mirror of https://github.com/stjepang/smol
126 lines
3.4 KiB
Rust
126 lines
3.4 KiB
Rust
//! Uses the `uds_windows` crate to simulate Unix sockets on Windows.
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//!
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//! Run with:
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//!
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//! ```
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//! cargo run --example windows-uds
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//! ```
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#[cfg(windows)]
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fn main() -> std::io::Result<()> {
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use std::ops::Deref;
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use std::os::windows::io::{AsRawSocket, AsSocket, BorrowedSocket};
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use std::path::PathBuf;
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use smol::{future, prelude::*, Async, Unblock};
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use std::io;
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use tempfile::tempdir;
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// n.b.: notgull: uds_windows does not support I/O safety yet, hence the wrapper types
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struct UnixListener(uds_windows::UnixListener);
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impl From<uds_windows::UnixListener> for UnixListener {
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fn from(ul: uds_windows::UnixListener) -> Self {
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Self(ul)
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}
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}
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impl Deref for UnixListener {
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type Target = uds_windows::UnixListener;
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fn deref(&self) -> &uds_windows::UnixListener {
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&self.0
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}
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}
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impl AsSocket for UnixListener {
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fn as_socket(&self) -> BorrowedSocket<'_> {
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unsafe { BorrowedSocket::borrow_raw(self.as_raw_socket()) }
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}
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}
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struct UnixStream(uds_windows::UnixStream);
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impl From<uds_windows::UnixStream> for UnixStream {
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fn from(ul: uds_windows::UnixStream) -> Self {
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Self(ul)
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}
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}
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impl Deref for UnixStream {
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type Target = uds_windows::UnixStream;
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fn deref(&self) -> &uds_windows::UnixStream {
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&self.0
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}
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}
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impl AsSocket for UnixStream {
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fn as_socket(&self) -> BorrowedSocket<'_> {
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unsafe { BorrowedSocket::borrow_raw(self.as_raw_socket()) }
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}
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}
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impl io::Read for UnixStream {
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fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
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io::Read::read(&mut self.0, buf)
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}
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}
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impl io::Write for UnixStream {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
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io::Write::write(&mut self.0, buf)
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}
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fn flush(&mut self) -> io::Result<()> {
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io::Write::flush(&mut self.0)
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}
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}
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unsafe impl async_io::IoSafe for UnixStream {}
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async fn client(addr: PathBuf) -> io::Result<()> {
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// Connect to the address.
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let stream = Async::new(UnixStream::from(uds_windows::UnixStream::connect(addr)?))?;
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println!("Connected to {:?}", stream.get_ref().peer_addr()?);
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// Pipe the stream to stdout.
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let mut stdout = Unblock::new(std::io::stdout());
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futures_lite::io::copy(stream, &mut stdout).await?;
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Ok(())
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}
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let dir = tempdir()?;
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let path = dir.path().join("socket");
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future::block_on(async {
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// Create a listener.
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let listener = Async::new(UnixListener::from(uds_windows::UnixListener::bind(&path)?))?;
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println!("Listening on {:?}", listener.get_ref().local_addr()?);
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future::try_zip(
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async {
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// Accept the client.
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let (stream, _) = listener.read_with(|l| l.accept()).await?;
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println!("Accepted a client");
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// Send a message, drop the stream, and wait for the client.
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Async::new(UnixStream::from(stream))?
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.write_all(b"Hello!\n")
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.await?;
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Ok(())
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},
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client(path),
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)
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.await?;
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Ok(())
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})
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}
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#[cfg(not(windows))]
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fn main() {
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println!("This example works only on Windows!");
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}
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