public TcpPacket HandleTcpPacket()
{
TcpPacket packet = new TcpPacket();
int source_port = HeaderParser.ToInt(this.Data, 0, 16);
int dest_port = HeaderParser.ToInt(this.Data, 16, 16);
int offset = HeaderParser.ToInt(this.Data, 96, 4) * 4;
packet.Source = new IPEndPoint(this.Source, source_port);
packet.Destination = new IPEndPoint(this.Destination, dest_port);
packet.Sequence = HeaderParser.ToUInt(this.Data, 32, 32);
packet.Acknowledgement = HeaderParser.ToUInt(this.Data, 64, 32);
packet.DataOffset = offset;
packet.Urgent = HeaderParser.ToByte(this.Data, 106, 1) != 0;
packet.Ack = HeaderParser.ToByte(this.Data, 107, 1) != 0;
packet.Push = HeaderParser.ToByte(this.Data, 108, 1) != 0;
packet.Reset = HeaderParser.ToByte(this.Data, 109, 1) != 0;
packet.Syn = HeaderParser.ToByte(this.Data, 110, 1) != 0;
packet.Fin = HeaderParser.ToByte(this.Data, 111, 1) != 0;
packet.WindowSize = HeaderParser.ToInt(this.Data, 112, 16);
packet.Checksum = HeaderParser.ToInt(this.Data, 128, 16);
packet.UrgentPointer = HeaderParser.ToInt(this.Data, 144, 16);
if (offset > 20)
{
packet.SetData(this.Data, 20, offset - 20);
}
packet.SetData(this.Data, offset, this.Data.Length - offset);
return(packet);
}
public bool SetFields(Byte[] buffer)
{
if (buffer.Length >= this.HeaderLength_)
{
int [] x = new int[2];
for (int i = 0; i < Keys_.Count; i++)
{
x = (int[])FieldLengths_[Keys_[i]];
if (x[1] <= 8)
{
Fields_.Add(Keys_[i], HeaderParser.ToByte(buffer, x[0], x[1]));
}
else if (x[1] <= 16)
{
Fields_.Add(Keys_[i], HeaderParser.ToInt(buffer, x[0], x[1]));
}
else if (x[1] <= 32)
{
Fields_.Add(Keys_[i], HeaderParser.ToUInt(buffer, x[0], x[1]));
}
}
this.SetData(buffer, this.HeaderLength_, buffer.Length - this.HeaderLength_);
Length_ = buffer.Length;
return(true);
}
return(false);
}
public int CheckNextFields(byte [] data)
{
int ret = 0;
switch (this.Type)
{
case 0:
case 8:
case 13:
case 14:
case 15:
case 16:
case 17:
case 18:
case 37:
case 38:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(16);
this.FieldNames_.Add("Identifier");
this.FieldValues_.Add("Identifier", HeaderParser.ToUInt(data, 32, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Sequence Number");
this.FieldValues_.Add("Sequence Number", HeaderParser.ToUInt(data, 48, 16));
ret = 8;
this.dataIsIp = false;
break;
case 4:
case 11:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(32);
this.FieldNames_.Add("Reserved");
this.FieldValues_.Add("Reserved", HeaderParser.ToUInt(data, 32, 32));
ret = 8;
this.dataIsIp = true;
break;
case 10:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(32);
this.FieldNames_.Add("Reserved");
this.FieldValues_.Add("Reserved", HeaderParser.ToUInt(data, 32, 32));
ret = 8;
this.dataIsIp = false;
break;
case 3:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(16);
this.FieldNames_.Add("Unused");
this.FieldValues_.Add("Unused", HeaderParser.ToUInt(data, 32, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Next Hop MTU");
this.FieldValues_.Add("Next Hop MTU", HeaderParser.ToUInt(data, 48, 16));
ret = 8;
this.dataIsIp = true;
break;
case 5:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(32);
this.FieldNames_.Add("IP Address");
this.FieldValues_.Add("IP Address", HeaderParser.ToUInt(data, 32, 32));
ret = 8;
this.dataIsIp = true;
break;
case 31:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(32);
this.FieldNames_.Add("Offset");
this.FieldValues_.Add("Offset", HeaderParser.ToUInt(data, 32, 32));
ret = 8;
this.dataIsIp = false;
break;
case 12:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(8);
this.FieldNames_.Add("Pointer");
this.FieldValues_.Add("Pointer", HeaderParser.ToUInt(data, 32, 8));
this.FieldLength_.Add(24);
this.FieldNames_.Add("Unused");
this.FieldValues_.Add("Unused", HeaderParser.ToUInt(data, 40, 24));
ret = 8;
this.dataIsIp = true;
break;
case 9:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(8);
this.FieldNames_.Add("Advertisement Count");
this.FieldValues_.Add("Advertisement Count", HeaderParser.ToUInt(data, 32, 8));
this.FieldLength_.Add(8);
this.FieldNames_.Add("Address Entry Size");
this.FieldValues_.Add("Address Entry Size", HeaderParser.ToUInt(data, 40, 8));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Life Time");
this.FieldValues_.Add("Life Time", HeaderParser.ToUInt(data, 48, 16));
ret = 8;
this.dataIsIp = false;
break;
case 30:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(16);
this.FieldNames_.Add("Identifier");
this.FieldValues_.Add("Identifier", HeaderParser.ToUInt(data, 32, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Unused");
this.FieldValues_.Add("Unused", HeaderParser.ToUInt(data, 48, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Out Bount Hop Count");
this.FieldValues_.Add("Out Bount Hop Count", HeaderParser.ToUInt(data, 64, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Return Hop Count");
this.FieldValues_.Add("Return Hop Count", HeaderParser.ToUInt(data, 80, 16));
this.FieldLength_.Add(32);
this.FieldNames_.Add("Output Link Speed");
this.FieldValues_.Add("Output Link Speed", HeaderParser.ToUInt(data, 96, 32));
this.FieldLength_.Add(32);
this.FieldNames_.Add("Output Link MTU");
this.FieldValues_.Add("Output Link MTU", HeaderParser.ToUInt(data, 128, 32));
ret = 20;
this.dataIsIp = false;
break;
case 40:
FieldNames_ = new ArrayList();
FieldLength_ = new ArrayList();
FieldValues_ = new Hashtable();
this.FieldLength_.Add(16);
this.FieldNames_.Add("Reserved");
this.FieldValues_.Add("Reserved", HeaderParser.ToUInt(data, 32, 16));
this.FieldLength_.Add(16);
this.FieldNames_.Add("Pointer");
this.FieldValues_.Add("Pointer", HeaderParser.ToUInt(data, 48, 16));
ret = 8;
this.dataIsIp = false;
break;
default: break;
}
return(ret);
}
