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
21static 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	       "  -d = increase debugging verbosity (-dd even more)\n"
69	       "  -D = driver name (can be multiple drivers: nl80211,wext)\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_DBUS
102	       "  -u = enable DBus control interface\n"
103#endif /* CONFIG_DBUS */
104	       "  -v = show version\n"
105	       "  -W = wait for a control interface monitor before starting\n");
106
107	printf("example:\n"
108	       "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
109	       wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
110#endif /* CONFIG_NO_STDOUT_DEBUG */
111}
112
113
114static void license(void)
115{
116#ifndef CONFIG_NO_STDOUT_DEBUG
117	printf("%s\n\n%s%s%s%s%s\n",
118	       wpa_supplicant_version,
119	       wpa_supplicant_full_license1,
120	       wpa_supplicant_full_license2,
121	       wpa_supplicant_full_license3,
122	       wpa_supplicant_full_license4,
123	       wpa_supplicant_full_license5);
124#endif /* CONFIG_NO_STDOUT_DEBUG */
125}
126
127
128static void wpa_supplicant_fd_workaround(int start)
129{
130#ifdef __linux__
131	static int fd[3] = { -1, -1, -1 };
132	int i;
133	/* When started from pcmcia-cs scripts, wpa_supplicant might start with
134	 * fd 0, 1, and 2 closed. This will cause some issues because many
135	 * places in wpa_supplicant are still printing out to stdout. As a
136	 * workaround, make sure that fd's 0, 1, and 2 are not used for other
137	 * sockets. */
138	if (start) {
139		for (i = 0; i < 3; i++) {
140			fd[i] = open("/dev/null", O_RDWR);
141			if (fd[i] > 2) {
142				close(fd[i]);
143				fd[i] = -1;
144				break;
145			}
146		}
147	} else {
148		for (i = 0; i < 3; i++) {
149			if (fd[i] >= 0) {
150				close(fd[i]);
151				fd[i] = -1;
152			}
153		}
154	}
155#endif /* __linux__ */
156}
157
158
159#ifdef CONFIG_MATCH_IFACE
160static int wpa_supplicant_init_match(struct wpa_global *global)
161{
162	/*
163	 * The assumption is that the first driver is the primary driver and
164	 * will handle the arrival / departure of interfaces.
165	 */
166	if (wpa_drivers[0]->global_init && !global->drv_priv[0]) {
167		global->drv_priv[0] = wpa_drivers[0]->global_init(global);
168		if (!global->drv_priv[0]) {
169			wpa_printf(MSG_ERROR,
170				   "Failed to initialize driver '%s'",
171				   wpa_drivers[0]->name);
172			return -1;
173		}
174	}
175
176	return 0;
177}
178#endif /* CONFIG_MATCH_IFACE */
179
180
181int main(int argc, char *argv[])
182{
183	int c, i;
184	struct wpa_interface *ifaces, *iface;
185	int iface_count, exitcode = -1;
186	struct wpa_params params;
187	struct wpa_global *global;
188
189	if (os_program_init())
190		return -1;
191
192	os_memset(&params, 0, sizeof(params));
193	params.wpa_debug_level = MSG_INFO;
194
195	iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
196	if (ifaces == NULL)
197		return -1;
198	iface_count = 1;
199
200	wpa_supplicant_fd_workaround(1);
201
202	for (;;) {
203		c = getopt(argc, argv,
204			   "b:Bc:C:D:de:f:g:G:hi:I:KLMm:No:O:p:P:qsTtuvW");
205		if (c < 0)
206			break;
207		switch (c) {
208		case 'b':
209			iface->bridge_ifname = optarg;
210			break;
211		case 'B':
212			params.daemonize++;
213			break;
214		case 'c':
215			iface->confname = optarg;
216			break;
217		case 'C':
218			iface->ctrl_interface = optarg;
219			break;
220		case 'D':
221			iface->driver = optarg;
222			break;
223		case 'd':
224#ifdef CONFIG_NO_STDOUT_DEBUG
225			printf("Debugging disabled with "
226			       "CONFIG_NO_STDOUT_DEBUG=y build time "
227			       "option.\n");
228			goto out;
229#else /* CONFIG_NO_STDOUT_DEBUG */
230			params.wpa_debug_level--;
231			break;
232#endif /* CONFIG_NO_STDOUT_DEBUG */
233		case 'e':
234			params.entropy_file = optarg;
235			break;
236#ifdef CONFIG_DEBUG_FILE
237		case 'f':
238			params.wpa_debug_file_path = optarg;
239			break;
240#endif /* CONFIG_DEBUG_FILE */
241		case 'g':
242			params.ctrl_interface = optarg;
243			break;
244		case 'G':
