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 
usage(void)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_CTRL_IFACE_DBUS_NEW
32 	       "u"
33 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
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 	       "  -d = increase debugging verbosity (-dd even more)\n"
69 	       "  -D = driver name (can be multiple drivers: bsd,wired)\n"
70 	       "  -e = entropy file\n"
71 #ifdef CONFIG_DEBUG_FILE
72 	       "  -f = log output to debug file instead of stdout\n"
73 #endif /* CONFIG_DEBUG_FILE */
74 	       "  -g = global ctrl_interface\n"
75 	       "  -G = global ctrl_interface group\n"
76 	       "  -h = show this help text\n"
77 	       "  -i = interface name\n"
78 	       "  -I = additional configuration file\n"
79 	       "  -K = include keys (passwords, etc.) in debug output\n"
80 	       "  -L = show license (BSD)\n"
81 #ifdef CONFIG_P2P
82 	       "  -m = Configuration file for the P2P Device interface\n"
83 #endif /* CONFIG_P2P */
84 #ifdef CONFIG_MATCH_IFACE
85 	       "  -M = start describing new matching interface\n"
86 #endif /* CONFIG_MATCH_IFACE */
87 	       "  -N = start describing new interface\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_DEBUG_SYSLOG
94 	       "  -s = log output to syslog instead of stdout\n"
95 #endif /* CONFIG_DEBUG_SYSLOG */
96 	       "  -t = include timestamp in debug messages\n"
97 #ifdef CONFIG_DEBUG_LINUX_TRACING
98 	       "  -T = record to Linux tracing in addition to logging\n"
99 	       "       (records all messages regardless of debug verbosity)\n"
100 #endif /* CONFIG_DEBUG_LINUX_TRACING */
101 #ifdef CONFIG_CTRL_IFACE_DBUS_NEW
102 	       "  -u = enable DBus control interface\n"
103 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
104 	       "  -v = show version\n"
105 	       "  -W = wait for a control interface monitor before starting\n");
106 
107 	printf("example:\n"
108                 "  wpa_supplicant -Dbsd -iwlan0 -c/etc/wpa_supplicant.conf\n");
109 #endif /* CONFIG_NO_STDOUT_DEBUG */
110 }
111 
112 
license(void)113 static void license(void)
114 {
115 #ifndef CONFIG_NO_STDOUT_DEBUG
116 	printf("%s\n\n%s%s%s%s%s\n",
117 	       wpa_supplicant_version,
118 	       wpa_supplicant_full_license1,
119 	       wpa_supplicant_full_license2,
120 	       wpa_supplicant_full_license3,
121 	       wpa_supplicant_full_license4,
122 	       wpa_supplicant_full_license5);
123 #endif /* CONFIG_NO_STDOUT_DEBUG */
124 }
125 
126 
wpa_supplicant_fd_workaround(int start)127 static void wpa_supplicant_fd_workaround(int start)
128 {
129 #ifdef __linux__
130 	static int fd[3] = { -1, -1, -1 };
131 	int i;
132 	/* When started from pcmcia-cs scripts, wpa_supplicant might start with
133 	 * fd 0, 1, and 2 closed. This will cause some issues because many
134 	 * places in wpa_supplicant are still printing out to stdout. As a
135 	 * workaround, make sure that fd's 0, 1, and 2 are not used for other
136 	 * sockets. */
137 	if (start) {
138 		for (i = 0; i < 3; i++) {
139 			fd[i] = open("/dev/null", O_RDWR);
140 			if (fd[i] > 2) {
141 				close(fd[i]);
142 				fd[i] = -1;
143 				break;
144 			}
145 		}
146 	} else {
147 		for (i = 0; i < 3; i++) {
148 			if (fd[i] >= 0) {
149 				close(fd[i]);
150 				fd[i] = -1;
151 			}
152 		}
153 	}
154 #endif /* __linux__ */
155 }
156 
157 
158 #ifdef CONFIG_MATCH_IFACE
wpa_supplicant_init_match(struct wpa_global * global)159 static int wpa_supplicant_init_match(struct wpa_global *global)
160 {
161 	/*
162 	 * The assumption is that the first driver is the primary driver and
163 	 * will handle the arrival / departure of interfaces.
