check ip interface before start

MainForm.cs

@@ -1,8 +1,11 @@
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Net;
+using System.Net.NetworkInformation;
 using System.Runtime.CompilerServices;
 using System.Web;
 using Tmds.MDns;
+using Xamarin.Forms;
 
 namespace robospot_camera_finder
 {
@@ -44,6 +47,33 @@ namespace robospot_camera_finder
         {
             InitializeComponent();
 
+            bool got_proper_ip = false;
+            foreach (var net_interface in NetworkInterface.GetAllNetworkInterfaces())
+            {
+                IPInterfaceProperties prop = net_interface.GetIPProperties();
+                foreach (var ip in prop.UnicastAddresses)
+                {
+                    if (ip.Address.ToString().StartsWith("10."))
+                    {
+                        if (ip.IPv4Mask.ToString() == "255.0.0.0")
+                        {
+                            got_proper_ip = true;
+                        }
+                    }
+                }
+            }
+            if (!got_proper_ip)
+            {
+                DialogResult open_netsettings = MessageBox.Show("No Ethernet interface on the 10.0.0.0/8 subnet found. Cameras might not be detected. Do you want to open network settings ?", "Wrong IP configuration", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
+                if (open_netsettings == DialogResult.Yes)
+                {
+                    ProcessStartInfo startInfo = new ProcessStartInfo("NCPA.cpl");
+                    startInfo.UseShellExecute = true;
+
+                    Process.Start(startInfo);
+                }
+            }
+
             browser.StartBrowse("_rtsp._tcp");
 
             lbMain.DataSource = all_cameras;