ctrl_interface ||
 331                                                  params.dbus_ctrl_interface))
 332                                 break;
 333                         usage();
 334                         exitcode = -1;
 335                         break;
 336                 }
 337                 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
 338                 if (wpa_s == NULL) {
 339                         exitcode = -1;
 340                         break;
 341                 }
 342         }
 343
 344         if (exitcode == 0)
 345                 exitcode = wpa_supplicant_run(global);
 346
 347         wpa_supplicant_deinit(global);
 348
 349         fst_global_deinit();
 350
 351 out:
 352         wpa_supplicant_fd_workaround(0);
 353         os_free(ifaces);
 354         os_free(params.pid_file);
 355
 356         os_program_deinit();
 357
 358         return exitcode;
 359 }