├── .gitignore ├── DnsProxy.Service ├── App.config ├── DnsProxy.Service.csproj ├── Program.cs ├── ProjectInstaller.Designer.cs ├── ProjectInstaller.cs ├── ProjectInstaller.resx ├── Properties │ └── AssemblyInfo.cs ├── Service.Designer.cs ├── Service.cs ├── Service.resx ├── ServiceManager.cs ├── dns.ico └── packages.config ├── DnsProxy.SetupPackage ├── DnsProxy.SetupPackage.wixproj ├── Product.wxs └── packages.config ├── LICENSE ├── README.md └── hyperv-dnsproxy.sln /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | x64/ 19 | x86/ 20 | bld/ 21 | [Bb]in/ 22 | [Oo]bj/ 23 | 24 | # Visual Studio 2015 cache/options directory 25 | .vs/ 26 | # Uncomment if you have tasks that create the project's static files in wwwroot 27 | #wwwroot/ 28 | 29 | # MSTest test Results 30 | [Tt]est[Rr]esult*/ 31 | [Bb]uild[Ll]og.* 32 | 33 | # NUNIT 34 | *.VisualState.xml 35 | TestResult.xml 36 | 37 | # Build Results of an ATL Project 38 | [Dd]ebugPS/ 39 | [Rr]eleasePS/ 40 | dlldata.c 41 | 42 | # DNX 43 | project.lock.json 44 | artifacts/ 45 | 46 | *_i.c 47 | *_p.c 48 | *_i.h 49 | *.ilk 50 | *.meta 51 | *.obj 52 | *.pch 53 | *.pdb 54 | *.pgc 55 | *.pgd 56 | *.rsp 57 | *.sbr 58 | *.tlb 59 | *.tli 60 | *.tlh 61 | *.tmp 62 | *.tmp_proj 63 | *.log 64 | *.vspscc 65 | *.vssscc 66 | .builds 67 | *.pidb 68 | *.svclog 69 | *.scc 70 | 71 | # Chutzpah Test files 72 | _Chutzpah* 73 | 74 | # Visual C++ cache files 75 | ipch/ 76 | *.aps 77 | *.ncb 78 | *.opendb 79 | *.opensdf 80 | *.sdf 81 | *.cachefile 82 | 83 | # Visual Studio profiler 84 | *.psess 85 | *.vsp 86 | *.vspx 87 | *.sap 88 | 89 | # TFS 2012 Local Workspace 90 | $tf/ 91 | 92 | # Guidance Automation Toolkit 93 | *.gpState 94 | 95 | # ReSharper is a .NET coding add-in 96 | _ReSharper*/ 97 | *.[Rr]e[Ss]harper 98 | *.DotSettings.user 99 | 100 | # JustCode is a .NET coding add-in 101 | .JustCode 102 | 103 | # TeamCity is a build add-in 104 | _TeamCity* 105 | 106 | # DotCover is a Code Coverage Tool 107 | *.dotCover 108 | 109 | # NCrunch 110 | _NCrunch_* 111 | .*crunch*.local.xml 112 | nCrunchTemp_* 113 | 114 | # MightyMoose 115 | *.mm.* 116 | AutoTest.Net/ 117 | 118 | # Web workbench (sass) 119 | .sass-cache/ 120 | 121 | # Installshield output folder 122 | [Ee]xpress/ 123 | 124 | # DocProject is a documentation generator add-in 125 | DocProject/buildhelp/ 126 | DocProject/Help/*.HxT 127 | DocProject/Help/*.HxC 128 | DocProject/Help/*.hhc 129 | DocProject/Help/*.hhk 130 | DocProject/Help/*.hhp 131 | DocProject/Help/Html2 132 | DocProject/Help/html 133 | 134 | # Click-Once directory 135 | publish/ 136 | 137 | # Publish Web Output 138 | *.[Pp]ublish.xml 139 | *.azurePubxml 140 | # TODO: Comment the next line if you want to checkin your web deploy settings 141 | # but database connection strings (with potential passwords) will be unencrypted 142 | *.pubxml 143 | *.publishproj 144 | 145 | # NuGet Packages 146 | *.nupkg 147 | # The packages folder can be ignored because of Package Restore 148 | **/packages/* 149 | # except build/, which is used as an MSBuild target. 150 | !**/packages/build/ 151 | # Uncomment if necessary however generally it will be regenerated when needed 152 | #!**/packages/repositories.config 153 | # NuGet v3's project.json files produces more ignoreable files 154 | *.nuget.props 155 | *.nuget.targets 156 | 157 | # Microsoft Azure Build Output 158 | csx/ 159 | *.build.csdef 160 | 161 | # Microsoft Azure Emulator 162 | ecf/ 163 | rcf/ 164 | 165 | # Microsoft Azure ApplicationInsights config file 166 | ApplicationInsights.config 167 | 168 | # Windows Store app package directory 169 | AppPackages/ 170 | BundleArtifacts/ 171 | 172 | # Visual Studio cache files 173 | # files ending in .cache can be ignored 174 | *.