1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126

use super::*;
use crate::common::IoSession;
use rustls::Session;

/// A wrapper around an underlying raw stream which implements the TLS or SSL
/// protocol.
#[derive(Debug)]
pub struct TlsStream<IO> {
    pub(crate) io: IO,
    pub(crate) session: ServerSession,
    pub(crate) state: TlsState,
}

impl<IO> TlsStream<IO> {
    #[inline]
    pub fn get_ref(&self) -> (&IO, &ServerSession) {
        (&self.io, &self.session)
    }

    #[inline]
    pub fn get_mut(&mut self) -> (&mut IO, &mut ServerSession) {
        (&mut self.io, &mut self.session)
    }

    #[inline]
    pub fn into_inner(self) -> (IO, ServerSession) {
        (self.io, self.session)
    }
}

impl<IO> IoSession for TlsStream<IO> {
    type Io = IO;
    type Session = ServerSession;

    #[inline]
    fn skip_handshake(&self) -> bool {
        false
    }

    #[inline]
    fn get_mut(&mut self) -> (&mut TlsState, &mut Self::Io, &mut Self::Session) {
        (&mut self.state, &mut self.io, &mut self.session)
    }

    #[inline]
    fn into_io(self) -> Self::Io {
        self.io
    }
}

impl<IO> AsyncRead for TlsStream<IO>
where
    IO: AsyncRead + AsyncWrite + Unpin,
{
    fn poll_read(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut ReadBuf<'_>,
    ) -> Poll<io::Result<()>> {
        let this = self.get_mut();
        let mut stream =
            Stream::new(&mut this.io, &mut this.session).set_eof(!this.state.readable());

        match &this.state {
            TlsState::Stream | TlsState::WriteShutdown => {
                let prev = buf.remaining();

                match stream.as_mut_pin().poll_read(cx, buf) {
                    Poll::Ready(Ok(())) => {
                        if prev == buf.remaining() {
                            this.state.shutdown_read();
                        }

                        Poll::Ready(Ok(()))
                    }
                    Poll::Ready(Err(ref err)) if err.kind() == io::ErrorKind::ConnectionAborted => {
                        this.state.shutdown_read();
                        Poll::Ready(Ok(()))
                    }
                    Poll::Ready(Err(e)) => Poll::Ready(Err(e)),
                    Poll::Pending => Poll::Pending,
                }
            }
            TlsState::ReadShutdown | TlsState::FullyShutdown => Poll::Ready(Ok(())),
            #[cfg(feature = "early-data")]
            s => unreachable!("server TLS can not hit this state: {:?}", s),
        }
    }
}

impl<IO> AsyncWrite for TlsStream<IO>
where
    IO: AsyncRead + AsyncWrite + Unpin,
{
    /// Note: that it does not guarantee the final data to be sent.
    /// To be cautious, you must manually call `flush`.
    fn poll_write(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<io::Result<usize>> {
        let this = self.get_mut();
        let mut stream =
            Stream::new(&mut this.io, &mut this.session).set_eof(!this.state.readable());
        stream.as_mut_pin().poll_write(cx, buf)
    }

    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
        let this = self.get_mut();
        let mut stream =
            Stream::new(&mut this.io, &mut this.session).set_eof(!this.state.readable());
        stream.as_mut_pin().poll_flush(cx)
    }

    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
        if self.state.writeable() {
            self.session.send_close_notify();
            self.state.shutdown_write();
        }

        let this = self.get_mut();
        let mut stream =
            Stream::new(&mut this.io, &mut this.session).set_eof(!this.state.readable());
        stream.as_mut_pin().poll_shutdown(cx)
    }
}