1 #![feature(cursor_remaining)]
2 #![feature(hash_drain_filter)]
8 use async_trait::async_trait;
9 use byteorder::{BigEndian, WriteBytesExt};
10 pub use client::{connect, Sender as Client};
11 use num_enum::TryFromPrimitive;
17 use tokio::sync::{mpsc, RwLock};
19 pub const PROTO_ID: u32 = 0x4f457403;
20 pub const UDP_PKT_SIZE: usize = 512;
21 pub const NUM_CHANS: usize = 3;
22 pub const REL_BUFFER: usize = 0x8000;
23 pub const INIT_SEQNUM: u16 = 65500;
24 pub const TIMEOUT: u64 = 30;
27 pub trait UdpSender: Send + Sync + 'static {
28 async fn send(&self, data: Vec<u8>) -> io::Result<()>;
32 pub trait UdpReceiver: Send + Sync + 'static {
33 async fn recv(&self) -> io::Result<Vec<u8>>;
36 #[derive(Debug, Copy, Clone, PartialEq)]
44 #[derive(Debug, Copy, Clone, PartialEq, TryFromPrimitive)]
53 #[derive(Debug, Copy, Clone, PartialEq, TryFromPrimitive)]
69 pub type Error = error::Error;
70 pub type InPkt = Result<Pkt<Vec<u8>>, Error>;
76 pub struct RudpShare<S: UdpSender> {
78 pub remote_id: RwLock<u16>,
79 pub chans: Vec<AckChan>,
84 pub struct RudpReceiver<S: UdpSender> {
85 share: Arc<RudpShare<S>>,
86 pkt_rx: mpsc::UnboundedReceiver<InPkt>,
90 pub struct RudpSender<S: UdpSender> {
91 share: Arc<RudpShare<S>>,
94 impl<S: UdpSender> RudpShare<S> {
95 pub async fn send(&self, tp: PktType, pkt: Pkt<&[u8]>) -> io::Result<()> {
96 let mut buf = Vec::with_capacity(4 + 2 + 1 + 1 + pkt.data.len());
97 buf.write_u32::<BigEndian>(PROTO_ID)?;
98 buf.write_u16::<BigEndian>(*self.remote_id.read().await)?;
99 buf.write_u8(pkt.chan as u8)?;
100 buf.write_u8(tp as u8)?;
101 buf.write(pkt.data)?;
103 self.udp_tx.send(buf).await?;
109 impl<S: UdpSender> RudpSender<S> {
110 pub async fn send(&self, pkt: Pkt<&[u8]>) -> io::Result<()> {
111 self.share.send(PktType::Orig, pkt).await // TODO
114 pub async fn peer_id(&self) -> u16 {
118 pub async fn is_server(&self) -> bool {
119 self.share.id == PeerID::Srv as u16
123 impl<S: UdpSender> RudpReceiver<S> {
124 pub async fn peer_id(&self) -> u16 {
128 pub async fn is_server(&self) -> bool {
129 self.share.id == PeerID::Srv as u16
133 impl<S: UdpSender> ops::Deref for RudpReceiver<S> {
134 type Target = mpsc::UnboundedReceiver<InPkt>;
136 fn deref(&self) -> &Self::Target {
141 impl<S: UdpSender> ops::DerefMut for RudpReceiver<S> {
142 fn deref_mut(&mut self) -> &mut Self::Target {
147 pub fn new<S: UdpSender, R: UdpReceiver>(
152 ) -> (RudpSender<S>, RudpReceiver<S>) {
153 let (pkt_tx, pkt_rx) = mpsc::unbounded_channel();
155 let share = Arc::new(RudpShare {
157 remote_id: RwLock::new(remote_id),
159 chans: (0..NUM_CHANS).map(|_| AckChan).collect(),
161 let recv_share = Arc::clone(&share);
164 let worker = recv_worker::RecvWorker::new(udp_rx, recv_share, pkt_tx);
170 share: Arc::clone(&share),
172 RudpReceiver { share, pkt_rx },
179 async fn main() -> io::Result<()> {
180 let (tx, mut rx) = connect("127.0.0.1:30000").await?;
182 let mut mtpkt = vec![];
183 mtpkt.write_u16::<BigEndian>(2)?; // high level type
184 mtpkt.write_u8(29)?; // serialize ver
185 mtpkt.write_u16::<BigEndian>(0)?; // compression modes
186 mtpkt.write_u16::<BigEndian>(40)?; // MinProtoVer
187 mtpkt.write_u16::<BigEndian>(40)?; // MaxProtoVer
188 mtpkt.write_u16::<BigEndian>(3)?; // player name length
189 mtpkt.write(b"foo")?; // player name
198 while let Some(result) = rx.recv().await {
201 io::stdout().write(pkt.data.as_slice())?;
203 Err(err) => eprintln!("Error: {}", err),