302 lines
7.6 KiB
Perl
Executable File
302 lines
7.6 KiB
Perl
Executable File
#!/usr/local/bin/perl -w
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#
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# $Id: ntpsweep,v 1.3 2000/01/15 07:37:52 stenn Exp $
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#
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# DISCLAIMER
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#
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# Copyright (C) 1999,2000 Hans Lambermont and Origin B.V.
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#
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# Permission to use, copy, modify and distribute this software and its
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# documentation for any purpose and without fee is hereby granted,
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# provided that the above copyright notice appears in all copies and
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# that both the copyright notice and this permission notice appear in
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# supporting documentation. This software is supported as is and without
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# any express or implied warranties, including, without limitation, the
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# implied warranties of merchantability and fitness for a particular
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# purpose. The name Origin B.V. must not be used to endorse or promote
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# products derived from this software without prior written permission.
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#
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# Hans Lambermont <Hans.Lambermont@nl.origin-it.com>/<H.Lambermont@chello.nl>
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# 14 Jan 2000
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require 5.0; # But actually tested on 5.004 ;)
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use Getopt::Long; # GetOptions()
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use strict;
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my $version = 1.3;
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(my $program = $0) =~ s%.*/(.+?)(.pl)?$%$1%;
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# Hardcoded paths/program names
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my $ntpdate = "ntpdate";
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my $ntpq = "ntpq";
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# no STDOUT buffering
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$| = 1;
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my ($help, $single_host, $showpeers, $maxlevel, $strip, $askversion);
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my $res = GetOptions("help!" => \$help,
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"host=s" => \$single_host,
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"peers!" => \$showpeers,
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"maxlevel=s" => \$maxlevel,
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"strip=s" => \$strip,
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"version!" => \$askversion);
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if ($askversion) {
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print("$version\n");
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exit 0;
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}
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if ($help || ((@ARGV != 1) && !$single_host)) {
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warn <<EOF;
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This is $program, version $version
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Copyright (C) 1999,2000 Hans Lambermont and Origin B.V. Disclaimer inside.
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Usage:
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$program [--help|--peers|--strip <string>|--maxlevel <level>|--version] \\
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<file>|[--host <hostname>]
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Description:
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$program prints per host given in <file> the NTP stratum level, the
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clock offset in seconds, the daemon version, the operating system and
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the processor. Optionally recursing through all peers.
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Options:
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--help
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Print this short help text and exit.
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--version
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Print version ($version) and exit.
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<file>
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Specify hosts file. File format is one hostname or ip number per line.
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Lines beginning with # are considered as comment.
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--host <hostname>
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Speficy a single host, bypassing the need for a hosts file.
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--peers
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Recursively list all peers a host synchronizes to.
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An '= ' before a peer means a loop. Recursion stops here.
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--maxlevel <level>
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Traverse peers up to this level (4 is a reasonable number).
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--strip <string>
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Strip <string> from hostnames.
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Examples:
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$program myhosts.txt --strip .foo.com
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$program --host some.host --peers --maxlevel 4
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EOF
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exit 1;
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}
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my $hostsfile = shift;
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my (@hosts, @known_hosts);
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my (%known_host_info, %known_host_peers);
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sub read_hosts()
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{
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local *HOSTS;
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open (HOSTS, $hostsfile) ||
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die "$program: FATAL: unable to read $hostsfile: $!\n";
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while (<HOSTS>) {
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next if /^\s*(#|$)/; # comment/empty
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chomp;
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push(@hosts, $_);
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}
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close(HOSTS);
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}
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# translate IP to hostname if possible
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sub ip2name {
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my($ip) = @_;
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my($addr, $name, $aliases, $addrtype, $length, @addrs);
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$addr = pack('C4', split(/\./, $ip));
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($name, $aliases, $addrtype, $length, @addrs) = gethostbyaddr($addr, 2);
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if ($name) {
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# return lower case name
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return("\L$name");
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} else {
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return($ip);
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}
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}
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# item_in_list($item, @list): returns 1 if $item is in @list, 0 if not
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sub item_in_list {
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my($item, @list) = @_;
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my($i);
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foreach $i (@list) {
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return 1 if ($item eq $i);
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}
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return 0;
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}
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sub scan_host($;$;$) {
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my($host, $level, @trace) = @_;
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my $stratum = 0;
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my $offset = 0;
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my $daemonversion = "";
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my $system = "";
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my $processor = "";
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my @peers;
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my $known_host = 0;
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if (&item_in_list($host, @known_hosts)) {
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$known_host = 1;
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} else {
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# ntpdate part
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open(NTPDATE, "$ntpdate -bd $host 2>/dev/null |") ||
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die "Cannot open ntpdate pipe: $!\n";
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while (<NTPDATE>) {
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/^stratum\s+(\d+).*$/ && do {
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$stratum = $1;
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};
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/^offset\s+([0-9.-]+)$/ && do {
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$offset = $1;
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};
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}
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close(NTPDATE);
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# got answers ? If so, go on.
