#
# Monitorix - A lightweight system monitoring tool.
#
# Copyright (C) 2005-2022 by Jordi Sanfeliu <jordi@fibranet.cat>
#
# 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.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

package chrony;

use strict;
use warnings;
use Monitorix;
use RRDs;
use Exporter 'import';
our @EXPORT = qw(chrony_init chrony_update chrony_cgi);

sub chrony_init {
	my $myself = (caller(0))[3];
	my ($package, $config, $debug) = @_;
	my $rrd = $config->{base_lib} . $package . ".rrd";
	my $chrony = $config->{chrony};

	my $info;
	my @ds;
	my @rra;
	my @tmp;
	my $n;

	my @average;
	my @min;
	my @max;
	my @last;

	if(-e $rrd) {
		$info = RRDs::info($rrd);
		for my $key (keys %$info) {
			if(index($key, 'ds[') == 0) {
				if(index($key, '.type') != -1) {
					push(@ds, substr($key, 3, index($key, ']') - 3));
				}
			}
			if(index($key, 'rra[') == 0) {
				if(index($key, '.rows') != -1) {
					push(@rra, substr($key, 4, index($key, ']') - 4));
				}
													}
		}
		if(scalar(@ds) / 14 != scalar(my @il = split(',', $chrony->{list}))) {
			logger("$myself: Detected size mismatch between 'list' (" . scalar(my @il = split(',', $chrony->{list})) . ") and $rrd (" . scalar(@ds) / 14 . "). Resizing it accordingly. All historical data will be lost. Backup file created.");
			rename($rrd, "$rrd.bak");
		}
		if(scalar(@rra) < 12 + (4 * $config->{max_historic_years})) {
			logger("$myself: Detected size mismatch between 'max_historic_years' (" . $config->{max_historic_years} . ") and $rrd (" . ((scalar(@rra) -12) / 4) . "). Resizing it accordingly. All historical data will be lost. Backup file created.");
			rename($rrd, "$rrd.bak");
		}
	}

	if(!(-e $rrd)) {
		logger("Creating '$rrd' file.");
		for($n = 1; $n <= $config->{max_historic_years}; $n++) {
			push(@average, "RRA:AVERAGE:0.5:1440:" . (365 * $n));
			push(@min, "RRA:MIN:0.5:1440:" . (365 * $n));
			push(@max, "RRA:MAX:0.5:1440:" . (365 * $n));
			push(@last, "RRA:LAST:0.5:1440:" . (365 * $n));
		}
		for($n = 0; $n < scalar(my @il = split(',', $chrony->{list})); $n++) {
			push(@tmp, "DS:chrony" . $n . "_stratum:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_loffset:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_rmsoffs:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_freq:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_rfreq:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_skew:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_rootdel:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_rootdis:GAUGE:120:U:U");
			push(@tmp, "DS:chrony" . $n . "_upintvl:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_val01:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_val02:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_val03:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_val04:GAUGE:120:0:U");
			push(@tmp, "DS:chrony" . $n . "_val05:GAUGE:120:0:U");
		}
		eval {
			RRDs::create($rrd,
				"--step=60",
				@tmp,
				"RRA:AVERAGE:0.5:1:1440",
				"RRA:AVERAGE:0.5:30:336",
				"RRA:AVERAGE:0.5:60:744",
				@average,
				"RRA:MIN:0.5:1:1440",
				"RRA:MIN:0.5:30:336",
				"RRA:MIN:0.5:60:744",
				@min,
				"RRA:MAX:0.5:1:1440",
				"RRA:MAX:0.5:30:336",
				"RRA:MAX:0.5:60:744",
				@max,
				"RRA:LAST:0.5:1:1440",
				"RRA:LAST:0.5:30:336",
				"RRA:LAST:0.5:60:744",
				@last,
			);
		};
		my $err = RRDs::error;
		if($@ || $err) {
			logger("$@") unless !$@;
			if($err) {
				logger("ERROR: while creating $rrd: $err");
				if($err eq "RRDs::error") {
					logger("... is the RRDtool Perl package installed?");
				}
			}
			return;
		}
	}

