contrib/wpa_supplicant-0.4.9/main.c

   1 /*
   2  * WPA Supplicant / main() function for UNIX like OSes and MinGW
   3  * Copyright (c) 2003-2005, Jouni Malinen <jkmaline@cc.hut.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 <stdlib.h>
  16 #include <stdio.h>
  17 #include <unistd.h>
  18 #include <string.h>
  19 #include <fcntl.h>
  20
  21 #include "common.h"
  22 #include "wpa_supplicant_i.h"
  23
  24
  25 extern const char *wpa_supplicant_version;
  26 extern const char *wpa_supplicant_license;
  27 #ifndef CONFIG_NO_STDOUT_DEBUG
  28 extern const char *wpa_supplicant_full_license;
  29 #endif /* CONFIG_NO_STDOUT_DEBUG */
  30
  31 extern struct wpa_driver_ops *wpa_supplicant_drivers[];
  32
  33
  34 static void usage(void)
  35 {
  36         int i;
  37         printf("%s\n\n%s\n"
  38                "usage:\n"
  39                "  wpa_supplicant [-BddehLqqvwW] [-P<pid file>] "
  40                "[-g<global ctrl>] \\\n"
  41                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  42                "[-p<driver_param>] \\\n"
  43                "        [-N -i<ifname> -c<conf> [-C<ctrl>] [-D<driver>] "
  44                "[-p<driver_param>] ...]\n"
  45                "\n"
  46                "drivers:\n",
  47                wpa_supplicant_version, wpa_supplicant_license);
  48
  49         for (i = 0; wpa_supplicant_drivers[i]; i++) {
  50                 printf("  %s = %s\n",
  51                        wpa_supplicant_drivers[i]->name,
  52                        wpa_supplicant_drivers[i]->desc);
  53         }
  54
  55 #ifndef CONFIG_NO_STDOUT_DEBUG
  56         printf("options:\n"
  57                "  -B = run daemon in the background\n"
  58                "  -c = Configuration file\n"
  59                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  60                "  -i = interface name\n"
  61                "  -d = increase debugging verbosity (-dd even more)\n"
  62                "  -D = driver name\n"
  63                "  -g = global ctrl_interface\n"
  64                "  -K = include keys (passwords, etc.) in debug output\n"
  65                "  -t = include timestamp in debug messages\n"
  66                "  -h = show this help text\n"
  67                "  -L = show license (GPL and BSD)\n"
  68                "  -p = driver parameters\n"
  69                "  -P = PID file\n"
  70                "  -q = decrease debugging verbosity (-qq even less)\n"
  71                "  -v = show version\n"
  72                "  -w = wait for interface to be added, if needed\n"
  73                "  -W = wait for a control interface monitor before starting\n"
  74                "  -N = start describing new interface\n");
  75
  76         printf("example:\n"
  77                "  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
  78 #endif /* CONFIG_NO_STDOUT_DEBUG */
  79 }
  80
  81
  82 static void license(void)
  83 {
  84 #ifndef CONFIG_NO_STDOUT_DEBUG
  85         printf("%s\n\n%s\n",
  86                wpa_supplicant_version, wpa_supplicant_full_license);
  87 #endif /* CONFIG_NO_STDOUT_DEBUG */
  88 }
  89
  90
  91 static void wpa_supplicant_fd_workaround(void)
  92 {
  93         int s, i;
  94         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
  95          * fd 0, 1, and 2 closed. This will cause some issues because many
  96          * places in wpa_supplicant are still printing out to stdout. As a
  97          * workaround, make sure that fd's 0, 1, and 2 are not used for other
  98          * sockets. */
  99         for (i = 0; i < 3; i++) {
 100                 s = open("/dev/null", O_RDWR);
 101                 if (s > 2) {
 102                         close(s);
 103                         break;
 104                 }
 105         }
 106 }
 107
 108
 109 int main(int argc, char *argv[])
 110 {
 111         int c, i;
 112         struct wpa_interface *ifaces, *iface;
 113         int iface_count, exitcode = -1;
 114         struct wpa_params params;
 115         struct wpa_global *global;
 116
 117 #ifdef CONFIG_NATIVE_WINDOWS
 118         WSADATA wsaData;
 119         if (WSAStartup(MAKEWORD(2, 0), &wsaData)) {
 120                 printf("Could not find a usable WinSock.dll\n");
 121                 return -1;
 122         }
 123 #endif /* CONFIG_NATIVE_WINDOWS */
 124
 125         memset(&params, 0, sizeof(params));
 126         params.wpa_debug_level = MSG_INFO;
 127
 128         iface = ifaces = malloc(sizeof(struct wpa_interface));
 129         if (ifaces == NULL)
 130                 return -1;
 131         memset(iface, 0, sizeof(*iface));
