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pkg-monitoring-plugins/plugins-scripts/check_ifoperstatus.pl

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Perl
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#!/usr/local/bin/perl -w
#
# check_ifoperstatus.pl - nagios plugin
#
# Copyright (C) 2000 Christoph Kron,
# Modified 5/2002 to conform to updated Nagios Plugin Guidelines
# Added support for named interfaces per Valdimir Ivaschenko (S. Ghosh)
# Added SNMPv3 support (10/2003)
#
# 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: nagiosplug-help@lists.sourceforge.net
#
# 11.01.2000 Version 1.0
# $Id: check_ifoperstatus.pl 1642 2007-03-16 12:11:46Z gonzai $
#
# Patches from Guy Van Den Bergh to warn on ifadminstatus down interfaces
# instead of critical.
#
# Primary MIB reference - RFC 2863
use POSIX;
use strict;
use lib utils.pm ;
use utils qw($TIMEOUT %ERRORS &print_revision &support);
use Net::SNMP;
use Getopt::Long;
&Getopt::Long::config('bundling');
my $PROGNAME = "check_ifoperstatus";
sub print_help ();
sub usage ();
sub process_arguments ();
my $timeout;
my $status;
my %ifOperStatus = ('1','up',
'2','down',
'3','testing',
'4','unknown',
'5','dormant',
'6','notPresent',
'7','lowerLayerDown'); # down due to the state of lower layer interface(s)
my $state = "UNKNOWN";
my $answer = "";
my $snmpkey = 0;
my $community = "public";
my $maxmsgsize = 1472 ; # Net::SNMP default is 1472
my ($seclevel, $authproto, $secname, $authpass, $privpass, $auth, $priv, $context);
my $port = 161;
my @snmpoids;
my $sysUptime = '1.3.6.1.2.1.1.3.0';
my $snmpIfDescr = '1.3.6.1.2.1.2.2.1.2';
my $snmpIfAdminStatus = '1.3.6.1.2.1.2.2.1.7';
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 $snmpIfLastChange = '1.3.6.1.2.1.2.2.1.9';
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 $hostname;
my $ifName;
my $session;
my $error;
my $response;
my $snmp_version = 1 ;
my $ifXTable;
my $opt_h ;
my $opt_V ;
my $ifdescr;
my $key;
my $lastc;
my $dormantWarn;
my $adminWarn;
my $name;
### Validate Arguments
$status = process_arguments();
# Just in case of problems, let's not hang Nagios
$SIG{'ALRM'} = sub {
print ("ERROR: No snmp response from $hostname (alarm)\n");
exit $ERRORS{"UNKNOWN"};
};
alarm($timeout);
## map ifdescr to ifindex - should look at being able to cache this value
if (defined $ifdescr) {
# escape "/" in ifdescr - very common in the Cisco world
$ifdescr =~ s/\//\\\//g;
$status=fetch_ifdescr(); # if using on device with large number of interfaces
# recommend use of SNMP v2 (get-bulk)
if ($status==0) {
$state = "UNKNOWN";
printf "$state: could not retrive ifdescr snmpkey - $status-$snmpkey\n";
$session->close;
exit $ERRORS{$state};
}
}
## Main function
$snmpIfAdminStatus = $snmpIfAdminStatus . "." . $snmpkey;
$snmpIfOperStatus = $snmpIfOperStatus . "." . $snmpkey;
$snmpIfDescr = $snmpIfDescr . "." . $snmpkey;
$snmpIfName = $snmpIfName . "." . $snmpkey ;
$snmpIfAlias = $snmpIfAlias . "." . $snmpkey ;
push(@snmpoids,$snmpIfAdminStatus);
push(@snmpoids,$snmpIfOperStatus);
push(@snmpoids,$snmpIfDescr);
push(@snmpoids,$snmpIfName) if (defined $ifXTable) ;
push(@snmpoids,$snmpIfAlias) if (defined $ifXTable) ;
if (!defined($response = $session->get_request(@snmpoids))) {
$answer=$session->error;
$session->close;
$state = 'WARNING';
print ("$state: SNMP error: $answer\n");
exit $ERRORS{$state};
}
$answer = sprintf("host '%s', %s(%s) is %s\n",
$hostname,
$response->{$snmpIfDescr},
$snmpkey,
$ifOperStatus{$response->{$snmpIfOperStatus}}
);
## Check to see if ifName match is requested and it matches - exit if no match
## not the interface we want to monitor
if ( defined $name && not ($response->{$snmpIfName} eq $name) ) {
