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 #include "driver_i.h"
23
24 extern struct wpa_driver_ops *wpa_drivers[];
25
26
usage(void)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);
45
46 for (i = 0; wpa_drivers[i]; i++) {
47 printf(" %s = %s\n",
48 wpa_drivers[i]->name,
49 wpa_drivers[i]->desc);
50 }
51
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 (GPL and 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");
84
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 }
90
91
license(void)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 */
103 }
104
105
wpa_supplicant_fd_workaround(void)106 static void wpa_supplicant_fd_workaround(void)
107 {
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__ */
123 }
124
125
main(int argc,char * argv[])126 int main(int argc, char *argv[])
127 {
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;
133
134 if (os_program_init())
135 return -1;
136
137 os_memset(¶ms, 0, sizeof(params));
138 params.wpa_debug_level = MSG_INFO;
139
140 iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
141 if (ifaces == NULL)
142 return -1;
143 iface_count = 1;
144
145 wpa_supplicant_fd_workaround();
146
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 }
254
255 exitcode = 0;
256 global = wpa_supplicant_init(¶ms);
257 if (global == NULL) {
258 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
259 exitcode = -1;
260 goto out;
261 }
262
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 }
277
278 if (exitcode == 0)
279 exitcode = wpa_supplicant_run(global);
280
281 wpa_supplicant_deinit(global);
282
283 out:
284 os_free(ifaces);
285 os_free(params.pid_file);
286
287 os_program_deinit();
288
289 return exitcode;
290 }
291