The very first thing you might want to do in this folder is the following command:
git init
This will initialize your Git repository. You should also put it in a private repository (GitHub, GitLab, Bitbucket,... it is up to you but it has to stay private).
The Makefile contains all the required targets, but you might want to extend their behavior.
Very basic skelettons of receiver and sender source files are present, have a look to understand how you can enable logging or not.
Client:
./sender [IPv6] [Port]
Server:
./receiver [IPv6] [Port]
You might be interested in the link simulator that can be found at https://github.com/cnp3/Linksimulator
And finally, if this message is still there at your final submission, it looks like you forgot to provide a proper README.