diff options
Diffstat (limited to 'scripts/ntptrace.in')
| -rwxr-xr-x | scripts/ntptrace.in | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/scripts/ntptrace.in b/scripts/ntptrace.in new file mode 100755 index 0000000..8545b2c --- /dev/null +++ b/scripts/ntptrace.in @@ -0,0 +1,60 @@ +#! @PATH_PERL@ -w + +# 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; +} + |
