contrib/wpa_supplicant/main.c

   1 /*
   2  * WPA Supplicant / main() function for UNIX like OSes and MinGW
   3  * Copyright (c) 2003-2007, 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 "includes.h"
  16 #ifdef __linux__
  17 #include <fcntl.h>
  18 #endif /* __linux__ */
  19
  20 #include "common.h"
  21 #include "wpa_supplicant_i.h"
  22
  23
  24 extern const char *wpa_supplicant_version;
  25 extern const char *wpa_supplicant_license;
  26 #ifndef CONFIG_NO_STDOUT_DEBUG
  27 extern const char *wpa_supplicant_full_license1;
  28 extern const char *wpa_supplicant_full_license2;
  29 extern const char *wpa_supplicant_full_license3;
  30 extern const char *wpa_supplicant_full_license4;
  31 extern const char *wpa_supplicant_full_license5;
  32 #endif /* CONFIG_NO_STDOUT_DEBUG */
  33
  34 extern struct wpa_driver_ops *wpa_supplicant_drivers[];
  35
  36
  37 static void usage(void)
  38 {
  39         int i;
  40         printf("%s\n\n%s\n"
  41                "usage:\n"
  42                "  wpa_supplicant [-BddehLqquvwW] [-P<pid file>] "
  43                "[-g<global ctrl>] \\\n"
  44                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  45                "[-p<driver_param>] \\\n"
  46                "        [-b<br_ifname> [-N -i<ifname> -c<conf> [-C<ctrl>] "
  47                "[-D<driver>] \\\n"
  48                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
  49                "\n"
  50                "drivers:\n",
  51                wpa_supplicant_version, wpa_supplicant_license);
  52
  53         for (i = 0; wpa_supplicant_drivers[i]; i++) {
  54                 printf("  %s = %s\n",
  55                        wpa_supplicant_drivers[i]->name,
  56                        wpa_supplicant_drivers[i]->desc);
  57         }
  58
  59 #ifndef CONFIG_NO_STDOUT_DEBUG
  60         printf("options:\n"
  61                "  -b = optional bridge interface name\n"
  62                "  -B = run daemon in the background\n"
  63                "  -c = Configuration file\n"
  64                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  65                "  -i = interface name\n"
  66                "  -d = increase debugging verbosity (-dd even more)\n"
  67                "  -D = driver name\n"
  68                "  -g = global ctrl_interface\n"
  69                "  -K = include keys (passwords, etc.) in debug output\n"
  70                "  -t = include timestamp in debug messages\n"
  71                "  -h = show this help text\n"
  72                "  -L = show license (GPL and BSD)\n");
  73         printf("  -p = driver parameters\n"
  74                "  -P = PID file\n"
  75                "  -q = decrease debugging verbosity (-qq even less)\n"
  76 #ifdef CONFIG_CTRL_IFACE_DBUS
  77                "  -u = enable DBus control interface\n"
  78 #endif /* CONFIG_CTRL_IFACE_DBUS */
  79                "  -v = show version\n"
  80                "  -w = wait for interface to be added, if needed\n"
  81                "  -W = wait for a control interface monitor before starting\n"
  82                "  -N = start describing new interface\n");
  83
  84         printf("example:\n"
  85                "  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
  86 #endif /* CONFIG_NO_STDOUT_DEBUG */
  87 }
  88
  89
  90 static void license(void)
  91 {
  92 #ifndef CONFIG_NO_STDOUT_DEBUG
  93         printf("%s\n\n%s%s%s%s%s\n",
  94                wpa_supplicant_version,
  95                wpa_supplicant_full_license1,
  96                wpa_supplicant_full_license2,
  97                wpa_supplicant_full_license3,
  98                wpa_supplicant_full_license4,
  99                wpa_supplicant_full_license5);
 100 #endif /* CONFIG_NO_STDOUT_DEBUG */
 101 }
 102
 103
 104 static void wpa_supplicant_fd_workaround(void)
 105 {
 106 #ifdef __linux__
 107         int s, i;
 108         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 109          * fd 0, 1, and 2 closed. This will cause some issues because many
 110          * places in wpa_supplicant are still printing out to stdout. As a
 111          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 112          * sockets. */
 113         for (i = 0; i < 3; i++) {
 114                 s = open("/dev/null", O_RDWR);
 115                 if (s > 2) {
 116                         close(s);
 117                         break;
 118                 }
 119         }
 120 #endif /* __linux__ */
 121 }
 122
 123
 124 int main(int argc, char *argv[])
 125 {
 126         int c, i;
 127         struct wpa_interface *ifaces, *iface;
 128         int iface_count, exitcode = -1;
 129         struct wpa_params params;
 130         struct wpa_global *global;
 131
 132         if (os_program_init())
 133                 return -1;
 134
 135         os_memset(&params, 0, sizeof(params));
 136         params.wpa_debug_level = MSG_INFO;
 137
 138         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 139         if (ifaces == NULL)
 140                 return -1;
 141         iface_count = 1;
 142
 143         wpa_supplicant_fd_workaround();
 144
 145         for (;;) {
