feat(send-through): 支持配置本地出站地址 (#8946)

* feat(send-through): 支持配置本地出站地址

为 Xray 增加 SendThrough 配置项，允许指定本机 IPv4 作为出站源地址。

- 在核心设置页新增 SendThrough 输入框及中英文提示文案
- 保存配置时校验并持久化本机 IPv4 地址
- 生成 Xray 配置时为所有 outbound 写入 sendThrough 字段

影响说明：
- 仅对 Xray 生效，留空时不设置该字段

* fix(send-through): limit sendThrough to remote egress outbounds

.github/workflows/build-linux.yml

@@ -47,7 +47,7 @@ jobs:
         dotnet publish ./AmazTool/AmazTool.csproj             -c Release -r linux-arm64 -p:SelfContained=true -p:PublishTrimmed=true -o "$OutputPathArm64"
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-linux
         path: |
@@ -116,7 +116,7 @@ jobs:
         ls -R "$GITHUB_WORKSPACE/dist/deb" || true
 
     - name: Upload DEB artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-deb
         path: dist/deb/**/*.deb
@@ -229,7 +229,7 @@ jobs:
         ls -R "$GITHUB_WORKSPACE/dist/rpm" || true
 
     - name: Upload RPM artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-rpm
         path: dist/rpm/**/*.rpm

.github/workflows/build-osx.yml

@@ -45,7 +45,7 @@ jobs:
         dotnet publish ./AmazTool/AmazTool.csproj             -c Release -r osx-arm64 -p:SelfContained=true -p:PublishTrimmed=true -o $OutputPathArm64
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-macos
         path: |

.github/workflows/build-windows-desktop.yml

@@ -45,7 +45,7 @@ jobs:
         dotnet publish ./AmazTool/AmazTool.csproj             -c Release -r win-arm64 -p:SelfContained=true -p:EnableWindowsTargeting=true -p:PublishTrimmed=true -o $OutputPathArm64
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-windows-desktop
         path: |

.github/workflows/build-windows.yml

@@ -42,7 +42,7 @@ jobs:
         dotnet publish ./AmazTool/AmazTool.csproj -c Release -r win-arm64 -p:SelfContained=true -p:EnableWindowsTargeting=true -p:PublishTrimmed=true -o $OutputPathArm64
   
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v7.0.0
+      uses: actions/upload-artifact@v7.0.1
       with:
         name: v2rayN-windows
         path: |

v2rayN/Directory.Packages.props

@@ -12,6 +12,7 @@
     <PackageVersion Include="ReactiveUI.Avalonia" Version="11.4.12" />
     <PackageVersion Include="CliWrap" Version="3.10.1" />
     <PackageVersion Include="Downloader" Version="5.1.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="H.NotifyIcon.Wpf" Version="2.4.1" />
     <PackageVersion Include="MaterialDesignThemes" Version="5.3.1" />
     <PackageVersion Include="MessageBox.Avalonia" Version="3.3.1.1" />
@@ -26,6 +27,8 @@
     <PackageVersion Include="sqlite-net-pcl" Version="1.9.172" />
     <PackageVersion Include="TaskScheduler" Version="2.12.2" />
     <PackageVersion Include="WebDav.Client" Version="2.9.0" />
+    <PackageVersion Include="xunit" Version="2.9.3" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
     <PackageVersion Include="YamlDotNet" Version="16.3.0" />
     <PackageVersion Include="ZXing.Net.Bindings.SkiaSharp" Version="0.16.14" />
   </ItemGroup>

