From f1b3a8a28cca16ce5e8c7876e973a693f2dadb58 Mon Sep 17 00:00:00 2001
From: DHR60 <dehongren60@gmail.com>
Date: Tue, 14 Apr 2026 16:43:39 +0800
Subject: [PATCH] Fix sing-box tun

---
 .../Singbox/SingboxInboundService.cs          |  2 +-
 .../Singbox/SingboxRoutingService.cs          | 45 +++++--------------
 2 files changed, 11 insertions(+), 36 deletions(-)

diff --git a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs
index 3a27c7da..13c4e40b 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs
@@ -11,7 +11,7 @@ public partial class CoreConfigSingboxService
             _coreConfig.inbounds = [];
 
             if (!context.IsTunEnabled
-                || (context.IsTunEnabled && _node.Port != listenPort))
+                || (context.IsTunEnabled && _node.Address != Global.Loopback && _node.Port != listenPort))
             {
                 var inbound = new Inbound4Sbox()
                 {
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs
index 01c32cc2..5d19ddb7 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs
@@ -34,14 +34,14 @@ public partial class CoreConfigSingboxService
                     _coreConfig.route.rules.AddRange(tunRules);
                 }
 
-                var (lstDnsExe, lstDirectExe) = BuildRoutingDirectExe();
                 _coreConfig.route.rules.Add(new()
                 {
                     port = [53],
-                    action = "hijack-dns",
-                    process_name = lstDnsExe
+                    network = ["udp"],
+                    action = "hijack-dns"
                 });
 
+                var lstDirectExe = BuildRoutingDirectExe();
                 _coreConfig.route.rules.Add(new()
                 {
                     outbound = Global.DirectTag,
@@ -79,28 +79,6 @@ public partial class CoreConfigSingboxService
                 }
             }
 
-            if (_config.Inbound.First().SniffingEnabled)
-            {
-                _coreConfig.route.rules.Add(new()
-                {
-                    action = "sniff"
-                });
-                _coreConfig.route.rules.Add(new()
-                {
-                    protocol = ["dns"],
-                    action = "hijack-dns"
-                });
-            }
-            else
-            {
-                _coreConfig.route.rules.Add(new()
-                {
-                    port = [53],
-                    network = ["udp"],
-                    action = "hijack-dns"
-                });
-            }
-
             var hostsDomains = new List<string>();
             if (rawDNSItem is not { Enabled: true })
             {
@@ -234,9 +212,8 @@ public partial class CoreConfigSingboxService
         }
     }
 
-    private static (List<string> lstDnsExe, List<string> lstDirectExe) BuildRoutingDirectExe()
+    private static List<string> BuildRoutingDirectExe()
     {
-        var dnsExeSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         var directExeSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
 
         var coreInfoResult = CoreInfoManager.Instance.GetCoreInfo();
@@ -248,20 +225,18 @@ public partial class CoreConfigSingboxService
                 continue;
             }
 
+            if (coreConfig.CoreExes == null)
+            {
+                continue;
+            }
+
             foreach (var baseExeName in coreConfig.CoreExes)
             {
-                if (coreConfig.CoreType != ECoreType.sing_box)
-                {
-                    dnsExeSet.Add(Utils.GetExeName(baseExeName));
-                }
                 directExeSet.Add(Utils.GetExeName(baseExeName));
             }
         }
 
-        var lstDnsExe = new List<string>(dnsExeSet);
-        var lstDirectExe = new List<string>(directExeSet);
-
-        return (lstDnsExe, lstDirectExe);
+        return new List<string>(directExeSet);
     }
 
     private void GenRoutingUserRule(RulesItem? item)