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if ($stratum) {
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# ntpq part
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my $ntpqparams = "-c 'rv 0 processor,system,daemon_version'";
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open(NTPQ, "$ntpq $ntpqparams $host 2>/dev/null |") ||
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die "Cannot open ntpq pipe: $!\n";
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while (<NTPQ>) {
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/daemon_version="(.*)"/ && do {
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$daemonversion = $1;
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};
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/system="([^"]*)"/ && do {
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$system = $1;
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};
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/processor="([^"]*)"/ && do {
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$processor = $1;
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};
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}
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close(NTPQ);
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# Shorten daemon_version string.
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$daemonversion =~ s/(;|Mon|Tue|Wed|Thu|Fri|Sat|Sun).*$//;
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$daemonversion =~ s/version=//;
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$daemonversion =~ s/(x|)ntpd //;
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$daemonversion =~ s/(\(|\))//g;
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$daemonversion =~ s/beta/b/;
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$daemonversion =~ s/multicast/mc/;
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# Shorten system string
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$system =~ s/UNIX\///;
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$system =~ s/RELEASE/r/;
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$system =~ s/CURRENT/c/;
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# Shorten processor string
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$processor =~ s/unknown//;
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}
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# got answers ? If so, go on.
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if ($daemonversion) {
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# ntpq again, find out the peers this time
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if ($showpeers) {
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my $ntpqparams = "-pn";
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open(NTPQ, "$ntpq $ntpqparams $host 2>/dev/null |") ||
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die "Cannot open ntpq pipe: $!\n";
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while (<NTPQ>) {
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/^No association ID's returned$/ && do {
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last;
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};
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/^ remote/ && do {
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next;
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};
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/^==/ && do {
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next;
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};
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/^( |x|\.|-|\+|#|\*|o)([^ ]+)/ && do {
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push(@peers, ip2name($2));
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next;
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};
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print "ERROR: $_";
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}
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close(NTPQ);
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}
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}
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# Add scanned host to known_hosts array
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push(@known_hosts, $host);
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if ($stratum) {
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$known_host_info{$host} = sprintf("%2d %9.3f %-11s %-12s %s",
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$stratum, $offset, substr($daemonversion,0,11),
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substr($system,0,12), substr($processor,0,9));
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} else {
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# Stratum level 0 is consider invalid
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$known_host_info{$host} = sprintf(" ?");
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}
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$known_host_peers{$host} = [@peers];
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}
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if ($stratum || $known_host) { # Valid or known host
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my $printhost = ' ' x $level . $host;
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# Shorten host string
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if ($strip) {
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$printhost =~ s/$strip//;
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}
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# append number of peers in brackets if requested and valid
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if ($showpeers && ($known_host_info{$host} ne " ?")) {
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$printhost .= " (" . @{$known_host_peers{$host}} . ")";
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}
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# Finally print complete host line
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printf("%-32s %s\n",
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substr($printhost,0,32), $known_host_info{$host});
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if ($showpeers && (eval($maxlevel ? $level < $maxlevel : 1))) {
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my $peer;
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push(@trace, $host);
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# Loop through peers
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foreach $peer (@{$known_host_peers{$host}}) {
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if (&item_in_list($peer, @trace)) {
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# we've detected a loop !
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$printhost = ' ' x ($level + 1) . "= " . $peer;
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# Shorten host string
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if ($strip) {
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$printhost =~ s/$strip//;
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}
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printf("%-32s %s\n",
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substr($printhost,0,32));
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} else {
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if (substr($peer,0,3) ne "127") {
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&scan_host($peer, $level + 1, @trace);
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}
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}
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}
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}
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} else { # We did not get answers from this host
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my $printhost = ' ' x $level . $host;
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# Shorten host string
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if ($strip) {
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$printhost =~ s/$strip//;
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}
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printf("%-32s ?\n", substr($printhost,0,32));
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}
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}
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sub scan_hosts()
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{
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my $host;
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for $host (@hosts) {
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my @trace;
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push(@trace, $host);
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scan_host($host, 0, @trace);
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}
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}
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# Main program
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if ($single_host) {
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push(@hosts, $single_host);
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} else {
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&read_hosts($hostsfile);
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}
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# Print header
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print <<EOF;
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Host st offset(s) version system processor
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--------------------------------+--+---------+-----------+------------+---------
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EOF
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&scan_hosts();
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exit 0;
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