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source from :http://nagios.manubulon.com/check_snmp_int.pl

Snmp interface check

The script will check interface operationnal status using the MIB-II table. The interface is (are) selected by the -n option.
This option will be treated as a regular expression (eth will match eth0, eth1, eth2...). You can disable this with the -r option : the interface will be selected if it's description exactly matches the name given by -n
The interfaces are selected by their description in the MIB-II table.

To see how interface looks like by snmp, you can list all of them with the '-v' switch.

Ex : EL20005 3Com Gigabit NIC (3C2000 Family)
-s 4 will output : "EL20".
-s -4 will output : "ily)".
Performance output
-f option : activate performance output (default the In/out octet as a counter).
-e option : in/out errors and discarded packets. -f must also be set.
-S option : Include speed in performance output in bits/s as '<interface_name>_speed_bps'
-y option : output performance data in % of interface speed
-Y option : output performance data in bits/s or Bytes/s (depending on -B)
Note : -y and -Y options need the usage check to ba active (-k)
Warning : the counters needed by -e are not always available on all machines (ex Nokia IP)

-k : activates the standard usage feature
-q : activates the extended usage
-d : delta in seconds (default is 300s)
-w : warning levels
-c : critical levels
-d: delta time
You can put the delta time as an option : the "delta" is the prefered time between two values that the script will use to calculate the average Kbytes/s or error/min. The delta time should (not must) be bigger than the check interval.
Here is an example : Check interval of 2 minutes and delta of 4min

#!/usr/bin/perl -w
############################## check_snmp_int ##############
my $Version='1.24';
# Date : Oct 10 2007
# Author  : Patrick Proy ( patrick at proy.org )
# Help : http://nagios.manubulon.com
# Licence : GPL - http://www.fsf.org/licenses/gpl.txt
# Contrib : J. Jungmann, S. Probst, R. Leroy, M. Berger
# TODO :
# Maybe put base directory for performance as an option
#################################################################
#
# Help : ./check_snmp_int.pl -h
#
use strict;
use Net::SNMP;
use Getopt::Long;

############### BASE DIRECTORY FOR TEMP FILE ########
my $o_base_dir="/tmp/tmp_Nagios_int.";
my $file_history=200;   # number of data to keep in files.

# Nagios specific

my $TIMEOUT = 15;
my %ERRORS=('OK'=>0,'WARNING'=>1,'CRITICAL'=>2,'UNKNOWN'=>3,'DEPENDENT'=>4);

# SNMP Datas

my $inter_table= '.1.3.6.1.2.1.2.2.1';
my $index_table = '1.3.6.1.2.1.2.2.1.1';
my $descr_table = '1.3.6.1.2.1.2.2.1.2';
my $oper_table = '1.3.6.1.2.1.2.2.1.8.';
my $admin_table = '1.3.6.1.2.1.2.2.1.7.';
my $speed_table = '1.3.6.1.2.1.2.2.1.5.';
my $speed_table_64 = '1.3.6.1.2.1.31.1.1.1.15.';
my $in_octet_table = '1.3.6.1.2.1.2.2.1.10.';
my $in_octet_table_64 = '1.3.6.1.2.1.31.1.1.1.6.';
my $in_error_table = '1.3.6.1.2.1.2.2.1.14.';
my $in_discard_table = '1.3.6.1.2.1.2.2.1.13.';
my $out_octet_table = '1.3.6.1.2.1.2.2.1.16.';
my $out_octet_table_64 = '1.3.6.1.2.1.31.1.1.1.10.';
my $out_error_table = '1.3.6.1.2.1.2.2.1.20.';
my $out_discard_table = '1.3.6.1.2.1.2.2.1.19.';

my %status=(1=>'UP',2=>'DOWN',3=>'TESTING',4=>'UNKNOWN',5=>'DORMANT',6=>'NotPresent',7=>'lowerLayerDown');

# Globals

# Standard options
my $o_host =   undef;  # hostname
my $o_port =   161;  # port
my $o_descr =   undef;  # description filter
my $o_help=  undef;  # wan't some help ?
my $o_admin=  undef; # admin status instead of oper
my $o_inverse=   undef; # Critical when up
my $o_dormant=         undef;  # Dormant state is OK
my $o_verb=  undef; # verbose mode
my $o_version=  undef; # print version
my $o_noreg=  undef; # Do not use Regexp for name
my $o_short=  undef; # set maximum of n chars to be displayed
my $o_label=  undef; # add label before speed (in, out, etc...).
# Performance data options
my $o_perf=      undef;  # Output performance data
my $o_perfe=  undef; # Output discard/error also in perf data
my $o_perfs=  undef; # include speed in performance output (-S)
my $o_perfp=  undef; # output performance data in % of max speed (-y)
my $o_perfr=  undef; # output performance data in bits/s or Bytes/s (-Y)
# Speed/error checks
my $o_checkperf= undef; # checks in/out/err/disc values
my $o_delta=  300; # delta of time of perfcheck (default 5min)
my $o_ext_checkperf= undef;  # extended perf checks (+error+discard)
my $o_warn_opt=  undef;  # warning options
my $o_crit_opt=  undef;  # critical options
my $o_kbits=  undef; # Warn and critical in Kbits instead of KBytes
my @o_warn=  undef;  # warning levels of perfcheck
my @o_crit=  undef;  # critical levels of perfcheck
my $o_highperf=  undef; # Use 64 bits counters
my $o_meg=  undef; # output in MBytes or Mbits (-M)
my $o_gig=  undef; # output in GBytes or Gbits (-G)
my $o_prct=  undef; # output in % of max speed  (-u)

