506 lines
15 KiB
Perl
506 lines
15 KiB
Perl
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#!/usr/local/bin/perl -w
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#
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# check_ifoperstatus.pl - nagios plugin
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#
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# Copyright (C) 2000 Christoph Kron,
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# Modified 5/2002 to conform to updated Nagios Plugin Guidelines
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# Added support for named interfaces per Valdimir Ivaschenko (S. Ghosh)
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# Added SNMPv3 support (10/2003)
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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#
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# Report bugs to: nagiosplug-help@lists.sourceforge.net
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#
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# 11.01.2000 Version 1.0
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# $Id: check_ifoperstatus.pl,v 1.6 2004/12/07 03:13:14 mattkent Exp $
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#
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# Patches from Guy Van Den Bergh to warn on ifadminstatus down interfaces
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# instead of critical.
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#
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# Primary MIB reference - RFC 2863
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use POSIX;
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use strict;
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use lib utils.pm ;
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use utils qw($TIMEOUT %ERRORS &print_revision &support);
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use Net::SNMP;
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use Getopt::Long;
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&Getopt::Long::config('bundling');
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my $PROGNAME = "check_ifoperstatus";
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sub print_help ();
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sub usage ();
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sub process_arguments ();
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my $timeout;
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my $status;
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my %ifOperStatus = ('1','up',
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'2','down',
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'3','testing',
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'4','unknown',
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'5','dormant',
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'6','notPresent',
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'7','lowerLayerDown'); # down due to the state of lower layer interface(s)
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my $state = "UNKNOWN";
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my $answer = "";
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my $snmpkey = 0;
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my $community = "public";
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my $maxmsgsize = 1472 ; # Net::SNMP default is 1472
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my ($seclevel, $authproto, $secname, $authpass, $privpass, $auth, $priv, $context);
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my $port = 161;
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my @snmpoids;
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my $sysUptime = '1.3.6.1.2.1.1.3.0';
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my $snmpIfDescr = '1.3.6.1.2.1.2.2.1.2';
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my $snmpIfAdminStatus = '1.3.6.1.2.1.2.2.1.7';
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my $snmpIfOperStatus = '1.3.6.1.2.1.2.2.1.8';
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my $snmpIfName = '1.3.6.1.2.1.31.1.1.1.1';
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my $snmpIfLastChange = '1.3.6.1.2.1.2.2.1.9';
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my $snmpIfAlias = '1.3.6.1.2.1.31.1.1.1.18';
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my $snmpLocIfDescr = '1.3.6.1.4.1.9.2.2.1.1.28';
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my $hostname;
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my $ifName;
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my $session;
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my $error;
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my $response;
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my $snmp_version = 1 ;
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my $ifXTable;
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my $opt_h ;
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my $opt_V ;
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my $ifdescr;
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my $key;
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my $lastc;
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my $dormantWarn;
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my $adminWarn;
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my $name;
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### Validate Arguments
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$status = process_arguments();
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# Just in case of problems, let's not hang Nagios
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$SIG{'ALRM'} = sub {
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print ("ERROR: No snmp response from $hostname (alarm)\n");
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exit $ERRORS{"UNKNOWN"};
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};
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alarm($timeout);
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## map ifdescr to ifindex - should look at being able to cache this value
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if (defined $ifdescr) {
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# escape "/" in ifdescr - very common in the Cisco world
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$ifdescr =~ s/\//\\\//g;
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$status=fetch_ifdescr(); # if using on device with large number of interfaces
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# recommend use of SNMP v2 (get-bulk)
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if ($status==0) {
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$state = "UNKNOWN";
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printf "$state: could not retrive ifdescr snmpkey - $status-$snmpkey\n";
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$session->close;
