aboutsummaryrefslogtreecommitdiffstats
path: root/wpa_supplicant/dbus/dbus_old.c
blob: 88227af7c03b8a1240e2cf946de0ecbbf3dc63e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
/*
 * WPA Supplicant / dbus-based control interface
 * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"
#include <dbus/dbus.h>

#include "common.h"
#include "eloop.h"
#include "wps/wps.h"
#include "../config.h"
#include "../wpa_supplicant_i.h"
#include "../bss.h"
#include "dbus_old.h"
#include "dbus_old_handlers.h"
#include "dbus_common_i.h"


/**
 * wpas_dbus_decompose_object_path - Decompose an interface object path into parts
 * @path: The dbus object path
 * @network: (out) the configured network this object path refers to, if any
 * @bssid: (out) the scanned bssid this object path refers to, if any
 * Returns: The object path of the network interface this path refers to
 *
 * For a given object path, decomposes the object path into object id, network,
 * and BSSID parts, if those parts exist.
 */
char * wpas_dbus_decompose_object_path(const char *path, char **network,
				       char **bssid)
{
	const unsigned int dev_path_prefix_len =
		strlen(WPAS_DBUS_PATH_INTERFACES "/");
	char *obj_path_only;
	char *next_sep;

	/* Be a bit paranoid about path */
	if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
			     dev_path_prefix_len))
		return NULL;

	/* Ensure there's something at the end of the path */
	if ((path + dev_path_prefix_len)[0] == '\0')
		return NULL;

	obj_path_only = os_strdup(path);
	if (obj_path_only == NULL)
		return NULL;

	next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
	if (next_sep != NULL) {
		const char *net_part = strstr(next_sep,
					      WPAS_DBUS_NETWORKS_PART "/");
		const char *bssid_part = strstr(next_sep,
						WPAS_DBUS_BSSIDS_PART "/");

		if (network && net_part) {
			/* Deal with a request for a configured network */
			const char *net_name = net_part +
				strlen(WPAS_DBUS_NETWORKS_PART "/");
			*network = NULL;
			if (strlen(net_name))
				*network = os_strdup(net_name);
		} else if (bssid && bssid_part) {
			/* Deal with a request for a scanned BSSID */
			const char *bssid_name = bssid_part +
				strlen(WPAS_DBUS_BSSIDS_PART "/");
			if (strlen(bssid_name))
				*bssid = os_strdup(bssid_name);
			else
				*bssid = NULL;
		}

		/* Cut off interface object path before "/" */
		*next_sep = '\0';
	}

	return obj_path_only;
}


/**
 * wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
 * @message: Pointer to incoming dbus message this error refers to
 * Returns: A dbus error message
 *
 * Convenience function to create and return an invalid interface error
 */
DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
{
	return dbus_message_new_error(
		message, WPAS_ERROR_INVALID_IFACE,
		"wpa_supplicant knows nothing about this interface.");
}


/**
 * wpas_dbus_new_invalid_network_error - Return a new invalid network error message
 * @message: Pointer to incoming dbus message this error refers to
 * Returns: a dbus error message
 *
 * Convenience function to create and return an invalid network error
 */
DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
{
	return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
				      "The requested network does not exist.");
}


/**
 * wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
 * @message: Pointer to incoming dbus message this error refers to
 * Returns: a dbus error message
 *
 * Convenience function to create and return an invalid bssid error
 */
static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
{
	return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
				      "The BSSID requested was invalid.");
}


/**
 * wpas_dispatch_network_method - dispatch messages for configured networks
 * @message: the incoming dbus message
 * @wpa_s: a network interface's data
 * @network_id: id of the configured network we're interested in
 * Returns: a reply dbus message, or a dbus error message
 *
 * This function dispatches all incoming dbus messages for configured networks.
 */
static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
						  struct wpa_supplicant *wpa_s,
						  int network_id)
{
	DBusMessage *reply = NULL;
	const char *method = dbus_message_get_member(message);
	struct wpa_ssid *ssid;

	ssid = wpa_config_get_network(wpa_s->conf, network_id);
	if (ssid == NULL)
		return wpas_dbus_new_invalid_network_error(message);

	if (!strcmp(method, "set"))
		reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
	else if (!strcmp(method, "enable"))
		reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
	else if (!strcmp(method, "disable"))
		reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);

