banished-relay

The Un-Banished multiplayer relay: a small WebSocket server with rooms. A host opens a room and gets its code; players join with the code. The relay numbers the players in the order they come (the host is 0), tells everyone in the room who comes and goes, and passes each player's data on to one player or to all the others, without reading it. So nobody forwards a port: the host and the players all connect out to the relay. The protocol is in banished-net.

cargo run --release -p banished-relay -- 0.0.0.0:7780     # the default address

Each connection has a thread; a room closes when its last player leaves. The relay speaks plain ws://. A page served over https:// (the published site) may only open wss://, so a public relay needs TLS in front of it (a reverse proxy such as Caddy or nginx).

Source	What it holds
src/main.rs	The listener, one thread per connection, the rooms, room codes, and a test of a host and two players

tools/compat/network.sh starts a relay and plays several games through it. See MULTIPLAYER-PLAN.md, step 5.