summaryrefslogtreecommitdiffstats
path: root/common/dbus-helper.c
blob: 71d1eeb76da13f4401604dccd5512c65f966845e (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
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2007  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <string.h>

#include <dbus/dbus.h>

#include "glib-ectomy.h"
#include "logging.h"

#include "dbus-helper.h"

struct generic_data {
	void *user_data;
	DBusObjectPathUnregisterFunction unregister_function;
	GSList *interfaces;
	char *introspect;
};

struct interface_data {
	const char *interface;
	DBusMethodVTable *methods;
};

DBusHandlerResult dbus_connection_send_and_unref(DBusConnection *connection,
							DBusMessage *message)
{
	if (message) {
		dbus_connection_send(connection, message, NULL);
		dbus_message_unref(message);
	}

	return DBUS_HANDLER_RESULT_HANDLED;
}

static DBusHandlerResult introspect(DBusConnection *connection,
				DBusMessage *message, struct generic_data *data)
{
	DBusMessage *reply;

	if (dbus_message_has_signature(message,
				DBUS_TYPE_INVALID_AS_STRING) == FALSE) {
		error("Unexpected signature to introspect call");
		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
	}

	if (!data->introspect)
		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

	reply = dbus_message_new_method_return(message);
	if (!reply)
		return DBUS_HANDLER_RESULT_NEED_MEMORY;

	dbus_message_append_args(reply, DBUS_TYPE_STRING, &data->introspect,
					DBUS_TYPE_INVALID);

	return dbus_connection_send_and_unref(connection, reply);
}

static void generic_unregister(DBusConnection *connection, void *user_data)
{
	struct generic_data *data = user_data;

	if (data->unregister_function)
		data->unregister_function(connection, data->user_data);

	free(data);
}

static struct interface_data *find_interface(GSList *interfaces,
							const char *interface)
{
	GSList *list;

	for (list = interfaces; list; list = list->next) {
		struct interface_data *iface = list->data;
		if (!strcmp(interface, iface->interface))
			return iface;
	}

	return NULL;
}

static DBusHandlerResult generic_message(DBusConnection *connection,
					DBusMessage *message, void *user_data)
{
	struct generic_data *data = user_data;
	struct interface_data *iface;
	DBusMethodVTable *current;
	const char *interface;

	if (dbus_message_is_method_call(message, DBUS_INTERFACE_INTROSPECTABLE,
							"Introspect") == TRUE)
		return introspect(connection, message, data);

	interface = dbus_message_get_interface(message);

	iface = find_interface(data->interfaces, interface);
	if (!iface)
		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

	for (current = iface->methods;
			current->name && current->message_function; current++) {
		if (dbus_message_is_method_call(message,
				iface->interface, current->name) == FALSE)
			continue;

		if (dbus_message_has_signature(message,
				current->signature) == TRUE)
			return current->message_function(connection,
						message, data->user_data);
	}

	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}

static DBusObjectPathVTable generic_table = {
	.unregister_function	= generic_unregister,
	.message_function	= generic_message,
};

static char simple_xml[] = DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node></node>";

dbus_bool_t dbus_connection_create_object_path(DBusConnection *connection,
					const char *path, void *user_data,
					DBusObjectPathUnregisterFunction function)
{
	struct generic_data *data;

	data = malloc(sizeof(*data));
	if (!data)
		return FALSE;

	memset(data, 0, sizeof(*data));

	data->user_data = user_data;
	data->unregister_function = function;

	data->interfaces = NULL;
	data->introspect = simple_xml;

	if (dbus_connection_register_object_path(connection, path,
					&generic_table, data) == FALSE) {
		free(data);
		return FALSE;
	}

	return TRUE;
}

dbus_bool_t dbus_connection_destroy_object_path(DBusConnection *connection,
							const char *path)
{
	return dbus_connection_unregister_object_path(connection, path);
}

dbus_bool_t dbus_connection_register_interface(DBusConnection *connection,
					const char *path, const char *interface,
					DBusMethodVTable *methods,
					DBusPropertyVTable *properties)
{
	struct generic_data *data;
	struct interface_data *iface;
	DBusMethodVTable *current;

	if (dbus_connection_get_object_path_data(connection, path,
						(void *) &data) == FALSE)
		return FALSE;

	iface = malloc(sizeof(*iface));
	if (!iface)
		return FALSE;

	memset(iface, 0, sizeof(*iface));

	iface->interface = interface;
	iface->methods = methods;

	for (current = iface->methods; current->name; current++) {
		debug("Adding introspection data for %s.%s",
						interface, current->name);
	}

	data->interfaces = g_slist_append(data->interfaces, iface);

	return TRUE;
}

dbus_bool_t dbus_connection_unregister_interface(DBusConnection *connection,
					const char *path, const char *interface)
{
	return TRUE;
}