private static void ServerPacketsProcessor(AuthenticationServer ui)
{
//TODO: make it work for multiple servers, we need a list holding fragments for different servers and logic to manage it.
Fragmentation fragment = new Fragmentation(8192);
while (_continueServerProcessing)
{
PacketContainer cont;
if (_queuedServerPackets.TryDequeue(out cont))
{
PacketsProcessor dataProcessor = new PacketsProcessor();
dataProcessor.ExtractPackets(cont, ref fragment);
foreach (PacketContent p in cont.extractedPackets)
{
GameServer.Received(ui, p, GetServerByIndex(cont.serverID));
}
}
else
{
Thread.Sleep(5);
}
}
}
public void ExtractPackets(PacketContainer cont, ref Fragmentation f)
{
bool stillReading = true;
int packetLen;
//Extreme case
const int PACKET_SIZE_HEADER = 4; // 4 bytes
if (f.pendingFragment)
{
if (f.sizeSplitted)
{
f.sizeSplitted = false;
Buffer.BlockCopy(cont.buffer, 0, f.sizeBuffer, f.sizeAlreadyFilledBytes, f.sizeMissingBytes);
readOffset += f.sizeMissingBytes;
f.missingBytes = BitConverter.ToInt32(f.sizeBuffer, 0);
f.sizeAlreadyFilledBytes = 0;
f.sizeMissingBytes = 0;
}
if (f.missingBytes + readOffset <= cont.size)
{
Buffer.BlockCopy(cont.buffer, readOffset, f.buffer, f.alreadyFilledBytes, f.missingBytes);
readOffset += f.missingBytes;
cont.extractedPackets.Add(new PacketContent(ref f.buffer, 0, f.alreadyFilledBytes + f.missingBytes));
f.pendingFragment = false;
f.alreadyFilledBytes = 0;
f.missingBytes = 0;
}
else
{
f.missingBytes -= cont.size;
f.alreadyFilledBytes += cont.size;
Buffer.BlockCopy(cont.buffer, readOffset, f.buffer, f.alreadyFilledBytes, cont.size);
readOffset += cont.size;
}
}
while (stillReading && readOffset < cont.size)
{
//size of single packet
if (cont.size < 8192)
{
if (1 == 1)
{
}
}
packetLen = BitConverter.ToInt32(cont.buffer, readOffset);
readOffset += 4;
if (packetLen + readOffset > cont.size) // fill Fragmentation
{
f.pendingFragment = true;
f.alreadyFilledBytes = cont.size - readOffset;
f.missingBytes = packetLen - f.alreadyFilledBytes;
if (f.alreadyFilledBytes == 0) break;
Buffer.BlockCopy(cont.buffer, readOffset, f.buffer, 0, f.alreadyFilledBytes);
readOffset += f.alreadyFilledBytes;
break;
}
else // just read it
{
cont.extractedPackets.Add(new PacketContent(ref cont.buffer, readOffset, packetLen));
readOffset += packetLen;
}
if ((cont.size - readOffset) <= 0)
{
stillReading = false;
break;
}
//Extreme case - packet header splitted between packets
if ((cont.size - readOffset) < PACKET_SIZE_HEADER)
{
f.pendingFragment = true;
f.sizeSplitted = true;
f.sizeAlreadyFilledBytes = cont.size - readOffset;
f.sizeMissingBytes = PACKET_SIZE_HEADER - f.sizeAlreadyFilledBytes;
Buffer.BlockCopy(cont.buffer, readOffset, f.sizeBuffer, 0, f.sizeAlreadyFilledBytes);
stillReading = false;
}
}
}