Telnet server

Why would you want to (re) create a server using specs that are over 25 years old?

I wanted to know if I could create a telnet server using the RFC's on Telnet. Guess what: I can.

Was it easy?

Hell no. I don't have all things figured out as I wanted them but I am happy with the results.

What can it do?

No much. It was a small experiment. The server will negotiate on terminal type, line mode, echo and naws. Meaning:

• It will know how big your terminal is and if it supports 256 colors or not.
• I will echo itself; so each character is send to the server instead of each line (inefficient but fun for games of weird demo stuff).

Sounds really easy...

Well the specs tell a lot but finding the right order to handle the commands; that was not mentioned in the specs. It took some searching on the internet in existing code, stackoverflow and experimenting. So no: not really.

Did you test it?

Yep. Used putty as client and the (gnu) telnet. They actually send different command to the server. They both implement the specs but still differ a bit.

Builing the code

gradle run

Will build and start the telnet server on port 2300. Type help for info.