org.epics.ca.impl.repeater

Class UdpMessageSniffer

java.lang.Object

org.epics.ca.impl.repeater.UdpMessageSniffer

public class UdpMessageSniffer
extends java.lang.Object

Provides support for monitoring CA messages associated with UDP broadcasts sent to some port of interest. The CA protocol uses a mixture of broadcast and unicast messages. For a simple tool like this which does not leverage off the low-level, OS-specific, libraries that support the network interface hardware, the unicast messages remain invisible. This leaves only the following messages available for observation:

• CA Search Messages - sent from the CA Repeater to the IOC's listening socket which typically operate on port 5064.
• CA Beacon messages - sent from the IOC Send socket to the CA Repeater which typically listens on port 5065.

Constructor Summary

Constructors

Constructor and Description
UdpMessageSniffer()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] argv) Starts the UDP Message Sniffer from the command line.

Methods inherited from class java.lang.Object

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

Constructor Detail

UdpMessageSniffer

public UdpMessageSniffer()

Method Detail

main

public static void main(java.lang.String[] argv)

Starts the UDP Message Sniffer from the command line. The first and only argument should specify the port to monitor which will typically be the ports on which CA messages are broadcast (usually 5064 or 5065).

Parameters:

argv - arguments - should be exactly one.