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|
use super::*;
use std::{borrow::Cow, collections::HashMap, io, sync::Arc, time::Duration};
use tokio::{
sync::{mpsc, watch, Mutex, RwLock},
task::JoinSet,
};
#[derive(Debug)]
pub(crate) struct Ack {
pub(crate) tx: watch::Sender<bool>,
pub(crate) rx: watch::Receiver<bool>,
pub(crate) data: Vec<u8>,
}
#[derive(Debug)]
pub(crate) struct Chan {
pub(crate) acks: HashMap<u16, Ack>,
pub(crate) seqnum: u16,
}
#[derive(Debug)]
pub(crate) struct RudpShare<S: UdpSender> {
pub(crate) id: u16,
pub(crate) remote_id: RwLock<u16>,
pub(crate) chans: Vec<Mutex<Chan>>,
pub(crate) udp_tx: S,
pub(crate) close_tx: watch::Sender<bool>,
pub(crate) tasks: Mutex<JoinSet<()>>,
}
pub async fn new<S: UdpSender, R: UdpReceiver>(
id: u16,
remote_id: u16,
udp_tx: S,
udp_rx: R,
) -> io::Result<(RudpSender<S>, RudpReceiver<S>)> {
let (pkt_tx, pkt_rx) = mpsc::unbounded_channel();
let (close_tx, close_rx) = watch::channel(false);
let share = Arc::new(RudpShare {
id,
remote_id: RwLock::new(remote_id),
udp_tx,
close_tx,
chans: (0..NUM_CHANS)
.map(|_| {
Mutex::new(Chan {
acks: HashMap::new(),
seqnum: INIT_SEQNUM,
})
})
.collect(),
tasks: Mutex::new(JoinSet::new()),
});
let mut tasks = share.tasks.lock().await;
let recv_share = Arc::clone(&share);
let recv_close = close_rx.clone();
tasks
/*.build_task()
.name("recv")*/
.spawn(async move {
let worker = RecvWorker::new(udp_rx, recv_share, recv_close, pkt_tx);
worker.run().await;
});
let resend_share = Arc::clone(&share);
let mut resend_close = close_rx.clone();
tasks
/*.build_task()
.name("resend")*/
.spawn(async move {
ticker!(Duration::from_millis(500), resend_close, {
for chan in resend_share.chans.iter() {
for (_, ack) in chan.lock().await.acks.iter() {
resend_share.send_raw(&ack.data).await.ok(); // TODO: handle error (?)
}
}
});
});
let ping_share = Arc::clone(&share);
let mut ping_close = close_rx.clone();
tasks
/*.build_task()
.name("ping")*/
.spawn(async move {
ticker!(Duration::from_secs(PING_TIMEOUT), ping_close, {
ping_share
.send(
PktType::Ctl,
Pkt {
chan: 0,
unrel: false,
data: Cow::Borrowed(&[CtlType::Ping as u8]),
},
)
.await
.ok();
});
});
drop(tasks);
Ok((
RudpSender {
share: Arc::clone(&share),
},
RudpReceiver { share, pkt_rx },
))
}
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