Initial commit

src/ReverseLlama.Client/TunnelWorker.cs

@@ -0,0 +1,30 @@
+using Microsoft.Extensions.Hosting;
+
+namespace ReverseLlama.Client;
+
+internal sealed class TunnelWorker : BackgroundService
+{
+    private readonly TunnelClient _client;
+    private readonly IHostApplicationLifetime _lifetime;
+
+    public TunnelWorker(TunnelClient client, IHostApplicationLifetime lifetime)
+    {
+        _client = client;
+        _lifetime = lifetime;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        try
+        {
+            await _client.RunAsync(stoppingToken);
+        }
+        finally
+        {
+            // RunAsync only returns when cancelled or replaced by a newer client.
+            // Stop gracefully (exit 0) so service recovery does not restart us
+            // into a reconnect fight with the replacement.
+            _lifetime.StopApplication();
+        }
+    }
+}