Add Tick system

.gitignore

@@ -76,13 +76,10 @@ Cargo.lock
 #.idea/
 
 # === PROJECT SPECIFIC ===
-# mc decompiled source
-mc-source-code/
-
 plugins/*
 world/*
 
-# project's binary configurations
+# project's configurations
 configuration.toml
 features.toml
 

pumpkin-config/src/lib.rs

@@ -91,6 +91,8 @@ pub struct BasicConfiguration {
     /// The server's description displayed on the status screen.
     #[serde_inline_default("A Blazing fast Pumpkin Server!".to_string())]
     pub motd: String,
+    #[serde_inline_default(20.0)]
+    pub tps: f32,
     /// The default game mode for players.
     #[serde_inline_default(GameMode::Survival)]
     pub default_gamemode: GameMode,
@@ -123,6 +125,7 @@ impl Default for BasicConfiguration {
             online_mode: true,
             encryption: true,
             motd: "A Blazing fast Pumpkin Server!".to_string(),
+            tps: 20.0,
             default_gamemode: GameMode::Survival,
             scrub_ips: true,
             use_favicon: true,

pumpkin-protocol/src/client/play/c_keep_alive.rs

@@ -4,5 +4,11 @@ use serde::Serialize;
 #[packet(0x26)]
 #[derive(Serialize)]
 pub struct CKeepAlive {
-    pub keep_alive_id: i64,
+    keep_alive_id: i64,
+}
+
+impl CKeepAlive {
+    pub fn new(keep_alive_id: i64) -> Self {
+        Self { keep_alive_id }
+    }
 }

pumpkin/src/client/mod.rs

@@ -105,7 +105,6 @@ pub struct Client {
     /// The underlying TCP connection to the client.
     pub connection_reader: Arc<Mutex<tokio::net::tcp::OwnedReadHalf>>,
     pub connection_writer: Arc<Mutex<tokio::net::tcp::OwnedWriteHalf>>,
-
     /// The client's IP address.
     pub address: Mutex<SocketAddr>,
     /// The packet encoder for outgoing packets.
@@ -114,22 +113,12 @@ pub struct Client {
     dec: Arc<Mutex<PacketDecoder>>,
     /// A queue of raw packets received from the client, waiting to be processed.
     pub client_packets_queue: Arc<Mutex<VecDeque<RawPacket>>>,
-
     /// Indicates whether the client should be converted into a player.
     pub make_player: AtomicBool,
-    /// Sends each keep alive packet that the server receives for a player to here, which gets picked up in a tokio task
-    pub keep_alive_sender: Arc<tokio::sync::mpsc::Sender<i64>>,
-    /// Stores the last time it was confirmed that the client is alive
-    pub last_alive_received: AtomicCell<std::time::Instant>,
 }
 
 impl Client {
-    pub fn new(
-        id: usize,
-        connection: tokio::net::TcpStream,
-        address: SocketAddr,
-        keep_alive_sender: Arc<tokio::sync::mpsc::Sender<i64>>,
-    ) -> Self {
+    pub fn new(id: usize, connection: tokio::net::TcpStream, address: SocketAddr) -> Self {
         let (connection_reader, connection_writer) = connection.into_split();
         Self {
             protocol_version: AtomicI32::new(0),
@@ -148,8 +137,6 @@ impl Client {
             closed: AtomicBool::new(false),
             client_packets_queue: Arc::new(Mutex::new(VecDeque::new())),
             make_player: AtomicBool::new(false),
-            keep_alive_sender,
-            last_alive_received: AtomicCell::new(std::time::Instant::now()),
         }
     }
 
@@ -382,12 +369,13 @@ impl Client {
 
     /// Reads the connection until our buffer of len 4096 is full, then decode
     /// Close connection when an error occurs or when the Client closed the connection
-    pub async fn poll(&self) {
+    /// Returns if connection is still open
+    pub async fn poll(&self) -> bool {
         loop {
             let mut dec = self.dec.lock().await;
             if let Ok(Some(packet)) = dec.decode() {
                 self.add_packet(packet).await;
-                return;
+                return true;
             };
 
             dec.reserve(4096);
@@ -403,7 +391,7 @@ impl Client {
                 == 0
             {
                 self.close();
-                return;
+                return false;
             }
 
