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 "wpa_supplicant_i.h"
  16 #include "driver_i.h"
  17 #include "p2p_supplicant.h"
  18
  19
  20 static void usage(void)
  21 {
  22         int i;
  23         printf("%s\n\n%s\n"
  24                "usage:\n"
  25                "  wpa_supplicant [-BddhKLqq"
  26 #ifdef CONFIG_DEBUG_SYSLOG
  27                "s"
  28 #endif /* CONFIG_DEBUG_SYSLOG */
  29                "t"
  30 #ifdef CONFIG_DBUS
  31                "u"
  32 #endif /* CONFIG_DBUS */
  33                "vW] [-P<pid file>] "
  34                "[-g<global ctrl>] \\\n"
  35                "        [-G<group>] \\\n"
  36                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  37                "[-p<driver_param>] \\\n"
  38                "        [-b<br_ifname>] [-e<entropy file>]"
  39 #ifdef CONFIG_DEBUG_FILE
  40                " [-f<debug file>]"
  41 #endif /* CONFIG_DEBUG_FILE */
  42                " \\\n"
  43                "        [-o<override driver>] [-O<override ctrl>] \\\n"
  44                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  45                "[-D<driver>] \\\n"
  46                "        [-p<driver_param>] [-b<br_ifname>] [-I<config file>] "
  47                "...]\n"
  48                "\n"
  49                "drivers:\n",
  50                wpa_supplicant_version, wpa_supplicant_license);
  51
  52         for (i = 0; wpa_drivers[i]; i++) {
  53                 printf("  %s = %s\n",
  54                        wpa_drivers[i]->name,
  55                        wpa_drivers[i]->desc);
  56         }
  57
  58 #ifndef CONFIG_NO_STDOUT_DEBUG
  59         printf("options:\n"
  60                "  -b = optional bridge interface name\n"
  61                "  -B = run daemon in the background\n"
  62                "  -c = Configuration file\n"
  63                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  64                "  -i = interface name\n"
  65                "  -I = additional configuration file\n"
  66                "  -d = increase debugging verbosity (-dd even more)\n"
  67                "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
  68                "  -e = entropy file\n");
  69 #ifdef CONFIG_DEBUG_FILE
  70         printf("  -f = log output to debug file instead of stdout\n");
  71 #endif /* CONFIG_DEBUG_FILE */
  72         printf("  -g = global ctrl_interface\n"
  73                "  -G = global ctrl_interface group\n"
  74                "  -K = include keys (passwords, etc.) in debug output\n");
  75 #ifdef CONFIG_DEBUG_SYSLOG
  76         printf("  -s = log output to syslog instead of stdout\n");
  77 #endif /* CONFIG_DEBUG_SYSLOG */
  78 #ifdef CONFIG_DEBUG_LINUX_TRACING
  79         printf("  -T = record to Linux tracing in addition to logging\n");
  80         printf("       (records all messages regardless of debug verbosity)\n");
  81 #endif /* CONFIG_DEBUG_LINUX_TRACING */
  82         printf("  -t = include timestamp in debug messages\n"
  83                "  -h = show this help text\n"
  84                "  -L = show license (BSD)\n"
  85                "  -o = override driver parameter for new interfaces\n"
  86                "  -O = override ctrl_interface parameter for new interfaces\n"
  87                "  -p = driver parameters\n"
  88                "  -P = PID file\n"
  89                "  -q = decrease debugging verbosity (-qq even less)\n");
  90 #ifdef CONFIG_DBUS
  91         printf("  -u = enable DBus control interface\n");
  92 #endif /* CONFIG_DBUS */
  93         printf("  -v = show version\n"
  94                "  -W = wait for a control interface monitor before starting\n"
  95                "  -N = start describing new interface\n");
  96
  97         printf("example:\n"
  98                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
  99                wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
 100 #endif /* CONFIG_NO_STDOUT_DEBUG */
 101 }
 102
 103
 104 static void license(void)
 105 {
 106 #ifndef CONFIG_NO_STDOUT_DEBUG
 107         printf("%s\n\n%s%s%s%s%s\n",
 108                wpa_supplicant_version,
 109                wpa_supplicant_full_license1,
 110                wpa_supplicant_full_license2,
 111                wpa_supplicant_full_license3,
 112                wpa_supplicant_full_license4,
 113                wpa_supplicant_full_license5);
 114 #endif /* CONFIG_NO_STDOUT_DEBUG */