[Cc]ache 175 | # but keep track of directories ending in .cache 176 | !*.[Cc]ache/ 177 | 178 | # Others 179 | ClientBin/ 180 | ~$* 181 | *~ 182 | *.dbmdl 183 | *.dbproj.schemaview 184 | *.publishsettings 185 | node_modules/ 186 | orleans.codegen.cs 187 | 188 | # RIA/Silverlight projects 189 | Generated_Code/ 190 | 191 | # Backup & report files from converting an old project file 192 | # to a newer Visual Studio version. Backup files are not needed, 193 | # because we have git ;-) 194 | _UpgradeReport_Files/ 195 | Backup*/ 196 | UpgradeLog*.XML 197 | UpgradeLog*.htm 198 | 199 | # SQL Server files 200 | *.mdf 201 | *.ldf 202 | 203 | # Business Intelligence projects 204 | *.rdl.data 205 | *.bim.layout 206 | *.bim_*.settings 207 | 208 | # Microsoft Fakes 209 | FakesAssemblies/ 210 | 211 | # GhostDoc plugin setting file 212 | *.GhostDoc.xml 213 | 214 | # Node.js Tools for Visual Studio 215 | .ntvs_analysis.dat 216 | 217 | # Visual Studio 6 build log 218 | *.plg 219 | 220 | # Visual Studio 6 workspace options file 221 | *.opt 222 | 223 | # Visual Studio LightSwitch build output 224 | **/*.HTMLClient/GeneratedArtifacts 225 | **/*.DesktopClient/GeneratedArtifacts 226 | **/*.DesktopClient/ModelManifest.xml 227 | **/*.Server/GeneratedArtifacts 228 | **/*.Server/ModelManifest.xml 229 | _Pvt_Extensions 230 | 231 | # Paket dependency manager 232 | .paket/paket.exe 233 | 234 | # FAKE - F# Make 235 | .fake/ 236 | -------------------------------------------------------------------------------- /DnsProxy.Service/App.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /DnsProxy.Service/DnsProxy.Service.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474} 8 | WinExe 9 | Properties 10 | DnsProxy 11 | DnsProxyService 12 | v4.6 13 | 512 14 | true 15 | publish\ 16 | true 17 | Disk 18 | false 19 | Foreground 20 | 7 21 | Days 22 | false 23 | false 24 | true 25 | 0 26 | 1.0.0.%2a 27 | false 28 | false 29 | true 30 | 31 | 32 | AnyCPU 33 | true 34 | full 35 | false 36 | bin\Debug\ 37 | DEBUG;TRACE 38 | prompt 39 | 4 40 | 41 | 42 | AnyCPU 43 | pdbonly 44 | true 45 | bin\Release\ 46 | TRACE 47 | prompt 48 | 4 49 | 50 | 51 | DnsProxy.Program 52 | 53 | 54 | 55 | ..\packages\ARSoft.Tools.Net.2.2.6\lib\net45\ARSoft.Tools.Net.dll 56 | True 57 | 58 | 59 | ..\packages\BouncyCastle.1.8.1\lib\BouncyCastle.Crypto.dll 60 | True 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | Component 73 | 74 | 75 | ProjectInstaller.cs 76 | 77 | 78 | Component 79 | 80 | 81 | Service.cs 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | ProjectInstaller.cs 93 | 94 | 95 | Service.cs 96 | 97 | 98 | 99 | 100 | False 101 | Microsoft .NET Framework 4.6 %28x86 and x64%29 102 | true 103 | 104 | 105 | False 106 | .NET Framework 3.5 SP1 107 | false 108 | 109 | 110 | 111 | 112 | Always 113 | 114 | 115 | 116 | 123 | -------------------------------------------------------------------------------- /DnsProxy.Service/Program.cs: -------------------------------------------------------------------------------- 1 | using System.ServiceProcess; 2 | 3 | namespace DnsProxy 4 | { 5 | static class Program 6 | { 7 | /// 8 | /// The main entry point for the application. 9 | /// 10 | static void Main() 11 | { 12 | #if !