jist.swans.route
Class RouteAodv.RouteRequest

java.lang.Object
  jist.swans.route.RouteAodv.RouteRequest

Enclosing class:

RouteAodv

private static class RouteAodv.RouteRequest
extends java.lang.Object

Represents a request for a route by a node. A single route request can repeatedly broadcast RREQ messages, with increasing TTL value, until a route has been found. TTL values start at TTL_START, increment by TTL_INCREMENT, but do not exceed TTL_THRESHOLD.

Field Summary

private NetAddress	destIp Net address of node for which we seek a route.
private boolean	routeFound Indicates whether this request has been satisfied (route has been found).
private int	rreqId Route request identifier.
private RouteAodv	thisNode Reference to the encapsulating RouteAodv instance.
private byte	ttl Time to live.

Constructor Summary

RouteAodv.RouteRequest(NetAddress destIp, RouteAodv thisNode)
Constructs a new Route Request object.

Method Summary

void	broadcast() Creates and broadcasts a RREQ message.
NetAddress	getDest() Returns destination net address.
int	getRreqId() Return RREQ id.
byte	getTtl() Returns TTL.
void	incTtl() Increments the TTL value by TTL_INCREMENT, but ensures that it does not exceed TTL_THRESHOLD.
void	obtainNewRreqId() Assigns a fresh RREQ id number, and updates the node's global RREQ id counter.
void	setRouteFound(boolean b) Sets the Route Found flag.

Methods inherited from class java.lang.Object

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

Field Detail

destIp

private NetAddress destIp

Net address of node for which we seek a route.

rreqId

private int rreqId

Route request identifier.

ttl

private byte ttl

Time to live.

routeFound

private boolean routeFound

Indicates whether this request has been satisfied (route has been found). Once set to true, this entry can be removed from the route request list.

thisNode

private RouteAodv thisNode

Reference to the encapsulating RouteAodv instance.

Constructor Detail

RouteAodv.RouteRequest

public RouteAodv.RouteRequest(NetAddress destIp,
                              RouteAodv thisNode)

Constructs a new Route Request object.

Parameters:

destIp - net address of node for which we seek a route

thisNode - reference to this RouteAodv instance

Method Detail

getRreqId

public int getRreqId()

Return RREQ id.

Returns:

RREQ id

getDest

public NetAddress getDest()

Returns destination net address.

Returns:

destination net address

getTtl

public byte getTtl()

Returns TTL.

Returns:

TTL value

obtainNewRreqId

public void obtainNewRreqId()

Assigns a fresh RREQ id number, and updates the node's global RREQ id counter.

incTtl

public void incTtl()

Increments the TTL value by TTL_INCREMENT, but ensures that it does not exceed TTL_THRESHOLD.

setRouteFound

public void setRouteFound(boolean b)

Sets the Route Found flag.

Parameters:

b - value to assign to flag

broadcast

public void broadcast()

Creates and broadcasts a RREQ message. Also, updates RREQ buffer and routing table.