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+#!/usr/local/bin/perl -w
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+#
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+# check_ifstatus.pl - nagios plugin
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+#
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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 (S. Ghosh)
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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: ck@zet.net, nagiosplug-help@lists.sf.net
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+#
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+# 11.01.2000 Version 1.0
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+#
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+# $Id$
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+
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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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+
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+use Net::SNMP;
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+use Getopt::Long;
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+Getopt::Long::Configure('bundling');
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+
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+my $PROGNAME = "check_ifstatus";
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+
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+
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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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+
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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 $snmpoid=0;
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+my $key=0;
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+my $community = "public";
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+my $port = 161;
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+my @snmpoids;
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+my $snmpIfAdminStatus = '1.3.6.1.2.1.2.2.1.7';
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+my $snmpIfDescr = '1.3.6.1.2.1.2.2.1.2';
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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 $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 $session;
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+my $error;
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+my $response;
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+my %ifStatus;
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+my $ifup =0 ;
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+my $ifdown =0;
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+my $ifdormant = 0;
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+my $ifmessage = "";
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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 $opt_V ;
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+
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+
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+
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+
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+
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+# Just in case of problems, let's not hang Nagios
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+$SIG{'ALRM'} = sub {
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+ print ("ERROR: No snmp response from $hostname (alarm timeout)\n");
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+ exit $ERRORS{"UNKNOWN"};
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+};
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+alarm($TIMEOUT);
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+
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+
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+
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+#Option checking
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+$status = GetOptions(
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+ "V" => \$opt_V, "version" => \$opt_V,
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+ "h" => \$opt_h, "help" => \$opt_h,
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+ "v=i" => \$snmp_version, "snmp_version=i" => \$snmp_version,
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+ "C=s" =>\$community,"community=s" => \$community,
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+ "p=i" =>\$port, "port=i" => \$port,
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+ "H=s" => \$hostname, "hostname=s" => \$hostname,
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+ "I" => \$ifXTable, "ifmib" => \$ifXTable );
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+
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+if ($status == 0)
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+{
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+ print_help() ;
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+ exit $ERRORS{'OK'};
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+}
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+
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+
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+if ($opt_V) {
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+ print_revision($PROGNAME,'$Revision$ ');
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+ exit $ERRORS{'OK'};
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+}
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+
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+if ($opt_h) {
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+ print_help();
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+ exit $ERRORS{'OK'};
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+}
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+
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+if (! utils::is_hostname($hostname)){
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+ usage();
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+ exit $ERRORS{"UNKNOWN"};
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+}
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+
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+if ( ! $snmp_version ) {
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+ $snmp_version =1 ;
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+}else{
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+ if ( $snmp_version =~ /[12]/ ) {
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+
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+ ($session, $error) = Net::SNMP->session(
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+ -hostname => $hostname,
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+ -community => $community,
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+ -port => $port,
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+ -version => $snmp_version
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+ );
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+
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+ if (!defined($session)) {
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+ $state='UNKNOWN';
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+ $answer=$error;
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+ print ("$state: $answer");
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+ exit $ERRORS{$state};
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+ }
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+
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+
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+ }elsif ( $snmp_version =~ /3/ ) {
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+ $state='UNKNOWN';
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+ print ("$state: No support for SNMP v3 yet\n");
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+ exit $ERRORS{$state};
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+ }else{
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+ $state='UNKNOWN';
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+ print ("$state: No support for SNMP v$snmp_version yet\n");
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+ exit $ERRORS{$state};
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+ }
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+}
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+
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+
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+
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+push(@snmpoids,$snmpIfOperStatus);
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+push(@snmpoids,$snmpIfAdminStatus);
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+push(@snmpoids,$snmpIfDescr);
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+push(@snmpoids,$snmpIfName) if ( defined $ifXTable);
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+
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+
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+
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+foreach $snmpoid (@snmpoids) {
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+
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+ if (!defined($response = $session->get_table($snmpoid))) {
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+ $answer=$session->error;
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+ $session->close;
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+ $state = 'CRITICAL';
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+ print ("$state: $answer for $snmpoid with snmp version $snmp_version\n");
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+ exit $ERRORS{$state};
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+ }
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+
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+ foreach $snmpkey (keys %{$response}) {
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+ $snmpkey =~ /.*\.(\d+)$/;
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+ $key = $1;
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+ $ifStatus{$key}{$snmpoid} = $response->{$snmpkey};
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+ }
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+}
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+
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+
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+$session->close;
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+
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+foreach $key (keys %ifStatus) {
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+
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+ # check only if interface is administratively up
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+ if ($ifStatus{$key}{$snmpIfAdminStatus} == 1 ) {
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+ if ($ifStatus{$key}{$snmpIfOperStatus} == 1 ) { $ifup++ ;}
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+ if ($ifStatus{$key}{$snmpIfOperStatus} == 2 ) {
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+ $ifdown++ ;
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+ $ifmessage .= sprintf("%s: down -> %s<BR>",
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+ $ifStatus{$key}{$snmpIfDescr},
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+ $ifStatus{$key}{$snmpIfName});
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+
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+ }
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+ if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;}
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+ }
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+ }
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+
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+
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+ if ($ifdown > 0) {
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+ $state = 'CRITICAL';
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+ $answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d<BR>",
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+ $hostname,
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+ $ifup,
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+ $ifdown,
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+ $ifdormant);
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+ $answer = $answer . $ifmessage . "\n";
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+ }
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+ else {
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+ $state = 'OK';
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+ $answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d\n",
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+ $hostname,
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+ $ifup,
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+ $ifdown,
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+ $ifdormant);
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+ }
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+
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+print ("$state: $answer");
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+exit $ERRORS{$state};
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+
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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 "check_ifstatus -C <READCOMMUNITY> -p <PORT> -H <HOSTNAME>\n";
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+ printf "Copyright (C) 2000 Christoph Kron\n";
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+ printf "Updates 5/2002 Subhendu Ghosh\n";
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+ printf "\n\n";
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+ support();
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+ exit $ERRORS{"UNKNOWN"};
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+}
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+
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+sub print_help {
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+ printf "check_ifstatus plugin for Nagios monitors operational \n";
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+ printf "status of each network interface on the target host\n";
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+ printf "\nUsage:\n";
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+ printf " -H (--hostname) Hostname to query - (required)\n";
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+ printf " -C (--community) SNMP read community (defaults to public,\n";
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+ printf " used with SNMP v1 and v2c\n";
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+ printf " -v (--snmp_version) 1 for SNMP v1 (default)\n";
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+ printf " 2 for SNMP v2c\n";
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+ printf " SNMP v2c will use get_bulk for less overhead\n";
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+ printf " -p (--port) SNMP port (default 161)\n";
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+ printf " -I (--ifmib) Agent supports IFMIB ifXTable. Do not use if\n";
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+ printf " you don't know what this is.\n";
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+ printf " -V (--version) Plugin version\n";
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+ printf " -h (--help) usage help \n\n";
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+ print_revision($PROGNAME, '$Revision$');
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+
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+}
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