(DEBUG) 13 | ServiceBase[] ServicesToRun; 14 | ServicesToRun = new ServiceBase[] 15 | { 16 | new Service() 17 | }; 18 | ServiceBase.Run(ServicesToRun); 19 | #else 20 | var service = new Service(); 21 | service.DebugRun(new string[] { }); 22 | System.Threading.Thread.Sleep(System.Threading.Timeout.Infinite); 23 | #endif 24 | } 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /DnsProxy.Service/ProjectInstaller.Designer.cs: -------------------------------------------------------------------------------- 1 | namespace DnsProxy 2 | { 3 | partial class ProjectInstaller 4 | { 5 | /// 6 | /// Required designer variable. 7 | /// 8 | private System.ComponentModel.IContainer components = null; 9 | 10 | /// 11 | /// Clean up any resources being used. 12 | /// 13 | /// true if managed resources should be disposed; otherwise, false. 14 | protected override void Dispose(bool disposing) 15 | { 16 | if (disposing && (components != null)) 17 | { 18 | components.Dispose(); 19 | } 20 | base.Dispose(disposing); 21 | } 22 | 23 | #region Component Designer generated code 24 | 25 | /// 26 | /// Required method for Designer support - do not modify 27 | /// the contents of this method with the code editor. 28 | /// 29 | private void InitializeComponent() 30 | { 31 | this.serviceProcessInstaller1 = new System.ServiceProcess.ServiceProcessInstaller(); 32 | this.serviceInstaller1 = new System.ServiceProcess.ServiceInstaller(); 33 | // 34 | // serviceProcessInstaller1 35 | // 36 | this.serviceProcessInstaller1.Account = System.ServiceProcess.ServiceAccount.LocalSystem; 37 | this.serviceProcessInstaller1.Password = null; 38 | this.serviceProcessInstaller1.Username = null; 39 | // 40 | // serviceInstaller1 41 | // 42 | this.serviceInstaller1.Description = "This DNS service listens to the client requests and uses Host\'s resolver to retur" + 43 | "n responses. Used in conjunction with the NAT virtual switch for Hyper-V which d" + 44 | "oes not provide DNS resolution."; 45 | this.serviceInstaller1.DisplayName = "Dns Proxy For Hyper-V"; 46 | this.serviceInstaller1.ServiceName = "DnsProxy"; 47 | this.serviceInstaller1.StartType = System.ServiceProcess.ServiceStartMode.Automatic; 48 | // 49 | // ProjectInstaller 50 | // 51 | this.Installers.AddRange(new System.Configuration.Install.Installer[] { 52 | this.serviceProcessInstaller1, 53 | this.serviceInstaller1}); 54 | 55 | } 56 | 57 | #endregion 58 | 59 | private System.ServiceProcess.ServiceProcessInstaller serviceProcessInstaller1; 60 | private System.ServiceProcess.ServiceInstaller serviceInstaller1; 61 | } 62 | } -------------------------------------------------------------------------------- /DnsProxy.Service/ProjectInstaller.cs: -------------------------------------------------------------------------------- 1 | using System.ComponentModel; 2 | 3 | namespace DnsProxy 4 | { 5 | [RunInstaller(true)] 6 | public partial class ProjectInstaller : System.Configuration.Install.Installer 7 | { 8 | public ProjectInstaller() 9 | { 10 | InitializeComponent(); 11 | } 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /DnsProxy.Service/ProjectInstaller.resx: -------------------------------------------------------------------------------- 1 |  2 | 3 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | text/microsoft-resx 110 | 111 | 112 | 2.0 113 | 114 | 115 | System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 116 | 117 | 118 | System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 119 | 120 | 121 | 17, 17 122 | 123 | 124 | 229, 17 125 | 126 | 127 | False 128 | 129 | -------------------------------------------------------------------------------- /DnsProxy.Service/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.InteropServices; 3 | 4 | // General Information about an assembly is controlled through the following 5 | // set of attributes. Change these attribute values to modify the information 6 | // associated with an assembly. 