1 /* 2 * WPA Supplicant / main() function for UNIX like OSes and MinGW 3 * Copyright (c) 2003-2007, Jouni Malinen <j (at) 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 18 extern struct wpa_driver_ops *wpa_drivers[]; 19 20 21 static void usage(void) 22 { 23 int i; 24 printf("%s\n\n%s\n" 25 "usage:\n" 26 " wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] " 27 "[-g<global ctrl>] \\\n" 28 " -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] " 29 "[-p<driver_param>] \\\n" 30 " [-b<br_ifname>] [-f<debug file>] [-e<entropy file>] " 31 "\\\n" 32 " [-o<override driver>] [-O<override ctrl>] \\\n" 33 " [-N -i<ifname> -c<conf> [-C<ctrl>] " 34 "[-D<driver>] \\\n" 35 " [-p<driver_param>] [-b<br_ifname>] [-I<config file>] " 36 "...]\n" 37 "\n" 38 "drivers:\n", 39 wpa_supplicant_version, wpa_supplicant_license); 40 41 for (i = 0; wpa_drivers[i]; i++) { 42 printf(" %s = %s\n", 43 wpa_drivers[i]->name, 44 wpa_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 " -I = additional configuration file\n" 55 " -d = increase debugging verbosity (-dd even more)\n" 56 " -D = driver name (can be multiple drivers: nl80211,wext)\n" 57 " -e = entropy file\n"); 58 #ifdef CONFIG_DEBUG_FILE 59 printf(" -f = log output to debug file instead of stdout\n"); 60 #endif /* CONFIG_DEBUG_FILE */ 61 printf(" -g = global ctrl_interface\n" 62 " -K = include keys (passwords, etc.) in debug output\n"); 63 #ifdef CONFIG_DEBUG_SYSLOG 64 printf(" -s = log output to syslog instead of stdout\n"); 65 #endif /* CONFIG_DEBUG_SYSLOG */ 66 #ifdef CONFIG_DEBUG_LINUX_TRACING 67 printf(" -T = record to Linux tracing in addition to logging\n"); 68 printf(" (records all messages regardless of debug verbosity)\n"); 69 #endif /* CONFIG_DEBUG_LINUX_TRACING */ 70 printf(" -t = include timestamp in debug messages\n" 71 " -h = show this help text\n" 72 " -L = show license (BSD)\n" 73 " -o = override driver parameter for new interfaces\n" 74 " -O = override ctrl_interface parameter for new interfaces\n" 75 " -p = driver parameters\n" 76 " -P = PID file\n" 77 " -q = decrease debugging verbosity (-qq even less)\n"); 78 #ifdef CONFIG_DBUS 79 printf(" -u = enable DBus control interface\n"); 80 #endif /* CONFIG_DBUS */ 81 printf(" -v = show version\n" 82 " -W = wait for a control interface monitor before starting\n" 83 " -N = start describing new interface\n"); 84 85 printf("example:\n" 86 " wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n", 87 wpa_drivers[i] ? wpa_drivers[i]->name : "wext"); 88 #endif /* CONFIG_NO_STDOUT_DEBUG */ 89 } 90 91 92 static void license(void) 93 { 94 #ifndef CONFIG_NO_STDOUT_DEBUG 95 printf("%s\n\n%s%s%s%s%s\n", 96 wpa_supplicant_version, 97 wpa_supplicant_full_license1, 98 wpa_supplicant_full_license2, 99 wpa_supplicant_full_license3, 100 wpa_supplicant_full_license4, 101 wpa_supplicant_full_license5); 102 #endif /* CONFIG_NO_STDOUT_DEBUG */ 103 } 104 105 106 static void wpa_supplicant_fd_workaround(int start) 107 { 108 #ifdef __linux__ 109 static int fd[3] = { -1, -1, -1 }; 110 int i; 111 /* When started from pcmcia-cs scripts, wpa_supplicant might start with 112 * fd 0, 1, and 2 closed. This will cause some issues because many 113 * places in wpa_supplicant are still printing out to stdout. As a 114 * workaround, make sure that fd's 0, 1, and 2 are not used for other 115 * sockets. */ 116 if (start) { 117 for (i = 0; i < 3; i++) { 118 fd[i] = open("/dev/null", O_RDWR); 119 if (fd[i] > 2) { 120 close(fd[i]); 121 fd[i] = -1; 122 break; 123 } 124 } 125 } else { 126 for (i = 0; i < 3; i++) { 127 if (fd[i] >= 0) { 128 close(fd[i]); 129 fd[i] = -1; 130 } 131 } 132 } 133 #endif /* __linux__ */ 134 } 135 136 137 int main(int argc, char *argv[]) 138 { 139 int c, i; 140 struct wpa_interface *ifaces, *iface; 141 int iface_count, exitcode = -1; 142 struct