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proxy: introduce Acceptor and Connector traits
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,221 @@ | ||
| use std::future::{poll_fn, Future}; | ||
| use std::io; | ||
| use std::net::SocketAddr; | ||
| use std::pin::Pin; | ||
| use std::task::{Context, Poll}; | ||
|
|
||
| use tokio::net::{TcpListener, TcpStream, ToSocketAddrs}; | ||
|
|
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| pub trait Acceptor { | ||
| type Connection: AsyncRead + AsyncWrite + Send + Unpin + 'static; | ||
| type Error: std::error::Error + Send + Sync + 'static; | ||
|
|
||
| #[inline] | ||
| fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> { | ||
| let _ = cx; | ||
| Poll::Ready(Ok(())) | ||
| } | ||
|
|
||
| fn accept( | ||
| &self, | ||
| ) -> impl Future<Output = Result<(Self::Connection, SocketAddr), Self::Error>> + Send; | ||
| } | ||
|
|
||
| pub trait Connector { | ||
| type Connection: AsyncRead + AsyncWrite + Send + Unpin + 'static; | ||
| type Error: std::error::Error + Send + Sync + 'static; | ||
|
|
||
| #[inline] | ||
| fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> { | ||
| let _ = cx; | ||
| Poll::Ready(Ok(())) | ||
| } | ||
|
|
||
| fn connect( | ||
| &self, | ||
| addr: SocketAddr, | ||
| ) -> impl Future<Output = Result<Self::Connection, Self::Error>> + Send; | ||
| } | ||
|
|
||
| pub struct TokioTcpAcceptor { | ||
| listener: TcpListener, | ||
| tcp_nodelay: Option<bool>, | ||
| tcp_keepalive: Option<bool>, | ||
| } | ||
|
|
||
| impl TokioTcpAcceptor { | ||
| pub async fn bind<A: ToSocketAddrs>(addr: A) -> io::Result<Self> { | ||
| let listener = TcpListener::bind(addr).await?; | ||
| // When set for the server socket, the keepalive setting | ||
| // will be inherited by all accepted client sockets. | ||
| socket2::SockRef::from(&listener).set_keepalive(true)?; | ||
| Ok(Self { | ||
| listener, | ||
| tcp_nodelay: Some(true), | ||
| tcp_keepalive: None, | ||
| }) | ||
| } | ||
|
|
||
| pub fn into_std(self) -> io::Result<std::net::TcpListener> { | ||
| self.listener.into_std() | ||
| } | ||
| } | ||
|
|
||
| impl Acceptor for TokioTcpAcceptor { | ||
| type Connection = TcpStream; | ||
| type Error = io::Error; | ||
|
|
||
| fn accept(&self) -> impl Future<Output = Result<(Self::Connection, SocketAddr), Self::Error>> { | ||
| async move { | ||
| let (stream, addr) = self.listener.accept().await?; | ||
|
|
||
| let socket = socket2::SockRef::from(&stream); | ||
| if let Some(nodelay) = self.tcp_nodelay { | ||
| socket.set_nodelay(nodelay)?; | ||
| } | ||
| if let Some(keepalive) = self.tcp_keepalive { | ||
| socket.set_keepalive(keepalive)?; | ||
| } | ||
|
|
||
| Ok((stream, addr)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub struct TokioTcpConnector; | ||
|
|
||
| impl Connector for TokioTcpConnector { | ||
| type Connection = TcpStream; | ||
| type Error = io::Error; | ||
|
|
||
| fn connect( | ||
| &self, | ||
| addr: SocketAddr, | ||
| ) -> impl Future<Output = Result<Self::Connection, Self::Error>> { | ||
| async move { | ||
| let socket = TcpStream::connect(addr).await?; | ||
| socket.set_nodelay(true)?; | ||
| Ok(socket) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub trait Stream: AsyncRead + AsyncWrite + Send + Unpin + 'static {} | ||
|
|
||
| impl<T: AsyncRead + AsyncWrite + Send + Unpin + 'static> Stream for T {} | ||
|
|
||
| pub trait AsyncRead { | ||
