Handshake & Session Control

The very first messages after opening the TCP connection are the handshake. The server also describes these as session. That’s why this article is also titled Session Control. In order to communicate with a server or a client, we need to open a session.

The server sends the first message after the TCP connection is established. Depending on the selected security features, the client has to send a proper answer.

Initialze a session

Type	Bit
None	00000000
Disabled	00000001
Blowfish	00000010
SecurityBytes	00000100
Handshake	00001000
HandshakeResponse	00010000

Remark: The three remaining bits are unused.