#!/sbin/openrc-run # Copyright 1999-2018 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 extra_commands="check save panic" extra_started_commands="reload" iptables_lock_wait_time=${IPTABLES_LOCK_WAIT_TIME:-"60"} iptables_lock_wait_interval=${IPTABLES_LOCK_WAIT_INTERVAL:-"1000"} iptables_name=${SVCNAME} case ${iptables_name} in iptables|ip6tables) ;; *) iptables_name="iptables" ;; esac iptables_bin="/sbin/${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() { need localmount #434774 before net } set_table_policy() { local has_errors=0 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} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -t ${table} -P ${chain} ${policy} [ $? -ne 0 ] && has_errors=1 done return ${has_errors} } checkkernel() { if [ ! -e ${iptables_proc} ] ; then eerror "Your kernel lacks ${iptables_name} support, please load" eerror "appropriate modules and try again." return 1 fi return 0 } checkconfig() { if [ -z "${iptables_save}" -o ! -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_pre() { checkconfig || return 1 } start() { ebegin "Loading ${iptables_name} state and starting firewall" ${iptables_bin}-restore --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} ${SAVE_RESTORE_OPTIONS} < "${iptables_save}" eend $? } stop_pre() { checkkernel || return 1 } stop() { if [ "${SAVE_ON_STOP}" = "yes" ] ; then save || return 1 fi ebegin "Stopping firewall" local has_errors=0 a for a in $(cat ${iptables_proc}) ; do set_table_policy $a ACCEPT [ $? -ne 0 ] && has_errors=1 ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a [ $? -ne 0 ] && has_errors=1 ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a [ $? -ne 0 ] && has_errors=1 done eend ${has_errors} } reload() { checkkernel || return 1 checkrules || return 1 ebegin "Flushing firewall" local has_errors=0 a for a in $(cat ${iptables_proc}) ; do ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a [ $? -ne 0 ] && has_errors=1 ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a [ $? -ne 0 ] && has_errors=1 done eend ${has_errors} start } checkrules() { ebegin "Checking rules" ${iptables_bin}-restore --test ${SAVE_RESTORE_OPTIONS} < "${iptables_save}" eend $? } check() { # Short name for users of init.d script. checkrules } save() { ebegin "Saving ${iptables_name} state" checkpath -q -d "$(dirname "${iptables_save}")" checkpath -q -m 0600 -f "${iptables_save}" ${iptables_bin}-save ${SAVE_RESTORE_OPTIONS} > "${iptables_save}" eend $? } panic() { # use iptables autoload capability to load at least all required # modules and filter table ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -S >/dev/null if [ $? -ne 0 ] ; then eerror "${iptables_bin} failed to load" return 1 fi if service_started ${iptables_name}; then rc-service ${iptables_name} stop fi local has_errors=0 a ebegin "Dropping all packets" for a in $(cat ${iptables_proc}) ; do ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a [ $? -ne 0 ] && has_errors=1 ${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a [ $? -ne 0 ] && has_errors=1 if [ "${a}" != "nat" ]; then # The "nat" table is not intended for filtering, the use of DROP is therefore inhibited. set_table_policy $a DROP [ $? -ne 0 ] && has_errors=1 fi done eend ${has_errors} }