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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644 (file)
index 0000000..aad7c44
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "dragonblocks"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "3.2.15", features = ["derive"] }
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1.0.144", features = ["derive"] }
+serde_cbor = "0.11.2"
+connect = "0.2.4"

diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644 (file)
index 0000000..ff3a1a1
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly-2022-07-24"

diff --git a/src/client.rs b/src/client.rs
new file mode 100644 (file)
index 0000000..0382ee7
--- /dev/null
+++ b/src/client.rs
@@ -0,0 +1,50 @@
+use super::pkt;
+use super::quit::Quit;
+use super::server::pkts as server_bound;
+use connect::{Connection, ConnectionReader, ConnectionWriter, StreamExt};
+use tokio::sync::Mutex as AsyncMutex;
+
+pub struct Client {
+    pub conn: AsyncMutex<ConnectionWriter>,
+    quit: Quit,
+}
+
+impl Client {
+    pub async fn run(addr: &str, quit: Quit) {
+        let (reader, writer) = Connection::tcp_client(addr).await.unwrap().split();
+
+        println!("client connect {addr}");
+        Self {
+            conn: AsyncMutex::new(writer),
+            quit,
+        }
+        .run_loop(reader)
+        .await;
+    }
+
+    async fn run_loop(self, mut reader: ConnectionReader) {
+        let mut quit = self.quit.subscribe();
+
+        pkt::put(
+            &self.conn,
+            server_bound::LOGIN,
+            &server_bound::Login {
+                name: "player".into(),
+                pwd: "password123".into(),
+            },
+        )
+        .await;
+
+        loop {
+            tokio::select! {
+                Some(msg) = reader.next() => {
+                    println!("{}", msg.recipient());
+                },
+                _ = quit.recv() => break,
+                else => break,
+            }
+        }
+
+        println!("client disconnect");
+    }
+}

diff --git a/src/main.rs b/src/main.rs
new file mode 100644 (file)
index 0000000..6274716
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,66 @@
+#![feature(if_let_guard)]
+
+mod client;
+mod pkt;
+mod quit;
+mod server;
+
+use clap::{Parser, Subcommand};
+use client::Client;
+use quit::Quit;
+use server::Server;
+use tokio::{signal, task};
+
+#[derive(Parser)]
+#[clap(version, about, long_about = None)]
+struct Args {
+    /// Select client/server/multiplayer mode
+    #[clap(subcommand)]
+    mode: Mode,
+}
+
+#[derive(Subcommand)]
+enum Mode {
+    /// Connect to a remote server
+    Client {
+        /// Address to connect to
+        #[clap(value_parser)]
+        address: String,
+    },
+    /// Host a server
+    Server {
+        /// Address to listen to
+        #[clap(value_parser)]
+        address: String,
+    },
+    /// Host a local server and connect to it
+    Singleplayer {
+        /// Optionally open the game to LAN
+        #[clap(value_parser, default_value_t = String::from("127.0.0.1:49120"))]
+        address: String,
+    },
+}
+
+#[tokio::main(flavor = "multi_thread")]
+async fn main() {
+    let args = Args::parse();
+
+    let (quit, mut quit_confirm) = Quit::new();
+
+    let quit_ctrl_c = quit.clone();
+    task::spawn(async move {
+        signal::ctrl_c().await.unwrap();
+        quit_ctrl_c.quit();
+    });
+
+    match args.mode {
+        Mode::Server { address } => Server::new(&address, quit).await.run().await,
+        Mode::Client { address } => Client::run(&address, quit).await,
+        Mode::Singleplayer { address } => {
+            let server = Server::new(&address, quit.clone()).await;
+            tokio::join!(server.run(), Client::run(&address, quit));
+        }
+    }
+
+    let _ = quit_confirm.recv().await;
+}

diff --git a/src/pkt.rs b/src/pkt.rs
new file mode 100644 (file)
index 0000000..9147cb1
--- /dev/null
+++ b/src/pkt.rs
@@ -0,0 +1,15 @@
+use connect::{ConnectDatagram, ConnectionWriter, SinkExt};
+use serde::{Deserialize, Serialize};
+use tokio::sync::Mutex as AsyncMutex;
+
+pub fn get<'a, T: Deserialize<'a>>(pkt: &'a ConnectDatagram) -> Option<T> {
+    serde_cbor::from_slice(pkt.data()?).ok()
+}
+
+pub async fn put<T: Serialize>(conn: &AsyncMutex<ConnectionWriter>, id: u16, pkt: &T) {
+    conn.lock()
+        .await
+        .send(ConnectDatagram::new(id, serde_cbor::to_vec(pkt).unwrap()).unwrap())
+        .await
+        .unwrap();
+}

