public GameConnection(Session session)
{
_session = session;
Subscribers = new List <IDisposable>();
Characters = new Dictionary <uint, Character>();
Houses = new Dictionary <uint, House>();
Payment = new AccountPayment(this);
//шифрация пакетов
CryptRsa = new CryptRSA();
DecryptCs = new DecryptCs();
EncryptSc = new EncryptSc();
EncryptSc.MNum = 0;
}
// получаем пакеты от клиента
public void OnReceive(GameConnection connection, byte[] buf, int bytes)
{
int offset;
try
{
var stream = new PacketStream();
if (connection.LastPacket != null)
{
stream.Insert(0, connection.LastPacket);
connection.LastPacket = null;
}
offset = stream.Count; // запомним начало пакета
stream.Insert(stream.Count, buf);
while (stream != null && stream.Count > 0)
{
ushort len;
try
{
len = stream.ReadUInt16();
}
catch (MarshalException)
{
//_log.Warn("Error on reading type {0}", type);
stream.Rollback();
connection.LastPacket = stream;
stream = null;
continue;
}
var packetLen = len + stream.Pos;
if (packetLen <= stream.Count)
{
stream.Rollback();
var stream2 = new PacketStream();
stream2.Replace(stream, 0, packetLen);
if (stream.Count > packetLen)
{
var stream3 = new PacketStream();
stream3.Replace(stream, packetLen, stream.Count - packetLen);
stream = stream3;
}
else
{
stream = null;
}
stream2.ReadUInt16(); //len
stream2.ReadByte(); //unk
var level = stream2.ReadByte();
uint type = 0;
byte crc = 0;
byte counter = 0;
if (level == 1)
{
crc = stream2.ReadByte(); // TODO 1.2 crc
counter = stream2.ReadByte(); // TODO 1.2 counter
}
if (level == 5)
{
//пакет от клиента, дешифруем
//------------------------------
var input = new byte[stream2.Count - 2];
Buffer.BlockCopy(stream2, 2, input, 0, stream2.Count - 2);
var output = DecryptCs.Decode(input, GameConnection.CryptRsa.XorKey, GameConnection.CryptRsa.AesKey, GameConnection.CryptRsa.Iv, m_numPck);
m_numPck++; //увеличим номер пакета от клиента
var OutBytes = new byte[output.Length + 5];
Buffer.BlockCopy(stream2, offset, OutBytes, 0, 5); // скопируем (ushort)len, 0005
Buffer.BlockCopy(output, 1, OutBytes, 5, output.Length - 1); // сформируем полный расшифрованные пакет
// заменим шифрованные данные на дешифрованные
var strm = new PacketStream();
strm.Write(OutBytes);
stream2.Replace(strm, 0, OutBytes.Length);
stream2.ReadUInt16();
//------------------------------
}
type = stream2.ReadUInt16();
_packets[level].TryGetValue(type, out var classType);
if (classType == null)
{
HandleUnknownPacket(connection, type, level, stream2);
}
else
{
var packet = (GamePacket)Activator.CreateInstance(classType);
packet.Level = level;
packet.Connection = connection;
packet.Decode(stream2);
}
}
else
{
stream.Rollback();
connection.LastPacket = stream;
stream = null;
}
}
}
catch (Exception e)
{
connection?.Shutdown();
_log.Error(e);
}
}