7 | [assembly: AssemblyTitle("DnsProxy Service")] 8 | [assembly: AssemblyDescription("Windows service to respond to DNS requests from Hyper-V guests by using Host DNS resolver")] 9 | [assembly: AssemblyConfiguration("")] 10 | [assembly: AssemblyCompany("Roman Tumaykin")] 11 | [assembly: AssemblyProduct("DnsProxy Service For Hyper-V")] 12 | [assembly: AssemblyCopyright("Copyright © Roman Tumaykin 2016")] 13 | [assembly: AssemblyTrademark("")] 14 | [assembly: AssemblyCulture("")] 15 | 16 | // Setting ComVisible to false makes the types in this assembly not visible 17 | // to COM components. If you need to access a type in this assembly from 18 | // COM, set the ComVisible attribute to true on that type. 19 | [assembly: ComVisible(false)] 20 | 21 | // The following GUID is for the ID of the typelib if this project is exposed to COM 22 | [assembly: Guid("89d75cfc-27e7-4d7a-badf-dc4874bc5474")] 23 | 24 | // Version information for an assembly consists of the following four values: 25 | // 26 | // Major Version 27 | // Minor Version 28 | // Build Number 29 | // Revision 30 | // 31 | // You can specify all the values or you can default the Build and Revision Numbers 32 | // by using the '*' as shown below: 33 | // [assembly: AssemblyVersion("1.0.*")] 34 | [assembly: AssemblyVersion("1.3.0.0")] 35 | [assembly: AssemblyFileVersion("1.3.0.0")] 36 | -------------------------------------------------------------------------------- /DnsProxy.Service/Service.Designer.cs: -------------------------------------------------------------------------------- 1 | namespace DnsProxy 2 | { 3 | partial class Service 4 | { 5 | /// 6 | /// Required designer variable. 7 | /// 8 | private System.ComponentModel.IContainer components = null; 9 | 10 | /// 11 | /// Clean up any resources being used. 12 | /// 13 | /// true if managed resources should be disposed; otherwise, false. 14 | protected override void Dispose(bool disposing) 15 | { 16 | if (disposing && (components != null)) 17 | { 18 | components.Dispose(); 19 | } 20 | base.Dispose(disposing); 21 | } 22 | 23 | #region Component Designer generated code 24 | 25 | /// 26 | /// Required method for Designer support - do not modify 27 | /// the contents of this method with the code editor. 28 | /// 29 | private void InitializeComponent() 30 | { 31 | // 32 | // DnsProxy 33 | // 34 | this.ServiceName = "DnsProxy"; 35 | 36 | } 37 | 38 | #endregion 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /DnsProxy.Service/Service.cs: -------------------------------------------------------------------------------- 1 | using System.Collections.Generic; 2 | using System.Net; 3 | using System.ServiceProcess; 4 | using System.Threading.Tasks; 5 | using ARSoft.Tools.Net.Dns; 6 | 7 | namespace DnsProxy 8 | { 9 | public partial class Service : ServiceBase 10 | { 11 | public Service() 12 | { 13 | InitializeComponent(); 14 | } 15 | 16 | #if DEBUG 17 | public void DebugRun(string[] args) 18 | { 19 | OnStart(args); 20 | } 21 | #endif 22 | 23 | protected override void OnStart(string[] args) 24 | { 25 | ServiceManager.Start(); 26 | } 27 | 28 | protected override void