From a47aa45253009c877d3ee551a39e2dadbe4920b5 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Fri, 8 Feb 2019 13:03:42 +0100
Subject: dhcp-to-dns: use mac-address if hostname is empty

---
 dhcp-to-dns | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dhcp-to-dns b/dhcp-to-dns
index d769bf6..8edb45b 100644
--- a/dhcp-to-dns
+++ b/dhcp-to-dns
@@ -42,6 +42,9 @@
   :set DhcpIp [ / ip dhcp-server lease get $Lease address ];
   :local Comment ("managed by dhcp-to-dns for " . $Mac);
   :set HostName [ $CharacterReplace [ / ip dhcp-server lease get $Lease host-name ] " " "" ];
+  :if ($HostName = "") do={
+    :set HostName [ $CharacterReplace [ / ip dhcp-server lease get $Lease mac-address ] ":" "-" ];
+  }
 
   :if ([ :len $HostName ] > 0) do={
     :set Fqdn ($HostName . "." . $Zone);
-- 
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