public void Stop()
{
var tmp = new List<ICaptureDevice>(_devices);
foreach (var device in tmp)
StopCapture(device);
tmp.Clear();
_devices.Clear();
FoundConnection = false;
if (_currentSession != null)
{
_currentSession.Dispose();
_currentSession = null;
}
}
void device_OnPacketArrival(object sender, CaptureEventArgs e)
{
var packet = Packet.ParsePacket(e.Packet.LinkLayerType, e.Packet.Data);
// Check if IP packet
IpPacket ipPacket = packet.Extract(typeof(IpPacket)) as IpPacket;
if (ipPacket == null)
return;
if (!CheckIfCorrectIP(ipPacket.SourceAddress.ToString()) && !CheckIfCorrectIP(ipPacket.DestinationAddress.ToString()))
{
return;
}
TcpPacket tcpPacket = packet.Extract(typeof(TcpPacket)) as TcpPacket;
if (tcpPacket == null)
return;
if (!FoundConnection)
{
if (tcpPacket.Syn && tcpPacket.Ack)
{
// Found new connection.
// Check version...
if (frmMain.Instance.CheckRunningEXEVersion())
{
// Correct version
FoundConnection = true;
_currentPortMap = new KeyValuePair<ushort, ushort>(tcpPacket.DestinationPort, tcpPacket.SourcePort);
_currentSession = new Session();
MasterThread.Instance.AddCallback((a) =>
{
using (MaplePacket p = new MaplePacket(0xEE00))
{
p.WriteBool(true);
p.WriteString(ipPacket.SourceAddress.ToString());
p.WriteUShort(tcpPacket.SourcePort);
p.SwitchOver();
p.Reset(0);
ServerConnection.Instance.ForwardPacket(MaplePacket.CommunicationType.ClientPacket, p);
}
});
Logger.WriteLine("[CON] New connection found on {0}!", e.Device.Description);
if (cache != 0)
{
_currentSession.SetOutboundSequence(cache);
cache = 0;
}
_currentSession.BufferTCPPacket(tcpPacket, !(_currentPortMap.Key == tcpPacket.SourcePort && _currentPortMap.Value == tcpPacket.DestinationPort));
}
else
{
Logger.WriteLine("Incorrect MapleStory version. Ignoring connection.");
}
}
else if (tcpPacket.Syn && !tcpPacket.Ack) // Heh fix
{
cache = (int)(tcpPacket.SequenceNumber + 1);
}
}
else if (FoundConnection &&
(
(_currentPortMap.Key == tcpPacket.SourcePort && _currentPortMap.Value == tcpPacket.DestinationPort)
||
(_currentPortMap.Value == tcpPacket.SourcePort && _currentPortMap.Key == tcpPacket.DestinationPort)
)
)
{
if (tcpPacket.Fin || tcpPacket.Rst)
{
FoundConnection = false;
Logger.WriteLine("[CON] Connection Lost");
MasterThread.Instance.AddCallback((a) =>
{
using (MaplePacket p = new MaplePacket(0xEE00))
{
p.WriteBool(false);
p.SwitchOver();
p.Reset(0);
ServerConnection.Instance.ForwardPacket(MaplePacket.CommunicationType.ClientPacket, p);
}
});
return;
}
bool result = _currentSession.BufferTCPPacket(tcpPacket, !(_currentPortMap.Key == tcpPacket.SourcePort && _currentPortMap.Value == tcpPacket.DestinationPort));
if (!result)
{
FoundConnection = false;
_currentSession.Dispose();
_currentSession = null;
}
}
else
{
// Logger.WriteLine("[DEBUG] {0} - {1} {2}", FoundConnection, tcpPacket.SourcePort, tcpPacket.DestinationPort);
}
}