very simple P2P VPN(Virtual Network yes, Private maybe),
this program is intended to help you play LAN games over internet
when all clients are behind Full-cone NAT, does not work with clients behind Symmetric NAT
at least for now

how to run

install rustc and cargo or rustup, you will need 2024 edition
build using

# to build
cargo build --release
# to run server(registrar)
./target/release/server
# to run client
sudo ./target/release/client -r SERVER_IP -n NETWORK_ID -P PASSWORD # password is optional