$state = 'UNKNOWN';
$answer = "Interface name ($name) doesn't match snmp value ($response->{$snmpIfName}) (index $snmpkey)";
print ("$state: $answer");
exit $ERRORS{$state};
}
## define the interface name
if (defined $ifXTable) {
$name = $response->{$snmpIfName} ." - " .$response->{$snmpIfAlias} ;
}else{
$name = $response->{$snmpIfDescr} ;
}
## if AdminStatus is down - some one made a consious effort to change config
##
if ( not ($response->{$snmpIfAdminStatus} == 1) ) {
$answer = "Interface $name (index $snmpkey) is administratively down.";
if ( not defined $adminWarn or $adminWarn eq "w" ) {
$state = 'WARNING';
} elsif ( $adminWarn eq "i" ) {
$state = 'OK';
} elsif ( $adminWarn eq "c" ) {
$state = 'CRITICAL';
} else { # If wrong value for -a, say warning
$state = 'WARNING';
}
}
## Check operational status
elsif ( $response->{$snmpIfOperStatus} == 2 ) {
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) is down.";
} elsif ( $response->{$snmpIfOperStatus} == 5 ) {
if (defined $dormantWarn ) {
if ($dormantWarn eq "w") {
$state = 'WARNING';
$answer = "Interface $name (index $snmpkey) is dormant.";
}elsif($dormantWarn eq "c") {
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) is dormant.";
}elsif($dormantWarn eq "i") {
$state = 'OK';
$answer = "Interface $name (index $snmpkey) is dormant.";
}
}else{
# dormant interface - but warning/critical/ignore not requested
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) is dormant.";
}
} elsif ( $response->{$snmpIfOperStatus} == 6 ) {
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) notPresent - possible hotswap in progress.";
} elsif ( $response->{$snmpIfOperStatus} == 7 ) {
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) down due to lower layer being down.";
} elsif ( $response->{$snmpIfOperStatus} == 3 || $response->{$snmpIfOperStatus} == 4 ) {
$state = 'CRITICAL';
$answer = "Interface $name (index $snmpkey) down (testing/unknown).";
} else {
$state = 'OK';
$answer = "Interface $name (index $snmpkey) is up.";
}
print ("$state: $answer");
exit $ERRORS{$state};
### subroutines
sub fetch_ifdescr {
if (!defined ($response = $session->get_table($snmpIfDescr))) {
$answer=$session->error;
$session->close;
$state = 'CRITICAL';
printf ("$state: SNMP error with snmp version $snmp_version ($answer)\n");
$session->close;
exit $ERRORS{$state};
}
foreach $key ( keys %{$response}) {
if ($response->{$key} =~ /^$ifdescr$/) {
$key =~ /.*\.(\d+)$/;
$snmpkey = $1;
#print "$ifdescr = $key / $snmpkey \n"; #debug
}
}
unless (defined $snmpkey) {
$session->close;
$state = 'CRITICAL';
printf "$state: Could not match $ifdescr on $hostname\n";
exit $ERRORS{$state};
}
return $snmpkey;
}
sub usage() {
printf "\nMissing arguments!\n";
printf "\n";
printf "usage: \n";
printf "check_ifoperstatus -k <IF_KEY> -H <HOSTNAME> [-C <community>]\n";
printf "Copyright (C) 2000 Christoph Kron\n";
printf "check_ifoperstatus.pl comes with ABSOLUTELY NO WARRANTY\n";
printf "This programm is licensed under the terms of the ";
printf "GNU General Public License\n(check source code for details)\n";
printf "\n\n";
exit $ERRORS{"UNKNOWN"};
}
sub print_help() {
printf "check_ifoperstatus plugin for Nagios monitors operational \n";
printf "status of a particular network interface on the target host\n";
printf "\nUsage:\n";
printf " -H (--hostname) Hostname to query - (required)\n";
printf " -C (--community) SNMP read community (defaults to public,\n";
printf " used with SNMP v1 and v2c\n";
printf " -v (--snmp_version) 1 for SNMP v1 (default)\n";
printf " 2 for SNMP v2c\n";
