diff --git a/vnt-jni/java/top/wherewego/vnt/jni/CallBack.java b/vnt-jni/java/top/wherewego/vnt/jni/CallBack.java
index fa06fe9..305e8a2 100644
--- a/vnt-jni/java/top/wherewego/vnt/jni/CallBack.java
+++ b/vnt-jni/java/top/wherewego/vnt/jni/CallBack.java
@@ -8,6 +8,10 @@ import top.wherewego.vnt.jni.param.*;
  * @author https://github.com/lbl8603/vnt
  */
 public interface CallBack {
+    /**
+     * 连接成功的回调
+     */
+    void success();
     /**
      * 创建虚拟网卡成功的回调方法
      *
diff --git a/vnt-jni/java/top/wherewego/vnt/jni/Config.java b/vnt-jni/java/top/wherewego/vnt/jni/Config.java
index 576b62f..5ed0674 100644
--- a/vnt-jni/java/top/wherewego/vnt/jni/Config.java
+++ b/vnt-jni/java/top/wherewego/vnt/jni/Config.java
@@ -90,6 +90,18 @@ public class Config {
      * 虚拟网卡fd 仅在android上支持
      */
     private int deviceFd;
+    /**
+     * enum: relay/p2p/all
+     */
+    private String useChannel;
+    /**
+     * 模拟丢包率，取0~1之间的数，为null表示不丢包，1表示全部丢包
+     */
+    private Double packetLossRate;
+    /**
+     * 模拟延迟 单位毫秒(ms)
+     */
+    private Integer packetDelay;
 
     public Config() {
     }
@@ -261,4 +273,28 @@ public class Config {
     public void setDeviceFd(int deviceFd) {
         this.deviceFd = deviceFd;
     }
+
+    public String getUseChannel() {
+        return useChannel;
+    }
+
+    public void setUseChannel(String useChannel) {
+        this.useChannel = useChannel;
+    }
+
+    public Double getPacketLossRate() {
+        return packetLossRate;
+    }
+
+    public void setPacketLossRate(Double packetLossRate) {
+        this.packetLossRate = packetLossRate;
+    }
+
+    public Integer getPacketDelay() {
+        return packetDelay;
+    }
+
+    public void setPacketDelay(Integer packetDelay) {
+        this.packetDelay = packetDelay;
+    }
 }
diff --git a/vnt-jni/java/top/wherewego/vnt/jni/IpUtils.java b/vnt-jni/java/top/wherewego/vnt/jni/IpUtils.java
index 4f403c3..6a07746 100644
--- a/vnt-jni/java/top/wherewego/vnt/jni/IpUtils.java
+++ b/vnt-jni/java/top/wherewego/vnt/jni/IpUtils.java
@@ -1,8 +1,9 @@
 package top.wherewego.vnt.jni;
 
 /**
- * @author lubeilin
- * @date: 2024/02/27 18:31
+ * ip转换
+ *
+ * @author https://github.com/lbl8603/vnt
  */
 public class IpUtils {
     public static String intToIpAddress(int ipAddress) {
diff --git a/vnt-jni/java/top/wherewego/vnt/jni/Vnt.java b/vnt-jni/java/top/wherewego/vnt/jni/Vnt.java
index 488695b..199a564 100644
--- a/vnt-jni/java/top/wherewego/vnt/jni/Vnt.java
+++ b/vnt-jni/java/top/wherewego/vnt/jni/Vnt.java
@@ -11,11 +11,8 @@ import java.io.IOException;
 public class Vnt implements Closeable {
     private final long raw;
 
-    public Vnt(Config config, CallBack callBack) {
+    public Vnt(Config config, CallBack callBack) throws Exception{
         this.raw = new0(config, callBack);
-        if(this.raw == 0){
-            throw new RuntimeException();
-        }
     }
 
     public void stop() {
@@ -30,7 +27,7 @@ public class Vnt implements Closeable {
         return list0(raw);
     }
 