 146                 c = getopt(argc, argv, "b:Bc:C:D:dg:hi:KLNp:P:qtuvwW");
 147                 if (c < 0)
 148                         break;
 149                 switch (c) {
 150                 case 'b':
 151                         iface->bridge_ifname = optarg;
 152                         break;
 153                 case 'B':
 154                         params.daemonize++;
 155                         break;
 156                 case 'c':
 157                         iface->confname = optarg;
 158                         break;
 159                 case 'C':
 160                         iface->ctrl_interface = optarg;
 161                         break;
 162                 case 'D':
 163                         iface->driver = optarg;
 164                         break;
 165                 case 'd':
 166 #ifdef CONFIG_NO_STDOUT_DEBUG
 167                         printf("Debugging disabled with "
 168                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 169                                "option.\n");
 170                         goto out;
 171 #else /* CONFIG_NO_STDOUT_DEBUG */
 172                         params.wpa_debug_level--;
 173                         break;
 174 #endif /* CONFIG_NO_STDOUT_DEBUG */
 175                 case 'g':
 176                         params.ctrl_interface = optarg;
 177                         break;
 178                 case 'h':
 179                         usage();
 180                         exitcode = 0;
 181                         goto out;
 182                 case 'i':
 183                         iface->ifname = optarg;
 184                         break;
 185                 case 'K':
 186                         params.wpa_debug_show_keys++;
 187                         break;
 188                 case 'L':
 189                         license();
 190                         exitcode = 0;
 191                         goto out;
 192                 case 'p':
 193                         iface->driver_param = optarg;
 194                         break;
 195                 case 'P':
 196                         os_free(params.pid_file);
 197                         params.pid_file = os_rel2abs_path(optarg);
 198                         break;
 199                 case 'q':
 200                         params.wpa_debug_level++;
 201                         break;
 202                 case 't':
 203                         params.wpa_debug_timestamp++;
 204                         break;
 205 #ifdef CONFIG_CTRL_IFACE_DBUS
 206                 case 'u':
 207                         params.dbus_ctrl_interface = 1;
 208                         break;
 209 #endif /* CONFIG_CTRL_IFACE_DBUS */
 210                 case 'v':
 211                         printf("%s\n", wpa_supplicant_version);
 212                         exitcode = 0;
 213                         goto out;
 214                 case 'w':
 215                         params.wait_for_interface++;
 216                         break;
 217                 case 'W':
 218                         params.wait_for_monitor++;
 219                         break;
 220                 case 'N':
 221                         iface_count++;
 222                         iface = os_realloc(ifaces, iface_count *
 223                                            sizeof(struct wpa_interface));
 224                         if (iface == NULL)
 225                                 goto out;
 226                         ifaces = iface;
 227                         iface = &ifaces[iface_count - 1];
 228                         os_memset(iface, 0, sizeof(*iface));
 229                         break;
 230                 default:
 231                         usage();
 232                         exitcode = 0;
 233                         goto out;
 234                 }
 235         }
 236
 237         exitcode = 0;
 238         global = wpa_supplicant_init(&params);
 239         if (global == NULL) {
 240                 printf("Failed to initialize wpa_supplicant\n");
 241                 exitcode = -1;
 242                 goto out;
 243         }
 244
 245         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 246                 if ((ifaces[i].confname == NULL &&
 247                      ifaces[i].ctrl_interface == NULL) ||
 248                     ifaces[i].ifname == NULL) {
 249                         if (iface_count == 1 && (params.ctrl_interface ||
 250                                                  params.dbus_ctrl_interface))
 251                                 break;
 252                         usage();
 253                         exitcode = -1;
 254                         break;
 255                 }
 256                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 257                         exitcode = -1;
 258         }
 259
 260         if (exitcode == 0)
 261                 exitcode = wpa_supplicant_run(global);
 262
 263         wpa_supplicant_deinit(global);
 264
 265 out:
 266         os_free(ifaces);
 267         os_free(params.pid_file);
 268
 269         os_program_deinit();
 270
 271         return exitcode;
 272 }