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