#![warn(rust_2018_idioms)] #![cfg(feature = "full")] use futures::future::poll_fn; use std::io; use std::sync::Arc; use tokio::{io::ReadBuf, net::UdpSocket}; const MSG: &[u8] = b"hello"; const MSG_LEN: usize = MSG.len(); #[tokio::test] async fn send_recv() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; sender.connect(receiver.local_addr()?).await?; receiver.connect(sender.local_addr()?).await?; sender.send(MSG).await?; let mut recv_buf = [0u8; 32]; let len = receiver.recv(&mut recv_buf[..]).await?; assert_eq!(&recv_buf[..len], MSG); Ok(()) } #[tokio::test] async fn send_recv_poll() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; sender.connect(receiver.local_addr()?).await?; receiver.connect(sender.local_addr()?).await?; poll_fn(|cx| sender.poll_send(cx, MSG)).await?; let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); let _len = poll_fn(|cx| receiver.poll_recv(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); Ok(()) } #[tokio::test] async fn send_to_recv_from() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; let receiver_addr = receiver.local_addr()?; sender.send_to(MSG, &receiver_addr).await?; let mut recv_buf = [0u8; 32]; let (len, addr) = receiver.recv_from(&mut recv_buf[..]).await?; assert_eq!(&recv_buf[..len], MSG); assert_eq!(addr, sender.local_addr()?); Ok(()) } #[tokio::test] async fn send_to_recv_from_poll() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; let receiver_addr = receiver.local_addr()?; poll_fn(|cx| sender.poll_send_to(cx, MSG, receiver_addr)).await?; let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); let addr = poll_fn(|cx| receiver.poll_recv_from(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); assert_eq!(addr, sender.local_addr()?); Ok(()) } #[tokio::test] async fn send_to_peek_from() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; let receiver_addr = receiver.local_addr()?; poll_fn(|cx| sender.poll_send_to(cx, MSG, receiver_addr)).await?; // peek let mut recv_buf = [0u8; 32]; let (n, addr) = receiver.peek_from(&mut recv_buf).await?; assert_eq!(&recv_buf[..n], MSG); assert_eq!(addr, sender.local_addr()?); // peek let mut recv_buf = [0u8; 32]; let (n, addr) = receiver.peek_from(&mut recv_buf).await?; assert_eq!(&recv_buf[..n], MSG); assert_eq!(addr, sender.local_addr()?); let mut recv_buf = [0u8; 32]; let (n, addr) = receiver.recv_from(&mut recv_buf).await?; assert_eq!(&recv_buf[..n], MSG); assert_eq!(addr, sender.local_addr()?); Ok(()) } #[tokio::test] async fn send_to_peek_from_poll() -> std::io::Result<()> { let sender = UdpSocket::bind("127.0.0.1:0").await?; let receiver = UdpSocket::bind("127.0.0.1:0").await?; let receiver_addr = receiver.local_addr()?; poll_fn(|cx| sender.poll_send_to(cx, MSG, receiver_addr)).await?; let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); let addr = poll_fn(|cx| receiver.poll_peek_from(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); assert_eq!(addr, sender.local_addr()?); let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); poll_fn(|cx| receiver.poll_peek_from(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); poll_fn(|cx| receiver.poll_recv_from(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); Ok(()) } #[tokio::test] async fn split() -> std::io::Result<()> { let socket = UdpSocket::bind("127.0.0.1:0").await?; let s = Arc::new(socket); let r = s.clone(); let addr = s.local_addr()?; tokio::spawn(async move { s.send_to(MSG, &addr).await.unwrap(); }); let mut recv_buf = [0u8; 32]; let (len, _) = r.recv_from(&mut recv_buf[..]).await?; assert_eq!(&recv_buf[..len], MSG); Ok(()) } #[tokio::test] async fn split_chan() -> std::io::Result<()> { // setup UdpSocket that will echo all sent items let socket = UdpSocket::bind("127.0.0.1:0").await?; let addr = socket.local_addr().unwrap(); let s = Arc::new(socket); let r = s.clone(); let (tx, mut rx) = tokio::sync::mpsc::channel::<(Vec, std::net::SocketAddr)>(1_000); tokio::spawn(async move { while let Some((bytes, addr)) = rx.recv().await { s.send_to(&bytes, &addr).await.unwrap(); } }); tokio::spawn(async move { let mut buf = [0u8; 32]; loop { let (len, addr) = r.recv_from(&mut buf).await.unwrap(); tx.send((buf[..len].to_vec(), addr)).await.unwrap(); } }); // test that we can send a value and get back some response let sender = UdpSocket::bind("127.0.0.1:0").await?; sender.send_to(MSG, addr).await?; let mut recv_buf = [0u8; 32]; let (len, _) = sender.recv_from(&mut recv_buf).await?; assert_eq!(&recv_buf[..len], MSG); Ok(()) } #[tokio::test] async fn split_chan_poll() -> std::io::Result<()> { // setup UdpSocket that will echo all sent items let socket = UdpSocket::bind("127.0.0.1:0").await?; let addr = socket.local_addr().unwrap(); let s = Arc::new(socket); let r = s.clone(); let (tx, mut rx) = tokio::sync::mpsc::channel::<(Vec, std::net::SocketAddr)>(1_000); tokio::spawn(async move { while let Some((bytes, addr)) = rx.recv().await { poll_fn(|cx| s.poll_send_to(cx, &bytes, addr)) .await .unwrap(); } }); tokio::spawn(async move { let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); loop { let addr = poll_fn(|cx| r.poll_recv_from(cx, &mut read)).await.unwrap(); tx.send((read.filled().to_vec(), addr)).await.unwrap(); } }); // test that we can send a value and get back some response let sender = UdpSocket::bind("127.0.0.1:0").await?; poll_fn(|cx| sender.poll_send_to(cx, MSG, addr)).await?; let mut recv_buf = [0u8; 32]; let mut read = ReadBuf::new(&mut recv_buf); let _ = poll_fn(|cx| sender.poll_recv_from(cx, &mut read)).await?; assert_eq!