v2rayN/ServiceLib.Tests/CoreConfigV2rayServiceTests.cs

@@ -0,0 +1,228 @@
+using System.Text.Json.Nodes;
+using ServiceLib;
+using ServiceLib.Enums;
+using ServiceLib.Models;
+using ServiceLib.Services.CoreConfig;
+using Xunit;
+
+namespace ServiceLib.Tests;
+
+public class CoreConfigV2rayServiceTests
+{
+    private const string SendThrough = "198.51.100.10";
+
+    [Fact]
+    public void GenerateClientConfigContent_OnlyAppliesSendThroughToRemoteProxyOutbounds()
+    {
+        var node = CreateProxyNode("proxy-1", "198.51.100.1", 443);
+        var service = new CoreConfigV2rayService(CreateContext(node));
+
+        var result = service.GenerateClientConfigContent();
+
+        Assert.True(result.Success);
+
+        var outbounds = GetOutbounds(result.Data?.ToString());
+        var proxyOutbound = outbounds.Single(outbound => outbound["tag"]!.GetValue<string>() == Global.ProxyTag);
+        var directOutbound = outbounds.Single(outbound => outbound["tag"]!.GetValue<string>() == Global.DirectTag);
+        var blockOutbound = outbounds.Single(outbound => outbound["tag"]!.GetValue<string>() == Global.BlockTag);
+
+        Assert.Equal(SendThrough, proxyOutbound["sendThrough"]?.GetValue<string>());
+        Assert.Null(directOutbound["sendThrough"]);
+        Assert.Null(blockOutbound["sendThrough"]);
+    }
+
+    [Fact]
+    public void GenerateClientConfigContent_OnlyAppliesSendThroughToChainExitOutbounds()
+    {
+        var exitNode = CreateProxyNode("exit", "198.51.100.2", 443);
+        var entryNode = CreateProxyNode("entry", "198.51.100.3", 443);
+        var chainNode = CreateChainNode("chain", exitNode, entryNode);
+
+        var service = new CoreConfigV2rayService(CreateContext(
+            chainNode,
+            allProxiesMap: new Dictionary<string, ProfileItem>
+            {
+                [exitNode.IndexId] = exitNode,
+                [entryNode.IndexId] = entryNode,
+            }));
+
+        var result = service.GenerateClientConfigContent();
+
+        Assert.True(result.Success);
+
+        var outbounds = GetOutbounds(result.Data?.ToString())
+            .Where(outbound => outbound["protocol"]?.GetValue<string>() is not ("freedom" or "blackhole" or "dns"))
+            .ToList();
+
+        var sendThroughOutbounds = outbounds
+            .Where(outbound => outbound["sendThrough"]?.GetValue<string>() == SendThrough)
+            .ToList();
+        var chainedOutbounds = outbounds
+            .Where(outbound => outbound["streamSettings"]?["sockopt"]?["dialerProxy"] is not null)
+            .ToList();
+
+        Assert.Single(sendThroughOutbounds);
+        Assert.All(chainedOutbounds, outbound => Assert.Null(outbound["sendThrough"]));
+    }
+
+    [Fact]
+    public void GenerateClientConfigContent_DoesNotApplySendThroughToTunRelayLoopbackOutbound()
+    {
+        var node = CreateProxyNode("proxy-1", "198.51.100.4", 443);
+        var config = CreateConfig();
+        config.TunModeItem.EnableLegacyProtect = false;
+
+        var service = new CoreConfigV2rayService(CreateContext(
+            node,
+            config,
+            isTunEnabled: true,
+            tunProtectSsPort: 10811,
+            proxyRelaySsPort: 10812));
+
+        var result = service.GenerateClientConfigContent();
+
+        Assert.True(result.Success);
+
+        var outbounds = GetOutbounds(result.Data?.ToString());
+        Assert.DoesNotContain(outbounds, outbound => outbound["sendThrough"]?.GetValue<string>() == SendThrough);
+    }
+
+    private static CoreConfigContext CreateContext(
+        ProfileItem node,
+        Config? config = null,
+        Dictionary<string, ProfileItem>? allProxiesMap = null,
+        bool isTunEnabled = false,
+        int tunProtectSsPort = 0,
+        int proxyRelaySsPort = 0)
+    {
+        return new CoreConfigContext
+        {
+            Node = node,
+            RunCoreType = ECoreType.Xray,
+            AppConfig = config ?? CreateConfig(),
+            AllProxiesMap = allProxiesMap ?? new(),
+            SimpleDnsItem = new SimpleDNSItem(),
+            IsTunEnabled = isTunEnabled,
+            TunProtectSsPort = tunProtectSsPort,
+            ProxyRelaySsPort = proxyRelaySsPort,
+        };
+    }
+
+    private static Config CreateConfig()
+    {
+        return new Config
+        {
+            IndexId = string.Empty,
+            SubIndexId = string.Empty,
+            CoreBasicItem = new()
+            {
+                LogEnabled = false,
+                Loglevel = "warning",
+                MuxEnabled = false,
+                DefAllowInsecure = false,
+                DefFingerprint = Global.Fingerprints.First(),
+                DefUserAgent = string.Empty,
+                SendThrough = SendThrough,
+                EnableFragment = false,
+                EnableCacheFile4Sbox = true,
+            },
+            TunModeItem = new()
+            {
+                EnableTun = false,
+                AutoRoute = true,
+                StrictRoute = true,
+                Stack = string.Empty,
+                Mtu = 9000,
+                EnableIPv6Address = false,
+                IcmpRouting = Global.TunIcmpRoutingPolicies.First(),
+                EnableLegacyProtect = false,
+            },
+            KcpItem = new(),
+            GrpcItem = new(),
+            RoutingBasicItem = new()
+            {
+                DomainStrategy = Global.DomainStrategies.First(),
+                DomainStrategy4Singbox = Global.DomainStrategies4Sbox.First(),
+                RoutingIndexId = string.Empty,
+            },
+            GuiItem = new(),
+            MsgUIItem = new(),
+            UiItem = new()
+            {
+                CurrentLanguage = "en",
+                CurrentFontFamily = string.Empty,
+                MainColumnItem = [],
+                WindowSizeItem = [],
+            },
+            ConstItem = new(),
+            SpeedTestItem = new(),
+            Mux4RayItem = new()
+            {
+                Concurrency = 8,
+                XudpConcurrency = 8,
+                XudpProxyUDP443 = "reject",
+            },
+            Mux4SboxItem = new()
+            {
+                Protocol = string.Empty,
+            },
+            HysteriaItem = new(),
+            ClashUIItem = new()
+            {
+                ConnectionsColumnItem = [],
+            },
+            SystemProxyItem = new(),
+            WebDavItem = new(),
+            CheckUpdateItem = new(),
+            Fragment4RayItem = null,
+            Inbound = [new InItem
+            {
+                Protocol = EInboundProtocol.socks.ToString(),
+                LocalPort = 10808,
+                UdpEnabled = true,
+                SniffingEnabled = true,
+                RouteOnly = false,
+            }],
+            GlobalHotkeys = [],
+            CoreTypeItem = [],
+            SimpleDNSItem = new(),
+        };
+    }
+
+    private static ProfileItem CreateProxyNode(string indexId, string address, int port)
+    {
+        return new ProfileItem
+        {
+            IndexId = indexId,
+            Remarks = indexId,
+            ConfigType = EConfigType.SOCKS,
+            CoreType = ECoreType.Xray,
+            Address = address,
+            Port = port,
+        };
+    }
+
+    private static ProfileItem CreateChainNode(string indexId, params ProfileItem[] nodes)
+    {
+        var chainNode = new ProfileItem
+        {
+            IndexId = indexId,
+            Remarks = indexId,
+            ConfigType = EConfigType.ProxyChain,
+            CoreType = ECoreType.Xray,
+        };
+        chainNode.SetProtocolExtra(new ProtocolExtraItem
+        {
+            ChildItems = string.Join(',', nodes.Select(node => node.IndexId)),
+        });
+        return chainNode;
+    }
+
+    private static List<JsonObject> GetOutbounds(string? json)
+    {
+        var root = JsonNode.Parse(json ?? throw new InvalidOperationException("Config JSON is missing"))?.AsObject()
+            ?? throw new InvalidOperationException("Failed to parse config JSON");
+        return root["outbounds"]?.AsArray().Select(node => node!.AsObject()).ToList()
+            ?? throw new InvalidOperationException("Config JSON does not contain outbounds");
+    }
+}

