public static RconPacket ParseData(byte[] data)
{
RconPacket rconPacket = new RconPacket();
rconPacket.receivedDate = DateTime.Now;
try
{
List <byte> datalist = new List <byte>(data);
datalist.RemoveRange(0, 2); //Remove BE-header form packet.
int crc = BitConverter.ToInt32(datalist.Take(4).ToArray(), 0);
datalist.RemoveRange(0, 4); //Remove crc from packet.
int correctCrc = (int)Crc32.Compute(datalist.ToArray());
datalist.RemoveAt(0); //Remove last byte of header(0xff).
rconPacket.type = (PacketType)datalist[0];
datalist.RemoveAt(0); //Remove packet type.
if (rconPacket.type == PacketType.Login_Packet) //If packet is type of login, then there should be only 1 byte (login state) left.
{
rconPacket.data = datalist.ToArray();
rconPacket.isValid = (crc == correctCrc);
}
else
{
rconPacket.sequenceNumber = datalist[0];
datalist.RemoveAt(0); //Remove sequence number.
if (datalist[0] == 0x00) //is multipacket.
{
datalist.RemoveAt(0); //Remove multipacket header.
rconPacket.isMultipacket = true;
rconPacket.multiPacketCount = datalist[0];
datalist.RemoveAt(0); //Remove multipacket count.
rconPacket.multiPacketIndex = datalist[0];
datalist.RemoveAt(0); //Remove multipacket index.
rconPacket.data = datalist.ToArray();
rconPacket.isValid = (crc == correctCrc);
}
else
{
rconPacket.isValid = (crc == correctCrc);
rconPacket.data = datalist.ToArray();
}
}
}
catch
{
rconPacket.isValid = false;
}
return(rconPacket);
}
private bool Authenticate(string password)
{
SendPacket(password, PacketType.Login_Packet);
var response = Client.Receive(ref RemoteEndpoint);
RconPacket p = Rcon.ParseData(response);
if (p.type == PacketType.Login_Packet && p.isValid && p.data[0] == 1)
{
return(true);
}
return(false);
}
private void UdpReceiveCallback(IAsyncResult ar)
{
byte[] received = null;
try
{
received = Client.EndReceive(ar, ref RemoteEndpoint);
errorCount = 0;
}
catch
{
if (errorCount > 5)
{
SetRconEnabled(false);
}
errorCount++;
return;
}
RconPacket p = ParseData(received);
if (p.isValid)
{
p.Debug();
if (p.isMultipacket)
{
Handler.PushMultiPacket(p);
}
else if (p.type == PacketType.ServerMessage_Packet)
{
Handler.PushNormalPacket(p);
SendPacket("", PacketType.ServerMessage_Packet, p.sequenceNumber);
}
else if (p.type == PacketType.Command_Packet)
{
Handler.PushNormalPacket(p);
}
}
if (RconEnabled)
{
ReceiveUdp();
}
}
public void PushNormalPacket(RconPacket packet)
{
ReadyPackets.Add(packet);
}
public void PushMultiPacket(RconPacket packet)
{
multiPackets.Add(packet);
}