             // This should always be an O(1) unsplit because we reserved space earlier and

pumpkin/src/client/player_packet.rs

@@ -15,6 +15,7 @@ use pumpkin_core::{
 };
 use pumpkin_entity::EntityId;
 use pumpkin_inventory::{InventoryError, WindowType};
+use pumpkin_protocol::server::play::{SCloseContainer, SKeepAlive, SSetPlayerGround, SUseItem};
 use pumpkin_protocol::{
     client::play::{
         Animation, CAcknowledgeBlockChange, CBlockUpdate, CEntityAnimation, CEntityVelocity,
@@ -22,10 +23,10 @@ use pumpkin_protocol::{
         CUpdateEntityPosRot, CUpdateEntityRot, CWorldEvent, FilterType,
     },
     server::play::{
-        Action, ActionType, SChatCommand, SChatMessage, SClientInformationPlay, SCloseContainer,
-        SConfirmTeleport, SInteract, SPlayPingRequest, SPlayerAbilities, SPlayerAction,
-        SPlayerCommand, SPlayerPosition, SPlayerPositionRotation, SPlayerRotation,
-        SSetCreativeSlot, SSetHeldItem, SSetPlayerGround, SSwingArm, SUseItem, SUseItemOn, Status,
+        Action, ActionType, SChatCommand, SChatMessage, SClientInformationPlay, SConfirmTeleport,
+        SInteract, SPlayPingRequest, SPlayerAbilities, SPlayerAction, SPlayerCommand,
+        SPlayerPosition, SPlayerPositionRotation, SPlayerRotation, SSetCreativeSlot, SSetHeldItem,
+        SSwingArm, SUseItemOn, Status,
     },
 };
 use pumpkin_world::block::{BlockFace, BlockState};
@@ -539,6 +540,22 @@ impl Player {
         }
     }
 
+    pub async fn handle_keep_alive(&self, keep_alive: SKeepAlive) {
+        if self
+            .wait_for_keep_alive
+            .load(std::sync::atomic::Ordering::Relaxed)
+            && keep_alive.keep_alive_id
+                == self
+                    .keep_alive_id
+                    .load(std::sync::atomic::Ordering::Relaxed)
+        {
+            self.wait_for_keep_alive
+                .store(false, std::sync::atomic::Ordering::Relaxed);
+        } else {
+            self.kick(TextComponent::text("Timeout")).await
+        }
+    }
+
     pub async fn handle_player_abilities(&self, player_abilities: SPlayerAbilities) {
         let mut abilities = self.abilities.lock().await;
 

pumpkin/src/entity/player.rs

@@ -1,6 +1,9 @@
-use std::sync::{
-    atomic::{AtomicI32, AtomicU8},
+use std::{
+    sync::{
+        atomic::{AtomicBool, AtomicI32, AtomicI64, AtomicU8},
         Arc,
+    },
+    time::{Duration, Instant},
 };
 
 use crossbeam::atomic::AtomicCell;
@@ -16,7 +19,7 @@ use pumpkin_inventory::player::PlayerInventory;
 use pumpkin_protocol::{
     bytebuf::packet_id::Packet,
     client::play::{
-        CGameEvent, CPlayDisconnect, CPlayerAbilities, CPlayerInfoUpdate, CSetHealth,
+        CGameEvent, CKeepAlive, CPlayDisconnect, CPlayerAbilities, CPlayerInfoUpdate, CSetHealth,
         CSyncPlayerPosition, CSystemChatMessage, GameEvent, PlayerAction,
     },
     server::play::{
@@ -85,9 +88,14 @@ pub struct Player {
     pub teleport_id_count: AtomicI32,
     /// The pending teleport information, including the teleport ID and target location.
     pub awaiting_teleport: Mutex<Option<(VarInt, Vector3<f64>)>>,
-
     /// The coordinates of the chunk section the player is currently watching.
     pub watched_section: AtomicCell<Vector3<i32>>,
+    /// Did we send a keep alive Packet and wait for the response?
+    pub wait_for_keep_alive: AtomicBool,
+    /// Whats the keep alive packet payload we send, The client should responde with the same id
+    pub keep_alive_id: AtomicI64,
+    /// Last time we send a keep alive
+    pub last_keep_alive_time: AtomicCell<Instant>,
 }
 
