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|
#!/usr/bin/perl
# nagios: -epn
# $Id: check_whois,v 1.24 2018/05/01 17:31:04 wessels Exp $
#
# check_whois
#
# nagios plugin to check the expiration date of a domain.
# Copyright (c) 2008, The Measurement Factory, Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# Neither the name of The Measurement Factory nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# usage
#
# define command {
# command_name check-whois
# command_line /usr/local/libexec/nagios-local/check_whois $HOSTADDRESS$
# }
#
# define service {
# name whois-service
# check_command check-whois
# ...
# }
#
# define host {
# use dns-zone
# host_name zone.example.com
# alias ZONE example.com
# }
#
# define service {
# use whois-service
# host_name zone.example.com
# }
# AUTHORS and CONTRIBUTORS:
# Duane Wessels
# Matt Christian
# John Lines
use strict;
use warnings;
use Getopt::Std;
use Date::Manip;
use POSIX qw(strftime);
use Env '@PATH';
my %opts;
getopts('xds:', \%opts);
my $string_found = 0;
my $name = shift or die usage();
$name =~ s/^zone\.//;
my $whoiscmd = findwhois();
print STDERR "$0 version ". '$Id: check_whois,v 1.24 2018/05/01 17:31:04 wessels Exp $'. "\n" if $opts{d};
print STDERR "Whois command = $whoiscmd\n" if $opts{d};
grok($whoiscmd, $name);
exit 0;
sub findwhois {
# List of whois commands to find (in order)
my @whoiscmds = qw( jwhois whois );
foreach my $wc (@whoiscmds) {
if (grep { -x "$_/$wc" } @PATH) {
$wc .= ' -n ' if ($wc eq 'jwhois');
return $wc;
}
}
die "Could not find a whois command!\n";
}
#
# the ~ 2013-14-15 era New GTLDs have whois servers at whois.nic.$tld
# and they are slow to be configured in either whois clients or the
# whois-servers.net zone.
#
sub findnewgtldwhois($) {
my $name = shift;
my @x = split /\./, $name;
my $tld = pop @x;
my $whois = "whois.nic.$tld";
return gethostbyname($whois) ? $whois : undef;
}
sub not_in_whois($) {
my $line = shift;
return 1 if $line =~ /^no match for/;
return 1 if $line =~ /^not found/;
return 0;
}
sub grok {
my $whoiscmd = shift || die;
my $name = shift || die;
my $arg = $name;
if ($name =~ /\.name$/) {
# In order to get useful information out of
# the .NAME whois server, the query must
# be reformatted
$arg = "'domain = $name'";
}
open (CMD, "$whoiscmd $arg|") || die;
my $registrar = undef;
my $whoisservice = undef;
my $expires = undef;
my $status = '';
my $state = 0;
my $lineno = 0;
print STDERR "checking $name\n" if $opts{d};
while (<CMD>) {
$lineno++;
tr/A-Z/a-z/;
print STDERR "# $_" if $opts{d};
if ($lineno == 1 && not_in_whois($_)) {
critical("$name not found in whois");
}
$registrar = $1 if (/registrar:\s*(\S.*)/);
if (!defined($registrar)) {
$registrar = $1 if (/registrar id:\s*(\S.*)/);
$registrar = $1 if (/registrar handle\.*:\s*(\S.*)/);
$registrar = $1 if (/\s+(.*)\s*\[tag\s*=.*\]/);
#
# CIRA whois output
if ($name =~ /\.ca$/ && /^registrar:/) {
$_ = <CMD>;
tr/A-Z/a-z/;
$registrar = $1 if (/name:\s+(.*)/);
}
}
if (!defined($whoisservice)) {
$whoisservice = $1 if (/the\s+(\w+)\s+whois\s+database/);
$whoisservice = $1 if (/^\s+(\w+)\s+whois\s+service/);
$whoisservice = $1 if (/record\s+maintained\s+by:\s+(\S.*)/);
}
if (/expiration date:\s*(\d\d-\w\w\w-\d\d\d\d)/) {
$expires = $1;
} elsif (/(record )?(will )?expires? on[ :](\S.*\S)\.?$/) {
$expires = $3;
} elsif (/expires:\s+([-\w\s]+)/) {
$expires = $1;
} elsif (/(domain )?expiration date:\s+(\S.*\S)/) {
$expires = $2;
} elsif ($name =~ /\.gov\.uk$/ && /renewal date:/) {
chomp($_ = <CMD>);
