PPP Loadbalance Debian
From MS Computech
PPP Loadbalance Debian Script
Source <source lang="bash" line start="0">
- !/bin/bash
- PPP Load Balancer Script #
- #
- Author: Neutron Soutmun #
- Created: 2008-04-28 #
- Copyright: © 2008 Neutron Soutmun <[email protected]> #
- License: GPL-2 #
VERSION=0.1.1
- LOG_DIR : Store the neccessary log files for ppp load balance processing.
LOG_DIR=/var/log/ppp-balance
- TABLE_PREFIX : The prefix for the table name that specified in
- /etc/iproute2/rt_tables for identification of route.
TABLE_PREFIX=isp
- GAMEONLINE_ROUTE_TO_IFNO : The interface number which desired to be the
- GameOnline routing path.
- You must set the netfilter rules for this function
- will work properly.
- To disable this, set it to -1
- Example netfilter rules:
- # iptables -t mangle -A PREROUTING -i eth0 -p tcp \
- -m multiport --dports 1025:65535 -j MARK --set-mark 0x4
- # iptables -t mangle -A PREROUTING -i eth0 -p udp \
- -m multiport --dports 1025:65535 -j MARK --set-mark 0x4
-
GAMEONLINE_ROUTE_TO_IFNO=3
- RELOAD_SQUID : Force to reload the squid config, workaround for the system
- that running squid process, disable set it to 0
RELOAD_SQUID=1
- VERBOSE : Verbose mode, display all logs and errors
- disable set it to 0.
VERBOSE=1
- Do not need to change below ###
IP=/sbin/ip IFCONFIG=/sbin/ifconfig SQUID=/etc/init.d/squid
RT_TABLES=/etc/iproute2/rt_tables
OLD_IF_FILE=${LOG_DIR}/old-if.log OLD_IF_COUNT_FILE=${LOG_DIR}/old-if-cnt.log OLD_RULE_FILE=${LOG_DIR}/old-rule.log NEXTHOP_FILE=${LOG_DIR}/nexthop.log REDIAL_LOG_FILE=${LOG_DIR}/redial.log TEMP_FILE=${LOG_DIR}/temp.log LOG_FILE=${LOG_DIR}/ppp-balance.log
log() {
timestamp=`date`
if [ ${VERBOSE} -gt 0 ]; then
echo "${timestamp}: $1"
fi
echo "${timestamp}: $1" >> ${LOG_FILE}
}
error() {
timestamp=`date`
if [ ${VERBOSE} -gt 0 ]; then
echo "${timestamp}: ERROR! - $1"
fi
echo "${timestamp}: ERROR! - $1" >> ${LOG_FILE}
exit $2
}
- Check if the system ready ###
- Check log dir
if [ ! -d ${LOG_DIR} ]; then
mkdir -p ${LOG_DIR} || exit 1
fi
- Check neccessary program
if [ ! -f ${IP} ]; then
error "The 'iproute2' package is not installed properly ?!!" 1
fi
- Check pre-defined tables name
rt_tables=`cat ${RT_TABLES} | grep "200 ${TABLE_PREFIX}0" | wc -l` if [ $rt_tables -eq 0 ]; then
## Create the route tables name from prefix
echo "" >> ${RT_TABLES}
echo "#" >> ${RT_TABLES}
echo "# Added by PPP Load Balancer" >> ${RT_TABLES}
echo "#" >> ${RT_TABLES}
for (( i = 0; i < 10; i++ )); do
echo "20${i} ${TABLE_PREFIX}${i}" >> ${RT_TABLES}
done
fi
- Clear the temporary files
echo "" > ${TEMP_FILE}
del_old_rule () {
log "Removing old rules ..."
