diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | conf.d.Linux/net.example | 7 | ||||
| -rw-r--r-- | net.Linux/arping.sh | 57 |
3 files changed, 45 insertions, 24 deletions
@@ -1,6 +1,11 @@ # ChangeLog for Gentoo System Intialization ("rc") scripts # Copyright 1999-2007 Gentoo Foundation; Distributed under the GPLv2 + 30 Oct 2007; Roy Marples <uberlord@gentoo.org>: + + You can now spoof the source address for arping as the third parameter + in gateways_eth0 if you have arping2 installed, #180888. + 29 Oct 2007; Roy Marples <uberlord@gentoo.org>: rc --override foo will override the runlevel to load after boot diff --git a/conf.d.Linux/net.example b/conf.d.Linux/net.example index ed69d13d..c2d4b371 100644 --- a/conf.d.Linux/net.example +++ b/conf.d.Linux/net.example @@ -528,6 +528,13 @@ #routes_010000000001_334455DDEEFF="default via 10.0.0.1" #dns_servers_010000000001_334455DDEEFF="10.0.0.1" +# If you need to spoof the source address, you can add that as third parameter +# like so +#gateways_eth0="192.168.0.1,00:11:22:AA:BB:CC,192.168.0.50" +#or +#gateways_eth0="192.168.0.1,,192.168.0.50" +# This requires arping to be installed though + # If we don't find any gateways (or there are none configured) then we try and # use APIPA to find a free address in the range 169.254.0.0-169.254.255.255 # by arping a random address in that range on the interface. If no reply is diff --git a/net.Linux/arping.sh b/net.Linux/arping.sh index 68d04216..4bfb151c 100644 --- a/net.Linux/arping.sh +++ b/net.Linux/arping.sh @@ -2,12 +2,12 @@ # Distributed under the terms of the GNU General Public License v2 arping_depend() { - program /sbin/arping + program /sbin/arping /usr/sbin/arping2 before interface } arping_address() { - local ip=${1%%/*} mac="$2" foundmac= i= w= opts= + local ip=${1%%/*} mac="$2" spoof="$3" foundmac= i= w= opts= # We only handle IPv4 addresses case "${ip}" in @@ -23,10 +23,20 @@ arping_address() { eval w=\$arping_wait_${IFVAR} [ -z "${w}" ] && w=${arping_wait:-5} - [ -z "$(_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')" + if type arping2 >/dev/null 2>&1; then + [ -z "$(_get_inet_address)" ] && opts="${opts} -0" + [ -n "${spoof}" ] && opts="${opts} -S ${spoof}" + while [ ${w} -gt 0 -a -z "${foundmac}" ]; do + foundmac="$(arping2 ${opts} -r -c 1 -0 -i "${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 @@ -41,7 +51,7 @@ arping_address() { _arping_in_config() { _get_array "config_${IFVAR}" | while read i; do - [ "${i}" = "arping" ] && return 0 + [ "${i}" = "arping" ] && return 1 done return 1 } @@ -51,7 +61,7 @@ arping_start() { einfo "Pinging gateways on ${IFACE} for configuration" eval gateways=\$gateways_${IFVAR} - if [ -n "${gateways}" ] ; then + if [ -z "${gateways}" ] ; then eerror "No gateways have been defined (gateways_${IFVAR}=\"...\")" return 1 fi @@ -61,7 +71,7 @@ arping_start() { for x in ${gateways}; do local IFS=, set -- ${x} - local ip=$1 mac=$2 extra= + local ip=$1 mac=$2 spoof=$3 extra= unset IFS if [ -n "${mac}" ] ; then @@ -70,9 +80,8 @@ arping_start() { fi vebegin "${ip} ${extra}" - if arping_address "${ip}" "${mac}" ; then - local OIFS=$IFS SIFS=${IFS-y} - IFS=. + if arping_address "${ip}" "${mac}" "${spoof}" ; then + local IFS=. for i in ${ip} ; do if [ "${#i}" = "2" ] ; then conf="${conf}0${i}" @@ -82,28 +91,28 @@ arping_start() { conf="${conf}${i}" fi done - if [ "${SIFS}" = "y" ] ; then - IFS=$OFIS - else - unset IFS - fi + unset IFS [ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')" - veend 0 + eend 0 eoutdent veinfo "Configuring ${IFACE} for ${ip} ${extra}" - _configure_variables "${conf}" + _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 - if _arping_in_config; then - veend 1 "No config found for ${ip} (config_${conf}=\"...\")" - continue 2 - fi - + 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 |