contrib/wpa_supplicant/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 [-BddhKLqqtuvW] [-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\n"
  56 #ifdef CONFIG_DEBUG_FILE
  57                "  -f = log output to debug file instead of stdout\n"
  58 #endif /* CONFIG_DEBUG_FILE */
  59                "  -g = global ctrl_interface\n"
  60                "  -K = include keys (passwords, etc.) in debug output\n"
  61                "  -t = include timestamp in debug messages\n"
  62                "  -h = show this help text\n"
  63                "  -L = show license (GPL and BSD)\n");
  64         printf("  -p = driver parameters\n"
  65                "  -P = PID file\n"
  66                "  -q = decrease debugging verbosity (-qq even less)\n"
  67 #ifdef CONFIG_CTRL_IFACE_DBUS
  68                "  -u = enable DBus control interface\n"
  69 #endif /* CONFIG_CTRL_IFACE_DBUS */
  70                "  -v = show version\n"
  71                "  -W = wait for a control interface monitor before starting\n"
  72                "  -N = start describing new interface\n");
  73
  74         printf("example:\n"
  75                "  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
  76 #endif /* CONFIG_NO_STDOUT_DEBUG */
  77 }
  78
  79
  80 static void license(void)
  81 {
  82 #ifndef CONFIG_NO_STDOUT_DEBUG
  83         printf("%s\n\n%s%s%s%s%s\n",
  84                wpa_supplicant_version,
  85                wpa_supplicant_full_license1,
  86                wpa_supplicant_full_license2,
  87                wpa_supplicant_full_license3,
  88                wpa_supplicant_full_license4,
  89                wpa_supplicant_full_license5);
  90 #endif /* CONFIG_NO_STDOUT_DEBUG */
  91 }
  92
  93
  94 static void wpa_supplicant_fd_workaround(void)
  95 {
  96 #ifdef __linux__
  97         int s, i;
  98         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
  99          * fd 0, 1, and 2 closed. This will cause some issues because many
 100          * places in wpa_supplicant are still printing out to stdout. As a
 101          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 102          * sockets. */
 103         for (i = 0; i < 3; i++) {
 104                 s = open("/dev/null", O_RDWR);
 105                 if (s > 2) {
 106                         close(s);
 107                         break;
 108                 }
 109         }
 110 #endif /* __linux__ */
 111 }
 112
 113
 114 int main(int argc, char *argv[])
 115 {
 116         int c, i;
 117         struct wpa_interface *ifaces, *iface;
 118         int iface_count, exitcode = -1;
 119         struct wpa_params params;
 120         struct wpa_global *global;
 121
 122         if (os_program_init())
 123                 return -1;
 124
 125         os_memset(&params, 0, sizeof(params));
 126         params.wpa_debug_level = MSG_INFO;
 127
 128         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 129         if (ifaces == NULL)
 130                 return -1;
 131         iface_count = 1;
 132
 133         wpa_supplicant_fd_workaround();
 134
 135         for (;;) {
 136                 c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qtuvW");
 137                 if (c < 0)
 138                         break;
 139                 switch (c) {
 140                 case 'b':
 141                         iface->bridge_ifname = optarg;
 142                         break;
 143                 case 'B':
 144                         params.daemonize++;
 145                         break;
 146                 case 'c':
 147                         iface->confname = optarg;
 148                         break;
 149                 case 'C':
 150                         iface->ctrl_interface = optarg;
 151                         break;
 152                 case 'D':
 153                         iface->driver = optarg;
 154                         break;
 155                 case 'd':
 156 #ifdef CONFIG_NO_STDOUT_DEBUG
 157                         printf("Debugging disabled with "
 158                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 159                                "option.\n");
 160                         goto out;
 161 #else /* CONFIG_NO_STDOUT_DEBUG */
 162                         params.wpa_debug_level--;
 163                         break;
 164 #endif /* CONFIG_NO_STDOUT_DEBUG */
 165 #ifdef CONFIG_DEBUG_FILE
 166                 case 'f':
 167                         params.wpa_debug_file_path = optarg;
 168                         break;
 169 #endif /* CONFIG_DEBUG_FILE */
 170                 case 'g':
 171                         params.ctrl_interface = optarg;
 172                         break;
 173                 case 'h':
 174                         usage();
 175                         exitcode = 0;
 176                         goto out;
 177                 case 'i':
 178                         iface->ifname = optarg;
 179                         break;
 180                 case 'K':
 181                         params.wpa_debug_show_keys++;
 182                         break;
 183                 case 'L':
 184                         license();
 185                         exitcode = 0;
 186                         goto out;
 187                 case 'p':
 188                         iface->driver_param = optarg;
 189                         break;
 190                 case 'P':
 191                         os_free(params.pid_file);
 192                         params.pid_file = os_rel2abs_path(optarg);
 193                         break;
 194                 case 'q':
 195                         params.wpa_debug_level++;
 196                         break;
 197                 case 't':
 198                         params.wpa_debug_timestamp++;
 199                         break;
 200 #ifdef CONFIG_CTRL_IFACE_DBUS
 201                 case 'u':
 202                         params.dbus_ctrl_interface = 1;
 203                         break;
 204 #endif /* CONFIG_CTRL_IFACE_DBUS */
 205                 case 'v':
 206                         printf("%s\n", wpa_supplicant_version);
 207                         exitcode = 0;
 208                         goto out;
 209                 case 'W':
 210                         params.wait_for_monitor++;
 211                         break;
 212                 case 'N':
 213                         iface_count++;
 214                         iface = os_realloc(ifaces, iface_count *
 215                                            sizeof(struct wpa_interface));
 216                         if (iface == NULL)
 217                                 goto out;
 218                         ifaces = iface;
 219                         iface = &ifaces[iface_count - 1];
 220                         os_memset(iface, 0, sizeof(*iface));
 221                         break;
 222                 default:
 223                         usage();
 224                         exitcode = 0;
 225                         goto out;
 226                 }
 227         }
 228
 229         exitcode = 0;
 230         global = wpa_supplicant_init(&params);
 231         if (global == NULL) {
 232                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 233                 exitcode = -1;
 234                 goto out;
 235         }
 236
 237         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 238                 if ((ifaces[i].confname == NULL &&
 239                      ifaces[i].ctrl_interface == NULL) ||
 240                     ifaces[i].ifname == NULL) {
 241                         if (iface_count == 1 && (params.ctrl_interface ||
 242                                                  params.dbus_ctrl_interface))
 243                                 break;
 244                         usage();
 245                         exitcode = -1;
 246                         break;
 247                 }
 248                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 249                         exitcode = -1;
 250         }
 251
 252         if (exitcode == 0)
 253                 exitcode = wpa_supplicant_run(global);
 254
 255         wpa_supplicant_deinit(global);
 256
 257 out:
 258         os_free(ifaces);
 259         os_free(params.pid_file);
 260
 261         os_program_deinit();
 262
 263         return exitcode;
 264 }