[Devil-linux-develop] ddup scripts

[Manu E. <ee...@ma...>]

Hi Friedrich,

this is quite a Bad bash script (i'm not a developper !) but it works 
... sure you can easily improve !


* I use rp-pppoe to connect to the internet 24/24.

* I write a script /etc/ppp/adsl-lost wich is called by 
/usr/sbin/adsl-connect each time pppd dies; it simply call update_dyndns 
script, but could be used for other stuff to do when Adsl link comes 
down (ex change route to use an isdn link as backup ... etc)

* also create a script (from the skeleton)  /etc/init.d/adsl to 
start/stop/restart adsl link : it simply call /usr/sbin/adsl-start and 
then update_dyndns
(started with 0.5b6 ... there was none ... )

* add $WAN_HOST in the /etc/sysconfig/config file to store the dyndns 
name for that host

* get_inet_addr and get_ddns_addr are standalone scripts as i use them 
for other things.  (i know these are bad  ;-) )

Comments are welcome ! but don't be too malicious, i'm sensitive ;-)

MaNU

----------------
#!/bin/sh

# script execute quand on remonte le lien adsl
#
# /root/sbin/update_dyndns
#

source /etc/sysconfig/config

logger -p info  "Lien ADSL en cours de (re)connexion ... "


if ! [ -f /var/run/adsl-lost.pid ]; then                #si le process 
n'est pas déja en train de tourner ...

        echo "1" > /var/run/adsl-lost.pid
        logger -p info  "On boucle jusqu'a ppp0 .... "
        until [ -d /proc/sys/net/ipv4/conf/ppp0 ]       #on boucle 
jusqu'a ce que ppp0 soit up ...
        do
                logger -p info  "On attend 1 Minute de plus ... "
                sleep 60

        done

        logger -p info  "L'ADSL est de Retour .... "

        # on teste si l'ip a change

        until test "$MY_DDNS" != ""; do
          sleep 1
          MY_DDNS=`/root/sbin/get_ddns_addr`
        done

        until test "$MY_INET" != ""; do
          sleep 1
          MY_INET=`/root/sbin/get_inet_addr`
        done

        if test $MY_INET != $MY_DDNS ; then

                # l'IP a CHANGE, on a un certain nombre de choses a 
mettre a jour
                logger -p info  "L'adresse a changée : $MY_DDNS => 
$MY_INET .... "

                # en commencant par le dynamic DNS

                /usr/sbin/ddup --host $WAN_HOST | logger -p info

                sleep 5 # un petit delai pour la propagation de la 
nouvelle adresse

                # puis on recharge les regles du firewall pour prendre 
en compte le changement

                /usr/bin/setsid /etc/init.d/firewall reload

        else
                logger -p info  "L'adresse est inchangée : $MY_DDNS == 
$MY_INET .... "

        fi
        rm /var/run/adsl-lost.pid
fi

----------------

----------------
#!/bin/sh
#
# /root/sbin/get_inet_addr
#

ifconfig ppp0 | awk '/inet addr:/ {print $2}' | awk '// {print $2}' FS=":"
----------------

----------------
#!/bin/sh
#
# /root/sbin/get_ddns_addr
#
source /etc/sysconfig/config

nslookup -sil $WAN_HOST | grep -A 1 $WAN_HOST | awk '{print $4}' RS="/"
----------------