+------------------------------------------+
|                    Header                |
+----------+------------+---------+--------+
| Protocol | Encryption | Account | Sizeof |
|  Version |   Cipher   |   ID    |  Body  |
|  (int)   |   (int)    |  (int)  | (int)  |
+----------+------------+---------+--------+

struct ddtHeader
{
    enum ProtocolVersion;
    enum EncryptionCipher;
    int  AccountID;
    int  SizeOfBody;
};
