source: lsb-bootscripts/lib/network-services/ipv4-static@ 5de4ea07

#!/bin/sh
########################################################################
# Begin /lib/network-services/ipv4-static
#
# Description : IPV4 Static Boot Script
#
# Authors     : Nathan Coulson - nathan@linuxfromscratch.org
#               Kevin P. Fleming - kpfleming@linuxfromscratch.org
#
# Version     : 00.00
#
# Notes       :
#
########################################################################

. /lib/lsb/init-functions
. ${IFCONFIG}

if [ -z "${IP}" ]; then
        log_failure_msg "IP variable missing from ${IFCONFIG}, cannot continue."
        exit 1
fi

if [ -z "${PREFIX}" -a -z "${PEER}" ]; then
        log_warning_msg "PREFIX variable missing from ${IFCONFIG}, assuming 24."
        PREFIX=24
        args="${args} ${IP}/${PREFIX}"
elif [ -n "${PREFIX}" -a -n "${PEER}" ]; then
        log_failure_msg "PREFIX and PEER both specified in ${IFCONFIG}, cannot continue."
        exit 1
elif [ -n "${PREFIX}" ]; then
        args="${args} ${IP}/${PREFIX}"
elif [ -n "${PEER}" ]; then
        args="${args} ${IP} peer ${PEER}"
fi

if [ -n "${BROADCAST}" ]; then
        args="${args} broadcast ${BROADCAST}"
fi

if [ -n "${SOURCE}" ]; then
        args="${args} src ${SOURCE}"
fi

case "${2}" in
        up)
                MESSAGE="Adding IPv4 address ${IP} to the ${1} interface..."
                ip addr add ${args} dev ${1}
                evaluate_retval
        
                if [ -n "${GATEWAY}" ]; then
                        if ip route | grep -q default; then
                                log_warning_msg "Gateway already setup; skipping." ${WARNING}
                        else
                                MESSAGE="Setting up default gateway..."
                                ip route add default via ${GATEWAY} dev ${1}
                                evaluate_retval
                         fi
                fi
        ;;
        
        down)
                if [ -n "${GATEWAY}" ]; then
                        MESSAGE="Removing default gateway..."
                        ip route del default
                        evaluate_retval
                fi
        
                MESSAGE="Removing IPv4 address ${IP} from the ${1} interface..."
                ip addr del ${args} dev ${1}
                evaluate_retval
        ;;
        
        *)
                echo "Usage: ${0} [interface] {up|down}"
                exit 1
        ;;
esac

# End /lib/network-services/ipv4-static