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Monitorix/lib/port.pm

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#
# Monitorix - A lightweight system monitoring tool.
#
# Copyright (C) 2005-2014 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 port;
use strict;
use warnings;
use Monitorix;
use RRDs;
use POSIX qw(strftime);
use Exporter 'import';
our @EXPORT = qw(port_init port_update port_cgi);
sub port_init {
my $myself = (caller(0))[3];
my ($package, $config, $debug) = @_;
my $rrd = $config->{base_lib} . $package . ".rrd";
my $port = $config->{port};
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) / 4 != $port->{max}) {
logger("$myself: Detected size mismatch between 'max = $port->{max}' and $rrd (" . scalar(@ds) / 4 . "). Resizing it accordingly. All historical data will be lost. Backup file created.");
rename($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 < $port->{max}; $n++) {
push(@tmp, "DS:port" . $n . "_i_in:GAUGE:120:0:U");
push(@tmp, "DS:port" . $n . "_i_out:GAUGE:120:0:U");
push(@tmp, "DS:port" . $n . "_o_in:GAUGE:120:0:U");
push(@tmp, "DS:port" . $n . "_o_out:GAUGE:120:0:U");
}
eval {
RRDs::create($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;
}
}
if(scalar(my @pls = split(',', $port->{list})) > $port->{max}) {
logger("$myself: WARNING: 'max' option indicates less ports than really defined in 'list'.");
}
if($config->{os} eq "Linux") {
my $num;
my @line;
# set the iptables rules for each defined port
my @pl = split(',', $port->{list});
for($n = 0; $n < min($port->{max}, scalar(@pl)); $n++) {
$pl[$n] = trim($pl[$n]);
my ($np) = ($pl[$n] =~ m/^(\d+).*?/);
if(!$port->{desc}->{$pl[$n]}) {
logger("$myself: port number '$np' listed but not defined.");
next;
}
if($pl[$n] && $np) {
my $p = trim(lc((split(',', $port->{desc}->{$pl[$n]}))[1])) || "all";
my $conn = trim(lc((split(',', $port->{desc}->{$pl[$n]}))[2]));
if($conn eq "in" || $conn eq "in/out") {
system("iptables -N monitorix_IN_$n 2>/dev/null");
system("iptables -I INPUT -p $p --sport 1024:65535 --dport $np -m conntrack --ctstate NEW,ESTABLISHED,RELATED -j monitorix_IN_$n -c 0 0");
system("iptables -I OUTPUT -p $p --sport $np --dport 1024:65535 -m conntrack --ctstate ESTABLISHED,RELATED -j monitorix_IN_$n -c 0 0");
}
if($conn eq "out" || $conn eq "in/out") {
system("iptables -N monitorix_OUT_$n 2>/dev/null");
system("iptables -I INPUT -p $p --sport $np --dport 1024:65535 -m conntrack --ctstate ESTABLISHED,RELATED -j monitorix_OUT_$n -c 0 0");
system("iptables -I OUTPUT -p $p --sport 1024:65535 --dport $np -m conntrack --ctstate NEW,ESTABLISHED,RELATED -j monitorix_OUT_$n -c 0 0");
}
if($conn ne "in" && $conn ne "out" && $conn ne "in/out") {
logger("$myself: Invalid connection type '$conn'; must be 'in', 'out' or 'in/out'.");
}
}
}
}
if(grep {$_ eq $config->{os}} ("FreeBSD", "OpenBSD", "NetBSD")) {
# set the ipfw rules for each defined port
my @pl = split(',', $port->{list});
for($n = 0; $n < min($port->{max}, scalar(@pl)); $n++) {
$pl[$n] = trim($pl[$n]);
