1 /* 2 * WPA Supplicant / main() function for UNIX like OSes and MinGW 3 * Copyright (c) 2003-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 #ifdef __linux__ 11 #include <fcntl.h> 12 #endif /* __linux__ */ 13 14 #include "common.h" 15 #include "fst/fst.h" 16 #include "wpa_supplicant_i.h" 17 #include "driver_i.h" 18 #include "p2p_supplicant.h" 19 20 21 static void usage(void) 22 { 23 int i; 24 printf("%s\n\n%s\n" 25 "usage:\n" 26 " wpa_supplicant [-BddhKLqq" 27 #ifdef CONFIG_DEBUG_SYSLOG 28 "s" 29 #endif /* CONFIG_DEBUG_SYSLOG */ 30 "t" 31 #ifdef CONFIG_DBUS 32 "u" 33 #endif /* CONFIG_DBUS */ 34 "vW] [-P<pid file>] " 35 "[-g<global ctrl>] \\\n" 36 " [-G<group>] \\\n" 37 " -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] " 38 "[-p<driver_param>] \\\n" 39 " [-b<br_ifname>] [-e<entropy file>]" 40 #ifdef CONFIG_DEBUG_FILE 41 " [-f<debug file>]" 42 #endif /* CONFIG_DEBUG_FILE */ 43 " \\\n" 44 " [-o<override driver>] [-O<override ctrl>] \\\n" 45 " [-N -i<ifname> -c<conf> [-C<ctrl>] " 46 "[-D<driver>] \\\n" 47 #ifdef CONFIG_P2P 48 " [-m<P2P Device config file>] \\\n" 49 #endif /* CONFIG_P2P */ 50 " [-p<driver_param>] [-b<br_ifname>] [-I<config file>] " 51 "...]\n" 52 "\n" 53 "drivers:\n", 54 wpa_supplicant_version, wpa_supplicant_license); 55 56 for (i = 0; wpa_drivers[i]; i++) { 57 printf(" %s = %s\n", 58 wpa_drivers[i]->name, 59 wpa_drivers[i]->desc); 60 } 61 62 #ifndef CONFIG_NO_STDOUT_DEBUG 63 printf("options:\n" 64 " -b = optional bridge interface name\n" 65 " -B = run daemon in the background\n" 66 " -c = Configuration file\n" 67 " -C = ctrl_interface parameter (only used if -c is not)\n" 68 " -i = interface name\n" 69 " -I = additional configuration file\n" 70 " -d = increase debugging verbosity (-dd even more)\n" 71 " -D = driver name (can be multiple drivers: nl80211,wext)\n" 72 " -e = entropy file\n"); 73 #ifdef CONFIG_DEBUG_FILE 74 printf(" -f = log output to debug file instead of stdout\n"); 75 #endif /* CONFIG_DEBUG_FILE */ 76 printf(" -g = global ctrl_interface\n" 77 " -G = global ctrl_interface group\n" 78 " -K = include keys (passwords, etc.) in debug output\n"); 79 #ifdef CONFIG_DEBUG_SYSLOG 80 printf(" -s = log output to syslog instead of stdout\n"); 81 #endif /* CONFIG_DEBUG_SYSLOG */ 82 #ifdef CONFIG_DEBUG_LINUX_TRACING 83 printf(" -T = record to Linux tracing in addition to logging\n"); 84 printf(" (records all messages regardless of debug verbosity)\n"); 85 #endif /* CONFIG_DEBUG_LINUX_TRACING */ 86 printf(" -t = include timestamp in debug messages\n" 87 " -h = show this help text\n" 88 " -L = show license (BSD)\n" 89 " -o = override driver parameter for new interfaces\n" 90 " -O = override ctrl_interface parameter for new interfaces\n" 91 " -p = driver parameters\n" 92 " -P = PID file\n" 93 " -q = decrease debugging verbosity (-qq even less)\n"); 94 #ifdef CONFIG_DBUS 95 printf(" -u = enable DBus control interface\n"); 96 #endif /* CONFIG_DBUS */ 97 printf(" -v = show version\n" 98 " -W = wait for a control interface monitor before starting\n" 