Add ParallelQuery and ServeStale features

v2rayN/ServiceLib/Global.cs

@@ -409,6 +409,7 @@ public class Global
     [
         "https://dns.alidns.com/dns-query",
         "https://doh.pub/dns-query",
+        "https://dns.alidns.com/dns-query,https://doh.pub/dns-query",
         "223.5.5.5",
         "119.29.29.29",
         "localhost"
@@ -417,8 +418,9 @@ public class Global
     public static readonly List<string> DomainRemoteDNSAddress =
     [
         "https://cloudflare-dns.com/dns-query",
-        "https://dns.cloudflare.com/dns-query",
         "https://dns.google/dns-query",
+        "https://cloudflare-dns.com/dns-query,https://dns.google/dns-query,8.8.8.8",
+        "https://dns.cloudflare.com/dns-query",
         "https://doh.dns.sb/dns-query",
         "https://doh.opendns.com/dns-query",
         "https://common.dot.dns.yandex.net",

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -114,6 +114,8 @@ public static class ConfigHandler
         config.SimpleDNSItem ??= InitBuiltinSimpleDNS();
         config.SimpleDNSItem.GlobalFakeIp ??= true;
         config.SimpleDNSItem.BootstrapDNS ??= Global.DomainPureIPDNSAddress.FirstOrDefault();
+        config.SimpleDNSItem.ServeStale ??= false;
+        config.SimpleDNSItem.ParallelQuery ??= false;
 
         config.SpeedTestItem ??= new();
         if (config.SpeedTestItem.SpeedTestTimeout < 10)

v2rayN/ServiceLib/Models/ConfigItems.cs

@@ -267,6 +267,8 @@ public class SimpleDNSItem
     public string? BootstrapDNS { get; set; }
     public string? Strategy4Freedom { get; set; }
     public string? Strategy4Proxy { get; set; }
+    public bool? ServeStale { get; set; }
+    public bool? ParallelQuery { get; set; }
     public string? Hosts { get; set; }
     public string? DirectExpectedIPs { get; set; }
 }

v2rayN/ServiceLib/Models/V2rayConfig.cs

@@ -3,7 +3,7 @@ namespace ServiceLib.Models;
 public class V2rayConfig
 {
     public Log4Ray log { get; set; }
-    public Dns4Ray dns { get; set; }
+    public object dns { get; set; }
     public List<Inbounds4Ray> inbounds { get; set; }
     public List<Outbounds4Ray> outbounds { get; set; }
     public Routing4Ray routing { get; set; }
@@ -208,12 +208,8 @@ public class Dns4Ray
 {
     public Dictionary<string, object>? hosts { get; set; }
     public List<object> servers { get; set; }
-    public string? clientIp { get; set; }
+    public bool? serveStale { get; set; }
-    public string? queryStrategy { get; set; }
+    public bool? enableParallelQuery { get; set; }
-    public bool? disableCache { get; set; }
-    public bool? disableFallback { get; set; }
-    public bool? disableFallbackIfMatch { get; set; }
-    public bool? useSystemHosts { get; set; }
     public string? tag { get; set; }
 }
 

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -3069,6 +3069,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Parallel Query 的本地化字符串。
+        /// </summary>
+        public static string TbParallelQuery {
+            get {
+                return ResourceManager.GetString("TbParallelQuery", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Path 的本地化字符串。
         /// </summary>
@@ -3438,6 +3447,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Serve Stale 的本地化字符串。
+        /// </summary>
+        public static string TbServeStale {
+            get {
+                return ResourceManager.GetString("TbServeStale", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Set system proxy 的本地化字符串。
         /// </summary>

v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx

@@ -1650,4 +1650,10 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.fr.resx

@@ -1647,4 +1647,10 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.hu.resx

@@ -1650,4 +1650,10 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1650,4 +1650,10 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.ru.resx

@@ -1650,4 +1650,10 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

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

@@ -1647,4 +1647,10 @@
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>证书指纹（SHA-256）</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>乐观缓存</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>并行查询</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx

