added IDnsServer

DnsServerCore/Dns/Applications/IDnsServer.cs

@@ -0,0 +1,40 @@
+/*
+Technitium DNS Server
+Copyright (C) 2021  Shreyas Zare (shreyas@technitium.com)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+using System.Threading.Tasks;
+using TechnitiumLibrary.Net.Dns;
+using TechnitiumLibrary.Net.Proxy;
+
+namespace DnsServerCore.Dns
+{
+    public interface IDnsServer
+    {
+        Task<DnsDatagram> DirectQueryAsync(DnsQuestionRecord question, int timeout = 2000);
+
+        string ServerDomain { get; }
+
+        string PackageFolder { get; }
+
+        IDnsCache DnsCache { get; }
+
+        NetProxy Proxy { get; }
+
+        bool PreferIPv6 { get; }
+    }
+}