refactor: move IModeController.TestNatRequired to Mode

Netch/Controllers/HTTPController.cs

@@ -11,8 +11,6 @@ namespace Netch.Controllers
 {
     public class HTTPController : IModeController
     {
-        public bool TestNatRequired { get; } = false;
-
         public const string IEProxyExceptions = "localhost;127.*;10.*;172.16.*;172.17.*;172.18.*;172.19.*;172.20.*;172.21.*;172.22.*;172.23.*;172.24.*;172.25.*;172.26.*;172.27.*;172.28.*;172.29.*;172.30.*;172.31.*;192.168.*";
 
         public PrivoxyController pPrivoxyController = new PrivoxyController();

Netch/Controllers/IModeController.cs

@@ -11,7 +11,5 @@ namespace Netch.Controllers
         /// <param name="mode">模式</param>
         /// <returns>是否成功</returns>
         public abstract bool Start(Server s, Mode mode);
-
-        public abstract bool TestNatRequired { get; }
     }
 }

Netch/Controllers/MainController.cs

@@ -66,7 +66,7 @@ namespace Netch.Controllers
                     throw new StartFailedException();
                 }
 
-                if (ModeController?.TestNatRequired ?? false)
+                if (mode.TestNatRequired)
                     NatTest();
 
                 return true;

Netch/Controllers/NFController.cs

@@ -13,8 +13,6 @@ namespace Netch.Controllers
 {
     public class NFController : IModeController
     {
-        public bool TestNatRequired { get; } = true;
-
         private static readonly ServiceController NFService = new ServiceController("netfilter2");
 
         private static readonly string BinDriver = string.Empty;

Netch/Controllers/TUNTAPController.cs

@@ -17,8 +17,6 @@ namespace Netch.Controllers
 {
     public class TUNTAPController : Guard, IModeController
     {
-        public bool TestNatRequired { get; } = true;
-
         private Mode _savedMode = new Mode();
         private Server _savedServer = new Server();
 

Netch/Models/Mode.cs

@@ -39,6 +39,14 @@ namespace Netch.Models
             _ => false
         };
 
+        public bool TestNatRequired => Type switch
+        {
+            0 => true,
+            1 => true,
+            2 => true,
+            _ => false
+        };
+
         /// <summary>
         ///    绕过中国（0. 不绕过 1. 绕过）
         /// </summary>