public static PacketResult Process(BinaryReader reader, Blowfish blowfish, out SubPacket subPacket)
{
subPacket = null;
Header header = Header.UnMarshal(reader);
// not enough data to cover length specified in header
if (reader.BaseStream.Length - reader.BaseStream.Position < header.Size - Header.Length)
{
return(PacketResult.Malformed);
}
byte[] payload = reader.ReadBytes((int)(header.Size - Header.Length));
if (header.Type != SubPacketType.KeepAliveRequest && header.Type != SubPacketType.KeepAliveResponse)
{
blowfish?.Decipher(payload, 0, payload.Length);
}
using (var stream = new MemoryStream(payload))
{
using (var subReader = new BinaryReader(stream))
{
MessageHeader messageHeader = new MessageHeader();
if (header.Type == SubPacketType.Message)
{
messageHeader = MessageHeader.UnMarshal(subReader);
Array.Copy(payload, MessageHeader.Length, payload, 0, payload.Length - MessageHeader.Length);
Array.Resize(ref payload, payload.Length - (int)MessageHeader.Length);
stream.Position = 0L;
}
subPacket = PacketManager.GetSubPacket(header.Type, (SubPacketClientOpcode)messageHeader.Opcode, SubPacketServerOpcode.None) ?? new SubPacket();
subPacket.Initialise(header, messageHeader);
subPacket.Read(subReader);
}
}
return(PacketResult.Ok);
}