@@ -1647,4 +1647,10 @@
   <data name="TbCertSha256Tips" xml:space="preserve">
     <value>Certificate fingerprint (SHA-256)</value>
   </data>
+  <data name="TbServeStale" xml:space="preserve">
+    <value>Serve Stale</value>
+  </data>
+  <data name="TbParallelQuery" xml:space="preserve">
+    <value>Parallel Query</value>
+  </data>
 </root>

v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayDnsService.cs

@@ -7,25 +7,35 @@ public partial class CoreConfigV2rayService
         try
         {
             var item = await AppManager.Instance.GetDNSItem(ECoreType.Xray);
-            if (item != null && item.Enabled == true)
+            if (item is { Enabled: true })
             {
                 var result = await GenDnsCompatible(node, v2rayConfig);
 
-                if (v2rayConfig.routing.domainStrategy == Global.IPIfNonMatch)
+                if (v2rayConfig.routing.domainStrategy != Global.IPIfNonMatch)
                 {
+                    return result;
+                }
+
                 // DNS routing
-                    v2rayConfig.dns.tag = Global.DnsTag;
+                var dnsObj = JsonUtils.SerializeToNode(v2rayConfig.dns);
+                if (dnsObj == null)
+                {
+                    return result;
+                }
+
+                dnsObj["tag"] = Global.DnsTag;
+                v2rayConfig.dns = JsonUtils.Deserialize<Dns4Ray>(JsonUtils.Serialize(dnsObj));
                 v2rayConfig.routing.rules.Add(new RulesItem4Ray
                 {
                     type = "field",
                     inboundTag = new List<string> { Global.DnsTag },
                     outboundTag = Global.ProxyTag,
                 });
-                }
 
                 return result;
             }
             var simpleDnsItem = _config.SimpleDNSItem;
+            var dnsItem = v2rayConfig.dns is Dns4Ray dns4Ray ? dns4Ray : new Dns4Ray();
 
             var strategy4Freedom = simpleDnsItem?.Strategy4Freedom ?? Global.AsIs;
             //Outbound Freedom domainStrategy
@@ -55,13 +65,16 @@ public partial class CoreConfigV2rayService
                     .ForEach(outbound => outbound.targetStrategy = strategy4Proxy);
             }
 
-            await GenDnsServers(node, v2rayConfig, simpleDnsItem);
+            await GenDnsServers(node, dnsItem, simpleDnsItem);
-            await GenDnsHosts(v2rayConfig, simpleDnsItem);
+            await GenDnsHosts(dnsItem, simpleDnsItem);
+
+            dnsItem.serveStale = simpleDnsItem?.ServeStale is true ? true : null;
+            dnsItem.enableParallelQuery = simpleDnsItem?.ParallelQuery is true ? true : null;
 
             if (v2rayConfig.routing.domainStrategy == Global.IPIfNonMatch)
             {
                 // DNS routing
-                v2rayConfig.dns.tag = Global.DnsTag;
+                dnsItem.tag = Global.DnsTag;
                 v2rayConfig.routing.rules.Add(new RulesItem4Ray
                 {
                     type = "field",
@@ -69,6 +82,8 @@ public partial class CoreConfigV2rayService
                     outboundTag = Global.ProxyTag,
                 });
             }
+
+            v2rayConfig.dns = dnsItem;
         }
         catch (Exception ex)
         {
@@ -77,7 +92,7 @@ public partial class CoreConfigV2rayService
         return 0;
     }
 
-    private async Task<int> GenDnsServers(ProfileItem? node, V2rayConfig v2rayConfig, SimpleDNSItem simpleDNSItem)
+    private async Task<int> GenDnsServers(ProfileItem? node, Dns4Ray dnsItem, SimpleDNSItem simpleDNSItem)
     {
         static List<string> ParseDnsAddresses(string? dnsInput, string defaultAddress)
         {
@@ -90,7 +105,7 @@ public partial class CoreConfigV2rayService
             return addresses.Count > 0 ? addresses : new List<string> { defaultAddress };
         }
 
