Fix

v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs

@@ -5,6 +5,39 @@ public record CoreConfigContextBuilderResult(CoreConfigContext Context, NodeVali
     public bool Success => ValidatorResult.Success;
 }
 
+/// <summary>
+/// Holds the results of a full context build, including the main context and an optional
+/// pre-socks context (e.g. for TUN protection or pre-socks chaining).
+/// </summary>
+public record CoreConfigContextBuilderAllResult(
+    CoreConfigContextBuilderResult MainResult,
+    CoreConfigContextBuilderResult? PreSocksResult)
+{
+    /// <summary>True only when both the main result and (if present) the pre-socks result succeeded.</summary>
+    public bool Success => MainResult.Success && (PreSocksResult?.Success ?? true);
+
+    /// <summary>
+    /// Merges all errors and warnings from the main result and the optional pre-socks result
+    /// into a single <see cref="NodeValidatorResult"/> for unified notification.
+    /// </summary>
+    public NodeValidatorResult CombinedValidatorResult => new(
+        [.. MainResult.ValidatorResult.Errors, .. PreSocksResult?.ValidatorResult.Errors ?? []],
+        [.. MainResult.ValidatorResult.Warnings, .. PreSocksResult?.ValidatorResult.Warnings ?? []]);
+
+    /// <summary>
+    /// The main context with TunProtectSsPort/ProxyRelaySsPort 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,
+            ProxyRelaySsPort = PreSocksResult.Context.ProxyRelaySsPort,
+            ProtectDomainList = [.. MainResult.Context.ProtectDomainList ?? [], .. PreSocksResult.Context.ProtectDomainList ?? []],
+        }
+        : MainResult.Context;
+}
+
 public class CoreConfigContextBuilder
 {
     /// <summary>
@@ -75,6 +108,79 @@ public static async Task<CoreConfigContextBuilderResult> Build(Config config, Pr
         return new CoreConfigContextBuilderResult(context, validatorResult);
     }
 
+    /// <summary>
+    /// Builds the main <see cref="CoreConfigContext"/> for <paramref name="node"/> and, when
+    /// the main build succeeds, also builds the optional pre-socks context required for TUN
+    /// protection or pre-socks proxy chaining.
+    /// </summary>
+    public static async Task<CoreConfigContextBuilderAllResult> BuildAll(Config config, ProfileItem node)
+    {
+        var mainResult = await Build(config, node);
+        if (!mainResult.Success)
+        {
+            return new CoreConfigContextBuilderAllResult(mainResult, null);
+        }
+
+        var preResult = await BuildPreSocksIfNeeded(mainResult.Context);
+        return new CoreConfigContextBuilderAllResult(mainResult, preResult);
+    }
+
+    /// <summary>
+    /// Determines whether a pre-socks context is required for <paramref name="nodeContext"/>
+    /// and, if so, builds and returns it. Returns <c>null</c> when no pre-socks core is needed.
+    /// </summary>
+    private static async Task<CoreConfigContextBuilderResult?> BuildPreSocksIfNeeded(CoreConfigContext nodeContext)
+    {
+        var config = nodeContext.AppConfig;
+        var node = nodeContext.Node;
+        var coreType = AppManager.Instance.GetCoreType(node, node.ConfigType);
+
+        var preSocksItem = ConfigHandler.GetPreSocksItem(config, node, coreType);
+        if (preSocksItem != null)
+        {
+            var preSocksResult = await Build(nodeContext.AppConfig, preSocksItem);
+            return preSocksResult with
+            {
+                Context = preSocksResult.Context with
+                {
+                    ProtectDomainList = [.. nodeContext.ProtectDomainList ?? [], .. preSocksResult.Context.ProtectDomainList ?? []],
+                }
+            };
+        }
+
+        if (!nodeContext.IsTunEnabled
+            || coreType != ECoreType.Xray
+            || node.ConfigType == EConfigType.Custom)
+        {
+            return null;
+        }
+
+        var tunProtectSsPort = Utils.GetFreePort();
+        var proxyRelaySsPort = Utils.GetFreePort();
+        var preItem = new ProfileItem()
+        {
+            CoreType = ECoreType.sing_box,
+            ConfigType = EConfigType.Shadowsocks,
+            Address = Global.Loopback,
+            Port = proxyRelaySsPort,
+            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,
+                ProxyRelaySsPort = proxyRelaySsPort,
+            }
+        };
+    }
+
     /// <summary>
     /// Resolves a node into the context, optionally wrapping it in a subscription-level proxy chain.
     /// Returns the effective (possibly replaced) node and the validation result.

