Network impairment server (generating problems on RTP streams : latency, delay, jitter)
This tool can be used anywhere with netfilter and iptables. This is can be very handy when you need to test how an RTP application behaves when facing problems, using scenarios the same problems can be reproduced many times.
apt-get update
apt-get install build-essential libnetfilter-queue-dev
./configure
make
This script will ouput examples of iptables command to pass traffic to the disruptor using netfilter queues
./prepare_firewall.sh server.domain.com
You may have to edit the script if your interfaces names are not wlan0 and/or eth0
./disruptor -h
-d daemonize
-q nfq queue id
-f scenario file name
-l log level: 0=error, 1=info, 2=notice, 3=debug
./prepare_firewall.sh webrtc.server.com 10.0.0.243
# execute the returned iptable commands
sudo OUTPUT -d 54.13.17.12 -p all -j NFQUEUE --queue-num 10
# run the disruptor
sudo ./disruptor -f scenario.xml -l 3
<?xml version="1.0"?>
<scenario>
<period duration="5"><action name="loss" rand="10"/></period>
<period duration="5"><action name="loss" rand="10"/></period>
</scenario>
burst_max : maximum random size of delayed burst in packets
interval_max : maximum random interval between burst in packets
burst_size : size of delayed burst in packets
interval_size : interval between burst in packets
outoforder : burst out of order
rand : percentage of losses to apply on the stream
rand : random interval in packets between occurrences
max : random size of the burst (consecutive packets) loss
rand : percentage loss of RTCP packets