my $o_timeout=  undef;   # Timeout (Default 5)
# SNMP Message size parameter (Makina Corpus contrib)
my $o_octetlength=undef;
# Login options specific
my $o_community =  undef;  # community
my $o_version2 = undef; #use snmp v2c
my $o_login= undef;  # Login for snmpv3
my $o_passwd= undef;  # Pass for snmpv3
my $v3protocols=undef; # V3 protocol list.
my $o_authproto='md5';  # Auth protocol
my $o_privproto='des';  # Priv protocol
my $o_privpass= undef;  # priv password

# Readable names for counters (M. Berger contrib)
my @countername = ( "in=" , "out=" , "errors-in=" , "errors-out=" , "discard-in=" , "discard-out=" );
my $checkperf_out_desc;

# functions

sub read_file {
# Input : File, items_number
# Returns : array of value : [line][item]
my ($traffic_file,$items_number)=@_;
my ($ligne,$n_rows)=(undef,0); 
my (@last_values,@file_values,$i);
open(FILE,"<".$traffic_file) || return (1,0,0);

while($ligne = <FILE>)
{
chomp($ligne);
@file_values = split(":",$ligne);
#verb("@file_values");
if ($#file_values >= ($items_number-1)) {
# check if there is enough data, else ignore line
for ( $i=0 ; $i< $items_number ; $i++ ) {$last_values[$n_rows][$i]=$file_values[$i];}
$n_rows++;
}
}
close FILE;
if ($n_rows != 0) {
return (0,$n_rows,@last_values);
} else {
return (1,0,0);
}
}

sub write_file {
# Input : file , rows, items, array of value : [line][item]
# Returns : 0 / OK, 1 / error
my ($file_out,$rows,$item,@file_values)=@_;
my $start_line= ($rows > $file_history) ? $rows -  $file_history : 0;
if ( open(FILE2,">".$file_out) ) {
for (my $i=$start_line;$i<$rows;$i++) {
for (my $j=0;$j<$item;$j++) {
print FILE2 $file_values[$i][$j];
if ($j != ($item -1)) { print FILE2 ":" };
}
print FILE2 "\n";
}
close FILE2;
return 0;
} else {
return 1;
}
}

sub p_version { print "check_snmp_int version : $Version\n"; }

sub print_usage {
print "Usage: $0 [-v] -H <host> -C <snmp_community> [-2] | (-l login -x passwd [-X pass -L <authp>,<privp>)  [-p <port>] -n <name in desc_oid> [-i -a -D] [-r] [-f[eSyY]] [-k[qBMGu] -g -w<warn levels> -c<crit levels> -d<delta>] [-o <octet_length>] [-t <timeout>] [-s] --label [-V]\n";
}

sub isnnum { # Return true if arg is not a number
my $num = shift;
if ( $num =~ /^(\d+\.?\d*)|(^\.\d+)$/ ) { return 0 ;}
return 1;
}

