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 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>] [-e<entropy file>] " 37 "\\\n" 38 " [-o<override driver>] [-O<override ctrl>] \\\n" 39 " [-N -i<ifname> -c<conf> [-C<ctrl>] " 40 "[-D<driver>] \\\n" 41 " [-p<driver_param>] [-b<br_ifname>] ...]\n" 42 "\n" 43 "drivers:\n", 44 wpa_supplicant_version, wpa_supplicant_license); 45 46 for (i = 0; wpa_drivers[i]; i++) { 47 printf(" %s = %s\n", 48 wpa_drivers[i]->name, 49 wpa_drivers[i]->desc); 50 } 51 52 #ifndef CONFIG_NO_STDOUT_DEBUG 53 printf("options:\n" 54 " -b = optional bridge interface name\n" 55 " -B = run daemon in the background\n" 56 " -c = Configuration file\n" 57 " -C = ctrl_interface parameter (only used if -c is not)\n" 58 " -i = interface name\n" 59 " -d = increase debugging verbosity (-dd even more)\n" 60 " -D = driver name (can be multiple drivers: nl80211,wext)\n" 61 " -e = entropy file\n"); 62 #ifdef CONFIG_DEBUG_FILE 63 printf(" -f = log output to debug file instead of stdout\n"); 64 #endif /* CONFIG_DEBUG_FILE */ 65 printf(" -g = global ctrl_interface\n" 66 " -K = include keys (passwords, etc.) in debug output\n"); 67 #ifdef CONFIG_DEBUG_SYSLOG 68 printf(" -s = log output to syslog instead of stdout\n"); 69 #endif /* CONFIG_DEBUG_SYSLOG */ 70 printf(" -t = include timestamp in debug messages\n" 71 " -h = show this help text\n" 72 " -L = show license (GPL and 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(void) 107 { 108 #ifdef __linux__ 109 int s, i; 110 /* When started from pcmcia-cs scripts, wpa_supplicant might start with 111 * fd 0, 1, and 2 closed. This will cause some issues because many 112 * places in wpa_supplicant are still printing out to stdout. As a 113 * workaround, make sure that fd's 0, 1, and 2 are not used for other 114 * sockets. */ 115 for (i = 0; i < 3; i++) { 116 s = open("/dev/null", O_RDWR); 117 if (s > 2) { 118 close(s); 119 break; 120 } 121 } 122 #endif /* __linux__ */ 123 } 124 125 126 int main(int argc, char *argv[]) 127 { 128 int c, i; 129 struct wpa_interface *ifaces, *iface; 130 int iface_count, exitcode = -1; 131 struct wpa_params params; 132 struct wpa_global *global; 133 134 if (os_program_init()) 135 return -1; 136 137 os_memset(¶ms, 0, sizeof(params)); 138 params.wpa_debug_level = MSG_INFO; 139 140 iface = ifaces = os_zalloc(sizeof(struct wpa_interface)); 141 if (ifaces == NULL) 142 return -1; 143 iface_count = 1; 144 145 wpa_supplicant_fd_workaround(); 146 147 for (;;) { 148 c = getopt(argc, argv, "b:Bc:C:D:de:f:g:hi:KLNo:O:p:P:qstuvW"); 149 if (c < 0) 150 break; 151 switch (c) { 152 case 'b': 153 iface->bridge_ifname = optarg; 154 break; 155 case 'B': 156 params.daemonize++; 157 break; 158 case 'c': 159 iface->confname = optarg; 160 break; 161 case 'C': 162 iface->ctrl_interface = optarg; 163 break; 164 case 'D': 165 iface->driver = optarg; 166 break; 167 case 'd': 168 #ifdef CONFIG_NO_STDOUT_DEBUG 169 printf("Debugging disabled with " 170 "CONFIG_NO_STDOUT_DEBUG=y build time " 171 "option.\n"); 172 goto out; 173 #else /* CONFIG_NO_STDOUT_DEBUG */ 174 params.wpa_debug_level--; 175 break; 176 #endif /* CONFIG_NO_STDOUT_DEBUG */ 177 case 'e': 178 params.entropy_file = optarg; 179 break; 180 #ifdef CONFIG_DEBUG_FILE 181 case 'f': 182 params.wpa_debug_file_path = optarg; 183 break; 184 #endif /* CONFIG_DEBUG_FILE */ 185 case 'g': 186 params.ctrl_interface = optarg; 187 break; 188 case 'h': 189 usage(); 190 exitcode = 0; 191 goto out; 192 case 'i': 193 iface->ifname = optarg; 194 break; 195 case 'K': 196 params.wpa_debug_show_keys++; 197 break; 198 case 'L': 199 license(); 200 exitcode = 0; 201 goto out; 202 case 'o': 203 params.override_driver = optarg; 204 break; 205 case 'O': 206 params.override_ctrl_interface = optarg; 207 break; 208 case 'p': 209 iface->driver_param = optarg; 210 break; 211 case 'P': 212 os_free(params.pid_file); 213 params.pid_file = os_rel2abs_path(optarg); 214 break; 215 case 'q': 216 params.wpa_debug_level++; 217 break; 218 #ifdef CONFIG_DEBUG_SYSLOG 219 case 's': 220 params.wpa_debug_syslog++; 221 break; 222 #endif /* CONFIG_DEBUG_SYSLOG */ 223 case 't': 224 params.wpa_debug_timestamp++; 225 break; 226 #ifdef CONFIG_DBUS 227 case 'u': 228 params.dbus_ctrl_interface = 1; 229 break; 230 #endif /* CONFIG_DBUS */ 231 case 'v': 232 printf("%s\n", wpa_supplicant_version); 233 exitcode = 0; 234 goto out; 235 case 'W': 236 params.wait_for_monitor++; 237 break; 238 case 'N': 239 iface_count++; 240 iface = os_realloc(ifaces, iface_count * 241 sizeof(struct wpa_interface)); 242 if (iface == NULL) 243 goto out; 244 ifaces = iface; 245 iface = &ifaces[iface_count - 1]; 246 os_memset(iface, 0, sizeof(*iface)); 247 break; 248 default: 249 usage(); 250 exitcode = 0; 251 goto out; 252 } 253 } 254 255 exitcode = 0; 256 global = wpa_supplicant_init(¶ms); 257 if (global == NULL) { 258 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant"); 259 exitcode = -1; 260 goto out; 261 } 262 263 for (i = 0; exitcode == 0 && i < iface_count; i++) { 264 if ((ifaces[i].confname == NULL && 265 ifaces[i].ctrl_interface == NULL) || 266 ifaces[i].ifname == NULL) { 267 if (iface_count == 1 && (params.ctrl_interface || 268 params.dbus_ctrl_interface)) 269 break; 270 usage(); 271 exitcode = -1; 272 break; 273 } 274 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL) 275 exitcode = -1; 276 } 277 278 if (exitcode == 0) 279 exitcode = wpa_supplicant_run(global); 280 281 wpa_supplicant_deinit(global); 282 283 out: 284 os_free(ifaces); 285 os_free(params.pid_file); 286 287 os_program_deinit(); 288 289 return exitcode; 290 } 291
