From 34190a70b1efa0972ef58b88d356f985c46b89ae Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Sat, 21 Sep 2024 15:31:18 +0200
Subject: server: mdns and upnp

---
 server/src/network/mdns.rs | 61 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 server/src/network/mdns.rs

(limited to 'server/src/network/mdns.rs')

diff --git a/server/src/network/mdns.rs b/server/src/network/mdns.rs
new file mode 100644
index 00000000..870ae7ec
--- /dev/null
+++ b/server/src/network/mdns.rs
@@ -0,0 +1,61 @@
+use crate::server::Server;
+use anyhow::Result;
+use get_if_addrs::get_if_addrs;
+use hurrycurry_protocol::VERSION;
+use log::{info, warn};
+use mdns_sd::{ServiceDaemon, ServiceInfo};
+use rand::random;
+use std::{collections::HashMap, sync::Arc, time::Duration};
+use tokio::{sync::RwLock, time::interval};
+
+pub async fn mdns_loop(name: String, port: u16, state: Arc<RwLock<Server>>) {
+    let d = match ServiceDaemon::new() {
+        Ok(d) => d,
+        Err(e) => {
+            warn!("mDNS daemon failed to start: {e}");
+            return;
+        }
+    };
+    let mut interval = interval(Duration::from_secs(60));
+    let hostname = format!("hks-{}.local.", random::<u64>());
+    loop {
+        interval.tick().await;
+        if let Err(e) = update_service(&d, &state, &name, &hostname, port).await {
+            warn!("mDNS service update failed: {e}");
+        }
+        info!("updated mDNS service record");
+    }
+}
+
+async fn update_service(
+    d: &ServiceDaemon,
+    state: &Arc<RwLock<Server>>,
+    name: &str,
+    hostname: &str,
+    port: u16,
+) -> Result<()> {
+    let addrs = get_if_addrs()?
+        .into_iter()
+        .map(|e| e.addr.ip())
+        .filter(|a| !a.is_loopback())
+        .collect::<Vec<_>>();
+
+    let players = state.read().await.count_chefs();
+
+    d.register(ServiceInfo::new(
+        "_hurrycurry._tcp.local.",
+        name,
+        hostname,
+        &*addrs,
+        port,
+        HashMap::from_iter([
+            ("players".to_string(), players.to_string()),
+            ("version".to_string(), env!("CARGO_PKG_VERSION").to_string()),
+            (
+                "protocol".to_string(),
+                format!("{}.{}", VERSION.0, VERSION.1),
+            ),
+        ]),
+    )?)?;
+    Ok(())
+}
-- 
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