Add fallback support

v2rayN/ServiceLib/Enums/EMultipleLoad.cs

@@ -3,6 +3,7 @@ namespace ServiceLib.Enums;
 public enum EMultipleLoad
 {
     LeastPing,
+    Fallback,
     Random,
     RoundRobin,
     LeastLoad

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -1199,16 +1199,22 @@ public static class ConfigHandler
         {
             remark = multipleLoad switch
             {
+                EMultipleLoad.LeastPing => ResUI.menuGenGroupMultipleServerXrayLeastPing,
+                EMultipleLoad.Fallback => ResUI.menuGenGroupMultipleServerXrayFallback,
                 EMultipleLoad.Random => ResUI.menuGenGroupMultipleServerXrayRandom,
                 EMultipleLoad.RoundRobin => ResUI.menuGenGroupMultipleServerXrayRoundRobin,
-                EMultipleLoad.LeastPing => ResUI.menuGenGroupMultipleServerXrayLeastPing,
                 EMultipleLoad.LeastLoad => ResUI.menuGenGroupMultipleServerXrayLeastLoad,
                 _ => ResUI.menuGenGroupMultipleServerXrayRoundRobin,
             };
         }
         else if (coreType == ECoreType.sing_box)
         {
-            remark = ResUI.menuGenGroupMultipleServerSingBoxLeastPing;
+            remark = multipleLoad switch
+            {
+                EMultipleLoad.LeastPing => ResUI.menuGenGroupMultipleServerSingBoxLeastPing,
+                EMultipleLoad.Fallback => ResUI.menuGenGroupMultipleServerSingBoxFallback,
+                _ => ResUI.menuGenGroupMultipleServerSingBoxLeastPing,
+            };
         }
         var profile = new ProfileItem
         {

v2rayN/ServiceLib/Models/SingboxConfig.cs

@@ -145,6 +145,7 @@ public class Outbound4Sbox : BaseServer4Sbox
     public string? plugin_opts { get; set; }
     public List<string>? outbounds { get; set; }
     public bool? interrupt_exist_connections { get; set; }
+    public int? tolerance { get; set; }
 }
 
 public class Endpoints4Sbox : BaseServer4Sbox

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -987,6 +987,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Multi-Configuration Fallback by sing-box 的本地化字符串。
+        /// </summary>
+        public static string menuGenGroupMultipleServerSingBoxFallback {
+            get {
+                return ResourceManager.GetString("menuGenGroupMultipleServerSingBoxFallback", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Multi-Configuration LeastPing by sing-box 的本地化字符串。
         /// </summary>
@@ -996,6 +1005,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Multi-Configuration Fallback by Xray 的本地化字符串。
+        /// </summary>
+        public static string menuGenGroupMultipleServerXrayFallback {
+            get {
+                return ResourceManager.GetString("menuGenGroupMultipleServerXrayFallback", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Multi-Configuration LeastLoad by Xray 的本地化字符串。
         /// </summary>
@@ -2598,6 +2616,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Fallback 的本地化字符串。
+        /// </summary>
+        public static string TbFallback {
+            get {
+                return ResourceManager.GetString("TbFallback", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Fingerprint 的本地化字符串。
         /// </summary>

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

@@ -1554,4 +1554,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>Server List</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>Fallback</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by Xray</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.hu.resx

@@ -1554,4 +1554,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>Server List</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>Fallback</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by Xray</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1554,4 +1554,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>Server List</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>Fallback</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by Xray</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.ru.resx

@@ -1554,4 +1554,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>Server List</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>Fallback</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by Xray</value>
+  </data>
 </root>

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

@@ -1551,4 +1551,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>服务器列表</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>故障转移</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>多配置文件故障转移 sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>多配置文件故障转移 Xray</value>
+  </data>
 </root>

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

@@ -1551,4 +1551,13 @@
   <data name="menuServerList" xml:space="preserve">
     <value>Server List</value>
   </data>
+  <data name="TbFallback" xml:space="preserve">
+    <value>Fallback</value>
+  </data>
+  <data name="menuGenGroupMultipleServerSingBoxFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by sing-box</value>
+  </data>
+  <data name="menuGenGroupMultipleServerXrayFallback" xml:space="preserve">
+    <value>Multi-Configuration Fallback by Xray</value>
+  </data>
 </root>

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

@@ -36,7 +36,7 @@ public partial class CoreConfigSingboxService(Config config)
                 switch (node.ConfigType)
                 {
                     case EConfigType.PolicyGroup:
-                        return await GenerateClientMultipleLoadConfig(childProfiles);
+                        return await GenerateClientMultipleLoadConfig(childProfiles, profileGroupItem.MultipleLoad);
                     case EConfigType.ProxyChain:
                         return await GenerateClientChainConfig(childProfiles);
                 }
@@ -371,7 +371,7 @@ public partial class CoreConfigSingboxService(Config config)
         }
     }
 