sub help {
print "\nSNMP Network Interface Monitor for Nagios version ",$Version,"\n";
print "GPL licence, (c)2004-2007 Patrick Proy\n\n";
print_usage();
print <<EOT;
-v, --verbose
print extra debugging information (including interface list on the system)
-h, --help
print this help message
-H, --hostname=HOST
name or IP address of host to check
-C, --community=COMMUNITY NAME
community name for the host's SNMP agent (implies v1 protocol)
-l, --login=LOGIN ; -x, --passwd=PASSWD, -2, --v2c
Login and auth password for snmpv3 authentication
If no priv password exists, implies AuthNoPriv
-2 : use snmp v2c
-X, --privpass=PASSWD
Priv password for snmpv3 (AuthPriv protocol)
-L, --protocols=<authproto>,<privproto>
<authproto> : Authentication protocol (md5|sha : default md5)
<privproto> : Priv protocole (des|aes : default des)
-P, --port=PORT
SNMP port (Default 161)
-n, --name=NAME
Name in description OID (eth0, ppp0 ...).
This is treated as a regexp : -n eth will match eth0,eth1,...
Test it before, because there are known bugs (ex : trailling /)
-r, --noregexp
Do not use regexp to match NAME in description OID
-i, --inverse
Make critical when up
-a, --admin
Use administrative status instead of operational
-D, --dormant
Dormant state is an OK state
-o, --octetlength=INTEGER
max-size of the SNMP message, usefull in case of Too Long responses.
Be carefull with network filters. Range 484 - 65535, default are
usually 1472,1452,1460 or 1440.    
-f, --perfparse
Perfparse compatible output (no output when interface is down).
-e, --error
Add error & discard to Perfparse output
-S, --intspeed
Include speed in performance output in bits/s
-y, --perfprct ; -Y, --perfspeed
-y : output performance data in % of max speed
-Y : output performance data in bits/s or Bytes/s (depending on -B)  
-k, --perfcheck ; -q, --extperfcheck
-k check the input/ouput bandwidth of the interface
-q also check the error and discard input/output
--label
Add label before speed in output : in=, out=, errors-out=, etc...
-g, --64bits
Use 64 bits counters instead of the standard counters when checking
bandwidth & performance data for interface >= 1Gbps.
You must use snmp v2c or v3 to get 64 bits counters.
-d, --delta=seconds
make an average of <delta> seconds (default 300=5min)
-B, --kbits
Make the warning and critical levels in K|M|G Bits/s instead of K|M|G Bytes/s
-G, --giga ; -M, --mega ; -u, --prct
-G : Make the warning and critical levels in Gbps (with -B) or GBps
-M : Make the warning and critical levels in Mbps (with -B) or MBps
-u : Make the warning and critical levels in % of reported interface speed.
-w, --warning=input,output[,error in,error out,discard in,discard out]
warning level for input / output bandwidth (0 for no warning)
unit depends on B,M,G,u options
warning for error & discard input / output in error/min (need -q)
-c, --critical=input,output[,error in,error out,discard in,discard out]
critical level for input / output bandwidth (0 for no critical)
unit depends on B,M,G,u options
critical for error & discard input / output in error/min (need -q)
-s, --short=int
Make the output shorter : only the first <n> chars of the interface(s)
If the number is negative, then get the <n> LAST caracters.
-t, --timeout=INTEGER
timeout for SNMP in seconds (Default: 5)  
-V, --version
prints version number
Note : when multiple interface are selected with regexp,
all be must be up (or down with -i) to get an OK result.
EOT
}

# For verbose output
sub verb { my $t=shift; print $t,"\n" if defined($o_verb) ; }

sub check_options {
Getopt::Long::Configure ("bundling");
GetOptions(
'v' => \$o_verb,  'verbose' => \$o_verb,
'h'     => \$o_help,     'help'         => \$o_help,
'H:s'   => \$o_host,  'hostname:s' => \$o_host,
'p:i'   => \$o_port,     'port:i' => \$o_port,
'n:s'   => \$o_descr,           'name:s'        => \$o_descr,
'C:s'   => \$o_community, 'community:s' => \$o_community,
'2' => \$o_version2, 'v2c'  => \$o_version2,  
'l:s' => \$o_login,  'login:s' => \$o_login,
'x:s' => \$o_passwd,  'passwd:s' => \$o_passwd,
'X:s' => \$o_privpass,  'privpass:s' => \$o_privpass,
'L:s' => \$v3protocols,  'protocols:s' => \$v3protocols,  
't:i'   => \$o_timeout,     'timeout:i' => \$o_timeout,
'i' => \$o_inverse,  'inverse' => \$o_inverse,
'a' => \$o_admin,  'admin'  => \$o_admin,
'r' => \$o_noreg,  'noregexp' => \$o_noreg,
'V' => \$o_version,  'version' => \$o_version,
'f'     => \$o_perf,            'perfparse'     => \$o_perf,
'e'     => \$o_perfe,           'error'      => \$o_perfe,
'k'     => \$o_checkperf,       'perfcheck'    => \$o_checkperf,
'q'     => \$o_ext_checkperf,   'extperfcheck'  => \$o_ext_checkperf,
'w:s'   => \$o_warn_opt,        'warning:s'    => \$o_warn_opt,
'c:s'   => \$o_crit_opt,       'critical:s'    => \$o_crit_opt,
'B'     => \$o_kbits,   'kbits'  => \$o_kbits,  
's:i'   => \$o_short,       'short:i'    => \$o_short,
'g'    => \$o_highperf,       '64bits'    => \$o_highperf,
'S'    => \$o_perfs,       'intspeed'    => \$o_perfs,
'y'    => \$o_perfp,       'perfprct'    => \$o_perfp,
'Y'    => \$o_perfr,       'perfspeed'    => \$o_perfr,
'M'    => \$o_meg,       'mega'    => \$o_meg,
'G'    => \$o_gig,       'giga'    => \$o_gig,
'u'    => \$o_prct,       'prct'    => \$o_prct,
'o:i'   => \$o_octetlength,     'octetlength:i' => \$o_octetlength,
'label'   => \$o_label,     
'd:i'   => \$o_delta,           'delta:i'      => \$o_delta,
'D'   => \$o_dormant,           'dormant'             => \$o_dormant
);
if (defined ($o_help) ) { help(); exit $ERRORS{"UNKNOWN"}};
if (defined($o_version)) { p_version(); exit $ERRORS{"UNKNOWN"}};
if ( ! defined($o_descr) ||  ! defined($o_host) ) # check host and filter
{ print_usage(); exit $ERRORS{"UNKNOWN"}}
# check snmp information
if ( !defined($o_community) && (!defined($o_login) || !defined($o_passwd)) )
{ print "Put snmp login info!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if ((defined($o_login) || defined($o_passwd)) && (defined($o_community) || defined($o_version2)) )
{ print "Can't mix snmp v1,2c,3 protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (defined ($v3protocols)) {
if (!defined($o_login)) { print "Put snmp V3 login info with protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
my @v3proto=split(/,/,$v3protocols);
if ((defined ($v3proto[0])) && ($v3proto[0] ne "")) {$o_authproto=$v3proto[0]; } # Auth protocol
if (defined ($v3proto[1])) {$o_privproto=$v3proto[1]; } # Priv  protocol
if ((defined ($v3proto[1])) && (!defined($o_privpass))) {
print "Put snmp V3 priv login info with priv protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
}
if (defined($o_timeout) && (isnnum($o_timeout) || ($o_timeout < 2) || ($o_timeout > 60)))
{ print "Timeout must be >1 and <60 !\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (!defined($o_timeout)) {$o_timeout=5;}
# Check snmpv2c or v3 with 64 bit counters
if ( defined ($o_highperf) && (!defined($o_version2) && defined($o_community)))
{ print "Can't get 64 bit counters with snmp version 1\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (defined ($o_highperf)) {
if (eval "require bigint") {
use bigint;
} else  { print "Need bigint module for 64 bit counters\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
}

