Various fixes and improvements

TODO.md

@@ -25,8 +25,3 @@
 - hold back packets (whitelist), forward to server at connect before joining
 - add support for forge (emulate mod list communication)
 - on login plugin request during login state, respond with empty payload, not supported
-
-# Extra
-
-- simply don't occupy in lobby if we don't have probed data
-- dont use mutex for server data

src/forge.rs

@@ -38,6 +38,10 @@ pub const CHANNEL_LOGIN_WRAPPER: &str = "fml:loginwrapper";
 /// Forge handshake channel.
 pub const CHANNEL_HANDSHAKE: &str = "fml:handshake";
 
+/// Timeout for draining Forge plugin responses from client.
+#[cfg(feature = "lobby")]
+const CLIENT_DRAIN_FORGE_TIMEOUT: Duration = Duration::from_secs(5);
+
 /// Respond with Forge login wrapper packet.
 pub async fn respond_forge_login_packet(
     client: &Client,
@@ -165,14 +169,14 @@ pub async fn replay_login_payload(
     debug!(target: "lazymc::lobby", "Replaying Forge login procedure for lobby client...");
 
     // Replay each Forge packet
-    for packet in server.forge_payload.lock().await.as_slice() {
+    for packet in server.forge_payload.read().await.as_slice() {
         inbound.write_all(packet).await.map_err(|err| {
             error!(target: "lazymc::lobby", "Failed to send Forge join payload to lobby client, will likely cause issues: {}", err);
         })?;
     }
 
     // Drain all responses
-    let count = server.forge_payload.lock().await.len();
+    let count = server.forge_payload.read().await.len();
     drain_forge_responses(client, inbound, inbound_buf, count).await?;
 
     trace!(target: "lazymc::lobby", "Forge join payload replayed");
@@ -197,10 +201,9 @@ async fn drain_forge_responses(
             return Ok(());
         }
 
-        // TODO: move timeout into constant
+        // Read packet from stream with timeout
         let read_packet_task = packet::read_packet(client, buf, &mut reader);
-        let timeout = time::timeout(Duration::from_secs(5), read_packet_task).await;
+        let timeout = time::timeout(CLIENT_DRAIN_FORGE_TIMEOUT, read_packet_task).await;
-
         let read_packet_task = match timeout {
             Ok(result) => result,
             Err(_) => {

src/join/lobby.rs

@@ -37,7 +37,7 @@ pub async fn occupy(
 
 /// Check whether we still have to probe before we can use the lobby.
 async fn must_still_probe(config: &Config, server: &Server) -> bool {
-    must_probe(config) && server.probed_join_game.lock().await.is_none()
+    must_probe(config) && server.probed_join_game.read().await.is_none()
 }
 
 /// Check whether we must have probed data.

src/probe.rs

@@ -53,7 +53,7 @@ pub async fn probe(config: Arc<Config>, server: Arc<Server>) -> Result<(), ()> {
 
     // Connect to server, record Forge payload
     let forge_payload = connect_to_server(&config, &server).await?;
-    *server.forge_payload.lock().await = forge_payload;
+    *server.forge_payload.write().await = forge_payload;
 
     Ok(())
 }
@@ -277,7 +277,11 @@ async fn connect_to_server_no_timeout(
             let join_game_data =
                 wait_for_server_join_game(&tmp_client, &tmp_client_info, &mut outbound, &mut buf)
                     .await?;
-            server.probed_join_game.lock().await.replace(join_game_data);
+            server
+                .probed_join_game
+                .write()
+                .await
+                .replace(join_game_data);
 
             // Gracefully close connection
             let _ = net::close_tcp_stream(outbound).await;

src/proto/packets/play/join_game.rs

@@ -106,11 +106,10 @@ pub async fn lobby_send(
     server: &Server,
 ) -> Result<(), ()> {
     let status = server.status().await;
-    let join_game = server.probed_join_game.lock().await;
+    let join_game = server.probed_join_game.read().await;
 
     // Get dimension codec and build lobby dimension
-    let dimension_codec: CompoundTag =
+    let dimension_codec: CompoundTag = if let Some(join_game) = join_game.as_ref() {
-        if let Some(join_game) = server.probed_join_game.lock().await.as_ref() {
         join_game
             .dimension_codec
             .clone()

src/server.rs

@@ -81,10 +81,13 @@ pub struct Server {
     #[cfg(feature = "rcon")]
     rcon_last_stop: Mutex<Option<Instant>>,
 
-    // TODO: dont use mutex, do not make public, dont use bytesmut
+    /// Probed join game data.
-    pub forge_payload: Mutex<Vec<Vec<u8>>>,
+    pub probed_join_game: RwLock<Option<JoinGameData>>,
-    // TODO: dont use mutex, do not make public, dont use bytesmut
+
-    pub probed_join_game: Mutex<Option<JoinGameData>>,
+    /// Forge payload.
+    ///
+    /// Sent to clients when they connect to lobby. Recorded from server by probe.
+    pub forge_payload: RwLock<Vec<Vec<u8>>>,
 }
 
 impl Server {
@@ -372,8 +375,8 @@ impl Default for Server {
             rcon_lock: Semaphore::new(1),
             #[cfg(feature = "rcon")]
             rcon_last_stop: Default::default(),
-            forge_payload: Default::default(),
             probed_join_game: Default::default(),
+            forge_payload: Default::default(),
         }
     }
 }