From 7b084fd314af91a87eec56b57e59e5cd98df3558 Mon Sep 17 00:00:00 2001
From: Renato Botelho <renato@netgate.com>
Date: Tue, 23 May 2017 16:04:51 -0300
Subject: [PATCH] SG-23* serial number is igb0 mac address

---
 src/etc/inc/system.inc | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/etc/inc/system.inc b/src/etc/inc/system.inc
index b0c00d761f..c7c6be20fe 100644
--- a/src/etc/inc/system.inc
+++ b/src/etc/inc/system.inc
@@ -2322,9 +2322,18 @@ EOD;
 }
 
 function system_get_serial() {
+	$platform = system_identify_specific_platform();
+
 	unset($output);
-	$_gb = exec('/bin/kenv -q smbios.system.serial 2>/dev/null', $output);
-	$serial = $output[0];
+	if ($platform['name'] == 'Turbot Dual-E') {
+		$if_info = pfSense_get_interface_addresses('igb0');
+		if (!empty($if_info['hwaddr'])) {
+			$serial = str_replace(":", "", $if_info['hwaddr']);
+		}
+	} else {
+		$_gb = exec('/bin/kenv smbios.system.serial 2>/dev/null', $output);
+		$serial = $output[0];
+	}
 
 	$vm_guest = get_single_sysctl('kern.vm_guest');