# check if -e without -f
if ( defined($o_perfe) && !defined($o_perf))
{ print "Cannot output error without -f option!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}  
if (defined ($o_perfr) && defined($o_perfp) )  {
print "-Y and -y options are exclusives\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if ((defined ($o_perfr) || defined($o_perfp) ) && !defined($o_checkperf))  {
print "Cannot put -Y or -y options without perf check option (-k) \n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (defined ($o_short)) {
#TODO maybe some basic tests ? caracters return empty string
}
if (defined ($o_checkperf)) {
@o_warn=split(/,/,$o_warn_opt);
if (defined($o_ext_checkperf) && ($#o_warn != 5)) {
print "6 warning levels for extended checks \n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
if (!defined($o_ext_checkperf) &&($#o_warn !=1 )){
print "2 warning levels for bandwidth checks \n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
@o_crit=split(/,/,$o_crit_opt);
#verb(" $o_crit_opt :: $#o_crit : @o_crit");
if (defined($o_ext_checkperf) && ($#o_crit != 5)) {
print "6 critical levels for extended checks \n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
if (!defined($o_ext_checkperf) && ($#o_crit !=1 )) {
print "2 critical levels for bandwidth checks \n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
for (my $i=0;$i<=$#o_warn;$i++) {
if (($o_crit[$i]!=0)&&($o_warn[$i] > $o_crit[$i])) {
print "Warning must be < Critical level \n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
}
if ((defined ($o_meg) && defined($o_gig) ) || (defined ($o_meg) && defined($o_prct) )|| (defined ($o_gig) && defined($o_prct) )) {
print "-M -G and -u options are exclusives\n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
}
#### octet length checks
if (defined ($o_octetlength) && (isnnum($o_octetlength) || $o_octetlength > 65535 || $o_octetlength < 484 )) {
print "octet lenght must be < 65535 and > 484\n";print_usage(); exit $ERRORS{"UNKNOWN"};
} 
}

########## MAIN #######

check_options();

# Check gobal timeout if snmp screws up
if (defined($TIMEOUT)) {
verb("Alarm at $TIMEOUT + 5");
alarm($TIMEOUT+5);
} else {
verb("no timeout defined : $o_timeout + 10");
alarm ($o_timeout+10);
}

$SIG{'ALRM'} = sub {
print "No answer from host\n";
exit $ERRORS{"UNKNOWN"};
};

# Connect to host
my ($session,$error);
if ( defined($o_login) && defined($o_passwd)) {
# SNMPv3 login
if (!defined ($o_privpass)) {
verb("SNMPv3 AuthNoPriv login : $o_login, $o_authproto");
($session, $error) = Net::SNMP->session(
-hostname    => $o_host,
-version  => '3',
-port       => $o_port,
-username  => $o_login,
-authpassword => $o_passwd,
-authprotocol => $o_authproto,
-timeout          => $o_timeout
); 
} else {
verb("SNMPv3 AuthPriv login : $o_login, $o_authproto, $o_privproto");
($session, $error) = Net::SNMP->session(
-hostname    => $o_host,
-version  => '3',
-username  => $o_login,
-port       => $o_port,
-authpassword => $o_passwd,
-authprotocol => $o_authproto,
-privpassword => $o_privpass,
-privprotocol => $o_privproto,
-timeout          => $o_timeout
);
}
} else {
if (defined ($o_version2)) {
# SNMPv2c Login
verb("SNMP v2c login");
($session, $error) = Net::SNMP->session(
-hostname  => $o_host,
-version   => 2,
-community => $o_community,
-port      => $o_port,
-timeout   => $o_timeout
);
} else {
# SNMPV1 login
verb("SNMP v1 login");
($session, $error) = Net::SNMP->session(
-hostname  => $o_host,
-community => $o_community,
-port      => $o_port,
-timeout   => $o_timeout
);
}
}
if (!defined($session)) {
printf("ERROR opening session: %s.\n", $error);
exit $ERRORS{"UNKNOWN"};
}

if (defined($o_octetlength)) {
my $oct_resultat=undef;
my $oct_test= $session->max_msg_size();
verb(" actual max octets:: $oct_test");
$oct_resultat = $session->max_msg_size($o_octetlength);
if (!defined($oct_resultat)) {
printf("ERROR: Session settings : %s.\n", $session->error);
$session->close;
exit $ERRORS{"UNKNOWN"};
}
$oct_test= $session->max_msg_size();
verb(" new max octets:: $oct_test");
}

