Fix node domain resolving in TUN mode

https://github.com/2dust/v2rayN/pull/7989

v2rayN/ServiceLib/Global.cs

@@ -598,6 +598,7 @@ public class Global
             { "cloudflare-dns.com", new List<string> { "104.16.249.249", "104.16.248.249", "2606:4700::6810:f8f9", "2606:4700::6810:f9f9" } },
             { "dns.cloudflare.com", new List<string> { "104.16.132.229", "104.16.133.229", "2606:4700::6810:84e5", "2606:4700::6810:85e5" } },
             { "dot.pub", new List<string> { "1.12.12.12", "120.53.53.53" } },
+            { "doh.pub", new List<string> { "1.12.12.12", "120.53.53.53" } },
             { "dns.quad9.net", new List<string> { "9.9.9.9", "149.112.112.112", "2620:fe::fe", "2620:fe::9" } },
             { "dns.yandex.net", new List<string> { "77.88.8.8", "77.88.8.1", "2a02:6b8::feed:0ff", "2a02:6b8:0:1::feed:0ff" } },
             { "dns.sb", new List<string> { "185.222.222.222", "2a09::" } },

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -1214,11 +1214,11 @@ public static class ConfigHandler
                 CoreType = ECoreType.sing_box,
                 ConfigType = EConfigType.SOCKS,
                 Address = Global.Loopback,
-                Sni = node.Address, //Tun2SocksAddress
+                SpiderX = node.Address, // Tun2SocksAddress
                 Port = AppManager.Instance.GetLocalPort(EInboundProtocol.socks)
             };
         }
-        else if ((node.ConfigType == EConfigType.Custom && node.PreSocksPort > 0))
+        else if (node.ConfigType == EConfigType.Custom && node.PreSocksPort > 0)
         {
             var preCoreType = config.RunningCoreType = config.TunModeItem.EnableTun ? ECoreType.sing_box : ECoreType.Xray;
             itemSocks = new ProfileItem()

v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxDnsService.cs

@@ -43,16 +43,7 @@ public partial class CoreConfigSingboxService
                 });
             }
 
-            // Tun2SocksAddress
+            await GenOutboundDnsRule(node, singboxConfig, Global.SingboxOutboundResolverTag);
-            if (node != null && Utils.IsDomain(node.Address))
-            {
-                singboxConfig.dns.rules ??= new List<Rule4Sbox>();
-                singboxConfig.dns.rules.Insert(0, new Rule4Sbox
-                {
-                    server = Global.SingboxOutboundResolverTag,
-                    domain = [node.Address],
-                });
-            }
         }
         catch (Exception ex)
         {
@@ -346,16 +337,7 @@ public partial class CoreConfigSingboxService
                 await GenDnsDomainsLegacyCompatible(singboxConfig, item);
             }
 
-            // Tun2SocksAddress
+            await GenOutboundDnsRule(node, singboxConfig, Global.SingboxFinalResolverTag);
-            if (node != null && Utils.IsDomain(node.Address))
-            {
-                singboxConfig.dns.rules ??= new List<Rule4Sbox>();
-                singboxConfig.dns.rules.Insert(0, new Rule4Sbox
-                {
-                    server = Global.SingboxFinalResolverTag,
-                    domain = [node.Address],
-                });
-            }
         }
         catch (Exception ex)
         {
@@ -425,6 +407,37 @@ public partial class CoreConfigSingboxService
         return await Task.FromResult(0);
     }
 
+    private async Task<int> GenOutboundDnsRule(ProfileItem? node, SingboxConfig singboxConfig, string? server)
+    {
+        if (node == null)
+        {
+            return 0;
+        }
+
+        var domain = string.Empty;
+        if (Utils.IsDomain(node.Address)) // normal outbound
+        {
+            domain = node.Address;
+        }
+        else if (node.Address == Global.Loopback && node.SpiderX.IsNotEmpty() && Utils.IsDomain(node.SpiderX)) // Tun2SocksAddress
+        {
+            domain = node.SpiderX;
+        }
+        if (domain.IsNullOrEmpty())
+        {
+            return 0;
+        }
+
+        singboxConfig.dns.rules ??= new List<Rule4Sbox>();
+        singboxConfig.dns.rules.Insert(0, new Rule4Sbox
+        {
+            server = server,
+            domain = [domain],
+        });
+
+        return await Task.FromResult(0);
+    }
+
     private static Server4Sbox? ParseDnsAddress(string address)
     {
         var addressFirst = address?.Split(address.Contains(',') ? ',' : ';').FirstOrDefault()?.Trim();

v2rayN/v2rayN/Common/QRCodeUtils.cs

@@ -32,8 +32,8 @@ public class QRCodeUtils
         {
             GetDpi(window, out var dpiX, out var dpiY);
 
-            var left = (int)(SystemParameters.WorkArea.Left);
+            var left = (int)SystemParameters.WorkArea.Left;
-            var top = (int)(SystemParameters.WorkArea.Top);
+            var top = (int)SystemParameters.WorkArea.Top;
             var width = (int)(SystemParameters.WorkArea.Width / dpiX);
             var height = (int)(SystemParameters.WorkArea.Height / dpiY);