-    private native long new0(Config config, CallBack callBack);
+    private native long new0(Config config, CallBack callBack) throws Exception;
 
     private native void stop0(long raw);
 
diff --git a/vnt-jni/src/callback.rs b/vnt-jni/src/callback.rs
index 1812766..14336cc 100644
--- a/vnt-jni/src/callback.rs
+++ b/vnt-jni/src/callback.rs
@@ -26,6 +26,11 @@ impl CallBack {
 }
 
 impl CallBack {
+    fn success0(&self) -> jni::errors::Result<()> {
+        let env = &mut self.jvm.attach_current_thread()? as &mut JNIEnv;
+        env.call_method(&self.this, "success", "()V", &[])?;
+        Ok(())
+    }
     fn create_tun0(&self, info: DeviceInfo) -> jni::errors::Result<()> {
         let env = &mut self.jvm.attach_current_thread()? as &mut JNIEnv;
         let param = env.new_object(
@@ -139,13 +144,16 @@ impl CallBack {
     }
     fn stop0(&self) -> jni::errors::Result<()> {
         let env = &mut self.jvm.attach_current_thread()? as &mut JNIEnv;
-        env.call_method(&self.this, "error", "()V", &[])?;
+        env.call_method(&self.this, "stop", "()V", &[])?;
         Ok(())
     }
 }
 
 impl VntCallback for CallBack {
     fn success(&self) {
+        if let Err(e) = self.success0() {
+            log::warn!("success {:?}", e);
+        }
     }
     fn create_tun(&self, info: DeviceInfo) {
         if let Err(e) = self.create_tun0(info) {
diff --git a/vnt-jni/src/config.rs b/vnt-jni/src/config.rs
index 21df406..b43d8d4 100644
--- a/vnt-jni/src/config.rs
+++ b/vnt-jni/src/config.rs
@@ -29,6 +29,11 @@ pub fn new_config(env: &mut JNIEnv, config: JObject) -> Result<Config, Error> {
     let use_channel = to_string(env, &config, "useChannel")?;
     let finger = env.get_field(&config, "finger", "Z")?.z()?;
     let first_latency = env.get_field(&config, "firstLatency", "Z")?.z()?;
+    let packet_delay = to_integer(env, &config, "packetDelay")?
+        .map(|v| v as u32)
+        .unwrap_or_default();
+    let packet_loss_rate = to_double(env, &config, "packetLossRate")?;
+
     let in_ips = to_string_array(env, &config, "inIps")?;
     let out_ips = to_string_array(env, &config, "outIps")?;
     let ports =
@@ -132,8 +137,8 @@ pub fn new_config(env: &mut JNIEnv, config: JObject) -> Result<Config, Error> {
         #[cfg(target_os = "android")]
         device_fd,
         UseChannelType::from_str(&use_channel.unwrap_or_default()).unwrap_or_default(),
-        None,
-        0,
+        packet_loss_rate,
+        packet_delay,
     ) {
         Ok(config) => config,
         Err(e) => {
diff --git a/vnt-jni/src/utils.rs b/vnt-jni/src/utils.rs
index dd204f4..46a5a1d 100644
--- a/vnt-jni/src/utils.rs
+++ b/vnt-jni/src/utils.rs
@@ -119,3 +119,13 @@ pub fn to_integer(env: &mut JNIEnv, config: &JObject, name: &str) -> Result<Opti
         env.call_method(value, "intValue", "()I", &[])?.i()? as _
     ));
 }
+pub fn to_double(env: &mut JNIEnv, config: &JObject, name: &str) -> Result<Option<f64>, Error> {
+    let value = env.get_field(config, name, "Ljava/lang/Double;")?.l()?;
+    if value.is_null() {
+        return Ok(None);
+    }
+    // 调用 intValue
+    return Ok(Some(
+        env.call_method(value, "doubleValue", "()D", &[])?.d()? as _,
+    ));
+}