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![](https://linux.community/api/v3/image_proxy?url=https%3A%2F%2Flemmy.ml%2Fpictrs%2Fimage%2Fa64z2tlDDD.png)
What you are looking for is local peer-to-peer file sharing. When I was studying, we used eMule, but that is for Windows and old. I don’t have a concrete software suggestion, but looking around the gnutella protocol could be promising.
Edit: QuantumCogs suggestion is also good, the use cases are slightly different.
https://proton.me/pass