# Copyright 2007-2008 Roy Marples # All rights reserved. Released under the 2-clause BSD license. arping_depend() { program /sbin/arping /usr/sbin/arping2 before interface } arping_address() { local ip=${1%%/*} mac="$2" spoof="$3" foundmac= i= w= opts= # We only handle IPv4 addresses case "${ip}" in 0.0.0.0|0) return 1;; *.*.*.*);; *) return 1;; esac # We need to bring the interface up to test _exists "${iface}" || return 1 _up "${iface}" eval w=\$arping_wait_${IFVAR} [ -z "${w}" ] && w=${arping_wait:-5} if type arping2 >/dev/null 2>&1; then if [ -n "${spoof}" ]; then opts="${opts} -S ${spoof}" else [ -z "$(_get_inet_address)" ] && opts="${opts} -0" fi while [ ${w} -gt 0 -a -z "${foundmac}" ]; do foundmac="$(arping2 ${opts} -r -c 1 -i "${IFACE}" "${ip}" 2>/dev/null | \ sed -e 'y/abcdef/ABCDEF/')" w=$((${w} - 1)) done else [ -z "$(_get_inet_address)" ] && opts="${opts} -D" foundmac="$(arping -w "${w}" ${opts} -f -I "${IFACE}" "${ip}" 2>/dev/null | \ sed -n -e 'y/abcdef/ABCDEF/' -e 's/.*\[\([^]]*\)\].*/\1/p')" fi [ -z "${foundmac}" ] && return 1 if [ -n "${mac}" ]; then if [ "${mac}" != "${foundmac}" ]; then vewarn "Found ${ip} but MAC ${foundmac} does not match" return 1 fi fi return 0 } _arping_in_config() { _get_array "config_${IFVAR}" | while read i; do [ "${i}" = "arping" ] && return 1 done return 1 } arping_start() { local gateways= x= conf= i= einfo "Pinging gateways on ${IFACE} for configuration" eval gateways=\$gateways_${IFVAR} if [ -z "${gateways}" ]; then eerror "No gateways have been defined (gateways_${IFVAR}=\"...\")" return 1 fi eindent for x in ${gateways}; do local IFS=, set -- ${x} local ip=$1 mac=$2 spoof=$3 extra= unset IFS if [ -n "${mac}" ]; then mac="$(echo "${mac}" | tr '[:lower:]' '[:upper:]')" extra="(MAC ${mac})" fi vebegin "${ip} ${extra}" if arping_address "${ip}" "${mac}" "${spoof}"; then local IFS=. for i in ${ip}; do if [ "${#i}" = "2" ]; then conf="${conf}0${i}" elif [ "${#i}" = "1" ]; then conf="${conf}00${i}" else conf="${conf}${i}" fi done unset IFS [ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')" eend 0 eoutdent veinfo "Configuring ${IFACE} for ${ip} ${extra}" _configure_variables ${conf} # Call the system module as we've aleady passed it by .... # And it *has* to be pre_start for other things to work correctly system_pre_start # Ensure that we have a valid config - ie arping is no longer there local IFS="$__IFS" for i in $(_get_array "config_${IFVAR}"); do if [ "${i}" = "arping" ]; then eend 1 "No config found for ${ip} (config_${conf}=\"...\")" continue 2 fi done unset IFS _load_config return 0 fi veend 1 done eoutdent return 1 }