1 files changed, 63 insertions, 0 deletions
diff --git a/MediaBrowser.ApiInteraction/ServerDiscovery.cs b/MediaBrowser.ApiInteraction/ServerDiscovery.cs
new file mode 100644
index 000000000..99a65db5d
--- /dev/null
+++ b/MediaBrowser.ApiInteraction/ServerDiscovery.cs
@@ -0,0 +1,63 @@
+using System;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.ApiInteraction
+{
+    public static class ServerDiscovery
+    {
+        /// <summary>
+        /// Attemps to discover the server within a local network
+        /// </summary>
+        public static async Task<IPEndPoint> DiscoverServer()
+        {
+            // Create a udp client
+            var client = new UdpClient(new IPEndPoint(IPAddress.Any, GetRandomUnusedPort()));
+
+            // Construct the message the server is expecting
+            var bytes = Encoding.UTF8.GetBytes("who is MediaBrowserServer?");
+
+            // Send it - must be IPAddress.Broadcast, 7359
+            var targetEndPoint = new IPEndPoint(IPAddress.Broadcast, 7359);
+
+            // Send it
+            await client.SendAsync(bytes, bytes.Length, targetEndPoint).ConfigureAwait(false);
+
+            // Get a result back
+            var result = await client.ReceiveAsync().ConfigureAwait(false);
+
+            if (result.RemoteEndPoint.Port == targetEndPoint.Port)
+            {
+                // Convert bytes to text
+                var text = Encoding.UTF8.GetString(result.Buffer);
+
+                // Expected response : MediaBrowserServer|192.168.1.1:1234
+                // If the response is what we're expecting, proceed
+                if (text.StartsWith("mediabrowserserver", StringComparison.OrdinalIgnoreCase))
+                {
+                    text = text.Split('|')[1];
+
+                    var vals = text.Split(':');
+
+                    return new IPEndPoint(IPAddress.Parse(vals[0]), int.Parse(vals[1]));
+                }
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// Gets a random port number that is currently available
+        /// </summary>
+        private static int GetRandomUnusedPort()
+        {
+            var listener = new TcpListener(IPAddress.Any, 0);
+            listener.Start();
+            var port = ((IPEndPoint)listener.LocalEndpoint).Port;
+            listener.Stop();
+            return port;
+        }
+    }
+}