Verificar Qual Link Está ativo cfme rota - traceroute

verificaQualLink.sh

#!/bin/bash
# BASH version > 3 needed
#
# Based on Nagios plugin check_traceroute
#
#
# Requirements :
# Traceroute command
#
# Version 1.0 : 26/06/2019
# Initial release.
#
# Rafael Barzotto
#
################################################################################


PROGNAME="verificaQualLink"
AUTHOR="Rafael Barzotto"
VERSION="1.0"


print_usage() {
	echo $PROGNAME $VERSION by $AUTHOR
	echo "Usa-se:"
	echo "verificaQualLink TARGET NHOP ROUTE1 ROUTE2"
	echo " "
	echo "Exemplo:"
	echo "verificaQualLink 8.8.8.8 3 192.168.1.254 192.168.2.254"
	echo "8.8.8.8 - Destino do Traceroute"
	echo "3 - NHOP que se deve verificar"
	echo "192.168.1.254 - Qual IP deve ser o NHOP número 3, para definir se é o link principal que está ativo"
	echo "192.168.2.254 - Qual IP deve ser o NHOP número 3, para definir se é o link alternativo que está ativo"
}


if [ "$#" -lt 4 ]; then
	print_usage
	exit
fi



TARGET=$1
NHOP=$2
ROUTE1=$3
ROUTE2=$4
ERRCODE=3

TR_OPTS="-n"
[[ $DEFAULT_SOCKET_TIMEOUT =~ ^[0-9]+$ ]] && TR_OPTS+=" -w$DEFAULT_SOCKET_TIMEOUT"

if  ! [[ $NHOP =~ ^[0-9]+$ ]]; then
	print_usage
	exit
fi


TR_OPTS+=" -f$NHOP -m$NHOP $TARGET"

TR_OUTPUT=`traceroute $TR_OPTS 2>/dev/null`
if [ $? -ne 0 ]; then
	echo ERROR in traceroute command.
	exit
fi

TR_HOP=`echo "$TR_OUTPUT" | tail -n1 | sed 's/^ *//' | cut -f 3 -d " "`

case "$TR_HOP" in
        $ROUTE1)
				echo "ROTA OK, USANDO LINK PRINCIPAL! - Primary path in place: HOP $NHOP to $TARGET via $TR_HOP"
                exit
                ;;
        $ROUTE2)
				echo "ROTA FALHOU, USANDO LINK ALTERNATIVO! - Failover path in place: HOP $NHOP to $TARGET via $TR_HOP"
                exit
                ;;
        *)
				echo "Unexpected path in place: HOP $NHOP to $TARGET via $TR_HOP"
                exit
                ;;
esac