fix compilation

src/capture.rs

@@ -1,6 +1,5 @@
 use std::{
     cell::Cell,
-    future,
     time::{Duration, Instant},
 };
 

src/connect.rs

@@ -211,7 +211,7 @@ async fn receive_loop(
     let mut buf = [0u8; MAX_EVENT_SIZE];
     while let Ok(_) = conn.recv(&mut buf).await {
         if let Ok(event) = buf.try_into() {
-            tx.send((handle, event));
+            tx.send((handle, event)).expect("channel closed");
         }
     }
 }

src/server.rs

@@ -92,6 +92,7 @@ impl Server {
         let config = Rc::new(config);
 
         Self {
+            active: Rc::new(Cell::new(None)),
             config,
             client_manager,
             port,