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
24 extern const char *wpa_supplicant_version;
25 extern const char *wpa_supplicant_license;
26 #ifndef CONFIG_NO_STDOUT_DEBUG
27 extern const char *wpa_supplicant_full_license1;
28 extern const char *wpa_supplicant_full_license2;
29 extern const char *wpa_supplicant_full_license3;
30 extern const char *wpa_supplicant_full_license4;
31 extern const char *wpa_supplicant_full_license5;
32 #endif /* CONFIG_NO_STDOUT_DEBUG */
33
34 extern struct wpa_driver_ops *wpa_supplicant_drivers[];
35
36
usage(void)37 static void usage(void)
38 {
39 int i;
40 printf("%s\n\n%s\n"
41 "usage:\n"
42 " wpa_supplicant [-BddhKLqqtuvwW] [-P<pid file>] "
43 "[-g<global ctrl>] \\\n"
44 " -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
45 "[-p<driver_param>] \\\n"
46 " [-b<br_ifname>] [-f<debug file>] \\\n"
47 " [-N -i<ifname> -c<conf> [-C<ctrl>] "
48 "[-D<driver>] \\\n"
49 " [-p<driver_param>] [-b<br_ifname>] ...]\n"
50 "\n"
51 "drivers:\n",
52 wpa_supplicant_version, wpa_supplicant_license);
53
54 for (i = 0; wpa_supplicant_drivers[i]; i++) {
55 printf(" %s = %s\n",
56 wpa_supplicant_drivers[i]->name,
57 wpa_supplicant_drivers[i]->desc);
58 }
59
60 #ifndef CONFIG_NO_STDOUT_DEBUG
61 printf("options:\n"
62 " -b = optional bridge interface name\n"
63 " -B = run daemon in the background\n"
64 " -c = Configuration file\n"
65 " -C = ctrl_interface parameter (only used if -c is not)\n"
66 " -i = interface name\n"
67 " -d = increase debugging verbosity (-dd even more)\n"
68 " -D = driver name\n"
69 #ifdef CONFIG_DEBUG_FILE
70 " -f = log output to debug file instead of stdout\n"
71 #endif /* CONFIG_DEBUG_FILE */
72 " -g = global ctrl_interface\n"
73 " -K = include keys (passwords, etc.) in debug output\n"
74 " -t = include timestamp in debug messages\n"
75 " -h = show this help text\n"
76 " -L = show license (GPL and BSD)\n");
77 printf(" -p = driver parameters\n"
78 " -P = PID file\n"
79 " -q = decrease debugging verbosity (-qq even less)\n"
80 #ifdef CONFIG_CTRL_IFACE_DBUS
81 " -u = enable DBus control interface\n"
82 #endif /* CONFIG_CTRL_IFACE_DBUS */
83 " -v = show version\n"
84 " -w = wait for interface to be added, if needed\n"
85 " -W = wait for a control interface monitor before starting\n"
86 " -N = start describing new interface\n");
87
88 printf("example:\n"
89 " wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf\n");
90 #endif /* CONFIG_NO_STDOUT_DEBUG */
91 }
92
93
license(void)94 static void license(void)
95 {
96 #ifndef CONFIG_NO_STDOUT_DEBUG
97 printf("%s\n\n%s%s%s%s%s\n",
98 wpa_supplicant_version,
99 wpa_supplicant_full_license1,
100 wpa_supplicant_full_license2,
101 wpa_supplicant_full_license3,
102 wpa_supplicant_full_license4,
103 wpa_supplicant_full_license5);
104 #endif /* CONFIG_NO_STDOUT_DEBUG */
105 }
106
107
wpa_supplicant_fd_workaround(void)108 static void wpa_supplicant_fd_workaround(void)
109 {
110 #ifdef __linux__
111 int s, i;
112 /* When started from pcmcia-cs scripts, wpa_supplicant might start with
113 * fd 0, 1, and 2 closed. This will cause some issues because many
114 * places in wpa_supplicant are still printing out to stdout. As a
115 * workaround, make sure that fd's 0, 1, and 2 are not used for other
116 * sockets. */
117 for (i = 0; i < 3; i++) {
118 s = open("/dev/null", O_RDWR);
119 if (s > 2) {
120 close(s);
121 break;
122 }
123 }
124 #endif /* __linux__ */
125 }
126
127
main(int argc,char * argv[])128 int main(int argc, char *argv[])
129 {
130 int c, i;
131 struct wpa_interface *ifaces, *iface;
132 int iface_count, exitcode = -1;
133 struct wpa_params params;
134 struct wpa_global *global;
135
136 if (os_program_init())
137 return -1;
138
139 os_memset(¶ms, 0, sizeof(params));
140 params.wpa_debug_level = MSG_INFO;
141
142 iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
143 if (ifaces == NULL)
144 return -1;
145 iface_count = 1;
146
147 wpa_supplicant_fd_workaround();
148
149 for (;;) {
150 c = getopt(argc, argv, "b:Bc:C:D:df:g:hi:KLNp:P:qtuvwW");
151 if (c < 0)
152 break;
153 switch (c) {
154 case 'b':
155 iface->bridge_ifname = optarg;
156 break;
157 case 'B':
158 params.daemonize++;
159 break;
160 case 'c':
161 iface->confname = optarg;
162 break;
163 case 'C':
164 iface->ctrl_interface = optarg;
165 break;
166 case 'D':
167 iface->driver = optarg;
168 break;
169 case 'd':
170 #ifdef CONFIG_NO_STDOUT_DEBUG
171 printf("Debugging disabled with "
172 "CONFIG_NO_STDOUT_DEBUG=y build time "
173 "option.\n");
174 goto out;
175 #else /* CONFIG_NO_STDOUT_DEBUG */
176 params.wpa_debug_level--;
177 break;
178 #endif /* CONFIG_NO_STDOUT_DEBUG */
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 'p':
202 iface->driver_param = optarg;
203 break;
204 case 'P':
205 os_free(params.pid_file);
206 params.pid_file = os_rel2abs_path(optarg);
207 break;
208 case 'q':
209 params.wpa_debug_level++;
210 break;
211 case 't':
212 params.wpa_debug_timestamp++;
213 break;
214 #ifdef CONFIG_CTRL_IFACE_DBUS
215 case 'u':
216 params.dbus_ctrl_interface = 1;
217 break;
218 #endif /* CONFIG_CTRL_IFACE_DBUS */
219 case 'v':
220 printf("%s\n", wpa_supplicant_version);
221 exitcode = 0;
222 goto out;
223 case 'w':
224 params.wait_for_interface++;
225 break;
226 case 'W':
227 params.wait_for_monitor++;
228 break;
229 case 'N':
230 iface_count++;
231 iface = os_realloc(ifaces, iface_count *
232 sizeof(struct wpa_interface));
233 if (iface == NULL)
234 goto out;
235 ifaces = iface;
236 iface = &ifaces[iface_count - 1];
237 os_memset(iface, 0, sizeof(*iface));
238 break;
239 default:
240 usage();
241 exitcode = 0;
242 goto out;
243 }
244 }
245
246 exitcode = 0;
247 global = wpa_supplicant_init(¶ms);
248 if (global == NULL) {
249 printf("Failed to initialize wpa_supplicant\n");
250 exitcode = -1;
251 goto out;
252 }
253
254 for (i = 0; exitcode == 0 && i < iface_count; i++) {
255 if ((ifaces[i].confname == NULL &&
256 ifaces[i].ctrl_interface == NULL) ||
257 ifaces[i].ifname == NULL) {
258 if (iface_count == 1 && (params.ctrl_interface ||
259 params.dbus_ctrl_interface))
260 break;
261 usage();
262 exitcode = -1;
263 break;
264 }
265 if (wpa_supplicant_add_iface(global, &ifaces[i]) == NULL)
266 exitcode = -1;
267 }
268
269 if (exitcode == 0)
270 exitcode = wpa_supplicant_run(global);
271
272 wpa_supplicant_deinit(global);
273
274 out:
275 os_free(ifaces);
276 os_free(params.pid_file);
277
278 os_program_deinit();
279
280 return exitcode;
281 }
282