#!/usr/local/bin/perl -w # # check_ifstatus.pl - nagios plugin # # # Copyright (C) 2000 Christoph Kron # Modified 5/2002 to conform to updated Nagios Plugin Guidelines (S. Ghosh) # # 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. # # # Report bugs to: ck@zet.net, nagiosplug-help@lists.sf.net # # 11.01.2000 Version 1.0 # # $Id$ use POSIX; use strict; use lib utils.pm ; use utils qw($TIMEOUT %ERRORS &print_revision &support); use Net::SNMP; use Getopt::Long; Getopt::Long::Configure('bundling'); my $PROGNAME = "check_ifstatus"; my $status; my %ifOperStatus = ('1','up', '2','down', '3','testing', '4','unknown', '5','dormant', '6','notPresent'); my $state = "UNKNOWN"; my $answer = ""; my $snmpkey=0; my $snmpoid=0; my $key=0; my $community = "public"; my $port = 161; my @snmpoids; my $snmpIfAdminStatus = '1.3.6.1.2.1.2.2.1.7'; my $snmpIfDescr = '1.3.6.1.2.1.2.2.1.2'; my $snmpIfOperStatus = '1.3.6.1.2.1.2.2.1.8'; my $snmpIfName = '1.3.6.1.2.1.31.1.1.1.1'; my $snmpIfAlias = '1.3.6.1.2.1.31.1.1.1.18'; my $snmpLocIfDescr = '1.3.6.1.4.1.9.2.2.1.1.28'; my $snmpIfType = '1.3.6.1.2.1.2.2.1.3'; my $hostname; my $session; my $error; my $response; my %ifStatus; my $ifup =0 ; my $ifdown =0; my $ifdormant = 0; my $ifexclude =0 ; my $ifmessage = ""; my $snmp_version = 1; my $ifXTable; my $opt_h ; my $opt_V ; my $opt_x ; my %excluded ; # Just in case of problems, let's not hang Nagios $SIG{'ALRM'} = sub { print ("ERROR: No snmp response from $hostname (alarm timeout)\n"); exit $ERRORS{"UNKNOWN"}; }; alarm($TIMEOUT); #Option checking $status = GetOptions( "V" => \$opt_V, "version" => \$opt_V, "h" => \$opt_h, "help" => \$opt_h, "v=i" => \$snmp_version, "snmp_version=i" => \$snmp_version, "C=s" =>\$community,"community=s" => \$community, "p=i" =>\$port, "port=i" => \$port, "H=s" => \$hostname, "hostname=s" => \$hostname, "I" => \$ifXTable, "ifmib" => \$ifXTable, "x:s" => \$opt_x, "exclude:s" => \$opt_x); if ($status == 0) { print_help() ; exit $ERRORS{'OK'}; } if ($opt_V) { print_revision($PROGNAME,'$Revision$ '); exit $ERRORS{'OK'}; } if ($opt_h) { print_help(); exit $ERRORS{'OK'}; } if (defined $opt_x) { my @x = split(",", $opt_x); my $x; if ( @x) { foreach $x (@x){ $excluded{$x} = 1; } }else{ $excluded{23} = 1; # default PPP(23) if empty list - note (AIX seems to think PPP is 22 according to a post) } #debugging #foreach $x (keys %excluded) # { print "key = $x val = $excluded{$x}\n";} } if (! utils::is_hostname($hostname)){ usage(); exit $ERRORS{"UNKNOWN"}; } if ( ! $snmp_version ) { $snmp_version =1 ; }else{ if ( $snmp_version =~ /[12]/ ) { ($session, $error) = Net::SNMP->session( -hostname => $hostname, -community => $community, -port => $port, -version => $snmp_version ); if (!defined($session)) { $state='UNKNOWN'; $answer=$error; print ("$state: $answer"); exit $ERRORS{$state}; } }elsif ( $snmp_version =~ /3/ ) { $state='UNKNOWN'; print ("$state: No support for SNMP v3 yet\n"); exit $ERRORS{$state}; }else{ $state='UNKNOWN'; print ("$state: No support for SNMP v$snmp_version yet\n"); exit $ERRORS{$state}; } } push(@snmpoids,$snmpIfOperStatus); push(@snmpoids,$snmpIfAdminStatus); push(@snmpoids,$snmpIfDescr); push(@snmpoids,$snmpIfType); push(@snmpoids,$snmpIfName) if ( defined $ifXTable); push(@snmpoids,$snmpIfAlias) if ( defined $ifXTable); foreach $snmpoid (@snmpoids) { if (!defined($response = $session->get_table($snmpoid))) { $answer=$session->error; $session->close; $state = 'CRITICAL'; if ( ( $snmpoid =~ $snmpIfName ) && defined $ifXTable ) { print ("$state: Device does not support ifTable - try without -I option\n"); }else{ print ("$state: $answer for $snmpoid with snmp version $snmp_version\n"); } exit $ERRORS{$state}; } foreach $snmpkey (keys %{$response}) { $snmpkey =~ /.*\.(\d+)$/; $key = $1; $ifStatus{$key}{$snmpoid} = $response->{$snmpkey}; } } $session->close; foreach $key (keys %ifStatus) { # check only if interface is administratively up if ($ifStatus{$key}{$snmpIfAdminStatus} == 1 ) { # check only if interface type is not listed in %excluded if (!defined $excluded{$ifStatus{$key}{$snmpIfType}} ) { if ($ifStatus{$key}{$snmpIfOperStatus} == 1 ) { $ifup++ ;} if ($ifStatus{$key}{$snmpIfOperStatus} == 2 ) { $ifdown++ ; if (defined $ifXTable) { $ifmessage .= sprintf("%s: down -> %s
", $ifStatus{$key}{$snmpIfName}, $ifStatus{$key}{$snmpIfAlias}); }else{ $ifmessage .= sprintf("%s: down
", $ifStatus{$key}{$snmpIfDescr}); } } if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;} }else{ $ifexclude++; } } } if ($ifdown > 0) { $state = 'CRITICAL'; $answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d
", $hostname, $ifup, $ifdown, $ifdormant, $ifexclude); $answer = $answer . $ifmessage . "\n"; } else { $state = 'OK'; $answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d", $hostname, $ifup, $ifdown, $ifdormant, $ifexclude); } my $perfdata = sprintf("up:%d,down:%d,dormant:%d,excluded:%d",$ifup,$ifdown,$ifdormant,$ifexclude); print ("$state: $answer |$perfdata\n"); exit $ERRORS{$state}; sub usage { printf "\nMissing arguments!\n"; printf "\n"; printf "check_ifstatus -C -p -H \n"; printf "Copyright (C) 2000 Christoph Kron\n"; printf "Updates 5/2002 Subhendu Ghosh\n"; printf "\n\n"; support(); exit $ERRORS{"UNKNOWN"}; } sub print_help { printf "check_ifstatus plugin for Nagios monitors operational \n"; printf "status of each network interface on the target host\n"; printf "\nUsage:\n"; printf " -H (--hostname) Hostname to query - (required)\n"; printf " -C (--community) SNMP read community (defaults to public,\n"; printf " used with SNMP v1 and v2c\n"; printf " -v (--snmp_version) 1 for SNMP v1 (default)\n"; printf " 2 for SNMP v2c\n"; printf " SNMP v2c will use get_bulk for less overhead\n"; printf " -p (--port) SNMP port (default 161)\n"; printf " -I (--ifmib) Agent supports IFMIB ifXTable. For Cisco - this will provide\n"; printf " the descriptive name. Do not use if you don't know what this is. \n"; printf " -x (--exclude) A comma separated list of ifType values that should be excluded \n"; printf " from the report (default for an empty list is PPP(23).\n"; printf " See the IANAifType-MIB for a list of interface types.\n"; printf " -V (--version) Plugin version\n"; printf " -h (--help) usage help \n\n"; print_revision($PROGNAME, '$Revision$'); }