--- /dev/null
+/*
+ *
+ * D-Bus helper library
+ *
+ * Copyright (C) 2004-2011 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 <glib.h>
+#include <dbus/dbus.h>
+
+#include "gdbus.h"
+
+struct GDBusClient {
+ gint ref_count;
+ DBusConnection *dbus_conn;
+ char *service_name;
+ char *unique_name;
+ char *base_path;
+ char *match_rules[4];
+ DBusPendingCall *pending_call;
+ GDBusWatchFunction connect_func;
+ void *connect_data;
+ GDBusWatchFunction disconn_func;
+ void *disconn_data;
+ GDBusMessageFunction signal_func;
+ void *signal_data;
+};
+
+static void modify_match_reply(DBusPendingCall *call, void *user_data)
+{
+ DBusMessage *reply = dbus_pending_call_steal_reply(call);
+ DBusError error;
+
+ dbus_error_init(&error);
+
+ if (dbus_set_error_from_message(&error, reply) == TRUE)
+ dbus_error_free(&error);
+
+ dbus_message_unref(reply);
+}
+
+static gboolean modify_match(DBusConnection *conn, const char *member,
+ const char *rule)
+{
+ DBusMessage *msg;
+ DBusPendingCall *call;
+
+ msg = dbus_message_new_method_call(DBUS_SERVICE_DBUS, DBUS_PATH_DBUS,
+ DBUS_INTERFACE_DBUS, member);
+ if (!msg)
+ return FALSE;
+
+ dbus_message_append_args(msg, DBUS_TYPE_STRING, &rule,
+ DBUS_TYPE_INVALID);
+
+ if (dbus_connection_send_with_reply(conn, msg, &call, -1) == FALSE) {
+ dbus_message_unref(msg);
+ return FALSE;
+ }
+
+ dbus_pending_call_set_notify(call, modify_match_reply, NULL, NULL);
+ dbus_pending_call_unref(call);
+
+ dbus_message_unref(msg);
+
+ return TRUE;
+}
+
+static void get_name_owner_reply(DBusPendingCall *call, void *user_data)
+{
+ GDBusClient *client = user_data;
+ DBusMessage *reply = dbus_pending_call_steal_reply(call);
+ DBusError error;
+ const char *name;
+
+ dbus_error_init(&error);
+
+ if (dbus_set_error_from_message(&error, reply) == TRUE) {
+ dbus_error_free(&error);
+ goto done;
+ }
+
+ if (dbus_message_get_args(reply, NULL, DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID) == FALSE)
+ goto done;
+
+ g_free(client->unique_name);
+ client->unique_name = g_strdup(name);
+
+ if (client->connect_func)
+ client->connect_func(client->dbus_conn, client->connect_data);
+
+done:
+ dbus_message_unref(reply);
+
+ dbus_pending_call_unref(client->pending_call);
+ client->pending_call = NULL;
+}
+
+static void get_name_owner(GDBusClient *client, const char *name)
+{
+ DBusMessage *msg;
+
+ msg = dbus_message_new_method_call(DBUS_SERVICE_DBUS, DBUS_PATH_DBUS,
+ DBUS_INTERFACE_DBUS, "GetNameOwner");
+ if (!msg)
+ return;
+
+ dbus_message_append_args(msg, DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID);
+
+ if (dbus_connection_send_with_reply(client->dbus_conn, msg,
+ &client->pending_call, -1) == FALSE) {
+ dbus_message_unref(msg);
+ return;
+ }
+
+ dbus_pending_call_set_notify(client->pending_call,
+ get_name_owner_reply, client, NULL);
+
+ dbus_message_unref(msg);
+}
+
+static DBusHandlerResult message_filter(DBusConnection *connection,
+ DBusMessage *message, void *user_data)
+{
+ GDBusClient *client = user_data;
+ const char *sender;
+
+ if (dbus_message_get_type(message) != DBUS_MESSAGE_TYPE_SIGNAL)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ sender = dbus_message_get_sender(message);
+
+ if (g_str_equal(sender, DBUS_SERVICE_DBUS) == TRUE) {
+ const char *interface, *member;
+ const char *name, *old, *new;
+
+ interface = dbus_message_get_interface(message);
+
+ if (g_str_equal(interface, DBUS_INTERFACE_DBUS) == FALSE)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ member = dbus_message_get_member(message);
+
+ if (g_str_equal(member, "NameOwnerChanged") == FALSE)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ if (dbus_message_get_args(message, NULL,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_STRING, &old,
+ DBUS_TYPE_STRING, &new,
+ DBUS_TYPE_INVALID) == FALSE)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ if (g_str_equal(name, client->service_name) == FALSE)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ if (*new == '\0') {