164 	 */
165 	if (wpa_drivers[0]->global_init && !global->drv_priv[0]) {
166 		global->drv_priv[0] = wpa_drivers[0]->global_init(global);
167 		if (!global->drv_priv[0]) {
168 			wpa_printf(MSG_ERROR,
169 				   "Failed to initialize driver '%s'",
170 				   wpa_drivers[0]->name);
171 			return -1;
172 		}
173 	}
174 
175 	return 0;
176 }
177 #endif /* CONFIG_MATCH_IFACE */
178 
179 
main(int argc,char * argv[])180 int main(int argc, char *argv[])
181 {
182 	int c, i;
183 	struct wpa_interface *ifaces, *iface;
184 	int iface_count, exitcode = -1;
185 	struct wpa_params params;
186 	struct wpa_global *global;
187 
188 	if (os_program_init())
189 		return -1;
190 
191 	os_memset(&params, 0, sizeof(params));
192 	params.wpa_debug_level = MSG_INFO;
193 
194 	iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
195 	if (ifaces == NULL)
196 		return -1;
197 	iface_count = 1;
198 
199 	wpa_supplicant_fd_workaround(1);
200 
201 #ifdef CONFIG_DRIVER_NDIS
202 	void driver_ndis_init_ops(void);
203 	driver_ndis_init_ops();
204 #endif /* CONFIG_DRIVER_NDIS */
205 
206 	for (;;) {
207 		c = getopt(argc, argv,
208 			   "b:Bc:C:D:de:f:g:G:hi:I:KLMm:No:O:p:P:qsTtuvW");
209 		if (c < 0)
210 			break;
211 		switch (c) {
212 		case 'b':
213 			iface->bridge_ifname = optarg;
214 			break;
215 		case 'B':
216 			params.daemonize++;
217 			break;
218 		case 'c':
219 			iface->confname = optarg;
220 			break;
221 		case 'C':
222 			iface->ctrl_interface = optarg;
223 			break;
224 		case 'D':
225 			iface->driver = optarg;
226 			break;
227 		case 'd':
228 #ifdef CONFIG_NO_STDOUT_DEBUG
229 			printf("Debugging disabled with "
230 			       "CONFIG_NO_STDOUT_DEBUG=y build time "
231 			       "option.\n");
232 			goto out;
233 #else /* CONFIG_NO_STDOUT_DEBUG */
234 			params.wpa_debug_level--;
235 			break;
236 #endif /* CONFIG_NO_STDOUT_DEBUG */
237 		case 'e':
238 			params.entropy_file = optarg;
239 			break;
240 #ifdef CONFIG_DEBUG_FILE
241 		case 'f':
242 			params.wpa_debug_file_path = optarg;
243 			break;
244 #endif /* CONFIG_DEBUG_FILE */
245 		case 'g':
246 			params.ctrl_interface = optarg;
247 			break;
248 		case 'G':
249 			params.ctrl_interface_group = optarg;
250 			break;
251 		case 'h':
252 			usage();
253 			exitcode = 0;
254 			goto out;
255 		case 'i':
256 			iface->ifname = optarg;
257 			break;
258 		case 'I':
259 			iface->confanother = optarg;
260 			break;
261 		case 'K':
262 			params.wpa_debug_show_keys++;
263 			break;
264 		case 'L':
265 			license();
266 			exitcode = 0;
267 			goto out;
268 #ifdef CONFIG_P2P
269 		case 'm':
270 			params.conf_p2p_dev = optarg;
271 			break;
272 #endif /* CONFIG_P2P */
273 		case 'o':
274 			params.override_driver = optarg;
275 			break;
276 		case 'O':
277 			params.override_ctrl_interface = optarg;
278 			break;
279 		case 'p':
280 			iface->driver_param = optarg;
281 			break;
282 		case 'P':
283 			os_free(params.pid_file);
284 			params.pid_file = os_rel2abs_path(optarg);
285 			break;
286 		case 'q':
287 			params.wpa_debug_level++;
288 			break;
289 #ifdef CONFIG_DEBUG_SYSLOG
290 		case 's':
291 			params.wpa_debug_syslog++;
292 			break;
293 #endif /* CONFIG_DEBUG_SYSLOG */
294 #ifdef CONFIG_DEBUG_LINUX_TRACING
