diff --git a/src/network/node.rs b/src/network/node.rs
index 867e4ec..f968039 100755
--- a/src/network/node.rs
+++ b/src/network/node.rs
@@ -236,10 +236,10 @@ pub struct Node {
     nat_type: Mutex<NatType>,
 
     nat_cookie: AtomicU32,
-    // cookie_match: DashMap<u32, oneshot::Sender<SdlStunProbeReply>>,
+
+    //cookie_match: DashMap<u32, oneshot::Sender<SdlStunProbeReply>>,
     cookie_match: Queryer,
 
-    // packet_id_match: Queryer,
     // packet_id_match: DashMap<u32, oneshot::Sender<RegisterSuperFeedback>>,
 }
 
@@ -247,18 +247,7 @@ unsafe impl Sync for Node {}
 
 impl Node {
     pub fn send_register_super_feedback(&self, pktid: u32, feed: RegisterSuperFeedback) {
-        // self.packet_id_match.write_feedback(pktid, feed);
         self.cookie_match.write_feedback(pktid, feed);
-        /* 
-        match self.packet_id_match.remove(&pktid) {
-            Some(sender) => {
-                let _ = sender.1.send(feed);
-            }
-            None => {
-                return;
-            }
-        }
-        */
     }
 
     pub fn get_nat_type(&self) -> NatType {
@@ -336,9 +325,8 @@ impl Node {
         // *self.network_code.lock().unwrap() = network_code;
         let id = self.get_next_packet_id();
 
-        // let result = self.packet_id_match.do_action_and_wait_for(
-        let result = self.cookie_match.do_action_and_wait_for(
-            id,
+        let res = self.cookie_match.do_action_and_wait_for(
+            id, 
             || async {
                 let _ = self
                     .start_stop_sender
@@ -348,40 +336,15 @@ impl Node {
                     })
                     .await;
                 debug!("start with feedback");
-            }, 
+            },
             timeout
         ).await?;
 
-        if let Ok(data) = result.downcast() {
-            return Ok(*data);
+        if let Ok(res) = res.downcast() {
+            Ok(*res)
+        } else {
+            Err(SDLanError::ConvertError("failed to convert feedback to RSFeedback".to_owned()))
         }
-        Err(SDLanError::NormalError("timed out"))
-        /* 
-        let (tx, rx) = oneshot::channel();
-        self.packet_id_match.insert(id, tx);
-        let _ = self
-            .start_stop_sender
-            .send(StartStopInfo {
-                is_start: true,
-                pkt_id: Some(id),
-            })
-            .await;
-        debug!("start with feedback");
-
-        tokio::select! {
-            rx_info = rx => {
-                if let Ok(result) = rx_info {
-                    self.packet_id_match.remove(&id);
-                    Ok(result)
-                } else {
-                    Err(SDLanError::NormalError("rx closed"))
-                }
-            }
-            _ = tokio::time::sleep(timeout) => {
-                Err(SDLanError::NormalError("timed out"))
-            }
-        }
-        */
     }
 
     pub async fn stop(&self) {
@@ -485,7 +448,7 @@ impl Node {
             stats: NodeStats::new(),
             _last_register_req: AtomicU64::new(0),
 
-            // packet_id_match: Queryer::new(),
+            // packet_id_match: DashMap::new(),
             nat_cookie: AtomicU32::new(1),
             cookie_match: Queryer::new(),
             server_ip,
@@ -570,13 +533,6 @@ impl Node {
 
     pub async fn send_nat_probe_reply(&self, cookie: u32, buf: SdlStunProbeReply) {
         self.cookie_match.write_feedback(cookie, buf);
-        /* 
-        if let Some((_key, chan)) = self.cookie_match.remove(&cookie) {
-            let _ = chan.send(buf);
-            return;
-        }
-        */
-        // error!("failed to get such cookie stun probe");
     }
 
     pub async fn probe_nat_type(&self) -> NatType {
@@ -654,30 +610,19 @@ impl Node {
         to_server: &SocketAddr,
     ) -> Result<SdlStunProbeReply> {
         let cookie = self.nat_cookie.fetch_add(1, Ordering::Relaxed);
-        // println!("==> sending probe request: {:?}", probe);
+        let probe = SdlStunProbe {
+            attr: msgattr as u32,
+            cookie,
+            step: 0,
+        };
 
-        let res = self.cookie_match.do_action_and_wait_for(
-            cookie, 
-            || async {
-                let probe = SdlStunProbe {
-                    attr: msgattr as u32,
-                    cookie,
-                    step: 0,
-                };
-                let msg = encode_to_udp_message(Some(probe), PacketType::StunProbe as u8).unwrap();
-                if let Err(_e) = self.udp_sock_v4.send_to(&msg, to_server).await {
-                    error!("failed to send StunProbe");
-                }
-            },
-            Duration::from_secs(3),
-        ).await?;
-        if let Ok(data) = res.downcast() {
-            return Ok(*data);
+        let result = self.cookie_match.send_message_to_udp_and_wait_for(&self.udp_sock_v4, cookie, probe, PacketType::StunProbe as u8, to_server, Duration::from_secs(3)).await?;
+
+        if let Ok(res) = result.downcast() {
+            return Ok(*res);
         }
-
-
-        Err(SDLanError::NormalError("reply recv error"))
-                // step 1 received
+        return Err(SDLanError::ConvertError("failed to convert to StunprobeReply".to_owned()))
+        // println!("==> sending probe request: {:?}", probe);
     }
 }
 
@@ -893,9 +838,6 @@ impl Queryer {
             return Err(SDLanError::NormalError("send error"));
         }
 
-        let quic_conn = get_quic_write_conn();
-        quic_conn.send(content).await?;
-
         tokio::select! {
             data = rx => {
                 if let Ok(data) = data {