+ if (client->disconn_func)
+ client->disconn_func(client->dbus_conn,
+ client->disconn_data);
+ g_free(client->unique_name);
+ client->unique_name = NULL;
+ } else if (*old == '\0') {
+ if (client->connect_func)
+ client->connect_func(client->dbus_conn,
+ client->connect_data);
+ g_free(client->unique_name);
+ client->unique_name = g_strdup(new);
+ }
+
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+ }
+
+ if (client->unique_name == NULL)
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+ if (g_str_equal(sender, client->unique_name) == TRUE) {
+ if (client->signal_func)
+ client->signal_func(client->dbus_conn,
+ message, client->signal_data);
+ }
+
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+GDBusClient *g_dbus_client_new(DBusConnection *connection,
+ const char *service, const char *path)
+{
+ GDBusClient *client;
+ int i;
+
+ if (connection == NULL)
+ return NULL;
+
+ client = g_try_new0(GDBusClient, 1);
+ if (client == NULL)
+ return NULL;
+
+ if (dbus_connection_add_filter(connection, message_filter,
+ client, NULL) == FALSE) {
+ g_free(client);
+ return NULL;
+ }
+
+ client->dbus_conn = dbus_connection_ref(connection);
+ client->service_name = g_strdup(service);
+ client->base_path = g_strdup(path);
+
+ get_name_owner(client, client->service_name);
+
+ client->match_rules[0] = g_strdup_printf("type='signal',sender='%s',"
+ "path='%s',interface='%s',"
+ "member='NameOwnerChanged',arg0='%s'",
+ DBUS_SERVICE_DBUS, DBUS_PATH_DBUS,
+ DBUS_INTERFACE_DBUS, client->service_name);
+ client->match_rules[1] = g_strdup_printf("type='signal',sender='%s',"
+ "path='/',interface='%s.ObjectManager',"
+ "member='InterfacesAdded'",
+ client->service_name, DBUS_INTERFACE_DBUS);
+ client->match_rules[2] = g_strdup_printf("type='signal',sender='%s',"
+ "path='/',interface='%s.ObjectManager',"
+ "member='InterfacesRemoved'",
+ client->service_name, DBUS_INTERFACE_DBUS);
+ client->match_rules[3] = g_strdup_printf("type='signal',sender='%s',"
+ "path_namespace='%s'",
+ client->service_name, client->base_path);
+
+ for (i = 0; i < 4; i++)
+ modify_match(client->dbus_conn, "AddMatch",
+ client->match_rules[i]);
+
+ return g_dbus_client_ref(client);
+}
+
+GDBusClient *g_dbus_client_ref(GDBusClient *client)
+{
+ if (client == NULL)
+ return NULL;
+
+ g_atomic_int_inc(&client->ref_count);
+
+ return client;
+}
+
+void g_dbus_client_unref(GDBusClient *client)
+{
+ int i;
+
+ if (client == NULL)
+ return;
+
+ if (g_atomic_int_dec_and_test(&client->ref_count) == FALSE)
+ return;
+
+ if (client->pending_call != NULL) {
+ dbus_pending_call_cancel(client->pending_call);
+ dbus_pending_call_unref(client->pending_call);
+ }
+
+ for (i = 0; i < 4; i++) {
+ modify_match(client->dbus_conn, "RemoveMatch",
+ client->match_rules[i]);
+ g_free(client->match_rules[i]);
+ }
+
+ dbus_connection_remove_filter(client->dbus_conn,
+ message_filter, client);
+
+ if (client->disconn_func)
+ client->disconn_func(client->dbus_conn, client->disconn_data);
+
+ dbus_connection_unref(client->dbus_conn);
+
+ g_free(client->service_name);
+ g_free(client->unique_name);
+ g_free(client->base_path);
+
+ g_free(client);
+}
+
+gboolean g_dbus_client_set_connect_watch(GDBusClient *client,
+ GDBusWatchFunction function, void *user_data)
+{
+ if (client == NULL)
+ return FALSE;
+
+ client->connect_func = function;
+ client->connect_data = user_data;
+
+ return TRUE;
+}
+
+gboolean g_dbus_client_set_disconnect_watch(GDBusClient *client,
+ GDBusWatchFunction function, void *user_data)
+{
+ if (client == NULL)
+ return FALSE;
+
+ client->disconn_func = function;
+ client->disconn_data = user_data;
+
+ return TRUE;
+}
+
+gboolean g_dbus_client_set_signal_watch(GDBusClient *client,
+ GDBusMessageFunction function, void *user_data)
+{
+ if (client == NULL)
+ return FALSE;
+
+ client->signal_func = function;
+ client->signal_data = user_data;
+
+ return TRUE;
+}
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