wpa_params params; 143 struct wpa_global *global; 144 145 if (os_program_init()) 146 return -1; 147 148 os_memset(¶ms, 0, sizeof(params)); 149 params.wpa_debug_level = MSG_INFO; 150 151 iface = ifaces = os_zalloc(sizeof(struct wpa_interface)); 152 if (ifaces == NULL) 153 return -1; 154 iface_count = 1; 155 156 wpa_supplicant_fd_workaround(1); 157 158 for (;;) { 159 c = getopt(argc, argv, 160 "b:Bc:C:D:de:f:g:hi:I:KLNo:O:p:P:qsTtuvW"); 161 if (c < 0) 162 break; 163 switch (c) { 164 case 'b': 165 iface->bridge_ifname = optarg; 166 break; 167 case 'B': 168 params.daemonize++; 169 break; 170 case 'c': 171 iface->confname = optarg; 172 break; 173 case 'C': 174 iface->ctrl_interface = optarg; 175 break; 176 case 'D': 177 iface->driver = optarg; 178 break; 179 case 'd': 180 #ifdef CONFIG_NO_STDOUT_DEBUG 181 printf("Debugging disabled with " 182 "CONFIG_NO_STDOUT_DEBUG=y build time " 183 "option.\n"); 184 goto out; 185 #else /* CONFIG_NO_STDOUT_DEBUG */ 186 params.wpa_debug_level--; 187 break; 188 #endif /* CONFIG_NO_STDOUT_DEBUG */ 189 case 'e': 190 params.entropy_file = optarg; 191 break; 192 #ifdef CONFIG_DEBUG_FILE 193 case 'f': 194 params.wpa_debug_file_path = optarg; 195 break; 196 #endif /* CONFIG_DEBUG_FILE */ 197 case 'g': 198 params.ctrl_interface = optarg; 199 break; 200 case 'h': 201 usage(); 202 exitcode = 0; 203 goto out; 204 case 'i': 205 iface->ifname = optarg; 206 break; 207 case 'I': 208 iface->confanother = optarg; 209 break; 210 case 'K': 211 params.wpa_debug_show_keys++; 212 break; 213 case 'L': 214 license(); 215 exitcode = 0; 216 goto out; 217 case 'o': 218 params.override_driver = optarg; 219 break; 220 case 'O': 221 params.override_ctrl_interface = optarg; 222 break; 223 case 'p': 224 iface->driver_param = optarg; 225 break; 226 case 'P': 227 os_free(params.pid_file); 228 params.pid_file = os_rel2abs_path(optarg); 229 break; 230 case 'q': 231 params.wpa_debug_level++; 232 break; 233 #ifdef CONFIG_DEBUG_SYSLOG 234 case 's': 235 params.wpa_debug_syslog++; 236 break; 237 #endif /* CONFIG_DEBUG_SYSLOG */ 238 #ifdef CONFIG_DEBUG_LINUX_TRACING 239 case 'T': 240 params.wpa_debug_tracing++; 241 break; 242 #endif /* CONFIG_DEBUG_LINUX_TRACING */ 243 case 't': 244 params.wpa_debug_timestamp++; 245 break; 246 #ifdef CONFIG_DBUS 247 case 'u': 248 params.dbus_ctrl_interface = 1; 249 break; 250 #endif /* CONFIG_DBUS */ 251 case 'v': 252 printf("%s\n", wpa_supplicant_version); 253 exitcode = 0; 254 goto out; 255 case 'W': 256 params.wait_for_monitor++; 257 break; 258 case 'N': 259 iface_count++; 260 iface = os_realloc_array(ifaces, iface_count, 261 sizeof(struct wpa_interface)); 262 if (iface == NULL) 263 goto out; 264 ifaces = iface; 265 iface = &ifaces[iface_count - 1]; 266 os_memset(iface, 0, sizeof(*iface)); 267 break; 268 default: 269 usage(); 270 exitcode = 0; 271 goto out; 272 } 273 } 274 275 exitcode = 0; 276 global = wpa_supplicant_init(¶ms); 277 if (global == NULL) { 278 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant"); 279 exitcode = -1; 280 goto out; 281 } else { 282 wpa_printf(MSG_INFO, "Successfully initialized " 283 "wpa_supplicant"); 284 } 285 286 for (i = 0; exitcode == 0 && i < iface_count; i++) { 287 if ((ifaces[i].confname == NULL && 288 ifaces[i].ctrl_interface == NULL) || 289 ifaces[i].ifname == NULL) { 290 if (iface_count == 1 && (params.ctrl_interface || 291 params.dbus_ctrl_interface)) 292 break; 293 usage(); 294 exitcode = -1; 295 break; 296 } 297 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL) 298 exitcode = -1; 299 } 300 301 if (exitcode == 0) 302 exitcode = wpa_supplicant_run(global); 303 304 wpa_supplicant_deinit(global); 305 306 out: 307 wpa_supplicant_fd_workaround(0); 308 os_free(ifaces); 309 os_free(params.pid_file); 310 311 os_program_deinit(); 312 313 return exitcode; 314 } 315
