From 4a876557b7f02230f70d95e6d53b22cd64b0fae2 Mon Sep 17 00:00:00 2001
From: Shreyas Zare <shreyas@technitium.com>
Date: Sat, 27 Feb 2021 19:22:30 +0530
Subject: [PATCH] added ApplicationZone

---
 DnsServerCore/Dns/Zones/ApplicationZone.cs | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 DnsServerCore/Dns/Zones/ApplicationZone.cs

diff --git a/DnsServerCore/Dns/Zones/ApplicationZone.cs b/DnsServerCore/Dns/Zones/ApplicationZone.cs
new file mode 100644
index 00000000..83ce1efa
--- /dev/null
+++ b/DnsServerCore/Dns/Zones/ApplicationZone.cs
@@ -0,0 +1,86 @@
+/*
+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;
+using System.Collections.Generic;
+using TechnitiumLibrary.Net.Dns;
+using TechnitiumLibrary.Net.Dns.ResourceRecords;
+
+namespace DnsServerCore.Dns.Zones
+{
+    class ApplicationZone : AuthZone
+    {
+        #region constructor
+
+        public ApplicationZone(AuthZoneInfo zoneInfo)
+            : base(zoneInfo.Name)
+        {
+            _disabled = zoneInfo.Disabled;
+        }
+
+        public ApplicationZone(string name, string package, string classPath, string data)
+            : base(name)
+        {
+            DnsResourceRecord appRecord = new DnsResourceRecord(name, DnsResourceRecordType.APP, DnsClass.IN, 60, new DnsApplicationRecord(package, classPath, data));
+
+            _entries[DnsResourceRecordType.APP] = new DnsResourceRecord[] { appRecord };
+        }
+
+        #endregion
+
+        #region public
+
+        public override void SetRecords(DnsResourceRecordType type, IReadOnlyList<DnsResourceRecord> records)
+        {
+            switch (type)
+            {
+                case DnsResourceRecordType.CNAME:
+                    throw new InvalidOperationException("Cannot set CNAME record to zone root.");
+
+                case DnsResourceRecordType.NS:
+                    throw new InvalidOperationException("Cannot set NS record to application zone root.");
+
+                case DnsResourceRecordType.SOA:
+                    throw new InvalidOperationException("Cannot set SOA record to application zone root.");
+
+                default:
+                    base.SetRecords(type, records);
+                    break;
+            }
+        }
+
+        public override void AddRecord(DnsResourceRecord record)
+        {
+            switch (record.Type)
+            {
+                case DnsResourceRecordType.APP:
+                    throw new InvalidOperationException("Cannot add record: use SetRecords() for " + record.Type.ToString() + " record");
+
+                case DnsResourceRecordType.NS:
+                    throw new InvalidOperationException("Cannot add NS record at application zone root.");
+
+                default:
+                    base.AddRecord(record);
+                    break;
+            }
+        }
+
+        #endregion
+    }
+}