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 static void usage(void)
  25 {
  26         int i;
  27         printf("%s\n\n%s\n"
  28                "usage:\n"
  29                "  wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] "
  30                "[-g<global ctrl>] \\\n"
  31                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  32                "[-p<driver_param>] \\\n"
  33                "        [-b<br_ifname>] [-f<debug file>] \\\n"
  34                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  35                "[-D<driver>] \\\n"
  36                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
  37                "\n"
  38                "drivers:\n",
  39                wpa_supplicant_version, wpa_supplicant_license);
  40
  41         for (i = 0; wpa_supplicant_drivers[i]; i++) {
  42                 printf("  %s = %s\n",
  43                        wpa_supplicant_drivers[i]->name,
  44                        wpa_supplicant_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                "  -d = increase debugging verbosity (-dd even more)\n"
  55                "  -D = driver name (can be multiple drivers: nl80211,wext)\n");
  56 #ifdef CONFIG_DEBUG_FILE
  57         printf("  -f = log output to debug file instead of stdout\n");
  58 #endif /* CONFIG_DEBUG_FILE */
  59         printf("  -g = global ctrl_interface\n"
  60                "  -K = include keys (passwords, etc.) in debug output\n");
  61 #ifdef CONFIG_DEBUG_SYSLOG
  62         printf("  -s = log output to syslog instead of stdout\n");
  63 #endif /* CONFIG_DEBUG_SYSLOG */
  64         printf("  -t = include timestamp in debug messages\n"
  65                "  -h = show this help text\n"
  66                "  -L = show license (GPL and BSD)\n"
  67                "  -p = driver parameters\n"
  68                "  -P = PID file\n"
  69                "  -q = decrease debugging verbosity (-qq even less)\n");
  70 #ifdef CONFIG_CTRL_IFACE_DBUS
  71         printf("  -u = enable DBus control interface\n");
  72 #endif /* CONFIG_CTRL_IFACE_DBUS */
  73         printf("  -v = show version\n"
  74                "  -W = wait for a control interface monitor before starting\n"
  75                "  -N = start describing new interface\n");
  76
  77         printf("example:\n"
  78                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
  79                wpa_supplicant_drivers[i] ?
  80                    wpa_supplicant_drivers[i]->name : "wext");
  81 #endif /* CONFIG_NO_STDOUT_DEBUG */
  82 }
  83
  84
  85 static void license(void)
  86 {
  87 #ifndef CONFIG_NO_STDOUT_DEBUG
  88         printf("%s\n\n%s%s%s%s%s\n",
  89                wpa_supplicant_version,
  90                wpa_supplicant_full_license1,
  91                wpa_supplicant_full_license2,
  92                wpa_supplicant_full_license3,
  93                wpa_supplicant_full_license4,
  94                wpa_supplicant_full_license5);
  95 #endif /* CONFIG_NO_STDOUT_DEBUG */
  96 }
  97
  98
  99 static void wpa_supplicant_fd_workaround(void)
 100 {
 101 #ifdef __linux__
 102         int s, i;
 103         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 104          * fd 0, 1, and 2 closed. This will cause some issues because many
 105          * places in wpa_supplicant are still printing out to stdout. As a
 106          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 107          * sockets. */
 108         for (i = 0; i < 3; i++) {
 109                 s = open("/dev/null", O_RDWR);
 110                 if (s > 2) {
 111                         close(s);
 112                         break;
 113                 }
 114         }
 115 #endif /* __linux__ */
 116 }
 117
 118
 119 int main(int argc, char *argv[])
 120 {
 121         int c, i;
 122         struct wpa_interface *ifaces, *iface;
 123         int iface_count, exitcode = -1;
 124         struct wpa_params params;
 125         struct wpa_global *global;
 126
 127         if (os_program_init())
 128                 return -1;
 129
 130         os_memset(&params, 0, sizeof(params));
 131         params.wpa_debug_level = MSG_INFO;
 132
 133         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 134         if (ifaces == NULL)
 135                 return -1;
 136         iface_count = 1;
 137
 138         wpa_supplicant_fd_workaround();
 139
 140         for (;;) {
 141                 c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qstuvW");
 142                 if (c < 0)
 143                         break;
 144                 switch (c) {
 145                 case 'b':
 146                         iface->bridge_ifname = optarg;
 147                         break;
 148                 case 'B':
 149                         params.daemonize++;
 150                         break;
 151                 case 'c':
 152                         iface->confname = optarg;
 153                         break;
 154                 case 'C':
 155                         iface->ctrl_interface = optarg;
 156                         break;
 157                 case 'D':
 158                         iface->driver = optarg;
 159                         break;
 160                 case 'd':
 161 #ifdef CONFIG_NO_STDOUT_DEBUG
 162                         printf("Debugging disabled with "
 163                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 164                                "option.\n");
 165                         goto out;
 166 #else /* CONFIG_NO_STDOUT_DEBUG */
 167                         params.wpa_debug_level--;
 168                         break;
 169 #endif /* CONFIG_NO_STDOUT_DEBUG */
 170 #ifdef CONFIG_DEBUG_FILE
 171                 case 'f':
 172                         params.wpa_debug_file_path = optarg;
 173                         break;
 174 #endif /* CONFIG_DEBUG_FILE */
 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 #ifdef CONFIG_DEBUG_SYSLOG
 203                 case 's':
 204                         params.wpa_debug_syslog++;
 205                         break;
 206 #endif /* CONFIG_DEBUG_SYSLOG */
 207                 case 't':
 208                         params.wpa_debug_timestamp++;
 209                         break;
 210 #ifdef CONFIG_CTRL_IFACE_DBUS
 211                 case 'u':
 212                         params.dbus_ctrl_interface = 1;
 213                         break;
 214 #endif /* CONFIG_CTRL_IFACE_DBUS */
 215                 case 'v':
 216                         printf("%s\n", wpa_supplicant_version);
 217                         exitcode = 0;
 218                         goto out;
 219                 case 'W':
 220                         params.wait_for_monitor++;
 221                         break;
 222                 case 'N':
 223                         iface_count++;
 224                         iface = os_realloc(ifaces, iface_count *
 225                                            sizeof(struct wpa_interface));
 226                         if (iface == NULL)
 227                                 goto out;
 228                         ifaces = iface;
 229                         iface = &ifaces[iface_count - 1];
 230                         os_memset(iface, 0, sizeof(*iface));
 231                         break;
 232                 default:
 233                         usage();
 234                         exitcode = 0;
 235                         goto out;
 236                 }
 237         }
 238
 239         exitcode = 0;
 240         global = wpa_supplicant_init(&params);
 241         if (global == NULL) {
 242                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 243                 exitcode = -1;
 244                 goto out;
 245         }
 246
 247         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 248                 if ((ifaces[i].confname == NULL &&
 249                      ifaces[i].ctrl_interface == NULL) ||
 250                     ifaces[i].ifname == NULL) {
 251                         if (iface_count == 1 && (params.ctrl_interface ||
 252                                                  params.dbus_ctrl_interface))
 253                                 break;
 254                         usage();
 255                         exitcode = -1;
 256                         break;
 257                 }
 258                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 259                         exitcode = -1;
 260         }
 261
 262         if (exitcode == 0)
 263                 exitcode = wpa_supplicant_run(global);
 264
 265         wpa_supplicant_deinit(global);
 266
 267 out:
 268         os_free(ifaces);
 269         os_free(params.pid_file);
 270
 271         os_program_deinit();
 272
 273         return exitcode;
 274 }