OnPause() 29 | { 30 | ServiceManager.Stop(); 31 | } 32 | 33 | protected override void OnContinue() 34 | { 35 | ServiceManager.Start(); 36 | } 37 | 38 | protected override void OnStop() 39 | { 40 | ServiceManager.Stop(); 41 | } 42 | 43 | protected override void OnShutdown() 44 | { 45 | ServiceManager.Stop(); 46 | base.OnShutdown(); 47 | } 48 | } 49 | } 50 | -------------------------------------------------------------------------------- /DnsProxy.Service/Service.resx: -------------------------------------------------------------------------------- 1 |  2 | 3 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | text/microsoft-resx 110 | 111 | 112 | 2.0 113 | 114 | 115 | System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 116 | 117 | 118 | System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 119 | 120 | 121 | False 122 | 123 | -------------------------------------------------------------------------------- /DnsProxy.Service/ServiceManager.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Management; 5 | using System.Net; 6 | using System.Text.RegularExpressions; 7 | using System.Threading; 8 | using System.Threading.Tasks; 9 | using ARSoft.Tools.Net.Dns; 10 | 11 | namespace DnsProxy 12 | { 13 | public static class ServiceManager 14 | { 15 | #region Private variables 16 | 17 | private static readonly Dictionary Servers = new Dictionary(); 18 | 19 | private static Timer _scheduler; 20 | private static readonly object Lock = new object(); 21 | 22 | #endregion // Private variables 23 | 24 | #region WMI data retrievers 25 | 26 | private static IEnumerable GetNetworkInterfaceIpAddresses(uint[] virtualAdaptersInterfaceIds) 27 | { 28 | if (virtualAdaptersInterfaceIds == null || virtualAdaptersInterfaceIds.Length == 0) 29 | yield break; 30 | 31 | var scope = new ManagementScope(@"root\StandardCimv2"); 32 | var queryString = "SELECT * FROM MSFT_NetIPAddress WHERE " + 33 | string.Join(" OR ", virtualAdaptersInterfaceIds.Select(i => $"InterfaceIndex = {i}")); 34 | 35 | var query = new ObjectQuery(queryString); 36 | using (var searcher = new ManagementObjectSearcher(scope, query)) 37 | { 38 | using (var ipAddresses = searcher.Get()) 39 | { 40 | foreach (var ipAddress in ipAddresses) 41 | { 42 | yield return $"{ipAddress["IPAddress"]}/{ipAddress["PrefixLength"]}"; 43 | } 44 | } 45 | } 46 | } 47 | 48 | 49 | private static IEnumerable GetVirtualAdaptersInterfaceIds(string [] internalEthernetDeviceIds) 50 | { 51 | if (internalEthernetDeviceIds == null || internalEthernetDeviceIds.Length == 0) 52 | yield break; 53 | 54 | var scope = new ManagementScope(@"root\StandardCimv2"); 55 | var queryString = "SELECT * FROM MSFT_NetAdapter WHERE " + 56 | string.Join(" OR ", internalEthernetDeviceIds.Select(d => $"DeviceID = \"{{{d}}}\"")); 57 | 58 | var query = new ObjectQuery(queryString); 59 | using (var searcher = new ManagementObjectSearcher(scope, query)) 60 | { 61 | using (var virtualAdapters = searcher.Get()) 62 | { 63 | foreach (var virtualAdapter in virtualAdapters) 64 | { 65 | yield return (uint) virtualAdapter["InterfaceIndex"]; 66 | } 67 | } 68 | } 69 | } 70 | 71 | private static IEnumerable GetInternalEthernetDeviceIds() 72 | { 73 | var scope = new ManagementScope(@"root\virtualization\v2"); 74 | var query = new ObjectQuery("select * from Msvm_InternalEthernetPort"); 75 | using (var results = new ManagementObjectSearcher(scope, query)) 76 | { 77 | using (var internalEthernetPorts = results.Get()) 78 | { 79 | foreach (var internalEthernetPort