diff --git a/src/quit.rs b/src/quit.rs
new file mode 100644 (file)
index 0000000..a59d921
--- /dev/null
+++ b/src/quit.rs
@@ -0,0 +1,26 @@
+use tokio::sync::{broadcast, mpsc};
+
+#[derive(Clone)]
+pub struct Quit {
+    signal: broadcast::Sender<()>,
+
+    #[allow(unused)]
+    confirm: mpsc::Sender<()>,
+}
+
+impl Quit {
+    pub fn new() -> (Self, mpsc::Receiver<()>) {
+        let (confirm, confirm_recv) = mpsc::channel(1);
+        let (signal, _) = broadcast::channel(1);
+
+        (Self { confirm, signal }, confirm_recv)
+    }
+
+    pub fn quit(&self) {
+        self.signal.send(()).unwrap();
+    }
+
+    pub fn subscribe(&self) -> broadcast::Receiver<()> {
+        self.signal.subscribe()
+    }
+}

diff --git a/src/server.rs b/src/server.rs
new file mode 100644 (file)
index 0000000..f68f945
--- /dev/null
+++ b/src/server.rs
@@ -0,0 +1,114 @@
+#![allow(unused)]
+
+pub mod pkts;
+
+use super::pkt;
+use super::quit::Quit;
+use connect::{tcp::TcpListener, ConnectDatagram, ConnectionReader, ConnectionWriter, StreamExt};
+use pkts::*;
+use std::{
+    collections::HashMap,
+    sync::{Arc, RwLock, Weak},
+};
+use tokio::{
+    sync::{broadcast, mpsc, Mutex as AsyncMutex},
+    task,
+};
+
+type ClientId = u64;
+
+pub struct Client {
+    pub id: ClientId,
+    pub conn: AsyncMutex<ConnectionWriter>,
+    pub server: Weak<ServerData>,
+    quit: Quit,
+}
+
+impl Client {
+    async fn login(&self, pkt: &Login) {
+        println!("login {} {}", pkt.name, pkt.pwd);
+    }
+
+    async fn run(&self, mut reader: ConnectionReader) {
+        let mut quit = self.quit.subscribe();
+
+        loop {
+            tokio::select! {
+                Some(msg) = reader.next() => match msg.recipient() {
+                    LOGIN if let Some(pkt) = pkt::get::<Login>(&msg) =>
+                        self.login(&pkt).await,
+                    _ => {},
+                },
+                _ = quit.recv() => break,
+                else => break,
+            }
+        }
+
+        if let Some(server) = self.server.upgrade() {
+            server.clients_by_id.write().unwrap().remove(&self.id);
+        }
+
+        println!("disconnect {}", self.id);
+    }
+}
+
+pub struct ServerData {
+    clients_by_id: RwLock<HashMap<ClientId, Arc<Client>>>,
+    clients_by_name: RwLock<HashMap<String, Arc<Client>>>,
+}
+
+pub struct Server {
+    listener: TcpListener,
+    data: Arc<ServerData>,
+    quit: Quit,
+}
+
+impl Server {
+    pub async fn new(addr: &str, quit: Quit) -> Self {
+        println!("listen {addr}");
+
+        Self {
+            quit,
+            listener: TcpListener::bind(addr).await.unwrap(),
+            data: Arc::new(ServerData {
+                clients_by_id: RwLock::new(HashMap::new()),
+                clients_by_name: RwLock::new(HashMap::new()),
+            }),
+        }
+    }
+
+    pub async fn run(mut self) {
+        let mut next_id: ClientId = 0;
+        let mut quit = self.quit.subscribe();
+
+        loop {
+            tokio::select! {
+                Some(conn) = self.listener.next() => {
+                    println!("connect {}", conn.peer_addr());
+
+                    let (reader, writer) = conn.split();
+                    let client = Arc::new(Client {
+                        id: next_id,
+                        conn: AsyncMutex::new(writer),
+                        server: Arc::downgrade(&self.data),
+                        quit: self.quit.clone(),
+                    });
+
+                    self.data
+                        .clients_by_id
+                        .write()
+                        .unwrap()
+                        .insert(next_id, Arc::clone(&client));
+
+                    next_id += 1;
+
+                    task::spawn(async move { (*client).run(reader).await });
+                },
+                _ = quit.recv() => break,
+                else => break,
+            }
+        }
+
+        println!("shutdown");
+    }
+}

diff --git a/src/server/pkts.rs b/src/server/pkts.rs
new file mode 100644 (file)
index 0000000..ec3f1f5
--- /dev/null
+++ b/src/server/pkts.rs
@@ -0,0 +1,8 @@
+use serde::{Deserialize, Serialize};
+
+pub const LOGIN: u16 = 0;
+#[derive(Serialize, Deserialize)]
+pub struct Login {
+    pub name: String,
+    pub pwd: String,
+}