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use std::{env, net::SocketAddr};
use tokio_uring::net::TcpListener;
fn main() {
let args: Vec<_> = env::args().collect();
let socket_addr = if args.len() <= 1 {
"127.0.0.1:0"
} else {
args[1].as_ref()
};
let socket_addr: SocketAddr = socket_addr.parse().unwrap();
tokio_uring::start(async {
let listener = TcpListener::bind(socket_addr).unwrap();
println!("Listening on {}", listener.local_addr().unwrap());
loop {
let (stream, socket_addr) = listener.accept().await.unwrap();
tokio_uring::spawn(async move {
// implement ping-pong loop
use tokio_uring::buf::BoundedBuf; // for slice()
println!("{} connected", socket_addr);
let mut n = 0;
let mut buf = vec![0u8; 4096];
loop {
let (result, nbuf) = stream.read(buf).await;
buf = nbuf;
let read = result.unwrap();
if read == 0 {
println!("{} closed, {} total ping-ponged", socket_addr, n);
break;
}
let (res, slice) = stream.write_all(buf.slice(..read)).await;
res.unwrap();
buf = slice.into_inner();
println!("{} all {} bytes ping-ponged", socket_addr, read);
n += read;
}
});
}
});
}
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