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#!/bin/bash
function measure_packets {
TCPREPLAY_SPEED=$1
TCPREPLAY_COUNT=$2
bro -i "${BRO_INTERFACE}" -C -b Log::default_writer=Log::WRITER_NONE "${BRO_SCRIPT}" 2> bro-err.txt &
BRO_PID=$!
tcpreplay -i "${BRO_INTERFACE}" -M "${TCPREPLAY_SPEED}" -L "${TCPREPLAY_COUNT}" "${TCPREPLAY_DUMP}" > /dev/null 2> /dev/null
PCPU="100.0"
while [[ $(echo "${PCPU}>50" | bc) -eq 1 ]]
do
sleep 1
PCPU=$(ps -q ${BRO_PID} -o pcpu --no-headers)
done
kill -SIGINT "${BRO_PID}"
sleep 1
tail -1 bro-err.txt | awk -F' ' '{print $5}'
}
if [[ $# -ne 3 ]]
then
echo "Executes Bro and tcpreplay and measures the number of packages"
echo "received and handled by Bro."
echo
echo "Usage:"
echo " $0 SCRIPT IFACE DUMP"
echo "Arguments:"
echo " SCRIPT the Bro script to execute"
echo " IFACE the interface for Bro to listen on"
echo " DUMP the network dump to replay"
exit 1
fi
if [[ $(id -u) -ne 0 ]]
then
echo "Must be run as root. Aborting."
exit 1
fi
BRO_SCRIPT=$1
BRO_INTERFACE=$2
TCPREPLAY_DUMP=$3
SPEEDS=(400 200 100 50 25)
COUNTS=($(seq 400000 100000 2600000))
if [[ ! -r "${BRO_SCRIPT}" ]]
then
echo "The Bro script '${BRO_SCRIPT}' does not exist. Aborting."
exit 1
fi
if [[ ! -r "${TCPREPLAY_DUMP}" ]]
then
echo "The network dump '${TCPREPLAY_DUMP}' does not exist. Aborting."
exit 1
fi
BRO_SCRIPT=$(realpath "${BRO_SCRIPT}")
TCPREPLAY_DUMP=$(realpath "${TCPREPLAY_DUMP}")
BRO_DIR=$(mktemp --directory --tmpdir bro.XXX)
cd "${BRO_DIR}"
echo -ne "sent\t"
for SPEED in ${SPEEDS[@]}
do
echo -ne "${SPEED}\t"
done
echo
for COUNT in ${COUNTS[@]}
do
echo -ne "${COUNT}\t"
for SPEED in ${SPEEDS[@]}
do
COUNT_RECEIVED=$(measure_packets ${SPEED} ${COUNT})
echo -ne "${COUNT_RECEIVED}\t"
done
echo
done
rm -rf "${BRO_DIR}"
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