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exit $ERRORS{$state};
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}
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}
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## Main function
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$snmpIfAdminStatus = $snmpIfAdminStatus . "." . $snmpkey;
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$snmpIfOperStatus = $snmpIfOperStatus . "." . $snmpkey;
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$snmpIfDescr = $snmpIfDescr . "." . $snmpkey;
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$snmpIfName = $snmpIfName . "." . $snmpkey ;
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$snmpIfAlias = $snmpIfAlias . "." . $snmpkey ;
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push(@snmpoids,$snmpIfAdminStatus);
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push(@snmpoids,$snmpIfOperStatus);
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push(@snmpoids,$snmpIfDescr);
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push(@snmpoids,$snmpIfName) if (defined $ifXTable) ;
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push(@snmpoids,$snmpIfAlias) if (defined $ifXTable) ;
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if (!defined($response = $session->get_request(@snmpoids))) {
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$answer=$session->error;
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$session->close;
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$state = 'WARNING';
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print ("$state: SNMP error: $answer\n");
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exit $ERRORS{$state};
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}
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$answer = sprintf("host '%s', %s(%s) is %s\n",
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$hostname,
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$response->{$snmpIfDescr},
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$snmpkey,
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$ifOperStatus{$response->{$snmpIfOperStatus}}
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);
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## Check to see if ifName match is requested and it matches - exit if no match
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## not the interface we want to monitor
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if ( defined $name && not ($response->{$snmpIfName} eq $name) ) {
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$state = 'UNKNOWN';
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$answer = "Interface name ($name) doesn't match snmp value ($response->{$snmpIfName}) (index $snmpkey)";
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print ("$state: $answer");
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exit $ERRORS{$state};
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}
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## define the interface name
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if (defined $ifXTable) {
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$name = $response->{$snmpIfName} ." - " .$response->{$snmpIfAlias} ;
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}else{
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$name = $response->{$snmpIfDescr} ;
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}
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## if AdminStatus is down - some one made a consious effort to change config
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##
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if ( not ($response->{$snmpIfAdminStatus} == 1) ) {
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$answer = "Interface $name (index $snmpkey) is administratively down.";
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if ( not defined $adminWarn or $adminWarn eq "w" ) {
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$state = 'WARNING';
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} elsif ( $adminWarn eq "i" ) {
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$state = 'OK';
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} elsif ( $adminWarn eq "c" ) {
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$state = 'CRITICAL';
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} else { # If wrong value for -a, say warning
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$state = 'WARNING';
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}
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}
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## Check operational status
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elsif ( $response->{$snmpIfOperStatus} == 2 ) {
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) is down.";
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} elsif ( $response->{$snmpIfOperStatus} == 5 ) {
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if (defined $dormantWarn ) {
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if ($dormantWarn eq "w") {
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$state = 'WARNING';
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$answer = "Interface $name (index $snmpkey) is dormant.";
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}elsif($dormantWarn eq "c") {
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) is dormant.";
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}elsif($dormantWarn eq "i") {
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$state = 'OK';
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$answer = "Interface $name (index $snmpkey) is dormant.";
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}
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}else{
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# dormant interface - but warning/critical/ignore not requested
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) is dormant.";
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}
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} elsif ( $response->{$snmpIfOperStatus} == 6 ) {
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) notPresent - possible hotswap in progress.";
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} elsif ( $response->{$snmpIfOperStatus} == 7 ) {
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) down due to lower layer being down.";
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} elsif ( $response->{$snmpIfOperStatus} == 3 || $response->{$snmpIfOperStatus} == 4 ) {
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$state = 'CRITICAL';
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$answer = "Interface $name (index $snmpkey) down (testing/unknown).";
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} else {
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$state = 'OK';
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$answer = "Interface $name (index $snmpkey) is up.";
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}
