1 /*
2 * WPA Supplicant / main() function for UNIX like OSes and MinGW
3 * Copyright (c) 2003-2013, 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 "crypto/crypto.h"
16 #include "fst/fst.h"
17 #include "wpa_supplicant_i.h"
18 #include "driver_i.h"
19 #include "p2p_supplicant.h"
20
21
usage(void)22 static void usage(void)
23 {
24 int i;
25 printf("%s\n\n%s\n"
26 "usage:\n"
27 " wpa_supplicant [-BddhKLqq"
28 #ifdef CONFIG_DEBUG_SYSLOG
29 "s"
30 #endif /* CONFIG_DEBUG_SYSLOG */
31 "t"
32 #ifdef CONFIG_CTRL_IFACE_DBUS_NEW
33 "u"
34 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
35 "vW] [-P<pid file>] "
36 "[-g<global ctrl>] \\\n"
37 " [-G<group>] \\\n"
38 " -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
39 "[-p<driver_param>] \\\n"
40 " [-b<br_ifname>] [-e<entropy file>]"
41 #ifdef CONFIG_DEBUG_FILE
42 " [-f<debug file>]"
43 #endif /* CONFIG_DEBUG_FILE */
44 " \\\n"
45 " [-o<override driver>] [-O<override ctrl>] \\\n"
46 " [-N -i<ifname> -c<conf> [-C<ctrl>] "
47 "[-D<driver>] \\\n"
48 #ifdef CONFIG_P2P
49 " [-m<P2P Device config file>] \\\n"
50 #endif /* CONFIG_P2P */
51 " [-p<driver_param>] [-b<br_ifname>] [-I<config file>] "
52 "...]\n"
53 "\n"
54 "drivers:\n",
55 wpa_supplicant_version, wpa_supplicant_license);
56
57 for (i = 0; wpa_drivers[i]; i++) {
58 printf(" %s = %s\n",
59 wpa_drivers[i]->name,
60 wpa_drivers[i]->desc);
61 }
62
63 #ifndef CONFIG_NO_STDOUT_DEBUG
64 printf("options:\n"
65 " -b = optional bridge interface name\n"
66 " -B = run daemon in the background\n"
67 " -c = Configuration file\n"
68 " -C = ctrl_interface parameter (only used if -c is not)\n"
69 " -d = increase debugging verbosity (-dd even more)\n"
70 " -D = driver name (can be multiple drivers: nl80211,wext)\n"
71 " -e = entropy file\n"
72 #ifdef CONFIG_DEBUG_FILE
73 " -f = log output to debug file instead of stdout\n"
74 #endif /* CONFIG_DEBUG_FILE */
75 " -g = global ctrl_interface\n"
76 " -G = global ctrl_interface group\n"
77 " -h = show this help text\n"
78 " -i = interface name\n"
79 " -I = additional configuration file\n"
80 " -K = include keys (passwords, etc.) in debug output\n"
81 " -L = show license (BSD)\n"
82 #ifdef CONFIG_P2P
83 " -m = Configuration file for the P2P Device interface\n"
84 #endif /* CONFIG_P2P */
85 #ifdef CONFIG_MATCH_IFACE
86 " -M = start describing new matching interface\n"
87 #endif /* CONFIG_MATCH_IFACE */
88 " -N = start describing new interface\n"
89 " -o = override driver parameter for new interfaces\n"
90 " -O = override ctrl_interface parameter for new interfaces\n"
91 " -p = driver parameters\n"
92 " -P = PID file\n"
93 " -q = decrease debugging verbosity (-qq even less)\n"
94 #ifdef CONFIG_DEBUG_SYSLOG
95 " -s = log output to syslog instead of stdout\n"
96 #endif /* CONFIG_DEBUG_SYSLOG */
97 " -t = include timestamp in debug messages\n"
98 #ifdef CONFIG_DEBUG_LINUX_TRACING
99 " -T = record to Linux tracing in addition to logging\n"
100 " (records all messages regardless of debug verbosity)\n"
101 #endif /* CONFIG_DEBUG_LINUX_TRACING */
102 #ifdef CONFIG_CTRL_IFACE_DBUS_NEW
103 " -u = enable DBus control interface\n"
104 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
105 " -v = show version\n"
106 " -W = wait for a control interface monitor before starting\n");
107
108 printf("example:\n"
109 " wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
110 wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
111 #endif /* CONFIG_NO_STDOUT_DEBUG */
112 }
113
114
license(void)115 static void license(void)
116 {
117 #ifndef CONFIG_NO_STDOUT_DEBUG
