--- a/master/ioctl.h	Fri Apr 17 12:41:57 2009 +0000
+++ b/master/ioctl.h	Fri Apr 17 12:55:55 2009 +0000
@@ -127,6 +127,7 @@
     struct {
         uint8_t address[6];
         uint8_t attached;
+        uint8_t link_state;
         uint32_t tx_count;
         uint32_t rx_count;
     } devices[2];