Class Port

java.lang.Object
  |
  +--Port

public abstract class Port

extends Object

Model of one port of a network device.

Version:

2002-04-10

Author:

Max Hailperin

Field Summary

static int	ALL_HOSTS special address (different from any Port's address) used as a multicast destination for all Hosts
static int	ALL_LOCAL_BRIDGES special address (different from any Port's address) used as a multicast destination for all Bridges on the local segment (that is, all Bridges that can be reached without going through a Bridge -- packets sent to this address are not to be forwarded by Bridges)

Constructor Summary

Port()

Method Summary

void	connect(Port peer) connects this Port to another Port, if this Port is disconnected
void	disconnect() disconnects this Port from the other Port it is connected to, if any
int	getAddress() returns this Port's address
abstract void	receive(Message m) receives a Message from the connected Port; should be processed appropriately by this Port's device
void	transmit(Message m) transmits a Message to the connected Port, if any

Methods inherited from class java.lang.Object

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

Field Detail

ALL_HOSTS

public static final int ALL_HOSTS

special address (different from any Port's address) used as a multicast destination for all Hosts

ALL_LOCAL_BRIDGES

public static final int ALL_LOCAL_BRIDGES

special address (different from any Port's address) used as a multicast destination for all Bridges on the local segment (that is, all Bridges that can be reached without going through a Bridge -- packets sent to this address are not to be forwarded by Bridges)

Constructor Detail

Port

public Port()

Method Detail

connect

public void connect(Port peer)

connects this Port to another Port, if this Port is disconnected

Parameters:

peer - specifies the other Port to connect to

disconnect

public void disconnect()

disconnects this Port from the other Port it is connected to, if any

getAddress

public int getAddress()

returns this Port's address

Returns:

this Port's address

receive

public abstract void receive(Message m)

receives a Message from the connected Port; should be processed appropriately by this Port's device

Parameters:

m - the Message being received

transmit

public void transmit(Message m)

transmits a Message to the connected Port, if any

Parameters:

m - the Message to transmit