Bug fix

Author: 2dust

v2rayN/v2rayN/Handler/CoreConfig/CoreConfigV2ray.cs

@@ -1,5 +1,6 @@
 using System.Net;
 using System.Net.NetworkInformation;
+using System.Text.Json.Nodes;
 using v2rayN.Enums;
 using v2rayN.Models;
 using v2rayN.Resx;
@@ -53,7 +54,7 @@ public int GenerateClientConfigContent(ProfileItem node, out V2rayConfig? v2rayC
 
                 GenMoreOutbounds(node, v2rayConfig);
 
-                GenDns(v2rayConfig);
+                GenDns(node, v2rayConfig);
 
                 GenStatistic(v2rayConfig);
 
@@ -748,7 +749,7 @@ private int GenBoundStreamSettings(ProfileItem node, StreamSettings4Ray streamSe
             return 0;
         }
 
-        private int GenDns(V2rayConfig v2rayConfig)
+        private int GenDns(ProfileItem node, V2rayConfig v2rayConfig)
         {
             try
             {
@@ -800,6 +801,8 @@ private int GenDns(V2rayConfig v2rayConfig)
                     }
                 }
 
+                GenDnsDomains(node, obj);
+
                 v2rayConfig.dns = obj;
             }
             catch (Exception ex)
@@ -809,6 +812,24 @@ private int GenDns(V2rayConfig v2rayConfig)
             return 0;
         }
 
+        private int GenDnsDomains(ProfileItem node, JsonNode dns)
+        {
+            var servers = dns["servers"];
+            if (servers != null)
+            {
+                if (Utils.IsDomain(node.address))
+                {
+                    var dnsServer = new DnsServer4Ray()
+                    {
+                        address = "223.5.5.5",
+                        domains = [node.address]
+                    };
+                    servers.AsArray().Insert(0, JsonUtils.SerializeToNode(dnsServer));
+                }
+            }
+            return 0;
+        }
+
         private int GenStatistic(V2rayConfig v2rayConfig)
         {
             if (_config.guiItem.enableStatistics)

v2rayN/v2rayN/Models/V2rayConfig.cs

@@ -370,6 +370,12 @@ public class Dns4Ray
         public List<string> servers { get; set; }
     }
 
+    public class DnsServer4Ray
+    {
+        public string? address { get; set; }
+        public List<string>? domains { get; set; }
+    }
+
     public class Routing4Ray
     {
         /// <summary>
@@ -380,7 +386,7 @@ public class Routing4Ray
         /// <summary>
         ///
         /// </summary>
-        public string domainMatcher { get; set; }
+        public string? domainMatcher { get; set; }
 
         /// <summary>
         ///