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#![feature(yeet_expr)]
#![feature(cursor_remaining)]
mod client;
pub mod error;
mod recv_worker;
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
pub use client::{connect, Sender as Client};
use num_enum::{TryFromPrimitive, TryFromPrimitiveError};
use std::{
io::{self, Write},
ops,
sync::{mpsc, Arc},
thread,
};
pub const PROTO_ID: u32 = 0x4f457403;
pub const UDP_PKT_SIZE: usize = 512;
pub const NUM_CHANS: usize = 3;
pub const REL_BUFFER: usize = 0x8000;
pub const INIT_SEQNUM: u16 = 65500;
pub type Error = error::Error;
pub trait UdpSender: Send + Sync + 'static {
fn send(&self, data: Vec<u8>) -> io::Result<()>;
}
pub trait UdpReceiver: Send + Sync + 'static {
fn recv(&self) -> io::Result<Vec<u8>>;
}
#[derive(Debug, Copy, Clone)]
pub enum PeerID {
Nil = 0,
Srv,
CltMin,
}
#[derive(Debug, Copy, Clone, PartialEq, TryFromPrimitive)]
#[repr(u8)]
pub enum PktType {
Ctl = 0,
Orig,
Split,
Rel,
}
#[derive(Debug, Copy, Clone, PartialEq, TryFromPrimitive)]
#[repr(u8)]
pub enum CtlType {
Ack = 0,
SetPeerID,
Ping,
Disco,
}
#[derive(Debug)]
pub struct Pkt<T> {
unrel: bool,
chan: u8,
data: T,
}
pub type InPkt = Result<Pkt<Vec<u8>>, Error>;
#[derive(Debug)]
pub struct AckChan;
#[derive(Debug)]
pub struct RudpShare<S: UdpSender> {
pub id: u16,
pub remote_id: u16,
pub chans: Vec<AckChan>,
udp_tx: S,
}
#[derive(Debug)]
pub struct RudpReceiver<S: UdpSender> {
share: Arc<RudpShare<S>>,
pkt_rx: mpsc::Receiver<InPkt>,
}
#[derive(Debug)]
pub struct RudpSender<S: UdpSender> {
share: Arc<RudpShare<S>>,
}
impl<S: UdpSender> RudpShare<S> {
pub fn new(id: u16, remote_id: u16, udp_tx: S) -> Self {
Self {
id,
remote_id,
udp_tx,
chans: (0..NUM_CHANS).map(|_| AckChan).collect(),
}
}
pub fn send(&self, tp: PktType, pkt: Pkt<&[u8]>) -> io::Result<()> {
let mut buf = Vec::with_capacity(4 + 2 + 1 + 1 + pkt.data.len());
buf.write_u32::<BigEndian>(PROTO_ID)?;
buf.write_u16::<BigEndian>(self.remote_id)?;
buf.write_u8(pkt.chan as u8)?;
buf.write_u8(tp as u8)?;
buf.write(pkt.data)?;
self.udp_tx.send(buf)?;
Ok(())
}
}
impl<S: UdpSender> RudpSender<S> {
pub fn send(&self, pkt: Pkt<&[u8]>) -> io::Result<()> {
self.share.send(PktType::Orig, pkt) // TODO
}
}
impl<S: UdpSender> ops::Deref for RudpReceiver<S> {
type Target = mpsc::Receiver<InPkt>;
fn deref(&self) -> &Self::Target {
&self.pkt_rx
}
}
pub fn new<S: UdpSender, R: UdpReceiver>(
id: u16,
remote_id: u16,
udp_tx: S,
udp_rx: R,
) -> (RudpSender<S>, RudpReceiver<S>) {
let (pkt_tx, pkt_rx) = mpsc::channel();
let share = Arc::new(RudpShare::new(id, remote_id, udp_tx));
let recv_share = Arc::clone(&share);
thread::spawn(move || {
recv_worker::RecvWorker::new(udp_rx, recv_share, pkt_tx).run();
});
(
RudpSender {
share: Arc::clone(&share),
},
RudpReceiver { share, pkt_rx },
)
}
// connect
fn main() -> io::Result<()> {
//println!("{}", x.deep_size_of());
let (tx, rx) = connect("127.0.0.1:30000")?;
let mut mtpkt = vec![];
mtpkt.write_u16::<BigEndian>(2)?; // high level type
mtpkt.write_u8(29)?; // serialize ver
mtpkt.write_u16::<BigEndian>(0)?; // compression modes
mtpkt.write_u16::<BigEndian>(40)?; // MinProtoVer
mtpkt.write_u16::<BigEndian>(40)?; // MaxProtoVer
mtpkt.write_u16::<BigEndian>(3)?; // player name length
mtpkt.write(b"foo")?; // player name
tx.send(Pkt {
unrel: true,
chan: 1,
data: &mtpkt,
})?;
while let Ok(result) = rx.recv() {
match result {
Ok(pkt) => {
io::stdout().write(pkt.data.as_slice())?;
}
Err(err) => eprintln!("Error: {}", err),
}
}
println!("disco");
Ok(())
}
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