 impl Player {
@@ -133,6 +141,9 @@ impl Player {
             gamemode: AtomicCell::new(gamemode),
             watched_section: AtomicCell::new(Vector3::new(0, 0, 0)),
             last_position: AtomicCell::new(Vector3::new(0.0, 0.0, 0.0)),
+            wait_for_keep_alive: AtomicBool::new(false),
+            keep_alive_id: AtomicI64::new(0),
+            last_keep_alive_time: AtomicCell::new(std::time::Instant::now()),
         }
     }
 
@@ -150,6 +161,27 @@ impl Player {
             .await;
     }
 
+    pub async fn tick(&self) {
+        let now = Instant::now();
+        if now.duration_since(self.last_keep_alive_time.load()) >= Duration::from_secs(15) {
+            // We never got a response from our last keep alive we send
+            if self
+                .wait_for_keep_alive
+                .load(std::sync::atomic::Ordering::Relaxed)
+            {
+                self.kick(TextComponent::text("Timeout")).await;
+                return;
+            }
+            self.wait_for_keep_alive
+                .store(true, std::sync::atomic::Ordering::Relaxed);
+            self.last_keep_alive_time.store(now);
+            let id = now.elapsed().as_millis() as i64;
+            self.keep_alive_id
+                .store(id, std::sync::atomic::Ordering::Relaxed);
+            self.client.send_packet(&CKeepAlive::new(id)).await;
+        }
+    }
+
     pub const fn entity_id(&self) -> EntityId {
         self.living_entity.entity.entity_id
     }
@@ -418,11 +450,7 @@ impl Player {
                 Ok(())
             }
             SKeepAlive::PACKET_ID => {
-                self.client
-                    .keep_alive_sender
-                    .send(SKeepAlive::read(bytebuf)?.keep_alive_id)
-                    .await
-                    .unwrap();
+                self.handle_keep_alive(SKeepAlive::read(bytebuf)?).await;
                 Ok(())
             }
             _ => {

pumpkin/src/main.rs

@@ -18,11 +18,8 @@ compile_error!("Compiling for WASI targets is not supported!");
 use log::LevelFilter;
 
 use client::Client;
-use pumpkin_protocol::client::play::CKeepAlive;
-use pumpkin_protocol::ConnectionState;
-use server::Server;
+use server::{ticker::Ticker, Server};
 use std::io::{self};
-use std::time::Duration;
 
 // Setup some tokens to allow us to identify which event is for which socket.
 
@@ -126,6 +123,8 @@ async fn main() -> io::Result<()> {
     let rcon = ADVANCED_CONFIG.rcon.clone();
 
     let server = Arc::new(Server::new());
+    let mut ticker = Ticker::new(BASIC_CONFIG.tps);
+
     log::info!("Started Server took {}ms", time.elapsed().as_millis());
     log::info!("You now can connect to the server, Listening on {}", addr);
 
@@ -154,6 +153,12 @@ async fn main() -> io::Result<()> {
             RCONServer::new(&rcon, server).await.unwrap();
         });
     }
+    {
+        let server = server.clone();
+        tokio::spawn(async move {
+            ticker.run(&server).await;
+        });
+    }
     let mut unique_id = 0;
     loop {
         // Asynchronously wait for an inbound socket.
@@ -172,53 +177,19 @@ async fn main() -> io::Result<()> {
             id
         );
 
