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#!/usr/bin/perl -w
#
# Module: vyatta-wanloadbalance.pl
#
# **** License ****
# Version: VPL 1.0
#
# The contents of this file are subject to the Vyatta Public License
# Version 1.0 ("License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.vyatta.com/vpl
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and limitations
# under the License.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Michael Larson
# Date: January 2008
# Description: Writes exclusion list for linkstatus
#
# **** End License ****
#
use lib "/opt/vyatta/share/perl5/";
use VyattaConfig;
use VyattaMisc;
use warnings;
use strict;
use POSIX;
use File::Copy;
sub write_health {
#open conf
my $config = new VyattaConfig;
$config->setLevel("load-balancing wan interface-health");
my @eths = $config->listNodes();
print FILE_LCK "health {\n";
foreach my $ethNode (@eths) {
print FILE_LCK "\tinterface " . $ethNode . " {\n";
my $option = $config->returnValue("$ethNode failure-count");
if (defined $option) {
print FILE_LCK "\t\tfailure-ct " . $option . "\n";
}
$option = $config->returnValue("$ethNode ping");
if (defined $option) {
print FILE_LCK "\t\ttarget " . $option . "\n";
}
$option = $config->returnValue("$ethNode resp-time");
if (defined $option) {
print FILE_LCK "\t\tping-resp " . $option*1000 . "\n";
}
$option = $config->returnValue("$ethNode success-count");
if (defined $option) {
print FILE_LCK "\t\tsuccess-ct " . $option . "\n";
}
print FILE_LCK "\t}\n";
}
print FILE_LCK "}\n\n";
}
sub write_rules {
my $config = new VyattaConfig;
$config->setLevel('load-balancing wan rule');
my @rules = $config->listNodes();
#destination
foreach my $rule (@rules) {
print FILE_LCK "rule " . $rule . " {\n";
$config->setLevel('load-balancing wan rule');
my $protocol = $config->returnValue("$rule protocol");
if (defined $protocol) {
print FILE_LCK "\tprotocol " . $protocol . "\n"
}
else {
$protocol = "";
}
#destination
print FILE_LCK "\tdestination {\n";
my $daddr = $config->returnValue("$rule destination address");
if (defined $daddr) {
print FILE_LCK "\t\taddress " . $daddr . "\n";
}
my $dnet = $config->returnValue("$rule destination network");
if (defined $dnet && !defined $daddr) {
print FILE_LCK "\t\tnetwork " . $dnet . "\n";
}
elsif (defined $dnet && defined $daddr) {
print "Please specify either destination address or source network\n";
exit 2;
}
my $option = $config->returnValue("$rule destination port");
if (defined $option) {
if ($protocol ne "tcp" && $protocol ne "udp") {
print "Please specify protocol tcp or udp when configuring ports\n";
exit 2;
}
print FILE_LCK "\t\tport " . $option . "\n";
}
print FILE_LCK "\t}\n";
#source
$config->setLevel('load-balancing wan rule');
print FILE_LCK "\tsource {\n";
my $saddr = $config->returnValue("$rule source address");
if (defined $saddr) {
print FILE_LCK "\t\taddress " . $saddr . "\n";
}
my $snet = $config->returnValue("$rule source network");
if (defined $snet && !defined $saddr) {
print FILE_LCK "\t\tnetwork " . $snet . "\n";
}
elsif (defined $snet && defined $saddr) {
print "Please specify either source address or source network\n";
exit 2;
}
$option = $config->returnValue("$rule source port");
if (defined $option) {
if ($protocol ne "tcp" && $protocol ne "udp") {
print "Please specify protocol tcp or udp when configuring ports\n";
exit 2;
}
print FILE_LCK "\t\tport " . $option . "\n";
}
print FILE_LCK "\t}\n";
#interface
$config->setLevel("load-balancing wan rule $rule interface");
my @eths = $config->listNodes();
foreach my $ethNode (@eths) {
print FILE_LCK "\tinterface " . $ethNode . " {\n";
$option = $config->returnValue("$ethNode weight");
if (defined $option) {
print FILE_LCK "\t\tweight " . $option . "\n";
}
print FILE_LCK "\t}\n";
}
print FILE_LCK "}\n";
}
}
####main
my $conf_file = '/var/load-balance/wlb.conf';
my $conf_lck_file = '/var/load-balance/wlb.conf.lck';
#open file
open(FILE, "<$conf_file") or die "Can't open wlb config file";
open(FILE_LCK, "+>$conf_lck_file") or die "Can't open wlb lock file";
write_health();
write_rules();
close FILE;
close FILE_LCK;
copy ($conf_lck_file,$conf_file);
unlink($conf_lck_file);
#finally kick the process
system "/opt/vyatta/sbin/vyatta-wanloadbalance.init restart $conf_file 2>/dev/null";
exit 0;
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