asterisk.ru

#!/bin/bash
# ip_check.sh
# Description: script that queries checkip.dyndns.com to find the server's external IP address. Updates asterisk's externip value and does a sip reload if necessary.

is_ip(){
input=$1
octet1=$(echo $input | cut -d "." -f1)
octet2=$(echo $input | cut -d "." -f2)
octet3=$(echo $input | cut -d "." -f3)
octet4=$(echo $input | cut -d "." -f4)
stat=1
if [[ $input =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]] && [ $octet1 -le 255 ] && [ $octet2 -le 255 ] && [ $octet3 -le 255 ] && [ $octet4 -le 255 ];
then stat=0
fi
return $stat
}

EXTERNIP=`wget -qO- checkip.dyndns.com | awk '{print $6}'| cut -d "<" -f1`
is_ip $EXTERNIP
if [ $? -ne 0 ];
then
logger -s "ip_check.sh: External IP address invalid or unavailable, exiting."
exit 1
fi
OLDEXTERNIP=`grep externip /etc/asterisk/sip_general_additional.conf | cut -d"=" -f2`
echo $OLDEXTERNIP
if [ "$EXTERNIP" = "$OLDEXTERNIP" ]; then
logger -s "ip_check.sh: External IP address "$EXTERNIP" is the same, nothing to do exiting."
exit 0
else
logger -s "ip_check.sh: External IP address has changed "$OLDEXTERNIP" --> "$EXTERNIP", changing /etc/asterisk/sip_general_additional.conf"
grep -v "externip" /etc/asterisk/sip_general_additional.conf > /etc/asterisk/sip_general_additional.conf.tmp
echo "externip=$EXTERNIP" >> /etc/asterisk/sip_general_additional.conf.tmp
cp /etc/asterisk/sip_general_additional.conf.tmp /etc/asterisk/sip_general_additional.conf
rm /etc/asterisk/sip_general_additional.conf.tmp
logger -s "Doing asterisk -rx sip reload"
asterisk -rx "sip reload"
fi