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#!/usr/bin/perl
# $Id: check_traceroute.pl 1115 2005-01-27 10:34:16Z stanleyhopcroft $
# Revision 1.1 2005/01/27 10:34:16 stanleyhopcroft
# Jon Meek's check_traceroute for Mon hacked by YT for Nagios. Prob pretty weak
#
use strict ;
use vars qw(%ERRORS $TIMEOUT) ;
use utils qw(%ERRORS $TIMEOUT &print_revision &support &usage) ;
sub print_help ();
sub print_usage ();
$ENV{'PATH'}='/bin:/usr/bin:/usr/sbin';
my $PROGNAME = 'check_traceroute' ;
# delay units are millisecs.
my $MAX_INTERHOP_DELAY = 200 ;
my $MAX_HOPS = 30 ;
use Getopt::Std;
use vars qw($opt_H $opt_N $opt_r $opt_R $opt_T $opt_d $opt_h $opt_i $opt_v $opt_V) ;
getopts('i:H:N:R:T:dhrvV');
# H, N, R, T, and i take parms, others are flags
do { print_help ; exit $ERRORS{OK}; }
if $opt_h ;
do { print_revision($PROGNAME, '$Revision: 1115 $'); exit $ERRORS{OK}; }
if $opt_V ;
do { print_help; exit $ERRORS{OK}; }
unless $opt_R || $opt_r ;
do { print_help; exit $ERRORS{OK}; }
unless $opt_R =~ m|
(?:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}-)+
\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}
|x
|| $opt_r ;
my $should_be = $opt_R ;
# Set default timeout in seconds
my $TimeOut = $opt_T || $TIMEOUT;
my $max_interhop_delay = $opt_i || $MAX_INTERHOP_DELAY ;
my $max_hops = $opt_N || $MAX_HOPS ;
my $TRACEROUTE = '/usr/sbin/traceroute';
my $TargetHost = $opt_H ;
print_help
unless $TargetHost ;
my ($route, $pid, $rta_list) = ( '', '', '' );
my %ResultString = () ;
$SIG{ALRM} = sub { die "timeout" };
eval {
alarm($TimeOut);
# XXXX Discarding STDERR _should_ reduce the risk
# of unexpected output but consequently, results for
# non existent hosts are stupid. However, why would you
# specify a route to a NX host, other than a typo ...
$pid = open(TR, "$TRACEROUTE -n $TargetHost 2>/dev/null |")
or do {
"Failed. Cannot fork \"$TRACEROUTE\": $!" ;
$ERRORS{UNKNOWN} ;
} ;
my $hops = 0 ;
while (<TR>) {
print $_
if $opt_d;
if ( m|#\*\s+\*\s+\*| ) {
# Get * * * then give up
$route .= '*';
# 13 = PIPE, prevents Broken Pipe Error, at least on Solaris
kill 13, $pid;
last;
}
# We will only pick up the first IP address listed on a line for now
# traceroute to csg.citec.com.au (203.9.184.12), 64 hops max, 44 byte packets
# 1 10.254.254.254 0.868 ms 0.728 ms 0.705 ms
# 2 192.168.9.1 1.240 ms 1.165 ms 1.191 ms
my ($ThisHopIP) = m|\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s+|;
my ($max_rta) = m|\d{1,3}\.\d{1,3}\.\d{1,3}\s+ (\d+\.\d+) ms| ;
$route .= $ThisHopIP . '-';
$rta_list .= sprintf("%.1f", $max_rta) . '-' ;
if ( $opt_v ) {
chomp $_ ;
print $_, ' ' x (58 - length), $route, "\n";
}
$hops++ ;
if ( ($hops >= $max_hops) && ! $opt_r ) {
kill 13, $pid ;
print qq(Failed. Max hops ($max_hops) exceeeded: incomplete after $hops hops, "$route".\n) ;
exit $ERRORS{CRITICAL} ;
}
if ( ($hops %2 == 0) && ($hops >= 4) && ! $opt_r ) {
# Check for 2 cycles at end of path ie -(a-b)-(a-b)$
# where a and b are IP v4 addresses of IS (routers).
my ($last_2_is) = $route =~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}-\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})-$/ ;
if ( $route =~ /$last_2_is-$last_2_is-$/ ) {
kill 13, $pid ;
print qq(Failed. Last 2 routers ($last_2_is) repeated, "$route".\n) ;
exit $ERRORS{CRITICAL} ;
}
}
}
};
alarm(0);
if ( $@ and $@ =~ /timeout/ ) {
$route .= '*';
# It was a traceroute timeout
kill 13, $pid;
} elsif ( $@ and $@ !~ /timeout/ ) {
close TR ;
print "Failed. Somethings gone wrong with \"$TRACEROUTE\": $!" ;
exit $ERRORS{UNKNOWN} ;
}
close TR;
# Remove trailing '-'s
# $route =~ s/\-$//;
chop($route) ;
chop($rta_list) ;
print "$route\n"
if $opt_d;
if ( $opt_r ) {
print qq(Ok. Traceroute to host "$TargetHost" via route "$route".\n) ;
exit $ERRORS{OK};
}
if ( &RouteEqual($should_be, $route) ) {
print qq(Ok. Traceroute to "$TargetHost" via expected route "$route" ($rta_list).\n) ;
exit $ERRORS{OK};
} else {
print qq(Failed. Route "$route" ne expected "$should_be".\n) ;
exit $ERRORS{CRITICAL};
}
sub RouteEqual {
my ($current_route, $prev_route) = @_;
return $current_route eq $prev_route ;
}
sub print_usage () {
print "Usage: $PROGNAME [ -R <route_string>|-r ] [ -d -T timeout -v -h -i ] -H <host>\n";
}
sub print_help () {
print_revision($PROGNAME, '$Revision: 1115 $') ;
print "Copyright (c) 2004 J Meek/Karl DeBisschop
This plugin checks whether traceroute to the destination succeeds and if so that the route string option (-R) matches the list of routers
returned by traceroute.
";
print_usage();
print "
-d
Debug
-h
Help
-i
_TODO_
Max inter-hop delay (msec).
-H
Host.
-N
Max number of hops.
-r
Record current route (and output to STDOUT). Useful for getting the value of -R option ...
-v
Greater verbosity.
-R
Mandatory route string ie r1-r2-... where ri is the ip address of the ith router.
-T
Maximum time (seconds) to wait for the traceroute command to complete. Defaults to $TIMEOUT seconds.
";
support();
}
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