private static int CalculateBandwidth(TcpFlow flow, TimeSpan interval)
{
int bandwidth = 0;
if (!TcpPackets.ContainsKey(flow))
{
return(bandwidth);
}
var now = DateTime.UtcNow;
var entryArray = TcpPackets[flow];
bandwidth = (from entry in entryArray
where ((now - entry.Timeval.Date) < interval)
select entry.Packet.Bytes.Length).Sum();
return(bandwidth);
}
/// <summary>
///
/// </summary>
/// <param name="timeval">
/// A <see cref="PosixTimeval"/>
/// </param>
/// <param name="connection">
/// A <see cref="TcpConnection"/>
/// </param>
/// <param name="flow">
/// A <see cref="TcpFlow"/>
/// </param>
/// <param name="tcp">
/// A <see cref="TcpPacket"/>
/// </param>
protected void HandleCOnPacketReceived(PosixTimeval timeval, TcpConnection connection, TcpFlow flow, TcpPacket tcp)
{
// look up the ConnectionStatistics
var connectionStatistics = connectionDictionary[connection];
if (tcp.Synchronize && !tcp.Acknowledgment)
{
if (connectionStatistics.clientFlow != null)
{
OnMeasurementEvent(this, connection, EventTypes.DuplicateSynFound);
return;
}
connectionStatistics.clientFlow = flow;
connectionStatistics.synTime = timeval;
}
else if (tcp.Synchronize && tcp.Acknowledgment)
{
if (connectionStatistics.serverFlow != null)
{
OnMeasurementEvent(this, connection, EventTypes.DuplicateSynAckFound);
return;
}
connectionStatistics.serverFlow = flow;
connectionStatistics.synAckTime = timeval;
}
// if we have both a syn and a syn-ack time then report that
// we have a valid measurement
if ((connectionStatistics.synTime != null) &&
(connectionStatistics.synAckTime != null))
{
OnMeasurementFound(this, connection, connectionStatistics);
// unregister the handler since we found our syn-syn/ack time
connection.OnPacketReceived -= HandleCOnPacketReceived;
}
}
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;
}
}
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);
}
}
static void HandleOnPacketReceived(PosixTimeval timeval, PacketDotNet.TcpPacket tcp, TcpConnection connection, TcpFlow flow)
{
lock (DictionaryLock)
{
if (!TcpPackets.ContainsKey(flow))
{
TcpPackets[flow] = new List <Entry>();
}
var entry = new Entry(timeval, tcp);
TcpPackets[flow].Add(entry);
}
}
static void HandleOnFlowClosed(PosixTimeval timeval, PacketDotNet.TcpPacket tcp, TcpConnection connection, TcpFlow flow)
{
// unhook the received handler
flow.OnPacketReceived -= HandleOnPacketReceived;
}