[pve-devel] [PATCH proxmox 2/2] websocket: adapt for client connection

[Fabian Grünbichler]

previously, this was only used for the server side handling of web
sockets. by making the mask part of the WebSocket struct and making some
of the fns associated, we can re-use this for client-side connections
such as in proxmox-websocket-tunnel.

Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
---
 proxmox/src/tools/websocket.rs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/proxmox/src/tools/websocket.rs b/proxmox/src/tools/websocket.rs
index 8685aab..e3a559b 100644
--- a/proxmox/src/tools/websocket.rs
+++ b/proxmox/src/tools/websocket.rs
@@ -659,6 +659,7 @@ pub const MAGIC_WEBSOCKET_GUID: &str = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 /// Provides methods for connecting a WebSocket endpoint with another
 pub struct WebSocket {
     pub text: bool,
+    pub mask: Option<[u8; 4]>,
 }
 
 impl WebSocket {
@@ -710,10 +711,13 @@ impl WebSocket {
             .header(SEC_WEBSOCKET_PROTOCOL, ws_proto)
             .body(Body::empty())?;
 
-        Ok((Self { text }, response))
+        let mask = None;
+
+        Ok((Self { text, mask }, response))
     }
 
-    async fn handle_channel_message<W>(
+    pub async fn handle_channel_message<W>(
+        &self,
         result: WebSocketReadResult,
         writer: &mut WebSocketWriter<W>,
     ) -> Result<OpCode, Error>
@@ -722,11 +726,11 @@ impl WebSocket {
     {
         match result {
             Ok((OpCode::Ping, msg)) => {
-                writer.send_control_frame(None, OpCode::Pong, &msg).await?;
+                writer.send_control_frame(self.mask, OpCode::Pong, &msg).await?;
                 Ok(OpCode::Pong)
             }
             Ok((OpCode::Close, msg)) => {
-                writer.send_control_frame(None, OpCode::Close, &msg).await?;
+                writer.send_control_frame(self.mask, OpCode::Close, &msg).await?;
                 Ok(OpCode::Close)
             }
             Ok((opcode, _)) => {
@@ -735,7 +739,7 @@ impl WebSocket {
             }
             Err(err) => {
                 writer
-                    .send_control_frame(None, OpCode::Close, &err.generate_frame_payload())
+                    .send_control_frame(self.mask, OpCode::Close, &err.generate_frame_payload())
                     .await?;
                 Err(Error::from(err))
             }
@@ -743,6 +747,7 @@ impl WebSocket {
     }
 
     async fn copy_to_websocket<R, W>(
+        &self,
         mut reader: &mut R,
         mut writer: &mut WebSocketWriter<W>,
         receiver: &mut mpsc::UnboundedReceiver<WebSocketReadResult>,
@@ -759,7 +764,7 @@ impl WebSocket {
                     res = buf.read_from_async(&mut reader).fuse() => res?,
                     res = receiver.recv().fuse() => {
                         let res = res.ok_or_else(|| format_err!("control channel closed"))?;
-                        match Self::handle_channel_message(res, &mut writer).await? {
+                        match self.handle_channel_message(res, &mut writer).await? {
                             OpCode::Close => return Ok(true),
                             _ => { continue; },
                         }
@@ -799,10 +804,10 @@ impl WebSocket {
 
         let (tx, mut rx) = mpsc::unbounded_channel();
         let mut wsreader = WebSocketReader::new(usreader, tx);
-        let mut wswriter = WebSocketWriter::new(None, self.text, uswriter);
+        let mut wswriter = WebSocketWriter::new(self.mask, self.text, uswriter);
 
         let ws_future = tokio::io::copy(&mut wsreader, &mut dswriter);
-        let term_future = Self::copy_to_websocket(&mut dsreader, &mut wswriter, &mut rx);
+        let term_future = self.copy_to_websocket(&mut dsreader, &mut wswriter, &mut rx);
 
         let res = select! {
             res = ws_future.fuse() => match res {
@@ -812,7 +817,7 @@ impl WebSocket {
             res = term_future.fuse() => match res {
                 Ok(sent_close) if !sent_close => {
                     // status code 1000 => 0x03E8
-                    wswriter.send_control_frame(None, OpCode::Close, &WebSocketErrorKind::Normal.to_be_bytes()).await?;
+                    wswriter.send_control_frame(self.mask, OpCode::Close, &WebSocketErrorKind::Normal.to_be_bytes()).await?;
                     Ok(())
                 }
                 Ok(_) => Ok(()),
-- 
2.20.1