From 6a53c52167fd229f754929d031fd9e3185682020 Mon Sep 17 00:00:00 2001
From: xjasonlyu <xjasonlyu@gmail.com>
Date: Sun, 3 Apr 2022 22:09:41 +0800
Subject: [PATCH] Chore: add udp-timeout constraint

---
 engine/engine.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/engine/engine.go b/engine/engine.go
index 017ff09..3f82c86 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net"
 	"sync"
+	"time"
 
 	"github.com/xjasonlyu/tun2socks/v2/component/dialer"
 	"github.com/xjasonlyu/tun2socks/v2/core"
@@ -113,6 +114,9 @@ func general(k *Key) error {
 	}
 
 	if k.UDPTimeout > 0 {
+		if k.UDPTimeout < time.Second {
+			return errors.New("invalid udp timeout value")
+		}
 		tunnel.SetUDPTimeout(k.UDPTimeout)
 	}
 	return nil