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#![warn(rust_2018_idioms)]
#![cfg(feature = "full")]
#![cfg(unix)]
use tokio::net::UnixDatagram;
use tokio::try_join;
use std::io;
use std::sync::Arc;
async fn echo_server(socket: UnixDatagram) -> io::Result<()> {
let mut recv_buf = vec![0u8; 1024];
loop {
let (len, peer_addr) = socket.recv_from(&mut recv_buf[..]).await?;
if let Some(path) = peer_addr.as_pathname() {
socket.send_to(&recv_buf[..len], path).await?;
}
}
}
#[tokio::test]
async fn echo() -> io::Result<()> {
let dir = tempfile::tempdir().unwrap();
let server_path = dir.path().join("server.sock");
let client_path = dir.path().join("client.sock");
let server_socket = UnixDatagram::bind(server_path.clone())?;
tokio::spawn(async move {
if let Err(e) = echo_server(server_socket).await {
eprintln!("Error in echo server: {}", e);
}
});
{
let socket = UnixDatagram::bind(&client_path).unwrap();
socket.connect(server_path)?;
socket.send(b"ECHO").await?;
let mut recv_buf = [0u8; 16];
let len = socket.recv(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], b"ECHO");
}
Ok(())
}
#[tokio::test]
async fn echo_from() -> io::Result<()> {
let dir = tempfile::tempdir().unwrap();
let server_path = dir.path().join("server.sock");
let client_path = dir.path().join("client.sock");
let server_socket = UnixDatagram::bind(server_path.clone())?;
tokio::spawn(async move {
if let Err(e) = echo_server(server_socket).await {
eprintln!("Error in echo server: {}", e);
}
});
{
let socket = UnixDatagram::bind(&client_path).unwrap();
socket.connect(&server_path)?;
socket.send(b"ECHO").await?;
let mut recv_buf = [0u8; 16];
let (len, addr) = socket.recv_from(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], b"ECHO");
assert_eq!(addr.as_pathname(), Some(server_path.as_path()));
}
Ok(())
}
// Even though we use sync non-blocking io we still need a reactor.
#[tokio::test]
async fn try_send_recv_never_block() -> io::Result<()> {
let mut recv_buf = [0u8; 16];
let payload = b"PAYLOAD";
let mut count = 0;
let (dgram1, dgram2) = UnixDatagram::pair()?;
// Send until we hit the OS `net.unix.max_dgram_qlen`.
loop {
match dgram1.try_send(payload) {
Err(err) => match err.kind() {
io::ErrorKind::WouldBlock | io::ErrorKind::Other => break,
_ => unreachable!("unexpected error {:?}", err),
},
Ok(len) => {
assert_eq!(len, payload.len());
}
}
count += 1;
}
// Read every dgram we sent.
while count > 0 {
let len = dgram2.try_recv(&mut recv_buf[..])?;
assert_eq!(len, payload.len());
assert_eq!(payload, &recv_buf[..len]);
count -= 1;
}
let err = dgram2.try_recv(&mut recv_buf[..]).unwrap_err();
match err.kind() {
io::ErrorKind::WouldBlock => (),
_ => unreachable!("unexpected error {:?}", err),
}
Ok(())
}
#[tokio::test]
async fn split() -> std::io::Result<()> {
let dir = tempfile::tempdir().unwrap();
let path = dir.path().join("split.sock");
let s = Arc::new(UnixDatagram::bind(path.clone())?);
let r = s.clone();
let msg = b"hello";
let ((), ()) = try_join! {
async {
s.send_to(msg, path).await?;
io::Result::Ok(())
},
async {
let mut recv_buf = [0u8; 32];
let (len, _) = r.recv_from(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], msg);
Ok(())
},
}?;
Ok(())
}
|
