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(¶ms, 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(¶ms); 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 } 286