private void ReadCallback(IAsyncResult ar)
{
ConnectedClient player = (ConnectedClient)ar.AsyncState;
try
{
Socket handler = player.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
//Logger.Debug($"READ {bytesRead} BYTES");
if (bytesRead > 0)
{
var currentBytes = new byte[bytesRead];
Buffer.BlockCopy(player.buffer, 0, currentBytes, 0, bytesRead);
player.accumulatedBytes.AddRange(currentBytes);
if (player.accumulatedBytes.Count >= Packet.packetHeaderSize)
{
//If we're not at the start of a packet, increment our position until we are, or we run out of bytes
var accumulatedBytes = player.accumulatedBytes.ToArray();
while (!Packet.StreamIsAtPacket(accumulatedBytes) && accumulatedBytes.Length >= Packet.packetHeaderSize)
{
player.accumulatedBytes.RemoveAt(0);
accumulatedBytes = player.accumulatedBytes.ToArray();
}
while (accumulatedBytes.Length >= Packet.packetHeaderSize && Packet.PotentiallyValidPacket(accumulatedBytes))
{
Packet readPacket = null;
try
{
readPacket = Packet.FromBytes(accumulatedBytes);
PacketReceived?.Invoke(player, readPacket);
}
catch (Exception e)
{
Logger.Error(e.Message);
Logger.Error(e.StackTrace);
}
//Remove the bytes which we've already used from the accumulated List
//If the packet failed to parse, skip the header so that the rest of the packet is consumed by the above vailidity check on the next run
player.accumulatedBytes.RemoveRange(0, readPacket?.Size ?? Packet.packetHeaderSize);
accumulatedBytes = player.accumulatedBytes.ToArray();
}
}
// Not all data received. Get more.
handler.BeginReceive(player.buffer, 0, ConnectedClient.BufferSize, 0, new AsyncCallback(ReadCallback), player);
}
else
{
//Reading zero bytes is a sign of disconnect
ClientDisconnected_Internal(player);
}
}
catch (Exception e)
{
Logger.Debug(e.ToString());
ClientDisconnected_Internal(player);
}
}