my ($np) = ($pl[$n] =~ m/^(\d+).*?/);
if($pl[$n] && $np) {
my $p = lc((split(',', $port->{desc}->{$pl[$n]}))[1]) || "all";
# in/out not supported yet FIXME
system("ipfw -q add $port->{rule} count $p from me $np to any");
system("ipfw -q add $port->{rule} count $p from any to me $np");
}
}
}
$config->{port_hist_in} = ();
$config->{port_hist_out} = ();
push(@{$config->{func_update}}, $package);
logger("$myself: Ok") if $debug;
}
sub port_update {
my $myself = (caller(0))[3];
my ($package, $config, $debug) = @_;
my $rrd = $config->{base_lib} . $package . ".rrd";
my $port = $config->{port};
my @i_in;
my @i_out;
my @o_in;
my @o_out;
my $n;
my $rrdata = "N";
if($config->{os} eq "Linux") {
open(IN, "iptables -nxvL INPUT |");
while(<IN>) {
for($n = 0; $n < $port->{max}; $n++) {
$i_in[$n] = 0 unless $i_in[$n];
$o_in[$n] = 0 unless $o_in[$n];
if(/ monitorix_IN_$n /) {
my (undef, $bytes) = split(' ', $_);
chomp($bytes);
$i_in[$n] = $bytes - ($config->{port_hist_i_in}[$n] || 0);
$i_in[$n] = 0 unless $i_in[$n] != $bytes;
$config->{port_hist_i_in}[$n] = $bytes;
$i_in[$n] /= 60;
}
if(/ monitorix_OUT_$n /) {
my (undef, $bytes) = split(' ', $_);
chomp($bytes);
$o_in[$n] = $bytes - ($config->{port_hist_o_in}[$n] || 0);
$o_in[$n] = 0 unless $o_in[$n] != $bytes;
$config->{port_hist_o_in}[$n] = $bytes;
$o_in[$n] /= 60;
}
}
}
close(IN);
open(IN, "iptables -nxvL OUTPUT |");
while(<IN>) {
for($n = 0; $n < $port->{max}; $n++) {
$o_out[$n] = 0 unless $o_out[$n];
$i_out[$n] = 0 unless $i_out[$n];
if(/ monitorix_OUT_$n /) {
my (undef, $bytes) = split(' ', $_);
chomp($bytes);
$o_out[$n] = $bytes - ($config->{port_hist_o_out}[$n] || 0);
$o_out[$n] = 0 unless $o_out[$n] != $bytes;
$config->{port_hist_o_out}[$n] = $bytes;
$o_out[$n] /= 60;
}
if(/ monitorix_IN_$n /) {
my (undef, $bytes) = split(' ', $_);
chomp($bytes);
$i_out[$n] = $bytes - ($config->{port_hist_i_out}[$n] || 0);
$i_out[$n] = 0 unless $i_out[$n] != $bytes;
$config->{port_hist_i_out}[$n] = $bytes;
$i_out[$n] /= 60;
}
}
}
close(IN);
}
if(grep {$_ eq $config->{os}} ("FreeBSD", "OpenBSD", "NetBSD")) {
my @pl = split(',', $port->{list});
open(IN, "ipfw show $port->{rule} 2>/dev/null |");
while(<IN>) {
for($n = 0; $n < $port->{max}; $n++) {
$i_in[$n] = 0 unless $i_in[$n];
$o_in[$n] = 0 unless $o_in[$n];
$pl[$n] = trim($pl[$n]);
my ($np) = ($pl[$n] =~ m/^(\d+).*?/);
if(/ from any to me dst-port $np$/) {
my (undef, undef, $bytes) = split(' ', $_);
chomp($bytes);
$i_in[$n] = $bytes - ($config->{port_hist_i_in}[$n] || 0);
$i_in[$n] = 0 unless $i_in[$n] != $bytes;
$config->{port_hist_i_in}[$n] = $bytes;
$i_in[$n] /= 60;
}
$o_out[$n] = 0 unless $o_out[$n];
$i_out[$n] = 0 unless $i_out[$n];
if(/ from me $np to any$/) {
my (undef, undef, $bytes) = split(' ', $_);
chomp($bytes);
$i_out[$n] = $bytes - ($config->{port_hist_i_out}[$n] || 0);
$i_out[$n] = 0 unless $i_out[$n] != $bytes;
$config->{port_hist_i_out}[$n] = $bytes;
$i_out[$n] /= 60;
}
}
}
close(IN);
}
for($n = 0; $n < $port->{max}; $n++) {
$rrdata .= ":$i_in[$n]:$i_out[$n]:$o_in[$n]:$o_out[$n]";
}