-        static object CreateDnsServer(string dnsAddress, List<string> domains, List<string>? expectedIPs = null)
+        static object? CreateDnsServer(string dnsAddress, List<string> domains, List<string>? expectedIPs = null)
         {
             var (domain, scheme, port, path) = Utils.ParseUrl(dnsAddress);
             var domainFinal = dnsAddress;
@@ -119,8 +134,8 @@ public partial class CoreConfigV2rayService
             });
         }
 
-        var directDNSAddress = ParseDnsAddresses(simpleDNSItem?.DirectDNS, Global.DomainDirectDNSAddress.FirstOrDefault());
+        var directDNSAddress = ParseDnsAddresses(simpleDNSItem?.DirectDNS, Global.DomainDirectDNSAddress.First());
-        var remoteDNSAddress = ParseDnsAddresses(simpleDNSItem?.RemoteDNS, Global.DomainRemoteDNSAddress.FirstOrDefault());
+        var remoteDNSAddress = ParseDnsAddresses(simpleDNSItem?.RemoteDNS, Global.DomainRemoteDNSAddress.First());
 
         var directDomainList = new List<string>();
         var directGeositeList = new List<string>();
@@ -130,7 +145,7 @@ public partial class CoreConfigV2rayService
         var expectedIPs = new List<string>();
         var regionNames = new HashSet<string>();
 
-        var bootstrapDNSAddress = ParseDnsAddresses(simpleDNSItem?.BootstrapDNS, Global.DomainPureIPDNSAddress.FirstOrDefault());
+        var bootstrapDNSAddress = ParseDnsAddresses(simpleDNSItem?.BootstrapDNS, Global.DomainPureIPDNSAddress.First());
         var dnsServerDomains = new List<string>();
 
         foreach (var dns in directDNSAddress)
@@ -184,8 +199,6 @@ public partial class CoreConfigV2rayService
 
         var routing = await ConfigHandler.GetDefaultRouting(_config);
         List<RulesItem>? rules = null;
-        if (routing != null)
-        {
         rules = JsonUtils.Deserialize<List<RulesItem>>(routing.RuleSet) ?? [];
         foreach (var item in rules)
         {
@@ -232,7 +245,6 @@ public partial class CoreConfigV2rayService
                 }
             }
         }
-        }
 
         if (Utils.IsDomain(node?.Address))
         {
@@ -257,8 +269,7 @@ public partial class CoreConfigV2rayService
             }
         }
 
-        v2rayConfig.dns ??= new Dns4Ray();
+        dnsItem.servers ??= [];
-        v2rayConfig.dns.servers ??= new List<object>();
 
         void AddDnsServers(List<string> dnsAddresses, List<string> domains, List<string>? expectedIPs = null)
         {
@@ -266,7 +277,7 @@ public partial class CoreConfigV2rayService
             {
                 foreach (var dnsAddress in dnsAddresses)
                 {
-                    v2rayConfig.dns.servers.Add(CreateDnsServer(dnsAddress, domains, expectedIPs));
+                    dnsItem.servers.Add(CreateDnsServer(dnsAddress, domains, expectedIPs));
                 }
             }
         }
@@ -288,22 +299,21 @@ public partial class CoreConfigV2rayService
                 || lastRule.Ip?.Contains("0.0.0.0/0") == true);
 
         var defaultDnsServers = useDirectDns ? directDNSAddress : remoteDNSAddress;
-        v2rayConfig.dns.servers.AddRange(defaultDnsServers);
+        dnsItem.servers.AddRange(defaultDnsServers);
 