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -1251,47 +1251,6 @@ public static async Task<RetResult> AddGroupServer4Multiple(Config config, List<
         return itemSocks;
     }
 
-    public static CoreConfigContext? GetPreSocksCoreConfigContext(CoreConfigContext nodeContext)
-    {
-        var config = nodeContext.AppConfig;
-        var node = nodeContext.Node;
-        var coreType = AppManager.Instance.GetCoreType(node, node.ConfigType);
-
-        var preSocksItem = GetPreSocksItem(config, node, coreType);
-        if (preSocksItem != null)
-        {
-            return nodeContext with { Node = preSocksItem, };
-        }
-
-        if ((!nodeContext.IsTunEnabled)
-            || coreType != ECoreType.Xray
-            || node.ConfigType == EConfigType.Custom)
-        {
-            return null;
-        }
-        var tunProtectSsPort = Utils.GetFreePort();
-        var proxyRelaySsPort = Utils.GetFreePort();
-        var preItem = new ProfileItem()
-        {
-            CoreType = ECoreType.sing_box,
-            ConfigType = EConfigType.Shadowsocks,
-            Address = Global.Loopback,
-            Port = proxyRelaySsPort,
-            Password = Global.None,
-        };
-        preItem.SetProtocolExtra(preItem.GetProtocolExtra() with
-        {
-            SsMethod = Global.None,
-        });
-        var preContext = nodeContext with
-        {
-            Node = preItem,
-            TunProtectSsPort = tunProtectSsPort,
-            ProxyRelaySsPort = proxyRelaySsPort,
-        };
-        return preContext;
-    }
-
     /// <summary>
     /// Remove servers with invalid test results (timeout)
     /// Useful for cleaning up subscription lists

v2rayN/ServiceLib/Manager/CoreManager.cs

@@ -57,27 +57,19 @@ public async Task Init(Config config, Func<bool, string, Task> updateFunc)
         }
     }
 
-    public async Task LoadCore(CoreConfigContext? context)
+    /// <param name="mainContext">Resolved main context (with pre-socks ports already merged if applicable).</param>
+    /// <param name="preContext">Optional pre-socks context passed to <see cref="CoreStartPreService"/>.</param>
+    public async Task LoadCore(CoreConfigContext? mainContext, CoreConfigContext? preContext)
     {
-        if (context == null)
+        if (mainContext == null)
         {
             await UpdateFunc(false, ResUI.CheckServerSettings);
             return;
         }
 
-        var contextMod = context;
-        var node = contextMod.Node;
+        var node = mainContext.Node;
         var fileName = Utils.GetBinConfigPath(Global.CoreConfigFileName);
-        var preContext = ConfigHandler.GetPreSocksCoreConfigContext(contextMod);
-        if (preContext is not null)
-        {
-            contextMod = contextMod with
-            {
-                TunProtectSsPort = preContext.TunProtectSsPort,
-                ProxyRelaySsPort = preContext.ProxyRelaySsPort,
-            };
-        }
-        var result = await CoreConfigHandler.GenerateClientConfig(contextMod, fileName);
+        var result = await CoreConfigHandler.GenerateClientConfig(mainContext, fileName);
         if (result.Success != true)
         {
             await UpdateFunc(true, result.Msg);
@@ -96,7 +88,7 @@ public async Task LoadCore(CoreConfigContext? context)
             await WindowsUtils.RemoveTunDevice();
         }
 
