#!/bin/sh

export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/mod/sbin:/mod/bin:/mod/usr/sbin:/mod/usr/bin
export LD_LIBRARY_PATH=/mod/lib:/mod/usr/lib

DAEMON=virtualip

if [ ! -r "/mod/etc/conf/$DAEMON.cfg" ]; then
	echo "Error[$DAEMON]: not configured" 1>&2
	exit 1
fi

. /mod/etc/conf/$DAEMON.cfg


ipv4bcast () {
    local IP1=${1%%.*.*.*}
    local IP2=${1#*.};    IP2=${IP2%%.*.*}
    local IP3=${1#*.*.};  IP3=${IP3%%.*}
    local IP4=${1#*.*.*.}
    local NM1=${2%%.*.*.*}
    local NM2=${2#*.};    NM2=${NM2%%.*.*}
    local NM3=${2#*.*.};  NM3=${NM3%%.*}
    local NM4=${2#*.*.*.}
    local IIP=$(($IP1 << 24 | $IP2 << 16 | $IP3 << 8 | $IP4))
    local INM=$(($NM1 << 24 | $NM2 << 16 | $NM3 << 8 | $NM4))
    local IBC=$((${IIP} | ~${INM}))
    printf "%u.%u.%u.%u" $((${IBC} >> 24 & 0xFF)) $((${IBC} >> 16 & 0xFF)) \
                         $((${IBC} >> 8 & 0xFF)) $((${IBC} & 0xFF))
}


start() {
    echo -n 'Setting up virtual network interface ...'
    
    VIRTUALIP_BROADCAST="`ipv4bcast $VIRTUALIP_IP $VIRTUALIP_NETMASK`"

    ifconfig $VIRTUALIP_INTERFACE $VIRTUALIP_IP netmask $VIRTUALIP_NETMASK broadcast $VIRTUALIP_BROADCAST up > /dev/null 2>&1
    exitval=$?
    if [ "$exitval" -eq 0 ]; then
        echo ' done.'
    else
        echo ' failed.'
        exit $exitval
    fi
}

stop() {
    echo -n 'Deactivating virtual network interface ...'
    ifconfig $VIRTUALIP_INTERFACE down > /dev/null 2>&1 > /dev/null 2>&1
    exitval=$?
    if [ "$exitval" -eq 0 ]; then
        echo ' done.'
    else
        echo ' failed.'
        exit $exitval
    fi
}

case "$1" in
    ""|load)
        modreg cgi 'virtualip' 'Virtual IP'

        if [ "$VIRTUALIP_ENABLED" != "yes" ]; then
            echo "$DAEMON is disabled" 1>&2
            exit 1;
        fi

        start
        ;;
    start)
        start
        ;;

    stop)
        stop
        ;;
    unload)
        stop
        modunreg cgi 'virtualip'
        ;;
    restart)
        stop
        start
        ;;
    status)
        if [ -z "`ifconfig | grep "$VIRTUALIP_INTERFACE"`" ]; then
            echo 'stopped'
        else
            echo 'running'
        fi
        ;;
    *)
        echo "Usage: $0 [load|unload|start|stop|restart|status]" 1>&2
        exit 1
        ;;
esac

exit 0