99 #ifdef CONFIG_P2P 100 " -m = Configuration file for the P2P Device interface\n" 101 #endif /* CONFIG_P2P */ 102 " -N = start describing new interface\n"); 103 104 printf("example:\n" 105 " wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n", 106 wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211"); 107 #endif /* CONFIG_NO_STDOUT_DEBUG */ 108 } 109 110 111 static void license(void) 112 { 113 #ifndef CONFIG_NO_STDOUT_DEBUG 114 printf("%s\n\n%s%s%s%s%s\n", 115 wpa_supplicant_version, 116 wpa_supplicant_full_license1, 117 wpa_supplicant_full_license2, 118 wpa_supplicant_full_license3, 119 wpa_supplicant_full_license4, 120 wpa_supplicant_full_license5); 121 #endif /* CONFIG_NO_STDOUT_DEBUG */ 122 } 123 124 125 static void wpa_supplicant_fd_workaround(int start) 126 { 127 #ifdef __linux__ 128 static int fd[3] = { -1, -1, -1 }; 129 int i; 130 /* When started from pcmcia-cs scripts, wpa_supplicant might start with 131 * fd 0, 1, and 2 closed. This will cause some issues because many 132 * places in wpa_supplicant are still printing out to stdout. As a 133 * workaround, make sure that fd's 0, 1, and 2 are not used for other 134 * sockets. */ 135 if (start) { 136 for (i = 0; i < 3; i++) { 137 fd[i] = open("/dev/null", O_RDWR); 138 if (fd[i] > 2) { 139 close(fd[i]); 140 fd[i] = -1; 141 break; 142 } 143 } 144 } else { 145 for (i = 0; i < 3; i++) { 146 if (fd[i] >= 0) { 147 close(fd[i]); 148 fd[i] = -1; 149 } 150 } 151 } 152 #endif /* __linux__ */ 153 } 154 155 156 int main(int argc, char *argv[]) 157 { 158 int c, i; 159 struct wpa_interface *ifaces, *iface; 160 int iface_count, exitcode = -1; 161 struct wpa_params params; 162 struct wpa_global *global; 163 164 if (os_program_init()) 165 return -1; 166 167 os_memset(¶ms, 0, sizeof(params)); 168 params.wpa_debug_level = MSG_INFO; 169 170 iface = ifaces = os_zalloc(sizeof(struct wpa_interface)); 171 if (ifaces == NULL) 172 return -1; 173 iface_count = 1; 174 175 wpa_supplicant_fd_workaround(1); 176 177 for (;;) { 178 c = getopt(argc, argv, 179 "b:Bc:C:D:de:f:g:G:hi:I:KLm:No:O:p:P:qsTtuvW"); 180 if (c < 0) 181 break; 182 switch (c) { 183 case 'b': 184 iface->bridge_ifname = optarg; 185 break; 186 case 'B': 187 params.daemonize++; 188 break; 189 case 'c': 190 iface->confname = optarg; 191 break; 192 case 'C': 193 iface->ctrl_interface = optarg; 194 break; 195 case 'D': 196 iface->driver = optarg; 197 break; 198 case 'd': 199 #ifdef CONFIG_NO_STDOUT_DEBUG 200 printf("Debugging disabled with " 201 "CONFIG_NO_STDOUT_DEBUG=y build time " 202 "option.\n"); 203 goto out; 204 #else /* CONFIG_NO_STDOUT_DEBUG */ 205 params.wpa_debug_level--; 206 break; 207 #endif /* CONFIG_NO_STDOUT_DEBUG */ 208 case 'e': 209 params.entropy_file = optarg; 210 break; 211 #ifdef CONFIG_DEBUG_FILE 212 case 'f': 213 params.wpa_debug_file_path = optarg; 214 break; 215 #endif /* CONFIG_DEBUG_FILE */ 216 case 'g': 217 params.ctrl_interface = optarg; 218 break; 219 case 'G': 220 params.ctrl_interface_group = optarg; 221 break; 222 case 'h': 223 