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(¶ms, 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(¶ms); 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 } 265