         return 0;
     }
 
-    private async Task<int> GenDnsHosts(V2rayConfig v2rayConfig, SimpleDNSItem simpleDNSItem)
+    private async Task<int> GenDnsHosts(Dns4Ray dnsItem, SimpleDNSItem simpleDNSItem)
     {
         if (simpleDNSItem.AddCommonHosts == false && simpleDNSItem.UseSystemHosts == false && simpleDNSItem.Hosts.IsNullOrEmpty())
         {
             return await Task.FromResult(0);
         }
-        v2rayConfig.dns ??= new Dns4Ray();
+        dnsItem.hosts ??= new Dictionary<string, object>();
-        v2rayConfig.dns.hosts ??= new Dictionary<string, object>();
         if (simpleDNSItem.AddCommonHosts == true)
         {
-            v2rayConfig.dns.hosts = Global.PredefinedHosts.ToDictionary(
+            dnsItem.hosts = Global.PredefinedHosts.ToDictionary(
                 kvp => kvp.Key,
                 kvp => (object)kvp.Value
             );
@@ -312,7 +322,7 @@ public partial class CoreConfigV2rayService
         if (simpleDNSItem.UseSystemHosts == true)
         {
             var systemHosts = Utils.GetSystemHosts();
-            var normalHost = v2rayConfig?.dns?.hosts;
+            var normalHost = dnsItem.hosts;
 
             if (normalHost != null && systemHosts?.Count > 0)
             {
@@ -329,7 +339,7 @@ public partial class CoreConfigV2rayService
 
             foreach (var kvp in userHostsMap)
             {
-                v2rayConfig.dns.hosts[kvp.Key] = kvp.Value;
+                dnsItem.hosts[kvp.Key] = kvp.Value;
             }
         }
         return await Task.FromResult(0);

v2rayN/ServiceLib/ViewModels/DNSSettingViewModel.cs

@@ -13,6 +13,8 @@ public class DNSSettingViewModel : MyReactiveObject
     [Reactive] public string? Strategy4Proxy { get; set; }
     [Reactive] public string? Hosts { get; set; }
     [Reactive] public string? DirectExpectedIPs { get; set; }
+    [Reactive] public bool? ParallelQuery { get; set; }
+    [Reactive] public bool? ServeStale { get; set; }
 
     [Reactive] public bool UseSystemHostsCompatible { get; set; }
     [Reactive] public string DomainStrategy4FreedomCompatible { get; set; }
@@ -73,6 +75,8 @@ public class DNSSettingViewModel : MyReactiveObject
         Strategy4Proxy = item.Strategy4Proxy;
         Hosts = item.Hosts;
         DirectExpectedIPs = item.DirectExpectedIPs;
+        ParallelQuery = item.ParallelQuery;
+        ServeStale = item.ServeStale;
 
         var item1 = await AppManager.Instance.GetDNSItem(ECoreType.Xray);
         RayCustomDNSEnableCompatible = item1.Enabled;
@@ -102,6 +106,8 @@ public class DNSSettingViewModel : MyReactiveObject
         _config.SimpleDNSItem.Strategy4Proxy = Strategy4Proxy;
         _config.SimpleDNSItem.Hosts = Hosts;
         _config.SimpleDNSItem.DirectExpectedIPs = DirectExpectedIPs;
+        _config.SimpleDNSItem.ParallelQuery = ParallelQuery;
+        _config.SimpleDNSItem.ServeStale = ServeStale;
 
         if (NormalDNSCompatible.IsNotEmpty())
         {

v2rayN/v2rayN.Desktop/Views/DNSSettingWindow.axaml

@@ -138,13 +138,26 @@
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
-                            Text="{x:Static resx:ResUI.TbAddCommonDNSHosts}" />
+                            Text="{x:Static resx:ResUI.TbParallelQuery}" />
                         <ToggleSwitch
-                            x:Name="togAddCommonHosts"
+                            x:Name="togParallelQuery"
                             Grid.Row="7"
                             Grid.Column="1"
                             Margin="{StaticResource Margin4}"
                             HorizontalAlignment="Left" />
+                        
+                        <TextBlock
+                            Grid.Row="8"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbServeStale}" />
+                        <ToggleSwitch
+                            x:Name="togServeStale"
+                            Grid.Row="8"
+                            Grid.Column="1"
+                            Margin="{StaticResource Margin4}"
+                            HorizontalAlignment="Left" />
                     </Grid>
                 </ScrollViewer>
             </TabItem>
@@ -155,7 +168,7 @@
                         x:Name="gridAdvancedDNSSettings"
                         Margin="{StaticResource Margin8}"
                         ColumnDefinitions="Auto,Auto,*"
-                        RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,*">
+                        RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,*">
 