	push(@{$config->{func_update}}, $package);
	logger("$myself: Ok") if $debug;
}

sub chrony_update {
	my $myself = (caller(0))[3];
	my ($package, $config, $debug) = @_;
	my $rrd = $config->{base_lib} . $package . ".rrd";
	my $chrony = $config->{chrony};

	my $n;
	my $rrdata = "N";

	my $e = 0;
	foreach(my @cl = split(',', $chrony->{list})) {
		my $stratum = 0;
		my $loffset = 0;
		my $rmsoffs = 0;
		my $freq = 0;
		my $rfreq = 0;
		my $skew = 0;
		my $rootdel = 0;
		my $rootdis = 0;
		my $upintvl = 0;
		my $val01 = 0;
		my $val02 = 0;
		my $val03 = 0;
		my $val04 = 0;
		my $val05 = 0;

		my $data;
		my ($host, $port) = split(':', $cl[$e] || "");
		$port = "" if !$port;
		$port = "-p $port" if $port;
		my $cmd = "chronyc -n -h $host $port tracking";

		if(open(EXEC, "$cmd |")) {
			while(<EXEC>) { $data .= $_; }
			close(EXEC);
		}

		if(!$data) {
			logger("$myself: unable to execute '" . $cmd . "' command or invalid connection.");
			$rrdata .= ":$stratum:$loffset:$rmsoffs:$freq:$rfreq:$skew:$rootdel:$rootdis:$upintvl:0:0:0:0:0";
			next;
		}

		foreach(my @l = split('\n', $data)) {
			if(/^Stratum\s*:\s*(\d+)$/) {
				$stratum = $1;
			}
			if(/^Last offset\s*:\s*(-?\d+\.\d+)\s+/) {
				$loffset = $1;
			}
			if(/^RMS offset\s*:\s*(-?\d+\.\d+)\s+/) {
				$rmsoffs = $1;
			}
			if(/^Frequency\s*:\s*(-?\d+\.\d+)\s+/) {
				$freq = $1;
			}
			if(/^Residual freq\s*:\s*(-?\d+\.\d+)\s+/) {
				$rfreq = $1;
			}
			if(/^Skew\s*:\s*(-?\d+\.\d+)\s+/) {
				$skew = $1;
			}
			if(/^Root delay\s*:\s*(\d+\.\d+)\s+/) {
				$rootdel = $1;
			}
			if(/^Root dispersion\s*:\s*(\d+\.\d+)\s+/) {
				$rootdis = $1;
			}
			if(/^Update interval\s*:\s*(\d+\.\d+)\s+/) {
				$upintvl = $1;
			}
		}
		$rrdata .= ":$stratum:$loffset:$rmsoffs:$freq:$rfreq:$skew:$rootdel:$rootdis:$upintvl:0:0:0:0:0";
		$e++;
	}

	RRDs::update($rrd, $rrdata);
	logger("$myself: $rrdata") if $debug;
	my $err = RRDs::error;
	logger("ERROR: while updating $rrd: $err") if $err;
}

sub chrony_cgi {
	my ($package, $config, $cgi) = @_;
	my @output;

	my $chrony = $config->{chrony};
	my @rigid = split(',', ($chrony->{rigid} || ""));
	my @limit = split(',', ($chrony->{limit} || ""));
	my $tf = $cgi->{tf};
	my $colors = $cgi->{colors};
	my $graph = $cgi->{graph};
	my $silent = $cgi->{silent};
	my $zoom = "--zoom=" . $config->{global_zoom};
	my %rrd = (
		'new' => \&RRDs::graphv,
		'old' => \&RRDs::graph,
	);
	my $version = "new";
	my @full_size_mode;
	my $pic;
	my $picz;
	my $picz_width;
	my $picz_height;

	my $u = "";
	my $width;
	my $height;
	my @extra;
	my @riglim;
	my @IMG;
	my @IMGz;
	my @tmp;
	my @tmpz;
	my @CDEF;
	my $e;
	my $e2;
	my $n;
	my $n2;
	my $str;
	my $err;

