#!/bin/sh
#
# Copyright (c) 2016 Babak Farrokhi.  All rights reserved.
#       
# 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.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
#
#
# 12-Aug-2015 @farrokhi
# This script graphs ICMP RTT to remove given hosts using ping utility.
# It uses all IP addresses as source address on given interface.
#
# Configuration sample:
# [multiping_*]
# user root
# env.interface igb0:1 igb1:2
# env.hosts "4.2.2.4, ripe.net, 192.168.0.5, 8.8.4.4"
#
#
# with env.interface variable, every interface should be suffixed with
# its fib number. In a normal environment, fib should always be 0. If
# you are using multiple routing tables you should use correct fib 
# number (e.g. igb1 on fib 4 will be igb1:4).
#
#
# Magic markers:
#%# family=auto
#%# capabilities=autoconf suggest


SCRIPT_NAME=$(basename $0)
SRC=`echo $SCRIPT_NAME | sed -n s/multiping_//p | cut -f1 -d_`
FIB=`echo $SCRIPT_NAME | sed -n s/multiping_//p | cut -f2 -d_`
FPING=`which fping` || ( echo "fping required but not found"; exit 1)
FSRC=`echo ${SRC} | sed 's/\./_/g'`
SETFIB="/usr/sbin/setfib ${FIB}"

if [ $# -lt 1 ]; then

	if [ -z "${SRC}" ]; then
		echo "should run from symlink"
		exit 1
	fi
	
	if [ -z "${hosts}" ]; then
		echo "Unknown destination address"
		exit 1
	fi

	TMPFILE=`mktemp -t multiping`

	DST=`echo ${hosts} | tr , " "`
	fname=`echo ${DST} | sed 's/\./_/g'` 

	${SETFIB} ${FPING} -A -q -s -i10 -c50 -p 25 -S ${SRC} -t1000 ${DST} 2>&1 | grep ':' | tr '%/,' ' ' | awk '
/xmt/ { 
        name = $1;
	gsub(/\./, "_", name);
        printf "rtt_%s.value %0.0f\n", name, $15; 
        printf "loss_%s.value %0.0f\n", name, $9; 
}
' >> ${TMPFILE}
	
	echo "multigraph rtt_${FSRC}"
	grep ^rtt ${TMPFILE}
	echo "multigraph loss_${FSRC}"
	grep ^loss ${TMPFILE}
	rm ${TMPFILE}

elif [ "$1" == "suggest" ]; then
	
	# interface name format is igb0:2 - number after colon is fib number
	for int in ${interface}; do
		FIB=`echo ${int} | cut -f2 -d:`
		NAME=`echo ${int} | cut -f1 -d:`
		IPS=`ifconfig ${NAME} | grep -v tunnel | awk '/inet /{print $2}' | grep -Ev '^(10|192|127)\.'`
		for DST in ${IPS}; do
			echo ${DST}_${FIB}
		done
	done


elif [ "$1" == "autoconf" ]; then

	if [ -z "${hosts}" ]; then
		echo "no (env.hosts is not defined)"
		exit 1
	fi

	if [ -z "${interface}" ]; then
		echo "no (env.interface is not defined)"
		exit 1
	fi

	### check env vars and return no if not set properly
	echo yes
   	exit 0

elif [ "$1" == "config" ]; then

	if [ -z "${SRC}" ]; then
		exit 1
	fi

	echo "multigraph rtt_${FSRC}"
	echo "graph_title RTT Statistics for ${SRC}"
	echo "graph_args --lower-limit 0 --base 1000"
	echo "graph_vlabel milliseconds"
	echo "graph_category connectivity"
	echo "graph_info This graph shows ICMP RTT for {$SRC} on FIB ${FIB} toward multiple destination hosts"

	COLOR=7
	for DST in `echo ${hosts} | tr , " "`; do
		fname=`echo ${DST} | sed 's/\./_/g'`
		echo rtt_${fname}.type GAUGE
		echo rtt_${fname}.draw LINE1
		echo rtt_${fname}.min 0
		echo rtt_${fname}.colour COLOUR${COLOR}
		echo rtt_${fname}.label ${DST}
		COLOR=`expr ${COLOR} + 1`
	done
	
	echo "multigraph loss_${FSRC}"
	echo "graph_title Packet Loss Statistics for ${SRC}"
	echo "graph_args --units-exponent 0 -r --upper-limit 100 --lower-limit 0 --base 1000"
	echo "graph_scale no"
	echo "graph_vlabel percent"
	echo "graph_category connectivity"
	echo "graph_info This graph shows ICMP Packet Loss for source address ${SRC} on FIB ${FIB} toward multiple destination hosts"

	COLOR=7
	for DST in `echo ${hosts} | tr , " "`; do
		fname=`echo ${DST} | sed 's/\./_/g'`
		echo loss_${fname}.type GAUGE
		echo loss_${fname}.draw LINE2
		echo loss_${fname}.min 0
		echo loss_${fname}.max 100
		echo loss_${fname}.colour COLOUR${COLOR}
		echo loss_${fname}.label ${DST}
		COLOR=`expr ${COLOR} + 1`
	done

fi