code: def register_route(self, src, dst, gateway):
          
          self._set_aliased('router-route', ' '.join((src, dst, gateway)), multi=True)
  
          return self
docs: Adds a routing rule to the tuntap router.
  
          :param str|unicode src: Source/mask.
  
          :param str|unicode dst: Destination/mask.
  
          :param str|unicode gateway: Gateway address.