	$version = "old" if $RRDs::VERSION < 1.3;
	push(@full_size_mode, "--full-size-mode") if $RRDs::VERSION > 1.3;
	my $rrd = $config->{base_lib} . $package . ".rrd";
	my $title = $config->{graph_title}->{$package};
	my $IMG_DIR = $config->{base_dir} . "/" . $config->{imgs_dir};
	my $imgfmt_uc = uc($config->{image_format});
	my $imgfmt_lc = lc($config->{image_format});
	foreach my $i (split(',', $config->{rrdtool_extra_options} || "")) {
		push(@extra, trim($i)) if trim($i);
	}

	$title = !$silent ? $title : "";


	# text mode
	#
	if(lc($config->{iface_mode}) eq "text") {
		if($title) {
			push(@output, main::graph_header($title, 2));
			push(@output, "    <tr>\n");
			push(@output, "    <td>\n");
		}
		my (undef, undef, undef, $data) = RRDs::fetch("$rrd",
			"--resolution=$tf->{res}",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"AVERAGE");
		$err = RRDs::error;
		push(@output, "ERROR: while fetching $rrd: $err\n") if $err;
		my $line1;
		my $line2;
		push(@output, "    <pre style='font-size: 12px; color: $colors->{fg_color}';>\n");
		push(@output, "    ");
		for($n = 0; $n < scalar(my @pl = split(',', $chrony->{list})); $n++) {
			$line1 .= "    LastOffset  RMS_Offset  Root_Delay  RootDisper  Stra  Frequency    Skew  UpIntvl";
			$line2 .= "------------------------------------------------------------------------------------";
			if($line2) {
				my $i = length($line2);
				push(@output, sprintf(sprintf("%${i}s", sprintf("%s", trim($pl[$n])))));
			}
		}
		push(@output, "\n");
		push(@output, "Time$line1\n");
		push(@output, "----$line2 \n");
		my $line;
		my @row;
		my $time;
		my $n2;
		my $from;
		my $to;
		for($n = 0, $time = $tf->{tb}; $n < ($tf->{tb} * $tf->{ts}); $n++) {
			$line = @$data[$n];
			$time = $time - (1 / $tf->{ts});
			push(@output, sprintf(" %2d$tf->{tc}", $time));
			for($n2 = 0; $n2 < scalar(my @pl = split(',', $chrony->{list})); $n2++) {
				undef(@row);
				$from = $n2 * 14;
				$to = $from + 14;
				my ($stratum, $loffset, $rmsoffs, $freq, $rfreq, $skew, $rootdel, $rootdis, $upintvl) = @$line[$from..$to];
				push(@output, sprintf("   % 9.8f  %9.8f    %8.6f    %8.6f    %2.0f     %6.3f   %5.3f  %7.1f", $loffset || 0, $rmsoffs || 0, $rootdel || 0, $rootdis || 0, $stratum || 0, $freq || 0, $skew || 0, $upintvl || 0));
			}
			push(@output, "\n");
		}
		push(@output, "    </pre>\n");
		if($title) {
			push(@output, "    </td>\n");
			push(@output, "    </tr>\n");
			push(@output, main::graph_footer());
		}
		push(@output, "  <br>\n");
		return @output;
	}