                         <TextBlock
                             x:Name="txtAdvancedDNSSettingsInvalid"
@@ -183,15 +196,28 @@
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
-                            Text="{x:Static resx:ResUI.TbFakeIP}" />
+                            Text="{x:Static resx:ResUI.TbAddCommonDNSHosts}" />
                         <ToggleSwitch
-                            x:Name="togFakeIP"
+                            x:Name="togAddCommonHosts"
                             Grid.Row="2"
                             Grid.Column="1"
                             Margin="{StaticResource Margin4}"
                             HorizontalAlignment="Left" />
+
                         <TextBlock
-                            Grid.Row="2"
+                            Grid.Row="3"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbFakeIP}" />
+                        <ToggleSwitch
+                            x:Name="togFakeIP"
+                            Grid.Row="3"
+                            Grid.Column="1"
+                            Margin="{StaticResource Margin4}"
+                            HorizontalAlignment="Left" />
+                        <TextBlock
+                            Grid.Row="3"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -199,19 +225,19 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbBlockSVCBHTTPSQueries}" />
                         <ToggleSwitch
                             x:Name="togBlockBindingQuery"
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="1"
                             Margin="{StaticResource Margin4}"
                             HorizontalAlignment="Left" />
                         <TextBlock
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -219,20 +245,20 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="0"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
                             Text="{x:Static resx:ResUI.TbValidateDirectExpectedIPs}" />
                         <ComboBox
                             x:Name="cmbDirectExpectedIPs"
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="1"
                             Width="200"
                             Margin="{StaticResource Margin4}"
                             IsEditable="True" />
                         <TextBlock
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="2"
                             Margin="{StaticResource Margin4}"
                             VerticalAlignment="Center"
@@ -240,7 +266,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="5"
+                            Grid.Row="6"
                             Grid.Column="0"
                             Grid.ColumnSpan="3"
                             Margin="{StaticResource Margin4}"
@@ -249,7 +275,7 @@
 
                         <TextBox
                             x:Name="txtHosts"
-                            Grid.Row="6"
+                            Grid.Row="7"
                             Grid.Column="0"
                             Grid.ColumnSpan="3"
                             Margin="{StaticResource Margin4}"

v2rayN/v2rayN.Desktop/Views/DNSSettingWindow.axaml.cs

@@ -40,6 +40,8 @@ public partial class DNSSettingWindow : WindowBase<DNSSettingViewModel>
             this.Bind(ViewModel, vm => vm.Strategy4Proxy, v => v.cmbRemoteDNSStrategy.SelectedItem).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.Hosts, v => v.txtHosts.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.DirectExpectedIPs, v => v.cmbDirectExpectedIPs.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ParallelQuery, v => v.togParallelQuery.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ServeStale, v => v.togServeStale.IsChecked).DisposeWith(disposables);
 
             this.BindCommand(ViewModel, vm => vm.SaveCmd, v => v.btnSave).DisposeWith(disposables);
 