# Get desctiption table
my $resultat = $session->get_table(
Baseoid => $descr_table
);

if (!defined($resultat)) {
printf("ERROR: Description table : %s.\n", $session->error);
$session->close;
exit $ERRORS{"UNKNOWN"};
}
my @tindex = undef;
my @oids = undef;
my @descr = undef;
my (@oid_perf,@oid_perf_outoct,@oid_perf_inoct,@oid_perf_inerr,@oid_perf_outerr,@oid_perf_indisc,@oid_perf_outdisc)=
(undef,undef,undef,undef,undef,undef,undef);
my @oid_speed=undef;
my @oid_speed_high=undef;
my $num_int = 0;

# Change to 64 bit counters if option is set :
if (defined($o_highperf)) {
$out_octet_table=$out_octet_table_64;
$in_octet_table=$in_octet_table_64;
}

# Select interface by regexp of exact match
# and put the oid to query in an array

verb("Filter : $o_descr");
foreach my $key ( keys %$resultat) {
verb("OID : $key, Desc : $$resultat{$key}");
# test by regexp or exact match
my $test = defined($o_noreg)
? $$resultat{$key} eq $o_descr
: $$resultat{$key} =~ /$o_descr/;
if ($test) {
# get the index number of the interface
my @oid_list = split (/\./,$key);
$tindex[$num_int] = pop (@oid_list);
# get the full description
$descr[$num_int]=$$resultat{$key};
# Get rid of special caracters (specially for Windows)
$descr[$num_int] =~ s/[[:cntrl:]]//g;
# put the admin or oper oid in an array
$oids[$num_int]= defined ($o_admin) ? $admin_table . $tindex[$num_int]
: $oper_table . $tindex[$num_int] ;
# Put the performance oid
if (defined($o_perf) || defined($o_checkperf)) {
$oid_perf_inoct[$num_int]= $in_octet_table . $tindex[$num_int];
$oid_perf_outoct[$num_int]= $out_octet_table . $tindex[$num_int];
$oid_speed[$num_int]=$speed_table . $tindex[$num_int];
$oid_speed_high[$num_int]=$speed_table_64 . $tindex[$num_int];
if (defined($o_ext_checkperf) || defined($o_perfe)) {
$oid_perf_indisc[$num_int]= $in_discard_table . $tindex[$num_int];
$oid_perf_outdisc[$num_int]= $out_discard_table . $tindex[$num_int];
$oid_perf_inerr[$num_int]= $in_error_table . $tindex[$num_int];
$oid_perf_outerr[$num_int]= $out_error_table . $tindex[$num_int];
}
}
verb("Name : $descr[$num_int], Index : $tindex[$num_int]");
$num_int++;
}
}
# No interface found -> error
if ( $num_int == 0 ) { print "ERROR : Unknown interface $o_descr\n" ; exit $ERRORS{"UNKNOWN"};}

my $result=undef;
# Add performance oids if requested
if (defined($o_perf)||defined($o_checkperf)) {
@oids=(@oids,@oid_perf_outoct,@oid_perf_inoct,@oid_speed);
if (defined($o_highperf)) {
@oids=(@oids,@oid_speed_high);
}  
if (defined ($o_ext_checkperf) || defined($o_perfe)) {
@oids=(@oids,@oid_perf_inerr,@oid_perf_outerr,@oid_perf_indisc,@oid_perf_outdisc);
}
}

# Get the requested oid values
$result = $session->get_request(
Varbindlist => \@oids
);
if (!defined($result)) { printf("ERROR: Status/statistics table : %s.\n", $session->error); $session->close;
exit $ERRORS{"UNKNOWN"};
}

$session->close;

my $num_ok=0;
my @checkperf_out=undef;
my @checkperf_out_raw=undef;
### Bandwidth test variables
my $temp_file_name;
my ($return,@file_values)=(undef,undef);
my $n_rows=0;
my $n_items_check=(defined($o_ext_checkperf))?7:3;
my $timenow=time;
my $trigger=$timenow - ($o_delta - ($o_delta/10));
my $trigger_low=$timenow - 3*$o_delta;
my ($old_value,$old_time)=undef;
my $speed_unit=undef;
my $speed_real=undef; # speed of interface using either standard or highperf mib.

