diff --git a/check_bird2_oneshot b/check_bird2_oneshot
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+++ b/check_bird2_oneshot
@@ -0,0 +1,179 @@
+#!/bin/sh
+
+# Copyright 2019 alarig <alarig@grifon.fr>
+#
+# BSD-3-Clause licence
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors
+# may be used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+# For debuggin purpose, uncomment the next line and `tail -F` the file.
+#exec 2> /tmp/check_bgp.log
+
+# This scipt works with bird2 only
+
+CONF_IGNORE_FILE="/usr/local/etc/nrpe-bird/ignore.cfg"
+
+usage() {
+	printf "Usage:\n"
+	printf "Must be run with user account able to use birdc/birdc6 or "
+	printf "specify -s to use birdc with sudo.\n"
+	printf "To ignore sessions, put one per line in ${CONF_IGNORE_FILE}.\n"
+}
+
+args=$(getopt hs $*)
+
+if [ $? -ne 0 ]; then
+	usage
+	exit 3
+fi
+set -- $args
+
+while :; do
+	case "$1" in
+		-h)
+			usage
+			exit 0
+			shift;;
+		-s)
+			SUDO='sudo'
+			shift;;
+		--)
+			shift;
+			break;;
+	esac
+done
+
+test_route_limit() {
+	if [ "${ROUTE_HIT_IN}" != "" ]; then
+		printf "${protocol} has hit import route " >> \
+			${DIR}/CRITICAL.txt
+		printf "limit\n" >> ${DIR}/CRITICAL.txt
+	elif [ "${ROUTE_HIT_OUT}" != "" ]; then
+		printf "${protocol} has hit export route " >> \
+			${DIR}/CRITICAL.txt
+		printf "limit\n" >> ${DIR}/CRITICAL.txt
+	elif [ ${RATIO_IN} -gt 92 ]; then
+		printf "${protocol} import route limit is " >> \
+			${DIR}/WARNING.txt
+		printf "over threshold\n" >> ${DIR}/WARNING.txt
+	fi
+}
+
+# path expansion for birdc and sudo of FreeBSD
+PATH="$PATH:/usr/local/sbin/:/usr/local/bin/"
+
+DIR="$(mktemp -d '/tmp/nrpe-bird.XXXX')"
+
+#$birdc 'show protocols' | awk '$2 ~ "BGP" && $4 !~ "down" { print $0 }' > \
+#	${DIR}/bgp_protocols_up.txt
+
+# The sed removes the first two lines (BIRD 2.0.2 ready and Name Proto blah)
+birdc 'show protocols all' | sed '1,2d;$d' | \
+	awk -v RS= -v DIR=$DIR '{print > (DIR "/" $1 ".txt")}'
+
+for protocol in $(cat ${CONF_IGNORE_FILE}); do
+	rm "${DIR}/${protocol}.txt"
+done
+
+for protocol in $(find ${DIR} -type f); do
+	protocol_name=$(echo ${protocol} | cut -d / -f 4 | cut -d . -f 1)
+	STATE="$(head -n 1 ${protocol} | awk '{ print $6 }')"
+	ROUTE_LIMIT_IN="$(awk '/Import limit/ { print $3 }' ${protocol})"
+	ROUTES_IMPORTED="$(grep 'Routes:' ${protocol} | \
+		sed -Ee '/imported/{ s/^.* ([0-9]+) imported.*$/\1/; p;}' -e d)"
+	ROUTE_HIT_IN="$(grep -E 'Receive limit:.*HIT' ${protocol})"
+
+	if [ -z ${ROUTE_LIMIT_IN} ]; then
+		# There is no import limit, so no ratio either
+		RATIO_IN=0
+	else
+		RATIO_IN=$(echo "(${ROUTES_IMPORTED}*100)/${ROUTE_LIMIT_IN}" \
+			| bc)
+	fi
+
+	ROUTE_HIT_OUT="$(grep -E 'Export limit:.*HIT' ${protocol})"
+
+	# Plugin return codes:
+	# https://nagios-plugins.org/doc/guidelines.html#AEN78
+	case ${STATE} in
+		# BGP
+		# Session states:
+		# https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/bgp/bgp.h#L601
+		Established)
+			test_route_limit
+			;;
+		OpenSent | OpenConfirm)
+			printf "${protocol} is in ${STATE} state\n" >> \
+				${DIR}/WARNING.txt
+			;;
+		Idle | Connect | Active)
+			printf "CRITICAL: ${protocol} is in ${STATE} state\n" \
+				>> ${DIR}/CRITICAL.txt
+			;;
+
+		# OSPF
+		# https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/ospf/ospf.c#L532
+		Running)
+			test_route_limit
+			;;
+		Alone)
+			printf "${protocol} is in ${STATE} state\n" >> \
+				${DIR}/WARNING.txt
+			exit 1
+			;;
+
+		# Or what	
+		*)
+			if [ -z ${STATE} ]; then
+				printf "Empty state for ${protocol_name}\n" \
+					>> ${DIR}/UNKNOWN.txt
+			else
+				printf "Unknown state ${STATE} for " >> \
+					${DIR}/UNKNOWN.txt
+				printf "${protocol}\n" >> ${DIR}/UNKNOWN.txt
+			fi
+			;;
+	esac
+done
+
+if [ -f ${DIR}/CRITICAL.txt ]; then
+	printf "CRITICAL: $(cat ${DIR}/CRITICAL.txt)\n"
+	rm -r ${DIR}
+	exit 2
+elif [ -f ${DIR}/WARNING.txt ]; then
+	printf "WARNING: $(cat ${DIR}/WARNING.txt)\n"
+	rm -r ${DIR}
+	exit 1
+elif [ -f ${DIR}/UNKNOWN.txt ]; then
+	printf "UNKNOWN: $(cat ${DIR}/UNKNOWN.txt)\n"
+	rm -r ${DIR}
+	exit 3
+else
+	printf "OK: This is fine\n"
+	rm -r ${DIR}
+	exit 0
+fi