private void DGVUpdate(IPDisplayPacket packet)
{
// Remove rows if there are too many
if (DGV.Items.Count > _maxBuffer)
{
var firstItem = _displayPackets.Dequeue();
DGV.RemoveObject(firstItem);
}
_displayPackets.Enqueue(packet);
DGV.AddObject(packet);
}
/// <summary>
/// This function parses the incoming packets and extracts the data based upon
/// the protocol being carried by the IP datagram.
/// </summary>
/// <param name="byteData">Incoming bytes</param>
/// <param name="nReceived">The number of bytes received</param>
private IPDisplayPacket GetDisplayPacket(IpV4Header ipHeader)
{
IPDisplayPacket retVal;
// Since all protocol packets are encapsulated in the IP datagram
// so we start by parsing the IP header and see what protocol data
// is being carried by it.
// Now according to the protocol being carried by the IP datagram we parse
// the data field of the datagram.
switch (ipHeader.ProtocolType)
{
case Protocol.TCP:
{
TcpHeader tcpHeader = new TcpHeader(ipHeader.Data, ipHeader.MessageLength);
retVal = new TCPDisplayPacket(ipHeader, tcpHeader);
}
break;
case Protocol.UDP:
{
UdpHeader udpHeader = new UdpHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new UDPDisplayPacket(ipHeader, udpHeader);
}
break;
case Protocol.ICMP:
{
IcmpHeader icmpHeader = new IcmpHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new IcmpDisplayPacket(ipHeader, icmpHeader);
}
break;
case Protocol.IGMP:
{
IgmpHeader igmpHeader = new IgmpHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new IgmpDisplayPacket(ipHeader, igmpHeader);
}
break;
case Protocol.DCCP:
{
DCCPHeader icmpHeader = new DCCPHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new DCCPDisplayPacket(ipHeader, icmpHeader);
}
break;
case Protocol.EIGRP:
{
EIGRPHeader icmpHeader = new EIGRPHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new EIGRPDisplayPacket(ipHeader, icmpHeader);
}
break;
case Protocol.GREs:
{
GREHeader icmpHeader = new GREHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new GREDisplayPacket(ipHeader, icmpHeader);
}
break;
case Protocol.OSPF:
{
OSPFHeader icmpHeader = new OSPFHeader(ipHeader.Data, (int)ipHeader.MessageLength);
retVal = new OSPFDisplayPacket(ipHeader, icmpHeader);
}
break;
default:
case Protocol.Unknown:
retVal = new IPDisplayPacket(ipHeader);
break;
}
return(retVal);
}