in internalEthernetPorts) 80 | { 81 | var fullDeviceId = (string) internalEthernetPort["DeviceID"]; 82 | var foundMatches = Regex.Matches(fullDeviceId, 83 | @"[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}"); 84 | if (foundMatches.Count > 0) 85 | yield return foundMatches[0].Value; 86 | } 87 | } 88 | } 89 | } 90 | 91 | 92 | private static IEnumerable GetNatSubnets() 93 | { 94 | var scope = new ManagementScope(@"root\StandardCimv2"); 95 | var query = new ObjectQuery("SELECT * FROM MSFT_NetNat"); 96 | using (var searcher = new ManagementObjectSearcher(scope, query)) 97 | { 98 | using (var natObjects = searcher.Get()) 99 | { 100 | foreach (var natObject in natObjects) 101 | { 102 | if ((byte) natObject["Active"] == 1) 103 | { 104 | var subnet = (string) natObject["InternalIPInterfaceAddressPrefix"]; 105 | if (!string.IsNullOrWhiteSpace(subnet)) 106 | { 107 | yield return subnet; 108 | } 109 | } 110 | } 111 | } 112 | } 113 | } 114 | 115 | #endregion // WMI data retrievers 116 | 117 | 118 | #region Service Management Methods 119 | public static void Start() 120 | { 121 | 122 | _scheduler = new Timer(Cycle, null, 0, 15000); 123 | } 124 | 125 | 126 | private static void Cycle(object o) 127 | { 128 | 129 | lock (Lock) 130 | { 131 | var natSubnets = GetNatSubnets().ToArray(); 132 | var internalEthernetDeviceIds = GetInternalEthernetDeviceIds().ToArray(); 133 | var virtualAdaptersInterfaceIds = GetVirtualAdaptersInterfaceIds(internalEthernetDeviceIds).ToArray(); 134 | var networkInterfaceIpAddresses = GetNetworkInterfaceIpAddresses(virtualAdaptersInterfaceIds).ToArray(); 135 | var ipAddressesForBinding = GetIpAddressesForBinding(networkInterfaceIpAddresses, natSubnets).ToArray(); 136 | 137 | var currentlyBoundAddresses = Servers.Keys.ToArray(); 138 | 139 | foreach ( 140 | var ipAddressForBinding in 141 | ipAddressesForBinding.Where(a => !currentlyBoundAddresses.Contains(a))) 142 | { 143 | BindListener(ipAddressForBinding); 144 | } 145 | 146 | foreach ( 147 | var ipAddressForBinding in 148 | currentlyBoundAddresses.Where(a => !ipAddressesForBinding.Contains(a))) 149 | { 150 | UnBindListener(ipAddressForBinding); 151 | } 152 | } 153 | 154 | } 155 | 156 | 157 | private static void BindListener(string ipAddressForBinding) 158 | { 159 | IPAddress ip; 160 | 161 | if (!IPAddress.TryParse(ipAddressForBinding, out ip)) 162 | return; 163 | 164 | if (Servers.ContainsKey(ipAddressForBinding)) 165 | return; 166 | 167 | var dnsServer = new DnsServer(ip, 10, 10); 168 | dnsServer.QueryReceived += OnQueryReceived; 169 | Servers.Add(ipAddressForBinding, dnsServer); 170 | dnsServer.Start(); 171 | 172 | var appLog = new System.Diagnostics.EventLog {Source = "Hyper-V Dns Proxy"}; 173 | appLog.WriteEntry($"Started DNS Service on {ipAddressForBinding}"); 174 | } 175 | 176 | private static async Task OnQueryReceived(object sender, QueryReceivedEventArgs e) 177 | { 178 | var message = e.Query as DnsMessage; 179 | 180 | var response = message?.CreateResponseInstance(); 181 | 182 | if (message?.Questions.Count == 1) 183 | { 184 | // send query to upstream _servers 185 | var question = message.Questions[0]; 186 | 187 | var upstreamResponse = 188 | await DnsClient.Default.ResolveAsync(question.Name, question.RecordType, question.RecordClass); 189 | 190 | // if got an answer, copy it to the message sent to the client 191 | if (upstreamResponse != null) 192 | { 193 | foreach (var record in (upstreamResponse.AnswerRecords)) 194 | { 195 | response.AnswerRecords.Add(record); 