added WildIpApp

2026-03-23 14:00:02 +00:00 · 2022-09-24 12:10:12 +05:30
parent 2ba4d5b3f5
commit b9d4efe517
4 changed files with 165 additions and 0 deletions
--- a/Apps/WildIpApp/App.cs
+++ b/Apps/WildIpApp/App.cs
@@ -0,0 +1,119 @@
+/*
+Technitium DNS Server
+Copyright (C) 2022  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 DnsServerCore.ApplicationCommon;
+using System;
+using System.Net;
+using System.Threading.Tasks;
+using TechnitiumLibrary.Net.Dns;
+using TechnitiumLibrary.Net.Dns.ResourceRecords;
+
+namespace WildIp
+{
+    public class App : IDnsApplication, IDnsAppRecordRequestHandler
+    {
+        #region IDisposable
+
+        public void Dispose()
+        {
+            //do nothing
+        }
+
+        #endregion
+
+        #region public
+
+        public Task InitializeAsync(IDnsServer dnsServer, string config)
+        {
+            //do nothing
+            return Task.CompletedTask;
+        }
+
+        public Task<DnsDatagram> ProcessRequestAsync(DnsDatagram request, IPEndPoint remoteEP, DnsTransportProtocol protocol, bool isRecursionAllowed, string zoneName, string appRecordName, uint appRecordTtl, string appRecordData)
+        {
+            string qname = request.Question[0].Name;
+
+            if (qname.Length == appRecordName.Length)
+                return Task.FromResult<DnsDatagram>(null);
+
+            DnsResourceRecord answer;
+
+            switch (request.Question[0].Type)
+            {
+                case DnsResourceRecordType.A:
+                    {
+                        string subdomain = qname.Substring(0, qname.Length - appRecordName.Length);
+                        string[] parts = subdomain.Split(new char[] { '.', '-' }, StringSplitOptions.RemoveEmptyEntries);
+                        byte[] rawIp = new byte[4];
+                        int i = 0;
+
+                        for (int j = 0; (j < parts.Length) && (i < 4); j++)
+                        {
+                            if (byte.TryParse(parts[j], out byte x))
+                                rawIp[i++] = x;
+                        }
+
+                        if (i < 4)
+                            return Task.FromResult<DnsDatagram>(null);
+
+                        IPAddress address = new IPAddress(rawIp);
+
+                        answer = new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.A, DnsClass.IN, appRecordTtl, new DnsARecordData(address));
+                    }
+                    break;
+
+                case DnsResourceRecordType.AAAA:
+                    {
+                        string subdomain = qname.Substring(0, qname.Length - appRecordName.Length - 1);
+                        string[] parts = subdomain.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
+                        IPAddress address = null;
+
+                        foreach (string part in parts)
+                        {
+                            if (part.Contains('-') && IPAddress.TryParse(part.Replace('-', ':'), out address))
+                                break;
+                        }
+
+                        if (address is null)
+                            return Task.FromResult<DnsDatagram>(null);
+
+                        answer = new DnsResourceRecord(request.Question[0].Name, DnsResourceRecordType.AAAA, DnsClass.IN, appRecordTtl, new DnsAAAARecordData(address));
+                    }
+                    break;
+
+                default:
+                    return Task.FromResult<DnsDatagram>(null);
+            }
+
+            return Task.FromResult(new DnsDatagram(request.Identifier, true, request.OPCODE, true, false, request.RecursionDesired, isRecursionAllowed, false, false, DnsResponseCode.NoError, request.Question, new DnsResourceRecord[] { answer }));
+        }
+
+        #endregion
+
+        #region properties
+
+        public string Description
+        { get { return "Returns the IP address that was embedded in the subdomain name for A and AAAA queries. It works similar to sslip.io."; } }
+
+        public string ApplicationRecordDataTemplate
+        { get { return null; } }
+
+        #endregion
+    }
+}
--- a/Apps/WildIpApp/WildIpApp.csproj
+++ b/Apps/WildIpApp/WildIpApp.csproj
@@ -0,0 +1,38 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFramework>net6.0</TargetFramework>
+		<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+		<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
+		<Version>1.0</Version>
+		<Company>Technitium</Company>
+		<Product>Technitium DNS Server</Product>
+		<Authors>Shreyas Zare</Authors>
+		<AssemblyName>WildIpApp</AssemblyName>
+		<RootNamespace>WildIp</RootNamespace>
+		<PackageProjectUrl>https://technitium.com/dns/</PackageProjectUrl>
+		<RepositoryUrl>https://github.com/TechnitiumSoftware/DnsServer</RepositoryUrl>
+		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
+		<OutputType>Library</OutputType>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\..\DnsServerCore.ApplicationCommon\DnsServerCore.ApplicationCommon.csproj">
+			<Private>false</Private>
+		</ProjectReference>
+	</ItemGroup>
+
+	<ItemGroup>
+		<Reference Include="TechnitiumLibrary.Net">
+			<HintPath>..\..\..\TechnitiumLibrary\bin\TechnitiumLibrary.Net.dll</HintPath>
+			<Private>false</Private>
+		</Reference>
+	</ItemGroup>
+
+	<ItemGroup>
+		<None Update="dnsApp.config">
+			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+		</None>
+	</ItemGroup>
+
+</Project>
--- a/Apps/WildIpApp/dnsApp.config
+++ b/Apps/WildIpApp/dnsApp.config
@@ -0,0 +1 @@
+#This app requires no config.
--- a/DnsServer.sln
+++ b/DnsServer.sln
@@ -37,6 +37,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "NxDomainApp", "Apps\NxDomai
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BlockPageApp", "Apps\BlockPageApp\BlockPageApp.csproj", "{45C6F9AD-57D6-4D6D-9498-10B5C828E47E}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WildIpApp", "Apps\WildIpApp\WildIpApp.csproj", "{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -107,6 +109,10 @@ Global
 		{45C6F9AD-57D6-4D6D-9498-10B5C828E47E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{45C6F9AD-57D6-4D6D-9498-10B5C828E47E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{45C6F9AD-57D6-4D6D-9498-10B5C828E47E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -123,6 +129,7 @@ Global
 		{A4C31093-CA65-42D4-928A-11907076C0DE} = {938BF8EF-74B9-4FE0-B46F-11EBB7A4B3D2}
 		{BB0010FC-20E9-4397-BF9B-C9955D9AD339} = {938BF8EF-74B9-4FE0-B46F-11EBB7A4B3D2}
 		{45C6F9AD-57D6-4D6D-9498-10B5C828E47E} = {938BF8EF-74B9-4FE0-B46F-11EBB7A4B3D2}
+		{8B6BEB00-0AC2-4680-A848-31AD8A0FCD82} = {938BF8EF-74B9-4FE0-B46F-11EBB7A4B3D2}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {6747BB6D-2826-4356-A213-805FBCCF9201}