main.c revision 2ac5f6049e74103a8fe8e9c78b330020081d7df4 
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
20static 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
110static 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
124static 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
155int 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(&params, 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(&params);
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]);
326		if (wpa_s == NULL) {
327			exitcode = -1;
328			break;
329		}
330#ifdef CONFIG_P2P
331		if (wpa_s->global->p2p == NULL &&
332		    (wpa_s->drv_flags &
333		     WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE) &&
334		    wpas_p2p_add_p2pdev_interface(wpa_s) < 0)
335			exitcode = -1;
336#endif /* CONFIG_P2P */
337	}
338
339	if (exitcode == 0)
340		exitcode = wpa_supplicant_run(global);
341
342	wpa_supplicant_deinit(global);
343
344out:
345	wpa_supplicant_fd_workaround(0);
346	os_free(ifaces);
347	os_free(params.pid_file);
348
349	os_program_deinit();
350
351	return exitcode;
352}
353