Init

.gitignore

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+.vs/
+bin/
+obj/

App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>

GiantsLauncher.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{C78FA352-3E44-40FD-854D-93A83520E801}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>GiantsLauncher</RootNamespace>
+    <AssemblyName>GiantsLauncher</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationIcon>giants_citizen_kabuto.ico</ApplicationIcon>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="giants_citizen_kabuto.ico" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

GiantsLauncher.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.329
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GiantsLauncher", "GiantsLauncher.csproj", "{C78FA352-3E44-40FD-854D-93A83520E801}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C78FA352-3E44-40FD-854D-93A83520E801}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C78FA352-3E44-40FD-854D-93A83520E801}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C78FA352-3E44-40FD-854D-93A83520E801}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C78FA352-3E44-40FD-854D-93A83520E801}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {2952AF63-3169-4FAC-90E3-8BC05E8E9568}
+	EndGlobalSection
+EndGlobal

Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Net.Sockets;
+using System.IO;
+using System.Diagnostics;
+using System.Xml;
+using System.Windows.Forms;
+
+namespace GiantsLauncher
+{
+    class GiantsLauncher
+    {
+        [STAThread]
+        static void Main(string[] args)
+        {
+            List<string> SERVERS = ReadServers();
+            //string[] SERVERS = new string[] {"gckms.no-ip.org", "ahipstercat.fr"};
+            string GIANTS_PATH = Microsoft.Win32.Registry.GetValue(@"HKEY_CURRENT_USER\Software\PlanetMoon\Giants", "DestDir", "").ToString();
+            GIANTS_PATH += "\\Giants.exe";
+            if (!File.Exists(GIANTS_PATH))
+            {
+                GIANTS_PATH = SetPath();
+                GIANTS_PATH += "\\Giants.exe";
+            }
+            if (File.Exists(GIANTS_PATH))
+            {
+                Console.WriteLine("Giants path: {0}", GIANTS_PATH);
+                // check version
+                int version = GetGameBuild(GIANTS_PATH);
+                if (version != 1497)
+                {
+                    // gtfo
+                    Console.WriteLine("Game version is not 1.497. Found: {0}", version);
+                    return;
+                }
+                string server_ok = "";
+                foreach (string server in SERVERS)
+                {
+                    Console.WriteLine("Testing {0}", server);
+                    if (TestServer(server))
+                    {
+                        server_ok = server;
+                        break;
+                    }
+                }
+
+                if (server_ok != "")
+                {
+                    Console.WriteLine("Writing master server: {0}", server_ok);
+                    using (BinaryWriter writer = new BinaryWriter(File.Open(GIANTS_PATH, FileMode.Open, FileAccess.ReadWrite)))
+                    {
+                        int offset = 0x157954; // position of master server in binary
+                        Byte[] data = System.Text.Encoding.ASCII.GetBytes(server_ok);
+                        writer.Seek(offset, SeekOrigin.Begin); //move cursor to the position
+                        writer.Write(data);//write it
+                    }
+                }
+                Process.Start(GIANTS_PATH);
+            }
+        }
+
+        static List<string> ReadServers()
+        {
+            // Loading from a file, you can also load from a stream
+            try
+            {
+                XmlDocument xml = new XmlDocument();
+                xml.Load("giantslauncher.xml");
+                XmlNodeList elemList = xml.GetElementsByTagName("masterserver");
+                List<string> array = new List<string>();
+                for (int i = 0; i < elemList.Count; i++)
+                {
+                    array.Add(elemList[i].InnerXml);
+                }
+
+                if (array == null || array.Count < 1)
+                {
+                    WriteInitialConfig();
+                    return ReadServers();
+                }
+
+                return array;
+            }
+            catch (System.IO.FileNotFoundException)
+            {
+                WriteInitialConfig();
+                return ReadServers();
+            }
+        }
+
+        static void WriteInitialConfig()
+        {
+            XmlDocument xmlDoc = new XmlDocument();
+            XmlNode rootNode = xmlDoc.CreateElement("masterservers");
+            xmlDoc.AppendChild(rootNode);
+
+            XmlNode msNode = xmlDoc.CreateElement("masterserver");
+            msNode.InnerText = "gckms.no-ip.org";
+            rootNode.AppendChild(msNode);
+
+            msNode = xmlDoc.CreateElement("masterserver");
+            msNode.InnerText = "gckms.hipstercat.fr";
+            rootNode.AppendChild(msNode);
+
+            msNode = xmlDoc.CreateElement("masterserver");
+            msNode.InnerText = "gckms.vankerkom.be";
+            rootNode.AppendChild(msNode);
+
+            msNode = xmlDoc.CreateElement("masterserver");
+            msNode.InnerText = "gckms2.hipstercat.fr";
+            rootNode.AppendChild(msNode);
+
+            xmlDoc.Save("giantslauncher.xml");
+        }
+
+        static bool TestServer(string ip)
+        {
+            try
+            {
+                // Create a TcpClient.
+                // Note, for this client to work you need to have a TcpServer 
+                // connected to the same address as specified by the server, port
+                // combination.
+                TcpClient client = new TcpClient();
+
+                var result = client.BeginConnect(ip, 28900, null, null);
+
+                var success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(2));
+
+                if (!success)
+                {
+                    client.Close();
+                    return false;
+                }
+
+                NetworkStream stream = client.GetStream();
+
+                // Buffer to store the response bytes.
+                Byte[] data = new Byte[256];
+
+                // String to store the response ASCII representation.
+                String responseData = String.Empty;
+
+                // Read the first batch of the TcpServer response bytes.
+                Int32 bytes = stream.Read(data, 0, data.Length);
+                responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
+                Console.WriteLine("Received: {0}", responseData);
+
+                // Close everything.
+                stream.Close();
+                //client.EndConnect(result);
+
+                return true;
+            }
+            catch (SocketException e)
+            {
+                Console.WriteLine("SocketException: {0}", e);
+                return false;
+            }
+        }
+
+        static int GetGameBuild(string path)
+        {
+            using (BinaryReader reader = new BinaryReader(File.Open(path, FileMode.Open)))
+            {
+                int offset = 0x10da27; // position of game version as of 1497
+                reader.BaseStream.Seek(offset, SeekOrigin.Begin); // move cursor to the position
+                byte[] version = reader.ReadBytes(2); // read it
+                return BitConverter.ToUInt16(version, 0);
+            }
+        }
+        static string SetPath()
+        {
+            string path = "";
+            while (!File.Exists(path + "\\Giants.exe"))
+            {
+                FolderBrowserDialog fbd = new FolderBrowserDialog();
+                fbd.Description = "Select your Giants game directory";
+                DialogResult dr = fbd.ShowDialog();
+                if (dr == DialogResult.OK)
+                {
+                    path = fbd.SelectedPath;
+                }
+                else
+                {
+                    Environment.Exit(1);
+                    return "";
+                }
+            }
+
+            // add to registry
+            Microsoft.Win32.Registry.SetValue(@"HKEY_CURRENT_USER\Software\PlanetMoon\Giants", "DestDir", path);
+            return path;
+        }
+    }
+}

Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Les informations générales relatives à un assembly dépendent de
+// l'ensemble d'attributs suivant. Changez les valeurs de ces attributs pour modifier les informations
+// associées à un assembly.
+[assembly: AssemblyTitle("GiantsLauncher")]
+[assembly: AssemblyDescription("Launch Giants")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("GiantsWD")]
+[assembly: AssemblyProduct("GiantsLauncher")]
+[assembly: AssemblyCopyright("Copyright ©  2019")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// L'affectation de la valeur false à ComVisible rend les types invisibles dans cet assembly
+// aux composants COM. Si vous devez accéder à un type dans cet assembly à partir de
+// COM, affectez la valeur true à l'attribut ComVisible sur ce type.
+[assembly: ComVisible(false)]
+
+// Le GUID suivant est pour l'ID de la typelib si ce projet est exposé à COM
+[assembly: Guid("c78fa352-3e44-40fd-854d-93a83520e801")]
+
+// Les informations de version pour un assembly se composent des quatre valeurs suivantes :
+//
+//      Version principale
+//      Version secondaire
+//      Numéro de build
+//      Révision
+//
+// Vous pouvez spécifier toutes les valeurs ou indiquer les numéros de build et de révision par défaut
+// en utilisant '*', comme indiqué ci-dessous :
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]