${IP} rule show | grep ${TABLE_PREFIX} | grep -v "all to" > ${OLD_RULE_FILE}
while read line
do
#echo $line
line_ip=`echo $line | cut -d' ' -f3`
line_table=`echo $line | cut -d' ' -f5`
check=`echo ${line_table} | grep ${TABLE_PREFIX}`
if [ $? -eq 0 ]; then
log "${IP} rule del from ${line_ip} table ${line_table}"
${IP} rule del from ${line_ip} table ${line_table}
log "${IP} route flush table ${line_table}"
${IP} route flush table ${line_table}
fi
done < ${OLD_RULE_FILE}
}
update_route () {
log "Updating new route ..."
echo "" > ${NEXTHOP_FILE}
for PPP in ${PPP_LIST}
do
new_ppp=`cat ${TEMP_FILE} | grep ${PPP}`
new_ip=`echo ${new_ppp} | cut -d':' -f2`
new_tab=`echo ${new_ppp} | cut -d':' -f3`
log "${IP} route add ${new_ip}/32 dev ${PPP} src ${new_ip} table ${new_tab}"
${IP} route add ${new_ip}/32 dev ${PPP} src ${new_ip} table ${new_tab}
log "${IP} route add default via ${new_ip} table ${new_tab}"
${IP} route add default via ${new_ip} table ${new_tab}
log "${IP} rule add from ${new_ip} table ${new_tab}"
${IP} rule add from ${new_ip} table ${new_tab}
log "nexthop via ${new_ip} dev ${PPP} weight 1"
echo "nexthop via ${new_ip} dev ${PPP} weight 1 " >> ${NEXTHOP_FILE} 2>&1
done
}
update_default_route () {
log "Updating default route ..."
nexthop=`cat ${NEXTHOP_FILE}`
check=`echo $nexthop | grep nexthop | wc -l`
if [ $check -gt 0 ]; then
default_gw="${IP} route add default scope global equalize "
log "${default_gw} ${nexthop}"
${IP} route del default
${default_gw} ${nexthop}
# Game online and other ports 1025:65535 go through the specified game path
if [ ${GAMEONLINE_ROUTE_TO_IFNO} -gt -1 ]; then
log "Adding GameOnline interception ..."
${IP} rule del fwmark 4 table ${TABLE_PREFIX}${GAMEONLINE_ROUTE_TO_IFNO}
${IP} rule add fwmark 4 table ${TABLE_PREFIX}${GAMEONLINE_ROUTE_TO_IFNO}
fi
fi
}
- MAIN ###
changes=0
- Gathering current PPP list
PPP_LIST=`${IFCONFIG} | grep ppp | cut -d' ' -f1` IF_COUNT=`${IFCONFIG} | grep ppp | cut -d' ' -f1 | wc -l`
for PPP in ${PPP_LIST} do
if_ip=`${IFCONFIG} ${PPP} | grep inet | cut -d':' -f2 | cut -d' ' -f 1`
table_id=`echo ${PPP} | cut -d'p' -f4`
check_old=`cat ${OLD_IF_FILE} | grep ${PPP}`
check_ip=`echo ${check_old} | grep ${if_ip}`
if [ $? -eq 1 ]; then
# Some change in this device do update routing
log "${PPP} Routing change...."
changes=1
fi
echo ${PPP}:${if_ip}:${TABLE_PREFIX}${table_id} >> ${TEMP_FILE}
done
if [ -f ${OLD_IF_COUNT_FILE} ]; then
OLD_IF_COUNT=`cat ${OLD_IF_COUNT_FILE}`
else
OLD_IF_COUNT=0
fi
if [ ${OLD_IF_COUNT} != ${IF_COUNT} ]; then
log "Links size changed!" changes=1
fi
if [ ${changes} -eq 1 ]; then
del_old_rule
update_route
update_default_route
${IP} route flush cache
if [ ${RELOAD_SQUID} -gt 0 ]; then
log "Reloading SQUID config ..."
${SQUID} reload
fi
date >> ${REDIAL_LOG_FILE}
success=`${IP} route | grep nexthop | wc -l`
if [ ${success} -gt 0 ]; then
cp ${TEMP_FILE} ${OLD_IF_FILE}
echo ${IF_COUNT} > ${OLD_IF_COUNT_FILE}
log "Updated!"
else
rm -f ${OLD_IF_FILE}
rm -f ${OLD_IF_COUNT_FILE}
log "Update Pending! - Retry in the next time."
fi
fi
- END ###
</source> Cron Job
nano /etc/cron.d/ppp-balance
*/1 * * * * root /usr/local/bin/ppp-balance.sh >/dev/null 2>&1
/etc/init.d/cron restart
