main.c revision 04949598a23f501be6eec21697465fd46a28840a 
1/*
2 * WPA Supplicant / main() function for UNIX like OSes and MinGW
3 * Copyright (c) 2003-2007, 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
18extern struct wpa_driver_ops *wpa_drivers[];
19
20
21static 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>] ...]\n"
36	       "\n"
37	       "drivers:\n",
38	       wpa_supplicant_version, wpa_supplicant_license);
39
40	for (i = 0; wpa_drivers[i]; i++) {
41		printf("  %s = %s\n",
42		       wpa_drivers[i]->name,
43		       wpa_drivers[i]->desc);
44	}
45
46#ifndef CONFIG_NO_STDOUT_DEBUG
47	printf("options:\n"
48	       "  -b = optional bridge interface name\n"
49	       "  -B = run daemon in the background\n"
50	       "  -c = Configuration file\n"
51	       "  -C = ctrl_interface parameter (only used if -c is not)\n"
52	       "  -i = interface name\n"
53	       "  -d = increase debugging verbosity (-dd even more)\n"
54	       "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
55	       "  -e = entropy file\n");
56#ifdef CONFIG_DEBUG_FILE
57	printf("  -f = log output to debug file instead of stdout\n");
58#endif /* CONFIG_DEBUG_FILE */
59	printf("  -g = global ctrl_interface\n"
60	       "  -K = include keys (passwords, etc.) in debug output\n");
61#ifdef CONFIG_DEBUG_SYSLOG
62	printf("  -s = log output to syslog instead of stdout\n");
63#endif /* CONFIG_DEBUG_SYSLOG */
64#ifdef CONFIG_DEBUG_LINUX_TRACING
65	printf("  -T = record to Linux tracing in addition to logging\n");
66	printf("       (records all messages regardless of debug verbosity)\n");
67#endif /* CONFIG_DEBUG_LINUX_TRACING */
68	printf("  -t = include timestamp in debug messages\n"
69	       "  -h = show this help text\n"
70	       "  -L = show license (BSD)\n"
71	       "  -o = override driver parameter for new interfaces\n"
72	       "  -O = override ctrl_interface parameter for new interfaces\n"
73	       "  -p = driver parameters\n"
74	       "  -P = PID file\n"
75	       "  -q = decrease debugging verbosity (-qq even less)\n");
76#ifdef CONFIG_DBUS
77	printf("  -u = enable DBus control interface\n");
78#endif /* CONFIG_DBUS */
79	printf("  -v = show version\n"
80	       "  -W = wait for a control interface monitor before starting\n"
81	       "  -N = start describing new interface\n");
82
83	printf("example:\n"
84	       "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
85	       wpa_drivers[i] ? wpa_drivers[i]->name : "wext");
86#endif /* CONFIG_NO_STDOUT_DEBUG */
87}
88
89
90static void license(void)
91{
92#ifndef CONFIG_NO_STDOUT_DEBUG
93	printf("%s\n\n%s%s%s%s%s\n",
94	       wpa_supplicant_version,
95	       wpa_supplicant_full_license1,
96	       wpa_supplicant_full_license2,
97	       wpa_supplicant_full_license3,
98	       wpa_supplicant_full_license4,
99	       wpa_supplicant_full_license5);
100#endif /* CONFIG_NO_STDOUT_DEBUG */
101}
102
103
104static void wpa_supplicant_fd_workaround(void)
105{
106#ifdef __linux__
107	int s, i;
108	/* When started from pcmcia-cs scripts, wpa_supplicant might start with
109	 * fd 0, 1, and 2 closed. This will cause some issues because many
110	 * places in wpa_supplicant are still printing out to stdout. As a
111	 * workaround, make sure that fd's 0, 1, and 2 are not used for other
112	 * sockets. */
113	for (i = 0; i < 3; i++) {
114		s = open("/dev/null", O_RDWR);
115		if (s > 2) {
116			close(s);
117			break;
118		}
119	}
120#endif /* __linux__ */
121}
122
123
124int main(int argc, char *argv[])
125{
126	int c, i;
127	struct wpa_interface *ifaces, *iface;
128	int iface_count, exitcode = -1;
129	struct wpa_params params;
130	struct wpa_global *global;
131
132	if (os_program_init())
133		return -1;
134
135	os_memset(&params, 0, sizeof(params));
