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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-load_balancing.sh 1068 2013-04-10 05:20:10Z franck $
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# $Id: alcasar-load_balancing.sh 1078 2013-05-02 16:40:54Z franck $
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# Generic Load balancer for multiple WAN links - version 1.1 (04 Feb 2011)
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# Generic Load balancer for multiple WAN links - version 1.1 (04 Feb 2011)
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# (c) 2011 Pau Oliva Fora - http://pof.eslack.org
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# (c) 2011 Pau Oliva Fora - http://pof.eslack.org
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#
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#
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# Licensed under GPLv3 - for full terms see:
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# Licensed under GPLv3 - for full terms see:
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#
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#
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# Specify each WAN link in a separate column, example:
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# Specify each WAN link in a separate column, example:
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# In this example we have 3 wan links (vlanXXX interfaces) attached to a single
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# In this example we have 3 wan links (vlanXXX interfaces) attached to a single
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# physical interface because we use a vlan-enabled switch between the balancer
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# physical interface because we use a vlan-enabled switch between the balancer
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# machine and the ADSL routers we want to balance. The weight parameter should
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# machine and the ADSL routers we want to balance. The weight parameter should
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# be kept to a low integer, in this case the ADSL line connected to vlan101 and
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# be kept to a low integer.
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# vlan102 is 4Mbps and the ADSL line connected to vlan100 is 8Mbps (twice fast)
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# so the WEIGHT value in vlan100 is 2 because it is two times faster.
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#
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#
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#
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#
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# Modified by ALCASAR team :
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# Modified by ALCASAR team :
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prog="alcasar-load_balancing.sh"
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pidfile="/var/run/alcasar-load_balancing.pid"
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###############################
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###############################
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# MAIN PARAMETERs Configuration
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# MAIN PARAMETERs Configuration
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###############################
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###############################
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DIR_ETC="/usr/local/etc"
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CONF_FILE="$DIR_ETC/alcasar.conf"
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# enable link failover watchdog? set to "yes" or "no".
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MULTIWAN=`grep MULTIWAN= $CONF_FILE|cut -d"=" -f2`
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WATCHDOG="yes"
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MULTIWAN=${MULTIWAN:=off}
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FAILOVER=`grep FAILOVER= $CONF_FILE|cut -d"=" -f2`
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SLEEP="30"
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FAILOVER=${FAILOVER:=30}
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# space separated list of public IPs to ping in watchdog mode
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# space separated list of public IPs to ping in watchdog mode
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# set this to some public ip addresses pingable and always on.
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# set this to some public ip addresses pingable and always on.
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TESTIPS="8.8.8.8 192.0.32.10"
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TESTIPS="8.8.8.8 192.0.32.10"
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# set to 1 when testing, set to 0 when happy with the results
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# set to 1 when testing, set to 0 when happy with the results
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VERBOSE=1
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VERBOSE=0
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# CONFIGURATION ENDS HERE
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# CONFIGURATION ENDS HERE
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###############################
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###############################
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if [ $(whoami) != "root" ]; then
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if [ $(whoami) != "root" ]; then
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        echo "You must be root to run this!" ; echo ; exit 1
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        echo "You must be root to run this!" ; echo ; exit 1
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fi
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fi
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# Adapter for ALCASAR project
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# Adapter for ALCASAR project
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	while : ; do
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	while : ; do
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		if [ $VERBOSE -eq 1 ]; then
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		if [ $VERBOSE -eq 1 ]; then
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			echo "[] Sleeping, state=$STATE"
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			echo "[] Sleeping, state=$STATE"
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		fi
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		fi
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		sleep $SLEEP
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		sleep $FAILOVER
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		IFINDEX=1
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		IFINDEX=1
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		DOWN=""			# liste des interfaces down
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		DOWN=""			# liste des interfaces down
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		DOWNCOUNT=0		# nombre d'interface down
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		DOWNCOUNT=0		# nombre d'interface down
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		for iface in $WANIFACE ; do
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		for iface in $WANIFACE ; do
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		create_eth
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		create_eth
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	;;
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	;;
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	delete)
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	delete)
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		delete_eth
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		delete_eth
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	;;
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	;;
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	fail)
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		failover
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	;;
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	start)
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	start)
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		PARAM="add"
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		create_eth
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                if [ "$MULTIWAN" != "on" ] && [ "$MULTIWAN" != "On" ]; then
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		if [ $WATCHDOG != "yes" ]; then
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		    echo "The MultiGateway is not activated !"
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			exit 0
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		    exit 0
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		fi
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		fi
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                PARAM="add"
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                create_eth
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		ip route flush cache
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                ip route flush cache
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                if [ $FAILOVER -eq 0 ]; then
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		      echo "The MultiWAN Mode is actived but not failover connectivity !"
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#		RETVAL=$?
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		      exit 0
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#		echo
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		fi
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                echo "Starting down $prog: "
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#		[ $RETVAL -eq 0 ] && touch /var/lock/subsys/alcasar-load_balancing
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                pid=`pidof -x "alcasar-load_balancing.sh"`
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                if [ $pid != "" ]; then
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                        echo $pid > $pidfile
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                fi
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		touch /var/lock/subsys/alcasar-load_balancing
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                touch /var/lock/subsys/alcasar-load_balancing
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		failover
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                failover
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	;;
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	;;
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	stop)
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	stop)
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		PARAM="del"
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		PARAM="del"
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		prog="alcasar-load_balancing.sh"
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		echo "Shutting down $prog: "
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                if [ -f $pidfile ]; then
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	        gprintf $"Shutting down $prog: "
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                        pid=`cat $pidfile`
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                        kill -9 $pid
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                else
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                        echo "$prog is not running."
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                        exit 1
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		killproc $prog
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                fi
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		RETVAL=$?
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                RETVAL=$?
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	        echo
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                echo
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	        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/alcasar-load_balancing
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                [ $RETVAL -eq 0 ] && rm -f $pidfile && rm -f /var/lock/subsys/alcasar-load_balancing
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                echo "Delete of virtual interfaces"
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                delete_eth
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                echo "Network restart"
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                service network restart 2>&1 > /dev/null
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                ip route
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	;;
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	status)
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                echo "Checking  $prog : "
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                if [ -f $pidfile ]; then
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                        pid=`cat $pidfile`
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                        CHECK=`ps -p $pid --no-heading | awk {'printf $1'}`
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                        if [ "$CHECK" = "" ]; then
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                                echo "$prog is NOT running."
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                        else
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                                echo "$prog is running !"
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                        fi
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                else
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                                echo "$prog is Not running."
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		return $RETVAL
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                fi
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	;;
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	fail)
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		ip route
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		failover
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	;;
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	;;
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	*)
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	*)
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		echo "Usage: $0 [start|stop|create|delete]" ; echo ; exit 1
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		echo "Usage: $0 [start|stop|status|create|delete]" ; echo ; exit 1
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	;;
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	;;
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esac
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esac
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exit 0
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exit 0