196 | } 197 | foreach (var record in (upstreamResponse.AdditionalRecords)) 198 | { 199 | response.AdditionalRecords.Add(record); 200 | } 201 | 202 | response.ReturnCode = ReturnCode.NoError; 203 | 204 | // set the response 205 | e.Response = response; 206 | } 207 | } 208 | } 209 | 210 | private static void UnBindListener(string ipAddressForBinding) 211 | { 212 | DnsServer server; 213 | if (!Servers.TryGetValue(ipAddressForBinding, out server)) 214 | return; 215 | 216 | server.Stop(); 217 | Servers.Remove(ipAddressForBinding); 218 | var appLog = new System.Diagnostics.EventLog { Source = "Hyper-V Dns Proxy" }; 219 | appLog.WriteEntry($"Stopped DNS Service on {ipAddressForBinding}"); 220 | } 221 | 222 | 223 | private static IEnumerable GetIpAddressesForBinding(string[] networkInterfaceIpAddresses, string[] natSubnets) 224 | { 225 | if (networkInterfaceIpAddresses == null || natSubnets == null) 226 | yield break; 227 | 228 | foreach (var networkInterfaceIpAddress in networkInterfaceIpAddresses) 229 | { 230 | var ipParts = networkInterfaceIpAddress.Split('/'); 231 | var interfaceIp = BitConverter.ToInt32(IPAddress.Parse(ipParts[0]).GetAddressBytes(), 0); 232 | var interfaceMask = IPAddress.HostToNetworkOrder(-1 << (32 - int.Parse(ipParts[1]))); 233 | foreach (var natSubnet in natSubnets) 234 | { 235 | var subnetParts = natSubnet.Split('/'); 236 | var subnetIp = BitConverter.ToInt32(IPAddress.Parse(subnetParts[0]).GetAddressBytes(), 0); 237 | var subnetMask = IPAddress.HostToNetworkOrder(-1 << (32 - int.Parse(subnetParts[1]))); 238 | 239 | if ((interfaceIp & interfaceMask) == (subnetIp & subnetMask)) 240 | { 241 | yield return ipParts[0]; 242 | } 243 | 244 | } 245 | } 246 | } 247 | 248 | public static void Stop() 249 | { 250 | _scheduler.Dispose(); 251 | _scheduler = null; 252 | UnbindListeners(); 253 | } 254 | 255 | private static void UnbindListeners() 256 | { 257 | lock (Lock) 258 | { 259 | var ipAddressesForUnBinding = Servers.Keys.ToArray(); 260 | 261 | foreach (var ipAddressForUnbinding in ipAddressesForUnBinding) 262 | { 263 | UnBindListener(ipAddressForUnbinding); 264 | } 265 | } 266 | } 267 | 268 | #endregion // Service Management Methods 269 | } 270 | } 271 | -------------------------------------------------------------------------------- /DnsProxy.Service/dns.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/rtumaykin/hyperv-dnsproxy/075b416bb3e881939f098e30db27f02f294e5c75/DnsProxy.Service/dns.ico -------------------------------------------------------------------------------- /DnsProxy.Service/packages.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /DnsProxy.SetupPackage/DnsProxy.SetupPackage.wixproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | Debug 6 | x86 7 | 3.10 8 | 7de5a53a-646c-4cc7-9b04-caded8350296 9 | 2.0 10 | DnsProxy 11 | Package 12 | $(MSBuildExtensionsPath32)\Microsoft\WiX\v3.x\Wix.targets 13 | $(MSBuildExtensionsPath)\Microsoft\WiX\v3.x\Wix.targets 14 | 15 | 16 | 17 | 18 | bin\$(Configuration)\ 19 | obj\$(Configuration)\ 20 | Debug 21 | 22 | 23 | bin\$(Configuration)\ 24 | obj\$(Configuration)\ 25 | 26 | 27 | 28 | 29 | 30 | 31 | DnsProxy.Service 32 | {89d75cfc-27e7-4d7a-badf-dc4874bc5474} 33 | True 34 | True 35 | Binaries;Content;Satellites 36 | INSTALLFOLDER 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | ..\packages\WiX.3.10.3\tools\WixUIExtension.dll 45 | WixUIExtension 46 | 47 | 48 | ..