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