295 		case 'T':
296 			params.wpa_debug_tracing++;
297 			break;
298 #endif /* CONFIG_DEBUG_LINUX_TRACING */
299 		case 't':
300 			params.wpa_debug_timestamp++;
301 			break;
302 #ifdef CONFIG_CTRL_IFACE_DBUS_NEW
303 		case 'u':
304 			params.dbus_ctrl_interface = 1;
305 			break;
306 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
307 		case 'v':
308 			printf("%s\n", wpa_supplicant_version);
309 			exitcode = 0;
310 			goto out;
311 		case 'W':
312 			params.wait_for_monitor++;
313 			break;
314 #ifdef CONFIG_MATCH_IFACE
315 		case 'M':
316 			params.match_iface_count++;
317 			iface = os_realloc_array(params.match_ifaces,
318 						 params.match_iface_count,
319 						 sizeof(struct wpa_interface));
320 			if (!iface)
321 				goto out;
322 			params.match_ifaces = iface;
323 			iface = &params.match_ifaces[params.match_iface_count -
324 						     1];
325 			os_memset(iface, 0, sizeof(*iface));
326 			break;
327 #endif /* CONFIG_MATCH_IFACE */
328 		case 'N':
329 			iface_count++;
330 			iface = os_realloc_array(ifaces, iface_count,
331 						 sizeof(struct wpa_interface));
332 			if (iface == NULL)
333 				goto out;
334 			ifaces = iface;
335 			iface = &ifaces[iface_count - 1];
336 			os_memset(iface, 0, sizeof(*iface));
337 			break;
338 		default:
339 			usage();
340 			exitcode = 0;
341 			goto out;
342 		}
343 	}
344 
345 	exitcode = 0;
346 	global = wpa_supplicant_init(&params);
347 	if (global == NULL) {
348 		wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
349 		exitcode = -1;
350 		goto out;
351 	} else {
352 		wpa_printf(MSG_INFO, "Successfully initialized "
353 			   "wpa_supplicant");
354 	}
355 
356 	if (fst_global_init()) {
357 		wpa_printf(MSG_ERROR, "Failed to initialize FST");
358 		exitcode = -1;
359 		goto out;
360 	}
361 
362 #if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE)
363 	if (!fst_global_add_ctrl(fst_ctrl_cli))
364 		wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl");
365 #endif
366 
367 	for (i = 0; exitcode == 0 && i < iface_count; i++) {
368 		struct wpa_supplicant *wpa_s;
369 
370 		if ((ifaces[i].confname == NULL &&
371 		     ifaces[i].ctrl_interface == NULL) ||
372 		    ifaces[i].ifname == NULL) {
373 			if (iface_count == 1 && (params.ctrl_interface ||
374 #ifdef CONFIG_MATCH_IFACE
375 						 params.match_iface_count ||
376 #endif /* CONFIG_MATCH_IFACE */
377 						 params.dbus_ctrl_interface))
378 				break;
379 			usage();
380 			exitcode = -1;
381 			break;
382 		}
383 		wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
384 		if (wpa_s == NULL) {
385 			exitcode = -1;
386 			break;
387 		}
388 	}
389 
390 #ifdef CONFIG_MATCH_IFACE
391 	if (exitcode == 0)
392 		exitcode = wpa_supplicant_init_match(global);
393 #endif /* CONFIG_MATCH_IFACE */
394 
395 	if (exitcode == 0)
396 		exitcode = wpa_supplicant_run(global);
397 
398 	wpa_supplicant_deinit(global);
399 
400 	fst_global_deinit();
401 
402 out:
403 	wpa_supplicant_fd_workaround(0);
404 	os_free(ifaces);
405 #ifdef CONFIG_MATCH_IFACE
406 	os_free(params.match_ifaces);
407 #endif /* CONFIG_MATCH_IFACE */
408 	os_free(params.pid_file);
409 
410 	os_program_deinit();
411 
412 	return exitcode;
413 }
414