private void Connection_OnPacketReceived(SharpPcap.PosixTimeval timeval, TcpConnection connection, TcpFlow flow, TcpPacket tcpPacket)
{
if (tcpPacket.PayloadData.Length == 0)
{
return;
}
var data = (byte[])tcpPacket.PayloadData.Clone();
var direction = tcpPacket.SourcePort == Constants.GAME_PORT ? PacketDirection.ServerToClient : PacketDirection.ClientToServer;
if (gameCrypt != null)
{
gameCrypt.Decrypt(data, direction);
}
var parsedPacket = ParsePacket(data, direction);
if (parsedPacket == null)
{
return;
}
if (parsedPacket.GetType() == typeof(KeyPacket))
{
gameCrypt = new GameCrypt(parsedPacket as KeyPacket);
return;
}
}
void HandleFlowOnPacketReceived(SharpPcap.PosixTimeval timeval,
TcpPacket tcp,
TcpConnection connection,
TcpFlow flow)
{
AddPacket(tcp);
}
private void Connection_OnPacketReceived(SharpPcap.PosixTimeval timeval, TcpConnection connection, TcpFlow flow, TcpPacket tcp)
{
//incoming packets, first one is Init always
if (tcp.SourcePort == Constants.LOGIN_PORT && Crypt.IsInitial)
{
TryInit(tcp);
return;
}
// only after inited we can parse
if (!Crypt.IsInitial)
{
ParsePacket(tcp);
}
}
private void Connection_OnConnectionClosed(SharpPcap.PosixTimeval timeval, TcpConnection connection, TcpPacket tcp, TcpConnection.CloseType closeType)
{
TcpConnection.OnPacketReceived -= Connection_OnPacketReceived;
TcpConnection.OnConnectionClosed -= Connection_OnConnectionClosed;
ClientHandler.RemoveGameClient(this);
}
/// <summary>
/// Statistics would be a great way of detecting DoS attacks - more efficient than looking at individual packet detection
/// </summary>
/// <param name="statsPacket"></param>
/// <param name="lasTimeval"></param>
/// <param name="sensorId"></param>
public void ReportStatistics(SharpPcap.WinPcap.StatisticsModePacket statsPacket, SharpPcap.PosixTimeval lasTimeval, string sensorId)
{
throw new NotImplementedException();
}
