Package edu.nps.moves.dis7.examples

Class EspduSender

java.lang.Object

edu.nps.moves.dis7.examples.EspduSender

public class EspduSender
extends Object

Creates and sends ESPDUs in IEEE binary format. Adapted from OpenDIS library example package edu.nps.moves.examples

Author:

Don McGregor, Don Brutzman

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	EspduSender.NetworkMode	Type of network connection: Point to point UNICAST, Many to many MULTICAST, or (rarely used, potentially harmful) BROADCAST

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_MULTICAST_ADDRESS	Default multicast group address we send on.
static final int	DEFAULT_MULTICAST_PORT	Default multicast port used, matches Wireshark DIS capture default
static final int	SEND_LOOPS_TO_PERFORM	Number of complete loops to perform.

Constructor Summary

Constructors

Constructor	Description
EspduSender()	Default constructor

Method Summary

Modifier and Type	Method	Description
static Set<InetAddress>	getBroadcastAddresses()	A number of sites get all snippy about using 255.255.255.255 for a broadcast address; it trips their security software and they kick you off their network.
static void	main(String[] args)	Possible system properties, passed in via -Dattr=val networkMode: unicast, broadcast, multicast destinationIp: where to send the packet.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

SEND_LOOPS_TO_PERFORM

public static final int SEND_LOOPS_TO_PERFORM

Number of complete loops to perform. Putting any upper limit on # packets sent avoids possibility of non-terminating infinite loops that continue sending packets.

See Also:

• Constant Field Values

DEFAULT_MULTICAST_ADDRESS

public static final String DEFAULT_MULTICAST_ADDRESS

Default multicast group address we send on.

See Also:

• https://en.wikipedia.org/wiki/Multicast_address
• Constant Field Values

DEFAULT_MULTICAST_PORT

public static final int DEFAULT_MULTICAST_PORT

Default multicast port used, matches Wireshark DIS capture default

See Also:

• https://en.wikipedia.org/wiki/Port_(computer_networking)
• Constant Field Values

Constructor Details

EspduSender

public EspduSender()

Default constructor

Method Details

main

public static void main(String[] args)

Possible system properties, passed in via -Dattr=val networkMode: unicast, broadcast, multicast destinationIp: where to send the packet. If in multicast mode, this can be multicast. To determine broadcast destination IP, use an online broadcast address calculator, for example http://www.remotemonitoringsystems.ca/broadcast.php If in multicast mode, a join() will be done on the multicast address. port: port used for both source and destination.

Parameters:

args - command-line arguments

getBroadcastAddresses

public static Set<InetAddress> getBroadcastAddresses()

A number of sites get all snippy about using 255.255.255.255 for a broadcast address; it trips their security software and they kick you off their network. (Comcast, NPS, etc.) This determines the broadcast address for all connected interfaces, based on the IP and subnet mask. If you have a dual-homed host it will return a broadcast address for both. If you have some VMs running on your host this will pick up the addresses for those as well--e.g. running VMWare on your laptop with a local IP this will also pick up a 192.168 address assigned to the VM by the host OS.

Returns:

set of all broadcast addresses