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#!/usr/bin/perl
# Module: vyatta-gateway-static_route-check.pl
#
# **** 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.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Mohit Mehta
# Date: June 2008
# Description: Script to check if any one of the 'static route' is
# equivalent to the 'system gateway-address' if yes, then
# don't remove route from routing table unless both are
# unset
# **** End License ****
use strict;
use warnings;
use lib "/opt/vyatta/share/perl5/";
use Vyatta::Config;
sub findStaticDefaultRoute {
my ( $cfg ) = @_;
if ($cfg->exists('protocols static')) {
my @routes = $cfg->listNodes("protocols static route");
if (@routes > 0) {
foreach my $route (@routes) {
if ($route eq '0.0.0.0/0') {
return 1;
}
}
}
}
return 0;
}
if ( ( $#ARGV == 1 ) && ( $ARGV[0] eq '0.0.0.0/0' ) ) {
# check when deleting static-route
my $vcCHECK_GATEWAY = new Vyatta::Config();
$vcCHECK_GATEWAY->setLevel('system');
if ( $vcCHECK_GATEWAY->exists('.') ) {
my $gateway_ip = $vcCHECK_GATEWAY->returnValue('gateway-address');
if ( defined($gateway_ip) && $gateway_ip eq $ARGV[1] ) {
exit 1;
}
}
} elsif ( $#ARGV == 0 ) {
if ($ARGV[0] eq 'warn') {
my $config = new Vyatta::Config();
my $haveGatewayAddress = $config->exists("system gateway-address");
my $haveStaticDefaultRoute = findStaticDefaultRoute($config);
if ($haveGatewayAddress && $haveStaticDefaultRoute) {
print "Warning:\n";
print "Both 'system gateway-address' and 'protocols static route 0.0.0.0/0'\n";
print "are configured. This configuration is not recommended.\n";
}
} else {
# check when deleting gateway-address
my $vcCHECK_STATIC_ROUTE = new Vyatta::Config();
$vcCHECK_STATIC_ROUTE->setLevel('protocols static');
if ( $vcCHECK_STATIC_ROUTE->exists('.') ) {
my @routes = $vcCHECK_STATIC_ROUTE->listNodes("route");
if ( @routes > 0 ) {
foreach my $route (@routes) {
if ( $route eq '0.0.0.0/0' ) {
my @next_hops =
$vcCHECK_STATIC_ROUTE->listNodes("route $route next-hop");
foreach my $next_hop (@next_hops) {
if ( $next_hop eq $ARGV[0] ) {
exit 1;
}
}
}
}
}
}
}
}
exit 0;
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