	# graph mode
	#
	if($silent eq "yes" || $silent eq "imagetag") {
		$colors->{fg_color} = "#000000";  # visible color for text mode
		$u = "_";
	}
	if($silent eq "imagetagbig") {
		$colors->{fg_color} = "#000000";  # visible color for text mode
		$u = "";
	}

	for($n = 0; $n < scalar(my @cl = split(',', $chrony->{list})); $n++) {
		for($n2 = 1; $n2 <= 6; $n2++) {
			$str = $u . $package . $n . $n2 . "." . $tf->{when} . ".$imgfmt_lc";
			push(@IMG, $str);
			unlink("$IMG_DIR" . $str);
			if(lc($config->{enable_zoom}) eq "y") {
				$str = $u . $package . $n . $n2 . "z." . $tf->{when} . ".$imgfmt_lc";
				push(@IMGz, $str);
				unlink("$IMG_DIR" . $str);
			}
		}
	}

	$e = $e2 = 0;
	foreach my $url (my @cl = split(',', $chrony->{list})) {

		my $data;
		my ($host, $port) = split(':', $cl[$e] || "");
		$port = "" if !$port;
		$port = "-p $port" if $port;
		my $cmd = "chronyc -n -h $host $port tracking";

		if(open(EXEC, "$cmd |")) {
			while(<EXEC>) { $data .= $_; }
			close(EXEC);
		}

		next if !$data;

		my $freq_status = "";
		my $leap_status = "";
		foreach(my @l = split('\n', $data)) {
			if(/^Frequency\s*:\s*-?\d+\.\d+\s+ppm\s+(.*?)$/) {
				$freq_status = trim($1);
				next;
			}
			if(/^Leap status\s*:\s*(.*?)$/) {
				$leap_status = trim($1);
				next;
			}
		}
		if($RRDs::VERSION > 1.2) {
			$leap_status = "COMMENT: Leap status\\: $leap_status\\c",
		} else {
			$leap_status = "COMMENT: Leap status: $leap_status\\c",
		}

		my $driver = "";
		my $timeleft = "";
		my $temp_scale = "";

		if($e) {
			push(@output, "  <br>\n");
		}
		if($title) {
			push(@output, main::graph_header($title, 2));
		}
		@riglim = @{setup_riglim($rigid[0], $limit[0])};
		if($title) {
			push(@output, "    <tr>\n");
			push(@output, "    <td class='td-valign-top'>\n");
		}
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:loffset#44EEEE:Last offset");
		push(@tmp, "GPRINT:loffset:LAST:Cur\\:% 9.8lf");
		push(@tmp, "GPRINT:loffset:AVERAGE:Avg\\:% 9.8lf");
		push(@tmp, "GPRINT:loffset:MIN:Min\\:% 9.8lf");
		push(@tmp, "GPRINT:loffset:MAX:Max\\:% 9.8lf\\n");
		push(@tmp, "LINE2:rmsoffs#44EE44:RMS offset");
		push(@tmp, "GPRINT:rmsoffs:LAST: Cur\\:% 9.8lf");
		push(@tmp, "GPRINT:rmsoffs:AVERAGE:Avg\\:% 9.8lf");
		push(@tmp, "GPRINT:rmsoffs:MIN:Min\\:% 9.8lf");
		push(@tmp, "GPRINT:rmsoffs:MAX:Max\\:% 9.8lf\\n");
		push(@tmpz, "LINE2:loffset#44EEEE:Last offset");
		push(@tmpz, "LINE2:rmsoffs#44EE44:RMS offset");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}

		($width, $height) = split('x', $config->{graph_size}->{main});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6]",
			"--title=$config->{graphs}->{_chrony1}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=Seconds",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$colors->{graph_colors}},
			"DEF:loffset=$rrd:chrony" . $e . "_loffset:AVERAGE",
			"DEF:rmsoffs=$rrd:chrony" . $e . "_rmsoffs:AVERAGE",
			"CDEF:allvalues=loffset,rmsoffs,+",
			@CDEF,
			"COMMENT: \\n",
			@tmp,
			"COMMENT: \\n",
			$leap_status,
			"COMMENT: \\n");
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6]",
				"--title=$config->{graphs}->{_chrony1}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=Seconds",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$colors->{graph_colors}},
				"DEF:loffset=$rrd:chrony" . $e . "_loffset:AVERAGE",
				"DEF:rmsoffs=$rrd:chrony" . $e . "_rmsoffs:AVERAGE",
				"CDEF:allvalues=loffset,rmsoffs,+",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6]: $err\n") if $err;
		}
		$e2 = $e + 1;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6], IMG => $IMG[$e * 6]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6], IMG => $IMG[$e * 6]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6]) . "\n");
			}
		}