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print ("$state: $answer");
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exit $ERRORS{$state};
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### subroutines
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sub fetch_ifdescr {
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if (!defined ($response = $session->get_table($snmpIfDescr))) {
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$answer=$session->error;
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$session->close;
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$state = 'CRITICAL';
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printf ("$state: SNMP error with snmp version $snmp_version ($answer)\n");
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$session->close;
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exit $ERRORS{$state};
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}
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foreach $key ( keys %{$response}) {
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if ($response->{$key} =~ /^$ifdescr$/) {
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$key =~ /.*\.(\d+)$/;
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$snmpkey = $1;
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#print "$ifdescr = $key / $snmpkey \n"; #debug
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}
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}
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unless (defined $snmpkey) {
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$session->close;
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$state = 'CRITICAL';
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printf "$state: Could not match $ifdescr on $hostname\n";
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exit $ERRORS{$state};
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}
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return $snmpkey;
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}
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sub usage() {
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printf "\nMissing arguments!\n";
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printf "\n";
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printf "usage: \n";
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printf "check_ifoperstatus -k <IF_KEY> -H <HOSTNAME> [-C <community>]\n";
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printf "Copyright (C) 2000 Christoph Kron\n";
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printf "check_ifoperstatus.pl comes with ABSOLUTELY NO WARRANTY\n";
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printf "This programm is licensed under the terms of the ";
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printf "GNU General Public License\n(check source code for details)\n";
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printf "\n\n";
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exit $ERRORS{"UNKNOWN"};
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}
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sub print_help() {
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printf "check_ifoperstatus plugin for Nagios monitors operational \n";
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printf "status of a particular network interface on the target host\n";
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printf "\nUsage:\n";
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printf " -H (--hostname) Hostname to query - (required)\n";
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printf " -C (--community) SNMP read community (defaults to public,\n";
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printf " used with SNMP v1 and v2c\n";
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printf " -v (--snmp_version) 1 for SNMP v1 (default)\n";
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printf " 2 for SNMP v2c\n";
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printf " SNMP v2c will use get_bulk for less overhead\n";
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printf " if monitoring with -d\n";
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printf " -L (--seclevel) choice of \"noAuthNoPriv\", \"authNoPriv\", or \"authPriv\"\n";
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printf " -U (--secname) username for SNMPv3 context\n";
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printf " -c (--context) SNMPv3 context name (default is empty string)";
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printf " -A (--authpass) authentication password (cleartext ascii or localized key\n";
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printf " in hex with 0x prefix generated by using \"snmpkey\" utility\n";
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printf " auth password and authEngineID\n";
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printf " -a (--authproto) Authentication protocol ( MD5 or SHA1)\n";
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printf " -X (--privpass) privacy password (cleartext ascii or localized key\n";
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printf " in hex with 0x prefix generated by using \"snmpkey\" utility\n";
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printf " privacy password and authEngineID\n";
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printf " -k (--key) SNMP IfIndex value\n";
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printf " -d (--descr) SNMP ifDescr value\n";
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printf " -p (--port) SNMP port (default 161)\n";
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printf " -I (--ifmib) Agent supports IFMIB ifXTable. Do not use if\n";
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printf " you don't know what this is. \n";
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printf " -n (--name) the value should match the returned ifName\n";
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printf " (Implies the use of -I)\n";
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printf " -w (--warn =i|w|c) ignore|warn|crit if the interface is dormant (default critical)\n";
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printf " -D (--admin-down =i|w|c) same for administratively down interfaces (default warning)\n";
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printf " -M (--maxmsgsize) Max message size - usefull only for v1 or v2c\n";
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printf " -t (--timeout) seconds before the plugin times out (default=$TIMEOUT)\n";
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printf " -V (--version) Plugin version\n";
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printf " -h (--help) usage help \n\n";
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printf " -k or -d must be specified\n\n";
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printf "Note: either -k or -d must be specified and -d is much more network \n";
