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#!/bin/sh
##############################################################################
# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
set -e
# Commandline arguments
DST_IP=$1 # destination IP address
NUM_PORTS=$2 # number of source ports
PKT_SIZE=$3 # packet size
DURATION=$4 # test duration (seconds)
# Configuration
UDP_SRC_MIN=1000 # UDP source port min
UDP_SRC_MAX=$(( UDP_SRC_MIN + NUM_PORTS - 1 )) # UDP source port max
UDP_DST_MIN=1000 # UDP destination port min
UDP_DST_MAX=$(( UDP_DST_MIN + NUM_PORTS )) # UDP destination port max
# helper function to send commands to pktgen
pgset()
{
local result
echo $1 > $PGDEV
result=$(cat $PGDEV | fgrep "Result: OK:")
if [ "$result" = "" ]; then
cat $PGDEV | fgrep "Result:" >/dev/stderr
exit 1
fi
}
# configure pktgen (see pktgen doc for details)
pgconfig()
{
#
# Thread commands
#
PGDEV=/proc/net/pktgen/kpktgend_0
# Remove all devices from this thread
pgset "rem_device_all"
# Add device to thread
pgset "add_device $DEV"
#
# Device commands
#
PGDEV=/proc/net/pktgen/$DEV
# 0 means continious sends untill explicitly stopped
pgset "count 0"
# use single SKB for all transmits
pgset "clone_skb 0"
# packet size, NIC adds 4 bytes CRC
pgset "pkt_size $PKT_SIZE"
# random address within the min-max range
pgset "flag IPDST_RND UDPSRC_RND UDPDST_RND"
# destination IP
pgset "dst_min $DST_IP"
pgset "dst_max $DST_IP"
# destination MAC address
pgset "dst_mac $MAC"
# source UDP port range
pgset "udp_src_min $UDP_SRC_MIN"
pgset "udp_src_max $UDP_SRC_MAX"
# destination UDP port range
pgset "udp_dst_min $UDP_DST_MIN"
pgset "udp_dst_max $UDP_DST_MAX"
}
# run pktgen
pgrun()
{
# Time to run, result can be vieved in /proc/net/pktgen/$DEV
PGDEV=/proc/net/pktgen/pgctrl
# Will hang, Ctrl-C or SIGINT to stop
pgset "start" start
}
# run pktgen for ${DURATION} seconds
run_test()
{
pgrun &
pid=$!
sleep $DURATION
kill -INT $pid
wait; sleep 1
}
# write the result to stdout in json format
output_json()
{
sent=$(awk '/^Result:/{print $5}' <$PGDEV)
pps=$(awk 'match($0,/'\([0-9]+\)pps'/, a) {print a[1]}' <$PGDEV)
errors=$(awk '/errors:/{print $5}' <$PGDEV)
flows=$(( NUM_PORTS * (NUM_PORTS + 1) ))
echo { '"packets_sent"':$sent , '"packets_per_second"':$pps, '"flows"':$flows, '"errors"':$errors }
}
# main entry
main()
{
modprobe pktgen
ping -c 3 $DST_IP >/dev/null
# destination MAC address
MAC=`arp -n | grep -w $DST_IP | awk '{print $3}'`
# outgoing interface
DEV=`arp -n | grep -w $DST_IP | awk '{print $5}'`
# setup the test
pgconfig
# run the test
run_test >/dev/null
PGDEV=/proc/net/pktgen/$DEV
# check result
result=$(cat $PGDEV | fgrep "Result: OK:")
if [ "$result" = "" ]; then
cat $PGDEV | fgrep Result: >/dev/stderr
exit 1
fi
# output result
output_json
}
main
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