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 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
23
24static void usage(void)
25{
26	int i;
27	printf("%s\n\n%s\n"
28	       "usage:\n"
29	       "  wpa_supplicant [-BddhKLqqtuvW] [-P<pid file>] "
30	       "[-g<global ctrl>] \\\n"
31	       "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
32	       "[-p<driver_param>] \\\n"
33	       "        [-b<br_ifname>] [-f<debug file>] \\\n"
34	       "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
35	       "[-D<driver>] \\\n"
36	       "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
37	       "\n"
38	       "drivers:\n",
39	       wpa_supplicant_version, wpa_supplicant_license);
40
41	for (i = 0; wpa_supplicant_drivers[i]; i++) {
42		printf("  %s = %s\n",
43		       wpa_supplicant_drivers[i]->name,
44		       wpa_supplicant_drivers[i]->desc);
45	}
46
47#ifndef CONFIG_NO_STDOUT_DEBUG
48	printf("options:\n"
49	       "  -b = optional bridge interface name\n"
50	       "  -B = run daemon in the background\n"
51	       "  -c = Configuration file\n"
52	       "  -C = ctrl_interface parameter (only used if -c is not)\n"
53	       "  -i = interface name\n"
54	       "  -d = increase debugging verbosity (-dd even more)\n"
55	       "  -D = driver name\n"
56#ifdef CONFIG_DEBUG_FILE
57	       "  -f = log output to debug file instead of stdout\n"
58#endif /* CONFIG_DEBUG_FILE */
59	       "  -g = global ctrl_interface\n"
60	       "  -K = include keys (passwords, etc.) in debug output\n"
61	       "  -t = include timestamp in debug messages\n"
62	       "  -h = show this help text\n"
63	       "  -L = show license (GPL and BSD)\n");
64	printf("  -p = driver parameters\n"
65	       "  -P = PID file\n"
66	       "  -q = decrease debugging verbosity (-qq even less)\n"
67#ifdef CONFIG_CTRL_IFACE_DBUS
68	       "  -u = enable DBus control interface\n"
69#endif /* CONFIG_CTRL_IFACE_DBUS */
70	       "  -v = show version\n"
71	       "  -W = wait for a control interface monitor before starting\n"
72	       "  -N = start describing new interface\n");
73
74	printf("example:\n"
75	       "  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
76#endif /* CONFIG_NO_STDOUT_DEBUG */
77}
78
79
80static void license(void)
81{
82#ifndef CONFIG_NO_STDOUT_DEBUG
83	printf("%s\n\n%s%s%s%s%s\n",
84	       wpa_supplicant_version,
85	       wpa_supplicant_full_license1,
86	       wpa_supplicant_full_license2,
87	       wpa_supplicant_full_license3,
88	       wpa_supplicant_full_license4,
89	       wpa_supplicant_full_license5);
90#endif /* CONFIG_NO_STDOUT_DEBUG */
91}
92
93
94static void wpa_supplicant_fd_workaround(void)
95{
96#ifdef __linux__
97	int s, i;
98	/* When started from pcmcia-cs scripts, wpa_supplicant might start with
99	 * fd 0, 1, and 2 closed. This will cause some issues because many
100	 * places in wpa_supplicant are still printing out to stdout. As a
101	 * workaround, make sure that fd's 0, 1, and 2 are not used for other
102	 * sockets. */
103	for (i = 0; i < 3; i++) {
104		s = open("/dev/null", O_RDWR);
105		if (s > 2) {
106			close(s);
107			break;
108		}
109	}
110#endif /* __linux__ */
111}
112
113
114int main(int argc, char *argv[])
115{
116	int c, i;
117	struct wpa_interface *ifaces, *iface;
118	int iface_count, exitcode = -1;
119	struct wpa_params params;
120	struct wpa_global *global;
121
122	if (os_program_init())
123		return -1;
124
125	os_memset(&params, 0, sizeof(params));
126	params.wpa_debug_level = MSG_INFO;
127
128	iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
129	if (ifaces == NULL)
130		return -1;
131	iface_count = 1;
132
133	wpa_supplicant_fd_workaround();
134
135	for (;;) {
136		c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qtuvW");
137		if (c < 0)
138			break;
139		switch (c) {
140		case 'b':
141			iface->bridge_ifname = optarg;
142			break;
143		case 'B':
144			params.daemonize++;
145			break;
146		case 'c':
147			iface->confname = optarg;
148			break;
149		case 'C':
150			iface->ctrl_interface = optarg;
151			break;
152		case 'D':
153			iface->driver = optarg;
154			break;
155		case 'd':
156#ifdef CONFIG_NO_STDOUT_DEBUG
157			printf("Debugging disabled with "
158			       "CONFIG_NO_STDOUT_DEBUG=y build time "
159			       "option.\n");
160			goto out;
161#else /* CONFIG_NO_STDOUT_DEBUG */
162			params.wpa_debug_level--;
163			break;
164#endif /* CONFIG_NO_STDOUT_DEBUG */
165#ifdef CONFIG_DEBUG_FILE
166		case 'f':
167			params.wpa_debug_file_path = optarg;
168			break;
169#endif /* CONFIG_DEBUG_FILE */
170		case 'g':
171			params.ctrl_interface = optarg;
172			break;
173		case 'h':
174			usage();
175			exitcode = 0;
176			goto out;
177		case 'i':
178			iface->ifname = optarg;
179			break;
180		case 'K':
181			params.wpa_debug_show_keys++;
182			break;
183		case 'L':
184			license();
185			exitcode = 0;
186			goto out;
187		case 'p':
188			iface->driver_param = optarg;
189			break;
190		case 'P':
191			os_free(params.pid_file);
192			params.pid_file = os_rel2abs_path(optarg);
193			break;
194		case 'q':
195			params.wpa_debug_level++;
196			break;
197		case 't':
198			params.wpa_debug_timestamp++;
199			break;
200#ifdef CONFIG_CTRL_IFACE_DBUS
201		case 'u':
202			params.dbus_ctrl_interface = 1;
203			break;
204#endif /* CONFIG_CTRL_IFACE_DBUS */
205		case 'v':
206			printf("%s\n", wpa_supplicant_version);
207			exitcode = 0;
208			goto out;
209		case 'W':
210			params.wait_for_monitor++;
211			break;
212		case 'N':
213			iface_count++;
214			iface = os_realloc(ifaces, iface_count *
215					   sizeof(struct wpa_interface));
216			if (iface == NULL)
217				goto out;
218			ifaces = iface;
219			iface = &ifaces[iface_count - 1];
220			os_memset(iface, 0, sizeof(*iface));
221			break;
222		default:
223			usage();
224			exitcode = 0;
225			goto out;
226		}
227	}
228
229	exitcode = 0;
230	global = wpa_supplicant_init(&params);
231	if (global == NULL) {
232		wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
233		exitcode = -1;
234		goto out;
235	}
236
237	for (i = 0; exitcode == 0 && i < iface_count; i++) {
238		if ((ifaces[i].confname == NULL &&
239		     ifaces[i].ctrl_interface == NULL) ||
240		    ifaces[i].ifname == NULL) {
241			if (iface_count == 1 && (params.ctrl_interface ||
242						 params.dbus_ctrl_interface))
243				break;
244			usage();
245			exitcode = -1;
246			break;
247		}
248		if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
249			exitcode = -1;
250	}
251
252	if (exitcode == 0)
253		exitcode = wpa_supplicant_run(global);
254
255	wpa_supplicant_deinit(global);
256
257out:
258	os_free(ifaces);
259	os_free(params.pid_file);
260
261	os_program_deinit();
262
263	return exitcode;
264}
265