	return reply;
}


/**
 * wpas_dispatch_bssid_method - dispatch messages for scanned networks
 * @message: the incoming dbus message
 * @wpa_s: a network interface's data
 * @bssid: bssid of the scanned network we're interested in
 * Returns: a reply dbus message, or a dbus error message
 *
 * This function dispatches all incoming dbus messages for scanned networks.
 */
static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
						struct wpa_supplicant *wpa_s,
						const char *bssid_txt)
{
	u8 bssid[ETH_ALEN];
	struct wpa_bss *bss;

	if (hexstr2bin(bssid_txt, bssid, ETH_ALEN) < 0)
		return wpas_dbus_new_invalid_bssid_error(message);

	bss = wpa_bss_get_bssid(wpa_s, bssid);
	if (bss == NULL)
		return wpas_dbus_new_invalid_bssid_error(message);

	/* Dispatch the method call against the scanned bssid */
	if (os_strcmp(dbus_message_get_member(message), "properties") == 0)
		return wpas_dbus_bssid_properties(message, wpa_s, bss);

	return NULL;
}


/**
 * wpas_iface_message_handler - Dispatch messages for interfaces or networks
 * @connection: Connection to the system message bus
 * @message: An incoming dbus message
 * @user_data: A pointer to a dbus control interface data structure
 * Returns: Whether or not the message was handled
 *
 * This function dispatches all incoming dbus messages for network interfaces,
 * or objects owned by them, such as scanned BSSIDs and configured networks.
 */
static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
						    DBusMessage *message,
						    void *user_data)
{
	struct wpa_supplicant *wpa_s = user_data;
	const char *method = dbus_message_get_member(message);
	const char *path = dbus_message_get_path(message);
	const char *msg_interface = dbus_message_get_interface(message);
	char *iface_obj_path = NULL;
	char *network = NULL;
	char *bssid = NULL;
	DBusMessage *reply = NULL;

	/* Caller must specify a message interface */
	if (!msg_interface)
		goto out;

	wpa_printf(MSG_MSGDUMP, "dbus[old/iface]: %s.%s (%s) [%s]",
		   msg_interface, method, path,
		   dbus_message_get_signature(message));

	iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
							 &bssid);
	if (iface_obj_path == NULL) {
		reply = wpas_dbus_new_invalid_iface_error(message);
		goto out;
	}

	/* Make sure the message's object path actually refers to the
	 * wpa_supplicant structure it's supposed to (which is wpa_s)
	 */
	if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
						  iface_obj_path) != wpa_s) {
		reply = wpas_dbus_new_invalid_iface_error(message);
		goto out;
	}

	if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
		/* A method for one of this interface's configured networks */
		int nid = strtoul(network, NULL, 10);

		if (errno != EINVAL)
			reply = wpas_dispatch_network_method(message, wpa_s,
							     nid);
		else
			reply = wpas_dbus_new_invalid_network_error(message);
	} else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
		/* A method for one of this interface's scanned BSSIDs */
		reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
	} else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
		/* A method for an interface only. */
		if (!strcmp(method, "scan"))
			reply = wpas_dbus_iface_scan(message, wpa_s);
		else if (!strcmp(method, "scanResults"))
			reply = wpas_dbus_iface_scan_results(message, wpa_s);
		else if (!strcmp(method, "addNetwork"))
			reply = wpas_dbus_iface_add_network(message, wpa_s);
		else if (!strcmp(method, "removeNetwork"))
			reply = wpas_dbus_iface_remove_network(message, wpa_s);
		else if (!strcmp(method, "selectNetwork"))
			reply = wpas_dbus_iface_select_network(message, wpa_s);
		else if (!strcmp(method, "capabilities"))
			reply = wpas_dbus_iface_capabilities(message, wpa_s);
		else if (!strcmp(method, "disconnect"))
			reply = wpas_dbus_iface_disconnect(message, wpa_s);
		else if (!strcmp(method, "setAPScan"))
			reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
		else if (!strcmp(method, "setSmartcardModules"))
			reply = wpas_dbus_iface_set_smartcard_modules(message,
								      wpa_s);
		else if (!strcmp(method, "state"))
			reply = wpas_dbus_iface_get_state(message, wpa_s);
		else if (!strcmp(method, "scanning"))
			reply = wpas_dbus_iface_get_scanning(message, wpa_s);
#ifndef CONFIG_NO_CONFIG_BLOBS
		else if (!strcmp(method, "setBlobs"))
			reply = wpas_dbus_iface_set_blobs(message, wpa_s);
		else if (!strcmp(method, "removeBlobs"))
			reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
#endif /* CONFIG_NO_CONFIG_BLOBS */
#ifdef CONFIG_WPS
		else if (os_strcmp(method, "wpsPbc") == 0)
			reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
		else if (os_strcmp(method, "wpsPin") == 0)
			reply = wpas_dbus_iface_wps_pin(message, wpa_s);
		else if (os_strcmp(method, "wpsReg") == 0)
			reply = wpas_dbus_iface_wps_reg(message, wpa_s);
#endif /* CONFIG_WPS */
		else if (os_strcmp(method, "flush") == 0)
			reply = wpas_dbus_iface_flush(message, wpa_s);
	}

