645bbf2e0f
ARP replies may/do contain two MAC addresses when using iputils's arping so we have to use the first one because it's always the "From" address - which is what we want. Thanks to Stefan Knoblich <s.knoblich@axsentis.de> for the fixed pattern. Reported-by: cl@exomail.to X-Gentoo-Bug: 379181 X-Gentoo-Bug-URL: https://bugs.gentoo.org/379181
132 lines
2.8 KiB
Bash
132 lines
2.8 KiB
Bash
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
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# Released under the 2-clause BSD license.
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arping_depend()
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{
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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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{
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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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0.0.0.0|0) return 1;;
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*.*.*.*);;
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*) return 1;;
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esac
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# We need to bring the interface up to test
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_exists "${iface}" || return 1
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_up "${iface}"
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eval w=\$arping_wait_${IFVAR}
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[ -z "${w}" ] && w=${arping_wait:-5}
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if type arping2 >/dev/null 2>&1; then
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if [ -n "${spoof}" ]; then
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opts="${opts} -S ${spoof}"
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else
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[ -z "$(_get_inet_address)" ] && opts="${opts} -0"
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fi
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while [ ${w} -gt 0 -a -z "${foundmac}" ]; do
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foundmac="$(arping2 ${opts} -r -c 1 -i "${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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fi
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[ -z "${foundmac}" ] && return 1
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if [ -n "${mac}" ]; then
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if [ "${mac}" != "${foundmac}" ]; then
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vewarn "Found ${ip} but MAC ${foundmac} does not match"
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return 1
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fi
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fi
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return 0
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}
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_arping_in_config()
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{
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_get_array "config_${IFVAR}" | while read i; do
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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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arping_start()
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{
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local gateways= x= conf= i=
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einfo "Pinging gateways on ${IFACE} for configuration"
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eval gateways=\$gateways_${IFVAR}
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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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eindent
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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 spoof=$3 extra=
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unset IFS
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if [ -n "${mac}" ]; then
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mac="$(echo "${mac}" | tr '[:lower:]' '[:upper:]')"
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extra="(MAC ${mac})"
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fi
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vebegin "${ip} ${extra}"
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if arping_address "${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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elif [ "${#i}" = "1" ]; then
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conf="${conf}00${i}"
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else
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conf="${conf}${i}"
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fi
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done
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unset IFS
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[ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')"
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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 ${conf}
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# Call the system module as we've aleady passed it by ....
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# And it *has* to be pre_start for other things to work correctly
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system_pre_start
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# Ensure that we have a valid config - ie arping is no longer there
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local IFS="$__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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veend 1
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done
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eoutdent
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return 1
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}
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