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 [-BddhKLqqtuvwW] [-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>] [-f<debug file>] \\\n"
  47                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  48                "[-D<driver>] \\\n"
  49                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
  50                "\n"
  51                "drivers:\n",
  52                wpa_supplicant_version, wpa_supplicant_license);
  53
  54         for (i = 0; wpa_supplicant_drivers[i]; i++) {
  55                 printf("  %s = %s\n",
  56                        wpa_supplicant_drivers[i]->name,
  57                        wpa_supplicant_drivers[i]->desc);
  58         }
  59
  60 #ifndef CONFIG_NO_STDOUT_DEBUG
  61         printf("options:\n"
  62                "  -b = optional bridge interface name\n"
  63                "  -B = run daemon in the background\n"
  64                "  -c = Configuration file\n"
  65                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  66                "  -i = interface name\n"
  67                "  -d = increase debugging verbosity (-dd even more)\n"
  68                "  -D = driver name\n"
  69 #ifdef CONFIG_DEBUG_FILE
  70                "  -f = log output to debug file instead of stdout\n"
  71 #endif /* CONFIG_DEBUG_FILE */
  72                "  -g = global ctrl_interface\n"
  73                "  -K = include keys (passwords, etc.) in debug output\n"
  74                "  -t = include timestamp in debug messages\n"
  75                "  -h = show this help text\n"
  76                "  -L = show license (GPL and BSD)\n");
  77         printf("  -p = driver parameters\n"
  78                "  -P = PID file\n"
  79                "  -q = decrease debugging verbosity (-qq even less)\n"
  80 #ifdef CONFIG_CTRL_IFACE_DBUS
  81                "  -u = enable DBus control interface\n"
  82 #endif /* CONFIG_CTRL_IFACE_DBUS */
  83                "  -v = show version\n"
  84                "  -W = wait for a control interface monitor before starting\n"
  85                "  -N = start describing new interface\n");
  86
  87         printf("example:\n"
  88                "  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
  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(void)
 108 {
 109 #ifdef __linux__
 110         int s, i;
 111         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 112          * fd 0, 1, and 2 closed. This will cause some issues because many
 113          * places in wpa_supplicant are still printing out to stdout. As a
 114          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 115          * sockets. */
 116         for (i = 0; i < 3; i++) {
 117                 s = open("/dev/null", O_RDWR);
 118                 if (s > 2) {
 119                         close(s);
 120                         break;
 121                 }
 122         }
 123 #endif /* __linux__ */
 124 }
 125
 126
 127 int main(int argc, char *argv[])
 128 {
 129         int c, i;
 130         struct wpa_interface *ifaces, *iface;
 131         int iface_count, exitcode = -1;
 132         struct wpa_params params;
 133         struct wpa_global *global;
 134
 135         if (os_program_init())
 136                 return -1;
 137
 138         os_memset(&params, 0, sizeof(params));
 139         params.wpa_debug_level = MSG_INFO;
 140
 141         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 142         if (ifaces == NULL)
 143                 return -1;
 144         iface_count = 1;
 145
 146         wpa_supplicant_fd_workaround();
 147
 148         for (;;) {
 149                 c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qtuvW");
 150                 if (c < 0)
 151                         break;
 152                 switch (c) {
 153                 case 'b':
 154                         iface->bridge_ifname = optarg;
 155                         break;
 156                 case 'B':
 157                         params.daemonize++;
 158                         break;
 159                 case 'c':
 160                         iface->confname = optarg;
 161                         break;
 162                 case 'C':
 163                         iface->ctrl_interface = optarg;
 164                         break;
 165                 case 'D':
 166                         iface->driver = optarg;
 167                         break;
 168                 case 'd':
 169 #ifdef CONFIG_NO_STDOUT_DEBUG
 170                         printf("Debugging disabled with "
 171                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 172                                "option.\n");
 173                         goto out;
 174 #else /* CONFIG_NO_STDOUT_DEBUG */
 175                         params.wpa_debug_level--;
 176                         break;
 177 #endif /* CONFIG_NO_STDOUT_DEBUG */
 178 #ifdef CONFIG_DEBUG_FILE
 179                 case 'f':
 180                         params.wpa_debug_file_path = optarg;
 181                         break;
 182 #endif /* CONFIG_DEBUG_FILE */
 183                 case 'g':
 184                         params.ctrl_interface = optarg;
 185                         break;
 186                 case 'h':
 187                         usage();
 188                         exitcode = 0;
 189                         goto out;
 190                 case 'i':
 191                         iface->ifname = optarg;
 192                         break;
 193                 case 'K':
 194                         params.wpa_debug_show_keys++;
 195                         break;
 196                 case 'L':
 197                         license();
 198                         exitcode = 0;
 199                         goto out;
 200                 case 'p':
 201                         iface->driver_param = optarg;
 202                         break;
 203                 case 'P':
 204                         os_free(params.pid_file);
 205                         params.pid_file = os_rel2abs_path(optarg);
 206                         break;
 207                 case 'q':
 208                         params.wpa_debug_level++;
 209                         break;
 210                 case 't':
 211                         params.wpa_debug_timestamp++;
 212                         break;
 213 #ifdef CONFIG_CTRL_IFACE_DBUS
 214                 case 'u':
 215                         params.dbus_ctrl_interface = 1;
 216                         break;
 217 #endif /* CONFIG_CTRL_IFACE_DBUS */
 218                 case 'v':
 219                         printf("%s\n", wpa_supplicant_version);
 220                         exitcode = 0;
 221                         goto out;
 222                 case 'W':
 223                         params.wait_for_monitor++;
 224                         break;
 225                 case 'N':
 226                         iface_count++;
 227                         iface = os_realloc(ifaces, iface_count *
 228                                            sizeof(struct wpa_interface));
 229                         if (iface == NULL)
 230                                 goto out;
 231                         ifaces = iface;
 232                         iface = &ifaces[iface_count - 1];
 233                         os_memset(iface, 0, sizeof(*iface));
 234                         break;
 235                 default:
 236                         usage();
 237                         exitcode = 0;
 238                         goto out;
 239                 }
 240         }
 241
 242         exitcode = 0;
 243         global = wpa_supplicant_init(&params);
 244         if (global == NULL) {
 245                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 246                 exitcode = -1;
 247                 goto out;
 248         }
 249
 250         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 251                 if ((ifaces[i].confname == NULL &&
 252                      ifaces[i].ctrl_interface == NULL) ||
 253                     ifaces[i].ifname == NULL) {
 254                         if (iface_count == 1 && (params.ctrl_interface ||
 255                                                  params.dbus_ctrl_interface))
 256                                 break;
 257                         usage();
 258                         exitcode = -1;
 259                         break;
 260                 }
 261                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 262                         exitcode = -1;
 263         }
 264
 265         if (exitcode == 0)
 266                 exitcode = wpa_supplicant_run(global);
 267
 268         wpa_supplicant_deinit(global);
 269
 270 out:
 271         os_free(ifaces);
 272         os_free(params.pid_file);
 273
 274         os_program_deinit();
 275
 276         return exitcode;
 277 }