RRDs::update($rrd, $rrdata);
logger("$myself: $rrdata") if $debug;
my $err = RRDs::error;
logger("ERROR: while updating $rrd: $err") if $err;
}
sub port_cgi {
my ($package, $config, $cgi) = @_;
my $port = $config->{port};
my $tf = $cgi->{tf};
my $colors = $cgi->{colors};
my $graph = $cgi->{graph};
my $silent = $cgi->{silent};
my $zoom = "--zoom=" . $config->{global_zoom};
my $u = "";
my $width;
my $height;
my @riglim;
my @warning;
my @PNG;
my @PNGz;
my $name;
my @tmp;
my @tmpz;
my @CDEF;
my $T = "B";
my $vlabel = "bytes/s";
my $n;
my $n2;
my $n3;
my $str;
my $err;
my $rrd = $config->{base_lib} . $package . ".rrd";
my $title = $config->{graph_title}->{$package};
my $PNG_DIR = $config->{base_dir} . "/" . $config->{imgs_dir};
$title = !$silent ? $title : "";
if(lc($config->{netstats_in_bps}) eq "y") {
$T = "b";
$vlabel = "bits/s";
}
# text mode
#
if(lc($config->{iface_mode}) eq "text") {
if($title) {
main::graph_header($title, 2);
print(" <tr>\n");
print(" <td bgcolor='$colors->{title_bg_color}'>\n");
}
my (undef, undef, undef, $data) = RRDs::fetch("$rrd",
"--start=-$tf->{nwhen}$tf->{twhen}",
"AVERAGE",
"-r $tf->{res}");
$err = RRDs::error;
print("ERROR: while fetching $rrd: $err\n") if $err;
my $line1;
my $line2;
print(" <pre style='font-size: 12px; color: $colors->{fg_color}';>\n");
print(" ");
my $max = min($port->{max}, scalar(my @pl = split(',', $port->{list})));
for($n = 0; $n < $max; $n++) {
$pl[$n] = trim($pl[$n]);
my $pn = trim((split(',', $port->{desc}->{$pl[$n]}))[0]);
my $pc = trim((split(',', $port->{desc}->{$pl[$n]}))[2]);
foreach(split('/', $pc)) {
printf(" %-5s %10s", $pl[$n], uc(trim($_)) . "-" . $pn);
$line1 .= " K$T/s_I K$T/s_O";
$line2 .= "-------------------";
}
}
print("\n");
print("Time$line1\n");
print("----$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 / $tf->{ts});
printf(" %2d$tf->{tc} ", $time);
for($n2 = 0; $n2 < $max; $n2++) {
$pl[$n2] = trim($pl[$n2]);
my $pc = trim((split(',', $port->{desc}->{$pl[$n2]}))[2]);
$from = $n2 * 4;
$to = $from + 3;
my ($i_in, $i_out, $o_in, $o_out) = @$line[$from..$to];
my $k_i_in = ($i_in || 0) / 1024;
my $k_i_out = ($i_out || 0) / 1024;
my $k_o_in = ($o_in || 0) / 1024;
my $k_o_out = ($o_out || 0) / 1024;
if(lc($config->{netstats_in_bps}) eq "y") {
$k_i_in *= 8;
$k_i_out *= 8;
$k_o_in *= 8;
$k_o_out *= 8;
}
foreach(split('/', $pc)) {
if(lc($_) eq "in") {
@row = ($k_i_in, $k_i_out);
printf(" %6d %6d ", @row);
}
if(lc($_) eq "out") {
@row = ($k_o_in, $k_o_out);
printf(" %6d %6d ", @row);
}
}
}
print("\n");
}
print(" </pre>\n");
if($title) {
print(" </td>\n");
print(" </tr>\n");
main::graph_footer();
}
print(" <br>\n");
return;
}
# 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 = "";
}
my $max = min($port->{max}, scalar(my @pl = split(',', $port->{list})));
for($n = 0; $n < $max; $n++) {
$pl[$n] = trim($pl[$n]);
next if !$port->{desc}->{$pl[$n]};
my $pc = trim((split(',', $port->{desc}->{$pl[$n]}))[2]);
foreach my $conn (split('/', $pc)) {
$str = $u . $package . $n . substr($conn, 0 ,1) . "." . $tf->{when} . ".png";
