Adds a adapter NIO binding.

        :param adapter_number: adapter number
        :param port_number: port number
        :param nio: NIO instance to add to the adapter/port

def adapter_add_nio_binding(self, adapter_number, port_number, nio):
        """
        Adds a adapter NIO binding.

        :param adapter_number: adapter number
        :param port_number: port number
        :param nio: NIO instance to add to the adapter/port
        """

        try:
            adapter = self._adapters[adapter_number]
        except IndexError:
            raise IOUError('Adapter {adapter_number} does not exist for IOU "{name}"'.format(name=self._name,
                                                                                             adapter_number=adapter_number))

        if not adapter.port_exists(port_number):
            raise IOUError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
                                                                                           port_number=port_number))

        adapter.add_nio(port_number, nio)
        log.info('IOU "{name}" [{id}]: {nio} added to {adapter_number}/{port_number}'.format(name=self._name,
                                                                                             id=self._id,
                                                                                             nio=nio,
                                                                                             adapter_number=adapter_number,
                                                                                             port_number=port_number))

        if self.ubridge:
            bridge_name = "IOL-BRIDGE-{}".format(self.application_id + 512)
            yield from self._ubridge_send("iol_bridge add_nio_udp {name} {iol_id} {bay} {unit} {lport} {rhost} {rport}".format(name=bridge_name,
                                                                                                                               iol_id=self.application_id,
                                                                                                                               bay=adapter_number,
                                                                                                                               unit=port_number,
                                                                                                                               lport=nio.lport,
                                                                                                                               rhost=nio.rhost,
                                                                                                                               rport=nio.rport))
            yield from self._ubridge_apply_filters(adapter_number, port_number, nio.filters)