ping_test.sh

#!/bin/bash

function usage
{
	echo "Usage: $0 <-a addr> [-n iterations] [-nn count]"
	exit 1
}

# If not enough arguments show usage
if [[ $# -lt 1 ]]
	then
	usage
fi

# Default args
iter=1
count=1

# Argument parsing
while getopts ":a:i:c:" o; do
    case "${o}" in
        a)
            addr=${OPTARG}
            ;;
        i)
            iter=${OPTARG}
            ;;
        c)
            count=${OPTARG}
            ;;
        *)
            usage
            ;;
    esac
done
shift $((OPTIND-1))

# If addr wasn't specified show usage
if [ -z "$addr" ]; then usage; fi

# Sums of each statistic
sum_pkt=0
sum_rcv=0
sum_loss=0
sum_time=0
sum_avg=0
sum_mdev=0

rtt_min=0
rtt_max=0

# Loop through pings
for (( i=1; i<=iter; i++ ))
do
	echo "iteration $i ==========================="
	output=$(ping $addr -c $count | tail -n 2)
	echo $output

	# If ping failed don't do anything else
	if (($? > 0)); then
		continue
	fi
	echo "[ ?? ] No break"
	
	# Exclude %, exclude 'ms', replace slashes with spaces give out only 1, 4, 6, 10 and 14'th column
	parsed=$(echo $output | tr '\n' ' ' | sed 's/%//g; s/ms//g; s/\// /g'| cut -d' ' -f1,4,6,10,17,18,19,20)

	# Split string to array
	arr=(`echo ${parsed}`);

	echo $parsed
	# Recording data for stats
	sum_pkt=$(echo "$sum_pkt+${arr[0]}" | bc)
	sum_rcv=$(echo "$sum_rcv+${arr[1]}" | bc)
	sum_loss=$(echo "$sum_loss+${arr[2]}" | bc)
	sum_time=$(echo "$sum_time+${arr[3]}" | bc)

	if [[ $(bc <<< "$rtt_min>${arr[4]}") -eq "1" ]]; then rtt_min=arr[4]; fi
	if [[ $(bc <<< "$rtt_max<${arr[6]}") -eq "1" ]]; then rtt_max=arr[6]; fi

	sum_avg=$(echo "scale=3; $sum_avg+${arr[5]}" | bc)
	sum_mdev=$(echo "scale=3; $sum_mdev+${arr[7]}" | bc)
done

# Averaging the average
sum_avg=$(echo "scale=3; $sum_avg/$iter" | bc)
sum_mdev=$(echo "scale=3; $sum_mdev/$iter" | bc)

echo
echo "Overall statistic"
echo "$sum_pkt packets transmitted, $sum_rcv received, $sum_loss% packet loss, time $sum_time ms"
echo "rtt (iterations) min/avg/max/mdev = $sum_min/$sum_avg/$sum_max/$sum_mdev ms"

# sum_pkt packets transmitted, sum_rcv received, sum_loss packet loss, time sum_time rtt min/avg/max/mdev = sum_min/sum_avg/sum_max/sum_mdev ms
# 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.033/0.033/0.033/0.000 ms