v2rayN/ServiceLib.Tests/ServiceLib.Tests.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="xunit" />
+    <PackageReference Include="xunit.runner.visualstudio">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ServiceLib\ServiceLib.csproj" />
+  </ItemGroup>
+
+</Project>

v2rayN/ServiceLib/Common/Utils.cs

@@ -522,6 +522,23 @@ public class Utils
         return false;
     }
 
+    public static bool IsIpv4(string? ip)
+    {
+        if (ip.IsNullOrEmpty())
+        {
+            return false;
+        }
+
+        ip = ip.Trim();
+        if (!IPAddress.TryParse(ip, out var address))
+        {
+            return false;
+        }
+
+        return address.AddressFamily == AddressFamily.InterNetwork
+               && ip.Count(c => c == '.') == 3;
+    }
+
     public static bool IsIpAddress(string? ip)
     {
         if (ip.IsNullOrEmpty())

v2rayN/ServiceLib/Global.cs

@@ -143,7 +143,7 @@ public class Global
         @"https://cachefly.cachefly.net/50mb.test",
         @"https://speed.cloudflare.com/__down?bytes=10000000",
         @"https://speed.cloudflare.com/__down?bytes=50000000",
-        @"https://speed.cloudflare.com/__down?bytes=100000000",
+        @"https://speed.cloudflare.com/__down?bytes=99999999",
     ];
 
     public static readonly List<string> SpeedPingTestUrls =

v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs

@@ -25,14 +25,14 @@ public record CoreConfigContextBuilderAllResult(
         [.. MainResult.ValidatorResult.Warnings, .. PreSocksResult?.ValidatorResult.Warnings ?? []]);
 
