private TreeNode MakeIPTreeNode(IPHeader ipHeader)
{
TreeNode ipNode = new TreeNode();
ipNode.Text = "IP";
ipNode.Nodes.Add("Ver: " + ipHeader.Version);
ipNode.Nodes.Add("Header Length: " + ipHeader.HeaderLength);
ipNode.Nodes.Add("Differntiated Services: " + ipHeader.DifferentiatedServices);
ipNode.Nodes.Add("Total Length: " + ipHeader.TotalLength);
ipNode.Nodes.Add("Identification: " + ipHeader.Identification);
ipNode.Nodes.Add("Flags: " + ipHeader.Flags);
ipNode.Nodes.Add("Fragmentation Offset: " + ipHeader.FragmentationOffset);
ipNode.Nodes.Add("Time to live: " + ipHeader.TTL);
switch (ipHeader.ProtocolType)
{
case Protocol.TCP:
ipNode.Nodes.Add("Protocol: " + "TCP");
break;
case Protocol.UDP:
ipNode.Nodes.Add("Protocol: " + "UDP");
break;
case Protocol.Unknown:
ipNode.Nodes.Add("Protocol: " + "Unknown");
break;
}
ipNode.Nodes.Add("Checksum: " + ipHeader.Checksum);
ipNode.Nodes.Add("Source: " + ipHeader.SourceAddress.ToString());
ipNode.Nodes.Add("Destination: " + ipHeader.DestinationAddress.ToString());
return(ipNode);
}
private string Parse(byte[] buf, int len)
{
IPHeader ipHeader = new IPHeader(buf, len);
return(string.Format("\n\n+---------------------------------------------+\n" +
"|From: {0}\tTo: {1}\n" +
"|Protocol: {3}\tLength: {2}\n" +
"+---------------------------------------------+\n",
ipHeader.SourceAddress,
ipHeader.DestinationAddress,
ipHeader.TotalLength,
ipHeader.ProtocolType.ToString()));
}
private void ParseData(byte[] byteData, int nReceived)
{
TreeNode rootNode = new TreeNode();
IPHeader ipHeader = new IPHeader(byteData, nReceived);
TreeNode ipNode = MakeIPTreeNode(ipHeader);
rootNode.Nodes.Add(ipNode);
switch (ipHeader.ProtocolType)
{
case Protocol.TCP:
if (Filter.tcp != true)
{
return;
}
TCPHeader tcpHeader = new TCPHeader(ipHeader.Data, ipHeader.MessageLength);
TreeNode tcpNode = MakeTCPTreeNode(tcpHeader);
rootNode.Nodes.Add(tcpNode);
if (tcpHeader.DestinationPort == "53" || tcpHeader.SourcePort == "53")
{
TreeNode dnsNode = MakeDNSTreeNode(tcpHeader.Data, (int)tcpHeader.MessageLength);
rootNode.Nodes.Add(dnsNode);
}
HeaderCounter.tcp++;
break;
case Protocol.UDP:
if (Filter.udp != true)
{
return;
}
UDPHeader udpHeader = new UDPHeader(ipHeader.Data, (int)ipHeader.MessageLength);
TreeNode udpNode = MakeUDPTreeNode(udpHeader);
rootNode.Nodes.Add(udpNode);
if (udpHeader.DestinationPort == "53" || udpHeader.SourcePort == "53")
{
if (Filter.dns != true)
{
return;
}
TreeNode dnsNode = MakeDNSTreeNode(udpHeader.Data,
Convert.ToInt32(udpHeader.Length) - 8);
rootNode.Nodes.Add(dnsNode);
HeaderCounter.dns++;
}
HeaderCounter.udp++;
break;
case Protocol.Unknown:
if (Filter.unknown != true)
{
return;
}
HeaderCounter.unknown++;
break;
}
displayCounter();
AddTreeNode addTreeNode = new AddTreeNode(OnAddTreeNode);
rootNode.Text = ipHeader.SourceAddress.ToString() + "-" +
ipHeader.DestinationAddress.ToString();
treeView.Invoke(addTreeNode, new object[] { rootNode });
}
private string Parse(byte[] buf, int len)
{
IPHeader ipHeader = new IPHeader(buf,len);
return string.Format("\n\n+---------------------------------------------+\n" +
"|From: {0}\tTo: {1}\n" +
"|Protocol: {3}\tLength: {2}\n" +
"+---------------------------------------------+\n",
ipHeader.SourceAddress,
ipHeader.DestinationAddress,
ipHeader.TotalLength,
ipHeader.ProtocolType.ToString());
}