10-ipset

#!/bin/sh

# This file is part of netfilter-persistent
# (was iptables-persistent)
# Copyright (C) 2009, Simon Richter <sjr@debian.org>
# Copyright (C) 2010, 2014 Jonathan Wiltshire <jmw@debian.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 3
# of the License, or (at your option) any later version.

set -e

rc=0

load_rules()
{
	#load IPSet rules
	if [ ! -f /etc/iptables/rules.ipset ]; then
		echo "Warning: skipping IPSet (no rules to load)"
	else
		ipset restore -! < /etc/iptables/rules.ipset 2> /dev/null
		if [ $? -ne 0 ]; then
			rc=1
		fi
	fi
}

save_rules()
{
	#save IPSet rules
	#need at least ip_set loaded:
	/sbin/modprobe -q ip_set
	if [ -x /sbin/ipset ]; then
		touch /etc/iptables/rules.ipset
		chmod 0640 /etc/iptables/rules.ipset
		ipset save | grep -iv "f2b" > /etc/iptables/rules.ipset
		if [ $? -ne 0 ]; then
			rc=1
		fi
	fi
}

flush_rules()
{
	if [ -x /sbin/ipset ]; then
		ipset flush
	fi
}

case "$1" in
start|restart|reload|force-reload)
	load_rules
	;;
save)
	save_rules
	;;
stop)
	# Why? because if stop is used, the firewall gets flushed for a variable
	# amount of time during package upgrades, leaving the machine vulnerable
	# It's also not always desirable to flush during purge
	echo "Automatic flushing disabled, use \"flush\" instead of \"stop\""
	;;
flush)
	flush_rules
	;;
*)
    echo "Usage: $0 {start|restart|reload|force-reload|save|flush}" >&2
    exit 1
    ;;
esac

exit $rc