feat: finished exec command

sparse-beacon/src/tcp.rs

@@ -315,9 +315,14 @@ where
                     };
                     let (ref mut s_guard, ref mut d_guard, ref mut i_guard) = *guard;
 
+
                     if close_attempts > 0 {
                         let socket = s_guard.get_mut::<Socket>(tcp_handle);
-                        socket.close();
+                        if socket.is_open() {
+                            socket.close();
+                        } else {
+                            break;
+                        }
                     }
 
                     let timestamp = Instant::now();