448 lines
13 KiB
Perl
Executable file
448 lines
13 KiB
Perl
Executable file
#!@PERL@ -w
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#
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# check_ifstatus.pl - monitoring 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 Monitoring Plugins Guidelines (S. Ghosh)
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# Added -x option (4/2003)
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# Added -u option (4/2003)
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# Added -M option (10/2003)
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# Added SNMPv3 support (10/2003)
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# Added -n option (07/2014)
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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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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#
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#
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# Report bugs to: ck@zet.net, help@monitoring-plugins.org
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#
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# 11.01.2000 Version 1.0
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#
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use POSIX;
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use strict;
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use FindBin;
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use lib "$FindBin::Bin";
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use utils qw($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::Configure('bundling');
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my $PROGNAME = "check_ifstatus";
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sub print_help ();
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sub usage ($);
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sub print_usage ();
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sub process_arguments ();
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$ENV{'PATH'}='@TRUSTED_PATH@';
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$ENV{'BASH_ENV'}='';
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$ENV{'ENV'}='';
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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 $timeout ;
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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 $maxmsgsize = 1472 ; # Net::SNMP default is 1472
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my ($seclevel, $authproto, $secname, $authpass, $privpass, $privproto, $auth, $priv, $context);
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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 $snmpIfType = '1.3.6.1.2.1.2.2.1.3';
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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 $ifexclude = 0 ;
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my $ifunused = 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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my $opt_u;
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my $opt_n;
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my $opt_x ;
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my %excluded ;
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my %unused_names ;
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my @unused_ports ;
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my %session_opts;
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# Just in case of problems, let's not hang the monitoring system
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$SIG{'ALRM'} = sub {
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print ("ERROR: No snmp response from $hostname (alarm timeout)\n");
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exit $ERRORS{"UNKNOWN"};
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};
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#Option checking
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$status = process_arguments();
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if ($status != 0)
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{
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print_help() ;
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exit $ERRORS{'UNKNOWN'};
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}
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alarm($timeout);
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($session, $error) = Net::SNMP->session(%session_opts);
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if (!defined($session)) {
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$state='UNKNOWN';
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$answer=$error;
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print ("$state: $answer\n");
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exit $ERRORS{$state};
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}
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push(@snmpoids,$snmpIfOperStatus);
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push(@snmpoids,$snmpIfAdminStatus);
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push(@snmpoids,$snmpIfDescr);
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push(@snmpoids,$snmpIfType);
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push(@snmpoids,$snmpIfName) if ( defined $ifXTable);
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push(@snmpoids,$snmpIfAlias) if ( defined $ifXTable);
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foreach $snmpoid (@snmpoids) {
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if (!defined($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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if ( ( $snmpoid =~ $snmpIfName ) && defined $ifXTable ) {
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print ("$state: Device does not support ifTable - try without -I option\n");
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}else{
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print ("$state: $answer for $snmpoid with snmp version $snmp_version\n");
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}
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exit $ERRORS{$state};
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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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$session->close;
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alarm(0);
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foreach $key (keys %ifStatus) {
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# skip unused interfaces
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my $ifName = $ifStatus{$key}{$snmpIfDescr};
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if (!defined($ifStatus{$key}{'notInUse'}) && !grep(/^${ifName}/, @unused_ports )) {
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# check only if interface is administratively up
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if ($ifStatus{$key}{$snmpIfAdminStatus} == 1 ) {
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#check only if interface is not excluded
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if (!defined $unused_names{$ifStatus{$key}{$snmpIfDescr}} ) {
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# check only if interface type is not listed in %excluded
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if (!defined $excluded{$ifStatus{$key}{$snmpIfType}} ) {
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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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if (defined $ifXTable) {
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$ifmessage .= sprintf("%s: down -> %s<BR>\n", $ifStatus{$key}{$snmpIfName}, $ifStatus{$key}{$snmpIfAlias});
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}else{
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$ifmessage .= sprintf("%s: down <BR>\n",$ifStatus{$key}{$snmpIfDescr});
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}
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}
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if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;}
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} else {
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$ifexclude++;
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}
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} else {
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$ifunused++;
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}
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}
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}else{
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$ifunused++;
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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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$answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d, unused: %d<BR>",
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$hostname,
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$ifup,
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$ifdown,
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$ifdormant,
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$ifexclude,
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$ifunused);
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$answer = $answer . $ifmessage . "\n";
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}
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else {
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$state = 'OK';
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$answer = sprintf("host '%s', interfaces up: %d, down: %d, dormant: %d, excluded: %d, unused: %d",
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$hostname,
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$ifup,
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$ifdown,
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$ifdormant,
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$ifexclude,
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$ifunused);
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}
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my $perfdata = sprintf("up=%d down=%d dormant=%d excluded=%d unused=%d",$ifup,$ifdown,$ifdormant,$ifexclude,$ifunused);
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print ("$state: $answer |$perfdata\n");
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exit $ERRORS{$state};
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sub usage($) {
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print "$_[0]\n";
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print_usage();
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exit $ERRORS{"UNKNOWN"};
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}
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sub print_usage() {
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printf "\n";
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printf "usage: \n";
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printf "check_ifstatus -C <READCOMMUNITY> -p <PORT> -H <HOSTNAME>\n";
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printf "Copyright (C) 2000 Christoph Kron\n";
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printf "Updates 5/2002 Subhendu Ghosh\n";
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support();
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printf "\n\n";
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}
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sub print_help() {