		@riglim = @{setup_riglim($rigid[1], $limit[1])};
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:rootdel#4444EE:Root delay");
		push(@tmp, "GPRINT:rootdel:LAST:     Cur\\: %8.6lf");
		push(@tmp, "GPRINT:rootdel:AVERAGE:  Avg\\: %8.6lf");
		push(@tmp, "GPRINT:rootdel:MIN:  Min\\: %8.6lf");
		push(@tmp, "GPRINT:rootdel:MAX:  Max\\: %8.6lf\\n");
		push(@tmp, "LINE2:rootdis#44EEEE:Root dispersion");
		push(@tmp, "GPRINT:rootdis:LAST:Cur\\: %8.6lf");
		push(@tmp, "GPRINT:rootdis:AVERAGE:  Avg\\: %8.6lf");
		push(@tmp, "GPRINT:rootdis:MIN:  Min\\: %8.6lf");
		push(@tmp, "GPRINT:rootdis:MAX:  Max\\: %8.6lf\\n");
		push(@tmp, "LINE2:rootdel#4444EE");
		push(@tmp, "LINE2:rootdis#44EEEE");
		push(@tmpz, "LINE2:rootdel#4444EE:Root delay");
		push(@tmpz, "LINE2:rootdis#44EEEE:Root dispersion");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}

		($width, $height) = split('x', $config->{graph_size}->{main});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6 + 1]",
			"--title=$config->{graphs}->{_chrony2}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=Seconds",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$colors->{graph_colors}},
			"DEF:rootdel=$rrd:chrony" . $e . "_rootdel:AVERAGE",
			"DEF:rootdis=$rrd:chrony" . $e . "_rootdis:AVERAGE",
			"CDEF:allvalues=rootdel,rootdis,+",
			@CDEF,
			"COMMENT: \\n",
			@tmp,
			"COMMENT: \\n");
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6 + 1]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6 + 1]",
				"--title=$config->{graphs}->{_chrony2}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=Seconds",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$colors->{graph_colors}},
				"DEF:rootdel=$rrd:chrony" . $e . "_rootdel:AVERAGE",
				"DEF:rootdis=$rrd:chrony" . $e . "_rootdis:AVERAGE",
				"CDEF:allvalues=rootdel,rootdis,+",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6 + 1]: $err\n") if $err;
		}
		$e2 = $e + 2;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6 + 1], IMG => $IMG[$e * 6 + 1]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6 + 1], IMG => $IMG[$e * 6 + 1]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6 + 1]) . "\n");
			}
		}

		if($title) {
			push(@output, "    </td>\n");
			push(@output, "    <td class='td-valign-top'>\n");
		}

		@riglim = @{setup_riglim($rigid[2], $limit[2])};
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:stratum#44EEEE:Stratum");
		push(@tmp, "GPRINT:stratum:LAST:              Current\\: %2.0lf\\n");
		push(@tmpz, "LINE2:stratum#44EEEE:Stratum");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}
		($width, $height) = split('x', $config->{graph_size}->{small});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6 + 2]",
			"--title=$config->{graphs}->{_chrony3}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=Level",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$cgi->{version12_small}},
			@{$colors->{graph_colors}},
			"DEF:stratum=$rrd:chrony" . $e . "_stratum:AVERAGE",
			"CDEF:allvalues=stratum",
			@CDEF,
			@tmp);
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6 + 2]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6 + 2]",
				"--title=$config->{graphs}->{_chrony3}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=Level",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$cgi->{version12_small}},
				@{$colors->{graph_colors}},
				"DEF:stratum=$rrd:chrony" . $e . "_stratum:AVERAGE",
				"CDEF:allvalues=stratum",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6 + 2]: $err\n") if $err;
		}
		$e2 = $e + 3;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6 + 2], IMG => $IMG[$e * 6 + 2]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6 + 2], IMG => $IMG[$e * 6 + 2]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6 + 2]) . "\n");
			}
		}

