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#!/usr/bin/perl
#
# Module: vyatta-op-dns-forwarding.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.
#
# 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: August 2008
# Description: Script to execute op-mode commands for DNS forwarding
#
# **** End License ****
#
use lib "/opt/vyatta/share/perl5/";
use Getopt::Long;
use VyattaConfig;
use strict;
use warnings;
my $show_stats_output="";
my $show_nameservers_output="";
my $dnsmasq_log='/var/log/dnsmasq.log';
sub get_cache_stats {
my ($cache_size, $queries_forwarded, $queries_answered_locally, $entries_inserted, $entries_removed);
my $grepped_line = `grep 'cache size' $dnsmasq_log`;
my @split_line = split(/\s+/, $grepped_line);
my @temp_split = split(/,/, $split_line[6]);
$cache_size = $temp_split[0];
@temp_split = split(/\//, $split_line[7]);
$entries_removed = $temp_split[0];
$entries_inserted = $temp_split[1];
$grepped_line = `grep 'queries forwarded' $dnsmasq_log`;
@split_line = split(/\s+/, $grepped_line);
@temp_split = split(/,/, $split_line[6]);
$queries_forwarded = $temp_split[0];
$queries_answered_locally = $split_line[10];
$show_stats_output .= "----------------\n";
$show_stats_output .= "Cache statistics\n";
$show_stats_output .= "----------------\n";
$show_stats_output .= "Cache size: $cache_size\n";
$show_stats_output .= "Queries forwarded: $queries_forwarded\n";
$show_stats_output .= "Queries answered locally: $queries_answered_locally\n";
$show_stats_output .= "Total DNS entries inserted into cache: $entries_inserted\n";
$show_stats_output .= "DNS entries removed from cache before expiry: $entries_removed\n";
}
sub get_nameserver_stats {
$show_stats_output .= "\n---------------------\n";
$show_stats_output .= "Nameserver statistics\n";
$show_stats_output .= "---------------------\n";
my @grepped_lines = `grep 'server' $dnsmasq_log`;
foreach my $lines (@grepped_lines) {
my @each_line = split(/\s+/, $lines);
my $nameserver_word = $each_line[5];
my @nameserver_split = split(/#/, $nameserver_word);
my $nameserver = $nameserver_split[0];
my $queries_sent_word = $each_line[8];
my @queries_sent_split = split(/,/, $queries_sent_word);
my $queries_sent = $queries_sent_split[0];
my $queries_retried_failed = $each_line[12];
$show_stats_output .= "Server: $nameserver\nQueries sent: $queries_sent\nQueries retried or failed: $queries_retried_failed\n\n";
}
}
sub print_stats {
print $show_stats_output;
}
#
# main
#
my ($clear_cache, $show_statistics, $show_nameservers);
GetOptions("clear-cache!" => \$clear_cache,
"show-statistics!" => \$show_statistics,
"show-nameservers!" => \$show_nameservers);
if (defined $clear_cache) {
system("kill -1 `pidof dnsmasq`");
}
if (defined $show_statistics) {
system("echo > /var/log/dnsmasq.log; kill -10 `pidof dnsmasq`");
get_cache_stats;
get_nameserver_stats;
print_stats;
}
if (defined $show_nameservers) {
}
exit 0;
# end of file
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