142 lines
3.5 KiB
Plaintext
142 lines
3.5 KiB
Plaintext
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#! /usr/bin/perl -w
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# John Hay -- John.Hay@icomtek.csir.co.za / jhay@FreeBSD.org
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package ntptrace;
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use 5.006_000;
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use strict;
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use lib "/usr/share/ntp/lib";
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use NTP::Util qw(ntp_read_vars do_dns);
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exit run(@ARGV) unless caller;
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sub run {
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my $opts;
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if (!processOptions(\@_, $opts)) {
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usage(1);
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};
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my $dodns = $opts->{numeric} ? 0 : 1;
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my $max_hosts = $opts->{'max-hosts'};
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my $host = shift || $opts->{host};
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my $nb_host = 0;
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for (;;) {
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$nb_host++;
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my %info = get_info($host);
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last if not %info;
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my $dhost = $host;
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if ($dodns) {
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my $name = do_dns($host);
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$dhost = $name if defined $name;
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}
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printf "%s: stratum %d, offset %f, synch distance %f",
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$dhost, $info{stratum}, $info{offset}, $info{syncdistance};
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printf ", refid '%s'", $info{refid} if $info{stratum} == 1;
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print "\n";
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last if $info{stratum} == 0 || $info{stratum} == 1 ||
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$info{stratum} == 16;
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last if $info{refid} =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
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last if $nb_host == $max_hosts;
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my $next_host = get_next_host($info{peer}, $host);
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last if $next_host eq '';
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last if $next_host =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
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$host = $next_host;
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}
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return 0;
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}
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sub get_info {
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my ($host) = @_;
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my ($rootdelay, $rootdisp, $info) = (0, 0);
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$info = ntp_read_vars(0, [], $host);
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return if not defined $info;
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return if not exists $info->{stratum};
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$info->{offset} /= 1000;
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$info->{syncdistance} = ($info->{rootdisp} + ($info->{rootdelay} / 2)) / 1000;
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return %$info;
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}
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sub get_next_host {
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my ($peer, $host) = @_;
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my $info = ntp_read_vars($peer, [qw(srcadr)], $host);
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return if not defined $info;
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return $info->{srcadr};
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}
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# EDIT THIS FILE WITH CAUTION (ntptrace-opts)
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#
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# It has been AutoGen-ed August 14, 2018 at 08:09:20 AM by AutoGen 5.18.5
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# From the definitions ntptrace-opts.def
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# and the template file perlopt
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use Getopt::Long qw(GetOptionsFromArray);
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Getopt::Long::Configure(qw(no_auto_abbrev no_ignore_case_always));
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my $usage;
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sub usage {
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my ($ret) = @_;
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print STDERR $usage;
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exit $ret;
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}
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sub paged_usage {
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my ($ret) = @_;
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my $pager = $ENV{PAGER} || '(less || more)';
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open STDOUT, "| $pager" or die "Can't fork a pager: $!";
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print $usage;
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exit $ret;
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}
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sub processOptions {
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my $args = shift;
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my $opts = {
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'numeric' => '',
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'max-hosts' => '99',
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'host' => '127.0.0.1',
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'help' => '', 'more-help' => ''
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};
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my $argument = '[host]';
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my $ret = GetOptionsFromArray($args, $opts, (
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'numeric|n', 'max-hosts|m=i', 'host|r=s',
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'help|?', 'more-help'));
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$usage = <<'USAGE';
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ntptrace - Trace peers of an NTP server - Ver. 4.2.8p12
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USAGE: ntptrace [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [host]
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-n, --numeric Print IP addresses instead of hostnames
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-m, --max-hosts=num Maximum number of peers to trace
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-r, --host=str Single remote host
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-?, --help Display usage information and exit
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--more-help Pass the extended usage text through a pager
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Options are specified by doubled hyphens and their name or by a single
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hyphen and the flag character.
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USAGE
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usage(0) if $opts->{'help'};
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paged_usage(0) if $opts->{'more-help'};
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$_[0] = $opts;
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return $ret;
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}
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END { close STDOUT };
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1;
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__END__
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