#!/bin/sh

ethernet_interface="eth1"
ethernet_ping_ipaddr="172.21.3.22"
ethernet_ipaddr=$1

IFCONFIG=`which ifconfig`

$IFCONFIG $ethernet_interface up > /dev/null 2>&1
$IFCONFIG | grep $ethernet_interface > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "FAIL: $ethernet_interface is not up"
    exit 1
else
    echo "PASS: $ethernet_interface is up"
fi

if [ "x$ethernet_ipaddr" != "x" ]; then
    $IFCONFIG $ethernet_interface $ethernet_ipaddr
fi

$IFCONFIG $ethernet_interface |grep 'inet addr:' |sed -e 's@inet addr:@@' |sed q | awk '{print $1}' >/dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "FAIL: setup $ethernet_interface ipaddr failed"
    exit 1
else
    echo "PASS: setup $ethernet_interface ipaddr succeeded"
fi

mindatasize=56
maxdatasize=650
stepsize=100
iteration=1
datasize=$mindatasize
logfile=`/bin/mktemp`
statistics=`/bin/mktemp`
error=0

trap cleanup SIGHUP SIGINT SIGTERM

clean_tasks() {
    rm -f $logfile $statistics
}

cleanup() {
    echo "Aborting script execution"
    clean_tasks
    exit 0
}

while [ $datasize -le $maxdatasize ]; do
    for i in `seq 1 $iteration`; do
        ping -c 1 -s $datasize $ethernet_ping_ipaddr > $statistics
        ping_err=$?
        cat $statistics | grep "PING" > /dev/null 2>&1
        cat $statistics | grep "received" > /dev/null 2>&1
        [ `echo $?` -eq 0 ] || packets_received=0 && \
            packets_received=`cat $statistics | \
                grep "received" | awk '{print$4}'`

        # Evaluate possible errors on the ping operation
        if [ $ping_err -ne 0 ] || [ $packets_received -eq 0 ]; then
            error=1
            echo -e `cat $statistics | grep PING` >> $logfile 2>/dev/null
        fi
    done
    let datasize=$datasize+$stepsize
done

# Report failures
if [ $error -eq 1 ]; then
    echo "=================== error report ==================="
    cat $logfile
    echo "===================================================="
    clean_tasks
    echo -e "FAIL: $ethernet_interface test failed\n"
    exit 1
else
    clean_tasks
    echo -e "PASS: $ethernet_interface test passed"
fi

exit 0