From 760ac61e5ba7580c5829207bf6111980f295e8bd Mon Sep 17 00:00:00 2001
From: Tom Laermans <tom@localhost>
Date: Sun, 21 Feb 2010 14:54:02 +0000
Subject: [PATCH] patch from jduggan to detect mac address changes

git-svn-id: http://www.observium.org/svn/observer/trunk@918 61d68cd4-352d-0410-923a-c4978735b2b8
---
 includes/discovery/arp-table.inc.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/includes/discovery/arp-table.inc.php b/includes/discovery/arp-table.inc.php
index 82dea9945..18249e50f 100644
--- a/includes/discovery/arp-table.inc.php
+++ b/includes/discovery/arp-table.inc.php
@@ -35,6 +35,12 @@
     $mac_table[$interface_id][$clean_mac] = 1;
     if(mysql_result(mysql_query("SELECT COUNT(*) from ipv4_mac WHERE interface_id = '".$interface['interface_id']."' AND ipv4_address = '$ip'"),0)) {
       $sql = "UPDATE `ipv4_mac` SET `mac_address` = '$clean_mac' WHERE interface_id = '".$interface['interface_id']."' AND ipv4_address = '$ip'";
+      $old_mac = mysql_fetch_row(mysql_query("SELECT mac_address from ipv4_mac WHERE ipv4_address='$ip'"));
+      if($clean_mac != $old_mac[0]) 
+      {
+        if ($debug) { echo "Changed mac address for $ip from $old_mac[0] to $clean_mac\n"; }
+        log_event("MAC change: $ip : " . $old_mac[0] . " -&gt; $clean_mac", $device, "interface", $interface['interface_id']);
+      }
       mysql_query($sql);
       echo(".");
     } else {