Line speed test

listen.sh

#!/bin/bash

# This is the case on Ubuntu
# TODO: Write checks for other OSes
which nc.traditional 1>&2> /dev/null
return_value=$?
if [ ${return_value} -ne 0 ]; then
  echo "Traditional NC doesn't appear to be installed, please install 'netcat-traditional'"
  exit 1
fi

which bc 1>2&> /dev/null
return_value=$?
if [ ${return_value} -ne 0 ]; then
  echo "It appears BC is not installed, please install 'bc'"
  exit 1
fi

port_number=9999
temporary_file=$(mktemp)

echo "Netcat is listening on port ${port_number}, waiting for network input..."
nc.traditional -v -v -l -n -p ${port_number} 2>&1 | grep -v ^y &> ${temporary_file}

bytes_received=$(tail -n 1 ${temporary_file} | awk {'print $NF}')
rm ${temporary_file}

echo "${bytes_received} bytes received"

echo "Enter the number of 'real' seconds from the other machine, without the trailing 's'"
echo -n "Time: "
read real_seconds

megabits_per_second=$(echo "((${bytes_received} * 8) / 1000 / 1000) / ${real_seconds}" | bc -l)

echo "${megabits_per_second:0:8} Megabits per second"

send.sh

#!/bin/bash

if [ ""${1}"" == "" ]; then
  echo "You've got to pass an IP address to send data to, e.g.:"
  echo "${0} 192.168.1.2"
fi

port_number=9999
temporary_file=$(mktemp)

echo "Sending data.. hit CTRL+C when you're done"
/usr/bin/time --output=${temporary_file} --format="real %e" yes | nc -n ${1} ${port_number} 2>&1 > /dev/null

echo
echo
time_output=$(cat ${temporary_file} | grep -i real)
echo "Input this number on the other server: ${time_output}"

rm ${temporary_file}