#!/bin/sh
# Description: www.dyndns.org (free service)

#------------------------------------------------------------
# dyndns.org dynamic DNS update handler. 
#------------------------------------------------------------

IPADDR=$1
USERID=$2
PASSWD=$3
DOMAIN=$4

# This request will set wildcards on, such that *.$DOMAIN will resolve to
# $DOMAIN.  Thus, if your domain is fred.dyndns.org, www.fred.dyndns.org
# will resolve as well.

wget -q -O /tmp/dyndns.log \
--user-agent="e-smith-dyndns.org/0.1" \
http://"$USERID:$PASSWD"@members.dyndns.org/nic/update?\
system=dyndns\&hostname="$DOMAIN"\&myip="$IPADDR"\&wildcard=ON

RESULT=`cat /tmp/dyndns.log`
case "$RESULT" in
	good*)
	    logger -t dyndns.org "Update at $IPADDR succeeded." ;;
	nochg*)
	    logger -t dyndns.org "IP Address $IPADDR already in database." ;;
	notfqdn*)
	    logger -t dyndns.org \
	    	"$DOMAIN is not a Fully-Qualified Domain Name." ;;
	nohost*)
	    logger -t dyndns.org \
	    	"$DOMAIN does not exist on the dyndns.org system." ;;
	!yours*)
	    logger -t dyndns.org "$DOMAIN does not belong to you." ;;
	badauth*)
	    logger -t dyndns.org "Bad username or password $USERID:$PASSWD." ;;
	abuse*)
	    logger -t dyndns.org \
	    "$DOMAIN is blocked for abuse; contact support@dyndns.org" \
	    "to unblock." ;;
	numhost*)
	    logger -t dyndns.org "Too many or too few hosts found." ;;
	dnserr*)
	    logger -t dyndns.org "DNS Error encountered." \
		"Response was $RESULT. Please contact support@dyndns.org." ;;
	w*)
	    logger -t dyndns.org \
		"NIC is currently unavailable.  Response was $RESULT." ;;
	911*)
	    logger -t dyndns.org "Something is horribly wrong." ;;
	*)
	    logger -t dyndns.org "Unknown response $RESULT. Status was $?";;
esac

exit 0