tr/A-Z/a-z/;
$expires = $_;
} elsif (/(expiry|renewal) date:\s+(\S.*\S)/) {
$expires = $2;
}
if (defined $opts{s}) {
$string_found = 1 if (/$opts{s}/i);
}
}
close(CMD);
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
# Remove any leading/trailing whitespace
#
$expires =~ s/^\s+// if defined $expires;
$expires =~ s/\s+$// if defined $expires;
# Remove any trailing dot from the expire time
#
$expires =~ s/\.$// if defined $expires;
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
if (defined $registrar) {
$registrar = 'gandi' if ($registrar eq 'r42-lror');
$registrar = 'go daddy' if ($registrar =~ /go daddy/);
$registrar = 'go daddy' if ($registrar eq 'r91-lror');
} elsif (defined $whoisservice) {
$registrar = $whoisservice . ' whois service';
} elsif ((my $newgltdwhois = findnewgtldwhois($name)) && $whoiscmd !~ / -h /) {
print STDERR "retrying with -h $newgltdwhois\n" if $opts{d};
$whoiscmd .= " -h $newgltdwhois";
grok($whoiscmd, $name);
return;
} elsif (defined $opts{x}) {
$registrar = 'UNKNOWN';
} else {
critical("Didn't find Registrar");
}
# Date::Manip doesn't like the DD-MM-YYYY format, so we reformat it
# as YYYY-MM-DD. Also month might not be numeric.
#
if ($expires =~ /-\w+-\d\d\d\d$/) {
my @p = split(/-/, $expires);
if ($p[1] =~ /^[a-zA-Z]+$/ || $p[0] > 12) {
# DD-MM-YYYY
$expires = join('-', $p[2], $p[1], $p[0]);
} elsif ($p[0] =~ /^[a-zA-Z]+$/ || $p[1] > 12) {
# MM-DD-YYYY
$expires = join('-', $p[2], $p[0], $p[1]);
} else {
# Unknown, assume DD-MM-YYYY
$expires = join('-', $p[2], $p[1], $p[0]);
}
}
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
# Network Solutions has a bug in their whois output, returning dates like this:
# Registrar Registration Expiration Date: Fri Jul 21 00:00:00 EDT 2023T00:00:00Z
#
if ($expires =~ /[a-z]{3} ([a-z]{3}) (\d\d) 00:00:00 \S+ (\d\d\d\d)T/i) {
$expires = join('-', $2,$1,$3);
}
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
# Name.com returns dates like this: 2018-12-13T21:27:28-07:00Z
# Just remove the timezone offset and call it good enough
#
if ($expires =~ /(\d{4}-\d\d-\d\dt\d\d:\d\d:\d\d)-\d\d:\d\dz/i) {
$expires = $1;
}
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
my $t;
if (defined $expires) {
$expires =~ s/-t/ /i;
$expires =~ s/z$//i;
printf STDERR "Line %d: expires='%s'\n", __LINE__, $expires if $opts{d};
$t = UnixDate($expires, "%s");
critical("Invalid expiration time '$expires'") unless defined $t;
critical("Invalid expiration time '$expires' (t=$t)") if ($t < 0);
$expires = strftime("%Y-%m-%d", localtime($t));
} elsif (defined $opts{x}) {
$t = time + (86400 * 90);
$expires = 'UNKNOWN';
} else {
critical("Didn't find expiration timestamp");
}
if (defined $opts{s} && 0 == $string_found) {
critical ("String '$opts{s}' not found in whois output");
}
my $tense = $t < time ? 'd' : 's';
critical("Expire$tense $expires at $registrar") if ($t - time < (86400*7));
warning ("Expire$tense $expires at $registrar") if ($t - time < (86400*28));
success ("Expires $expires at $registrar");
}
sub success {
output('OK', shift);
exit(0);
}
sub warning {
output('WARNING', shift);
exit(1);
}
sub critical {
output('CRITICAL', shift);
exit(2);
}
sub output {
my $state = shift;
my $msg = shift;
printf "WHOIS %s: %s\n", $state, $msg;
}
sub usage {
"usage: $0 [-xd] [-s string] domain\n".
"\t-d\tDebugging\n".
"\t-x\tDon't complain if Registrar cannot be determined.\n".
"\t-s str\tRequire that the string 'str' appear in the whois output\n";
}
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