adv_monitor: Implement UnregisterMonitor()

This implements the UnregisterMonitor() method handler of ADV monitor
manager interface.

The following tests were performed.
- Issue a UnregisterMonitor() call with a nonexistent path and expect
org.bluez.Error.DoesNotExist as the return.
- Issue a UnregisterMonitor() call with a invalid path and expect
org.bluez.Error.InvalidArguments as the return.
- Issue RegisterMonitor() with a path, issue UnregisterMonitor() and
expect a successful method call return.

1 files changed, 36 insertions, 1 deletions

diff --git a/src/adv_monitor.c b/src/adv_monitor.c
index b9bffe9ba..d9c5c7262 100644
--- a/src/adv_monitor.c
+++ b/src/adv_monitor.c
@@ -212,13 +212,48 @@ static DBusMessage *register_monitor(DBusConnection *conn, DBusMessage *msg,
 	return dbus_message_new_method_return(msg);
 }
 
+/* Handles UnregisterMonitor D-Bus call */
+static DBusMessage *unregister_monitor(DBusConnection *conn,
+					DBusMessage *msg, void *user_data)
+{
+	DBusMessageIter args;
+	struct app_match_data match;
+	struct adv_monitor_app *app;
+	struct btd_adv_monitor_manager *manager = user_data;
+
+	if (!dbus_message_iter_init(msg, &args))
+		return btd_error_invalid_args(msg);
+
+	if (dbus_message_iter_get_arg_type(&args) != DBUS_TYPE_OBJECT_PATH)
+		return btd_error_invalid_args(msg);
+
+	dbus_message_iter_get_basic(&args, &match.path);
+
+	if (!strlen(match.path) || !g_str_has_prefix(match.path, "/"))
+		return btd_error_invalid_args(msg);
+
+	match.owner = dbus_message_get_sender(msg);
+
+	app = queue_find(manager->apps, app_match, &match);
+	if (!app)
+		return btd_error_does_not_exist(msg);
+
+	queue_remove(manager->apps, app);
+	app_destroy(app);
+
+	btd_info(manager->adapter_id, "Path %s removed along with Adv Monitor "
+			"app %s", match.path, match.owner);
+
+	return dbus_message_new_method_return(msg);
+}
+
 static const GDBusMethodTable adv_monitor_methods[] = {
 	{ GDBUS_EXPERIMENTAL_METHOD("RegisterMonitor",
 					GDBUS_ARGS({ "application", "o" }),
 					NULL, register_monitor) },
 	{ GDBUS_EXPERIMENTAL_ASYNC_METHOD("UnregisterMonitor",
 					GDBUS_ARGS({ "application", "o" }),
-					NULL, NULL) },
+					NULL, unregister_monitor) },
 	{ }
 };