     /// <summary>
-    /// The main context with TunProtectSsPort/ProxyRelaySsPort and ProtectDomainList merged in
+    /// The main context with TunProtectSocksPort/ProxyRelaySocksPort and ProtectDomainList merged in
     /// from the pre-socks result (if any). Pass this to the core runner.
     /// </summary>
     public CoreConfigContext ResolvedMainContext => PreSocksResult is not null
         ? MainResult.Context with
         {
-            TunProtectSsPort = PreSocksResult.Context.TunProtectSsPort,
+            TunProtectSocksPort = PreSocksResult.Context.TunProtectSocksPort,
-            ProxyRelaySsPort = PreSocksResult.Context.ProxyRelaySsPort,
+            ProxyRelaySocksPort = PreSocksResult.Context.ProxyRelaySocksPort,
             ProtectDomainList = [.. MainResult.Context.ProtectDomainList ?? [], .. PreSocksResult.Context.ProtectDomainList ?? []],
         }
         : MainResult.Context;
@@ -58,8 +58,8 @@ public class CoreConfigContextBuilder
             IsTunEnabled = config.TunModeItem.EnableTun,
             SimpleDnsItem = config.SimpleDNSItem,
             ProtectDomainList = [],
-            TunProtectSsPort = 0,
+            TunProtectSocksPort = 0,
-            ProxyRelaySsPort = 0,
+            ProxyRelaySocksPort = 0,
             RawDnsItem = await AppManager.Instance.GetDNSItem(coreType),
             RoutingItem = await ConfigHandler.GetDefaultRouting(config),
         };
@@ -155,28 +155,23 @@ public class CoreConfigContextBuilder
             return null;
         }
 
-        var tunProtectSsPort = Utils.GetFreePort();
+        var tunProtectSocksPort = Utils.GetFreePort();
-        var proxyRelaySsPort = Utils.GetFreePort();
+        var proxyRelaySocksPort = Utils.GetFreePort();
         var preItem = new ProfileItem()
         {
             CoreType = ECoreType.sing_box,
-            ConfigType = EConfigType.Shadowsocks,
+            ConfigType = EConfigType.SOCKS,
             Address = Global.Loopback,
-            Port = proxyRelaySsPort,
+            Port = proxyRelaySocksPort,
-            Password = Global.None,
         };
-        preItem.SetProtocolExtra(preItem.GetProtocolExtra() with
-        {
-            SsMethod = Global.None,
-        });
         var preResult2 = await Build(nodeContext.AppConfig, preItem);
         return preResult2 with
         {
             Context = preResult2.Context with
             {
                 ProtectDomainList = [.. nodeContext.ProtectDomainList ?? [], .. preResult2.Context.ProtectDomainList ?? []],
-                TunProtectSsPort = tunProtectSsPort,
+                TunProtectSocksPort = tunProtectSocksPort,
-                ProxyRelaySsPort = proxyRelaySsPort,
+                ProxyRelaySocksPort = proxyRelaySocksPort,
             }
         };
     }

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -41,6 +41,7 @@ public static class ConfigHandler
             Loglevel = "warning",
             MuxEnabled = false,
         };
+        config.CoreBasicItem.SendThrough = config.CoreBasicItem.SendThrough?.TrimEx();
 
         if (config.Inbound == null)
         {

v2rayN/ServiceLib/Models/ConfigItems.cs

@@ -15,6 +15,8 @@ public class CoreBasicItem
 
     public string DefUserAgent { get; set; }
 
+    public string? SendThrough { get; set; }
+
     public bool EnableFragment { get; set; }
 
     public bool EnableCacheFile4Sbox { get; set; } = true;