-        let keep_alive = tokio::sync::mpsc::channel(1024);
-        let client = Arc::new(Client::new(id, connection, addr, keep_alive.0.into()));
-
-        {
-            let client = client.clone();
-            let mut receiver = keep_alive.1;
-            tokio::spawn(async move {
-                let mut interval = tokio::time::interval(Duration::from_secs(1));
-                loop {
-                    interval.tick().await;
-                    let now = std::time::Instant::now();
-                    if client.connection_state.load() == ConnectionState::Play {
-                        if now.duration_since(client.last_alive_received.load())
-                            >= Duration::from_secs(15)
-                        {
-                            dbg!("no keep alive");
-                            client.kick("No keep alive received").await;
-                            break;
-                        }
-                        let random = rand::random::<i64>();
-                        client
-                            .send_packet(&CKeepAlive {
-                                keep_alive_id: random,
-                            })
-                            .await;
-                        if let Some(id) = receiver.recv().await {
-                            if id == random {
-                                client.last_alive_received.store(now);
-                            }
-                        }
-                    } else {
-                        client.last_alive_received.store(now);
-                    }
-                }
-            });
-        }
+        let client = Arc::new(Client::new(id, connection, addr));
 
         let server = server.clone();
         tokio::spawn(async move {
-            let server = &server; // Reference to server
             while !client.closed.load(std::sync::atomic::Ordering::Relaxed)
                 && !client
                     .make_player
                     .load(std::sync::atomic::Ordering::Relaxed)
             {
-                client.process_packets(server).await;
-                client.poll().await;
+                let open = client.poll().await;
+                if open {
+                    client.process_packets(&server).await
+                };
             }
             if client
                 .make_player
@@ -233,8 +204,10 @@ async fn main() -> io::Result<()> {
                     .closed
                     .load(std::sync::atomic::Ordering::Relaxed)
                 {
-                    player.process_packets(server).await;
-                    player.client.poll().await;
+                    let open = player.client.poll().await;
+                    if open {
+                        player.process_packets(&server).await
+                    };
                 }
                 player.remove().await;
             }

pumpkin/src/server/mod.rs

@@ -31,6 +31,8 @@ use crate::{
 
 mod connection_cache;
 mod key_store;
+pub mod ticker;
+
 pub const CURRENT_MC_VERSION: &str = "1.21.1";
 
 pub struct Server {
@@ -168,4 +170,10 @@ impl Server {
     pub fn digest_secret(&self, secret: &[u8]) -> String {
         self.key_store.get_digest(secret)
     }
+
+    async fn tick(&self) {
+        for world in &self.worlds {
+            world.tick().await;
+        }
+    }
 }

pumpkin/src/server/ticker.rs

@@ -0,0 +1,34 @@
+use std::time::{Duration, Instant};
+
+use super::Server;
+
+pub struct Ticker {
+    tick_interval: Duration,
+    last_tick: Instant,
+}
+
+impl Ticker {
+    pub fn new(tps: f32) -> Self {
+        Self {
+            tick_interval: Duration::from_millis((1000.0 / tps) as u64),
+            last_tick: Instant::now(),
+        }
+    }
+
+    /// IMPORTANT: Run this in a new thread/tokio task
+    pub async fn run(&mut self, server: &Server) {
+        loop {
+            let now = Instant::now();
+            let elapsed = now - self.last_tick;
+
+            if elapsed >= self.tick_interval {
+                server.tick().await;
+                self.last_tick = now;
+            } else {
+                // Wait for the remaining time until the next tick
+                let sleep_time = self.tick_interval - elapsed;
+                std::thread::sleep(sleep_time);
+            }
+        }
+    }
+}

pumpkin/src/world/mod.rs

@@ -81,6 +81,13 @@ impl World {
         }
     }
 
+    pub async fn tick(&self) {
+        let current_players = self.current_players.lock().await;
+        for player in current_players.values() {
+            player.tick().await;
+        }
+    }
+
     pub async fn spawn_player(&self, base_config: &BasicConfiguration, player: Arc<Player>) {
         // This code follows the vanilla packet order
         let entity_id = player.entity_id();