UPnP Checking and updates

TestUPnP/Program.cs

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+using System;
+using System.Threading.Tasks;
+using QemuVmManager.Core;
+using System.Threading;
+
+class Program
+{
+    static async Task Main(string[] args)
+    {
+        Console.WriteLine("🔍 Testing UPnP Functionality on macOS");
+        Console.WriteLine("=====================================");
+        
+        var upnpManager = new UPnPManager();
+        
+        try
+        {
+            Console.WriteLine("\n1. Testing UPnP Availability (with shorter timeout)...");
+            Console.WriteLine("   This may take up to 30 seconds...");
+            
+            // Create a cancellation token with a reasonable timeout
+            using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));
+            
+            var isAvailable = await upnpManager.IsUPnPAvailableAsync();
+            Console.WriteLine($"UPnP Available: {isAvailable}");
+            
+            if (isAvailable)
+            {
+                Console.WriteLine("\n2. Getting External IP via UPnP...");
+                var externalIp = await upnpManager.GetExternalIpAddressAsync();
+                Console.WriteLine($"External IP: {externalIp}");
+                
+                Console.WriteLine("\n3. Testing Port Mapping...");
+                var portMappingResult = await upnpManager.AddPortMappingAsync(8080, 80, "Test Mapping");
+                Console.WriteLine($"Port Mapping Result: {portMappingResult}");
+                
+                if (portMappingResult)
+                {
+                    Console.WriteLine("\n4. Getting Port Mappings...");
+                    var mappings = await upnpManager.GetPortMappingsAsync();
+                    Console.WriteLine($"Active Mappings: {mappings.Count}");
+                    foreach (var mapping in mappings)
+                    {
+                        Console.WriteLine($"  {mapping.ExternalPort} -> {mapping.InternalIp}:{mapping.InternalPort} ({mapping.Description})");
+                    }
+                    
+                    Console.WriteLine("\n5. Removing Test Port Mapping...");
+                    var removeResult = await upnpManager.RemovePortMappingAsync(8080);
+                    Console.WriteLine($"Remove Result: {removeResult}");
+                }
+            }
+            else
+            {
+                Console.WriteLine("\n2. Running UPnP Diagnostics...");
+                var diagnostics = await upnpManager.GetUPnPDiagnosticsAsync();
+                Console.WriteLine(diagnostics);
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"❌ Error during UPnP testing: {ex.Message}");
+            Console.WriteLine($"Stack trace: {ex.StackTrace}");
+        }
+        
+        Console.WriteLine("\n✅ UPnP Test Complete!");
+    }
+}