Add script to generate dns entries from interface addresses

dns-generate-for-device.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+# Nico Schottelius, 2024-08-14
+#
+# Retrieve an IPv6 interface address and generate a generic
+# DNS zone file
+
+if [ #$ -ne 3 ]; then
+    echo "$0 address interface hostname"
+    exit 1
+fi
+
+address=$1; shift
+interface=$1; shift
+hostname=$1; shift
+
+interface_addr=$(ssh "root@${address}" "ip -o a sh dev ${interface}"  | awk '/inet6/ { print $4 }' | grep -v ^fe80| sed 's,/.*,,')
+
+echo "${hostname}     AAAA ${interface_addr}"