Add functions to find the devices connected to this device

EduNetworkBuilder/NetworkDevice.cs

@@ -655,6 +655,53 @@ namespace EduNetworkBuilder
             }
         }
 
+        /// <summary>
+        /// Return the list of devices connected to this device
+        /// </summary>
+        /// <returns>A list of devices</returns>
+        List<NetworkDevice> ConnectedTo()
+        {
+            List<NetworkDevice> connected = new List<NetworkDevice>();
+            foreach(NetworkCard nic in NICs)
+            {
+                NetworkDevice nd = ConnectedTo(nic);
+                if (nd != null) connected.Add(nd);
+            }
+            return connected;
+        }
+
+        /// <summary>
+        /// return the device this nic is attached to
+        /// </summary>
+        /// <param name="NIC"></param>
+        /// <returns></returns>
+        NetworkDevice ConnectedTo(NetworkCard NIC)
+        {
+            return NIC.ConnectedTo();
+        }
+        /// <summary>
+        /// return the device this nic is attached to
+        /// </summary>
+        /// <param name="NIC">the network card ID</param>
+        /// <returns></returns>
+        NetworkDevice ConnectedTo(HostNicID NIC)
+        {
+            NetworkCard nic = NicFromID(NIC);
+            if (nic == null) return null;
+            return nic.ConnectedTo();
+        }
+        /// <summary>
+        /// return the device this nic is attached to
+        /// </summary>
+        /// <param name="nicname">The network card name</param>
+        /// <returns></returns>
+        NetworkDevice ConnectedTo(string nicname)
+        {
+            NetworkCard nic = NicFromName(nicname);
+            if (nic == null) return null;
+            return nic.ConnectedTo();
+        }
+
         /// <summary>
         /// Check to see if the device has a link to the specified host
         /// </summary>