Default domain strategy for resolving the outbound domain names -- singbox

v2rayN/v2rayN/Global.cs

@@ -172,6 +172,7 @@ namespace v2rayN
 
         public static readonly List<string> AllowInsecure = new() { "true", "false", "" };
         public static readonly List<string> DomainStrategy4Freedoms = new() { "AsIs", "UseIP", "UseIPv4", "UseIPv6", "" };
+        public static readonly List<string> SingboxDomainStrategy4Out = new() { "ipv4_only", "prefer_ipv4", "prefer_ipv6", "ipv6_only", "" };
         public static readonly List<string> Languages = new() { "zh-Hans", "zh-Hant", "en", "fa-Ir", "ru" };
         public static readonly List<string> Alpns = new() { "h3", "h2", "http/1.1", "h3,h2,http/1.1", "h3,h2", "h2,http/1.1", "" };
         public static readonly List<string> LogLevels = new() { "debug", "info", "warning", "error", "none" };

v2rayN/v2rayN/Handler/CoreConfig/CoreConfigSingbox.cs

@@ -826,7 +826,7 @@ namespace v2rayN.Handler.CoreConfig
                 }
                 singboxConfig.dns = dns4Sbox;
 
-                GenDnsDomains(node, singboxConfig);
+                GenDnsDomains(node, singboxConfig, item?.domainStrategy4Freedom);
             }
             catch (Exception ex)
             {
@@ -835,7 +835,7 @@ namespace v2rayN.Handler.CoreConfig
             return 0;
         }
 
-        private int GenDnsDomains(ProfileItem? node, SingboxConfig singboxConfig)
+        private int GenDnsDomains(ProfileItem? node, SingboxConfig singboxConfig, string? strategy)
         {
             var dns4Sbox = singboxConfig.dns ?? new();
             dns4Sbox.servers ??= [];
@@ -847,7 +847,7 @@ namespace v2rayN.Handler.CoreConfig
                 tag = tag,
                 address = "223.5.5.5",
                 detour = Global.DirectTag,
-                //strategy = strategy
+                strategy = strategy
             });
 
             var lstDomain = singboxConfig.outbounds
@@ -1144,7 +1144,7 @@ namespace v2rayN.Handler.CoreConfig
                     singboxConfig.route.rules.Add(rule);
                 }
 
-                GenDnsDomains(null, singboxConfig);
+                GenDnsDomains(null, singboxConfig, null);
                 //var dnsServer = singboxConfig.dns?.servers.FirstOrDefault();
                 //if (dnsServer != null)
                 //{

v2rayN/v2rayN/Models/ConfigItems.cs

@@ -169,7 +169,7 @@ namespace v2rayN.Models
         public string stack { get; set; }
         public int mtu { get; set; }
         public bool enableExInbound { get; set; }
-        public bool enableIPv6Address { get; set; } = true;
+        public bool enableIPv6Address { get; set; }
     }
 
     [Serializable]

v2rayN/v2rayN/Resx/ResUI.Designer.cs

@@ -2734,6 +2734,15 @@ namespace v2rayN.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Default domain strategy for outbound 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsDomainStrategy4Out {
+            get {
+                return ResourceManager.GetString("TbSettingsDomainStrategy4Out", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Double-click server make active 的本地化字符串。
         /// </summary>

v2rayN/v2rayN/Resx/ResUI.resx

@@ -1297,4 +1297,7 @@
   <data name="menuProxiesSelectActivity" xml:space="preserve">
     <value>Select active node (Enter)</value>
   </data>
+  <data name="TbSettingsDomainStrategy4Out" xml:space="preserve">
+    <value>Default domain strategy for outbound</value>
+  </data>
 </root>

v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx

@@ -1294,4 +1294,7 @@
   <data name="menuProxiesSelectActivity" xml:space="preserve">
     <value>设为活动节点 (Enter)</value>
   </data>
+  <data name="TbSettingsDomainStrategy4Out" xml:space="preserve">
+    <value>Outbound默认解析策略</value>
+  </data>
 </root>

