Fixes DNS (#7757)

* Adds properties

* Adds DNS routing

v2rayN/ServiceLib/Global.cs

@@ -48,6 +48,7 @@ public class Global
     public const string ProxyTag = "proxy";
     public const string DirectTag = "direct";
     public const string BlockTag = "block";
+    public const string DnsTag = "dns-module";
     public const string StreamSecurity = "tls";
     public const string StreamSecurityReality = "reality";
     public const string Loopback = "127.0.0.1";

v2rayN/ServiceLib/Models/V2rayConfig.cs

@@ -203,8 +203,15 @@ public class Response4Ray
 
 public class Dns4Ray
 {
-    public Dictionary<string, List<string>>? hosts { get; set; }
+    public Dictionary<string, object>? hosts { get; set; }
     public List<object> servers { get; set; }
+    public string? clientIp { get; set; }
+    public string? queryStrategy { get; set; }
+    public bool? disableCache { get; set; }
+    public bool? disableFallback { get; set; }
+    public bool? disableFallbackIfMatch { get; set; }
+    public bool? useSystemHosts { get; set; }
+    public string? tag { get; set; }
 }
 
 public class DnsServer4Ray
@@ -214,6 +221,12 @@ public class DnsServer4Ray
     public bool? skipFallback { get; set; }
     public List<string>? expectedIPs { get; set; }
     public List<string>? unexpectedIPs { get; set; }
+    public string? clientIp { get; set; }
+    public string? queryStrategy { get; set; }
+    public int? timeoutMs { get; set; }
+    public bool? disableCache { get; set; }
+    public bool? finalQuery { get; set; }
+    public string? tag { get; set; }
 }
 
 public class Routing4Ray

v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs

@@ -1143,7 +1143,21 @@ public class CoreConfigV2rayService
             var item = await AppHandler.Instance.GetDNSItem(ECoreType.Xray);
             if (item != null && item.Enabled == true)
             {
-                return await GenDnsCompatible(node, v2rayConfig);
+                var result = await GenDnsCompatible(node, v2rayConfig);
+
+                if (v2rayConfig.routing.domainStrategy == "IPIfNonMatch")
+                {
+                    // DNS routing
+                    v2rayConfig.dns.tag = Global.DnsTag;
+                    v2rayConfig.routing.rules.Add(new RulesItem4Ray
+                    {
+                        type = "field",
+                        inboundTag = new List<string> { Global.DnsTag },
+                        outboundTag = Global.ProxyTag,
+                    });
+                }
+
+                return result;
             }
             var simpleDNSItem = _config.SimpleDNSItem;
             var domainStrategy4Freedom = simpleDNSItem?.RayStrategy4Freedom;
@@ -1164,6 +1178,18 @@ public class CoreConfigV2rayService
 
             await GenDnsServers(node, v2rayConfig, simpleDNSItem);
             await GenDnsHosts(v2rayConfig, simpleDNSItem);
+
+            if (v2rayConfig.routing.domainStrategy == "IPIfNonMatch")
+            {
+                // DNS routing
+                v2rayConfig.dns.tag = Global.DnsTag;
+                v2rayConfig.routing.rules.Add(new RulesItem4Ray
+                {
+                    type = "field",
+                    inboundTag = new List<string> { Global.DnsTag },
+                    outboundTag = Global.ProxyTag,
+                });
+            }
         }
         catch (Exception ex)
         {
@@ -1340,10 +1366,13 @@ public class CoreConfigV2rayService
             return await Task.FromResult(0);
         }
         v2rayConfig.dns ??= new Dns4Ray();
-        v2rayConfig.dns.hosts ??= new Dictionary<string, List<string>>();
+        v2rayConfig.dns.hosts ??= new Dictionary<string, object>();
         if (simpleDNSItem.AddCommonHosts == true)
         {
-            v2rayConfig.dns.hosts = Global.PredefinedHosts;
+            v2rayConfig.dns.hosts = Global.PredefinedHosts.ToDictionary(
+                kvp => kvp.Key,
+                kvp => (object)kvp.Value
+            );
         }
 
         if (simpleDNSItem.UseSystemHosts == true)