public static function updateSocketSession($client_id, $session_str)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_UPDATE_SESSION;
$gateway_data['client_id'] = $client_id;
$gateway_data['ext_data'] = $session_str;
return self::sendToGateway(Context::$local_ip . ':' . Context::$local_port, $gateway_data);
}