v2rayN/v2rayN/ViewModels/DNSSettingViewModel.cs

@@ -21,6 +21,7 @@ namespace v2rayN.ViewModels
         [Reactive] public string normalDNS { get; set; }
         [Reactive] public string normalDNS2 { get; set; }
         [Reactive] public string tunDNS2 { get; set; }
+        [Reactive] public string domainStrategy4Freedom2 { get; set; }
 
         public ReactiveCommand<Unit, Unit> SaveCmd { get; }
         public ReactiveCommand<Unit, Unit> ImportDefConfig4V2rayCmd { get; }
@@ -34,12 +35,13 @@ namespace v2rayN.ViewModels
 
             var item = LazyConfig.Instance.GetDNSItem(ECoreType.Xray);
             useSystemHosts = item.useSystemHosts;
-            domainStrategy4Freedom = item?.domainStrategy4Freedom!;
-            normalDNS = item?.normalDNS!;
+            domainStrategy4Freedom = item?.domainStrategy4Freedom ?? string.Empty;
+            normalDNS = item?.normalDNS ?? string.Empty;
 
             var item2 = LazyConfig.Instance.GetDNSItem(ECoreType.sing_box);
-            normalDNS2 = item2?.normalDNS!;
-            tunDNS2 = item2?.tunDNS!;
+            normalDNS2 = item2?.normalDNS ?? string.Empty;
+            tunDNS2 = item2?.tunDNS ?? string.Empty;
+            domainStrategy4Freedom2 = item2?.domainStrategy4Freedom ?? string.Empty;
 
             SaveCmd = ReactiveCommand.Create(() =>
             {
@@ -105,6 +107,7 @@ namespace v2rayN.ViewModels
             var item2 = LazyConfig.Instance.GetDNSItem(ECoreType.sing_box);
             item2.normalDNS = JsonUtils.Serialize(JsonUtils.ParseJson(normalDNS2));
             item2.tunDNS = JsonUtils.Serialize(JsonUtils.ParseJson(tunDNS2));
+            item2.domainStrategy4Freedom = domainStrategy4Freedom2;
             ConfigHandler.SaveDNSItems(_config, item2);
 
             _noticeHandler?.Enqueue(ResUI.OperationSuccess);

v2rayN/v2rayN/Views/DNSSettingWindow.xaml

@@ -132,6 +132,19 @@
                             Style="{StaticResource DefButton}" />
                     </StackPanel>
 
+                    <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
+                        <TextBlock
+                            Margin="{StaticResource SettingItemMargin}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbSettingsDomainStrategy4Out}" />
+                        <ComboBox
+                            x:Name="cmbdomainStrategy4Out"
+                            Width="200"
+                            Margin="{StaticResource SettingItemMargin}"
+                            Style="{StaticResource DefComboBox}" />
+                    </StackPanel>
+
                     <Grid Margin="{StaticResource SettingItemMargin}">
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="1*" />

v2rayN/v2rayN/Views/DNSSettingWindow.xaml.cs

@@ -34,12 +34,18 @@ namespace v2rayN.Views
             {
                 cmbdomainStrategy4Freedom.Items.Add(it);
             });
+            Global.SingboxDomainStrategy4Out.ForEach(it =>
+            {
+                cmbdomainStrategy4Out.Items.Add(it);
+            });
+            
 
             this.WhenActivated(disposables =>
             {
                 this.Bind(ViewModel, vm => vm.useSystemHosts, v => v.togUseSystemHosts.IsChecked).DisposeWith(disposables);
                 this.Bind(ViewModel, vm => vm.domainStrategy4Freedom, v => v.cmbdomainStrategy4Freedom.Text).DisposeWith(disposables);
                 this.Bind(ViewModel, vm => vm.normalDNS, v => v.txtnormalDNS.Text).DisposeWith(disposables);
+                this.Bind(ViewModel, vm => vm.domainStrategy4Freedom2, v => v.cmbdomainStrategy4Out.Text).DisposeWith(disposables);
                 this.Bind(ViewModel, vm => vm.normalDNS2, v => v.txtnormalDNS2.Text).DisposeWith(disposables);
                 this.Bind(ViewModel, vm => vm.tunDNS2, v => v.txttunDNS2.Text).DisposeWith(disposables);