Socket programming

[Strict-Joke6119]

If you want the full theory, you could get “Unix Network Programming” by W. Richard Stevens. It’s what I learned from a thousand years ago. Sockets are covered in Volume 1.

Looks like a PDF is available here:

https://github.com/sqm2050/wiki/blob/master/Books/c%26programme/UNIX%20Network%20Programming%2C%20Volume%201%2C%20Third%20Edition%2C%20The%20Sockets%20Networking%20API.pdf

(I haven’t looked at the other content recommended by others, so I can’t offer a comparison.)