91 lines
3.0 KiB
Rust
91 lines
3.0 KiB
Rust
#![warn(rust_2018_idioms)]
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#![cfg(all(feature = "full", not(target_os = "wasi")))] // Wasi doesn't support multithreading
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use tokio::io::{self, AsyncReadExt, AsyncWriteExt};
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use tokio::net::{TcpListener, TcpStream};
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use tokio::sync::oneshot::channel;
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use tokio_test::assert_ok;
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#[tokio::test]
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async fn shutdown() {
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let srv = assert_ok!(TcpListener::bind("127.0.0.1:0").await);
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let addr = assert_ok!(srv.local_addr());
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let handle = tokio::spawn(async move {
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let mut stream = assert_ok!(TcpStream::connect(&addr).await);
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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let mut buf = [0u8; 1];
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let n = assert_ok!(stream.read(&mut buf).await);
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assert_eq!(n, 0);
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});
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let (mut stream, _) = assert_ok!(srv.accept().await);
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let (mut rd, mut wr) = stream.split();
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let n = assert_ok!(io::copy(&mut rd, &mut wr).await);
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assert_eq!(n, 0);
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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handle.await.unwrap()
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}
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#[tokio::test]
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#[cfg_attr(miri, ignore = "Miri doesn't support `SO_LINGER`")]
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async fn shutdown_after_tcp_reset() {
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let srv = assert_ok!(TcpListener::bind("127.0.0.1:0").await);
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let addr = assert_ok!(srv.local_addr());
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let (connected_tx, connected_rx) = channel();
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let (dropped_tx, dropped_rx) = channel();
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let handle = tokio::spawn(async move {
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let mut stream = assert_ok!(TcpStream::connect(&addr).await);
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connected_tx.send(()).unwrap();
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dropped_rx.await.unwrap();
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// After the peer's RST (linger = 0), `shutdown` returns `Ok(())` on most
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// platforms, but FreeBSD can surface the reset as `ConnectionReset` when
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// the kernel processed it before `shutdown` ran. Both are valid for an
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// already-reset connection.
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match AsyncWriteExt::shutdown(&mut stream).await {
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Ok(()) => {}
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Err(e) if e.kind() == io::ErrorKind::ConnectionReset => {}
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Err(e) => panic!("unexpected error after reset: {e:?}"),
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}
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});
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let (stream, _) = assert_ok!(srv.accept().await);
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// By setting linger to 0 we will trigger a TCP reset
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stream.set_zero_linger().unwrap();
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connected_rx.await.unwrap();
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drop(stream);
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dropped_tx.send(()).unwrap();
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handle.await.unwrap();
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}
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#[tokio::test]
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async fn shutdown_multiple_calls() {
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let srv = assert_ok!(TcpListener::bind("127.0.0.1:0").await);
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let addr = assert_ok!(srv.local_addr());
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let (connected_tx, connected_rx) = channel();
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let handle = tokio::spawn(async move {
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let mut stream = assert_ok!(TcpStream::connect(&addr).await);
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connected_tx.send(()).unwrap();
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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});
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let (mut stream, _) = assert_ok!(srv.accept().await);
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connected_rx.await.unwrap();
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assert_ok!(AsyncWriteExt::shutdown(&mut stream).await);
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handle.await.unwrap();
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}
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