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-rw-r--r--net/arping.sh131
1 files changed, 131 insertions, 0 deletions
diff --git a/net/arping.sh b/net/arping.sh
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+++ b/net/arping.sh
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+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# 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
+}