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46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
//! TCP echo server, accepting connections both on both ipv4 and ipv6 sockets.
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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 127.0.0.1 8080
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//! $ nc ::1 8080
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//! ```
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use async_std::io;
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use async_std::net::{TcpListener, TcpStream};
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use async_std::prelude::*;
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use async_std::task;
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async fn process(stream: TcpStream) -> io::Result<()> {
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println!("Accepted from: {}", stream.peer_addr()?);
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let mut reader = stream.clone();
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let mut writer = stream;
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io::copy(&mut reader, &mut writer).await?;
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Ok(())
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}
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fn main() -> io::Result<()> {
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task::block_on(async {
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let ipv4_listener = TcpListener::bind("127.0.0.1:8080").await?;
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println!("Listening on {}", ipv4_listener.local_addr()?);
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let ipv6_listener = TcpListener::bind("[::1]:8080").await?;
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println!("Listening on {}", ipv6_listener.local_addr()?);
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let ipv4_incoming = ipv4_listener.incoming();
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let ipv6_incoming = ipv6_listener.incoming();
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let mut incoming = ipv4_incoming.merge(ipv6_incoming);
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while let Some(stream) = incoming.next().await {
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let stream = stream?;
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task::spawn(async {
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process(stream).await.unwrap();
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});
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}
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Ok(())
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})
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}
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