/// <summary>
/// Parses the handshake from the received data
/// </summary>
private int ParseHandshake()
{
int offset = 0;
ushort length = BitConverter.ToUInt16(DataBuffer, 0);
offset = (HandshakeHeaderLength + length);
byte[] handshakeData = new ArraySegment <byte>(DataBuffer, HandshakeHeaderLength, length).ToArray();
PacketReader reader = new PacketReader(ref handshakeData, IncomingPacketType.NoHeader);
ushort version = reader.ReadUInt16();
ushort subversion = Convert.ToUInt16(reader.ReadMapleString());
uint localVector = reader.ReadUInt32();
uint remoteVector = reader.ReadUInt32();
byte locale = reader.ReadInt8();
byte isLoginContext = 255;
if (reader.AbsoluteLength >= 15) //Decode CRC 'n shit
{
isLoginContext = reader.ReadInt8();
}
LocalCipher.Initialize(localVector, version);
RemoteCipher.Initialize(remoteVector, version);
HandshakeReceived?.Invoke(version, subversion, locale, isLoginContext);
Handshaken = true;
return(offset);
}
/// <summary>
/// Extracts packets from the DataBuffer
/// </summary>
private void ProcessRawData(int received)
{
int total = received + BufferOffset;
int offset = 0;
if (!Handshaken)
{
offset += ParseHandshake();
}
while (total - offset > RegularHeaderLength)
{
int length = GetPacketLength(DataBuffer, offset);
if ((total - offset) < length)
{
byte[] leftover = new ArraySegment <byte>(DataBuffer, offset, (total - offset)).ToArray();
Buffer.BlockCopy(leftover, 0, DataBuffer, 0, leftover.Length);
BufferOffset = leftover.Length;
return;
}
offset += RegularHeaderLength;
byte[] packetData = new ArraySegment <byte>(DataBuffer, offset, length).ToArray();
RemoteCipher.Decrypt(ref packetData);
offset += length;
PacketReceived?.Invoke(new PacketReader(ref packetData, IncomingPacketType.DynamicHeader));
}
}