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#!/bin/bash
#
# Module: vyatta-clear-firewall
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2006-2009 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Mohit Mehta
# Date: February 2009
# Description: Script to clear firewall counters
#
# **** End License ****
#
print_usage()
{
echo "Usage:"
echo -e "\t$0 iptables/ip6tables table-name chain-name [rule-num]"
}
clear_chain() {
sudo $iptables_cmd -t $table_name -Z $chain_name 2>/dev/null
result=`echo $?`
if [ $result != 0 ]; then
echo Invalid $ip_version firewall $cli_tree chain \'$chain_name\'
exit 1
fi
}
clear_chain_rule() {
result=`sudo $iptables_cmd -t $table_name -L $chain_name 2>/dev/null`
result=`echo $?`
if [ $result != 0 ]; then
echo Invalid $ip_version firewall $cli_tree chain \'$chain_name\'
exit 1
else
iptables_rule_num=( `sudo $iptables_cmd -t $table_name -L $chain_name \
--line-numbers | grep "/\* $chain_name-$rule_num " | awk '{ print $1 }'` )
num_iptables_rules=${#iptables_rule_num[*]}
if [ $num_iptables_rules != 0 ]; then
i=0
while [ $i -lt $num_iptables_rules ]; do
sudo $iptables_cmd -t $table_name -Z $chain_name ${iptables_rule_num[$i]}
let i++
done
else
echo No \'rule $rule_num\' under $ip_version firewall $cli_tree chain \'$chain_name\'
exit 1
fi
fi
}
#
# main
#
if [ $# -lt 3 ]; then
print_usage
exit 1
fi
iptables_cmd=$1
table_name=$2
chain_name=$3
rule_num=$4
ip_version="IPv4"
cli_tree="name"
if [[ '/sbin/ip6tables' =~ $iptables_cmd ]]; then
ip_version="IPv6"
fi
if [[ 'mangle' =~ $table_name ]]; then
cli_tree="modify"
fi
if [ -n "$rule_num" ]; then
clear_chain_rule
else
clear_chain
fi
exit 0
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