Matejunkie

user@host ~ $ svn co https://svn.matejunkie.com/svn/nagios-plugins/stable/check_udp-packet-loss/ check_udp-packet-loss/

#!/bin/sh
 
#   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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
PROGNAME=`basename $0`
VERSION="Version 1.0,"
AUTHOR="2009, Mike Adolphs (http://www.matejunkie.com/)"
 
ST_OK=0
ST_WR=1
ST_CR=2
ST_UK=3
 
path_tmp="/tmp"
 
print_version() {
    echo "$VERSION $AUTHOR"
}
 
print_help() {
    print_version $PROGNAME $VERSION
    echo ""
    echo "$PROGNAME is a Nagios plugin to monitor the UDP packet loss via"
    echo "netstat."
    echo ""
    echo "$PROGNAME check_udp-packet-loss.sh"
    echo ""
    echo "Options:"
    echo "  --warning|-w)"
    echo "    Sets a warning level for packet receive errors. Default is:"
    echo "    off"
    echo "  --critical|-c)"
    echo "    Sets a critical level for packet receive errors. Default is:"
    echo "    off"
    echo "  --path-tmp|-t)"
    echo "    Sets the path for the temporary file. Default is: /tmp"
    exit $ST_UK
}
 
while test -n "$1"; do
    case "$1" in
        --help|-h)
            print_help
            exit $ST_UK
            ;;
        --version|-v)
            print_version $PROGNAME $VERSION
            exit $ST_UK
            ;;
        --path-tmp|-t)
            path_tmp=$2
            shift
            ;;
        --warning|-w)
            warn=$2
            shift
            ;;
        --critical|-c)
            crit=$2
            shift
            ;;
        *)
            echo "Unknown argument: $1"
            print_help
            exit $ST_UK
            ;;
    esac
    shift
done
 
check_filesize() {
    if [ -f $path_tmp/check_udp-packet-errors.log ]
    then
        size=`du $path_tmp/check_udp-packet-errors.log | awk '{print $1}'`
	if [ $size -gt 32 ]
        then
            rm $path_tmp/check_udp-packet-errors.log
            touch $path_tmp/check_udp-packet-errors.log
        fi
    else
        touch $path_tmp/check_udp-packet-errors.log
    fi
}
 
check_packet_loss() {
    p_receive=`netstat -us|grep 'packets received'|awk '{print $1}'`
    echo "Received: $p_receive" >> $path_tmp/check_udp-packet-errors.log
    p_unknown=`netstat -us|grep 'to unknown port'|awk '{print $1}'`
    echo "Unknown: $p_unknown" >> $path_tmp/check_udp-packet-errors.log
    p_errors=`netstat -us|grep 'packet receive errors'|awk '{print $1}'`
    echo "Errors: $p_errors" >> $path_tmp/check_udp-packet-errors.log
}
 
val_wcdiff() {
    if [ ${warn} -gt ${crit} ]
    then
        wcdiff=1
    fi
}
 
check_filesize
check_packet_loss
 
if [ -n "$warn" -a -n "$crit" ]
then
    val_wcdiff
    if [ "$wcdiff" = 1 ]
    then
        echo "The warning level should be lower than the critical level. Please adjust them."
        exit $ST_UK
    fi
fi
 
if [ -n "$warn" -a -n "$crit" ]
then
    if [ "$p_unknown" -ge "$warn" -a "$p_unknown" -lt "$crit" ]
    then
        echo "WARNING - $p_receive total packets received, $p_unknown went to unknown port, $p_errors receive errors! | 'received'=$p_receive 'unknown_port'=$p_unknown 'errors'=$p_errors"
        exit $ST_WR
    elif [ "$p_unknown" -ge "$crit" ]
    then
        echo "CRITICAL - $p_receive total packets received, $p_unknown went to unknown port, $p_errors receive errors! | 'received'=$p_receive 'unknown_port'=$p_unknown 'errors'=$p_errors"
        exit $ST_CR
    else
        echo "OK - $p_receive total packets received, $p_unknown went to unknown port, $p_errors receive errors! | 'received'=$p_receive 'unknown_port'=$p_unknown 'errors'=$p_errors"
        exit $ST_OK
    fi
else
    echo "OK - $p_receive total packets received, $p_unknown went to unknown port, $p_errors receive errors! | 'received'=$p_receive 'unknown_port'=$p_unknown 'errors'=$p_errors"
    exit $ST_OK
fi