| fn readable(&self) -> impl Future<Output = io::Result<()>> + Send | ||
| where | ||
| Self: Send + Sync, | ||
| { | ||
| poll_fn(move |cx| self.poll_read_ready(cx)) | ||
| } | ||
|
|
||
| fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<()>>; | ||
|
|
||
| fn poll_read( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| buf: &mut [u8], | ||
| ) -> Poll<io::Result<usize>>; | ||
|
|
||
| fn poll_read_vectored( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| bufs: &mut [io::IoSliceMut<'_>], | ||
| ) -> Poll<io::Result<usize>>; | ||
| } | ||
|
|
||
| pub trait AsyncWrite { | ||
| fn writable(&self) -> impl Future<Output = io::Result<()>> + Send | ||
| where | ||
| Self: Send + Sync, | ||
| { | ||
| poll_fn(move |cx| self.poll_write_ready(cx)) | ||
| } | ||
|
|
||
| fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<()>>; | ||
|
|
||
| fn poll_write( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| buf: &[u8], | ||
| ) -> Poll<io::Result<usize>>; | ||
|
|
||
| fn poll_write_vectored( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| bufs: &[io::IoSlice<'_>], | ||
| ) -> Poll<io::Result<usize>>; | ||
|
|
||
| fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>>; | ||
|
|
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| fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>>; | ||
| } | ||
|
|
||
| impl AsyncRead for tokio::net::TcpStream { | ||
| fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<()>> { | ||
| tokio::net::TcpStream::poll_read_ready(self, cx) | ||
| } | ||
|
|
||
| fn poll_read( | ||
| mut self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| buf: &mut [u8], | ||
| ) -> Poll<io::Result<usize>> { | ||
| match tokio::net::TcpStream::try_read(Pin::new(&mut *self).get_mut(), buf) { | ||
| Ok(n) => Poll::Ready(Ok(n)), | ||
| Err(e) if e.kind() == io::ErrorKind::WouldBlock => { | ||
| cx.waker().wake_by_ref(); | ||
| Poll::Pending | ||
| } | ||
| Err(e) => Poll::Ready(Err(e)), | ||
| } | ||
| } | ||
|
|
||
| fn poll_read_vectored( | ||
| mut self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| bufs: &mut [io::IoSliceMut<'_>], | ||
| ) -> Poll<io::Result<usize>> { | ||
| match tokio::net::TcpStream::try_read_vectored(Pin::new(&mut *self).get_mut(), bufs) { | ||
| Ok(n) => Poll::Ready(Ok(n)), | ||
| Err(e) if e.kind() == io::ErrorKind::WouldBlock => { | ||
| cx.waker().wake_by_ref(); | ||
| Poll::Pending | ||
| } | ||
| Err(e) => Poll::Ready(Err(e)), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl AsyncWrite for tokio::net::TcpStream { | ||
| fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<()>> { | ||
| tokio::net::TcpStream::poll_write_ready(self, cx) | ||
| } | ||
|
|
||
| fn poll_write( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| buf: &[u8], | ||
| ) -> Poll<io::Result<usize>> { | ||
| <Self as tokio::io::AsyncWrite>::poll_write(self, cx, buf) | ||
| } | ||
|
|
||
| fn poll_write_vectored( | ||
| self: Pin<&mut Self>, | ||
| cx: &mut Context<'_>, | ||
| bufs: &[io::IoSlice<'_>], | ||
| ) -> Poll<io::Result<usize>> { | ||
| <Self as tokio::io::AsyncWrite>::poll_write_vectored(self, cx, bufs) | ||
| } | ||
|
|
||
| fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> { | ||
| <Self as tokio::io::AsyncWrite>::poll_flush(self, cx) | ||
| } | ||
|
|
||
| fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> { | ||
| <Self as tokio::io::AsyncWrite>::poll_shutdown(self, cx) | ||
| } | ||
| } |
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