# define the OK value depending on -i option
my $ok_val= defined ($o_inverse) ? 2 : 1;
my $final_status = 0;
my ($print_out,$perf_out)=(undef,undef);

# make all checks and output for all interfaces
for (my $i=0;$i < $num_int; $i++) {
$print_out.=", " if (defined($print_out));
$perf_out .= " " if (defined ($perf_out)) ;
my $usable_data=1;
# Get the status of the current interface
my $int_status= defined ($o_admin) ? $$result{$admin_table . $tindex[$i]}
:  $$result{ $oper_table . $tindex[$i] };

# Make the bandwith & error checks if necessary
if (defined ($o_checkperf) && $int_status==1) {
$temp_file_name=$descr[$i];
$temp_file_name =~ s/[ ;\/]/_/g;
$temp_file_name = $o_base_dir . $o_host ."." . $temp_file_name;
# First, read entire file
my @ret_array=read_file($temp_file_name,$n_items_check);
$return = shift(@ret_array);
$n_rows = shift(@ret_array);
if ($n_rows != 0) { @file_values = @ret_array };    
verb ("File read returns : $return with $n_rows rows");
# Get the speed in normal or highperf speed counters
if ($$result{$oid_speed[$i]} == 4294967295) { # Too high for this counter (cf IF-MIB)
if (! defined($o_highperf) && (defined($o_prct) || defined ($o_perfs) || defined ($o_perfp))) {
print "Cannot get interface speed with standard MIB, use highperf mib (-g) : UNKNOWN\n";
exit $ERRORS{"UNKNOWN"}
}
if (defined ($$result{$oid_speed_high[$i]}) && $$result{$oid_speed_high[$i]} != 0) {
$speed_real=$$result{$oid_speed_high[$i]} * 1000000;
} else {
print "Cannot get interface speed using highperf mib : UNKNOWN\n";
exit $ERRORS{"UNKNOWN"}
}
} else {
$speed_real=$$result{$oid_speed[$i]};
}
verb ("Interface speed : $speed_real");
#make the checks if the file is OK 
if ($return ==0) {
my $j=$n_rows-1;
@checkperf_out=undef;
@checkperf_out_raw=undef;
do {
if ($file_values[$j][0] < $trigger) {
if ($file_values[$j][0] > $trigger_low) {
# Define the speed metric ( K | M | G ) (Bits|Bytes) or %
my $speed_metric=undef;
if (defined($o_prct)) { # in % of speed
# Speed is in bits/s, calculated speed is in Bytes/s
$speed_metric=$speed_real/800;
$speed_unit="%";
} else {
if (defined($o_kbits)) { # metric in bits
if (defined($o_meg)) { # in Mbit/s = 1000000 bit/s
$speed_metric=125000; #  (1000/8) * 1000
$speed_unit="Mbps";
} elsif (defined($o_gig)) { # in Gbit/s = 1000000000 bit/s
$speed_metric=125000000; #  (1000/8) * 1000 * 1000
$speed_unit="Gbps";
} else { # in Kbits
$speed_metric=125; #  ( 1000/8 )
$speed_unit="Kbps";
}
} else { # metric in byte
if (defined($o_meg)) { # in Mbits
$speed_metric=1048576; # 1024^2
$speed_unit="MBps";
} elsif (defined($o_gig)) { # in Mbits
$speed_metric=1073741824; # 1024^3
$speed_unit="GBps";
} else {
$speed_metric=1024; # 1024^3
$speed_unit="KBps";
}     
}
}
# check if the counter is back to 0 after 2^32 / 2^64.
# First set the modulus depending on highperf counters or not
my $overfl_mod = defined ($o_highperf) ? 18446744073709551616 : 4294967296;
# Check counter (s)
my $overfl = ($$result{$oid_perf_inoct[$i]} >= $file_values[$j][1] ) ? 0 : $overfl_mod;
$checkperf_out_raw[0] = ( ($overfl + $$result{$oid_perf_inoct[$i]} - $file_values[$j][1])/
($timenow - $file_values[$j][0] ));
$checkperf_out[0] = $checkperf_out_raw[0] / $speed_metric;

$overfl = ($$result{$oid_perf_outoct[$i]} >= $file_values[$j][2] ) ? 0 : $overfl_mod;
$checkperf_out_raw[1] = ( ($overfl + $$result{$oid_perf_outoct[$i]} - $file_values[$j][2])/
($timenow - $file_values[$j][0] ));
$checkperf_out[1] = $checkperf_out_raw[1] / $speed_metric;

