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#!/sbin/openrc-run
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
extra_commands="save panic"
extra_started_commands="reload"
ebtables_bin="/sbin/ebtables"
ebtables_save=${EBTABLES_SAVE}
depend() {
before net
use logger
}
ebtables_tables() {
for table in filter nat broute; do
if ${ebtables_bin} -t ${table} -L > /dev/null 2>&1; then
printf '%s' "${table} "
fi
done
}
set_table_policy() {
local chains table=$1 policy=$2
case ${table} in
nat) chains="PREROUTING POSTROUTING OUTPUT";;
broute) chains="BROUTING";;
filter) chains="INPUT FORWARD OUTPUT";;
*) chains="";;
esac
local chain
for chain in ${chains} ; do
${ebtables_bin} -t ${table} -P ${chain} ${policy}
done
}
checkconfig() {
if [ ! -f ${ebtables_save} ] ; then
eerror "Not starting ebtables. First create some rules then run:"
eerror "/etc/init.d/ebtables save"
return 1
fi
return 0
}
start() {
checkconfig || return 1
ebegin "Loading ebtables state and starting bridge firewall"
${ebtables_bin}-restore ${SAVE_RESTORE_OPTIONS} < "${ebtables_save}"
eend $?
}
stop() {
if [ "${SAVE_ON_STOP}" = "yes" ] ; then
save || return 1
fi
ebegin "Stopping bridge firewall"
local a
for a in $(ebtables_tables); do
set_table_policy $a ACCEPT
${ebtables_bin} -t $a -F
${ebtables_bin} -t $a -X
done
eend $?
}
reload() {
ebegin "Flushing bridge firewall"
local a
for a in $(ebtables_tables); do
${ebtables_bin} -t $a -F
${ebtables_bin} -t $a -X
done
eend $?
start
}
save() {
ebegin "Saving ebtables state"
touch "${ebtables_save}"
chmod 0600 "${ebtables_save}"
${ebtables_bin}-save $(ebtables_tables) ${SAVE_RESTORE_OPTIONS} > "${ebtables_save}"
eend $?
}
panic() {
service_started ebtables && svc_stop
local a
ebegin "Dropping all packets forwarded on bridges"
for a in $(ebtables_tables); do
${ebtables_bin} -t $a -F
${ebtables_bin} -t $a -X
set_table_policy $a DROP
done
eend $?
}
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