#! /bin/sh

cleanup() {
    # remove delay, packet loss, etc. from the loopback interface
    sudo tc qdisc del dev lo root
}

sigcleanup() {
    cleanup; trap '' EXIT ; exit 1
}

# auto-cleanup on exit and when interrupted
trap cleanup EXIT
trap sigcleanup INT QUIT TERM

# add delay, jitter, and packet loss/corruption to packets going through the loopback interface
cleanup 2>/dev/null
sudo tc qdisc add dev lo root netem loss 1% corrupt 5% delay 10ms 1ms || exit 1

# run the simulations
inet -s -u Cmdenv voipreceiver.ini -c Loopback &
sleep 1
inet -s -u Cmdenv voipsender.ini -c Loopback || exit 1
wait