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_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                "        [-o<override driver>] [-O<override ctrl>] \\\n"
  38                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  39                "[-D<driver>] \\\n"
  40                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
  41                "\n"
  42                "drivers:\n",
  43                wpa_supplicant_version, wpa_supplicant_license);
  44
  45         for (i = 0; wpa_drivers[i]; i++) {
  46                 printf("  %s = %s\n",
  47                        wpa_drivers[i]->name,
  48                        wpa_drivers[i]->desc);
  49         }
  50
  51 #ifndef CONFIG_NO_STDOUT_DEBUG
  52         printf("options:\n"
  53                "  -b = optional bridge interface name\n"
  54                "  -B = run daemon in the background\n"
  55                "  -c = Configuration file\n"
  56                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  57                "  -i = interface name\n"
  58                "  -d = increase debugging verbosity (-dd even more)\n"
  59                "  -D = driver name (can be multiple drivers: nl80211,wext)\n");
  60 #ifdef CONFIG_DEBUG_FILE
  61         printf("  -f = log output to debug file instead of stdout\n");
  62 #endif /* CONFIG_DEBUG_FILE */
  63         printf("  -g = global ctrl_interface\n"
  64                "  -K = include keys (passwords, etc.) in debug output\n");
  65 #ifdef CONFIG_DEBUG_SYSLOG
  66         printf("  -s = log output to syslog instead of stdout\n");
  67 #endif /* CONFIG_DEBUG_SYSLOG */
  68         printf("  -t = include timestamp in debug messages\n"
  69                "  -h = show this help text\n"
  70                "  -L = show license (GPL and BSD)\n"
  71                "  -o = override driver parameter for new interfaces\n"
  72                "  -O = override ctrl_interface parameter for new interfaces\n"
  73                "  -p = driver parameters\n"
  74                "  -P = PID file\n"
  75                "  -q = decrease debugging verbosity (-qq even less)\n");
  76 #ifdef CONFIG_DBUS
  77         printf("  -u = enable DBus control interface\n");
  78 #endif /* CONFIG_DBUS */
  79         printf("  -v = show version\n"
  80                "  -W = wait for a control interface monitor before starting\n"
  81                "  -N = start describing new interface\n");
  82
  83         printf("example:\n"
  84                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
  85                wpa_drivers[i] ? wpa_drivers[i]->name : "wext");
  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:df:g:hi:KLNo:O:p:P:qstuvW");
 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 #ifdef CONFIG_DEBUG_FILE
 176                 case 'f':
 177                         params.wpa_debug_file_path = optarg;
 178                         break;
 179 #endif /* CONFIG_DEBUG_FILE */
 180                 case 'g':
 181                         params.ctrl_interface = optarg;
 182                         break;
 183                 case 'h':
 184                         usage();
 185                         exitcode = 0;
 186                         goto out;
 187                 case 'i':
 188                         iface->ifname = optarg;
 189                         break;
 190                 case 'K':
 191                         params.wpa_debug_show_keys++;
 192                         break;
 193                 case 'L':
 194                         license();
 195                         exitcode = 0;
 196                         goto out;
 197                 case 'o':
 198                         params.override_driver = optarg;
 199                         break;
 200                 case 'O':
 201                         params.override_ctrl_interface = optarg;
 202                         break;
 203                 case 'p':
 204                         iface->driver_param = optarg;
 205                         break;
 206                 case 'P':
 207                         os_free(params.pid_file);
 208                         params.pid_file = os_rel2abs_path(optarg);
 209                         break;
 210                 case 'q':
 211                         params.wpa_debug_level++;
 212                         break;
 213 #ifdef CONFIG_DEBUG_SYSLOG
 214                 case 's':
 215                         params.wpa_debug_syslog++;
 216                         break;
 217 #endif /* CONFIG_DEBUG_SYSLOG */
 218                 case 't':
 219                         params.wpa_debug_timestamp++;
 220                         break;
 221 #ifdef CONFIG_DBUS
 222                 case 'u':
 223                         params.dbus_ctrl_interface = 1;
 224                         break;
 225 #endif /* CONFIG_DBUS */
 226                 case 'v':
 227                         printf("%s\n", wpa_supplicant_version);
 228                         exitcode = 0;
 229                         goto out;
 230                 case 'W':
 231                         params.wait_for_monitor++;
 232                         break;
 233                 case 'N':
 234                         iface_count++;
 235                         iface = os_realloc(ifaces, iface_count *
 236                                            sizeof(struct wpa_interface));
 237                         if (iface == NULL)
 238                                 goto out;
 239                         ifaces = iface;
 240                         iface = &ifaces[iface_count - 1];
 241                         os_memset(iface, 0, sizeof(*iface));
 242                         break;
 243                 default:
 244                         usage();
 245                         exitcode = 0;
 246                         goto out;
 247                 }
 248         }
 249
 250         exitcode = 0;
 251         global = wpa_supplicant_init(&params);
 252         if (global == NULL) {
 253                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 254                 exitcode = -1;
 255                 goto out;
 256         }
 257
 258         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 259                 if ((ifaces[i].confname == NULL &&
 260                      ifaces[i].ctrl_interface == NULL) ||
 261                     ifaces[i].ifname == NULL) {
 262                         if (iface_count == 1 && (params.ctrl_interface ||
 263                                                  params.dbus_ctrl_interface))
 264                                 break;
 265                         usage();
 266                         exitcode = -1;
 267                         break;
 268                 }
 269                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 270                         exitcode = -1;
 271         }
 272
 273         if (exitcode == 0)
 274                 exitcode = wpa_supplicant_run(global);
 275
 276         wpa_supplicant_deinit(global);
 277
 278 out:
 279         os_free(ifaces);
 280         os_free(params.pid_file);
 281
 282         os_program_deinit();
 283
 284         return exitcode;
 285 }