 115 }
 116
 117
 118 static void wpa_supplicant_fd_workaround(int start)
 119 {
 120 #ifdef __linux__
 121         static int fd[3] = { -1, -1, -1 };
 122         int i;
 123         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 124          * fd 0, 1, and 2 closed. This will cause some issues because many
 125          * places in wpa_supplicant are still printing out to stdout. As a
 126          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 127          * sockets. */
 128         if (start) {
 129                 for (i = 0; i < 3; i++) {
 130                         fd[i] = open("/dev/null", O_RDWR);
 131                         if (fd[i] > 2) {
 132                                 close(fd[i]);
 133                                 fd[i] = -1;
 134                                 break;
 135                         }
 136                 }
 137         } else {
 138                 for (i = 0; i < 3; i++) {
 139                         if (fd[i] >= 0) {
 140                                 close(fd[i]);
 141                                 fd[i] = -1;
 142                         }
 143                 }
 144         }
 145 #endif /* __linux__ */
 146 }
 147
 148
 149 int main(int argc, char *argv[])
 150 {
 151         int c, i;
 152         struct wpa_interface *ifaces, *iface;
 153         int iface_count, exitcode = -1;
 154         struct wpa_params params;
 155         struct wpa_global *global;
 156
 157         if (os_program_init())
 158                 return -1;
 159
 160         os_memset(&params, 0, sizeof(params));
 161         params.wpa_debug_level = MSG_INFO;
 162
 163         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 164         if (ifaces == NULL)
 165                 return -1;
 166         iface_count = 1;
 167
 168         wpa_supplicant_fd_workaround(1);
 169
 170         for (;;) {
 171                 c = getopt(argc, argv,
 172                            "b:Bc:C:D:de:f:g:G:hi:I:KLNo:O:p:P:qsTtuvW");
 173                 if (c < 0)
 174                         break;
 175                 switch (c) {
 176                 case 'b':
 177                         iface->bridge_ifname = optarg;
 178                         break;
 179                 case 'B':
 180                         params.daemonize++;
 181                         break;
 182                 case 'c':
 183                         iface->confname = optarg;
 184                         break;
 185                 case 'C':
 186                         iface->ctrl_interface = optarg;
 187                         break;
 188                 case 'D':
 189                         iface->driver = optarg;
 190                         break;
 191                 case 'd':
 192 #ifdef CONFIG_NO_STDOUT_DEBUG
 193                         printf("Debugging disabled with "
 194                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 195                                "option.\n");
 196                         goto out;
 197 #else /* CONFIG_NO_STDOUT_DEBUG */
 198                         params.wpa_debug_level--;
 199                         break;
 200 #endif /* CONFIG_NO_STDOUT_DEBUG */
 201                 case 'e':
 202                         params.entropy_file = optarg;
 203                         break;
 204 #ifdef CONFIG_DEBUG_FILE
 205                 case 'f':
 206                         params.wpa_debug_file_path = optarg;
 207                         break;
 208 #endif /* CONFIG_DEBUG_FILE */
 209                 case 'g':
 210                         params.ctrl_interface = optarg;
 211                         break;
 212                 case 'G':
 213                         params.ctrl_interface_group = optarg;
 214                         break;
 215                 case 'h':
 216                         usage();
 217                         exitcode = 0;
 218                         goto out;
 219                 case 'i':
 220                         iface->ifname = optarg;
 221                         break;
 222                 case 'I':
 223                         iface->confanother = optarg;
 224                         break;
 225                 case 'K':
 226                         params.wpa_debug_show_keys++;
 227                         break;
 228                 case 'L':
 229                         license();
 230                         exitcode = 0;
 231                         goto out;
 232                 case 'o':