usage(); 224 exitcode = 0; 225 goto out; 226 case 'i': 227 iface->ifname = optarg; 228 break; 229 case 'I': 230 iface->confanother = optarg; 231 break; 232 case 'K': 233 params.wpa_debug_show_keys++; 234 break; 235 case 'L': 236 license(); 237 exitcode = 0; 238 goto out; 239 #ifdef CONFIG_P2P 240 case 'm': 241 params.conf_p2p_dev = optarg; 242 break; 243 #endif /* CONFIG_P2P */ 244 case 'o': 245 params.override_driver = optarg; 246 break; 247 case 'O': 248 params.override_ctrl_interface = optarg; 249 break; 250 case 'p': 251 iface->driver_param = optarg; 252 break; 253 case 'P': 254 os_free(params.pid_file); 255 params.pid_file = os_rel2abs_path(optarg); 256 break; 257 case 'q': 258 params.wpa_debug_level++; 259 break; 260 #ifdef CONFIG_DEBUG_SYSLOG 261 case 's': 262 params.wpa_debug_syslog++; 263 break; 264 #endif /* CONFIG_DEBUG_SYSLOG */ 265 #ifdef CONFIG_DEBUG_LINUX_TRACING 266 case 'T': 267 params.wpa_debug_tracing++; 268 break; 269 #endif /* CONFIG_DEBUG_LINUX_TRACING */ 270 case 't': 271 params.wpa_debug_timestamp++; 272 break; 273 #ifdef CONFIG_DBUS 274 case 'u': 275 params.dbus_ctrl_interface = 1; 276 break; 277 #endif /* CONFIG_DBUS */ 278 case 'v': 279 printf("%s\n", wpa_supplicant_version); 280 exitcode = 0; 281 goto out; 282 case 'W': 283 params.wait_for_monitor++; 284 break; 285 case 'N': 286 iface_count++; 287 iface = os_realloc_array(ifaces, iface_count, 288 sizeof(struct wpa_interface)); 289 if (iface == NULL) 290 goto out; 291 ifaces = iface; 292 iface = &ifaces[iface_count - 1]; 293 os_memset(iface, 0, sizeof(*iface)); 294 break; 295 default: 296 usage(); 297 exitcode = 0; 298 goto out; 299 } 300 } 301 302 exitcode = 0; 303 global = wpa_supplicant_init(¶ms); 304 if (global == NULL) { 305 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant"); 306 exitcode = -1; 307 goto out; 308 } else { 309 wpa_printf(MSG_INFO, "Successfully initialized " 310 "wpa_supplicant"); 311 } 312 313 if (fst_global_init()) { 314 wpa_printf(MSG_ERROR, "Failed to initialize FST"); 315 exitcode = -1; 316 goto out; 317 } 318 319 #if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE) 320 if (!fst_global_add_ctrl(fst_ctrl_cli)) 321 wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl"); 322 #endif 323 324 for (i = 0; exitcode == 0 && i < iface_count; i++) { 325 struct wpa_supplicant *wpa_s; 326 327 if ((ifaces[i].confname == NULL && 328 ifaces[i].ctrl_interface == NULL) || 329 ifaces[i].ifname == NULL) { 330 if (iface_count == 1 && (params.ctrl_interface || 331 params.dbus_ctrl_interface)) 332 break; 333 usage(); 334 exitcode = -1; 335 break; 336 } 337 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL); 338 if (wpa_s == NULL) { 339 exitcode = -1; 340 break; 341 } 342 } 343 344 if (exitcode == 0) 345 exitcode = wpa_supplicant_run(global); 346 347 wpa_supplicant_deinit(global); 348 349 fst_global_deinit(); 350 351 out: 352 wpa_supplicant_fd_workaround(0); 353 os_free(ifaces); 354 os_free(params.pid_file); 355 356 os_program_deinit(); 357 358 return exitcode; 359 } 360