How to understand a GitHub project?

Question

Programming

There is a GitHub project in c++. There are many different .cpp and .h files in the folders.
The project itself is a program that accesses the game server.
So, in pure c ++, of course, there are no functions that access the game server .. But somehow, from this set of files in compiled form, does it access it? Where can I find these non-standard functions, where are they connected?
https://github.com/P3ti/RakSAMP

Answer 1

The raknet folder contains the entire implementation of the network subsystem.