From 4cae9ed6e99755af6a42bfeaa042537458f18805 Mon Sep 17 00:00:00 2001
From: Robin Krahl <guskraro@student.gu.se>
Date: Fri, 13 Oct 2017 16:34:49 +0200
Subject: Add script for packet drop measurements

---
 broccoli/script/measure-packets.sh | 89 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 broccoli/script/measure-packets.sh

diff --git a/broccoli/script/measure-packets.sh b/broccoli/script/measure-packets.sh
new file mode 100644
index 0000000..af38624
--- /dev/null
+++ b/broccoli/script/measure-packets.sh
@@ -0,0 +1,89 @@
+#!/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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