-    public async Task<RetResult> GenerateClientMultipleLoadConfig(List<ProfileItem> selecteds)
+    public async Task<RetResult> GenerateClientMultipleLoadConfig(List<ProfileItem> selecteds, EMultipleLoad multipleLoad)
     {
         var ret = new RetResult();
         try
@@ -446,7 +446,7 @@ public partial class CoreConfigSingboxService(Config config)
                 ret.Msg = ResUI.FailedGenDefaultConfiguration;
                 return ret;
             }
-            await GenOutboundsList(proxyProfiles, singboxConfig);
+            await GenOutboundsList(proxyProfiles, singboxConfig, multipleLoad);
 
             await GenDns(null, singboxConfig);
             await ConvertGeo2Ruleset(singboxConfig);

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

@@ -410,7 +410,7 @@ public partial class CoreConfigSingboxService
         return 0;
     }
 
-    private async Task<int> GenOutboundsList(List<ProfileItem> nodes, SingboxConfig singboxConfig)
+    private async Task<int> GenOutboundsList(List<ProfileItem> nodes, SingboxConfig singboxConfig, EMultipleLoad multipleLoad)
     {
         try
         {
@@ -513,6 +513,11 @@ public partial class CoreConfigSingboxService
                     interrupt_exist_connections = false,
                 };
 
+                if (multipleLoad == EMultipleLoad.Fallback)
+                {
+                    outUrltest.tolerance = 5000;
+                }
+
                 // Add selector outbound (manual selection)
                 var outSelector = new Outbound4Sbox
                 {

v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayBalancerService.cs

@@ -15,7 +15,7 @@ public partial class CoreConfigV2rayService
             };
             v2rayConfig.observatory = observatory;
         }
-        else if (multipleLoad == EMultipleLoad.LeastLoad)
+        else if (multipleLoad is EMultipleLoad.LeastLoad or EMultipleLoad.Fallback)
         {
             var burstObservatory = new BurstObservatory4Ray
             {
@@ -41,7 +41,14 @@ public partial class CoreConfigV2rayService
         var balancer = new BalancersItem4Ray
         {
             selector = [Global.ProxyTag],
-            strategy = new() { type = strategyType },
+            strategy = new()
+            {
+                type = strategyType,
+                settings = new()
+                {
+                    expected = 1,
+                },
+            },
             tag = $"{Global.ProxyTag}-round",
         };
         v2rayConfig.routing.balancers = [balancer];

v2rayN/ServiceLib/ViewModels/AddGroupServerViewModel.cs

@@ -76,6 +76,7 @@ public class AddGroupServerViewModel : MyReactiveObject
         PolicyGroupType = (profileGroup?.MultipleLoad ?? EMultipleLoad.LeastPing) switch
         {
             EMultipleLoad.LeastPing => ResUI.TbLeastPing,
+            EMultipleLoad.Fallback => ResUI.TbFallback,
             EMultipleLoad.Random => ResUI.TbRandom,
             EMultipleLoad.RoundRobin => ResUI.TbRoundRobin,
             EMultipleLoad.LeastLoad => ResUI.TbLeastLoad,
@@ -206,6 +207,7 @@ public class AddGroupServerViewModel : MyReactiveObject
         profileGroup.MultipleLoad = PolicyGroupType switch
         {
             var s when s == ResUI.TbLeastPing => EMultipleLoad.LeastPing,
+            var s when s == ResUI.TbFallback => EMultipleLoad.Fallback,
             var s when s == ResUI.TbRandom => EMultipleLoad.Random,
             var s when s == ResUI.TbRoundRobin => EMultipleLoad.RoundRobin,
             var s when s == ResUI.TbLeastLoad => EMultipleLoad.LeastLoad,

v2rayN/ServiceLib/ViewModels/ProfilesViewModel.cs

@@ -57,7 +57,9 @@ public class ProfilesViewModel : MyReactiveObject
     public ReactiveCommand<Unit, Unit> GenGroupMultipleServerXrayRoundRobinCmd { get; }
     public ReactiveCommand<Unit, Unit> GenGroupMultipleServerXrayLeastPingCmd { get; }
     public ReactiveCommand<Unit, Unit> GenGroupMultipleServerXrayLeastLoadCmd { get; }
+    public ReactiveCommand<Unit, Unit> GenGroupMultipleServerXrayFallbackCmd { get; }
     public ReactiveCommand<Unit, Unit> GenGroupMultipleServerSingBoxLeastPingCmd { get; }
+    public ReactiveCommand<Unit, Unit> GenGroupMultipleServerSingBoxFallbackCmd { get; }
 
