bones_matchmaker 0.4.0

Simple matchmaking server for games.
Documentation 
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#![doc = include_str!("../README.md")]
// This cfg_attr is needed because `rustdoc::all` includes lints not supported on stable
#![cfg_attr(doc, allow(unknown_lints))]
#![deny(rustdoc::all)]
#[macro_use]
extern crate tracing;

use std::net::SocketAddr;

use bones_matchmaker_proto::MATCH_ALPN;
use iroh_net::key::SecretKey;

pub mod cli;

mod matchmaker;

#[derive(clap::Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Config {
    /// The server address to listen on
    #[clap(short, long = "listen", default_value = "0.0.0.0:8943")]
    listen_addr: SocketAddr,
    /// If enabled, prints the current secret key. Use with caution.
    #[clap(long)]
    print_secret_key: bool,
    /// Use this secret key for the node
    #[clap(short, long, env = "BONES_MATCHMAKER_SECRET_KEY")]
    secret_key: Option<iroh_net::key::SecretKey>,
}

async fn server(args: Config) -> anyhow::Result<()> {
    let port = args.listen_addr.port();

    match args.secret_key {
        Some(ref key) => {
            info!("Using existing key: {}", key.public());
        }
        None => {
            info!("Generating new key");
        }
    }

    let secret_key = args.secret_key.unwrap_or_else(SecretKey::generate);

    if args.print_secret_key {
        println!("Secret Key: {}", secret_key);
    }

    let endpoint = iroh_net::Endpoint::builder()
        .alpns(vec![MATCH_ALPN.to_vec()])
        .discovery(Box::new(
            iroh_net::discovery::ConcurrentDiscovery::from_services(vec![
                Box::new(iroh_net::discovery::dns::DnsDiscovery::n0_dns()),
                Box::new(iroh_net::discovery::pkarr::PkarrPublisher::n0_dns(
                    secret_key.clone(),
                )),
            ]),
        ))
        .secret_key(secret_key)
        .bind(port)
        .await?;

    let my_addr = endpoint.node_addr().await?;

    info!(address=?my_addr, "Started server");

    println!("Node ID: {}", my_addr.node_id);

    // Listen for incomming connections
    while let Some(connecting) = endpoint.accept().await {
        let connection = connecting.await;

        match connection {
            Ok(conn) => {
                info!(
                    connection_id = conn.stable_id(),
                    "Accepted connection from client"
                );

                // Spawn a task to handle the new connection
                tokio::task::spawn(matchmaker::handle_connection(endpoint.clone(), conn));
            }
            Err(e) => error!("Error opening client connection: {e:?}"),
        }
    }

    info!("Server shutdown");

    Ok(())
}