-        await CoreStart(contextMod);
+        await CoreStart(mainContext);
         await CoreStartPreService(preContext);
         if (_processService != null)
         {

v2rayN/ServiceLib/Manager/NoticeManager.cs

@@ -38,4 +38,25 @@ public void SendMessageAndEnqueue(string? msg)
         Enqueue(msg);
         SendMessage(msg);
     }
+
+    /// <summary>
+    /// Sends each error and warning in <paramref name="validatorResult"/> to the message panel
+    /// and enqueues a summary snack notification (capped at 10 messages).
+    /// Returns <c>true</c> when there were any messages so the caller can decide on early-return
+    /// based on <see cref="NodeValidatorResult.Success"/>.
+    /// </summary>
+    public bool NotifyValidatorResult(NodeValidatorResult validatorResult)
+    {
+        var msgs = new List<string>([.. validatorResult.Errors, .. validatorResult.Warnings]);
+        if (msgs.Count == 0)
+        {
+            return false;
+        }
+        foreach (var msg in msgs)
+        {
+            SendMessage(msg);
+        }
+        Enqueue(Utils.List2String(msgs.Take(10).ToList(), true));
+        return true;
+    }
 }

v2rayN/ServiceLib/ViewModels/MainWindowViewModel.cs

@@ -546,24 +546,15 @@ public async Task Reload()
                 NoticeManager.Instance.Enqueue(ResUI.CheckServerSettings);
                 return;
             }
-            var (context, validatorResult) = await CoreConfigContextBuilder.Build(_config, profileItem);
-            var msgs = new List<string>([..validatorResult.Errors, ..validatorResult.Warnings]);
-            if (msgs.Count > 0)
+            var allResult = await CoreConfigContextBuilder.BuildAll(_config, profileItem);
+            if (NoticeManager.Instance.NotifyValidatorResult(allResult.CombinedValidatorResult) && !allResult.Success)
             {
-                foreach (var msg in msgs)
-                {
-                    NoticeManager.Instance.SendMessage(msg);
-                }
-                NoticeManager.Instance.Enqueue(Utils.List2String(msgs.Take(10).ToList(), true));
-                if (!validatorResult.Success)
-                {
-                    return;
-                }
+                return;
             }
 
             await Task.Run(async () =>
             {
-                await LoadCore(context);
+                await LoadCore(allResult.ResolvedMainContext, allResult.PreSocksResult?.Context);
                 await SysProxyHandler.UpdateSysProxy(_config, false);
                 await Task.Delay(1000);
             });
@@ -604,9 +595,9 @@ private void SetReloadEnabled(bool enabled)
         RxApp.MainThreadScheduler.Schedule(() => BlReloadEnabled = enabled);
     }
 
-    private async Task LoadCore(CoreConfigContext? context)
+    private async Task LoadCore(CoreConfigContext? mainContext, CoreConfigContext? preContext)
     {
-        await CoreManager.Instance.LoadCore(context);
+        await CoreManager.Instance.LoadCore(mainContext, preContext);
     }
 
     #endregion core job

v2rayN/ServiceLib/ViewModels/ProfilesViewModel.cs

@@ -789,18 +789,9 @@ private async Task Export2ClientConfigAsync(bool blClipboard)
         }
 
         var (context, validatorResult) = await CoreConfigContextBuilder.Build(_config, item);
-        var msgs = new List<string>([..validatorResult.Errors, ..validatorResult.Warnings]);
-        if (msgs.Count > 0)
+        if (NoticeManager.Instance.NotifyValidatorResult(validatorResult) && !validatorResult.Success)
         {
-            foreach (var msg in msgs)
-            {
-                NoticeManager.Instance.SendMessage(msg);
-            }
-            NoticeManager.Instance.Enqueue(Utils.List2String(msgs.Take(10).ToList(), true));
-            if (!validatorResult.Success)
-            {
-                return;
-            }
+            return;
         }
 
         if (blClipboard)
@@ -829,18 +820,9 @@ public async Task Export2ClientConfigResult(string fileName, ProfileItem item)
             return;
         }
         var (context, validatorResult) = await CoreConfigContextBuilder.Build(_config, item);
-        var msgs = new List<string>([..validatorResult.Errors, ..validatorResult.Warnings]);
-        if (msgs.Count > 0)
+        if (NoticeManager.Instance.NotifyValidatorResult(validatorResult) && !validatorResult.Success)
         {
-            foreach (var msg in msgs)
-            {
-                NoticeManager.Instance.SendMessage(msg);
-            }
-            NoticeManager.Instance.Enqueue(Utils.List2String(msgs.Take(10).ToList(), true));
-            if (!validatorResult.Success)
-            {
-                return;
-            }
+            return;
         }
         var result = await CoreConfigHandler.GenerateClientConfig(context, fileName);
         if (result.Success != true)