jist.swans.route
Class RouteAodv.PrecursorSet

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

Enclosing class:

RouteAodv

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

Represents the set of neighboring nodes which (likely) route through this node. -A node periodically sends HELLO messages to its precursors, signaling to them that this node is still in range to receive packets. -A node also may send RERR messages to its precursors, informing them of broken routes.

Field Summary

private java.util.Map	map Data structure for storing the precursor set.
private RouteAodv	thisNode Reference to this RouteAodv instance.

Constructor Summary

RouteAodv.PrecursorSet(RouteAodv thisNode)
Constructs a new PrecursorSet object.

Method Summary

void	add(MacAddress m) Adds an item to the precursor set.
RouteAodv.PrecursorInfo	getInfo(MacAddress m) Returns information for a precursor node.
java.util.Iterator	iterator() Returns an Iterator for the set.
void	remove(MacAddress m) Removes an item from the precursor set.
void	sendRERR(java.util.LinkedList nodes, byte ttl) Sends a RERR message to all precursors.

Methods inherited from class java.lang.Object

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

Field Detail

map

private java.util.Map map

Data structure for storing the precursor set.

thisNode

private RouteAodv thisNode

Reference to this RouteAodv instance.

Constructor Detail

RouteAodv.PrecursorSet

public RouteAodv.PrecursorSet(RouteAodv thisNode)

Constructs a new PrecursorSet object.

Parameters:

thisNode - reference to this RouteAodv instance

Method Detail

iterator

public java.util.Iterator iterator()

Returns an Iterator for the set. Each item of the iterator is of type Map.Entry, with map keys of type MacAddress, and map values of type PrecursorInfo

Returns:

the iterator

add

public void add(MacAddress m)

Adds an item to the precursor set.

Parameters:

m - Mac address of node to add to set

remove

public void remove(MacAddress m)

Removes an item from the precursor set.

Parameters:

m - Mac address of the node to remove from set

getInfo

public RouteAodv.PrecursorInfo getInfo(MacAddress m)

Returns information for a precursor node.

Parameters:

m - mac address of the precursor node

Returns:

precursor information

sendRERR

public void sendRERR(java.util.LinkedList nodes,
                     byte ttl)

Sends a RERR message to all precursors.

Parameters:

nodes - the list of destination addresses (of type NetAddress) to include in RERR message

ttl - TTL value to use