From 2a3d91ef7a9655c30f87e6db1673da17319e0e24 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Felix=20Wei=C3=9F?= <72068105+Sandoun@users.noreply.github.com> Date: Mon, 1 Jan 2024 16:27:23 +0100 Subject: [PATCH] Intial --- .gitattributes | 63 ++++++ .gitignore | 400 +++++++++++++++++++++++++++++++++++ src/.dockerignore | 30 +++ src/DynDNSv2.sln | 25 +++ src/DynDNSv2/Dockerfile | 23 ++ src/DynDNSv2/DynDNSv2.csproj | 17 ++ src/DynDNSv2/IPTestResult.cs | 16 ++ src/DynDNSv2/Program.cs | 33 +++ src/DynDNSv2/Updater.cs | 244 +++++++++++++++++++++ 9 files changed, 851 insertions(+) create mode 100644 .gitattributes create mode 100644 .gitignore create mode 100644 src/.dockerignore create mode 100644 src/DynDNSv2.sln create mode 100644 src/DynDNSv2/Dockerfile create mode 100644 src/DynDNSv2/DynDNSv2.csproj create mode 100644 src/DynDNSv2/IPTestResult.cs create mode 100644 src/DynDNSv2/Program.cs create mode 100644 src/DynDNSv2/Updater.cs diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..1ff0c42 --- /dev/null +++ b/.gitattributes @@ -0,0 +1,63 @@ +############################################################################### +# Set default behavior to automatically normalize line endings. +############################################################################### +* text=auto + +############################################################################### +# Set default behavior for command prompt diff. +# +# This is need for earlier builds of msysgit that does not have it on by +# default for csharp files. +# Note: This is only used by command line +############################################################################### +#*.cs diff=csharp + +############################################################################### +# Set the merge driver for project and solution files +# +# Merging from the command prompt will add diff markers to the files if there +# are conflicts (Merging from VS is not affected by the settings below, in VS +# the diff markers are never inserted). Diff markers may cause the following +# file extensions to fail to load in VS. An alternative would be to treat +# these files as binary and thus will always conflict and require user +# intervention with every merge. To do so, just uncomment the entries below +############################################################################### +#*.sln merge=binary +#*.csproj merge=binary +#*.vbproj merge=binary +#*.vcxproj merge=binary +#*.vcproj merge=binary +#*.dbproj merge=binary +#*.fsproj merge=binary +#*.lsproj merge=binary +#*.wixproj merge=binary +#*.modelproj merge=binary +#*.sqlproj merge=binary +#*.wwaproj merge=binary + +############################################################################### +# behavior for image files +# +# image files are treated as binary by default. +############################################################################### +#*.jpg binary +#*.png binary +#*.gif binary + +############################################################################### +# diff behavior for common document formats +# +# Convert binary document formats to text before diffing them. This feature +# is only available from the command line. Turn it on by uncommenting the +# entries below. +############################################################################### +#*.doc diff=astextplain +#*.DOC diff=astextplain +#*.docx diff=astextplain +#*.DOCX diff=astextplain +#*.dot diff=astextplain +#*.DOT diff=astextplain +#*.pdf diff=astextplain +#*.PDF diff=astextplain +#*.rtf diff=astextplain +#*.RTF diff=astextplain diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..fcea1d7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,400 @@ +## Ignore Visual Studio temporary files, build results, and +## files generated by popular Visual Studio add-ons. +## +## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore + +launchSettings.json + +# User-specific files +*.rsuser +*.suo +*.user +*.userosscache +*.sln.docstates + +# User-specific files (MonoDevelop/Xamarin Studio) +*.userprefs + +# Mono auto generated files +mono_crash.* + +# Build results +[Dd]ebug/ +[Dd]ebugPublic/ +[Rr]elease/ +[Rr]eleases/ +x64/ +x86/ +[Ww][Ii][Nn]32/ +[Aa][Rr][Mm]/ +[Aa][Rr][Mm]64/ +bld/ +[Bb]in/ +[Oo]bj/ +[Ll]og/ +[Ll]ogs/ + +# Visual Studio 2015/2017 cache/options directory +.vs/ +# Uncomment if you have tasks that create the project's static files in wwwroot +#wwwroot/ + +# Visual Studio 2017 auto generated files +Generated\ Files/ + +# MSTest test Results +[Tt]est[Rr]esult*/ +[Bb]uild[Ll]og.* + +# NUnit +*.VisualState.xml +TestResult.xml +nunit-*.xml + +# Build Results of an ATL Project +[Dd]ebugPS/ +[Rr]eleasePS/ +dlldata.c + +# Benchmark Results +BenchmarkDotNet.Artifacts/ + +# .NET Core +project.lock.json +project.fragment.lock.json +artifacts/ + +# ASP.NET Scaffolding +ScaffoldingReadMe.txt + +# StyleCop +StyleCopReport.xml + +# Files built by Visual Studio +*_i.c +*_p.c +*_h.h +*.ilk +*.meta +*.obj +*.iobj +*.pch +*.pdb +*.ipdb +*.pgc +*.pgd +*.rsp +*.sbr +*.tlb +*.tli +*.tlh +*.tmp +*.tmp_proj +*_wpftmp.csproj +*.log +*.tlog +*.vspscc +*.vssscc +.builds +*.pidb +*.svclog +*.scc + +# Chutzpah Test files +_Chutzpah* + +# Visual C++ cache files +ipch/ +*.aps +*.ncb +*.opendb +*.opensdf +*.sdf +*.cachefile +*.VC.db +*.VC.VC.opendb + +# Visual Studio profiler +*.psess +*.vsp +*.vspx +*.sap + +# Visual Studio Trace Files +*.e2e + +# TFS 2012 Local Workspace +$tf/ + +# Guidance Automation Toolkit +*.gpState + +# ReSharper is a .NET coding add-in +_ReSharper*/ +*.[Rr]e[Ss]harper +*.DotSettings.user + +# TeamCity is a build add-in +_TeamCity* + +# DotCover is a Code Coverage Tool +*.dotCover + +# AxoCover is a Code Coverage Tool +.axoCover/* +!.axoCover/settings.json + +# Coverlet is a free, cross platform Code Coverage Tool +coverage*.json +coverage*.xml +coverage*.info + +# Visual Studio code coverage results +*.coverage +*.coveragexml + +# NCrunch +_NCrunch_* +.*crunch*.local.xml +nCrunchTemp_* + +# MightyMoose +*.mm.* +AutoTest.Net/ + +# Web workbench (sass) +.sass-cache/ + +# Installshield output folder +[Ee]xpress/ + +# DocProject is a documentation generator add-in +DocProject/buildhelp/ +DocProject/Help/*.HxT +DocProject/Help/*.HxC +DocProject/Help/*.hhc +DocProject/Help/*.hhk +DocProject/Help/*.hhp +DocProject/Help/Html2 +DocProject/Help/html + +# Click-Once directory +publish/ + +# Publish Web Output +*.[Pp]ublish.xml +*.azurePubxml +# Note: Comment the next line if you want to checkin your web deploy settings, +# but database connection strings (with potential passwords) will be unencrypted +*.pubxml +*.publishproj + +# Microsoft Azure Web App publish settings. 