Select the BSD license terms as the only license alternative
[build-utilities/hostap.git] / wpa_supplicant / main.c
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  */
15 #include "includes.h"
16 #ifdef __linux__
17 #include <fcntl.h>
18 #endif /* __linux__ */
20 #include "common.h"
21 #include "wpa_supplicant_i.h"
22 #include "driver_i.h"
24 extern struct wpa_driver_ops *wpa_drivers[];
27 static void usage(void)
28 {
29         int i;
30         printf("%s\n\n%s\n"
31                "usage:\n"
32                "  wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] "
33                "[-g<global ctrl>] \\\n"
34                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
35                "[-p<driver_param>] \\\n"
36                "        [-b<br_ifname>] [-f<debug file>] [-e<entropy file>] "
37                "\\\n"
38                "        [-o<override driver>] [-O<override ctrl>] \\\n"
39                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
40                "[-D<driver>] \\\n"
41                "        [-p<driver_param>] [-b<br_ifname>] ...]\n"
42                "\n"
43                "drivers:\n",
44                wpa_supplicant_version, wpa_supplicant_license);
46         for (i = 0; wpa_drivers[i]; i++) {
47                 printf("  %s = %s\n",
48                        wpa_drivers[i]->name,
49                        wpa_drivers[i]->desc);
50         }
52 #ifndef CONFIG_NO_STDOUT_DEBUG
53         printf("options:\n"
54                "  -b = optional bridge interface name\n"
55                "  -B = run daemon in the background\n"
56                "  -c = Configuration file\n"
57                "  -C = ctrl_interface parameter (only used if -c is not)\n"
58                "  -i = interface name\n"
59                "  -d = increase debugging verbosity (-dd even more)\n"
60                "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
61                "  -e = entropy file\n");
62 #ifdef CONFIG_DEBUG_FILE
63         printf("  -f = log output to debug file instead of stdout\n");
64 #endif /* CONFIG_DEBUG_FILE */
65         printf("  -g = global ctrl_interface\n"
66                "  -K = include keys (passwords, etc.) in debug output\n");
67 #ifdef CONFIG_DEBUG_SYSLOG
68         printf("  -s = log output to syslog instead of stdout\n");
69 #endif /* CONFIG_DEBUG_SYSLOG */
70         printf("  -t = include timestamp in debug messages\n"
71                "  -h = show this help text\n"
72                "  -L = show license (BSD)\n"
73                "  -o = override driver parameter for new interfaces\n"
74                "  -O = override ctrl_interface parameter for new interfaces\n"
75                "  -p = driver parameters\n"
76                "  -P = PID file\n"
77                "  -q = decrease debugging verbosity (-qq even less)\n");
78 #ifdef CONFIG_DBUS
79         printf("  -u = enable DBus control interface\n");
80 #endif /* CONFIG_DBUS */
81         printf("  -v = show version\n"
82                "  -W = wait for a control interface monitor before starting\n"
83                "  -N = start describing new interface\n");
85         printf("example:\n"
86                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
87                wpa_drivers[i] ? wpa_drivers[i]->name : "wext");
88 #endif /* CONFIG_NO_STDOUT_DEBUG */
89 }
92 static void license(void)
93 {
94 #ifndef CONFIG_NO_STDOUT_DEBUG
95         printf("%s\n\n%s%s%s%s%s\n",
96                wpa_supplicant_version,
97                wpa_supplicant_full_license1,
98                wpa_supplicant_full_license2,
99                wpa_supplicant_full_license3,
100                wpa_supplicant_full_license4,
101                wpa_supplicant_full_license5);
102 #endif /* CONFIG_NO_STDOUT_DEBUG */
106 static void wpa_supplicant_fd_workaround(void)
108 #ifdef __linux__
109         int s, i;
110         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
111          * fd 0, 1, and 2 closed. This will cause some issues because many
112          * places in wpa_supplicant are still printing out to stdout. As a
113          * workaround, make sure that fd's 0, 1, and 2 are not used for other
114          * sockets. */
115         for (i = 0; i < 3; i++) {
116                 s = open("/dev/null", O_RDWR);
117                 if (s > 2) {
118                         close(s);
119                         break;
120                 }
121         }
122 #endif /* __linux__ */
126 int main(int argc, char *argv[])
128         int c, i;
129         struct wpa_interface *ifaces, *iface;
130         int iface_count, exitcode = -1;
131         struct wpa_params params;
132         struct wpa_global *global;
134         if (os_program_init())
135                 return -1;
137         os_memset(&params, 0, sizeof(params));
138         params.wpa_debug_level = MSG_INFO;
140         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
141         if (ifaces == NULL)
142                 return -1;
143         iface_count = 1;
145         wpa_supplicant_fd_workaround();
147         for (;;) {
148                 c = getopt(argc, argv, "b:Bc:C:D:de:f:g:hi:KLNo:O:p:P:qstuvW");
149                 if (c < 0)
150                         break;
151                 switch (c) {
152                 case 'b':
153                         iface->bridge_ifname = optarg;
