public static bool Parser(ref TreeNodeCollection mNode,
byte [] PacketData,
ref int Index,
ref ListViewItem LItem,
ref ushort LastTftpPort)
{
TreeNode mNodex;
string Tmp = "";
PACKET_UDP PUdp;
mNodex = new TreeNode();
mNodex.Text = "UDP ( Unary Datagram Protocol )";
Function.SetPosition(ref mNodex, Index, Const.LENGTH_OF_UDP, true);
if ((Index + Const.LENGTH_OF_UDP) > PacketData.Length)
{
mNode.Add(mNodex);
Tmp = "[ Malformed UDP packet. Remaining bytes don't fit an UDP packet. Possibly due to bad decoding ]";
mNode.Add(Tmp);
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = Tmp;
return(false);
}
try
{
PUdp.SourcePort = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Source Port : " + Function.ReFormatString(PUdp.SourcePort, Const.GetPortStr(PUdp.SourcePort));
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 2, 2, false);
PUdp.DestinationPort = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Destination Port : " + Function.ReFormatString(PUdp.DestinationPort, Const.GetPortStr(PUdp.DestinationPort));
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 2, 2, false);
PUdp.Length = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Length : " + Function.ReFormatString(PUdp.Length, null);
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 2, 2, false);
PUdp.Checksum = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
Tmp = "Checksum : " + Function.ReFormatString(PUdp.Checksum, null);
mNodex.Nodes.Add(Tmp);
Function.SetPosition(ref mNodex, Index - 2, 2, false);
LItem.SubItems[Const.LIST_VIEW_PROTOCOL_INDEX].Text = "UDP";
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "Source Port = " + PUdp.SourcePort.ToString() + " ( " + Const.GetPortStr(PUdp.SourcePort) + " ) , Destination Port = " + PUdp.DestinationPort.ToString() + " ( " + Const.GetPortStr(PUdp.DestinationPort) + " )";
mNode.Add(mNodex);
if ((PUdp.SourcePort == Const.IPPORT_SSDP) ||
(PUdp.DestinationPort == Const.IPPORT_SSDP) ||
(PUdp.SourcePort == Const.IPPORT_SSDP2) ||
(PUdp.DestinationPort == Const.IPPORT_SSDP2))
{
PacketHTTP.Parser(ref mNode, PacketData, ref Index, ref LItem, true);
}
else if ((PUdp.SourcePort == Const.IPPORT_DOMAIN) ||
(PUdp.DestinationPort == Const.IPPORT_DOMAIN))
{
//PacketDNS.Parser( ref mNode , PacketData , ref Index , ref LItem );
}
else if ((PUdp.SourcePort == Const.IPPORT_NBNS) || (PUdp.DestinationPort == Const.IPPORT_NBNS))
{
PacketNBNS.Parser(ref mNode, PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == Const.IPPORT_NBDTGRM) || (PUdp.DestinationPort == Const.IPPORT_NBDTGRM))
{
PacketNBDS.Parser(ref mNode, PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == Const.IPPORT_TFTP) || (PUdp.DestinationPort == Const.IPPORT_TFTP))
{
if (PUdp.SourcePort == Const.IPPORT_TFTP)
{
LastTftpPort = PUdp.DestinationPort;
}
else if (PUdp.DestinationPort == Const.IPPORT_TFTP)
{
LastTftpPort = PUdp.SourcePort;
}
PacketTFTP.Parser(ref mNode, PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == LastTftpPort) || (PUdp.DestinationPort == LastTftpPort))
{
PacketTFTP.Parser(ref mNode, PacketData, ref Index, ref LItem);
}
}
catch (Exception Ex)
{
mNode.Add(mNodex);
Tmp = "[ Malformed UDP packet. Remaining bytes don't fit an UDP packet. Possibly due to bad decoding ]";
mNode.Add(Tmp);
Tmp = "[ Exception raised is <" + Ex.GetType().ToString() + "> at packet index <" + Index.ToString() + "> ]";
mNode.Add(Tmp);
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "[ Malformed UDP packet. Remaining bytes don't fit an UDP packet. Possibly due to bad decoding ]";
return(false);
}
return(true);
}
public static bool Parser(byte [] PacketData,
ref int Index,
ref ListViewItem LItem,
ref ushort LastTftpPort)
{
string Tmp = "";
PACKET_UDP PUdp;
if ((Index + Const.LENGTH_OF_UDP) > PacketData.Length)
{
Tmp = "[ Malformed UDP packet. Remaining bytes don't fit an UDP packet. Possibly due to bad decoding ]";
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = Tmp;
return(false);
}
try
{
PUdp.SourcePort = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
PUdp.DestinationPort = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
PUdp.Length = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
PUdp.Checksum = Function.Get2Bytes(PacketData, ref Index, Const.NORMAL);
LItem.SubItems[Const.LIST_VIEW_PROTOCOL_INDEX].Text = "UDP";
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "Source Port = " + PUdp.SourcePort.ToString() + " ( " + Const.GetPortStr(PUdp.SourcePort) + " ) , Destination Port = " + PUdp.DestinationPort.ToString() + " ( " + Const.GetPortStr(PUdp.DestinationPort) + " )";
if ((PUdp.SourcePort == Const.IPPORT_SSDP) ||
(PUdp.DestinationPort == Const.IPPORT_SSDP) ||
(PUdp.SourcePort == Const.IPPORT_SSDP2) ||
(PUdp.DestinationPort == Const.IPPORT_SSDP2))
{
PacketHTTP.Parser(PacketData, ref Index, ref LItem, true);
}
else if ((PUdp.SourcePort == Const.IPPORT_DOMAIN) ||
(PUdp.DestinationPort == Const.IPPORT_DOMAIN))
{
//PacketDNS.Parser( PacketData , ref Index , ref LItem );
}
else if ((PUdp.SourcePort == Const.IPPORT_NBNS) || (PUdp.DestinationPort == Const.IPPORT_NBNS))
{
PacketNBNS.Parser(PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == Const.IPPORT_NBDTGRM) || (PUdp.DestinationPort == Const.IPPORT_NBDTGRM))
{
PacketNBDS.Parser(PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == Const.IPPORT_TFTP) || (PUdp.DestinationPort == Const.IPPORT_TFTP))
{
if (PUdp.SourcePort == Const.IPPORT_TFTP)
{
LastTftpPort = PUdp.DestinationPort;
}
else if (PUdp.DestinationPort == Const.IPPORT_TFTP)
{
LastTftpPort = PUdp.SourcePort;
}
PacketTFTP.Parser(PacketData, ref Index, ref LItem);
}
else if ((PUdp.SourcePort == LastTftpPort) || (PUdp.DestinationPort == LastTftpPort))
{
PacketTFTP.Parser(PacketData, ref Index, ref LItem);
}
}
catch
{
LItem.SubItems[Const.LIST_VIEW_INFO_INDEX].Text = "[ Malformed UDP packet. Remaining bytes don't fit an UDP packet. Possibly due to bad decoding ]";
return(false);
}
return(true);
}