118 printf("%s\n\n%s%s%s%s%s\n",
119 wpa_supplicant_version,
120 wpa_supplicant_full_license1,
121 wpa_supplicant_full_license2,
122 wpa_supplicant_full_license3,
123 wpa_supplicant_full_license4,
124 wpa_supplicant_full_license5);
125 #endif /* CONFIG_NO_STDOUT_DEBUG */
126 }
127
128
wpa_supplicant_fd_workaround(int start)129 static void wpa_supplicant_fd_workaround(int start)
130 {
131 #ifdef __linux__
132 static int fd[3] = { -1, -1, -1 };
133 int i;
134 /* When started from pcmcia-cs scripts, wpa_supplicant might start with
135 * fd 0, 1, and 2 closed. This will cause some issues because many
136 * places in wpa_supplicant are still printing out to stdout. As a
137 * workaround, make sure that fd's 0, 1, and 2 are not used for other
138 * sockets. */
139 if (start) {
140 for (i = 0; i < 3; i++) {
141 fd[i] = open("/dev/null", O_RDWR);
142 if (fd[i] > 2) {
143 close(fd[i]);
144 fd[i] = -1;
145 break;
146 }
147 }
148 } else {
149 for (i = 0; i < 3; i++) {
150 if (fd[i] >= 0) {
151 close(fd[i]);
152 fd[i] = -1;
153 }
154 }
155 }
156 #endif /* __linux__ */
157 }
158
159
160 #ifdef CONFIG_MATCH_IFACE
wpa_supplicant_init_match(struct wpa_global * global)161 static int wpa_supplicant_init_match(struct wpa_global *global)
162 {
163 /*
164 * The assumption is that the first driver is the primary driver and
165 * will handle the arrival / departure of interfaces.
166 */
167 if (wpa_drivers[0]->global_init && !global->drv_priv[0]) {
168 global->drv_priv[0] = wpa_drivers[0]->global_init(global);
169 if (!global->drv_priv[0]) {
170 wpa_printf(MSG_ERROR,
171 "Failed to initialize driver '%s'",
172 wpa_drivers[0]->name);
173 return -1;
174 }
175 }
176
177 return 0;
178 }
179 #endif /* CONFIG_MATCH_IFACE */
180
181
main(int argc,char * argv[])182 int main(int argc, char *argv[])
183 {
184 int c, i;
185 struct wpa_interface *ifaces, *iface;
186 int iface_count, exitcode = -1;
187 struct wpa_params params;
188 struct wpa_global *global;
189
190 if (os_program_init())
191 return -1;
192
193 os_memset(¶ms, 0, sizeof(params));
194 params.wpa_debug_level = MSG_INFO;
195
196 iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
197 if (ifaces == NULL)
198 return -1;
199 iface_count = 1;
200
201 wpa_supplicant_fd_workaround(1);
202
203 for (;;) {
204 c = getopt(argc, argv,
205 "b:Bc:C:D:de:f:g:G:hi:I:KLMm:No:O:p:P:qsTtuvW");
206 if (c < 0)
207 break;
208 switch (c) {
209 case 'b':
210 iface->bridge_ifname = optarg;
211 break;
212 case 'B':
213 params.daemonize++;
214 break;
215 case 'c':
216 iface->confname = optarg;
217 break;
218 case 'C':
219 iface->ctrl_interface = optarg;
220 break;
221 case 'D':
222 iface->driver = optarg;
223 break;
224 case 'd':
225 #ifdef CONFIG_NO_STDOUT_DEBUG
226 printf("Debugging disabled with "
227 "CONFIG_NO_STDOUT_DEBUG=y build time "
228 "option.\n");
229 goto out;
230 #else /* CONFIG_NO_STDOUT_DEBUG */
231 params.wpa_debug_level--;
232 break;
233 #endif /* CONFIG_NO_STDOUT_DEBUG */
234 case 'e':
235 params.entropy_file = optarg;
236 break;
237 #ifdef CONFIG_DEBUG_FILE
238 case 'f':
239 params.wpa_debug_file_path = optarg;
240 break;
241 #endif /* CONFIG_DEBUG_FILE */
242 case 'g':
243 params.ctrl_interface = optarg;
244 break;
245 case 'G':
246 params.ctrl_interface_group = optarg;
247 break;
248 case 'h':
249 usage();
250 exitcode = 0;
251 goto out;
252 case 'i':
253 iface->ifname = optarg;
254 break;
255 case 'I':
256 iface->confanother = optarg;
257 break;
258 case 'K':
259 params.wpa_debug_show_keys++;
260 break;
261 case 'L':
262 license();
263 exitcode = 0;
264 goto out;
