alighieri 0.4.0

//! Accepted client transport streams.
//!
//! SOCKS5 handling treats plaintext TCP and TLS-wrapped TCP identically, but
//! TCP relay splitting can keep a faster plaintext path when it knows which
//! transport it owns.

use std::pin::Pin;
use std::task::{Context, Poll};

use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
use tokio::net::TcpStream;
use tokio_rustls::server::TlsStream;

pub enum ClientStream {
    Tcp(TcpStream),
    Tls(Box<TlsStream<TcpStream>>),
}

impl AsyncRead for ClientStream {
    fn poll_read(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut ReadBuf<'_>,
    ) -> Poll<std::io::Result<()>> {
        match &mut *self {
            ClientStream::Tcp(stream) => Pin::new(stream).poll_read(cx, buf),
            ClientStream::Tls(stream) => Pin::new(stream.as_mut()).poll_read(cx, buf),
        }
    }
}

impl AsyncWrite for ClientStream {
    fn poll_write(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<std::io::Result<usize>> {
        match &mut *self {
            ClientStream::Tcp(stream) => Pin::new(stream).poll_write(cx, buf),
            ClientStream::Tls(stream) => Pin::new(stream.as_mut()).poll_write(cx, buf),
        }
    }

    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<std::io::Result<()>> {
        match &mut *self {
            ClientStream::Tcp(stream) => Pin::new(stream).poll_flush(cx),
            ClientStream::Tls(stream) => Pin::new(stream.as_mut()).poll_flush(cx),
        }
    }

    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<std::io::Result<()>> {
        match &mut *self {
            ClientStream::Tcp(stream) => Pin::new(stream).poll_shutdown(cx),
            ClientStream::Tls(stream) => Pin::new(stream.as_mut()).poll_shutdown(cx),
        }
    }
}