     //servers move
     public ReactiveCommand<Unit, Unit> MoveTopCmd { get; }
@@ -155,10 +157,18 @@ public class ProfilesViewModel : MyReactiveObject
         {
             await GenGroupMultipleServer(ECoreType.Xray, EMultipleLoad.LeastLoad);
         }, canEditRemove);
+        GenGroupMultipleServerXrayFallbackCmd = ReactiveCommand.CreateFromTask(async () =>
+        {
+            await GenGroupMultipleServer(ECoreType.Xray, EMultipleLoad.Fallback);
+        }, canEditRemove);
         GenGroupMultipleServerSingBoxLeastPingCmd = ReactiveCommand.CreateFromTask(async () =>
         {
             await GenGroupMultipleServer(ECoreType.sing_box, EMultipleLoad.LeastPing);
         }, canEditRemove);
+        GenGroupMultipleServerSingBoxFallbackCmd = ReactiveCommand.CreateFromTask(async () =>
+        {
+            await GenGroupMultipleServer(ECoreType.sing_box, EMultipleLoad.Fallback);
+        }, canEditRemove);
 
         //servers move
         MoveTopCmd = ReactiveCommand.CreateFromTask(async () =>

v2rayN/v2rayN.Desktop/Views/AddGroupServerWindow.axaml.cs

@@ -29,6 +29,7 @@ public partial class AddGroupServerWindow : WindowBase<AddGroupServerViewModel>
         cmbPolicyGroupType.ItemsSource = new List<string>
         {
             ResUI.TbLeastPing,
+            ResUI.TbFallback,
             ResUI.TbRandom,
             ResUI.TbRoundRobin,
             ResUI.TbLeastLoad,

v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml

@@ -106,6 +106,7 @@
                             <MenuItem x:Name="menuGenGroupMultipleServerXrayLeastLoad" Header="{x:Static resx:ResUI.menuGenGroupMultipleServerXrayLeastLoad}" />
                             <Separator />
                             <MenuItem x:Name="menuGenGroupMultipleServerSingBoxLeastPing" Header="{x:Static resx:ResUI.menuGenGroupMultipleServerSingBoxLeastPing}" />
+                            <MenuItem x:Name="menuGenGroupMultipleServerSingBoxFallback" Header="{x:Static resx:ResUI.menuGenGroupMultipleServerSingBoxFallback}" />
                         </MenuItem>
                         <Separator />
                         <MenuItem x:Name="menuMixedTestServer" Header="{x:Static resx:ResUI.menuMixedTestServer}" />

v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml.cs

@@ -73,6 +73,7 @@ public partial class ProfilesView : ReactiveUserControl<ProfilesViewModel>
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerXrayLeastPingCmd, v => v.menuGenGroupMultipleServerXrayLeastPing).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerXrayLeastLoadCmd, v => v.menuGenGroupMultipleServerXrayLeastLoad).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerSingBoxLeastPingCmd, v => v.menuGenGroupMultipleServerSingBoxLeastPing).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerSingBoxFallbackCmd, v => v.menuGenGroupMultipleServerSingBoxFallback).DisposeWith(disposables);
 
             //servers move
             //this.OneWayBind(ViewModel, vm => vm.SubItems, v => v.cmbMoveToGroup.ItemsSource).DisposeWith(disposables);

v2rayN/v2rayN/Views/AddGroupServerWindow.xaml.cs

@@ -24,6 +24,7 @@ public partial class AddGroupServerWindow
         cmbPolicyGroupType.ItemsSource = new List<string>
         {
             ResUI.TbLeastPing,
+            ResUI.TbFallback,
             ResUI.TbRandom,
             ResUI.TbRoundRobin,
             ResUI.TbLeastLoad,

v2rayN/v2rayN/Views/ProfilesView.xaml

@@ -147,6 +147,10 @@
                                 x:Name="menuGenGroupMultipleServerSingBoxLeastPing"
                                 Height="{StaticResource MenuItemHeight}"
                                 Header="{x:Static resx:ResUI.menuGenGroupMultipleServerSingBoxLeastPing}" />
+                            <MenuItem
+                                x:Name="menuGenGroupMultipleServerSingBoxFallback"
+                                Height="{StaticResource MenuItemHeight}"
+                                Header="{x:Static resx:ResUI.menuGenGroupMultipleServerSingBoxFallback}" />
                         </MenuItem>
                         <Separator />
                         <MenuItem

v2rayN/v2rayN/Views/ProfilesView.xaml.cs

@@ -67,6 +67,7 @@ public partial class ProfilesView
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerXrayLeastPingCmd, v => v.menuGenGroupMultipleServerXrayLeastPing).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerXrayLeastLoadCmd, v => v.menuGenGroupMultipleServerXrayLeastLoad).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerSingBoxLeastPingCmd, v => v.menuGenGroupMultipleServerSingBoxLeastPing).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.GenGroupMultipleServerSingBoxFallbackCmd, v => v.menuGenGroupMultipleServerSingBoxFallback).DisposeWith(disposables);
 
             //servers move
             this.OneWayBind(ViewModel, vm => vm.SubItems, v => v.cmbMoveToGroup.ItemsSource).DisposeWith(disposables);