v2rayN/ServiceLib/Models/CoreConfigContext.cs

@@ -20,6 +20,6 @@ public record CoreConfigContext
     // -> tun inbound --(if routing proxy)--> relay outbound
     // -> proxy core (relay inbound --> proxy outbound --(dialerProxy)--> protect outbound)
     // -> protect inbound -> direct proxy outbound data -> internet
-    public int TunProtectSsPort { get; init; } = 0;
+    public int TunProtectSocksPort { get; init; } = 0;
-    public int ProxyRelaySsPort { get; init; } = 0;
+    public int ProxyRelaySocksPort { get; init; } = 0;
 }

v2rayN/ServiceLib/Models/V2rayConfig.cs

@@ -105,6 +105,8 @@ public class Outbounds4Ray
 
     public string protocol { get; set; }
 
+    public string? sendThrough { get; set; }
+
     public string? targetStrategy { get; set; }
 
     public Outboundsettings4Ray settings { get; set; }

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -222,6 +222,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Please fill in the correct IPv4 address for SendThrough. 的本地化字符串。
+        /// </summary>
+        public static string FillCorrectSendThroughIPv4 {
+            get {
+                return ResourceManager.GetString("FillCorrectSendThroughIPv4", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Please enter the correct port format. 的本地化字符串。
         /// </summary>
@@ -4005,6 +4014,24 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Local outbound address (SendThrough) 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsSendThrough {
+            get {
+                return ResourceManager.GetString("TbSettingsSendThrough", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Only applies to Xray. Fill in a local IPv4 address; leave empty to disable. 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsSendThroughTip {
+            get {
+                return ResourceManager.GetString("TbSettingsSendThroughTip", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Enable Log 的本地化字符串。
         /// </summary>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1320,6 +1320,15 @@
   <data name="TbSettingsLinuxSudoPasswordTip" xml:space="preserve">
     <value>The password will be validated via the command line. If a validation error causes the application to malfunction, please restart the application. The password will not be stored and must be entered again after each restart.</value>
   </data>
+  <data name="TbSettingsSendThrough" xml:space="preserve">
+    <value>Local outbound address (SendThrough)</value>
+  </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>Only applies to Xray. Fill in a local IPv4 address; leave empty to disable.</value>
+  </data>
+  <data name="FillCorrectSendThroughIPv4" xml:space="preserve">
+    <value>Please fill in the correct IPv4 address for SendThrough.</value>
+  </data>
   <data name="TransportHeaderTypeTip5" xml:space="preserve">
     <value>*xhttp mode</value>
   </data>

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

@@ -1317,6 +1317,15 @@
   <data name="TbSettingsLinuxSudoPasswordTip" xml:space="preserve">
     <value>密码将调用命令行校验，如果因为校验错误导致无法正常运行时，请重启本应用。 密码不会存储，每次重启后都需要再次输入。</value>
   </data>
+  <data name="TbSettingsSendThrough" xml:space="preserve">
+    <value>本地出站地址 (SendThrough)</value>
+  </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>仅对 Xray 生效，填写本机 IPv4；留空则不设置。</value>
+  </data>
+  <data name="FillCorrectSendThroughIPv4" xml:space="preserve">
+    <value>请填写正确的 SendThrough IPv4 地址。</value>
+  </data>
   <data name="TransportHeaderTypeTip5" xml:space="preserve">
     <value>*XHTTP 模式</value>
   </data>

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

@@ -62,16 +62,23 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
 
             ret.Data = ApplyFullConfigTemplate();
             if (!context.AppConfig.TunModeItem.EnableLegacyProtect
-                && context.TunProtectSsPort is > 0 and <= 65535)
+                && context.TunProtectSocksPort is > 0 and <= 65535)
             {
+                // Replace relay proxy outbound, avoid mux or other feature cause issue, and add a socks inbound for tun protect
+                var relayProxyIndex = _coreConfig.outbounds.FindIndex(o => o.tag == Global.ProxyTag);
+                _coreConfig.outbounds[relayProxyIndex] = new Outbound4Sbox()
+                {
+                    type = Global.ProtocolTypes[EConfigType.SOCKS],
+                    tag = Global.ProxyTag,
+                    server = Global.Loopback,
+                    server_port = context.ProxyRelaySocksPort,
+                };
                 var ssInbound = new
                 {
-                    type = "shadowsocks",
+                    type = "socks",
-                    tag = "tun-protect-ss",
+                    tag = "tun-protect-socks",
                     listen = Global.Loopback,
-                    listen_port = context.TunProtectSsPort,
+                    listen_port = context.TunProtectSocksPort,
-                    method = "none",
-                    password = "none",
                 };
                 var directRule = new Rule4Sbox()
                 {

