You can now spoof the source address for arping as the third parameter in gateways_eth0 if you have arping2 installed, #180888.
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Roy Marples
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@ -1,6 +1,11 @@
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# ChangeLog for Gentoo System Intialization ("rc") scripts
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# Copyright 1999-2007 Gentoo Foundation; Distributed under the GPLv2
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30 Oct 2007; Roy Marples <uberlord@gentoo.org>:
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You can now spoof the source address for arping as the third parameter
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in gateways_eth0 if you have arping2 installed, #180888.
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29 Oct 2007; Roy Marples <uberlord@gentoo.org>:
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rc --override foo will override the runlevel to load after boot
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@ -528,6 +528,13 @@
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#routes_010000000001_334455DDEEFF="default via 10.0.0.1"
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#dns_servers_010000000001_334455DDEEFF="10.0.0.1"
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# If you need to spoof the source address, you can add that as third parameter
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# like so
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#gateways_eth0="192.168.0.1,00:11:22:AA:BB:CC,192.168.0.50"
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#or
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#gateways_eth0="192.168.0.1,,192.168.0.50"
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# This requires arping to be installed though
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# If we don't find any gateways (or there are none configured) then we try and
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# use APIPA to find a free address in the range 169.254.0.0-169.254.255.255
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# by arping a random address in that range on the interface. If no reply is
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@ -2,12 +2,12 @@
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# Distributed under the terms of the GNU General Public License v2
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arping_depend() {
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program /sbin/arping
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program /sbin/arping /usr/sbin/arping2
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before interface
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}
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arping_address() {
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local ip=${1%%/*} mac="$2" foundmac= i= w= opts=
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local ip=${1%%/*} mac="$2" spoof="$3" foundmac= i= w= opts=
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# We only handle IPv4 addresses
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case "${ip}" in
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@ -23,10 +23,20 @@ arping_address() {
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eval w=\$arping_wait_${IFVAR}
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[ -z "${w}" ] && w=${arping_wait:-5}
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[ -z "$(_get_inet_address)" ] && opts="${opts} -D"
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if type arping2 >/dev/null 2>&1; then
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[ -z "$(_get_inet_address)" ] && opts="${opts} -0"
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[ -n "${spoof}" ] && opts="${opts} -S ${spoof}"
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while [ ${w} -gt 0 -a -z "${foundmac}" ]; do
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foundmac="$(arping2 ${opts} -r -c 1 -0 -i "${IFACE}" "${ip}" 2>/dev/null | \
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sed -e 'y/abcdef/ABCDEF/')"
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w=$((${w} - 1))
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done
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else
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[ -z "$(_get_inet_address)" ] && opts="${opts} -D"
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foundmac="$(arping -w "${w}" ${opts} -f -I "${IFACE}" "${ip}" 2>/dev/null | \
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sed -n -e 'y/abcdef/ABCDEF/' -e 's/.*\[\([^]]*\)\].*/\1/p')"
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foundmac="$(arping -w "${w}" ${opts} -f -I "${IFACE}" "${ip}" 2>/dev/null | \
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sed -n -e 'y/abcdef/ABCDEF/' -e 's/.*\[\([^]]*\)\].*/\1/p')"
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fi
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[ -z "${foundmac}" ] && return 1
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if [ -n "${mac}" ] ; then
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@ -41,7 +51,7 @@ arping_address() {
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_arping_in_config() {
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_get_array "config_${IFVAR}" | while read i; do
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[ "${i}" = "arping" ] && return 0
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[ "${i}" = "arping" ] && return 1
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done
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return 1
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}
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@ -51,7 +61,7 @@ arping_start() {
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einfo "Pinging gateways on ${IFACE} for configuration"
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eval gateways=\$gateways_${IFVAR}
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if [ -n "${gateways}" ] ; then
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if [ -z "${gateways}" ] ; then
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eerror "No gateways have been defined (gateways_${IFVAR}=\"...\")"
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return 1
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fi
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@ -61,7 +71,7 @@ arping_start() {
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for x in ${gateways}; do
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local IFS=,
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set -- ${x}
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local ip=$1 mac=$2 extra=
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local ip=$1 mac=$2 spoof=$3 extra=
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unset IFS
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if [ -n "${mac}" ] ; then
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@ -70,9 +80,8 @@ arping_start() {
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fi
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vebegin "${ip} ${extra}"
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if arping_address "${ip}" "${mac}" ; then
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local OIFS=$IFS SIFS=${IFS-y}
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IFS=.
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if arping_address "${ip}" "${mac}" "${spoof}" ; then
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local IFS=.
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for i in ${ip} ; do
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if [ "${#i}" = "2" ] ; then
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conf="${conf}0${i}"
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@ -82,28 +91,28 @@ arping_start() {
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conf="${conf}${i}"
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fi
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done
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if [ "${SIFS}" = "y" ] ; then
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IFS=$OFIS
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else
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unset IFS
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fi
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unset IFS
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[ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')"
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veend 0
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eend 0
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eoutdent
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veinfo "Configuring ${IFACE} for ${ip} ${extra}"
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_configure_variables "${conf}"
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_configure_variables ${conf}
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# Call the system module as we've aleady passed it by ....
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# And it *has* to be pre_start for other things to work correctly
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system_pre_start
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# Ensure that we have a valid config - ie arping is no longer there
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if _arping_in_config; then
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veend 1 "No config found for ${ip} (config_${conf}=\"...\")"
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continue 2
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fi
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local IFS="$__IFS"
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for i in $(_get_array "config_${IFVAR}"); do
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if [ "${i}" = "arping" ]; then
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eend 1 "No config found for ${ip} (config_${conf}=\"...\")"
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continue 2
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fi
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done
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unset IFS
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_load_config
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return 0
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fi
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