Thank you to Myke Place for check_traceroute-pure_perl.pl

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1125 f882894a-f735-0410-b71e-b25c423dba1c

diff --git a/contrib/check_traceroute-pure_perl.pl b/contrib/check_traceroute-pure_perl.pl
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+++ b/contrib/check_traceroute-pure_perl.pl
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+#!/usr/bin/perl -Wall
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+#
+# check_traceroute is designed to generate and alarm if a traceroute exceeds
+# a certain number of hops. This is useful in cases where a multi-homed 
+# network looses a connection and can still ping the remote end because
+# traffic is being re-routed out through the redundent connection.
+#
+# check_traceroute v0.1
+# By mp@xmission.com
+#
+# Thanks to Sebastian Hetze, Linux Information Systems AG who wrote the
+# excellent check_apache plugin, which this plugin was modeled after.
+#
+#############################################################################
+
+use strict;
+use Net::Traceroute;
+use Getopt::Long;
+
+my $version = "v0.1";
+my $opt_v;
+my $opt_t=undef; #for usage () unless ($opt_t) to work right
+my $opt_help;
+my $opt_w;
+my $opt_c;
+
+my %ERRORS = ('UNKNOWN' , '-1',
+              'OK' , '0',
+              'WARNING', '1',
+              'CRITICAL', '2');
+# Set this to whatever you like, but make sure you don't hang Nagios
+# for too long.
+my $timeout = "30";
+
+GetOptions 
+       ("v"   => \$opt_v, "t=s"        => \$opt_t, 
+       "help"  => \$opt_help, "h"      => \$opt_help,
+       "w=i"   => \$opt_w, "c=i"       => \$opt_c
+       );
+
+if ($opt_v) {
+       print "\nThis is check_traceroute version $version\n";
+       print "\n";
+       print "Please report errors to mp\@xmission\.com";
+       print "\n\n";
+       }
+
+#subs  
+sub print_help () {
+       print "\n\nThis is check_traceroute.pl. It is designed to send an alert\n";
+       print "to Nagios if a route to a particular destination exceeds a\n";
+       print "certain number of hops.\n\n";
+       print "Usage:\n";
+       print "\n";
+       print "--help Display this help.\n";
+       print "-v Display the version number of check_traceroute.\n";
+       print "-t Host that you wish to traceroute to.\n";
+       print "-w Number of hops before Nagios generates a WARNING.\n";
+       print "-c Number of hops before Nagios generates a CRITICAL.\n";
+       }
+
+sub usage() {
+       print "check_traceroute -t <host> [-w <warning>] [-c <critical>]\n";
+       }
+
+sub do_check() {
+       if ($opt_t) {
+               unless ($opt_w && $opt_c) {die "You must specify thresholds using -c and -w\n";}
+               my $tr = Net::Traceroute->new(host=>"$opt_t") || die "Can't init traceroute!\n";
+               if($tr->found) {
+                       my $hops = $tr->hops;
+                       if($hops > $opt_w) {
+                               print "Warning: $opt_t is $hops hops away!\n";
+                               exit $ERRORS{'WARNING'};
+                       }
+                       elsif($hops > $opt_c) {
+                               print "Critical: $opt_t is $hops hops away!\n";
+                               exit $ERRORS{'CRITICAL'};
+                       }
+                       else {
+                               print "OK: $opt_t is $hops hops away\n";
+                               exit $ERRORS{'OK'};
+                               }
+               }               
+               else {
+                       print "Couldn't locate host $opt_t!\n";
+                       exit $ERRORS{'UNKNOWN'};
+               }
+       }
+       }
+
+# Must be placed at the end for -Wall to compile cleanly, blech
+if ($opt_help) {
+       print_help();
+       }
+usage() unless ($opt_t);
+#timeoutes
+$SIG{'ALRM'} = sub {
+     print ("ERROR: No response from $opt_t (timeout) in $timeout seconds\n");
+          exit $ERRORS{"UNKNOWN"};
+         };
+         alarm($timeout);
+do_check();
+