 132         iface_count = 1;
 133
 134         wpa_supplicant_fd_workaround();
 135
 136         for (;;) {
 137                 c = getopt(argc, argv, "Bc:C:D:dg:hi:KLNp:P:qtvwW");
 138                 if (c < 0)
 139                         break;
 140                 switch (c) {
 141                 case 'B':
 142                         params.daemonize++;
 143                         break;
 144                 case 'c':
 145                         iface->confname = optarg;
 146                         break;
 147                 case 'C':
 148                         iface->ctrl_interface = optarg;
 149                         break;
 150                 case 'D':
 151                         iface->driver = optarg;
 152                         break;
 153                 case 'd':
 154 #ifdef CONFIG_NO_STDOUT_DEBUG
 155                         printf("Debugging disabled with "
 156                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 157                                "option.\n");
 158                         goto out;
 159 #else /* CONFIG_NO_STDOUT_DEBUG */
 160                         params.wpa_debug_level--;
 161                         break;
 162 #endif /* CONFIG_NO_STDOUT_DEBUG */
 163                 case 'g':
 164                         params.ctrl_interface = optarg;
 165                         break;
 166                 case 'h':
 167                         usage();
 168                         goto out;
 169                 case 'i':
 170                         iface->ifname = optarg;
 171                         break;
 172                 case 'K':
 173                         params.wpa_debug_show_keys++;
 174                         break;
 175                 case 'L':
 176                         license();
 177                         goto out;
 178                 case 'p':
 179                         iface->driver_param = optarg;
 180                         break;
 181                 case 'P':
 182                         params.pid_file = rel2abs_path(optarg);
 183                         break;
 184                 case 'q':
 185                         params.wpa_debug_level++;
 186                         break;
 187                 case 't':
 188                         params.wpa_debug_timestamp++;
 189                         break;
 190                 case 'v':
 191                         printf("%s\n", wpa_supplicant_version);
 192                         goto out;
 193                 case 'w':
 194                         params.wait_for_interface++;
 195                         break;
 196                 case 'W':
 197                         params.wait_for_monitor++;
 198                         break;
 199                 case 'N':
 200                         iface_count++;
 201                         iface = realloc(ifaces, iface_count *
 202                                         sizeof(struct wpa_interface));
 203                         if (iface == NULL)
 204                                 goto out;
 205                         ifaces = iface;
 206                         iface = &ifaces[iface_count - 1];
 207                         memset(iface, 0, sizeof(*iface));
 208                         break;
 209                 default:
 210                         usage();
 211                         goto out;
 212                 }
 213         }
 214
 215         exitcode = 0;
 216         global = wpa_supplicant_init(&params);
 217         if (global == NULL) {
 218                 printf("Failed to initialize wpa_supplicant\n");
 219                 exitcode = -1;
 220         }
 221
 222         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 223                 if ((ifaces[i].confname == NULL &&
 224                      ifaces[i].ctrl_interface == NULL) ||
 225                     ifaces[i].ifname == NULL) {
 226                         if (iface_count == 1 && params.ctrl_interface)
 227                                 break;
 228                         usage();
 229                         exitcode = -1;
 230                         break;
 231                 }
 232                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
 233                         exitcode = -1;
 234         }
 235
 236         if (exitcode == 0)
 237                 exitcode = wpa_supplicant_run(global);
 238
 239         wpa_supplicant_deinit(global);
 240
 241 out:
 242         free(ifaces);
 243         free(params.pid_file);
 244
 245 #ifdef CONFIG_NATIVE_WINDOWS
 246         WSACleanup();
 247 #endif /* CONFIG_NATIVE_WINDOWS */
 248
 249         return exitcode;
 250 }