	/* If the message was handled, send back the reply */
out:
	if (reply) {
		if (!dbus_message_get_no_reply(message))
			dbus_connection_send(connection, reply, NULL);
		dbus_message_unref(reply);
	}

	os_free(iface_obj_path);
	os_free(network);
	os_free(bssid);
	return reply ? DBUS_HANDLER_RESULT_HANDLED :
		DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}


/**
 * wpas_message_handler - dispatch incoming dbus messages
 * @connection: connection to the system message bus
 * @message: an incoming dbus message
 * @user_data: a pointer to a dbus control interface data structure
 * Returns: whether or not the message was handled
 *
 * This function dispatches all incoming dbus messages to the correct
 * handlers, depending on what the message's target object path is,
 * and what the method call is.
 */
static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
	DBusMessage *message, void *user_data)
{
	struct wpas_dbus_priv *ctrl_iface = user_data;
	const char *method;
	const char *path;
	const char *msg_interface;
	DBusMessage *reply = NULL;

	method = dbus_message_get_member(message);
	path = dbus_message_get_path(message);
	msg_interface = dbus_message_get_interface(message);
	if (!method || !path || !ctrl_iface || !msg_interface)
		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

	wpa_printf(MSG_MSGDUMP, "dbus[old]: %s.%s (%s) [%s]",
		   msg_interface, method, path,
		   dbus_message_get_signature(message));

	/* Validate the method interface */
	if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

	if (!strcmp(path, WPAS_DBUS_PATH)) {
		/* dispatch methods against our global dbus interface here */
		if (!strcmp(method, "addInterface")) {
			reply = wpas_dbus_global_add_interface(
				message, ctrl_iface->global);
		} else if (!strcmp(method, "removeInterface")) {
			reply = wpas_dbus_global_remove_interface(
				message, ctrl_iface->global);
		} else if (!strcmp(method, "getInterface")) {
			reply = wpas_dbus_global_get_interface(
				message, ctrl_iface->global);
		} else if (!strcmp(method, "setDebugParams")) {
			reply = wpas_dbus_global_set_debugparams(
				message, ctrl_iface->global);
		}
	}

	/* If the message was handled, send back the reply */
	if (reply) {
		if (!dbus_message_get_no_reply(message))
			dbus_connection_send(connection, reply, NULL);
		dbus_message_unref(reply);
	}

	return reply ? DBUS_HANDLER_RESULT_HANDLED :
		DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}


/**
 * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 * @wpa_s: %wpa_supplicant network interface data
 * Returns: 0 on success, -1 on failure
 *
 * Notify listeners that this interface has updated scan results.
 */
void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
{
	struct wpas_dbus_priv *iface = wpa_s->global->dbus;
	DBusMessage *_signal;

	/* Do nothing if the control interface is not turned on */
	if (iface == NULL || !wpa_s->dbus_path)
		return;

	_signal = dbus_message_new_signal(wpa_s->dbus_path,
					  WPAS_DBUS_IFACE_INTERFACE,
					  "ScanResultsAvailable");
	if (_signal == NULL) {
		wpa_printf(MSG_ERROR,
			   "dbus: Not enough memory to send scan results signal");
		return;
	}
	dbus_connection_send(iface->con, _signal, NULL);
	dbus_message_unref(_signal);
}


/**
 * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 * @wpa_s: %wpa_supplicant network interface data
 * @new_state: new state wpa_supplicant is entering
 * @old_state: old state wpa_supplicant is leaving
 * Returns: 0 on success, -1 on failure
 *
 * Notify listeners that wpa_supplicant has changed state
 */
void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
					     enum wpa_states new_state,
					     enum wpa_states old_state)
{
	struct wpas_dbus_priv *iface;
	DBusMessage *_signal = NULL;
	const char *new_state_str, *old_state_str;

	if (wpa_s->dbus_path == NULL)
		return; /* Skip signal since D-Bus setup is not yet ready */

