81 lines
1.8 KiB
Plaintext
Executable File
81 lines
1.8 KiB
Plaintext
Executable File
#! @PATH_PERL@ -w
|
|
# John Hay -- John.Hay@icomtek.csir.co.za / jhay@FreeBSD.org
|
|
|
|
package ntptrace;
|
|
use 5.006_000;
|
|
use strict;
|
|
use lib "@PERLLIBDIR@";
|
|
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};
|
|
}
|
|
|
|
@ntptrace_opts@
|
|
|
|
1;
|
|
__END__
|