Added Rule and Route system

VirtualDDNSRouter.Server/Interfaces/IYamlParser.cs

@@ -0,0 +1,6 @@
+namespace VirtualDDNSRouter.Server.Interfaces;
+
+public interface IYamlParser
+{
+    Task<List<Models.Rule>> GetRules();
+}

VirtualDDNSRouter.Server/Models/Rule.cs

@@ -0,0 +1,24 @@
+using System.Net;
+using YamlDotNet.Serialization;
+
+namespace VirtualDDNSRouter.Server.Models;
+
+public record Rule
+{
+    public string name { get; init; } = string.Empty;
+    public string apiKey { get; init; } = string.Empty;
+    public string path { get; init; } = string.Empty;
+
+    public Rule() { } // Needed for AOT static deserializer
+}
+
+
+public record Route
+{
+    public string path { get; set; } = string.Empty;
+    public IPAddress ipAddress { get; set; } = IPAddress.None;
+
+    public UInt16 port { get; set; } = 80;
+
+    public Route() { }
+}

VirtualDDNSRouter.Server/Program.cs

@@ -1,5 +1,10 @@
 using System.Text.Json.Serialization;
 using Microsoft.AspNetCore.Http.HttpResults;
+using VirtualDDNSRouter.Server.Interfaces;
+using VirtualDDNSRouter.Server.Models;
+using VirtualDDNSRouter.Server.Services;
+using Route = VirtualDDNSRouter.Server.Models.Route;
+
 
 var builder = WebApplication.CreateSlimBuilder(args);
 
@@ -8,6 +13,8 @@ builder.Services.ConfigureHttpJsonOptions(options =>
     options.SerializerOptions.TypeInfoResolverChain.Insert(0, AppJsonSerializerContext.Default);
 });
 
+builder.Services.AddSingleton<IYamlParser, YamlParser>();
+
 // Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
 builder.Services.AddOpenApi();
 
@@ -18,12 +25,42 @@ if (app.Environment.IsDevelopment())
     app.MapOpenApi();
 }
 
+List<Route> routes = new List<Route>();
 
+app.MapPut("/setip/{path}/{port}/{apiKey}", async (IYamlParser yamlParser ,HttpContext context, string path, UInt16 port, string apiKey) =>
+{
+    var rules = await yamlParser.GetRules();
+    var ruleValid = rules.Any(r => r.path == path && r.apiKey == apiKey);
+    if (!ruleValid)
+    {
+        return Results.StatusCode(StatusCodes.Status403Forbidden);
+    }
+    var clientIp = context.Connection.RemoteIpAddress;
+    if (clientIp is null) return Results.BadRequest("Could not get the client ip address");
+    routes.Add(new Route
+    {
+        ipAddress = clientIp,
+        path = path,
+        port = port
+    });
+    return Results.Created();
+});
+
+app.MapGet("/goto/{path}", async (string path) =>
+{
+    var ruleExists = routes.Any(r => r.path == path);
+    if (!ruleExists) Results.NoContent();
+    var redirectRoute = routes.FirstOrDefault(r => r.path == path);
+    return Results.Redirect($"http://{redirectRoute.ipAddress}:{redirectRoute.port}");
+    
+});
 
 app.Run();
 
 
-[JsonSerializable(typeof(Object))]
+
+//[JsonSerializable(typeof(Rule))]
+[JsonSerializable(typeof(Route))]
 internal partial class AppJsonSerializerContext : JsonSerializerContext
 {
 }

VirtualDDNSRouter.Server/Services/YamlParser.cs

@@ -0,0 +1,31 @@
+using System.Diagnostics.CodeAnalysis;
+using VirtualDDNSRouter.Server.Interfaces;
+using VirtualDDNSRouter.Server.Models;
+using YamlDotNet.Serialization;
+using YamlDotNet.Serialization.NamingConventions;
+
+namespace VirtualDDNSRouter.Server.Services;
+
+public class YamlParser : IYamlParser
+{
+    private readonly string _yamlFilePath = "rules.yaml";
+
+    public async Task<List<Rule>> GetRules()
+    {
+        if (!File.Exists(_yamlFilePath))
+            throw new FileNotFoundException($"YAML file not found: {_yamlFilePath}");
+
+        var yamlContent = await File.ReadAllTextAsync(_yamlFilePath).ConfigureAwait(false);
+
+        // Build the deserializer with explicit naming convention
+        var deserializer = new DeserializerBuilder()
+            .WithNamingConvention(UnderscoredNamingConvention.Instance) // maps api_key -> apiKey
+            .IgnoreUnmatchedProperties()
+            .Build();
+
+        // Deserialize into a list of Rule
+        var rules = deserializer.Deserialize<List<Rule>>(yamlContent);
+
+        return rules ?? new List<Rule>();
+    }
+}

VirtualDDNSRouter.Server/VirtualDDNSRouter.Server.csproj

@@ -12,6 +12,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.0-preview.6.25358.103"/>
+        <PackageReference Include="Vecc.YamlDotNet.Analyzers.StaticGenerator" Version="16.3.0" />
         <PackageReference Include="YamlDotNet" Version="16.3.0" />
     </ItemGroup>
 

VirtualDDNSRouter.Server/rules.example.yaml

@@ -0,0 +1,8 @@
+Rules:
+  - Name: "B"
+    ApiKey: "abc123XYZ"
+    Route: "B"
+
+  - Name: "A"
+    ApiKey: "def456ABC"
+    Route: "A"