	/* Do nothing if the control interface is not turned on */
	if (wpa_s->global == NULL)
		return;
	iface = wpa_s->global->dbus;
	if (iface == NULL)
		return;

	/* Only send signal if state really changed */
	if (new_state == old_state)
		return;

	_signal = dbus_message_new_signal(wpa_s->dbus_path,
					  WPAS_DBUS_IFACE_INTERFACE,
					  "StateChange");
	if (_signal == NULL) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: could not create dbus signal; likely out of memory",
			   __func__);
		return;
	}

	new_state_str = wpa_supplicant_state_txt(new_state);
	old_state_str = wpa_supplicant_state_txt(old_state);

	if (!dbus_message_append_args(_signal,
				      DBUS_TYPE_STRING, &new_state_str,
				      DBUS_TYPE_STRING, &old_state_str,
				      DBUS_TYPE_INVALID)) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: Not enough memory to construct state change signal",
			   __func__);
		goto out;
	}

	dbus_connection_send(iface->con, _signal, NULL);

out:
	dbus_message_unref(_signal);
}


/**
 * wpa_supplicant_dbus_notify_scanning - send scanning status
 * @wpa_s: %wpa_supplicant network interface data
 * Returns: 0 on success, -1 on failure
 *
 * Notify listeners of interface scanning state changes
 */
void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
{
	struct wpas_dbus_priv *iface = wpa_s->global->dbus;
	DBusMessage *_signal;
	dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;

	/* Do nothing if the control interface is not turned on */
	if (iface == NULL || !wpa_s->dbus_path)
		return;

	_signal = dbus_message_new_signal(wpa_s->dbus_path,
					  WPAS_DBUS_IFACE_INTERFACE,
					  "Scanning");
	if (_signal == NULL) {
		wpa_printf(MSG_ERROR,
			   "dbus: Not enough memory to send scan results signal");
		return;
	}

	if (dbus_message_append_args(_signal,
				     DBUS_TYPE_BOOLEAN, &scanning,
				     DBUS_TYPE_INVALID)) {
		dbus_connection_send(iface->con, _signal, NULL);
	} else {
		wpa_printf(MSG_ERROR,
			   "dbus: Not enough memory to construct signal");
	}
	dbus_message_unref(_signal);
}


#ifdef CONFIG_WPS
void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
					 const struct wps_credential *cred)
{
	struct wpas_dbus_priv *iface;
	DBusMessage *_signal = NULL;

	/* Do nothing if the control interface is not turned on */
	if (wpa_s->global == NULL)
		return;
	iface = wpa_s->global->dbus;
	if (iface == NULL || !wpa_s->dbus_path)
		return;

	_signal = dbus_message_new_signal(wpa_s->dbus_path,
					  WPAS_DBUS_IFACE_INTERFACE,
					  "WpsCred");
	if (_signal == NULL) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: Could not create dbus signal; likely out of memory",
			   __func__);
		return;
	}

	if (!dbus_message_append_args(_signal,
				      DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
				      &cred->cred_attr, cred->cred_attr_len,
				      DBUS_TYPE_INVALID)) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: Not enough memory to construct signal",
			   __func__);
		goto out;
	}

	dbus_connection_send(iface->con, _signal, NULL);

out:
	dbus_message_unref(_signal);
}
#else /* CONFIG_WPS */
void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
					 const struct wps_credential *cred)
{
}
#endif /* CONFIG_WPS */

void wpa_supplicant_dbus_notify_certification(struct wpa_supplicant *wpa_s,
					      int depth, const char *subject,
					      const char *cert_hash,
					      const struct wpabuf *cert)
{
	struct wpas_dbus_priv *iface;
	DBusMessage *_signal = NULL;
	const char *hash;
	const char *cert_hex;
	int cert_hex_len;

	/* Do nothing if the control interface is not turned on */
	if (wpa_s->global == NULL)
		return;
	iface = wpa_s->global->dbus;
	if (iface == NULL || !wpa_s->dbus_path)
		return;

