private void ProcessTCPPacket(TCPPacket pTCPPacket, ref uint pSequence, Dictionary<uint, byte[]> pBuffer, FiestaStream pStream)
{
if (pTCPPacket.SequenceNumber > pSequence)
{
byte[] data;
while ((data = pBuffer.GetOrDefault(pSequence, null)) != null)
{
pBuffer.Remove(pSequence);
pStream.Append(data);
pSequence += (uint)data.Length;
}
if (pTCPPacket.SequenceNumber > pSequence) pBuffer[(uint)pTCPPacket.SequenceNumber] = pTCPPacket.TCPData;
}
if (pTCPPacket.SequenceNumber < pSequence)
{
int difference = (int)(pSequence - pTCPPacket.SequenceNumber);
if (difference > 0)
{
byte[] data = pTCPPacket.TCPData;
if (data.Length > difference)
{
pStream.Append(data, difference, data.Length - difference);
pSequence += (uint)(data.Length - difference);
}
}
}
else if (pTCPPacket.SequenceNumber == pSequence)
{
byte[] data = pTCPPacket.TCPData;
pStream.Append(data);
pSequence += (uint)data.Length;
}
FiestaPacket packet;
try
{
while ((packet = pStream.Read(pTCPPacket.Timeval.Date)) != null)
{
mPackets.Add(packet);
Definition definition = Config.Instance.Definitions.Find(d => d.Build == 1 && d.Outbound == packet.Outbound && d.Opcode == packet.Opcode);
if (!mOpcodes.Exists(kv => kv.Item1 == packet.Outbound && kv.Item2 == packet.Opcode))
{
mOpcodes.Add(new Tuple<bool, ushort>(packet.Outbound, packet.Opcode));
}
if (definition != null && definition.Ignore) continue;
if (!FilterOut(packet))
{
mPacketList.Items.Add(packet);
}
if (mPacketList.SelectedItems.Count == 0) packet.EnsureVisible();
}
}
catch (Exception exc)
{
OutputForm output = new OutputForm("Packet Error");
output.Append(exc.ToString());
output.Show(DockPanel, new Rectangle(MainForm.Location, new Size(400, 400)));
mTerminated = true;
Text += " (Terminated)";
}
}
internal void BufferTCPPacket(TCPPacket pTCPPacket)
{
if (pTCPPacket.Fin || pTCPPacket.Rst)
{
mTerminated = true;
Text += " (Terminated)";
return;
}
if (pTCPPacket.Syn && !pTCPPacket.Ack)
{
mLocalPort = (ushort)pTCPPacket.SourcePort;
mRemotePort = (ushort)pTCPPacket.DestinationPort;
mOutboundSequence = (uint)(pTCPPacket.SequenceNumber + 1);
Text = "Port " + mLocalPort.ToString();
return;
}
if (pTCPPacket.Syn && pTCPPacket.Ack) { mInboundSequence = (uint)(pTCPPacket.SequenceNumber + 1); return; }
if (pTCPPacket.PayloadDataLength == 0) return;
if (!gotKey)
{
byte[] tcpData = pTCPPacket.TCPData;
if (BitConverter.ToUInt16(tcpData, 1) != 0x0807)
{
this.Close();
mInboundSequence += (uint)tcpData.Length; //not valid xorkey
return;
}
ushort xorKey = BitConverter.ToUInt16(tcpData, 3);
mOutboundStream = new FiestaStream(true, xorKey);
mInboundStream = new FiestaStream(false, 0);
gotKey = true;
mInboundSequence += (uint)tcpData.Length;
return;
}
if (pTCPPacket.SourcePort == mLocalPort) ProcessTCPPacket(pTCPPacket, ref mOutboundSequence, mOutboundBuffer, mOutboundStream); //process fromclient
else ProcessTCPPacket(pTCPPacket, ref mInboundSequence, mInboundBuffer, mInboundStream); //process fromserver
}