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async-std/examples/udp-echo.rs

27 lines
616 B
Rust

5 years ago
//! UDP echo server.
//!
//! To send messages, do:
//!
//! ```sh
//! $ nc -u localhost 8080
//! ```
#![feature(async_await)]
use async_std::{io, net, task};
fn main() -> io::Result<()> {
task::block_on(async {
let socket = net::UdpSocket::bind("127.0.0.1:8080").await?;
let mut buf = vec![0u8; 1024];
println!("Listening on {}", socket.local_addr()?);
loop {
let (n, peer) = socket.recv_from(&mut buf).await?;
let sent = socket.send_to(&buf[..n], &peer).await?;
println!("Sent {} out of {} bytes to {}", sent, n, peer);
}
})
}