	_signal = dbus_message_new_signal(wpa_s->dbus_path,
					  WPAS_DBUS_IFACE_INTERFACE,
					  "Certification");
	if (_signal == NULL) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: Could not create dbus signal; likely out of memory",
			   __func__);
		return;
	}

	hash = cert_hash ? cert_hash : "";
	cert_hex = cert ? wpabuf_head(cert) : "";
	cert_hex_len = cert ? wpabuf_len(cert) : 0;

	if (!dbus_message_append_args(_signal,
				      DBUS_TYPE_INT32, &depth,
				      DBUS_TYPE_STRING, &subject,
				      DBUS_TYPE_STRING, &hash,
				      DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
				      &cert_hex, cert_hex_len,
				      DBUS_TYPE_INVALID)) {
		wpa_printf(MSG_ERROR,
			   "dbus: %s: Not enough memory to construct signal",
			   __func__);
		goto out;
	}

	dbus_connection_send(iface->con, _signal, NULL);

out:
	dbus_message_unref(_signal);

}


/**
 * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 * @global: Pointer to global data from wpa_supplicant_init()
 * Returns: 0 on success, -1 on failure
 *
 * Initialize the dbus control interface and start receiving commands from
 * external programs over the bus.
 */
int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
{
	DBusError error;
	int ret = -1;
	DBusObjectPathVTable wpas_vtable = {
		NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
	};

	/* Register the message handler for the global dbus interface */
	if (!dbus_connection_register_object_path(iface->con,
						  WPAS_DBUS_PATH, &wpas_vtable,
						  iface)) {
		wpa_printf(MSG_ERROR, "dbus: Could not set up message handler");
		return -1;
	}

	/* Register our service with the message bus */
	dbus_error_init(&error);
	switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
				      0, &error)) {
	case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
		ret = 0;
		break;
	case DBUS_REQUEST_NAME_REPLY_EXISTS:
	case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
	case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
		wpa_printf(MSG_ERROR,
			   "dbus: Could not request service name: already registered");
		break;
	default:
		wpa_printf(MSG_ERROR,
			   "dbus: Could not request service name: %s %s",
			   error.name, error.message);
		break;
	}
	dbus_error_free(&error);

	if (ret != 0)
		return -1;

	wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
		   "'.");

	return 0;
}


/**
 * wpas_dbus_register_new_iface - Register a new interface with dbus
 * @wpa_s: %wpa_supplicant interface description structure to register
 * Returns: 0 on success, -1 on error
 *
 * Registers a new interface with dbus and assigns it a dbus object path.
 */
int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
{
	struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
	DBusConnection * con;
	u32 next;
	DBusObjectPathVTable vtable = {
		NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
	};

	/* Do nothing if the control interface is not turned on */
	if (ctrl_iface == NULL)
		return 0;

	con = ctrl_iface->con;
	next = ctrl_iface->next_objid++;

	/* Create and set the interface's object path */
	wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
	if (wpa_s->dbus_path == NULL)
		return -1;
	os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
		    WPAS_DBUS_PATH_INTERFACES "/%u",
		    next);

	/* Register the message handler for the interface functions */
	if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
					       wpa_s)) {
		wpa_printf(MSG_ERROR,
			   "dbus: Could not set up message handler for interface %s",
			   wpa_s->ifname);
		return -1;
	}

	return 0;
}


/**
 * wpas_dbus_unregister_iface - Unregister an interface from dbus
 * @wpa_s: wpa_supplicant interface structure
 * Returns: 0 on success, -1 on failure
 *
 * Unregisters the interface with dbus
 */
int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
{
	struct wpas_dbus_priv *ctrl_iface;
	DBusConnection *con;

	/* Do nothing if the control interface is not turned on */
	if (wpa_s == NULL || wpa_s->global == NULL)
		return 0;
	ctrl_iface = wpa_s->global->dbus;
	if (ctrl_iface == NULL || wpa_s->dbus_path == NULL)
		return 0;

	con = ctrl_iface->con;
	if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
		return -1;

	os_free(wpa_s->dbus_path);
	wpa_s->dbus_path = NULL;

	return 0;
}


/**
 * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 * @global: Pointer to global data from wpa_supplicant_init()
 * @path: Pointer to a dbus object path representing an interface
 * Returns: Pointer to the interface or %NULL if not found
 */
struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
	struct wpa_global *global, const char *path)
{
	struct wpa_supplicant *wpa_s;

	for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
		if (wpa_s->dbus_path && strcmp(wpa_s->dbus_path, path) == 0)
			return wpa_s;
	}
	return NULL;
}