245			params.ctrl_interface_group = optarg;
246			break;
247		case 'h':
248			usage();
249			exitcode = 0;
250			goto out;
251		case 'i':
252			iface->ifname = optarg;
253			break;
254		case 'I':
255			iface->confanother = optarg;
256			break;
257		case 'K':
258			params.wpa_debug_show_keys++;
259			break;
260		case 'L':
261			license();
262			exitcode = 0;
263			goto out;
264#ifdef CONFIG_P2P
265		case 'm':
266			params.conf_p2p_dev = optarg;
267			break;
268#endif /* CONFIG_P2P */
269		case 'o':
270			params.override_driver = optarg;
271			break;
272		case 'O':
273			params.override_ctrl_interface = optarg;
274			break;
275		case 'p':
276			iface->driver_param = optarg;
277			break;
278		case 'P':
279			os_free(params.pid_file);
280			params.pid_file = os_rel2abs_path(optarg);
281			break;
282		case 'q':
283			params.wpa_debug_level++;
284			break;
285#ifdef CONFIG_DEBUG_SYSLOG
286		case 's':
287			params.wpa_debug_syslog++;
288			break;
289#endif /* CONFIG_DEBUG_SYSLOG */
290#ifdef CONFIG_DEBUG_LINUX_TRACING
291		case 'T':
292			params.wpa_debug_tracing++;
293			break;
294#endif /* CONFIG_DEBUG_LINUX_TRACING */
295		case 't':
296			params.wpa_debug_timestamp++;
297			break;
298#ifdef CONFIG_DBUS
299		case 'u':
300			params.dbus_ctrl_interface = 1;
301			break;
302#endif /* CONFIG_DBUS */
303		case 'v':
304			printf("%s\n", wpa_supplicant_version);
305			exitcode = 0;
306			goto out;
307		case 'W':
308			params.wait_for_monitor++;
309			break;
310#ifdef CONFIG_MATCH_IFACE
311		case 'M':
312			params.match_iface_count++;
313			iface = os_realloc_array(params.match_ifaces,
314						 params.match_iface_count,
315						 sizeof(struct wpa_interface));
316			if (!iface)
317				goto out;
318			params.match_ifaces = iface;
319			iface = &params.match_ifaces[params.match_iface_count -
320						     1];
321			os_memset(iface, 0, sizeof(*iface));
322			break;
323#endif /* CONFIG_MATCH_IFACE */
324		case 'N':
325			iface_count++;
326			iface = os_realloc_array(ifaces, iface_count,
327						 sizeof(struct wpa_interface));
328			if (iface == NULL)
329				goto out;
330			ifaces = iface;
331			iface = &ifaces[iface_count - 1];
332			os_memset(iface, 0, sizeof(*iface));
333			break;
334		default:
335			usage();
336			exitcode = 0;
337			goto out;
338		}
339	}
340
341	exitcode = 0;
342	global = wpa_supplicant_init(&params);
343	if (global == NULL) {
344		wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
345		exitcode = -1;
346		goto out;
347	} else {
348		wpa_printf(MSG_INFO, "Successfully initialized "
349			   "wpa_supplicant");
350	}
351
352	if (fst_global_init()) {
353		wpa_printf(MSG_ERROR, "Failed to initialize FST");
354		exitcode = -1;
355		goto out;
356	}
357
358#if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE)
359	if (!fst_global_add_ctrl(fst_ctrl_cli))
360		wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl");
361#endif
362
363	for (i = 0; exitcode == 0 && i < iface_count; i++) {
364		struct wpa_supplicant *wpa_s;
365
366		if ((ifaces[i].confname == NULL &&
367		     ifaces[i].ctrl_interface == NULL) ||
368		    ifaces[i].ifname == NULL) {
369			if (iface_count == 1 && (params.ctrl_interface ||
370#ifdef CONFIG_MATCH_IFACE
371						 params.match_iface_count ||
372#endif /* CONFIG_MATCH_IFACE */
373						 params.dbus_ctrl_interface))
374				break;
375			usage();
376			exitcode = -1;
377			break;
378		}
379		wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
380		if (wpa_s == NULL) {
381			exitcode = -1;
382			break;
383		}
384	}
385
386#ifdef CONFIG_MATCH_IFACE
387	if (exitcode == 0)
388		exitcode = wpa_supplicant_init_match(global);
389#endif /* CONFIG_MATCH_IFACE */
390
391	if (exitcode == 0)
392		exitcode = wpa_supplicant_run(global);
393
394	wpa_supplicant_deinit(global);
395
396	fst_global_deinit();
397
398out:
399	wpa_supplicant_fd_workaround(0);
400	os_free(ifaces);
401#ifdef CONFIG_MATCH_IFACE
402	os_free(params.match_ifaces);
403#endif /* CONFIG_MATCH_IFACE */
404	os_free(params.pid_file);
405
406	os_program_deinit();
407
408	return exitcode;
409}
410