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printf "intensive. Use it sparingly or not at all. -n is used to match against\n";
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printf "a much more descriptive ifName value in the IfXTable to verify that the\n";
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printf "snmpkey has not changed to some other network interface after a reboot.\n\n";
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print_revision($PROGNAME, '$Revision: 1.6 $');
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}
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sub process_arguments() {
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$status = GetOptions(
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"V" => \$opt_V, "version" => \$opt_V,
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"h" => \$opt_h, "help" => \$opt_h,
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"v=i" => \$snmp_version, "snmp_version=i" => \$snmp_version,
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"C=s" => \$community, "community=s" => \$community,
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"L=s" => \$seclevel, "seclevel=s" => \$seclevel,
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"a=s" => \$authproto, "authproto=s" => \$authproto,
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"U=s" => \$secname, "secname=s" => \$secname,
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"A=s" => \$authpass, "authpass=s" => \$authpass,
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"X=s" => \$privpass, "privpass=s" => \$privpass,
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"c=s" => \$context, "context=s" => \$context,
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"k=i" => \$snmpkey, "key=i",\$snmpkey,
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"d=s" => \$ifdescr, "descr=s" => \$ifdescr,
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"l=s" => \$lastc, "lastchange=s" => \$lastc,
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"p=i" => \$port, "port=i" =>\$port,
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"H=s" => \$hostname, "hostname=s" => \$hostname,
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"I" => \$ifXTable, "ifmib" => \$ifXTable,
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"n=s" => \$ifName, "name=s" => \$ifName,
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"w=s" => \$dormantWarn, "warn=s" => \$dormantWarn,
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"D=s" => \$adminWarn, "admin-down=s" => \$adminWarn,
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||
|
|
"M=i" => \$maxmsgsize, "maxmsgsize=i" => \$maxmsgsize,
|
||
|
|
"t=i" => \$timeout, "timeout=i" => \$timeout,
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
if ($status == 0){
|
||
|
|
print_help();
|
||
|
|
exit $ERRORS{'OK'};
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($opt_V) {
|
||
|
|
print_revision($PROGNAME,'$Revision: 1.6 $ ');
|
||
|
|
exit $ERRORS{'OK'};
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($opt_h) {
|
||
|
|
print_help();
|
||
|
|
exit $ERRORS{'OK'};
|
||
|
|
}
|
||
|
|
|
||
|
|
if (! utils::is_hostname($hostname)){
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
unless ($snmpkey > 0 || defined $ifdescr){
|
||
|
|
printf "Either a valid snmpkey key (-k) or a ifDescr (-d) must be provided)\n";
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if (defined $name) {
|
||
|
|
$ifXTable=1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (defined $dormantWarn) {
|
||
|
|
unless ($dormantWarn =~ /^(w|c|i)$/ ) {
|
||
|
|
printf "Dormant alerts must be one of w|c|i \n";
|
||
|
|
exit $ERRORS{'UNKNOWN'};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
unless (defined $timeout) {
|
||
|
|
$timeout = $TIMEOUT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($snmp_version =~ /3/ ) {
|
||
|
|
# Must define a security level even though default is noAuthNoPriv
|
||
|
|
# v3 requires a security username
|
||
|
|
if (defined $seclevel && defined $secname) {
|
||
|
|
|
||
|
|
# Must define a security level even though defualt is noAuthNoPriv
|
||
|
|
unless ($seclevel eq ('noAuthNoPriv' || 'authNoPriv' || 'authPriv' ) ) {
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}
|
||
|
|
|
||
|
|
# Authentication wanted
|
||
|
|
if ($seclevel eq ('authNoPriv' || 'authPriv') ) {
|
||
|
|
|
||
|
|
unless ($authproto eq ('MD5' || 'SHA1') ) {
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( !defined $authpass) {
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}else{
|
||
|
|
if ($authpass =~ /^0x/ ) {
|
||
|
|
$auth = "-authkey => $authpass" ;
|
||
|
|
}else{
|
||
|
|
$auth = "-authpassword => $authpass";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
# Privacy (DES encryption) wanted
|
||
|
|
if ($seclevel eq 'authPriv' ) {
|
||
|
|
if (! defined $privpass) {
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{"UNKNOWN"};
|
||
|
|
}else{
|
||
|
|
if ($privpass =~ /^0x/){
|
||
|
|
$priv = "-privkey => $privpass";
|
||
|
|
}else{
|
||
|
|
$priv = "-privpassword => $privpass";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Context name defined or default
|
||
|
|
|
||
|
|
unless ( defined $context) {
|
||
|
|
$context = "";
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
}else {
|
||
|
|
usage();
|
||
|
|
exit $ERRORS{'UNKNOWN'}; ;
|
||
|
|
}
|
||
|
|
} # end snmpv3
|
||
|
|
|
||
|
|
|
||
|
|
if ( $snmp_version =~ /[12]/ ) {
|
||
|
|
($session, $error) = Net::SNMP->session(
|
||
|
|
-hostname => $hostname,
|
||
|
|
-community => $community,
|
||
|
|
-port => $port,
|
||
|
|
-version => $snmp_version,
|
||
|
|
-maxmsgsize => $maxmsgsize
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!defined($session)) {
|
||
|
|
$state='UNKNOWN';
|
||
|
|
$answer=$error;
|
||
|
|
print ("$state: $answer");
|
||
|
|
exit $ERRORS{$state};
|
||
|
|
}
|
||
|
|
|
||
|
|
}elsif ( $snmp_version =~ /3/ ) {
|
||
|
|
|
||
|
|
if ($seclevel eq 'noAuthNoPriv') {
|
||
|
|
($session, $error) = Net::SNMP->session(
|
||
|
|
-hostname => $hostname,
|
||
|
|
-port => $port,
|
||
|
|
-version => $snmp_version,
|
||
|
|
-username => $secname,
|
||
|
|
);
|
||
|
|
|
||
|
|
}elsif ( $seclevel eq 'authNoPriv' ) {
|
||
|
|
($session, $error) = Net::SNMP->session(
|
||
|
|
-hostname => $hostname,
|
||
|
|
-port => $port,
|
||
|
|
-version => $snmp_version,
|
||
|
|
-username => $secname,
|
||
|
|
$auth,
|
||
|
|
-authprotocol => $authproto,
|
||
|
|
);
|
||
|
|
}elsif ($seclevel eq 'authPriv' ) {
|
||
|
|
($session, $error) = Net::SNMP->session(
|
||
|
|
-hostname => $hostname,
|
||
|
|
-port => $port,
|
||
|
|
-version => $snmp_version,
|
||
|
|
-username => $secname,
|
||
|
|
$auth,
|
||
|
|
-authprotocol => $authproto,
|
||
|
|
$priv
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if (!defined($session)) {
|
||
|
|
$state='UNKNOWN';
|
||
|
|
$answer=$error;
|
||
|
|
print ("$state: $answer");
|
||
|
|
exit $ERRORS{$state};
|
||
|
|
}
|
||
|
|
|
||
|
|
}else{
|
||
|
|
$state='UNKNOWN';
|
||
|
|
print ("$state: No support for SNMP v$snmp_version yet\n");
|
||
|
|
exit $ERRORS{$state};
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
## End validation
|
||
|
|
|