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a/Cargo.toml b/Cargo.toml new file mode 100644 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 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 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, + 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 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 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 { + serde_cbor::from_slice(pkt.data()?).ok() +} + +pub async fn put(conn: &AsyncMutex, 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 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 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, + pub server: Weak, + 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::(&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>>, + clients_by_name: RwLock>>, +} + +pub struct Server { + listener: TcpListener, + data: Arc, + 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 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, +}