#!/bin/sh
#
#
echo "SCRIPT $0 [ip address] [down Kbits] [up Kbits] [test seconds] "
echo "TEST Alternate between no bandwidth limits and limited bandwidth with a delay between"
echo ""

ADDRESS="127.0.0.1"
UP="32"
DOWN="100"
SLEEP="30"

if [ ${1} ]; then
    ADDRESS=${1}
    echo "Address set. Using $ADDRESS"
 else
    echo "No Address given. Using $ADDRESS"
fi

if [ ${2} ]; then
    DOWN=${2}
    echo "Down link limit set. Using "$DOWN"kbits/s"
else
    echo "No down link limit given. Using "$DOWN"kbits/s"
    
fi

if [ ${3} ]; then
    UP=${3}
    echo "Up link limit set. Using "$UP"kbits/s"
else
    echo "No up link limit given. Using "$UP"kbits/s"
fi


if [ ${4} ]; then
    SLEEP=${4}
    echo "Test time set. Using $SLEEP seconds"
else
    echo "No test time. Using $SLEEP seconds"
fi

echo "Starting test"

while [ 1 ]
 do 
    
    ipfw delete pipe 1 2
    ipfw delete set 11 12
    ipfw disable firewall
    echo ""
    echo "Bandwidth open - no limit set"
    echo "Sleeping $SLEEP seconds"
    sleep 30
    echo ""

    echo "Setting $DOWN kbits down and $UP kbits up"
    ipfw pipe 1 config bw "$DOWN"kbits/s delay 0 queue 100 noerror
    ipfw pipe 2 config bw "$UP"kbits/s delay 0 queue 100 noerror

    ipfw add 11 set 11 pipe 1 src-ip $ADDRESS proto udp in
    ipfw add 12 set 12 pipe 2 src-ip $ADDRESS proto udp out

    ipfw set enable 11 
    ipfw set enable 12
    ipfw enable firewall one_pass

    echo "Sleeping $SLEEP seconds"
    sleep 30
    

done