#!/bin/sh
#
#
# Univention Nagios Plugin
#  check_univention_nmbd: check nmbd status
#
# Like what you see? Join us!
# https://www.univention.com/about-us/careers/vacancies/
#
# Copyright 2007-2024 Univention GmbH
#
# https://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <https://www.gnu.org/licenses/>.
#
#

VERSION="1.00"
PROGNAME=`/usr/bin/basename $0`
VERBOSE=0

STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

get_state_string() {
	if [ "$1" = "$STATE_OK" ] ; then
		STATE_STRING="OK"
	elif [ "$1" = "$STATE_WARNING" ] ; then
		STATE_STRING="WARNING"
	elif [ "$1" = "$STATE_CRITICAL" ] ; then
		STATE_STRING="CRITICAL"
	else
		STATE_STRING="UNKNOWN"
    fi
}

print_revision() {
    echo "$PROGNAME: version $VERSION"
}

print_usage() {
    echo "Usage: $PROGNAME --help"
    echo "Usage: $PROGNAME --version"
    echo "Usage: $PROGNAME [-W <WINS server>] [-N <NetBIOS name>]"
}

print_help() {
    print_revision
    echo ""
    print_usage
}

QUERY_HOST="$(/bin/hostname)"
WINS_HOST="$(/bin/hostname)"
while test -n "$1"; do
    case "$1" in
        --help)
            print_help
            exit $STATE_OK
            ;;
        -h)
            print_help
            exit $STATE_OK
            ;;
        --version)
            print_revision
            exit $STATE_OK
            ;;
        -V)
            print_revision
            exit $STATE_OK
            ;;
		-W)
			WINS_HOST="$2"
			shift
			;;
		-N)
			QUERY_HOST="$2"
			shift
			;;
    esac
    shift
done



CMD=$(which nmblookup)
if [ -z "$CMD" ] ; then
	echo "Cannot find nmblookup executable"
	exit $STATE_UNKNOWN
fi

output=$($CMD -U "$WINS_HOST" --recursion "$QUERY_HOST" 2> /dev/null)
msg=$(echo "$output" | tr '\n' ';')

echo "$output" | grep -qc "failed to find name"
if [ $? = 0 ]; then
	state=$STATE_CRITICAL
	get_state_string $state
	echo "${STATE_STRING}: nmblookup for $QUERY_HOST failed: $msg"
	exit $state
fi

echo "$output" | egrep -q "[0-9]+.[0-9]+.[0-9]+.[0-9]+ $QUERY_HOST"
if [ $? = 0 ]; then
	state=$STATE_OK
	get_state_string $state
	echo "${STATE_STRING}: nmblookup for $QUERY_HOST ok"
	exit $state
fi


state=$STATE_CRITICAL
get_state_string $state
echo "${STATE_STRING}: PLUGIN FAILED: unknown nmblookup output: $msg"
exit $state
