#!/bin/sh
# Register current IP as the address for <domain>
# Pass this script to netcat like this: nc gnudip.dynu.com 3495 -e <this_script>
# Refer to: http://gnudip2.sourceforge.net/gnudip-www/latest/gnudip/html/protocol.html
read salt
echo "<user_name>:$(echo -n "$(echo -n '<password>' | md5sum | sed 's, .*,,').$salt" | md5sum | sed 's, .*,,'):<domain>:2"
read resp
echo $resp > /tmp/gnudip.out