diff --git a/src/lib.rs b/src/lib.rs
index d22971b..3798ba4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -21,12 +21,20 @@ use sdlan_sn_rs::{
     utils::{create_or_load_uuid, get_sdlan_sock_from_socketaddr, Result, SDLanError},
 };
 
+#[derive(Clone)]
+#[repr(u8)]
+pub enum ConnectionState {
+    NotConnected = 0,
+    Connecting = 1,
+    Connected = 2,
+}
+
 pub async fn run_sdlan(
     args: CommandLine,
     sender: std::sync::mpsc::Sender<bool>,
     install_channel: &str,
 
-    connecting_chan: Option<Sender<bool>>
+    connecting_chan: Option<Sender<ConnectionState>>
     // start_stop_sender: Sender<String>,
     // start_stop_receiver: Receiver<String>,
 ) -> Result<()> {
diff --git a/src/network/async_main.rs b/src/network/async_main.rs
index f3f5143..535c5ec 100644
--- a/src/network/async_main.rs
+++ b/src/network/async_main.rs
@@ -10,6 +10,7 @@ use crate::pb::{
 };
 use crate::tcp::{init_tcp_conn, EventType, NakMsgCode, PacketType, SdlanTcp};
 use crate::utils::{send_to_sock, CommandLine};
+use crate::ConnectionState;
 use etherparse::IpHeaders;
 use sdlan_sn_rs::config::{AF_INET, SDLAN_DEFAULT_TTL};
 use sdlan_sn_rs::peer::SdlanSock;
@@ -213,7 +214,7 @@ pub async fn async_main(
     args: CommandLine,
     start_stop_chan: Receiver<StartStopInfo>,
     cancel: CancellationToken,
-    connecting_chan: Option<Sender<bool>>,
+    connecting_chan: Option<Sender<ConnectionState>>,
 ) -> Result<()> {
     // let _ = PidRecorder::new(".pid");
 
diff --git a/src/tcp/tcp_conn.rs b/src/tcp/tcp_conn.rs
index e21503f..c9b2492 100644
--- a/src/tcp/tcp_conn.rs
+++ b/src/tcp/tcp_conn.rs
@@ -22,6 +22,7 @@ use tracing::error;
 use crate::config::TCP_PING_TIME;
 use crate::network::StartStopInfo;
 use crate::tcp::read_a_packet;
+use crate::ConnectionState;
 
 use super::tcp_codec::SdlanTcp;
 
@@ -36,7 +37,7 @@ pub struct ReadWriteActor {
     // actor收到数据之后，发送给上层的发送端口,接收端由handle保存
     from_tcp: Sender<SdlanTcp>,
     cancel: CancellationToken,
-    connecting_chan: Option<Sender<bool>>,
+    connecting_chan: Option<Sender<ConnectionState>>,
 }
 
 impl ReadWriteActor {
@@ -46,7 +47,7 @@ impl ReadWriteActor {
         from_tcp: Sender<SdlanTcp>,
         connected: Arc<AtomicBool>,
         pong_time: Arc<AtomicU64>,
-        connecting_chan: Option<Sender<bool>>,
+        connecting_chan: Option<Sender<ConnectionState>>,
     ) -> Self {
         Self {
             // to_tcp,
@@ -76,6 +77,9 @@ impl ReadWriteActor {
         let mut started = false;
         let mut start_pkt_id = None;
         loop {
+            if let Some(ref connecting_chan) = self.connecting_chan {
+                let _ = connecting_chan.send(ConnectionState::NotConnected).await;
+            }
             self.connected.store(false, Ordering::Relaxed);
             if !started {
                 // println!("waiting for start");
@@ -108,10 +112,11 @@ impl ReadWriteActor {
                 debug!("start stop chan recv none");
                 continue;
             }
-            debug!("try connecting...");
+
             if let Some(ref connecting_chan) = self.connecting_chan {
-                let _ = connecting_chan.send(true).await;
+                let _ = connecting_chan.send(ConnectionState::Connecting).await;
             }
+            debug!("try connecting...");
             let Ok(mut stream) = TcpStream::connect(&self.remote).await else {
                 self.connected.store(false, Ordering::Relaxed);
                 if keep_reconnect {
@@ -131,7 +136,7 @@ impl ReadWriteActor {
             on_connected(&mut stream, start_pkt_id.take()).await;
 
             if let Some(ref connecting_chan) = self.connecting_chan {
-                let _ = connecting_chan.send(false).await;
+                let _ = connecting_chan.send(ConnectionState::Connected).await;
             }
             // stream.write("hello".as_bytes()).await;
             let (reader, mut write) = stream.into_split();
@@ -251,7 +256,7 @@ impl ReadWriterHandle {
         pong_time: Arc<AtomicU64>,
         start_stop_chan: Receiver<StartStopInfo>,
         // cancel: CancellationToken,
-        connecting_chan: Option<Sender<bool>>,
+        connecting_chan: Option<Sender<ConnectionState>>,
     ) -> Self
     where
         T: for<'b> Fn(&'b mut TcpStream, Option<u32>) -> BoxFuture<'b, ()> + Send + 'static,
@@ -298,7 +303,7 @@ pub fn init_tcp_conn<'a, T, T3, T2, F, F2>(
     pong_time: Arc<AtomicU64>,
     // cancel: CancellationToken,
     start_stop_chan: Receiver<StartStopInfo>,
-    connecting_chan: Option<Sender<bool>>
+    connecting_chan: Option<Sender<ConnectionState>>
 ) where
     T: for<'b> Fn(&'b mut TcpStream, Option<u32>) -> BoxFuture<'b, ()> + Send + 'static,
     T3: Fn() -> F2 + Send + 'static,