		@riglim = @{setup_riglim($rigid[3], $limit[3])};
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:freq#EE44EE:Frequency");
		push(@tmp, "GPRINT:freq:LAST:            Current\\: %5.3lf\\n");
		push(@tmp, "GPRINT:freq_s:LAST:                        %3.1lf s/day ($freq_status)\\n");
		push(@tmpz, "LINE2:freq#EE44EE:Frequency");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}
		($width, $height) = split('x', $config->{graph_size}->{small});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6 + 3]",
			"--title=$config->{graphs}->{_chrony4}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=PPM",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$cgi->{version12_small}},
			@{$colors->{graph_colors}},
			"DEF:freq=$rrd:chrony" . $e . "_freq:AVERAGE",
			"CDEF:freq_s=freq,86400,*,1000000,/",
			"CDEF:allvalues=freq",
			@CDEF,
			@tmp);
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6 + 3]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6 + 3]",
				"--title=$config->{graphs}->{_chrony4}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=PPM",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$cgi->{version12_small}},
				@{$colors->{graph_colors}},
				"DEF:freq=$rrd:chrony" . $e . "_freq:AVERAGE",
				"CDEF:freq_s=freq,86400,*,1000000,/",
				"CDEF:allvalues=freq",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6 + 3]: $err\n") if $err;
		}
		$e2 = $e + 4;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6 + 3], IMG => $IMG[$e * 6 + 3]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6 + 3], IMG => $IMG[$e * 6 + 3]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6 + 3]) . "\n");
			}
		}

		@riglim = @{setup_riglim($rigid[4], $limit[4])};
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:skew#963C74:Skew");
		push(@tmp, "GPRINT:skew:LAST:                 Current\\: %5.3lf\\n");
		push(@tmpz, "LINE2:skew#963C74:Skew");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}
		($width, $height) = split('x', $config->{graph_size}->{small});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6 + 4]",
			"--title=$config->{graphs}->{_chrony5}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=PPM",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$cgi->{version12_small}},
			@{$colors->{graph_colors}},
			"DEF:skew=$rrd:chrony" . $e . "_skew:AVERAGE",
			"CDEF:allvalues=skew",
			@CDEF,
			@tmp);
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6 + 4]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6 + 4]",
				"--title=$config->{graphs}->{_chrony5}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=PPM",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$cgi->{version12_small}},
				@{$colors->{graph_colors}},
				"DEF:skew=$rrd:chrony" . $e . "_skew:AVERAGE",
				"CDEF:allvalues=skew",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6 + 4]: $err\n") if $err;
		}
		$e2 = $e + 5;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6 + 4], IMG => $IMG[$e * 6 + 4]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6 + 4], IMG => $IMG[$e * 6 + 4]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6 + 4]) . "\n");
			}
		}