136	params.wpa_debug_level = MSG_INFO;
137
138	iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
139	if (ifaces == NULL)
140		return -1;
141	iface_count = 1;
142
143	wpa_supplicant_fd_workaround();
144
145	for (;;) {
146		c = getopt(argc, argv,
147			   "b:Bc:C:D:de:f:g:hi:KLNo:O:p:P:qsTtuvW");
148		if (c < 0)
149			break;
150		switch (c) {
151		case 'b':
152			iface->bridge_ifname = optarg;
153			break;
154		case 'B':
155			params.daemonize++;
156			break;
157		case 'c':
158			iface->confname = optarg;
159			break;
160		case 'C':
161			iface->ctrl_interface = optarg;
162			break;
163		case 'D':
164			iface->driver = optarg;
165			break;
166		case 'd':
167#ifdef CONFIG_NO_STDOUT_DEBUG
168			printf("Debugging disabled with "
169			       "CONFIG_NO_STDOUT_DEBUG=y build time "
170			       "option.\n");
171			goto out;
172#else /* CONFIG_NO_STDOUT_DEBUG */
173			params.wpa_debug_level--;
174			break;
175#endif /* CONFIG_NO_STDOUT_DEBUG */
176		case 'e':
177			params.entropy_file = optarg;
178			break;
179#ifdef CONFIG_DEBUG_FILE
180		case 'f':
181			params.wpa_debug_file_path = optarg;
182			break;
183#endif /* CONFIG_DEBUG_FILE */
184		case 'g':
185			params.ctrl_interface = optarg;
186			break;
187		case 'h':
188			usage();
189			exitcode = 0;
190			goto out;
191		case 'i':
192			iface->ifname = optarg;
193			break;
194		case 'K':
195			params.wpa_debug_show_keys++;
196			break;
197		case 'L':
198			license();
199			exitcode = 0;
200			goto out;
201		case 'o':
202			params.override_driver = optarg;
203			break;
204		case 'O':
205			params.override_ctrl_interface = optarg;
206			break;
207		case 'p':
208			iface->driver_param = optarg;
209			break;
210		case 'P':
211			os_free(params.pid_file);
212			params.pid_file = os_rel2abs_path(optarg);
213			break;
214		case 'q':
215			params.wpa_debug_level++;
216			break;
217#ifdef CONFIG_DEBUG_SYSLOG
218		case 's':
219			params.wpa_debug_syslog++;
220			break;
221#endif /* CONFIG_DEBUG_SYSLOG */
222#ifdef CONFIG_DEBUG_LINUX_TRACING
223		case 'T':
224			params.wpa_debug_tracing++;
225			break;
226#endif /* CONFIG_DEBUG_LINUX_TRACING */
227		case 't':
228			params.wpa_debug_timestamp++;
229			break;
230#ifdef CONFIG_DBUS
231		case 'u':
232			params.dbus_ctrl_interface = 1;
233			break;
234#endif /* CONFIG_DBUS */
235		case 'v':
236			printf("%s\n", wpa_supplicant_version);
237			exitcode = 0;
238			goto out;
239		case 'W':
240			params.wait_for_monitor++;
241			break;
242		case 'N':
243			iface_count++;
244			iface = os_realloc(ifaces, iface_count *
245					   sizeof(struct wpa_interface));
246			if (iface == NULL)
247				goto out;
248			ifaces = iface;
249			iface = &ifaces[iface_count - 1];
250			os_memset(iface, 0, sizeof(*iface));
251			break;
252		default:
253			usage();
254			exitcode = 0;
255			goto out;
256		}
257	}
258
259	exitcode = 0;
260	global = wpa_supplicant_init(&params);
261	if (global == NULL) {
262		wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
263		exitcode = -1;
264		goto out;
265	} else {
266		wpa_printf(MSG_INFO, "Successfully initialized "
267			   "wpa_supplicant");
268	}
269
270	for (i = 0; exitcode == 0 && i < iface_count; i++) {
271		if ((ifaces[i].confname == NULL &&
272		     ifaces[i].ctrl_interface == NULL) ||
273		    ifaces[i].ifname == NULL) {
274			if (iface_count == 1 && (params.ctrl_interface ||
275						 params.dbus_ctrl_interface))
276				break;
277			usage();
278			exitcode = -1;
279			break;
280		}
281		if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
282			exitcode = -1;
283	}
284
285	if (exitcode == 0)
286		exitcode = wpa_supplicant_run(global);
287
288	wpa_supplicant_deinit(global);
289
290out:
291	os_free(ifaces);
292	os_free(params.pid_file);
293
294	os_program_deinit();
295
296	return exitcode;
297}
298