Do not print instructions for admin UI when telnet is already running

Author: untitaker

installer/src/tplink.rs

@@ -295,6 +295,13 @@ async fn handler(state: State<AppState>, mut req: Request) -> Result<Response, S
 }
 
 async fn tplink_launch_telnet_v5(admin_ip: &str) -> Result<(), Error> {
+    let addr = SocketAddr::from_str(&format!("{admin_ip}:23")).unwrap();
+
+    if telnet_send_command(addr, "true", "exit code 0", true).await.is_ok() {
+        println!("telnet already appears to be running");
+        return Ok(());
+    }
+
     let client: HttpProxyClient =
         hyper_util::client::legacy::Client::<(), ()>::builder(TokioExecutor::new())
             .build(HttpConnector::new());
@@ -316,8 +323,6 @@ async fn tplink_launch_telnet_v5(admin_ip: &str) -> Result<(), Error> {
 
     let handle = tokio::spawn(async move { axum::serve(listener, app).await });
 
-    let addr = SocketAddr::from_str(&format!("{admin_ip}:23")).unwrap();
-
     while telnet_send_command(addr, "true", "exit code 0", true)
         .await
         .is_err()