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

@@ -345,14 +345,6 @@ public partial class CoreConfigSingboxService
     {
         try
         {
-            // The synthetic TUN relay outbound talks to the local Xray shadowsocks relay.
-            // Xray cannot terminate sing-box h2mux, so muxing here turns local relay traffic
-            // into sp.mux.sing-box.arpa pseudo-destinations and breaks DNS over TUN.
-            if (IsTunRelayProxyOutbound())
-            {
-                return;
-            }
-
             var muxEnabled = _node.MuxEnabled ?? _config.CoreBasicItem.MuxEnabled;
             if (muxEnabled && _config.Mux4SboxItem.Protocol.IsNotEmpty())
             {
@@ -372,21 +364,6 @@ public partial class CoreConfigSingboxService
         }
     }
 
-    private bool IsTunRelayProxyOutbound()
-    {
-        if (!context.IsTunEnabled
-            || _node.ConfigType != EConfigType.Shadowsocks
-            || _node.Address != Global.Loopback
-            || _node.Port != context.ProxyRelaySsPort
-            || _node.Password != Global.None)
-        {
-            return false;
-        }
-
-        var protocolExtra = _node.GetProtocolExtra();
-        return protocolExtra.SsMethod == Global.None;
-    }
-
     private void FillOutboundTls(Outbound4Sbox outbound)
     {
         try

v2rayN/ServiceLib/Services/CoreConfig/V2ray/CoreConfigV2rayService.cs

@@ -17,8 +17,8 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
         {
             if (!context.AppConfig.TunModeItem.EnableLegacyProtect
                 && context.IsTunEnabled
-                && context.TunProtectSsPort is > 0 and <= 65535
+                && context.TunProtectSocksPort is > 0 and <= 65535
-                && context.ProxyRelaySsPort is > 0 and <= 65535)
+                && context.ProxyRelaySocksPort is > 0 and <= 65535)
             {
                 return GenerateClientProxyRelayConfig();
             }
@@ -62,6 +62,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
             GenDns();
 
             GenStatistic();
+            ApplyOutboundSendThrough();
 
             var finalRule = BuildFinalRule();
             if (!string.IsNullOrEmpty(finalRule?.balancerTag))
@@ -195,6 +196,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
                 _coreConfig.routing.rules.Add(rule);
             }
 
+            ApplyOutboundSendThrough();
             //ret.Msg =string.Format(ResUI.SuccessfulConfiguration"), node.getSummary());
             ret.Success = true;
             ret.Data = JsonUtils.Serialize(_coreConfig);
@@ -255,6 +257,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
             });
 
             _coreConfig.routing.rules.Add(BuildFinalRule());
+            ApplyOutboundSendThrough();
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
             ret.Success = true;
@@ -309,17 +312,16 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
             var protectNode = new ProfileItem()
             {
                 CoreType = ECoreType.Xray,
-                ConfigType = EConfigType.Shadowsocks,
+                ConfigType = EConfigType.SOCKS,
                 Address = Global.Loopback,
-                Port = context.TunProtectSsPort,
+                Port = context.TunProtectSocksPort,
-                Password = Global.None,
             };
             protectNode.SetProtocolExtra(protectNode.GetProtocolExtra() with
             {
                 SsMethod = Global.None,
             });
 
-            const string protectTag = "tun-protect-ss";
+            const string protectTag = "tun-protect-socks";
             foreach (var outbound in _coreConfig.outbounds
                 .Where(o => o.streamSettings?.sockopt?.dialerProxy?.IsNullOrEmpty() ?? true))
             {
@@ -368,7 +370,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
             var hasBalancer = _coreConfig.routing.balancers is { Count: > 0 };
             _coreConfig.routing.rules.Add(new()
             {
-                inboundTag = ["proxy-relay-ss"],
+                inboundTag = ["proxy-relay-socks"],
                 outboundTag = hasBalancer ? null : Global.ProxyTag,
                 balancerTag = hasBalancer ? Global.ProxyTag + Global.BalancerTagSuffix : null,
                 type = "field"
@@ -376,19 +378,19 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
 
             //_coreConfig.inbounds.Clear();
 
