Java Network Traffic Generator

External

• https://docs.oracle.com/javase/tutorial/networking/datagrams/broadcasting.html
• https://docs.oracle.com/javase/8/docs/api/java/net/MulticastSocket.html

Internal

• Linux Multicast Configuration

Overview

A Java program sends multicast socket using DatagramSocket and listens for multicast traffic with MulticastSocket.

GitHub

https://github.com/NovaOrdis/playground/tree/master/java/network/network-traffic

User Manual

Global Arguments

-d

Start in debug mode.

-v

Display verbose information about the network operation in process.

Any -D system properties are propagated verbatim to the JVM:

./bin/send -Djava.net.preferIPv4Stack=true ...

Common Arguments

--interface

--interface=<interface-name>|<address>

The network interface name is one of those returned by ip addr, or by ./info. An IP address can also be used.

Example:

--interface=eth0

--interface=172.20.1.11

--local-port

Forces the local port.

The network interface name is one of those returned by ip addr.

Payload

send accepts a payload argument.

Usage Examples

Sending/Receiving Multicast on Mac

Listening:

./bin/receive -v -Djava.net.preferIPv4Stack=true --protocol=multicast --address=225.5.5.5:5555

Sending:

./bin/send -v -Djava.net.preferIPv4Stack=true --protocol=multicast --address=225.5.5.5:5555 sometext