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