+            ApplyOutboundSendThrough();
             var configNode = JsonUtils.ParseJson(JsonUtils.Serialize(_coreConfig))!;
             configNode["inbounds"]!.AsArray().Add(new
             {
                 listen = Global.Loopback,
-                port = context.ProxyRelaySsPort,
+                port = context.ProxyRelaySocksPort,
-                protocol = "shadowsocks",
+                protocol = "socks",
                 settings = new
                 {
-                    network = "tcp,udp",
+                    auth = "noauth",
-                    method = Global.None,
+                    udp = true,
-                    password = Global.None,
                 },
-                tag = "proxy-relay-ss",
+                tag = "proxy-relay-socks",
             });
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
@@ -405,4 +407,43 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
     }
 
     #endregion public gen function
+
+    private void ApplyOutboundSendThrough()
+    {
+        var sendThrough = _config.CoreBasicItem.SendThrough?.TrimEx();
+        foreach (var outbound in _coreConfig.outbounds ?? [])
+        {
+            outbound.sendThrough = ShouldApplySendThrough(outbound, sendThrough) ? sendThrough : null;
+        }
+    }
+
+    private static bool ShouldApplySendThrough(Outbounds4Ray outbound, string? sendThrough)
+    {
+        if (sendThrough.IsNullOrEmpty())
+        {
+            return false;
+        }
+
+        if (outbound.protocol is "freedom" or "blackhole" or "dns" or "loopback")
+        {
+            return false;
+        }
+
+        if (outbound.streamSettings?.sockopt?.dialerProxy.IsNullOrEmpty() == false)
+        {
+            return false;
+        }
+
+        var outboundAddress = outbound.settings?.servers?.FirstOrDefault()?.address
+            ?? outbound.settings?.vnext?.FirstOrDefault()?.address
+            ?? outbound.settings?.address?.ToString()
+            ?? string.Empty;
+
+        if (outboundAddress.Equals("localhost", StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        return !IPAddress.TryParse(outboundAddress, out var address) || !IPAddress.IsLoopback(address);
+    }
 }

v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs

@@ -20,6 +20,7 @@ public class OptionSettingViewModel : MyReactiveObject
     [Reactive] public bool defAllowInsecure { get; set; }
     [Reactive] public string defFingerprint { get; set; }
     [Reactive] public string defUserAgent { get; set; }
+    [Reactive] public string sendThrough { get; set; }
     [Reactive] public string mux4SboxProtocol { get; set; }
     [Reactive] public bool enableCacheFile4Sbox { get; set; }
     [Reactive] public int? hyUpMbps { get; set; }
@@ -154,6 +155,7 @@ public class OptionSettingViewModel : MyReactiveObject
         defAllowInsecure = _config.CoreBasicItem.DefAllowInsecure;
         defFingerprint = _config.CoreBasicItem.DefFingerprint;
         defUserAgent = _config.CoreBasicItem.DefUserAgent;
+        sendThrough = _config.CoreBasicItem.SendThrough;
         mux4SboxProtocol = _config.Mux4SboxItem.Protocol;
         enableCacheFile4Sbox = _config.CoreBasicItem.EnableCacheFile4Sbox;
         hyUpMbps = _config.HysteriaItem.UpMbps;
@@ -297,6 +299,12 @@ public class OptionSettingViewModel : MyReactiveObject
             NoticeManager.Instance.Enqueue(ResUI.FillLocalListeningPort);
             return;
         }
+        var sendThroughValue = sendThrough?.TrimEx();
+        if (sendThroughValue.IsNotEmpty() && !Utils.IsIpv4(sendThroughValue))
+        {
+            NoticeManager.Instance.Enqueue(ResUI.FillCorrectSendThroughIPv4);
+            return;
+        }
         var needReboot = EnableStatistics != _config.GuiItem.EnableStatistics
                           || DisplayRealTimeSpeed != _config.GuiItem.DisplayRealTimeSpeed
                         || EnableDragDropSort != _config.UiItem.EnableDragDropSort
@@ -336,6 +344,7 @@ public class OptionSettingViewModel : MyReactiveObject
         _config.CoreBasicItem.DefAllowInsecure = defAllowInsecure;
         _config.CoreBasicItem.DefFingerprint = defFingerprint;
         _config.CoreBasicItem.DefUserAgent = defUserAgent;
+        _config.CoreBasicItem.SendThrough = sendThrough?.TrimEx();
         _config.Mux4SboxItem.Protocol = mux4SboxProtocol;
         _config.CoreBasicItem.EnableCacheFile4Sbox = enableCacheFile4Sbox;
         _config.HysteriaItem.UpMbps = hyUpMbps ?? 0;

