git.maemo.org Git - wpasupplicant/blob - 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 #include "driver_i.h"
  23
  24 extern struct wpa_driver_ops *wpa_supplicant_drivers[];
  25
  26
  27 static void usage(void)
  28 {
  29         int i;
  30         printf("%s\n\n%s\n"
  31                "usage:\n"
  32                "  wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] "
  33                "[-g<global ctrl>] \\\n"
  34                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  35                "[-p<driver_param>] \\\n"
  36                "        [-b<br_ifname>] [-f<debug file>] \\\n"
  37                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  38                "[-D<driver>] \\\n"
  39                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
  40                "\n"
  41                "drivers:\n",
  42                wpa_supplicant_version, wpa_supplicant_license);
  43
  44         for (i = 0; wpa_supplicant_drivers[i]; i++) {
  45                 printf("  %s = %s\n",
  46                        wpa_supplicant_drivers[i]->name,
  47                        wpa_supplicant_drivers[i]->desc);
  48         }
  49
  50 #ifndef CONFIG_NO_STDOUT_DEBUG
  51         printf("options:\n"
  52                "  -b = optional bridge interface name\n"
  53                "  -B = run daemon in the background\n"
  54                "  -c = Configuration file\n"
  55                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  56                "  -i = interface name\n"
  57                "  -d = increase debugging verbosity (-dd even more)\n"
  58                "  -D = driver name (can be multiple drivers: nl80211,wext)\n");
  59 #ifdef CONFIG_DEBUG_FILE
  60         printf("  -f = log output to debug file instead of stdout\n");
  61 #endif /* CONFIG_DEBUG_FILE */
  62         printf("  -g = global ctrl_interface\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         printf("  -t = include timestamp in debug messages\n"
  68                "  -h = show this help text\n"
  69                "  -L = show license (GPL and BSD)\n"
  70                "  -p = driver parameters\n"
  71                "  -P = PID file\n"
  72                "  -q = decrease debugging verbosity (-qq even less)\n");
  73 #ifdef CONFIG_CTRL_IFACE_DBUS
  74         printf("  -u = enable DBus control interface\n");
  75 #endif /* CONFIG_CTRL_IFACE_DBUS */
  76         printf("  -v = show version\n"
  77                "  -W = wait for a control interface monitor before starting\n"
  78                "  -N = start describing new interface\n");
  79
  80         printf("example:\n"
  81                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
  82                wpa_supplicant_drivers[i] ?
  83                    wpa_supplicant_drivers[i]->name : "wext");
  84 #endif /* CONFIG_NO_STDOUT_DEBUG */
  85 }
  86
  87
  88 static void license(void)
  89 {
  90 #ifndef CONFIG_NO_STDOUT_DEBUG
  91         printf("%s\n\n%s%s%s%s%s\n",
  92                wpa_supplicant_version,
  93                wpa_supplicant_full_license1,
  94                wpa_supplicant_full_license2,
  95                wpa_supplicant_full_license3,
  96                wpa_supplicant_full_license4,
  97                wpa_supplicant_full_license5);
  98 #endif /* CONFIG_NO_STDOUT_DEBUG */
  99 }
 100
 101
 102 static void wpa_supplicant_fd_workaround(void)
 103 {
 104 #ifdef __linux__
 105         int s, i;
 106         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 107          * fd 0, 1, and 2 closed. This will cause some issues because many
 108          * places in wpa_supplicant are still printing out to stdout. As a
 109          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 110          * sockets. */
 111         for (i = 0; i < 3; i++) {
 112                 s = open("/dev/null", O_RDWR);
 113                 if (s > 2) {
 114                         close(s);
 115                         break;
 116                 }
 117         }
 118 #endif /* __linux__ */
 119 }
 120
 121
 122 int main(int argc, char *argv[])
 123 {
 124         int c, i;
 125         struct wpa_interface *ifaces, *iface;
 126         int iface_count, exitcode = -1;
 127         struct wpa_params params;
 128         struct wpa_global *global;
 129
 130         if (os_program_init())
 131                 return -1;
 132
 133         os_memset(&params, 0, sizeof(params));
 134         params.wpa_debug_level = MSG_INFO;
 135
 136         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 137         if (ifaces == NULL)
 138                 return -1;
 139         iface_count = 1;
 140
 141         wpa_supplicant_fd_workaround();
 142
 143         for (;;) {
 144                 c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qstuvW");
 145                 if (c < 0)
 146                         break;
 147                 switch (c) {
 148                 case 'b':
 149                         iface->bridge_ifname = optarg;
 150                         break;
 151                 case 'B':
 152                         params.daemonize++;
 153                         break;
 154                 case 'c':
 155                         iface->confname = optarg;
 156                         break;
 157                 case 'C':
 158                         iface->ctrl_interface = optarg;
 159                         break;
 160                 case 'D':
 161                         iface->driver = optarg;
 162                         break;
 163                 case 'd':
 164 #ifdef CONFIG_NO_STDOUT_DEBUG
 165                         printf("Debugging disabled with "
 166                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 167                                "option.\n");
 168                         goto out;
 169 #else /* CONFIG_NO_STDOUT_DEBUG */
 170                         params.wpa_debug_level--;
 171                         break;
 172 #endif /* CONFIG_NO_STDOUT_DEBUG */
 173 #ifdef CONFIG_DEBUG_FILE
 174                 case 'f':
 175                         params.wpa_debug_file_path = optarg;
 176                         break;
 177 #endif /* CONFIG_DEBUG_FILE */
 178                 case 'g':
 179                         params.ctrl_interface = optarg;
 180                         break;
 181                 case 'h':
 182                         usage();
 183                         exitcode = 0;
 184                         goto out;
 185                 case 'i':
 186                         iface->ifname = optarg;
 187                         break;
 188                 case 'K':
 189                         params.wpa_debug_show_keys++;
 190                         break;
 191                 case 'L':
 192                         license();
 193                         exitcode = 0;
 194                         goto out;
 195                 case 'p':
 196                         iface->driver_param = optarg;
 197                         break;
 198                 case 'P':
 199                         os_free(params.pid_file);
 200                         params.pid_file = os_rel2abs_path(optarg);
 201                         break;
 202                 case 'q':
 203                         params.wpa_debug_level++;
 204                         break;
 205 #ifdef CONFIG_DEBUG_SYSLOG
 206                 case 's':
 207                         params.wpa_debug_syslog++;
 208                         break;
 209 #endif /* CONFIG_DEBUG_SYSLOG */
 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 }