handle unknown header on server

src/server.rs

@@ -102,6 +102,7 @@ async fn handle_request(
         stack = match (stack, n) {
             (0, b'\r') => 1,
             (1, b'\n') => {
+                if !status {
                     if key == b"Host" {
                         remote = String::from_utf8(value.clone())?;
                     } else if key == b"Authentication" {
@@ -111,11 +112,14 @@ async fn handle_request(
                         }
                     } else if key == b"UDP" {
                         udp = value == b"1";
+                    } else {
+                        return Err("unknown header provided!! malware connection".into());
                     }
                 
                     is_key = true;
                     key.clear();
                     value.clear();
+                }
                 2
             },
             (2, b'\r') => 3,