| Current File : //usr/bin/ntptrace |
#! /usr/bin/perl -w
# John Hay -- John.Hay@icomtek.csir.co.za / jhay@FreeBSD.org
package ntptrace;
use 5.006_000;
use strict;
use lib "/usr/share/ntp/lib";
use NTP::Util qw(ntp_read_vars do_dns);
exit run(@ARGV) unless caller;
sub run {
my $opts;
if (!processOptions(\@_, $opts)) {
usage(1);
};
my $dodns = $opts->{numeric} ? 0 : 1;
my $max_hosts = $opts->{'max-hosts'};
my $host = shift || $opts->{host};
my $nb_host = 0;
for (;;) {
$nb_host++;
my %info = get_info($host);
last if not %info;
my $dhost = $host;
if ($dodns) {
my $name = do_dns($host);
$dhost = $name if defined $name;
}
printf "%s: stratum %d, offset %f, synch distance %f",
$dhost, $info{stratum}, $info{offset}, $info{syncdistance};
printf ", refid '%s'", $info{refid} if $info{stratum} == 1;
print "\n";
last if $info{stratum} == 0 || $info{stratum} == 1 ||
$info{stratum} == 16;
last if $info{refid} =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
last if $nb_host == $max_hosts;
my $next_host = get_next_host($info{peer}, $host);
last if $next_host eq '';
last if $next_host =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
$host = $next_host;
}
return 0;
}
sub get_info {
my ($host) = @_;
my ($rootdelay, $rootdisp, $info) = (0, 0);
$info = ntp_read_vars(0, [], $host);
return if not defined $info;
return if not exists $info->{stratum};
$info->{offset} /= 1000;
$info->{syncdistance} = ($info->{rootdisp} + ($info->{rootdelay} / 2)) / 1000;
return %$info;
}
sub get_next_host {
my ($peer, $host) = @_;
my $info = ntp_read_vars($peer, [qw(srcadr)], $host);
return if not defined $info;
return $info->{srcadr};
}
# EDIT THIS FILE WITH CAUTION (ntptrace-opts)
#
# It has been AutoGen-ed June 23, 2020 at 02:21:38 AM by AutoGen 5.18.5
# From the definitions ntptrace-opts.def
# and the template file perlopt
use Getopt::Long qw(GetOptionsFromArray);
Getopt::Long::Configure(qw(no_auto_abbrev no_ignore_case_always));
my $usage;
sub usage {
my ($ret) = @_;
print STDERR $usage;
exit $ret;
}
sub paged_usage {
my ($ret) = @_;
my $pager = $ENV{PAGER} || '(less || more)';
open STDOUT, "| $pager" or die "Can't fork a pager: $!";
print $usage;
exit $ret;
}
sub processOptions {
my $args = shift;
my $opts = {
'numeric' => '',
'max-hosts' => '99',
'host' => '127.0.0.1',
'help' => '', 'more-help' => ''
};
my $argument = '[host]';
my $ret = GetOptionsFromArray($args, $opts, (
'numeric|n', 'max-hosts|m=i', 'host|r=s',
'help|?', 'more-help'));
$usage = <<'USAGE';
ntptrace - Trace peers of an NTP server - Ver. 4.2.8p15
USAGE: ntptrace [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [host]
-n, --numeric Print IP addresses instead of hostnames
-m, --max-hosts=num Maximum number of peers to trace
-r, --host=str Single remote host
-?, --help Display usage information and exit
--more-help Pass the extended usage text through a pager
Options are specified by doubled hyphens and their name or by a single
hyphen and the flag character.
USAGE
usage(0) if $opts->{'help'};
paged_usage(0) if $opts->{'more-help'};
$_[0] = $opts;
return $ret;
}
END { close STDOUT };
1;
__END__