265 #ifdef CONFIG_P2P
266 case 'm':
267 params.conf_p2p_dev = optarg;
268 break;
269 #endif /* CONFIG_P2P */
270 case 'o':
271 params.override_driver = optarg;
272 break;
273 case 'O':
274 params.override_ctrl_interface = optarg;
275 break;
276 case 'p':
277 iface->driver_param = optarg;
278 break;
279 case 'P':
280 os_free(params.pid_file);
281 params.pid_file = os_rel2abs_path(optarg);
282 break;
283 case 'q':
284 params.wpa_debug_level++;
285 break;
286 #ifdef CONFIG_DEBUG_SYSLOG
287 case 's':
288 params.wpa_debug_syslog++;
289 break;
290 #endif /* CONFIG_DEBUG_SYSLOG */
291 #ifdef CONFIG_DEBUG_LINUX_TRACING
292 case 'T':
293 params.wpa_debug_tracing++;
294 break;
295 #endif /* CONFIG_DEBUG_LINUX_TRACING */
296 case 't':
297 params.wpa_debug_timestamp++;
298 break;
299 #ifdef CONFIG_CTRL_IFACE_DBUS_NEW
300 case 'u':
301 params.dbus_ctrl_interface = 1;
302 break;
303 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
304 case 'v':
305 printf("%s\n", wpa_supplicant_version);
306 exitcode = 0;
307 goto out;
308 case 'W':
309 params.wait_for_monitor++;
310 break;
311 #ifdef CONFIG_MATCH_IFACE
312 case 'M':
313 params.match_iface_count++;
314 iface = os_realloc_array(params.match_ifaces,
315 params.match_iface_count,
316 sizeof(struct wpa_interface));
317 if (!iface)
318 goto out;
319 params.match_ifaces = iface;
320 iface = ¶ms.match_ifaces[params.match_iface_count -
321 1];
322 os_memset(iface, 0, sizeof(*iface));
323 break;
324 #endif /* CONFIG_MATCH_IFACE */
325 case 'N':
326 iface_count++;
327 iface = os_realloc_array(ifaces, iface_count,
328 sizeof(struct wpa_interface));
329 if (iface == NULL)
330 goto out;
331 ifaces = iface;
332 iface = &ifaces[iface_count - 1];
333 os_memset(iface, 0, sizeof(*iface));
334 break;
335 default:
336 usage();
337 exitcode = 0;
338 goto out;
339 }
340 }
341
342 exitcode = 0;
343 global = wpa_supplicant_init(¶ms);
344 if (global == NULL) {
345 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
346 exitcode = -1;
347 goto out;
348 } else {
349 wpa_printf(MSG_INFO, "Successfully initialized "
350 "wpa_supplicant");
351 }
352
353 if (fst_global_init()) {
354 wpa_printf(MSG_ERROR, "Failed to initialize FST");
355 exitcode = -1;
356 goto out;
357 }
358
359 #if defined(CONFIG_FST) && defined(CONFIG_CTRL_IFACE)
360 if (!fst_global_add_ctrl(fst_ctrl_cli))
361 wpa_printf(MSG_WARNING, "Failed to add CLI FST ctrl");
362 #endif
363
364 for (i = 0; exitcode == 0 && i < iface_count; i++) {
365 struct wpa_supplicant *wpa_s;
366
367 if ((ifaces[i].confname == NULL &&
368 ifaces[i].ctrl_interface == NULL) ||
369 ifaces[i].ifname == NULL) {
370 if (iface_count == 1 && (params.ctrl_interface ||
371 #ifdef CONFIG_MATCH_IFACE
372 params.match_iface_count ||
373 #endif /* CONFIG_MATCH_IFACE */
374 params.dbus_ctrl_interface))
375 break;
376 usage();
377 exitcode = -1;
378 break;
379 }
380 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
381 if (wpa_s == NULL) {
382 exitcode = -1;
383 break;
384 }
385 }
386
387 #ifdef CONFIG_MATCH_IFACE
388 if (exitcode == 0)
389 exitcode = wpa_supplicant_init_match(global);
390 #endif /* CONFIG_MATCH_IFACE */
391
392 if (exitcode == 0)
393 exitcode = wpa_supplicant_run(global);
394
395 wpa_supplicant_deinit(global);
396
397 fst_global_deinit();
398
399 out:
400 wpa_supplicant_fd_workaround(0);
401 os_free(ifaces);
402 #ifdef CONFIG_MATCH_IFACE
403 os_free(params.match_ifaces);
404 #endif /* CONFIG_MATCH_IFACE */
405 os_free(params.pid_file);
406
407 crypto_unload();
408 os_program_deinit();
409
410 return exitcode;
411 }
412