v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml

@@ -325,6 +325,27 @@
                             Grid.Column="1"
                             Margin="{StaticResource Margin4}"
                             HorizontalAlignment="Left" />
+
+                        <TextBlock
+                            Grid.Row="21"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbSettingsSendThrough}" />
+                        <TextBox
+                            x:Name="txtsendThrough"
+                            Grid.Row="21"
+                            Grid.Column="1"
+                            Width="200"
+                            Margin="{StaticResource Margin4}"
+                            Watermark="0.0.0.0" />
+                        <TextBlock
+                            Grid.Row="21"
+                            Grid.Column="2"
+                            Margin="{StaticResource Margin4}"
+                            VerticalAlignment="Center"
+                            Text="{x:Static resx:ResUI.TbSettingsSendThroughTip}"
+                            TextWrapping="Wrap" />
                     </Grid>
                 </ScrollViewer>
             </TabItem>

v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml.cs

@@ -76,6 +76,7 @@ public partial class OptionSettingWindow : WindowBase<OptionSettingViewModel>
             this.Bind(ViewModel, vm => vm.defAllowInsecure, v => v.togdefAllowInsecure.IsChecked).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.defFingerprint, v => v.cmbdefFingerprint.SelectedValue).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.defUserAgent, v => v.cmbdefUserAgent.SelectedValue).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.sendThrough, v => v.txtsendThrough.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.mux4SboxProtocol, v => v.cmbmux4SboxProtocol.SelectedValue).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.enableCacheFile4Sbox, v => v.togenableCacheFile4Sbox.IsChecked).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.hyUpMbps, v => v.txtUpMbps.Text).DisposeWith(disposables);

v2rayN/v2rayN.sln

@@ -32,6 +32,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "GitHub Action", "GitHub Act
 		..\.github\workflows\winget-publish.yml = ..\.github\workflows\winget-publish.yml
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ServiceLib.Tests", "ServiceLib.Tests\ServiceLib.Tests.csproj", "{E0B6C5C7-ED48-42EB-947A-877779E9F555}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -58,6 +60,10 @@ Global
 		{CB3DE54F-3A26-AE02-1299-311132C32156}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{CB3DE54F-3A26-AE02-1299-311132C32156}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CB3DE54F-3A26-AE02-1299-311132C32156}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E0B6C5C7-ED48-42EB-947A-877779E9F555}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E0B6C5C7-ED48-42EB-947A-877779E9F555}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E0B6C5C7-ED48-42EB-947A-877779E9F555}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E0B6C5C7-ED48-42EB-947A-877779E9F555}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

v2rayN/v2rayN/Views/OptionSettingWindow.xaml

@@ -391,6 +391,30 @@
                             Grid.Column="1"
                             Margin="{StaticResource Margin8}"
                             HorizontalAlignment="Left" />
+
+                        <TextBlock
+                            Grid.Row="21"
+                            Grid.Column="0"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbSettingsSendThrough}" />
+                        <TextBox
+                            x:Name="txtsendThrough"
+                            Grid.Row="21"
+                            Grid.Column="1"
+                            Width="200"
+                            Margin="{StaticResource Margin8}"
+                            Style="{StaticResource DefTextBox}"
+                            materialDesign:HintAssist.Hint="0.0.0.0" />
+                        <TextBlock
+                            Grid.Row="21"
+                            Grid.Column="2"
+                            Margin="{StaticResource Margin8}"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource ToolbarTextBlock}"
+                            Text="{x:Static resx:ResUI.TbSettingsSendThroughTip}"
+                            TextWrapping="Wrap" />
                     </Grid>
                 </ScrollViewer>
             </TabItem>

v2rayN/v2rayN/Views/OptionSettingWindow.xaml.cs

@@ -73,6 +73,7 @@ public partial class OptionSettingWindow
             this.Bind(ViewModel, vm => vm.defAllowInsecure, v => v.togdefAllowInsecure.IsChecked).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.defFingerprint, v => v.cmbdefFingerprint.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.defUserAgent, v => v.cmbdefUserAgent.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.sendThrough, v => v.txtsendThrough.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.mux4SboxProtocol, v => v.cmbmux4SboxProtocol.Text).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.enableCacheFile4Sbox, v => v.togenableCacheFile4Sbox.IsChecked).DisposeWith(disposables);
             this.Bind(ViewModel, vm => vm.hyUpMbps, v => v.txtUpMbps.Text).DisposeWith(disposables);