internal override void EnterEvent()
        {
            client.StartNewTransaction();

            DhcpFormat dhcp =
                new DhcpFormat(DhcpFormat.MessageType.Discover);

            dhcp.TransactionID = client.TransactionID;
            dhcp.SetHardwareAddress(client.MacAddress);

#if ADVERTISE_CLIENT_ID
            // Add Client Identifier for self
            //
            // This is disabled because the Windows
            // DHCP server allocates us a different address with the
            // client id present if we networked booted.  Thus having the
            // identifier breaks static DHCP entries which we use
            // for test machines.
            EthernetAddress macAddress = client.MacAddress;
            dhcp.AddOption(DhcpClientID.Create(macAddress.GetAddressBytes()));
#endif

            // Add parameters we'd like to know about
            dhcp.AddOption(DhcpParameterRequest.Create(
                               DhcpClient.StandardRequestParameters
                               )
                           );
            // dhcp.AddOption(DhcpAutoConfigure.Create(0));
            client.Send(EthernetAddress.Broadcast, dhcp);
            client.ChangeState(new DhcpClientStateSelecting(client));
        }
        internal override void EnterEvent()
        {
            client.SetStateTimeout(DateTime.Now + StateTimeout);

            DhcpFormat dhcp =
                new DhcpFormat(DhcpFormat.MessageType.Request);

            dhcp.TransactionID      = client.TransactionID;
            dhcp.TransactionSeconds = client.TransactionSeconds;
            dhcp.SetHardwareAddress(client.MacAddress);
#if ADVERTISE_CLIENT_ID
            dhcp.AddOption(
                DhcpClientID.Create(client.MacAddress.GetAddressBytes())
                );
#endif
            dhcp.AddOption(
                DhcpRequestedIPAddress.Create(offeredAddress)
                );

            // Add parameters we'd like to know about
            dhcp.AddOption(DhcpParameterRequest.Create(
                               DhcpClient.StandardRequestParameters
                               )
                           );

            client.Send(EthernetAddress.Broadcast, dhcp);
        }