Add sing-box send-through (#9081)

* Add sing-box send-through

* Perf resx

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -4014,24 +4014,6 @@ 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>
@@ -4176,6 +4158,24 @@ 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 For multi-interface environments, enter the local machine&apos;s IPv4 address 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsSendThroughTip {
+            get {
+                return ResourceManager.GetString("TbSettingsSendThroughTip", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Set Win10 UWP Loopback 的本地化字符串。
         /// </summary>

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

@@ -1698,4 +1698,7 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Legacy TUN Protect</value>
   </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.fr.resx

@@ -1695,4 +1695,7 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Legacy TUN Protect</value>
   </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.hu.resx

@@ -1698,4 +1698,7 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Legacy TUN Protect</value>
   </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1324,7 +1324,7 @@
     <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>
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
   </data>
   <data name="FillCorrectSendThroughIPv4" xml:space="preserve">
     <value>Please fill in the correct IPv4 address for SendThrough.</value>
@@ -1707,4 +1707,4 @@ The "Get Certificate" action may fail if a self-signed certificate is used or if
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Legacy TUN Protect</value>
   </data>
-</root>
+</root>

v2rayN/ServiceLib/Resx/ResUI.ru.resx

@@ -1698,4 +1698,7 @@
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Устаревшая защита TUN (Legacy Protect)</value>
   </data>
-</root>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
+  </data>
+</root>

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

@@ -1321,7 +1321,7 @@
     <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>
+    <value>用于多网口环境，请填写本机 IPv4 地址</value>
   </data>
   <data name="FillCorrectSendThroughIPv4" xml:space="preserve">
     <value>请填写正确的 SendThrough IPv4 地址。</value>
@@ -1704,4 +1704,4 @@
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>旧版 TUN 保护</value>
   </data>
-</root>
+</root>

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

@@ -1695,4 +1695,7 @@
   <data name="TbLegacyProtect" xml:space="preserve">
     <value>Legacy TUN Protect</value>
   </data>
+  <data name="TbSettingsSendThroughTip" xml:space="preserve">
+    <value>For multi-interface environments, enter the local machine's IPv4 address</value>
+  </data>
 </root>

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

@@ -57,6 +57,8 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
 
             ConvertGeo2Ruleset();
 
+            ApplyOutboundSendThrough();
+
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
             ret.Success = true;
 
@@ -221,6 +223,7 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
                 _coreConfig.route.rules.Add(rule);
             }
 
+            ApplyOutboundSendThrough();
             ret.Success = true;
             ret.Data = JsonUtils.Serialize(_coreConfig);
             return ret;
@@ -279,6 +282,7 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
                 listen_port = port,
                 type = EInboundProtocol.mixed.ToString(),
             });
+            ApplyOutboundSendThrough();
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
             ret.Success = true;

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

@@ -58,4 +58,40 @@ public partial class CoreConfigSingboxService
 
         return JsonUtils.Serialize(fullConfigTemplateNode);
     }
+
+    private void ApplyOutboundSendThrough()
+    {
+        var sendThrough = _config.CoreBasicItem.SendThrough?.TrimEx();
+        foreach (var outbound in _coreConfig.outbounds ?? [])
+        {
+            outbound.inet4_bind_address = ShouldApplySendThrough(outbound, sendThrough) ? sendThrough : null;
+        }
+    }
+
+    private static bool ShouldApplySendThrough(Outbound4Sbox outbound, string? sendThrough)
+    {
+        if (sendThrough.IsNullOrEmpty())
+        {
+            return false;
+        }
+
+        if (outbound.type is "direct" or "block" or "dns" or "selector" or "urltest")
+        {
+            return false;
+        }
+
+        if (!outbound.detour.IsNullOrEmpty())
+        {
+            return false;
+        }
+
+        var outboundAddress = outbound.server ?? string.Empty;
+
+        if (outboundAddress.Equals("localhost", StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        return !IPAddress.TryParse(outboundAddress, out var address) || !IPAddress.IsLoopback(address);
+    }
 }

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

@@ -407,43 +407,4 @@ 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/Services/CoreConfig/V2ray/V2rayConfigTemplateService.cs

@@ -127,4 +127,43 @@ public partial class CoreConfigV2rayService
 
         return JsonUtils.Serialize(fullConfigTemplateNode);
     }
+
+    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/v2rayN.slnx

@@ -16,6 +16,7 @@
   </Folder>
   <Project Path="AmazTool/AmazTool.csproj" />
   <Project Path="GlobalHotKeys/src/GlobalHotKeys/GlobalHotKeys.csproj" />
+  <Project Path="ServiceLib.Tests/ServiceLib.Tests.csproj" />
   <Project Path="ServiceLib/ServiceLib.csproj" />
   <Project Path="v2rayN.Desktop/v2rayN.Desktop.csproj" />
   <Project Path="v2rayN/v2rayN.csproj" />