added address

airplayServer.cpp

@@ -123,6 +123,10 @@ std::string find_mac() {
     }
     if (!iface_stream) {
         printf("No enp8s0 \n");
+        iface_stream.open("/sys/class/net/enp4s0/address");
+    }
+    if (!iface_stream) {
+        printf("No enp4s0 \n");
         printf("No Device found! \n");
         return "";
     }