(read.filled(), MSG); Ok(()) } // # Note // // This test is purposely written such that each time `sender` sends data on // the socket, `receiver` awaits the data. On Unix, it would be okay waiting // until the end of the test to receive all the data. On Windows, this would // **not** be okay because it's resources are completion based (via IOCP). // If data is sent and not yet received, attempting to send more data will // result in `ErrorKind::WouldBlock` until the first operation completes. #[tokio::test] async fn try_send_spawn() { const MSG2: &[u8] = b"world!"; const MSG2_LEN: usize = MSG2.len(); let sender = UdpSocket::bind("127.0.0.1:0").await.unwrap(); let receiver = UdpSocket::bind("127.0.0.1:0").await.unwrap(); receiver .connect(sender.local_addr().unwrap()) .await .unwrap(); sender.writable().await.unwrap(); let sent = &sender .try_send_to(MSG, receiver.local_addr().unwrap()) .unwrap(); assert_eq!(sent, &MSG_LEN); let mut buf = [0u8; 32]; let mut received = receiver.recv(&mut buf[..]).await.unwrap(); sender .connect(receiver.local_addr().unwrap()) .await .unwrap(); let sent = &sender.try_send(MSG2).unwrap(); assert_eq!(sent, &MSG2_LEN); received += receiver.recv(&mut buf[..]).await.unwrap(); std::thread::spawn(move || { let sent = &sender.try_send(MSG).unwrap(); assert_eq!(sent, &MSG_LEN); }) .join() .unwrap(); received += receiver.recv(&mut buf[..]).await.unwrap(); assert_eq!(received, MSG_LEN * 2 + MSG2_LEN); } #[tokio::test] async fn try_send_recv() { // Create listener let server = UdpSocket::bind("127.0.0.1:0").await.unwrap(); // Create socket pair let client = UdpSocket::bind("127.0.0.1:0").await.unwrap(); // Connect the two client.connect(server.local_addr().unwrap()).await.unwrap(); server.connect(client.local_addr().unwrap()).await.unwrap(); for _ in 0..5 { loop { client.writable().await.unwrap(); match client.try_send(b"hello world") { Ok(n) => { assert_eq!(n, 11); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } loop { server.readable().await.unwrap(); let mut buf = [0; 512]; match server.try_recv(&mut buf) { Ok(n) => { assert_eq!(n, 11); assert_eq!(&buf[0..11], &b"hello world"[..]); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } } } #[tokio::test] async fn try_send_to_recv_from() { // Create listener let server = UdpSocket::bind("127.0.0.1:0").await.unwrap(); let saddr = server.local_addr().unwrap(); // Create socket pair let client = UdpSocket::bind("127.0.0.1:0").await.unwrap(); let caddr = client.local_addr().unwrap(); for _ in 0..5 { loop { client.writable().await.unwrap(); match client.try_send_to(b"hello world", saddr) { Ok(n) => { assert_eq!(n, 11); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } loop { server.readable().await.unwrap(); let mut buf = [0; 512]; match server.try_recv_from(&mut buf) { Ok((n, addr)) => { assert_eq!(n, 11); assert_eq!(addr, caddr); assert_eq!(&buf[0..11], &b"hello world"[..]); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } } } #[tokio::test] async fn try_recv_buf() { // Create listener let server = UdpSocket::bind("127.0.0.1:0").await.unwrap(); // Create socket pair let client = UdpSocket::bind("127.0.0.1:0").await.unwrap(); // Connect the two client.connect(server.local_addr().unwrap()).await.unwrap(); server.connect(client.local_addr().unwrap()).await.unwrap(); for _ in 0..5 { loop { client.writable().await.unwrap(); match client.try_send(b"hello world") { Ok(n) => { assert_eq!(n, 11); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } loop { server.readable().await.unwrap(); let mut buf = Vec::with_capacity(512); match server.try_recv_buf(&mut buf) { Ok(n) => { assert_eq!(n, 11); assert_eq!(&buf[0..11], &b"hello world"[..]); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } } } #[tokio::test] async fn try_recv_buf_from() { // Create listener let server = UdpSocket::bind("127.0.0.1:0").await.unwrap(); let saddr = server.local_addr().unwrap(); // Create socket pair let client = UdpSocket::bind("127.0.0.1:0").await.unwrap(); let caddr = client.local_addr().unwrap(); for _ in 0..5 { loop { client.writable().await.unwrap(); match client.try_send_to(b"hello world", saddr) { Ok(n) => { assert_eq!(n, 11); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } loop { server.readable().await.unwrap(); let mut buf = Vec::with_capacity(512); match server.try_recv_buf_from(&mut buf) { Ok((n, addr)) => { assert_eq!(n, 11); assert_eq!(addr, caddr); assert_eq!(&buf[0..11], &b"hello world"[..]); break; } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => continue, Err(e) => panic!("{:?}", e), } } } }