From 858d41265c134b6eb571c7af46d568ae0648e493 Mon Sep 17 00:00:00 2001
From: ddidderr <ddidderr@paul.network>
Date: Sat, 8 Nov 2025 16:49:36 +0100
Subject: [PATCH] p2p: mDNS

---
 crates/lanspread-mdns/src/lib.rs              |  3 +-
 crates/lanspread-server/src/main.rs           | 47 +++++++------------
 .../src-tauri/src/lib.rs                      |  4 +-
 3 files changed, 19 insertions(+), 35 deletions(-)

diff --git a/crates/lanspread-mdns/src/lib.rs b/crates/lanspread-mdns/src/lib.rs
index e2f86ca..7559061 100644
--- a/crates/lanspread-mdns/src/lib.rs
+++ b/crates/lanspread-mdns/src/lib.rs
@@ -7,7 +7,6 @@ pub use mdns_sd::DaemonEvent;
 use mdns_sd::{Receiver, ServiceDaemon, ServiceEvent, ServiceInfo};
 
 pub const LANSPREAD_SERVICE_TYPE: &str = "_lanspread._udp.local.";
-pub const LANSPREAD_INSTANCE_NAME: &str = "softlan";
 
 pub struct MdnsAdvertiser {
     daemon: ServiceDaemon,
@@ -74,7 +73,7 @@ pub fn discover_service(
 
                 if let Some(address) = info.get_addresses().iter().next() {
                     tracing::info!("Found server at {}:{}", address, info.get_port());
-                    return Ok((*address, info.get_port()).into());
+                    return Ok((address.to_ip_addr(), info.get_port()).into());
                 }
 
                 tracing::error!(?info, "No address found in mDNS response.");
diff --git a/crates/lanspread-server/src/main.rs b/crates/lanspread-server/src/main.rs
index 410026c..152b9ba 100644
--- a/crates/lanspread-server/src/main.rs
+++ b/crates/lanspread-server/src/main.rs
@@ -9,49 +9,34 @@ mod req;
 
 use std::{convert::Into, net::SocketAddr, time::Duration};
 
-use chrono::{DateTime, Local};
 use clap::Parser as _;
 use cli::Cli;
 use gethostname::gethostname;
 use lanspread_compat::eti;
 use lanspread_db::db::{Game, GameDB};
-use lanspread_mdns::{
-    DaemonEvent,
-    LANSPREAD_INSTANCE_NAME,
-    LANSPREAD_SERVICE_TYPE,
-    MdnsAdvertiser,
-};
+use lanspread_mdns::{DaemonEvent, LANSPREAD_SERVICE_TYPE, MdnsAdvertiser};
 use tracing_subscriber::EnvFilter;
 use uuid::Uuid;
 
 fn spawn_mdns_task(server_addr: SocketAddr) -> eyre::Result<()> {
-    let combined_str = if 1 == 2 {
-        let peer_id = Uuid::now_v7().simple().to_string();
+    let peer_id = Uuid::now_v7().simple().to_string();
 
-        let uidddd = Uuid::now_v7();
+    let hostname = gethostname();
+    let hostname_str = hostname.to_str().unwrap_or("");
 
-        // TODO
-        let uidddd = uidddd
-            .get_timestamp()
-            .expect("failed to get timestamp from UUID")
-            .to_unix();
-
-        let local_datetime: DateTime<Local> =
-            DateTime::from_timestamp(i64::try_from(uidddd.0).unwrap_or(0), uidddd.1)
-                .expect("Failed to create DateTime from uuid unix timestamp")
-                .into();
-
-        dbg!(local_datetime);
-
-        let hostname = gethostname();
-        let mut hostname = hostname.to_str().unwrap_or("");
-
-        if hostname.len() + peer_id.len() > 63 {
-            hostname = &hostname[..63 - peer_id.len()];
-        }
-        format!("{hostname}-{peer_id}")
+    // Calculate maximum hostname length that fits with UUID in 63 char limit
+    let max_hostname_len = 63usize.saturating_sub(peer_id.len() + 1); // +1 for the dash
+    let truncated_hostname = if hostname_str.len() > max_hostname_len {
+        hostname_str.get(..max_hostname_len).unwrap_or(hostname_str)
     } else {
-        String::from(LANSPREAD_INSTANCE_NAME)
+        hostname_str
+    };
+
+    let combined_str = if truncated_hostname.is_empty() {
+        // If no hostname is available, use just the UUID
+        peer_id
+    } else {
+        format!("{truncated_hostname}-{peer_id}")
     };
 
     let mdns = MdnsAdvertiser::new(LANSPREAD_SERVICE_TYPE, &combined_str, server_addr)?;
diff --git a/crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs b/crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs
index fa2d3da..42ed595 100644
--- a/crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs
+++ b/crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs
@@ -8,7 +8,7 @@ use std::{
 use eyre::bail;
 use lanspread_client::{ClientCommand, ClientEvent};
 use lanspread_db::db::{Game, GameDB};
-use lanspread_mdns::{LANSPREAD_INSTANCE_NAME, LANSPREAD_SERVICE_TYPE, discover_service};
+use lanspread_mdns::{LANSPREAD_SERVICE_TYPE, discover_service};
 use tauri::{AppHandle, Emitter as _, Manager};
 use tauri_plugin_shell::{ShellExt, process::Command};
 use tokio::sync::{RwLock, mpsc::UnboundedSender};
@@ -233,7 +233,7 @@ async fn find_server(app: AppHandle) {
     log::info!("Looking for server...");
 
     loop {
-        match discover_service(LANSPREAD_SERVICE_TYPE, Some(LANSPREAD_INSTANCE_NAME)) {
+        match discover_service(LANSPREAD_SERVICE_TYPE, None) {
             Ok(server_addr) => {
                 log::info!("Found server at {server_addr}");
                 let state: tauri::State<LanSpreadState> = app.state();