154                         break;
155                 case 'B':
156                         params.daemonize++;
157                         break;
158                 case 'c':
159                         iface->confname = optarg;
160                         break;
161                 case 'C':
162                         iface->ctrl_interface = optarg;
163                         break;
164                 case 'D':
165                         iface->driver = optarg;
166                         break;
167                 case 'd':
168 #ifdef CONFIG_NO_STDOUT_DEBUG
169                         printf("Debugging disabled with "
170                                "CONFIG_NO_STDOUT_DEBUG=y build time "
171                                "option.\n");
172                         goto out;
173 #else /* CONFIG_NO_STDOUT_DEBUG */
174                         params.wpa_debug_level--;
175                         break;
176 #endif /* CONFIG_NO_STDOUT_DEBUG */
177                 case 'e':
178                         params.entropy_file = optarg;
179                         break;
180 #ifdef CONFIG_DEBUG_FILE
181                 case 'f':
182                         params.wpa_debug_file_path = optarg;
183                         break;
184 #endif /* CONFIG_DEBUG_FILE */
185                 case 'g':
186                         params.ctrl_interface = optarg;
187                         break;
188                 case 'h':
189                         usage();
190                         exitcode = 0;
191                         goto out;
192                 case 'i':
193                         iface->ifname = optarg;
194                         break;
195                 case 'K':
196                         params.wpa_debug_show_keys++;
197                         break;
198                 case 'L':
199                         license();
200                         exitcode = 0;
201                         goto out;
202                 case 'o':
203                         params.override_driver = optarg;
204                         break;
205                 case 'O':
206                         params.override_ctrl_interface = optarg;
207                         break;
208                 case 'p':
209                         iface->driver_param = optarg;
210                         break;
211                 case 'P':
212                         os_free(params.pid_file);
213                         params.pid_file = os_rel2abs_path(optarg);
214                         break;
215                 case 'q':
216                         params.wpa_debug_level++;
217                         break;
218 #ifdef CONFIG_DEBUG_SYSLOG
219                 case 's':
220                         params.wpa_debug_syslog++;
221                         break;
222 #endif /* CONFIG_DEBUG_SYSLOG */
223                 case 't':
224                         params.wpa_debug_timestamp++;
225                         break;
226 #ifdef CONFIG_DBUS
227                 case 'u':
228                         params.dbus_ctrl_interface = 1;
229                         break;
230 #endif /* CONFIG_DBUS */
231                 case 'v':
232                         printf("%s\n", wpa_supplicant_version);
233                         exitcode = 0;
234                         goto out;
235                 case 'W':
236                         params.wait_for_monitor++;
237                         break;
238                 case 'N':
239                         iface_count++;
240                         iface = os_realloc(ifaces, iface_count *
241                                            sizeof(struct wpa_interface));
242                         if (iface == NULL)
243                                 goto out;
244                         ifaces = iface;
245                         iface = &ifaces[iface_count - 1]; 
246                         os_memset(iface, 0, sizeof(*iface));
247                         break;
248                 default:
249                         usage();
250                         exitcode = 0;
251                         goto out;
252                 }
253         }
255         exitcode = 0;
256         global = wpa_supplicant_init(&params);
257         if (global == NULL) {
258                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
259                 exitcode = -1;
260                 goto out;
261         }
263         for (i = 0; exitcode == 0 && i < iface_count; i++) {
264                 if ((ifaces[i].confname == NULL &&
265                      ifaces[i].ctrl_interface == NULL) ||
266                     ifaces[i].ifname == NULL) {
267                         if (iface_count == 1 && (params.ctrl_interface ||
268                                                  params.dbus_ctrl_interface))
269                                 break;
270                         usage();
271                         exitcode = -1;
272                         break;
273                 }
274                 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
275                         exitcode = -1;
276         }
278         if (exitcode == 0)
279                 exitcode = wpa_supplicant_run(global);
281         wpa_supplicant_deinit(global);
283 out:
284         os_free(ifaces);
285         os_free(params.pid_file);
287         os_program_deinit();
289         return exitcode;