 233                         params.override_driver = optarg;
 234                         break;
 235                 case 'O':
 236                         params.override_ctrl_interface = optarg;
 237                         break;
 238                 case 'p':
 239                         iface->driver_param = optarg;
 240                         break;
 241                 case 'P':
 242                         os_free(params.pid_file);
 243                         params.pid_file = os_rel2abs_path(optarg);
 244                         break;
 245                 case 'q':
 246                         params.wpa_debug_level++;
 247                         break;
 248 #ifdef CONFIG_DEBUG_SYSLOG
 249                 case 's':
 250                         params.wpa_debug_syslog++;
 251                         break;
 252 #endif /* CONFIG_DEBUG_SYSLOG */
 253 #ifdef CONFIG_DEBUG_LINUX_TRACING
 254                 case 'T':
 255                         params.wpa_debug_tracing++;
 256                         break;
 257 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 258                 case 't':
 259                         params.wpa_debug_timestamp++;
 260                         break;
 261 #ifdef CONFIG_DBUS
 262                 case 'u':
 263                         params.dbus_ctrl_interface = 1;
 264                         break;
 265 #endif /* CONFIG_DBUS */
 266                 case 'v':
 267                         printf("%s\n", wpa_supplicant_version);
 268                         exitcode = 0;
 269                         goto out;
 270                 case 'W':
 271                         params.wait_for_monitor++;
 272                         break;
 273                 case 'N':
 274                         iface_count++;
 275                         iface = os_realloc_array(ifaces, iface_count,
 276                                                  sizeof(struct wpa_interface));
 277                         if (iface == NULL)
 278                                 goto out;
 279                         ifaces = iface;
 280                         iface = &ifaces[iface_count - 1];
 281                         os_memset(iface, 0, sizeof(*iface));
 282                         break;
 283                 default:
 284                         usage();
 285                         exitcode = 0;
 286                         goto out;
 287                 }
 288         }
 289
 290         exitcode = 0;
 291         global = wpa_supplicant_init(&params);
 292         if (global == NULL) {
 293                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 294                 exitcode = -1;
 295                 goto out;
 296         } else {
 297                 wpa_printf(MSG_INFO, "Successfully initialized "
 298                            "wpa_supplicant");
 299         }
 300
 301         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 302                 struct wpa_supplicant *wpa_s;
 303
 304                 if ((ifaces[i].confname == NULL &&
 305                      ifaces[i].ctrl_interface == NULL) ||
 306                     ifaces[i].ifname == NULL) {
 307                         if (iface_count == 1 && (params.ctrl_interface ||
 308                                                  params.dbus_ctrl_interface))
 309                                 break;
 310                         usage();
 311                         exitcode = -1;
 312                         break;
 313                 }
 314                 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i]);
 315                 if (wpa_s == NULL) {
 316                         exitcode = -1;
 317                         break;
 318                 }
 319 #ifdef CONFIG_P2P
 320                 if (wpa_s->global->p2p == NULL &&
 321                     (wpa_s->drv_flags &
 322                      WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE) &&
 323                     wpas_p2p_add_p2pdev_interface(wpa_s) < 0)
 324                         exitcode = -1;
 325 #endif /* CONFIG_P2P */
 326         }
 327
 328         if (exitcode == 0)
 329                 exitcode = wpa_supplicant_run(global);
 330
 331         wpa_supplicant_deinit(global);
 332
 333 out:
 334         wpa_supplicant_fd_workaround(0);
 335         os_free(ifaces);
 336         os_free(params.pid_file);
 337
 338         os_program_deinit();
 339
 340         return exitcode;
 341 }