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Visual Studio LightSwitch build output +**/*.HTMLClient/GeneratedArtifacts +**/*.DesktopClient/GeneratedArtifacts +**/*.DesktopClient/ModelManifest.xml +**/*.Server/GeneratedArtifacts +**/*.Server/ModelManifest.xml +_Pvt_Extensions + +# Paket dependency manager +.paket/paket.exe +paket-files/ + +# FAKE - F# Make +.fake/ + +# CodeRush personal settings +.cr/personal + +# Python Tools for Visual Studio (PTVS) +__pycache__/ +*.pyc + +# Cake - Uncomment if you are using it +# tools/** +# !tools/packages.config + +# Tabs Studio +*.tss + +# Telerik's JustMock configuration file +*.jmconfig + +# BizTalk build output +*.btp.cs +*.btm.cs +*.odx.cs +*.xsd.cs + +# OpenCover UI analysis results +OpenCover/ + +# Azure Stream Analytics local run output +ASALocalRun/ + +# MSBuild Binary and Structured Log +*.binlog + +# NVidia Nsight GPU debugger configuration file +*.nvuser + +# MFractors (Xamarin productivity tool) working folder +.mfractor/ + +# Local History for Visual Studio +.localhistory/ + +# Visual Studio History (VSHistory) files +.vshistory/ + +# BeatPulse healthcheck temp database +healthchecksdb + +# Backup folder for Package Reference Convert tool in Visual Studio 2017 +MigrationBackup/ + +# Ionide (cross platform F# VS Code tools) working folder +.ionide/ + +# Fody - auto-generated XML schema +FodyWeavers.xsd + +# VS Code files for those working on multiple tools +.vscode/* +!.vscode/settings.json +!.vscode/tasks.json +!.vscode/launch.json +!.vscode/extensions.json +*.code-workspace + +# Local History for Visual Studio Code +.history/ + +# Windows Installer files from build outputs +*.cab +*.msi +*.msix +*.msm +*.msp + +# JetBrains Rider +*.sln.iml \ No newline at end of file diff --git a/src/.dockerignore b/src/.dockerignore new file mode 100644 index 0000000..fe1152b --- /dev/null +++ b/src/.dockerignore @@ -0,0 +1,30 @@ +**/.classpath +**/.dockerignore +**/.env +**/.git +**/.gitignore +**/.project +**/.settings +**/.toolstarget +**/.vs +**/.vscode +**/*.*proj.user +**/*.dbmdl +**/*.jfm +**/azds.yaml +**/bin +**/charts +**/docker-compose* +**/Dockerfile* +**/node_modules +**/npm-debug.log +**/obj +**/secrets.dev.yaml +**/values.dev.yaml +LICENSE +README.md +!**/.gitignore +!.git/HEAD +!.git/config +!.git/packed-refs +!.git/refs/heads/** \ No newline at end of file diff --git a/src/DynDNSv2.sln b/src/DynDNSv2.sln new file mode 100644 index 0000000..8caf6fa --- /dev/null +++ b/src/DynDNSv2.sln @@ -0,0 +1,25 @@ + +Microsoft Visual Studio Solution File, Format Version 12.00 +# Visual Studio Version 17 +VisualStudioVersion = 17.8.34309.116 +MinimumVisualStudioVersion = 10.0.40219.1 +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DynDNSv2", "DynDNSv2\DynDNSv2.csproj", "{92FB2846-1FDE-475E-B29F-32315BA30B0C}" +EndProject +Global + GlobalSection(SolutionConfigurationPlatforms) = preSolution + Debug|Any CPU = Debug|Any CPU + Release|Any CPU = Release|Any CPU + EndGlobalSection + GlobalSection(ProjectConfigurationPlatforms) = postSolution + {92FB2846-1FDE-475E-B29F-32315BA30B0C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {92FB2846-1FDE-475E-B29F-32315BA30B0C}.Debug|Any CPU.Build.0 = Debug|Any CPU + {92FB2846-1FDE-475E-B29F-32315BA30B0C}.Release|Any CPU.ActiveCfg = Release|Any CPU + {92FB2846-1FDE-475E-B29F-32315BA30B0C}.Release|Any CPU.Build.0 = Release|Any CPU + EndGlobalSection + GlobalSection(SolutionProperties) = preSolution + HideSolutionNode = FALSE + EndGlobalSection + GlobalSection(ExtensibilityGlobals) = postSolution + SolutionGuid = {5B07CCDA-2105-4E16-9ADF-77950F1724D9} + EndGlobalSection +EndGlobal diff --git a/src/DynDNSv2/Dockerfile b/src/DynDNSv2/Dockerfile new file mode 100644 index 0000000..5148a98 --- /dev/null +++ b/src/DynDNSv2/Dockerfile @@ -0,0 +1,23 @@ +#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging. + +FROM mcr.microsoft.com/dotnet/runtime:8.0 AS base +USER app +WORKDIR /app + +FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build +ARG BUILD_CONFIGURATION=Release +WORKDIR /src +COPY ["DynDNSv2/DynDNSv2.csproj", "DynDNSv2/"] +RUN dotnet restore "./DynDNSv2/./DynDNSv2.csproj" +COPY . . +WORKDIR "/src/DynDNSv2" +RUN dotnet build "./DynDNSv2.csproj" -c $BUILD_CONFIGURATION -o /app/build + +FROM build AS publish +ARG BUILD_CONFIGURATION=Release +RUN dotnet publish "./DynDNSv2.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false + +FROM base AS final +WORKDIR /app +COPY --from=publish /app/publish . +ENTRYPOINT ["dotnet", "DynDNSv2.dll"] \ No newline at end of file diff --git a/src/DynDNSv2/DynDNSv2.csproj b/src/DynDNSv2/DynDNSv2.csproj new file mode 100644 index 0000000..77ab1f0 --- /dev/null +++ b/src/DynDNSv2/DynDNSv2.csproj @@ -0,0 +1,17 @@ + + + + Exe + net8.0 + enable + enable + Linux + abe55787-bc11-416d-85aa-eaf544f21fe1 + + + + + + + + diff --git a/src/DynDNSv2/IPTestResult.cs b/src/DynDNSv2/IPTestResult.cs new file mode 100644 index 0000000..95c6117 --- /dev/null +++ b/src/DynDNSv2/IPTestResult.cs @@ -0,0 +1,16 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Net; +using System.Text; +using System.Threading.Tasks; + +namespace DynDNSv2; +internal record IPTestResult +{ + + public bool WasChanged { get; set; } + + public IPAddress? UpdatedIP { get; set; } + +} diff --git a/src/DynDNSv2/Program.cs b/src/DynDNSv2/Program.cs new file mode 100644 index 0000000..a723b19 --- /dev/null +++ b/src/DynDNSv2/Program.cs @@ -0,0 +1,33 @@ +using Microsoft.Extensions.DependencyInjection; +using Microsoft.Extensions.Hosting; +using Microsoft.Extensions.Logging; + +namespace DynDNSv2; + +internal class Program +{ + static void Main(string[] args) => Task.Run(AsyncMain).Wait(); + + static async Task AsyncMain() + { + + var builder = Host.CreateDefaultBuilder() + .ConfigureLogging(logging => + { + logging.AddSimpleConsole(settings => + { + settings.SingleLine = true; + }); + }) + .ConfigureServices(services => + { + services.AddHostedService(); + }); + + var host = builder.Build(); + + await host.RunAsync(); + + } + +} diff --git a/src/DynDNSv2/Updater.cs b/src/DynDNSv2/Updater.cs new file mode 100644 index 0000000..05af876 --- /dev/null +++ b/src/DynDNSv2/Updater.cs @@ -0,0 +1,244 @@ +using Microsoft.Extensions.Hosting; +using Microsoft.Extensions.Logging; +using System; +using System.Collections.Generic; +using System.Linq; +using System.Net; +using System.Net.Http.Headers; +using System.Text; +using System.Text.RegularExpressions; +using System.Threading.Tasks; + +namespace DynDNSv2; + +internal class Updater : BackgroundService +{ + + private string dynDnsUrl; + + private string username; + + private string password; + + private string[] updateDomains; + + private IPAddress lastPublicIp; + + private CancellationToken cToken; + + private ILogger logger; + + public Updater(ILogger logger) + { + + this.logger = logger; + lastPublicIp = IPAddress.Parse("127.0.0.1"); + + } + + protected override async Task ExecuteAsync(CancellationToken stoppingToken) + { + + cToken = stoppingToken; + + var _dynDNSUrl = Environment.GetEnvironmentVariable("UPDATE_URL"); + var _username = Environment.GetEnvironmentVariable("USERNAME"); + var _password = Environment.GetEnvironmentVariable("PASSWORD"); + + if (string.IsNullOrEmpty(_dynDNSUrl)) + throw