if (defined($o_ext_checkperf)) {
$checkperf_out[2] = ( ($$result{$oid_perf_inerr[$i]} - $file_values[$j][3])/
($timenow - $file_values[$j][0] ))*60;
$checkperf_out[3] = ( ($$result{$oid_perf_outerr[$i]} - $file_values[$j][4])/
($timenow - $file_values[$j][0] ))*60;
$checkperf_out[4] = ( ($$result{$oid_perf_indisc[$i]} - $file_values[$j][5])/
($timenow - $file_values[$j][0] ))*60;
$checkperf_out[5] = ( ($$result{$oid_perf_outdisc[$i]} - $file_values[$j][6])/
($timenow - $file_values[$j][0] ))*60;
}
}
}
$j--;
} while ( ($j>=0) && (!defined($checkperf_out[0])) );
}
# Put the new values in the array and write the file
$file_values[$n_rows][0]=$timenow;
$file_values[$n_rows][1]=$$result{$oid_perf_inoct[$i]};
$file_values[$n_rows][2]=$$result{$oid_perf_outoct[$i]};
if (defined($o_ext_checkperf)) { # Add other values (error & disc)
$file_values[$n_rows][3]=$$result{$oid_perf_inerr[$i]};
$file_values[$n_rows][4]=$$result{$oid_perf_outerr[$i]};
$file_values[$n_rows][5]=$$result{$oid_perf_indisc[$i]};
$file_values[$n_rows][6]=$$result{$oid_perf_outdisc[$i]};
}
$n_rows++;
$return=write_file($temp_file_name,$n_rows,$n_items_check,@file_values);
verb ("Write file returned : $return");
# Print the basic status
if (defined ($o_short)) {
my $short_desc=undef;
if ($o_short < 0) {$short_desc=substr($descr[$i],$o_short);}
else {$short_desc=substr($descr[$i],0,$o_short);}
$print_out.=sprintf("%s:%s",$short_desc, $status{$int_status} );
} else {
$print_out.=sprintf("%s:%s",$descr[$i], $status{$int_status} );
}
if ($return !=0) { # On error writing, return Unknown status
$final_status=3;
$print_out.= " !!Unable to write file ".$temp_file_name." !! ";
}
# print the other checks if it was calculated
if (defined($checkperf_out[0])) {
$print_out.= " (";
# check 2 or 6 values depending on ext_check_perf
my $num_checkperf=(defined($o_ext_checkperf))?6:2;
for (my $l=0;$l < $num_checkperf;$l++) {
# Set labels if needed
$checkperf_out_desc= (defined($o_label)) ? $countername[$l] : "";
verb("Interface $i, check $l : $checkperf_out[$l]");
if ($l!=0) {$print_out.="/";}
if (($o_crit[$l]!=0) && ($checkperf_out[$l]>$o_crit[$l])) {
$final_status=2;
$print_out.= sprintf("CRIT %s%.1f",$checkperf_out_desc,$checkperf_out[$l]);
} elsif (($o_warn[$l]!=0) && ($checkperf_out[$l]>$o_warn[$l])) {
$final_status=($final_status==2)?2:1;
$print_out.= sprintf("WARN %s%.1f",$checkperf_out_desc,$checkperf_out[$l]);
} else {
$print_out.= sprintf("%s%.1f",$checkperf_out_desc,$checkperf_out[$l]);
}
if ( $l==0 || $l == 1) { $print_out.= $speed_unit; }
}
$print_out .= ")";
} else { # Return unknown when no data
$print_out.= " No usable data on file (".$n_rows." rows) ";
$final_status=3;$usable_data=0;
}
} else {
if (defined ($o_short)) {
my $short_desc=undef;
if ($o_short < 0) {$short_desc=substr($descr[$i],$o_short);}
else {$short_desc=substr($descr[$i],0,$o_short);}
$print_out.=sprintf("%s:%s",$short_desc, $status{$int_status} );
} else {
$print_out.=sprintf("%s:%s",$descr[$i], $status{$int_status} );
}
}
# Get rid of special caracters for performance in description
$descr[$i] =~ s/'\/\(\)/_/g;
if (( $int_status == $ok_val)||(defined($o_dormant) && $int_status == 5)) {
$num_ok++;
}
if (( $int_status == 1 ) && defined ($o_perf)) {
if (defined ($o_perfp)) { # output in % of speed
if ($usable_data==1) {
my $warn_factor=1;
if (!defined($o_prct)) { # warn&crit in K|M|G B|bps -> put warn_factor to make %
$warn_factor = (defined($o_meg)) ? 1000000 : (defined($o_gig)) ? 1000000000 : 1000;
if (!defined($o_kbits)) { $warn_factor*=8;}
$warn_factor/=$speed_real;
$warn_factor*=100; # now turn into displayed % : 0,1 = 10%
}
$perf_out .= "'" . $descr[$i] ."_in_prct'=";
$perf_out .= sprintf("%.0f",$checkperf_out_raw[0] * 800 / $speed_real) ."%;";
$perf_out .= ($o_warn[0]!=0) ? sprintf("%.0f",$o_warn[0]*$warn_factor) . ";" : ";";
