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#!/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)
# Added -x option (4/2003)
# Added -u option (4/2003)
#
# 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 $ifunused = 0;
my $ifmessage = "";
my $snmp_version = 1;
my $ifXTable;
my $opt_h ;
my $opt_V ;
my $opt_u;
my $opt_x ;
my %excluded ;
my @unused_ports ;
# 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
$status = GetOptions(
"V" => \$opt_V, "version" => \$opt_V,
"h" => \$opt_h, "help" => \$opt_h,
"v=i" => \$snmp_version, "snmp_version=i" => \$snmp_version,
"C=s" =>\$community,"community=s" => \$community,
"p=i" =>\$port, "port=i" => \$port,
"H=s" => \$hostname, "hostname=s" => \$hostname,
"I" => \$ifXTable, "ifmib" => \$ifXTable,
"x:s" => \$opt_x, "exclude:s" => \$opt_x,
"u=s" => \$opt_u, "unused_ports=s" => \$opt_u);
if ($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);
if ( @x) {
foreach $key (@x){
$excluded{$key} = 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 ($opt_u) {
@unused_ports = split(/,/,$opt_u);
foreach $key (@unused_ports) {
$ifStatus{$key}{'notInUse'}++ ;
}
}
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 $key (keys %ifStatus) {
# skip unused interfaces
if (!defined($ifStatus{$key}{'notInUse'})) {
# check only if interface is administratively up
if ($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<BR>",
$ifStatus{$key}{$snmpIfName},
$ifStatus{$key}{$snmpIfAlias});
}else{
$ifmessage .= sprintf("%s: down <BR>",
$ifStatus{$key}{$snmpIfDescr});
}
}
if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;}
}else{
$ifexclude++;
}
}
}else{
$ifunused++;
}
}
if ($ifdown > 0) {
$state = 'CRITICAL';
$answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d, unused: %d<BR>",
$hostname,
$ifup,
$ifdown,
$ifdormant,
$ifexclude,
$ifunused);
$answer = $answer . $ifmessage . "\n";
}
else {
$state = 'OK';
$answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d, unused: %d",
$hostname,
$ifup,
$ifdown,
$ifdormant,
$ifexclude,
$ifunused);
}
my $perfdata = sprintf("up:%d,down:%d,dormant:%d,excluded:%d,unused:%d",$ifup,$ifdown,$ifdormant,$ifexclude,$ifunused);
print ("$state: $answer |$perfdata\n");
exit $ERRORS{$state};
sub usage {
printf "\nMissing arguments!\n";
printf "\n";
printf "check_ifstatus -C <READCOMMUNITY> -p <PORT> -H <HOSTNAME>\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, '$Revision$');
}
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