#!/bin/sh
################################################################################
#############################
## Author: Eric Ste-Marie
## Email: estemari@sympatico.ca
## Date:  December third 2000
## Note:  This script falls under Gnu General Public Licence.
##        go to "http://www.gnu.org/copyleft/gpl.html" for more information.
##        basically, it tells you that you have the legal permission to copy, distribute and/or modify
##        the software. It also tells you that it comes with NO WARRANTY.
##
##
######################################################
## Script to update changeIP dynamic dns to include as a  cron job.
## i.e.: "*/5 * * * * /sbin/SCRIPTNAME" to run it every five minutes
## It uses lynx patched with SSL
## put the script where you want it.
## Adjust the environment variables to suit your needs.
## PATHTOLYNX= patch to lynx. You can try "which lynx" on the command line
##             to find out
## PATHTOIFCONFIG = path to the ifconfig command, usually /sbin/ifconfig
## PATHTOCURRENTIP = file where to store the most recent ip
## PATHTOLOGFILE = file where to log information
## INTERFACE = Network interface to configure.  e.g. ppp0, eth0, ppp
##             (you can find out with ifconfig -a)
## USER = Your changeIP username
## PASSWORD = Your changeIP password.  Note that if you want, you could
##            put the password in something like /etc/changeip/secret
##            and set PASSWORD=`cat /etc/changeip/secret`   Don't forget
##            to make this script and that file readable only by root
##            (chmod 700) for obvious reasons.
## CMD = changeIP commmand. update for most of us
## SET = 1
## OFFLINE = 0 (or one to put your domain name to your offline ip.
##
##
##
## Don't forget to chmod 700 the script as you have the password in there.
## (chmod 700 /sbin/SCRIPTNAME)
## Don't forget to chown root:root the script or bin:bin .
## (chown root:root /sbin/SCRIPTNAME)
##
## After you run the script for the first time, remember to verify that the
## log files are NOT readable by anybody else than root, especially if you
## use debug mode (set -x)

# set -x                                    #uncomment to run in debug mode

###############Script variables to set##################################
PATHTOLYNX='/usr/bin/lynx'
PATHTOIFCONFIG='/sbin/ifconfig'
PATHTOCURRENTIP='/var/log/changeip/ip'
PATHTOLOGFILE='/var/log/changeip/cip.log'
INTERFACE=ppp0
USER='USERNAME'         #might be case sensitive
PASSWORD='PASSWORD'     #might be case sensitive
CMD=update
SET=1
OFFLINE=0
##########################################################################
#
umask 177                                    #To set file creation to 600
CURRENTIP=`$PATHTOIFCONFIG $INTERFACE|grep inet|awk '{print $2}' |awk -F: '{print $2}'`

tail -1 $PATHTOCURRENTIP | grep $CURRENTIP 1>/dev/null 2>&1
if [ $? -ne 0 ];
then
	$PATHTOLYNX -dump -accept_all_cookies "https://www.changeip.com/update.asp?u=$USER&p=$PASSWORD&cmd=$CMD&set=$SET&offline=$OFFLINE" 1>>$PATHTOLOGFILE 2>&1
	#CURRENTIP=`$PATHTOIFCONFIG -a|grep -A 1 $INTERFACE|grep inet|awk '{print $2}' |awk -F: '{print $2}'`
	/bin/date >> $PATHTOCURRENTIP
	echo "$CURRENTIP" >> $PATHTOCURRENTIP

	echo "$CURRENTIP"
	/etc/init.d/ntpd reload
	/etc/init.d/upnpd restart
fi