new Exception("The UPDATE_URL env variable was not set"); + + if (string.IsNullOrEmpty(_username)) + throw new Exception("The USERNAME env variable was not set"); + + if (string.IsNullOrEmpty(_password)) + throw new Exception("The PASSWORD env variable was not set"); + + dynDnsUrl = _dynDNSUrl; + username = _username; + password = _password; + + var updateLst = new List(); + + int i = 1; + while(true) + { + var found = Environment.GetEnvironmentVariable($"UPDATE_URL_{i}"); + + if(!string.IsNullOrEmpty(found)) + { + updateLst.Add(found); + } else + { + break; + } + + i++; + + } + + if(updateLst.Count <= 0) + throw new Exception("No UPDATE_URL_[N] env variable found, pleace specify one with UPDATE_URL_1, UPDATE_URL_2 ..."); + + updateDomains = updateLst.ToArray(); + + await RunUpdaterAsync(); + + } + + private async Task RunUpdaterAsync() + { + + await RunIpTester(); + + } + + private async Task RunIpTester() + { + + while(!cToken.IsCancellationRequested) { + + var ipChangeResult = await CheckPublicIpAsync(); + + if (ipChangeResult.WasChanged) + { + logger.LogInformation("Public IP change detected"); + await RunDnsUpdateAsync(ipChangeResult.UpdatedIP!); + } + + await Task.Delay(5000); + + } + + } + + private async Task CheckPublicIpAsync() + { + + List services = new List() { + "https://ipv4.icanhazip.com", + "https://api.ipify.org", + "https://ipinfo.io/ip", + "https://checkip.amazonaws.com", + "https://wtfismyip.com/text", + "http://icanhazip.com" + }; + + using (var client = new HttpClient()) + { + + foreach (var service in services) + { + + try + { + + var str = await client.GetStringAsync(service); + var match = Regex.Match(str, @"(?:[0-9]{1,3}\.){3}[0-9]{1,3}"); + + if (match.Success) + { + str = match.Value; + } + + if (!IPAddress.TryParse(str, out var ip)) continue; + + if (ip.ToString() != lastPublicIp.ToString()) + { + + lastPublicIp = ip; + return new IPTestResult + { + WasChanged = true, + UpdatedIP = ip, + }; + + } + + return new IPTestResult + { + WasChanged = false, + }; + + } + catch { } + + } + + } + + throw new InvalidOperationException("The public ip could not be resolved"); + + } + + private async Task RunDnsUpdateAsync(IPAddress publicIp) + { + + using (var client = new HttpClient()) + { + + client.DefaultRequestHeaders.Add("User-Agent", "Server"); + + var byteArray = new UTF8Encoding().GetBytes($"{username}:{password}"); + client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray)); + + var hostNames = string.Join(",", updateDomains); + + var reqURL = $"{dynDnsUrl}?hostname={hostNames}&myip={publicIp}"; + + var result = await client.GetAsync(reqURL, cToken); + + if (result.IsSuccessStatusCode) + { + + string? responseStr = result.Content != null ? await result.Content.ReadAsStringAsync() : null; + + if (responseStr == null) + { + + logger.LogError("No response body"); + return; + + } + + responseStr = responseStr.Substring(0, responseStr.Length - 1); + + var updateMsgs = responseStr.Split("\n"); + + foreach (var msg in updateMsgs) + { + + var sb = new StringBuilder("DynDNS response from "); + + sb.Append($"[{reqURL}]: "); + sb.Append($"'{msg}', "); + sb.Append($"Code: {(int)result.StatusCode}"); + + if (msg.Contains("good") || msg.Contains("nochg")) + { + + logger.LogInformation($"Updated DNS: {msg}"); + + } + else + { + + logger.LogError($"DynDNS error response: {responseStr}"); + + } + + } + + } + else + { + + logger.LogError($"HTTP Error code: {result.StatusCode}"); + + } + + } + + } + +}