private void SendRstPacket(EthernetPacket ethernetPacket, IPPacket ipPacket, TcpPacket tcpPacket)
{
var sourceHwAddress = PhysicalAddress.Parse(ethernetPacket.SourceHwAddress.ToString());
var sourceAddress = IPAddress.Parse(ipPacket.SourceAddress.ToString());
var acknowledgementNumber = tcpPacket.AcknowledgmentNumber;
var sourcePort = tcpPacket.SourcePort;
ethernetPacket.SourceHwAddress = ethernetPacket.DestinationHwAddress;
ethernetPacket.DestinationHwAddress = sourceHwAddress;
ipPacket.SourceAddress = ipPacket.DestinationAddress;
ipPacket.DestinationAddress = sourceAddress;
tcpPacket.Syn = false;
tcpPacket.Ack = false;
tcpPacket.Rst = true;
tcpPacket.AcknowledgmentNumber = tcpPacket.SequenceNumber;
tcpPacket.SequenceNumber = acknowledgementNumber;
tcpPacket.SourcePort = tcpPacket.DestinationPort;
tcpPacket.DestinationPort = sourcePort;
tcpPacket.Checksum = tcpPacket.CalculateTCPChecksum();
ethernetPacket.UpdateCalculatedValues();
ipPacket.UpdateCalculatedValues();
tcpPacket.UpdateCalculatedValues();
ipPacket.PayloadPacket = tcpPacket;
ethernetPacket.PayloadPacket = ipPacket;
this.captureDevice.SendPacket(ethernetPacket);
}
