From 399ab2f3b8d6e6802f7f02d580cc5ad17515b1cf Mon Sep 17 00:00:00 2001
From: alarig <alarig@swordarmor.fr>
Date: Fri, 18 May 2018 11:33:03 +0200
Subject: [PATCH] Adding script

---
 check_bgp | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100755 check_bgp

diff --git a/check_bgp b/check_bgp
new file mode 100755
index 0000000..4784b30
--- /dev/null
+++ b/check_bgp
@@ -0,0 +1,119 @@
+#!/bin/sh
+
+# Copyright 2017 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
+
+usage() {
+	printf "Usage:\n"
+	printf "check_bgp [-4|-6] -p session\n"
+	printf "Must be run with user account able to use birdc/birdc6 or use"
+	printf "-s to use birdc with sudo.\n"
+}
+
+args=$(getopt 46hsp: $*)
+
+if [ $? -ne 0 ]; then
+	usage
+	exit 3
+fi
+set -- $args
+
+while :; do
+	case "$1" in
+		-h)
+			usage
+			exit 0
+			shift
+			;;
+		-4)
+			VERSION="IPv4"
+			shift
+			;;
+		-6)
+			VERSION="IPv6"
+			shift
+			;;
+		-s)
+			SUDO='sudo'
+			shift
+			;;
+		-p)
+			SESSION="$2"
+			shift; shift
+			;;
+		--)
+			shift; break
+			;;
+	esac
+done
+
+# path expansion for birdc and sudo of FreeBSD
+PATH="$PATH:/usr/local/sbin/:/usr/local/bin/"
+
+if [ "${VERSION}" = "IPv4" ]; then
+	birdc="${SUDO} birdc -r"
+elif [ "${VERSION}" = "IPv6" ]; then
+	birdc="${SUDO} birdc6 -r"
+else
+	printf "CRITICAL: Invalid IP version, use -4 for IPv4 and -6 for IPv6\n"
+	exit 2
+fi
+
+if [ -z ${SESSION} ]; then
+	printf "CRITICAL: No session name supplied, use -p \$session.\n"
+	exit 2
+fi
+
+STATE="$($birdc show protocol ${SESSION} | awk -v session=${SESSION} '$0 ~ session { print $6 }')"
+
+# Session states: https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/bgp/bgp.c#L1465
+# Plugin return codes: https://nagios-plugins.org/doc/guidelines.html#AEN78
+
+case ${STATE} in
+	Established)
+		printf "OK: ${SESSION} is ${STATE}\n"
+		exit 0
+		;;
+	OpenSent | OpenConfirm)
+		printf "WARNING: ${SESSION} is in ${STATE} state\n"
+		exit 1
+		;;
+	Idle | Connect | Active)
+		printf "CRITICAL: ${SESSION} is in ${STATE} state\n"
+		exit 2
+		;;
+	*)
+		printf "Unknown state: ${STATE}\n"
+		exit 3
+		;;
+esac