From c78ee668d5a08ca4f528a4260de384aaa2a06fed Mon Sep 17 00:00:00 2001
From: Jeremy Lakeman <jeremy.lakeman@flinders.edu.au>
Date: Wed, 27 Apr 2016 13:14:09 +0930
Subject: [PATCH] Add interface index to UP/DOWN monitor message

---
 monitor.c           | 5 +++--
 overlay_interface.c | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/monitor.c b/monitor.c
index bfe6d135..dd65fb3f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -684,10 +684,11 @@ int monitor_tell_formatted(int mask, char *fmt, ...){
 }
 
 static void monitor_interface_change(struct overlay_interface *interface){
+  unsigned i = interface - overlay_interfaces;
   if (interface->state==INTERFACE_STATE_UP)
-    monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%s:UP\n", interface->name);
+    monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%u:%s:UP\n", i, interface->name);
   else if(interface->state==INTERFACE_STATE_DOWN)
-    monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%s:DOWN\n", interface->name);
+    monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%u:%s:DOWN\n", i, interface->name);
 }
 
 DEFINE_TRIGGER(iupdown, monitor_interface_change);
diff --git a/overlay_interface.c b/overlay_interface.c
index d5b14c16..06ef4a6a 100644
--- a/overlay_interface.c
+++ b/overlay_interface.c
@@ -108,7 +108,7 @@ void overlay_interface_monitor_up()
   unsigned i;
   for (i=0;i<OVERLAY_MAX_INTERFACES;i++){
     if (overlay_interfaces[i].state == INTERFACE_STATE_UP)
-      monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%s:UP\n", overlay_interfaces[i].name);
+      monitor_tell_formatted(MONITOR_INTERFACE, "\nINTERFACE:%u:%s:UP\n", i, overlay_interfaces[i].name);
   }
 }