#! /usr/bin/perl -w
################################################################################
# Copyright 2004-2013 MERETHIS
# Centreon is developped by : Julien Mathis and Romain Le Merlus under
# GPL Licence 2.0.
# 
# 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.
# 
# 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, see <http://www.gnu.org/licenses>.
# 
# Linking this program statically or dynamically with other modules is making a 
# combined work based on this program. Thus, the terms and conditions of the GNU 
# General Public License cover the whole combination.
# 
# As a special exception, the copyright holders of this program give MERETHIS 
# permission to link this program with independent modules to produce an executable, 
# regardless of the license terms of these independent modules, and to copy and 
# distribute the resulting executable under terms of MERETHIS choice, provided that 
# MERETHIS also meet, for each linked independent module, the terms  and conditions 
# of the license of that module. An independent module is a module which is not 
# derived from this program. If you modify this program, you may extend this 
# exception to your version of the program, but you are not obliged to do so. If you
# do not wish to do so, delete this exception statement from your version.
# 
# For more information : contact@centreon.com
# 
# SVN : $URL$
# SVN : $Id$
#
####################################################################################
#
# Plugin init

use strict;
require "/DBA/nagios/nagios-plugins/1.latest/plugins/Centreon/SNMP/Utils.pm";

use vars qw($PROGNAME);
use Getopt::Long;
use vars qw($opt_h $opt_V $opt_p $opt_c $opt_w);

my %ERRORS = ('OK' => 0, 'WARNING' => 1, 'CRITICAL' => 2, 'UNKNOWN' => 3);

my $Revision = 1.2.1;

$PROGNAME = "ckeck_TcpConn";
sub print_help ();
sub print_usage ();

my %OPTION = (
    "host" => undef,
    "snmp-community" => "public", "snmp-version" => 1, "snmp-port" => 161, 
    "snmp-auth-key" => undef, "snmp-auth-user" => undef, "snmp-auth-password" => undef, "snmp-auth-protocol" => "MD5",
    "snmp-priv-key" => undef, "snmp-priv-password" => undef, "snmp-priv-protocol" => "DES",
    "maxrepetitions" => undef, "snmptimeout" => undef,
    "64-bits" => undef,
);

Getopt::Long::Configure('bundling');
GetOptions
    (
    "H|hostname|host=s"         => \$OPTION{'host'},
    "C|community=s"             => \$OPTION{'snmp-community'},
    "v|snmp|snmp-version=s"     => \$OPTION{'snmp-version'},
    "P|snmpport|snmp-port=i"    => \$OPTION{'snmp-port'},
    "u|username=s"              => \$OPTION{'snmp-auth-user'},
    "authpassword|password=s"   => \$OPTION{'snmp-auth-password'},
    "k|authkey=s"               => \$OPTION{'snmp-auth-key'},
    "authprotocol=s"            => \$OPTION{'snmp-auth-protocol'},
    "privpassword=s"            => \$OPTION{'snmp-priv-password'},
    "privkey=s"                 => \$OPTION{'snmp-priv-key'},
    "privprotocol=s"            => \$OPTION{'snmp-priv-protocol'},
    "maxrepetitions=s"          => \$OPTION{'maxrepetitions'},
    "snmp-timeout=i"            => \$OPTION{'snmptimeout'},
    "64-bits"                   => \$OPTION{'64-bits'},

    "h"     => \$opt_h, "help"      => \$opt_h,
    "V"     => \$opt_V, "version"   => \$opt_V,
    "p=i"   => \$opt_p, "port=s"    => \$opt_p,
    "c=s"   => \$opt_c, "w=s"       => \$opt_w
);

if ($opt_V) {
    print_revision($PROGNAME,'$Revision: 1.0');
    exit $ERRORS{'OK'};
}

if ($opt_h) {
    print_help();
    exit $ERRORS{'OK'};
}

my ($session_params) = Centreon::SNMP::Utils::check_snmp_options($ERRORS{'UNKNOWN'}, \%OPTION);

$opt_p = shift unless ($opt_p);
(print_usage() && exit $ERRORS{'OK'}) unless ($opt_p);

my $name = $0;
$name =~ s/\.pl.*//g;
my $day = 0;

#===  create a SNMP session ====
# 1.3.6.1.4.1.232.1.2.2.1.1.6
my $session = Centreon::SNMP::Utils::connection($ERRORS{'UNKNOWN'}, $session_params);

my $OID_TCP_PORT = ".1.3.6.1.2.1.6.13.1.3";

my $result = Centreon::SNMP::Utils::get_snmp_table($OID_TCP_PORT, $session, $ERRORS{'UNKNOWN'}, \%OPTION);

my $cpt = 0;
foreach my $key (oid_lex_sort(keys %$result)) {
    if ($result->{$key} == $opt_p) {
        $cpt++;
    }
}

if (!defined($opt_w)){$opt_w = 20;}
if (!defined($opt_c)){$opt_c = 30;}

print "Number of connections on port $opt_p :  $cpt |nb_conn=$cpt\n";
if ($cpt >= $opt_w && $cpt < $opt_c){
    exit $ERRORS{'WARNING'};
} elsif ($cpt >= $opt_c){
    exit $ERRORS{'CRITICAL'};
} else {
    exit $ERRORS{'OK'};
}

sub print_usage () {
    print "\nUsage:\n";
    print "$PROGNAME\n";
    print "   -H (--hostname)   Hostname to query (required)\n";
    print "   -C (--community)  SNMP read community (defaults to public)\n";
    print "                     used with SNMP v1 and v2c\n";
    print "   -v (--snmp-version)  1 for SNMP v1 (default)\n";
    print "                        2 for SNMP v2c\n";
    print "                        3 for SNMP v3\n";
    print "   -P (--snmp-port)  SNMP port (default: 161)\n";
    print "   -k (--authkey)    snmp V3 key\n";
    print "   -u (--username)   snmp V3 username \n";
    print "   --password        snmp V3 password\n";
    print "   --authprotocol    protocol MD5/SHA  (v3)\n";
    print "   --privprotocol    encryption system (DES/AES)(v3) \n";
    print "   --privpassword    passphrase (v3) \n";
    print "   --64-bits         Use 64 bits OID\n";
    print "   --maxrepetitions  To use when you have the error: 'Message size exceeded buffer maxMsgSize'\n";
    print "                     Work only with SNMP v2c and v3 (Example: --maxrepetitions=1)\n";
    print "   --snmp-timeout    SNMP Timeout\n";
    print "   -p (--port)       port you want to check - (required)\n";
    print "   -V (--version)    Plugin version\n";
    print "   -h (--help)       usage help\n";
}

sub print_help () {
    print "##############################################\n";
    print "#    Copyright (c) 2004-2013 Centreon        #\n";
    print "#    Bugs to http://forge.centreon.com/      #\n";
    print "##############################################\n";
    print_usage();
    print "\n";
}
