63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
|
#! /usr/local/bin/perl -w
|
||
|
|
#
|
||
|
|
# $FreeBSD$
|
||
|
|
|
||
|
|
# John Hay -- John.Hay@icomtek.csir.co.za / jhay@FreeBSD.org
|
||
|
|
|
||
|
|
use Socket;
|
||
|
|
use Getopt::Std;
|
||
|
|
use vars qw($opt_n);
|
||
|
|
|
||
|
|
$ntpq = "ntpq";
|
||
|
|
|
||
|
|
getopts('n');
|
||
|
|
|
||
|
|
$dodns = 1;
|
||
|
|
$dodns = 0 if (defined($opt_n));
|
||
|
|
|
||
|
|
$host = shift;
|
||
|
|
$host ||= "127.0.0.1";
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
$stratum = 255;
|
||
|
|
$cmd = "$ntpq -n -c rv $host";
|
||
|
|
open(PH, $cmd . "|") || die "failed to start command $cmd: $!";
|
||
|
|
while (<PH>) {
|
||
|
|
$stratum = $1 if (/stratum=(\d+)/);
|
||
|
|
$peer = $1 if (/peer=(\d+)/);
|
||
|
|
# Very old servers report phase and not offset.
|
||
|
|
$offset = $1 if (/(?:offset|phase)=([^\s,]+)/);
|
||
|
|
$rootdelay = $1 if (/rootdelay=([^\s,]+)/);
|
||
|
|
$refid = $1 if (/refid=([^\s,]+)/);
|
||
|
|
}
|
||
|
|
close(PH) || die "$cmd failed";
|
||
|
|
last if ($stratum == 255);
|
||
|
|
$offset /= 1000;
|
||
|
|
$rootdelay /= 1000;
|
||
|
|
$dhost = $host;
|
||
|
|
# Only do lookups of IPv4 addresses. The standard lookup functions
|
||
|
|
# of perl only do IPv4 and I don't know if we should require extras.
|
||
|
|
if ($dodns && $host =~ /^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/) {
|
||
|
|
$iaddr = inet_aton($host);
|
||
|
|
$name = (gethostbyaddr($iaddr, AF_INET))[0];
|
||
|
|
$dhost = $name if (defined($name));
|
||
|
|
}
|
||
|
|
printf("%s: stratum %d, offset %f, root distance %f",
|
||
|
|
$dhost, $stratum, $offset, $rootdelay);
|
||
|
|
printf(", refid '%s'", $refid) if ($stratum == 1);
|
||
|
|
printf("\n");
|
||
|
|
last if ($stratum == 0 || $stratum == 1 || $stratum == 16);
|
||
|
|
last if ($refid =~ /^127\.127\.\d{1,3}\.\d{1,3}$/);
|
||
|
|
|
||
|
|
$cmd = "$ntpq -n -c \"pstat $peer\" $host";
|
||
|
|
open(PH, $cmd . "|") || die "failed to start command $cmd: $!";
|
||
|
|
$thost = "";
|
||
|
|
while (<PH>) {
|
||
|
|
$thost = $1, last if (/srcadr=(\S+),/);
|
||
|
|
}
|
||
|
|
close(PH) || die "$cmd failed";
|
||
|
|
last if ($thost eq "");
|
||
|
|
$host = $thost;
|
||
|
|
}
|
||
|
|
|