push(@PNG, $str);
unlink("$PNG_DIR" . $str);
if(lc($config->{enable_zoom}) eq "y") {
$str = $u . $package . $n . substr($conn, 0 ,1) . "z." . $tf->{when} . ".png";
push(@PNGz, $str);
unlink("$PNG_DIR" . $str);
}
}
}
$n = $n3 = 0;
$n2 = 1;
while($n < $max) {
next unless $pl[$n];
# continue if port was listed by not defined
if(!$port->{desc}->{$pl[$n]}) {
$n++;
next;
}
if($title) {
if($n == 0) {
main::graph_header($title, $port->{graphs_per_row});
}
if($n2 == 1) {
print(" <tr>\n");
}
}
my $pc = trim((split(',', $port->{desc}->{$pl[$n]}))[2]);
foreach my $pcon (split('/', $pc)) {
if($title) {
print(" <td bgcolor='" . $colors->{title_bg_color} . "'>\n");
}
my $pnum;
$pl[$n] = trim($pl[$n]);
my $pn = trim((split(',', $port->{desc}->{$pl[$n]}))[0]);
my $pp = trim((split(',', $port->{desc}->{$pl[$n]}))[1]);
my $prig = trim((split(',', $port->{desc}->{$pl[$n]}))[3]);
my $plim = trim((split(',', $port->{desc}->{$pl[$n]}))[4]);
undef(@riglim);
if(trim($prig) eq 1) {
push(@riglim, "--upper-limit=" . trim($plim));
} else {
if(trim($prig) eq 2) {
push(@riglim, "--upper-limit=" . trim($plim));
push(@riglim, "--rigid");
}
}
undef(@warning);
if($config->{os} eq "Linux") {
open(IN, "netstat -nl --$pp |");
while(<IN>) {
(undef, undef, undef, $pnum) = split(' ', $_);
chomp($pnum);
$pnum =~ s/.*://;
if($pnum eq $pl[$n]) {
last;
}
}
close(IN);
}
if(grep {$_ eq $config->{os}} ("FreeBSD", "OpenBSD")) {
open(IN, "netstat -anl -p $pp |");
while(<IN>) {
my $stat;
(undef, undef, undef, $pnum, undef, $stat) = split(' ', $_);
chomp($stat);
if($stat eq "LISTEN") {
chomp($pnum);
($pnum) = ($pnum =~ m/^.*?(\.\d+$)/);
$pnum =~ s/\.//;
if($pnum eq $pl[$n]) {
last;
}
}
}
close(IN);
}
if($pnum ne $pl[$n]) {
push(@warning, $colors->{warning_color});
}
$name = substr(uc($pcon) . "-" . $pn, 0, 15);
undef(@tmp);
undef(@tmpz);
undef(@CDEF);
if(lc($pcon) eq "in") {
push(@tmp, "AREA:B_i_in#44EE44:Input");
push(@tmp, "AREA:B_i_out#4444EE:Output");
push(@tmp, "AREA:B_i_out#4444EE:");
push(@tmp, "AREA:B_i_in#44EE44:");
push(@tmp, "LINE1:B_i_out#0000EE");
push(@tmp, "LINE1:B_i_in#00EE00");
push(@tmpz, "AREA:B_i_in#44EE44:Input");
push(@tmpz, "AREA:B_i_out#4444EE:Output");
push(@tmpz, "AREA:B_i_out#4444EE:");
push(@tmpz, "AREA:B_i_in#44EE44:");
push(@tmpz, "LINE1:B_i_out#0000EE");
push(@tmpz, "LINE1:B_i_in#00EE00");
if(lc($config->{netstats_in_bps}) eq "y") {
push(@CDEF, "CDEF:B_i_in=i_in,8,*");
push(@CDEF, "CDEF:B_i_out=i_out,8,*");
} else {
push(@CDEF, "CDEF:B_i_in=i_in");
push(@CDEF, "CDEF:B_i_out=i_out");
}
}
if(lc($pcon) eq "out") {
push(@tmp, "AREA:B_o_in#44EE44:Input");
push(@tmp, "AREA:B_o_out#4444EE:Output");
push(@tmp, "AREA:B_o_out#4444EE:");
push(@tmp, "AREA:B_o_in#44EE44:");
push(@tmp, "LINE1:B_o_out#0000EE");
push(@tmp, "LINE1:B_o_in#00EE00");
push(@tmpz, "AREA:B_o_in#44EE44:Input");
push(@tmpz, "AREA:B_o_out#4444EE:Output");
push(@tmpz, "AREA:B_o_out#4444EE:");
push(@tmpz, "AREA:B_o_in#44EE44:");
push(@tmpz, "LINE1:B_o_out#0000EE");
push(@tmpz, "LINE1:B_o_in#00EE00");
if(lc($config->{netstats_in_bps}) eq "y") {