\packages\WiX.3.10.3\tools\WixNetFxExtension.dll 49 | WixNetFxExtension 50 | 51 | 52 | 53 | 54 | 55 | This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}. 56 | 57 | 58 | 59 | 67 | -------------------------------------------------------------------------------- /DnsProxy.SetupPackage/Product.wxs: -------------------------------------------------------------------------------- 1 | 2 | 3 | 9 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 1 59 | "1"]]> 60 | 61 | 1 62 | 63 | NOT Installed 64 | Installed AND PATCH 65 | 66 | 1 67 | 1 68 | NOT WIXUI_DONTVALIDATEPATH 69 | "1"]]> 70 | WIXUI_DONTVALIDATEPATH OR WIXUI_INSTALLDIR_VALID="1" 71 | 1 72 | 1 73 | 74 | NOT Installed 75 | Installed AND NOT PATCH 76 | Installed AND PATCH 77 | 78 | 1 79 | 80 | 1 81 | 1 82 | 1 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 108 | 109 | 110 | 111 | 117 | 118 | 119 | 120 | -------------------------------------------------------------------------------- /DnsProxy.SetupPackage/packages.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # hyperv-dnsproxy 2 | This DNS service listens to the client requests and uses Host's resolver to return responses. Used in conjunction with the NAT virtual switch for Hyper-V which does not provide DNS resolution. 3 | -------------------------------------------------------------------------------- /hyperv-dnsproxy.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 14 4 | VisualStudioVersion = 14.0.24720.0 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DnsProxy.Service", "DnsProxy.Service\DnsProxy.Service.csproj", "{89D75CFC-27E7-4D7A-BADF-DC4874BC5474}" 7 | EndProject 8 | Project("{930C7802-8A8C-48F9-8165-68863BCCD9DD}") = "DnsProxy.SetupPackage", "DnsProxy.SetupPackage\DnsProxy.SetupPackage.wixproj", "{7DE5A53A-646C-4CC7-9B04-CADED8350296}" 9 | EndProject 10 | Global 11 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 12 | Debug|Any CPU = Debug|Any CPU 13 | Debug|x86 = Debug|x86 14 | Release|Any CPU = Release|Any CPU 15 | Release|x86 = Release|x86 16 | EndGlobalSection 17 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 18 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 19 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Debug|Any CPU.Build.0 = Debug|Any CPU 20 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Debug|x86.ActiveCfg = Debug|Any CPU 21 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Debug|x86.Build.0 = Debug|Any CPU 22 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Release|Any CPU.ActiveCfg = Release|Any CPU 23 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Release|Any CPU.Build.0 = Release|Any CPU 24 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Release|x86.ActiveCfg = Release|Any CPU 25 | {89D75CFC-27E7-4D7A-BADF-DC4874BC5474}.Release|x86.Build.0 = Release|Any CPU 26 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Debug|Any CPU.ActiveCfg = Debug|x86 27 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Debug|x86.ActiveCfg = Debug|x86 28 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Debug|x86.Build.0 = Debug|x86 29 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Release|Any CPU.ActiveCfg = Release|x86 30 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Release|x86.ActiveCfg = Release|x86 31 | {7DE5A53A-646C-4CC7-9B04-CADED8350296}.Release|x86.Build.0 = Release|x86 32 | EndGlobalSection 33 | GlobalSection(SolutionProperties) = preSolution 34 | HideSolutionNode = FALSE 35 | EndGlobalSection 36 | EndGlobal 37 | --------------------------------------------------------------------------------