Highlight port in red if tunnel failed to open

src/tunnel/mod.rs

@@ -40,7 +40,12 @@ impl TunnelInner {
                 &self.internal_address,
                 self.port,
             )
-            .await?;
+            .await
+            .inspect_err(|_| {
+                self.stats.set_failed(true);
+            })?;
+
+        self.stats.set_failed(false);
 
         Ok(TrackStats::new(channel.into_stream(), self.stats.clone()))
     }

src/tunnel/tui.rs

@@ -17,9 +17,15 @@ pub struct TunnelRow {
 
 impl From<&TunnelRow> for Vec<Span<'static>> {
     fn from(row: &TunnelRow) -> Self {
+        let port = if row.stats.failed() {
+            row.port.clone().red()
+        } else {
+            row.port.clone()
+        };
+
         vec![
             row.name.clone(),
-            row.port.clone(),
+            port,
             row.access.clone(),
             row.address.clone(),
             row.stats.connections().to_string().into(),