push(@CDEF, "CDEF:B_o_in=o_in,8,*");
push(@CDEF, "CDEF:B_o_out=o_out,8,*");
} else {
push(@CDEF, "CDEF:B_o_in=o_in");
push(@CDEF, "CDEF:B_o_out=o_out");
}
}
if(lc($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', $config->{graph_size}->{mini});
if($silent =~ /imagetag/) {
($width, $height) = split('x', $config->{graph_size}->{remote}) if $silent eq "imagetag";
($width, $height) = split('x', $config->{graph_size}->{main}) if $silent eq "imagetagbig";
push(@tmp, "COMMENT: \\n");
push(@tmp, "COMMENT: \\n");
push(@tmp, "COMMENT: \\n");
}
RRDs::graph("$PNG_DIR" . "$PNG[$n3]",
"--title=$name traffic ($tf->{nwhen}$tf->{twhen})",
"--start=-$tf->{nwhen}$tf->{twhen}",
"--imgformat=PNG",
"--vertical-label=$vlabel",
"--width=$width",
"--height=$height",
@riglim,
"--lower-limit=0",
$zoom,
@{$cgi->{version12}},
@{$cgi->{version12_small}},
@{$colors->{graph_colors}},
@warning,
"DEF:i_in=$rrd:port" . $n . "_i_in:AVERAGE",
"DEF:i_out=$rrd:port" . $n . "_i_out:AVERAGE",
"DEF:o_in=$rrd:port" . $n . "_o_in:AVERAGE",
"DEF:o_out=$rrd:port" . $n . "_o_out:AVERAGE",
"CDEF:allvalues=i_in,i_out,o_in,o_out,+,+,+",
@CDEF,
@tmp);
$err = RRDs::error;
print("ERROR: while graphing $PNG_DIR" . "$PNG[$n3]: $err\n") if $err;
if(lc($config->{enable_zoom}) eq "y") {
($width, $height) = split('x', $config->{graph_size}->{zoom});
RRDs::graph("$PNG_DIR" . "$PNGz[$n3]",
"--title=$name traffic ($tf->{nwhen}$tf->{twhen})",
"--start=-$tf->{nwhen}$tf->{twhen}",
"--imgformat=PNG",
"--vertical-label=$vlabel",
"--width=$width",
"--height=$height",
@riglim,
"--lower-limit=0",
@{$cgi->{version12}},
@{$cgi->{version12_small}},
@{$colors->{graph_colors}},
@warning,
"DEF:i_in=$rrd:port" . $n . "_i_in:AVERAGE",
"DEF:i_out=$rrd:port" . $n . "_i_out:AVERAGE",
"DEF:o_in=$rrd:port" . $n . "_o_in:AVERAGE",
"DEF:o_out=$rrd:port" . $n . "_o_out:AVERAGE",
"CDEF:allvalues=i_in,i_out,o_in,o_out,+,+,+",
@CDEF,
@tmpz);
$err = RRDs::error;
print("ERROR: while graphing $PNG_DIR" . "$PNGz[$n3]: $err\n") if $err;
}
if($title || ($silent =~ /imagetag/ && $graph =~ /port$n3/)) {
if(lc($config->{enable_zoom}) eq "y") {
if(lc($config->{disable_javascript_void}) eq "y") {
print(" <a href=\"" . $config->{url} . "/" . $config->{imgs_dir} . $PNGz[$n3] . "\"><img src='" . $config->{url} . "/" . $config->{imgs_dir} . $PNG[$n3] . "' border='0'></a>\n");
}
else {
print(" <a href=\"javascript:void(window.open('" . $config->{url} . "/" . $config->{imgs_dir} . $PNGz[$n3] . "','','width=" . ($width + 115) . ",height=" . ($height + 100) . ",scrollbars=0,resizable=0'))\"><img src='" . $config->{url} . "/" . $config->{imgs_dir} . $PNG[$n3] . "' border='0'></a>\n");
}
} else {
print(" <img src='" . $config->{url} . "/" . $config->{imgs_dir} . $PNG[$n3] . "'>\n");
}
}
if($title) {
print(" </td>\n");
}
if($n2 < $port->{graphs_per_row} && $n2 < $max) {
$n2++;
} else {
if($title) {
print(" </tr>\n");
}
$n2 = 1;
}
$n3++;
}
$n++;
}
if($title) {
main::graph_footer();
}
print(" <br>\n");
return;
}
1;
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