		@riglim = @{setup_riglim($rigid[5], $limit[5])};
		undef(@tmp);
		undef(@tmpz);
		undef(@CDEF);
		push(@tmp, "LINE2:upintvl#EEEE44:Update interval");
		push(@tmp, "GPRINT:upintvl:LAST:      Current\\: %6.1lf\\n");
		push(@tmpz, "LINE2:upintvl#EEEE44:Update interval");
		if(lc($config->{show_gaps}) eq "y") {
			push(@tmp, "AREA:wrongdata#$colors->{gap}:");
			push(@tmpz, "AREA:wrongdata#$colors->{gap}:");
			push(@CDEF, "CDEF:wrongdata=allvalues,UN,INF,UNKN,IF");
		}
		($width, $height) = split('x', $config->{graph_size}->{small});
		if($silent =~ /imagetag/) {
			($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
			($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
			@tmp = @tmpz;
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
			push(@tmp, "COMMENT: \\n");
		}
		$pic = $rrd{$version}->("$IMG_DIR" . "$IMG[$e * 6 + 5]",
			"--title=$config->{graphs}->{_chrony6}  ($tf->{nwhen}$tf->{twhen})",
			"--start=-$tf->{nwhen}$tf->{twhen}",
			"--imgformat=$imgfmt_uc",
			"--vertical-label=Seconds",
			"--width=$width",
			"--height=$height",
			@extra,
			@riglim,
			$zoom,
			@{$cgi->{version12}},
			@{$cgi->{version12_small}},
			@{$colors->{graph_colors}},
			"DEF:upintvl=$rrd:chrony" . $e . "_upintvl:AVERAGE",
			"CDEF:allvalues=upintvl",
			@CDEF,
			@tmp);
		$err = RRDs::error;
		push(@output, "ERROR: while graphing $IMG_DIR" . "$IMG[$e * 6 + 5]: $err\n") if $err;
		if(lc($config->{enable_zoom}) eq "y") {
			($width, $height) = split('x', $config->{graph_size}->{zoom});
			$picz = $rrd{$version}->("$IMG_DIR" . "$IMGz[$e * 6 + 5]",
				"--title=$config->{graphs}->{_chrony6}  ($tf->{nwhen}$tf->{twhen})",
				"--start=-$tf->{nwhen}$tf->{twhen}",
				"--imgformat=$imgfmt_uc",
				"--vertical-label=Seconds",
				"--width=$width",
				"--height=$height",
				@full_size_mode,
				@extra,
				@riglim,
				$zoom,
				@{$cgi->{version12}},
				@{$cgi->{version12_small}},
				@{$colors->{graph_colors}},
				"DEF:upintvl=$rrd:chrony" . $e . "_upintvl:AVERAGE",
				"CDEF:allvalues=upintvl",
				@CDEF,
				@tmpz);
			$err = RRDs::error;
			push(@output, "ERROR: while graphing $IMG_DIR" . "$IMGz[$e * 6 + 5]: $err\n") if $err;
		}
		$e2 = $e + 6;
		if($title || ($silent =~ /imagetag/ && $graph =~ /chrony$e2/)) {
			if(lc($config->{enable_zoom}) eq "y") {
				if(lc($config->{disable_javascript_void}) eq "y") {
					push(@output, "      " . picz_a_element(config => $config, IMGz => $IMGz[$e * 6 + 5], IMG => $IMG[$e * 6 + 5]) . "\n");
				} else {
					if($version eq "new") {
						$picz_width = $picz->{image_width} * $config->{global_zoom};
						$picz_height = $picz->{image_height} * $config->{global_zoom};
					} else {
						$picz_width = $width + 115;
						$picz_height = $height + 100;
					}
					push(@output, "      " . picz_js_a_element(width => $picz_width, height => $picz_height, config => $config, IMGz => $IMGz[$e * 6 + 5], IMG => $IMG[$e * 6 + 5]) . "\n");
				}
			} else {
				push(@output, "      " . img_element(config => $config, IMG => $IMG[$e * 6 + 5]) . "\n");
			}
		}

		if($title) {
			push(@output, "    </td>\n");
			push(@output, "    </tr>\n");

			push(@output, "    <tr>\n");
			push(@output, "      <td class='td-title' colspan='2'>\n");
			push(@output, "       <font size='-1'>\n");
			push(@output, "        <b>&nbsp;&nbsp;" . trim($url) . "</b>\n");
			push(@output, "       </font>\n");
			push(@output, "      </td>\n");
			push(@output, "    </tr>\n");
			push(@output, main::graph_footer());
		}
		$e++;
	}
	push(@output, "  <br>\n");
	return @output;
}

1;