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#!/usr/bin/perl -w

###############################################################################

#    Webmin Sysstats Module

#    Copyright (C) 2008 by Eric Gerbier

#    Bug reports to: gerbier@users.sourceforge.net

#    $Id$

#

#    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 2 of the License, or

#    (at your option) any later version.

#

#    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.

#

###############################################################################



use strict;

use warnings;

no warnings 'redefine';



use RRDs;

use English qw(-no_match_vars);

use FindBin;



# to be used alone or from sysstat.pl without warning

# because require verify the path

if ( !exists $ENV{WEBMINSTAT_TEMP} ) {

	use lib "$FindBin::Bin/../..";

	## no critic (RequireBarewordIncludes)

	require 'sysstats-aquisition-lib.pl';

	## use critic;

}



my $module_name;



###############################################################################

# log file format :

# 16-May-2008 08:34:49.381 client 137.129.154.11#32807: query: pop.cnrm.meteo.fr.meteo.fr IN AAAA +

sub parse_dnslog($) {

	my $log = shift @_;



	my %res;



	my $r_tab = read_new_lines( $log, $module_name );

	foreach my $line ( @{$r_tab} ) {

		if ( $line =~ m/client .* query: .* IN (\w+)/ ) {

			my $prot = $1;

			if ( exists $res{$prot} ) {

				$res{$prot}++;

			}

			else {

				$res{$prot} = 1;

			}

		}

	}

	return %res;

}

###############################################################################

my %config;

read_file_cached( 'config', \%config );

$module_name = $config{'name'};

debug( "run $module_name version " . $config{'version'} );

my %codes = action_load( \%config );



my $log = $config{'dnslog'};

if ( !$log ) {

	warning('dns log not configured');

	goto FIN;

}

elsif ( !-r $log ) {

	warning("dns log $log not found");

	goto FIN;

}



my %result = parse_dnslog($log);



my $pre     = $config{'pre'};

my $vol_num = 1;



while ( exists $config{ $pre . $vol_num } ) {

	my @tab = split /,/, $config{ $pre . $vol_num };



	my $real_vol_num = $tab[0];

	my $vol          = $tab[1];

	my $runstop      = $tab[3];



	#debug( "volume = $vol");



	my $total;



	if ( is_param_runstop($runstop) ) {

		if ( exists $result{$vol} ) {

			$total = $result{$vol};

		}

		else {



			# not found

			$total = 0;

		}

		debug("$module_name $vol ($real_vol_num) : total=$total");

		action_param( $vol, $total, \%codes );

	}

	else {

		debug("aquisition for $vol stopped");

		$total = 'U';

	}



	my $rrdbase = $real_vol_num . '.rrd';

	RRDs::update( $rrdbase, "N:$total" );

	my $ERR = RRDs::error();

	warning("ERROR while updating $rrdbase database : $ERR") if $ERR;

	$vol_num++;

}



# a label to quit

#I can not use return when executing this script standalone,

# so I had to use goto

FIN: