power.py 文件源码

def _send_magic_packets(task, dest_host, dest_port):
    """Create and send magic packets.

    Creates and sends a magic packet for each MAC address registered in
    the Node.

    :param task: a TaskManager instance containing the node to act on.
    :param dest_host: The broadcast to this IP address.
    :param dest_port: The destination port.
    :raises: WOLOperationError if an error occur when connecting to the
        host or sending the magic packets

    """
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
    with contextlib.closing(s) as sock:
        for port in task.ports:
            address = port.address.replace(':', '')

            # TODO(lucasagomes): Implement sending the magic packets with
            # SecureON password feature. If your NIC is capable of, you can
            # set the password of your SecureON using the ethtool utility.
            data = 'FFFFFFFFFFFF' + (address * 16)
            packet = bytearray.fromhex(data)

            try:
                sock.sendto(packet, (dest_host, dest_port))
            except socket.error as e:
                msg = (_("Failed to send Wake-On-Lan magic packets to "
                         "node %(node)s port %(port)s. Error: %(error)s") %
                       {'node': task.node.uuid, 'port': port.address,
                        'error': e})
                LOG.exception(msg)
                raise exception.WOLOperationError(msg)

            # let's not flood the network with broadcast packets
            time.sleep(0.5)