Add peek

src/lib.rs

@@ -146,6 +146,20 @@ where
         future::poll_fn(|cx| self.as_mut().poll_do_handshake(cx)).await
     }
 
+    /// Like [`SslStream::ssl_peek`](ssl::SslStream::ssl_peek).
+    pub fn poll_peek(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut [u8],
+    ) -> Poll<Result<usize, ssl::Error>> {
+        self.with_context(cx, |s| cvt_ossl(s.ssl_peek(buf)))
+    }
+
+    /// A convenience method wrapping [`poll_peek`](Self::poll_peek).
+    pub async fn peek(mut self: Pin<&mut Self>, buf: &mut [u8]) -> Result<usize, ssl::Error> {
+        future::poll_fn(|cx| self.as_mut().poll_peek(cx, buf)).await
+    }
+
     /// Like [`SslStream::read_early_data`](ssl::SslStream::read_early_data).
     #[cfg(ossl111)]
     pub fn poll_read_early_data(