verinec.netsim.components.layers
Class TransportLayer

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

All Implemented Interfaces:

Observer, Subject

public class TransportLayer
extends abstractNetworkLayer

Transport Layer (Layer 4 in the OSI Model)

Version:

$Revision: 794 $

Author:

Dominik Jungo

Field Summary

private Vector	datagramSockets
int	maxTCPSegmentSize the size of a tcp Segment
private RoutingTable	routingtable
private Vector	Sockets

Constructor Summary

TransportLayer(Model owner, EventProcessor processor, RoutingTable routingtable)
Constructs a new TransportLayer

Method Summary

void	bind(SocketImpl impl) Binds a SocketImplementation with a localaddress on this host
void	bindUDP(DatagramSocketImpl impl) Binds a DatagramSocketImplementation on this host
IAddress	getInterface(IAddress dst) gets the address used as localhost when sending data to dst
IAddress	getLocalAddress() gets the local IPAddress of this Layer, which is the first Address associated to this Layer
SocketImpl	getSocketImpl(int port) Gets a SocketImpl associated to a given port
SocketImpl	getSocketImpl(int localport, IAddress remoteaddress, int remoteport) gets a bound socket from this host, null if there isn't a bound socket with specified parameters
DatagramSocketImpl	getUDPSocketImpl(int port) Gets a Datagram SocketImpl associated to a given port
boolean	isPortFree(int port) checks if a a socket is port to a given portnumber
boolean	isUDPPortFree(int port) checks if a a datagram socket is port to a given portnumber
void	sendDown(Packet packet, double timeoffset, ILogger logger) Sends a Packet to the lower Layers(Observers).
void	unbind(SocketImpl impl) removes a Socket from the bound Sockets list
void	unbindUDP(DatagramSocketImpl impl) removes a datagram Socket from the bound Sockets list

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

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

routingtable

private RoutingTable routingtable

Sockets

private Vector Sockets

datagramSockets

private Vector datagramSockets

maxTCPSegmentSize

public int maxTCPSegmentSize

the size of a tcp Segment

Constructor Detail

TransportLayer

public TransportLayer(Model owner,
                      EventProcessor processor,
                      RoutingTable routingtable)

Constructs a new TransportLayer

Parameters:

owner - a model

processor - a processor

routingtable - a routing table

Method Detail

sendDown

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

Description copied from interface: Subject

Sends a Packet to the lower Layers(Observers). This is equivalent to the Notify Method

Specified by:

sendDown in interface Subject

Overrides:

sendDown in class abstractNetworkLayer

Parameters:

packet - The Packet to be sent down

timeoffset - timeoffset added to now, when tje packet should arrive

logger - logger used to log all events caused by this event

See Also:

abstractNetworkLayer.sendDown(verinec.netsim.entities.packets.Packet, double, verinec.netsim.loggers.ILogger)

getLocalAddress

public IAddress getLocalAddress()

gets the local IPAddress of this Layer, which is the first Address associated to this Layer

Returns:

the local IPAddress of this Layer

getInterface

public IAddress getInterface(IAddress dst)

gets the address used as localhost when sending data to dst

Parameters:

dst - an address

Returns:

the address used as localhost when sending data to dst

bind

public void bind(SocketImpl impl)

Binds a SocketImplementation with a localaddress on this host

Parameters:

impl - a Socket Implementation

isPortFree

public boolean isPortFree(int port)

checks if a a socket is port to a given portnumber

Parameters:

port - a portnumber to check

Returns:

true if no socket is bound to given portnumber, false otherwise

getSocketImpl

public SocketImpl getSocketImpl(int localport,
                                IAddress remoteaddress,
                                int remoteport)

gets a bound socket from this host, null if there isn't a bound socket with specified parameters

Parameters:

localport - localport of the bound socket

remoteaddress - remote adddress of the bound socket

remoteport - remote port of the bound socket

Returns:

the bound socket

getSocketImpl

public SocketImpl getSocketImpl(int port)

Gets a SocketImpl associated to a given port

Parameters:

port - a port

Returns:

the SocketImpl associated to the given port

getUDPSocketImpl

public DatagramSocketImpl getUDPSocketImpl(int port)

Gets a Datagram SocketImpl associated to a given port

Parameters:

port - a port

Returns:

the SocketImpl associated to the given port

unbind

public void unbind(SocketImpl impl)

removes a Socket from the bound Sockets list

Parameters:

impl - a Socket the should be removed from the bound list

isUDPPortFree

public boolean isUDPPortFree(int port)

checks if a a datagram socket is port to a given portnumber

Parameters:

port - a portnumber to check

Returns:

true if no socket is bound to given portnumber, false otherwise

bindUDP

public void bindUDP(DatagramSocketImpl impl)

Binds a DatagramSocketImplementation on this host

Parameters:

impl - a Socket Implementation

unbindUDP

public void unbindUDP(DatagramSocketImpl impl)

removes a datagram Socket from the bound Sockets list

Parameters:

impl - a datagram Socket the should be removed from the bound list