public void SendHandshake(ushort pVersion, string pPatchLocation, byte pLocale)
{
_encryptIV = new byte[4];
rnd.NextBytes(_encryptIV);
_decryptIV = new byte[4];
rnd.NextBytes(_decryptIV);
Packet packet = new Packet();
packet.WriteUShort(pVersion);
packet.WriteString(pPatchLocation);
packet.WriteBytes(_decryptIV);
packet.WriteBytes(_encryptIV);
packet.WriteByte(pLocale);
SendPacket(packet);
_mapleVersion = pVersion;
_maplePatchLocation = pPatchLocation;
_mapleLocale = pLocale;
_rijndaelAES.Key = GMSKeys.GetKeyForVersion(_mapleVersion);
_rijndaelAES.Mode = CipherMode.ECB;
_rijndaelAES.Padding = PaddingMode.PKCS7;
_transformer = _rijndaelAES.CreateEncryptor();
}
/// <summary>
/// Used as IAsyncResult parser for ContinueReading().
/// </summary>
/// <param name="pIAR">The result AsyncCallback makes</param>
private void EndReading(IAsyncResult pIAR)
{
int amountReceived = 0;
try
{
amountReceived = _socket.EndReceive(pIAR);
}
catch (Exception ex)
{
Console.WriteLine(TypeName + " : " + ex.ToString());
amountReceived = 0;
}
if (amountReceived == 0)
{
// We got a disWvsBeta.Common.Sessions here!
OnDisconnectINTERNAL();
return;
}
// Add amount of bytes received to _bufferpos so we know if we got everything.
_bufferpos += amountReceived;
try
{
// Check if we got all data. There is _no_ way we would have received more bytes than needed. Period.
if (_bufferpos == _bufferlen)
{
// It seems we have all data we need
// Now check if we got a header
if (_header)
{
if (!_encryption && _receivingFromServer)
{
// Unencrypted packets have a short header with plain length.
ushort length = (ushort)(_buffer[0] | _buffer[1] << 8);
StartReading(length);
}
else
{
int length = GetHeaderLength(_buffer);
StartReading(length);
}
}
else
{
Packet packet;
if (_encryption)
{
_buffer = Decrypt(_buffer);
packet = new Packet(_buffer);
DoAction((date) =>
{
try
{
OnPacketInbound(packet);
}
catch (Exception ex)
{
Console.WriteLine("Handling Packet Error: {0}", ex.ToString());
}
});
}
else
{
_encryption = true; // First packet received or sent is unencrypted. All others are.
packet = new Packet(_buffer);
_mapleVersion = packet.ReadUShort();
_maplePatchLocation = _maplePatchLocation = packet.ReadString();
_encryptIV = packet.ReadBytes(4);
_decryptIV = packet.ReadBytes(4);
_mapleLocale = packet.ReadByte();
Console.WriteLine(TypeName + " MapleVersion: {0}; Patch Location: {1}; Locale: {2}", _mapleVersion, _maplePatchLocation, _mapleLocale);
_rijndaelAES.Key = GMSKeys.GetKeyForVersion(_mapleVersion);
_rijndaelAES.Mode = CipherMode.ECB;
_rijndaelAES.Padding = PaddingMode.PKCS7;
_transformer = _rijndaelAES.CreateEncryptor();
packet.Reset();
DoAction((date) =>
{
try
{
OnHandshakeInbound(packet);
}
catch (Exception ex)
{
Console.WriteLine("Handling Packet Error: {0}", ex.ToString());
}
});
}
StartReading(4, true);
}
}
else
{
ContinueReading();
}
}
catch (SocketException socketException)
{
Console.WriteLine(TypeName + " Socket Exception while receiving data: {0}", socketException.Message);
OnDisconnectINTERNAL();
}
catch (Exception ex)
{
Console.WriteLine(TypeName + " [ERROR] EndReading(): {0}", ex.ToString());
OnDisconnectINTERNAL();
}
}