$perf_out .= ($o_crit[0]!=0) ? sprintf("%.0f",$o_crit[0]*$warn_factor) . ";" : ";";
$perf_out .= "0;100 ";
$perf_out .= "'" . $descr[$i] ."_out_prct'=";
$perf_out .= sprintf("%.0f",$checkperf_out_raw[1] * 800 / $speed_real) ."%;";
$perf_out .= ($o_warn[1]!=0) ? sprintf("%.0f",$o_warn[1]*$warn_factor) . ";" : ";";
$perf_out .= ($o_crit[1]!=0) ? sprintf("%.0f",$o_crit[1]*$warn_factor) . ";" : ";";
$perf_out .= "0;100 ";
}
} elsif (defined ($o_perfr)) { # output in bites or Bytes /s
if ($usable_data==1) {
if (defined($o_kbits)) { # bps
# put warning and critical levels into bps or Bps
my $warn_factor;
if (defined($o_prct)) { # warn&crit in % -> put warn_factor to 1% of speed in bps
$warn_factor=$speed_real/100;
} else { # just convert from K|M|G bps
$warn_factor = (defined($o_meg)) ? 1000000 : (defined($o_gig)) ? 1000000000 : 1000;
}
$perf_out .= "'" . $descr[$i] ."_in_bps'=";
$perf_out .= sprintf("%.0f",$checkperf_out_raw[0] * 8) .";";
$perf_out .= ($o_warn[0]!=0) ? $o_warn[0]*$warn_factor . ";" : ";";
$perf_out .= ($o_crit[0]!=0) ? $o_crit[0]*$warn_factor . ";" : ";";
$perf_out .= "0;". $speed_real ." ";   
$perf_out .= "'" . $descr[$i] ."_out_bps'=";
$perf_out .= sprintf("%.0f",$checkperf_out_raw[1] * 8) .";";
$perf_out .= ($o_warn[1]!=0) ? $o_warn[1]*$warn_factor . ";" : ";";
$perf_out .= ($o_crit[1]!=0) ? $o_crit[1]*$warn_factor . ";" : ";";
$perf_out .= "0;". $speed_real ." ";       
} else { # Bps
my $warn_factor;
if (defined($o_prct)) { # warn&crit in % -> put warn_factor to 1% of speed in Bps
$warn_factor=$speed_real/800;
} else { # just convert from K|M|G bps
$warn_factor = (defined($o_meg)) ? 1048576 : (defined($o_gig)) ? 1073741824 : 1024;
}
$perf_out .= "'" . $descr[$i] ."_in_Bps'=" . sprintf("%.0f",$checkperf_out_raw[0]) .";";
$perf_out .= ($o_warn[0]!=0) ? $o_warn[0]*$warn_factor . ";" : ";";
$perf_out .= ($o_crit[0]!=0) ? $o_crit[0]*$warn_factor . ";" : ";";
$perf_out .= "0;". $speed_real / 8 ." ";      
$perf_out .= "'" . $descr[$i] ."_out_Bps'=" . sprintf("%.0f",$checkperf_out_raw[1]) .";" ;
$perf_out .= ($o_warn[1]!=0) ? $o_warn[1]*$warn_factor . ";" : ";";
$perf_out .= ($o_crit[1]!=0) ? $o_crit[1]*$warn_factor . ";" : ";";
$perf_out .= "0;". $speed_real / 8 ." ";   
}
}
} else { # output in octet counter
$perf_out .= "'" . $descr[$i] ."_in_octet'=". $$result{$oid_perf_inoct[$i]} ."c "; 
$perf_out .= "'" . $descr[$i] ."_out_octet'=". $$result{$oid_perf_outoct[$i]} ."c "; 
}
if (defined ($o_perfe)) {
$perf_out .= "'" . $descr[$i] ."_in_error'=". $$result{$oid_perf_inerr[$i]} ."c ";
$perf_out .= "'" . $descr[$i] ."_in_discard'=". $$result{$oid_perf_indisc[$i]} ."c ";
$perf_out .= "'" . $descr[$i] ."_out_error'=". $$result{$oid_perf_outerr[$i]} ."c ";
$perf_out .= "'" . $descr[$i] ."_out_discard'=". $$result{$oid_perf_outdisc[$i]} ."c ";
}
if (defined ($o_perfs)) {
$perf_out .= "'" . $descr[$i] ."_speed_bps'=".$speed_real;
}
}
}

# Only a few ms left...
alarm(0);

# Check if all interface are OK
if ($num_ok == $num_int) {
if ($final_status==0) {
print $print_out,":", $num_ok, " UP: OK";
if (defined ($o_perf)) { print " | ",$perf_out; }
print "\n";
exit $ERRORS{"OK"};
} elsif ($final_status==1) {
print $print_out,":(", $num_ok, " UP): WARNING";
if (defined ($o_perf)) { print " | ",$perf_out; }
print "\n";
exit $ERRORS{"WARNING"};
} elsif ($final_status==2) {
print $print_out,":(", $num_ok, " UP): CRITICAL";
if (defined ($o_perf)) { print " | ",$perf_out; }
print "\n";
exit $ERRORS{"CRITICAL"};
} else {
print $print_out,":(", $num_ok, " UP): UNKNOWN";
if (defined ($perf_out)) { print " | ",$perf_out; }
print "\n";
exit $ERRORS{"UNKNOWN"};   
}
}

# else print the not OK interface number and exit (return is always critical if at least one int is down).

print $print_out,": ", $num_int-$num_ok, " int NOK : CRITICAL";
if (defined ($perf_out)) { print " | ",$perf_out; }
print "\n";
exit $ERRORS{"CRITICAL"};