#!/bin/sh
# Description :
# This Plugin  checks a specific number of jump, in a traceroute command. 
# You can define one primary Route(Expected:OK status) and a Secondary 
# Route(Fallback: Warning status). If this number of Jump doesn't match any 
# of the above, it goes to critical status. 
#
# License : GPL
#
#  by	Karl Alexander Monzon.
#
# Requirements :
# Traceroute command and permisions.
#
# Version 1.0 : 07/01/2007 
# Initial release.
#
#
################################################################################

PROGNAME="check_route"
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
REVISION=`echo '$Revision: 1.0 $' | sed -e 's/[^0-9.]//g'`

# 
# Initalize a few variables
#
HOSTADDRESS=$1
NJUMP=$2
ROUTE1=$3
ROUTE2=$4
DEBUG=$5

OUTPUT=''
EXITCODE=3
ERRORMSG="There was a problem."

print_usage() {
        echo "Usage: $PROGNAME"
	echo "check_route [host ip] [jump][route 1] [route 2] <debug>"
	echo " "
	echo "Options:"
	echo "[host]: The name or IP address of the server to check."
	echo "[jump]: The number of jump to evaluate."
	echo "[route 1]: The IP address of the primary node to check."
	echo "[route 2]: The IP address of the Secundary node to check."
	echo "<debug>: optional Parameter. Shows the command for debuging."
	echo " "

        echo "Example:"
	echo "check_route 10.160.254.1   2   192.168.1.1 10.160.2.1" 
}


print_help() {
        echo "Nagios Plugin:   $PROGNAME $REVISION"
        echo "by Karl Alexander Monzon"
        echo ""

        print_usage

        echo " "
        support
        exit 0
}


case "$1" in
        --help)
                print_help
                exit 0
                ;;
        -h)
                print_help
                exit 0
                ;;
        --version)
	        print_revision $PROGNAME $REVISION
                exit 0
                ;;
        -V)
                print_revision $PROGNAME $REVISION
                exit 0
                ;;
        *)

		if [ "$#" -lt 4 ]; then
        		echo "This plugin requires 4 arguments."
			exit "4"
		fi
		if [ "$#" ==  4 ]; then
			DEBUG=0
		fi

		if [ $DEBUG == 1 ]; then 		
			echo "traceroute  -n $HOSTADDRESS | head -n $JUMP | tail -n 1"
		fi

		JUMP=`expr $NJUMP + 1`	
		RESULT=`traceroute  -n $HOSTADDRESS | head -n $JUMP | tail -n 1`
		SALTO=`echo $RESULT | cut -f 2 -d " "`

		if [ $DEBUG == 1 ]; then 		
			echo $SALTO
		fi
		
		# Check for the error message in the error file.	
		
		SUCCESS=`echo $RESULT | wc -l`

		if [ $SUCCESS == 0 ]; then
			OUTPUT="Error connecting to server running on $HOSTNAME."
			EXITCODE=2
		else
			if [ $SALTO == $ROUTE1 ]; then
				OUTPUT="TRACE OK: Primary Route $SALTO"
				EXITCODE=0
			else
				if [ $SALTO == $ROUTE2 ]; then
					OUTPUT="TRACE Warning: Secondary Route $SALTO"
       			 		EXITCODE=1
				else
					OUTPUT="TRACE Critical : Current Route to: $HOSTADDRESS   via: $SALTO"
					EXITCODE=2
				fi
			fi
		fi
		
		# Cleaning up.

		echo $OUTPUT
		exit $EXITCODE
                ;;
esac