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#!/sbin/runscript
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
extra_commands="save panic"
extra_started_commands="reload"
iptables_name=${SVCNAME}
if [ "${iptables_name}" != "iptables" -a "${iptables_name}" != "ip6tables" ] ; then
iptables_name="iptables"
fi
iptables_bin="/sbin/${iptables_name}"
case ${iptables_name} in
iptables) iptables_proc="/proc/net/ip_tables_names"
iptables_save=${IPTABLES_SAVE};;
ip6tables) iptables_proc="/proc/net/ip6_tables_names"
iptables_save=${IP6TABLES_SAVE};;
esac
depend() {
before net
}
set_table_policy() {
local chains table=$1 policy=$2
case ${table} in
nat) chains="PREROUTING POSTROUTING OUTPUT";;
mangle) chains="PREROUTING INPUT FORWARD OUTPUT POSTROUTING";;
filter) chains="INPUT FORWARD OUTPUT";;
*) chains="";;
esac
local chain
for chain in ${chains} ; do
${iptables_bin} -t ${table} -P ${chain} ${policy}
done
}
checkkernel() {
if [ ! -e ${iptables_proc} ] ; then
eerror "Your kernel lacks ${iptables_name} support, please load"
eerror "appropriate modules and try again."
return 1
fi
return 0
}
checkconfig() {
if [ ! -f ${iptables_save} ] ; then
eerror "Not starting ${iptables_name}. First create some rules then run:"
eerror "/etc/init.d/${iptables_name} save"
return 1
fi
return 0
}
start() {
checkconfig || return 1
ebegin "Loading ${iptables_name} state and starting firewall"
${iptables_bin}-restore ${SAVE_RESTORE_OPTIONS} < "${iptables_save}"
eend $?
}
stop() {
if [ "${SAVE_ON_STOP}" = "yes" ] ; then
save || return 1
fi
checkkernel || return 1
ebegin "Stopping firewall"
local a
for a in $(cat ${iptables_proc}) ; do
set_table_policy $a ACCEPT
${iptables_bin} -F -t $a
${iptables_bin} -X -t $a
done
eend $?
}
reload() {
checkkernel || return 1
ebegin "Flushing firewall"
local a
for a in $(cat ${iptables_proc}) ; do
${iptables_bin} -F -t $a
${iptables_bin} -X -t $a
done
eend $?
start
}
save() {
ebegin "Saving ${iptables_name} state"
touch "${iptables_save}"
chmod 0600 "${iptables_save}"
${iptables_bin}-save ${SAVE_RESTORE_OPTIONS} > "${iptables_save}"
eend $?
}
panic() {
checkkernel || return 1
if service_started ${iptables_name}; then
rc-service ${iptables_name} stop
fi
local a
ebegin "Dropping all packets"
for a in $(cat ${iptables_proc}) ; do
${iptables_bin} -F -t $a
${iptables_bin} -X -t $a
set_table_policy $a DROP
done
eend $?
}
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