Add more D-Bus helpers

1 files changed, 175 insertions, 0 deletions

diff --git a/common/dbus-helper.c b/common/dbus-helper.c
new file mode 100644
index 00000000..bb6e7102
--- /dev/null
+++ b/common/dbus-helper.c
@@ -0,0 +1,175 @@
+/*
+ *
+ *  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 "logging.h"
+
+#include "dbus-helper.h"
+
+struct generic_data {
+	void *user_data;
+	DBusObjectPathUnregisterFunction unregister_function;
+	const char *interface;
+	DBusMethodVTable *methods;
+	char *introspect;
+};
+
+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 DBusHandlerResult generic_message(DBusConnection *connection,
+					DBusMessage *message, void *user_data)
+{
+	struct generic_data *data = user_data;
+	DBusMethodVTable *current;
+
+	if (dbus_message_is_method_call(message, DBUS_INTERFACE_INTROSPECTABLE,
+							"Introspect") == TRUE)
+		return introspect(connection, message, data);
+
+	for (current = data->methods;
+			current->name && current->message_function; current++) {
+		if (dbus_message_is_method_call(message,
+				data->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,
+};
+
+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;
+
+	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);
+}
+
+static char simple_xml[] = DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node></node>";
+
+dbus_bool_t dbus_connection_register_interface(DBusConnection *connection,
+					const char *path, const char *interface,
+					DBusMethodVTable *methods,
+					DBusPropertyVTable *properties)
+{
+	struct generic_data *data;
+	DBusMethodVTable *current;
+
+	if (dbus_connection_get_object_path_data(connection, path,
+						(void *) &data) == FALSE)
+		return FALSE;
+
+	data->interface = interface;
+	data->methods = methods;
+
+	for (current = data->methods; current->name; current++) {
+		debug("Adding introspection data for %s.%s",
+						interface, current->name);
+	}
+
+	data->introspect = simple_xml;
+
+	return TRUE;
+}