jist.swans.route
Class RouteZrpIerp

java.lang.Object
  jist.swans.route.RouteZrpIerp

All Implemented Interfaces:

Protocol, Timer, RouteInterface.Zrp.Ierp

public class RouteZrpIerp
extends java.lang.Object
implements RouteInterface.Zrp.Ierp, Timer

Zone Routing Protocol: IntErzone Routing (sub)Protocol: Default implementation.

Since:

SWANS1.0

Version:

$Id: RouteZrpIerp.java,v 1.12 2005/03/13 16:11:55 barr Exp $

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

private static class	RouteZrpIerp.MessageIerp IERP (IntErzone Routing Protocol) packet.
static class	RouteZrpIerp.MessageQueue Queue of message waiting for route replies.
private static class	RouteZrpIerp.QueuedPacket Packet queued and waiting to be sent.
private static class	RouteZrpIerp.RouteEntry IERP routing entry.

Field Summary

static org.apache.log4j.Logger	logIERP logger for IERP events.
private RouteZrpIerp.MessageQueue	mq outgoing message queue.
static long	QUEUE_LIFETIME packet queue expiration.
static long	QUEUE_REFRESH packet queue refresh timer (check for expiration).
private java.util.HashMap	routes inter-zone routes: NetAddress - RouteEntry.
private short	routeSeq ierp identifier.
private RouteZrp	zrp reference to zrp routing framework.

Constructor Summary

RouteZrpIerp(RouteZrp zrp)
Create new "default" IERP (ZRP sub-protocol) handler.

RouteZrpIerp(RouteZrp zrp, java.lang.String config)
Create new "default" IERP (ZRP sub-protocol) handler.

Method Summary

private NetAddress[]	getRoute(NetAddress dst) Return IERP route.
private boolean	hasRoute(NetAddress dst) Return whether IERP table has a route.
private short	incSeq() Return new IERP sequence number.
void	receive(RouteInterface.Zrp.MessageIerp msg) Process incoming IERP packet.
void	send(NetMessage.Ip ip) Route and send given network message.
void	start() Start running protocol.
void	timeout() Timer expiration processing.
void	zoneChanged() Process IARP signal to IERP that zone information has changed.

Methods inherited from class java.lang.Object

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

Field Detail

logIERP

public static final org.apache.log4j.Logger logIERP

logger for IERP events.

QUEUE_LIFETIME

public static final long QUEUE_LIFETIME

packet queue expiration.

See Also:

Constant Field Values

QUEUE_REFRESH

public static final long QUEUE_REFRESH

packet queue refresh timer (check for expiration).

See Also:

Constant Field Values

zrp

private RouteZrp zrp

reference to zrp routing framework.

routes

private java.util.HashMap routes

inter-zone routes: NetAddress - RouteEntry.

routeSeq

private short routeSeq

ierp identifier.

mq

private RouteZrpIerp.MessageQueue mq

outgoing message queue.

Constructor Detail

RouteZrpIerp

public RouteZrpIerp(RouteZrp zrp)

Create new "default" IERP (ZRP sub-protocol) handler.

Parameters:

zrp - object reference to zrp routing framework

RouteZrpIerp

public RouteZrpIerp(RouteZrp zrp,
                    java.lang.String config)

Create new "default" IERP (ZRP sub-protocol) handler.

Parameters:

zrp - object reference to zrp routing framework

config - configuration string

Method Detail

incSeq

private short incSeq()

Return new IERP sequence number.

Returns:

new IERP sequence number.

hasRoute

private boolean hasRoute(NetAddress dst)

Return whether IERP table has a route.

Parameters:

dst - destination node

Returns:

whether IERP knows route to given destination

getRoute

private NetAddress[] getRoute(NetAddress dst)

Return IERP route.

Parameters:

dst - destination node

Returns:

IERP route to given destination, nor NullPointerException if it does not exist

start

public void start()

Start running protocol.

Specified by:

start in interface Protocol

zoneChanged

public void zoneChanged()

Process IARP signal to IERP that zone information has changed.

Specified by:

zoneChanged in interface RouteInterface.Zrp.Ierp

receive

public void receive(RouteInterface.Zrp.MessageIerp msg)

Process incoming IERP packet.

Specified by:

receive in interface RouteInterface.Zrp.Ierp

Parameters:

msg - ierp packet

send

public void send(NetMessage.Ip ip)

Route and send given network message.

Specified by:

send in interface RouteInterface.Zrp.Ierp

Parameters:

ip - network message to route and send

timeout

public void timeout()

Timer expiration processing.

Specified by:

timeout in interface Timer