verinec.netsim.components.layers
Class NetworkLayer

java.lang.Object
  desmoj.core.simulator.NamedObject
      desmoj.core.simulator.ModelComponent
          verinec.netsim.components.layers.abstractNetworkLayer
              verinec.netsim.components.layers.NetworkLayer

All Implemented Interfaces:

Observer, Subject

public class NetworkLayer
extends abstractNetworkLayer

A NetworkLayer (Layer 3 in the OSI Model).

Version:

$Revision:835 $

Author:

Dominik Jungo

Field Summary

private AddressTable	arpTable
private Vector	failed
private Vector	gateways
private Vector	lowerobserver

Constructor Summary

NetworkLayer(Model owner, EventProcessor processor)
Creates a new NetworkLayer

Method Summary

void	addArpEntry(IAddress address1, IAddress address2) Adds an arp entry to the Layers ''arp database''
void	addArpEntry(IAddress address1, IAddress address2, double time) Adds an arp entry to the Layers ''arp database'' at a given time
void	addFailed(IAddress address) Adds an address that failed in arp
void	addGateway(IPAddress address)
void	addObserverElement(Object arg0) Adds an Observer (layer 2) to the list of observers.
boolean	arpFailed(IAddress address) decides if the arp failed for the given addess
void	attachLower(Observer observer) Attaches a Observer to this Subject
void	forward(Packet packet, int i, Event logevent)
AddressTable	getArpTable() gets the Layers a arp table
IPAddress	getGatewayFor(IPAddress address)
IPAddress	getInterfaceFor(IPAddress dstAddress)
Enumeration	observerElements() gets the list of observers from the lower layer
void	removeFailed(IAddress address) removes an address from the list of failed arp
boolean	removeObserver(Object arg0) remove a observer from the lower observers list
void	sendDown(Packet packet, double timeoffset, ModelComponent sender, ILogger logger) sends a packet down to the physical layer
void	sendDownBoradcast(Packet packet, double timeoffset, ModelComponent sender, ILogger logger)
void	setArpTable(AddressTable arpTable) sets the Layers ARP table

Methods inherited from class verinec.netsim.components.layers.abstractNetworkLayer

addAddress, addProcessor, addresses, attachUpper, compareAddress, detachLower, detachUpper, getDownEvent, getFirstAddress, getLayerName, getLowerobserver, getNode, getProcessor, getUpEvent, processorelements, sendDown, sendUp, setNode

Methods inherited from class desmoj.core.simulator.ModelComponent

current, currentEntity, currentEvent, currentModel, currentSimProcess, currentTime, debugIsOn, debugOff, debugOn, epsilon, getModel, isExperimentCompatible, isModelCompatible, sendDebugNote, sendMessage, sendTraceNote, sendWarning, skipTraceNote, skipTraceNote, traceIsOn, traceOff, traceOn

Methods inherited from class desmoj.core.simulator.NamedObject

getName, getQuotedName, rename, toString

Methods inherited from class java.lang.Object

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

Field Detail

arpTable

private AddressTable arpTable

failed

private Vector failed

lowerobserver

private Vector lowerobserver

gateways

private Vector gateways

Constructor Detail

NetworkLayer

public NetworkLayer(Model owner,
                    EventProcessor processor)

Creates a new NetworkLayer

Parameters:

owner - a Model

processor - a processor that acts in this layer

Method Detail

addArpEntry

public void addArpEntry(IAddress address1,
                        IAddress address2)

Adds an arp entry to the Layers ''arp database''

Parameters:

address1 - a key address

address2 - an addess associated to the key

addArpEntry

public void addArpEntry(IAddress address1,
                        IAddress address2,
                        double time)

Adds an arp entry to the Layers ''arp database'' at a given time

Parameters:

address1 - a key address

address2 - an addess associated to the key

time - a time value

addFailed

public void addFailed(IAddress address)

Adds an address that failed in arp

Parameters:

address - an address that failed in arp

addObserverElement

public void addObserverElement(Object arg0)

Adds an Observer (layer 2) to the list of observers.

Parameters:

arg0 - an Observer

attachLower

public void attachLower(Observer observer)

Description copied from interface: Subject

Attaches a Observer to this Subject

Specified by:

attachLower in interface Subject

Overrides:

attachLower in class abstractNetworkLayer

Parameters:

observer - The observing Object

See Also:

abstractNetworkLayer.attachLower(verinec.netsim.components.layers.Observer)

getArpTable

public AddressTable getArpTable()

gets the Layers a arp table

Returns:

the Layers a arp table

observerElements

public Enumeration observerElements()

gets the list of observers from the lower layer

Returns:

the list of observers from the lower layer

removeFailed

public void removeFailed(IAddress address)

removes an address from the list of failed arp

Parameters:

address - an address that failed to resolve with arp

removeObserver

public boolean removeObserver(Object arg0)

remove a observer from the lower observers list

Parameters:

arg0 - an observer

Returns:

true if the Vector contained the specified element

arpFailed

public boolean arpFailed(IAddress address)

decides if the arp failed for the given addess

Parameters:

address - an address

Returns:

true if the arp failed for the given addess

sendDown

public void sendDown(Packet packet,
                     double timeoffset,
                     ModelComponent sender,
                     ILogger logger)

sends a packet down to the physical layer

Parameters:

packet - a packet

timeoffset - a time offset

sender - sender of this packet

logger - a logger

sendDownBoradcast

public void sendDownBoradcast(Packet packet,
                              double timeoffset,
                              ModelComponent sender,
                              ILogger logger)

setArpTable

public void setArpTable(AddressTable arpTable)

sets the Layers ARP table

Parameters:

arpTable - a srp table

addGateway

public void addGateway(IPAddress address)

getGatewayFor

public IPAddress getGatewayFor(IPAddress address)

forward

public void forward(Packet packet,
                    int i,
                    Event logevent)

getInterfaceFor

public IPAddress getInterfaceFor(IPAddress dstAddress)