printf " SNMP v2c will use get_bulk for less overhead\n";
printf " if monitoring with -d\n";
printf " -L (--seclevel) choice of \"noAuthNoPriv\", \"authNoPriv\", or \"authPriv\"\n";
printf " -U (--secname) username for SNMPv3 context\n";
printf " -c (--context) SNMPv3 context name (default is empty string)";
printf " -A (--authpass) authentication password (cleartext ascii or localized key\n";
printf " in hex with 0x prefix generated by using \"snmpkey\" utility\n";
printf " auth password and authEngineID\n";
printf " -a (--authproto) Authentication protocol ( MD5 or SHA1)\n";
printf " -X (--privpass) privacy password (cleartext ascii or localized key\n";
printf " in hex with 0x prefix generated by using \"snmpkey\" utility\n";
printf " privacy password and authEngineID\n";
printf " -k (--key) SNMP IfIndex value\n";
printf " -d (--descr) SNMP ifDescr value\n";
printf " -p (--port) SNMP port (default 161)\n";
printf " -I (--ifmib) Agent supports IFMIB ifXTable. Do not use if\n";
printf " you don't know what this is. \n";
printf " -n (--name) the value should match the returned ifName\n";
printf " (Implies the use of -I)\n";
printf " -w (--warn =i|w|c) ignore|warn|crit if the interface is dormant (default critical)\n";
printf " -D (--admin-down =i|w|c) same for administratively down interfaces (default warning)\n";
printf " -M (--maxmsgsize) Max message size - usefull only for v1 or v2c\n";
printf " -t (--timeout) seconds before the plugin times out (default=$TIMEOUT)\n";
printf " -V (--version) Plugin version\n";
printf " -h (--help) usage help \n\n";
printf " -k or -d must be specified\n\n";
printf "Note: either -k or -d must be specified and -d is much more network \n";
printf "intensive. Use it sparingly or not at all. -n is used to match against\n";
printf "a much more descriptive ifName value in the IfXTable to verify that the\n";
printf "snmpkey has not changed to some other network interface after a reboot.\n\n";
print_revision($PROGNAME, '$Revision: 1642 $');
}
sub process_arguments() {
$status = GetOptions(
"V" => \$opt_V, "version" => \$opt_V,
"h" => \$opt_h, "help" => \$opt_h,
"v=i" => \$snmp_version, "snmp_version=i" => \$snmp_version,
"C=s" => \$community, "community=s" => \$community,
"L=s" => \$seclevel, "seclevel=s" => \$seclevel,
"a=s" => \$authproto, "authproto=s" => \$authproto,
"U=s" => \$secname, "secname=s" => \$secname,
"A=s" => \$authpass, "authpass=s" => \$authpass,
"X=s" => \$privpass, "privpass=s" => \$privpass,
"c=s" => \$context, "context=s" => \$context,
"k=i" => \$snmpkey, "key=i",\$snmpkey,
"d=s" => \$ifdescr, "descr=s" => \$ifdescr,
"l=s" => \$lastc, "lastchange=s" => \$lastc,
"p=i" => \$port, "port=i" =>\$port,
"H=s" => \$hostname, "hostname=s" => \$hostname,
"I" => \$ifXTable, "ifmib" => \$ifXTable,
"n=s" => \$ifName, "name=s" => \$ifName,
"w=s" => \$dormantWarn, "warn=s" => \$dormantWarn,
"D=s" => \$adminWarn, "admin-down=s" => \$adminWarn,
"M=i" => \$maxmsgsize, "maxmsgsize=i" => \$maxmsgsize,
"t=i" => \$timeout, "timeout=i" => \$timeout,
);
if ($status == 0){
print_help();
exit $ERRORS{'OK'};
}
if ($opt_V) {
print_revision($PROGNAME,'$Revision: 1642 $ ');
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 $secname) {
# Must define a security level even though defualt is noAuthNoPriv
unless ( grep /^$seclevel$/, qw(noAuthNoPriv authNoPriv authPriv) ) {
usage();
exit $ERRORS{"UNKNOWN"};
}
# Authentication wanted
if ( $seclevel eq 'authNoPriv' || $seclevel eq 'authPriv' ) {
unless ( $authproto eq 'MD5' || $authproto eq '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
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