v2rayN/v2rayN/Views/DNSSettingWindow.xaml

@@ -171,13 +171,27 @@
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
                             Style="{StaticResource ToolbarTextBlock}"
-                            Text="{x:Static resx:ResUI.TbAddCommonDNSHosts}" />
+                            Text="{x:Static resx:ResUI.TbParallelQuery}" />
                         <ToggleButton
-                            x:Name="togAddCommonHosts"
+                            x:Name="togParallelQuery"
                             Grid.Row="7"
                             Grid.Column="1"
                             Margin="{StaticResource Margin8}"
                             HorizontalAlignment="Left" />
+
+                        <TextBlock
+                            Grid.Row="8"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbServeStale}" />
+                        <ToggleButton
+                            x:Name="togServeStale"
+                            Grid.Row="8"
+                            Grid.Column="1"
+                            Margin="{StaticResource Margin8}"
+                            HorizontalAlignment="Left" />
                     </Grid>
                 </ScrollViewer>
             </TabItem>
@@ -191,6 +205,7 @@
                             <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
                             <RowDefinition Height="*" />
                         </Grid.RowDefinitions>
                         <Grid.ColumnDefinitions>
@@ -229,15 +244,29 @@
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
                             Style="{StaticResource ToolbarTextBlock}"
-                            Text="{x:Static resx:ResUI.TbFakeIP}" />
+                            Text="{x:Static resx:ResUI.TbAddCommonDNSHosts}" />
                         <ToggleButton
-                            x:Name="togFakeIP"
+                            x:Name="togAddCommonHosts"
                             Grid.Row="2"
                             Grid.Column="1"
                             Margin="{StaticResource Margin8}"
                             HorizontalAlignment="Left" />
+
                         <TextBlock
-                            Grid.Row="2"
+                            Grid.Row="3"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbFakeIP}" />
+                        <ToggleButton
+                            x:Name="togFakeIP"
+                            Grid.Row="3"
+                            Grid.Column="1"
+                            Margin="{StaticResource Margin8}"
+                            HorizontalAlignment="Left" />
+                        <TextBlock
+                            Grid.Row="3"
                             Grid.Column="2"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -246,7 +275,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -254,12 +283,12 @@
                             Text="{x:Static resx:ResUI.TbBlockSVCBHTTPSQueries}" />
                         <ToggleButton
                             x:Name="togBlockBindingQuery"
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="1"
                             Margin="{StaticResource Margin8}"
                             HorizontalAlignment="Left" />
                         <TextBlock
-                            Grid.Row="3"
+                            Grid.Row="4"
                             Grid.Column="2"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -268,7 +297,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="0"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -276,14 +305,14 @@
                             Text="{x:Static resx:ResUI.TbValidateDirectExpectedIPs}" />
                         <ComboBox
                             x:Name="cmbDirectExpectedIPs"
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="1"
                             Width="200"
                             Margin="{StaticResource Margin8}"
                             IsEditable="True"
                             Style="{StaticResource DefComboBox}" />
                         <TextBlock
-                            Grid.Row="4"
+                            Grid.Row="5"
                             Grid.Column="2"
                             Margin="{StaticResource Margin8}"
                             VerticalAlignment="Center"
@@ -292,7 +321,7 @@
                             TextWrapping="Wrap" />
 
                         <TextBlock
-                            Grid.Row="5"
+                            Grid.Row="6"
                             Grid.Column="0"
                             Grid.ColumnSpan="3"
                             Margin="{StaticResource Margin8}"
@@ -301,7 +330,7 @@
                             Text="{x:Static resx:ResUI.TbDNSHostsConfig}" />
                         <TextBox
                             x:Name="txtHosts"
-                            Grid.Row="6"
+                            Grid.Row="7"
                             Grid.Column="0"
                             Grid.ColumnSpan="3"
                             Margin="{StaticResource Margin8}"

v2rayN/v2rayN/Views/DNSSettingWindow.xaml.cs

@@ -38,6 +38,8 @@ public partial class DNSSettingWindow
             this.Bind(ViewModel, vm => vm.Strategy4Proxy, v => v.cmbRemoteDNSStrategy.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.Hosts, v => v.txtHosts.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.DirectExpectedIPs, v => v.cmbDirectExpectedIPs.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ParallelQuery, v => v.togParallelQuery.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ServeStale, v => v.togServeStale.IsChecked).DisposeWith(disposables);
 
             this.BindCommand(ViewModel, vm => vm.SaveCmd, v => v.btnSave).DisposeWith(disposables);