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print_revision($PROGNAME, '@NP_VERSION@');
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print_usage();
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printf "check_ifstatus plugin for monitoring 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 " 3 for SNMPv3 (requires -U option)";
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printf " -p (--port) SNMP port (default 161)\n";
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printf " -I (--ifmib) Agent supports IFMIB ifXTable. For Cisco - this will provide\n";
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printf " the descriptive name. Do not use if you don't know what this is. \n";
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printf " -x (--exclude) A comma separated list of ifType values that should be excluded \n";
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printf " from the report (default for an empty list is PPP(23).\n";
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printf " -n (--unused_ports_by_name) A comma separated list of ifDescr values that should be excluded \n";
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printf " from the report (default is an empty exclusion list).\n";
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printf " -u (--unused_ports) A comma separated list of ifIndex values that should be excluded \n";
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printf " from the report (default is an empty exclusion list).\n";
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printf " See the IANAifType-MIB for a list of interface types.\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)\n";
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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 " -P (--privproto) privacy protocol (DES or AES; default: DES)\n";
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printf " -M (--maxmsgsize) Max message size - useful only for v1 or v2c\n";
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printf " -t (--timeout) seconds before the plugin times out (default=$TIMEOUT)\n";
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printf " -V (--version) Plugin version\n";
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printf " -h (--help) usage help \n\n";
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print_revision($PROGNAME, '@NP_VERSION@');
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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=s" => \$snmp_version, "snmp_version=s" => \$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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"P=s" => \$privproto, "privproto=s" => \$privproto,
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"c=s" => \$context, "context=s" => \$context,
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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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"x:s" => \$opt_x, "exclude:s" => \$opt_x,
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"u=s" => \$opt_u, "unused_ports=s" => \$opt_u,
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"n=s" => \$opt_n, "unused_ports_by_name=s" => \$opt_n,
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"M=i" => \$maxmsgsize, "maxmsgsize=i" => \$maxmsgsize,
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"t=i" => \$timeout, "timeout=i" => \$timeout,
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);
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if ($status == 0){
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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if ($opt_V) {
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print_revision($PROGNAME,'@NP_VERSION@');
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exit $ERRORS{'UNKNOWN'};
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}
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if ($opt_h) {
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print_help();
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exit $ERRORS{'UNKNOWN'};
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}
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unless (defined $timeout) {
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$timeout = $TIMEOUT;
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}
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# Net::SNMP wants an integer
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$snmp_version = 2 if $snmp_version eq "2c";
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if ($snmp_version !~ /^[123]$/){
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$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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%session_opts = (
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-hostname => $hostname,
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-port => $port,
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-version => $snmp_version,
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-maxmsgsize => $maxmsgsize
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);
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$session_opts{'-community'} = $community if (defined $community && $snmp_version =~ /[12]/);
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if ($snmp_version =~ /3/ ) {
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# Must define a security level even though default is noAuthNoPriv
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# v3 requires a security username
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if (defined $seclevel && defined $secname) {
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$session_opts{'-username'} = $secname;
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# Must define a security level even though default is noAuthNoPriv
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unless ( grep /^$seclevel$/, qw(noAuthNoPriv authNoPriv authPriv) ) {
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usage("Must define a valid security level even though default is noAuthNoPriv");
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}
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# Authentication wanted
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if ( $seclevel eq 'authNoPriv' || $seclevel eq 'authPriv' ) {
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if (defined $authproto && $authproto ne 'MD5' && $authproto ne 'SHA1') {
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usage("Auth protocol can be either MD5 or SHA1");
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}
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$session_opts{'-authprotocol'} = $authproto if(defined $authproto);
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if ( !defined $authpass) {
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usage("Auth password/key is not defined");
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}else{
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if ($authpass =~ /^0x/ ) {
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$session_opts{'-authkey'} = $authpass ;
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}else{
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$session_opts{'-authpassword'} = $authpass ;
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}
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}
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}
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# Privacy (DES encryption) wanted
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if ($seclevel eq 'authPriv' ) {
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if (! defined $privpass) {
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usage("Privacy passphrase/key is not defined");
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}else{
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if ($privpass =~ /^0x/){
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$session_opts{'-privkey'} = $privpass;
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}else{
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$session_opts{'-privpassword'} = $privpass;
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}
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}
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$session_opts{'-privprotocol'} = $privproto if(defined $privproto);
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}
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# Context name defined or default
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unless ( defined $context) {
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$context = "";
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}
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}else {
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usage("Security level or name is not defined");
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}
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} # end snmpv3
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# Excluded interfaces types (ifType) (backup interfaces, dial-on demand interfaces, PPP interfaces
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if (defined $opt_x) {
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my @x = split(/,/, $opt_x);
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if ( @x) {
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foreach $key (@x){
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$excluded{$key} = 1;
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}
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}else{
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$excluded{23} = 1; # default PPP(23) if empty list - note (AIX seems to think PPP is 22 according to a post)
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}
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}
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# Excluded interface descriptors
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if (defined $opt_n) {
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my @unused = split(/,/,$opt_n);
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if ( @unused ) {
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foreach $key (@unused) {
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$unused_names{$key} = 1;
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}
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}
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}
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# Excluded interface ports (ifIndex) - management reasons
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if ($opt_u) {
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@unused_ports = split(/,/,$opt_u);
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foreach $key (@unused_ports) {
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$ifStatus{$key}{'notInUse'}++ ;
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}
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}
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if (! utils::is_hostname($hostname)){
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usage("Hostname invalid or not given");
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exit $ERRORS{"UNKNOWN"};
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}
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if ($snmp_version !~ /[123]/) {
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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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return $ERRORS{"OK"};
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}
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