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authorMolly Miller <adelie@m-squa.red>2019-07-06 01:36:16 +0000
committerMolly Miller <adelie@m-squa.red>2019-07-06 01:36:16 +0000
commit57b7d813c73fdc7f3c3254e7107ffa045db12702 (patch)
tree5cb5cb16da7761bfc95923413290bc462c5afc18 /user/iptables/iptables.initd
parent1428865cd0d40ead37696cd26ed9e2cf46845f32 (diff)
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user/iptables: new package
There is some optional functionality available which requires further libraries (libmnl for the ability to work over nf_tables as opposed to the legacy ip{,6}_tables kernel module, libnetfilter_conntrack for connlabel matching), but these libraries aren't yet packaged.
Diffstat (limited to 'user/iptables/iptables.initd')
-rw-r--r--user/iptables/iptables.initd136
1 files changed, 136 insertions, 0 deletions
diff --git a/user/iptables/iptables.initd b/user/iptables/iptables.initd
new file mode 100644
index 000000000..98b52d0cd
--- /dev/null
+++ b/user/iptables/iptables.initd
@@ -0,0 +1,136 @@
+#!/sbin/openrc-run
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/net-firewall/iptables/files/iptables-1.4.11.init,v 1.2 2011/12/04 10:15:59 swegener Exp $
+
+description="IPv4/IPv6 packet filtering and NAT"
+description_save="Save firewall state"
+description_panic="Drop all packets"
+description_reload="Reload configuration"
+
+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}
+ sysctl_ipfwd=net.ipv4.ip_forward;;
+ ip6tables) iptables_proc="/proc/net/ip6_tables_names"
+ iptables_save=${IP6TABLES_SAVE}
+ sysctl_ipfwd=net.ipv6.conf.all.forwarding;;
+esac
+
+depend() {
+ before net
+ after sysctl
+ use logger
+ provide firewall
+}
+
+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 $?
+ if yesno "${IPFORWARD}"; then
+ ebegin "Enabling forwarding"
+ /sbin/sysctl -w ${sysctl_ipfwd}=1 > /dev/null
+ eend $?
+ fi
+}
+
+stop() {
+ if yesno "${IPFORWARD}"; then
+ ebegin "Disabling forwarding"
+ /sbin/sysctl -w ${sysctl_ipfwd}=0 > /dev/null
+ eend $?
+ fi
+ if yesno "${SAVE_ON_STOP}"; 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 $?
+}