uk.org.arlott.simon.hw.f24.lbsta
Class BridgePort

java.lang.Object
  uk.org.arlott.simon.hw.f24.lbsta.BridgePort

All Implemented Interfaces:

PacketDestination, PacketTransport

public class BridgePort
extends java.lang.Object
implements PacketTransport, PacketDestination

Represents a bridge port on the network.

Field Summary

static int	BLOCKING Bridge port blocking state.
private Bridge	bridge The bridge this port is part of.
private java.util.HashSet<BridgePort>	bridgePorts The bridge ports connected to this brigde port.
boolean	configPending Configuration message pending flag.
int	designatedBridge The designated bridge on the LAN.
int	designatedCost The designated cost on the LAN.
int	designatedPort The designated port on the LAN.
int	designatedRoot The designated root on the LAN.
static int	DISABLED Bridge port disabled state.
int	forwardDelayTimer The forward delay timer.
static int	FORWARDING Bridge port forwarding state.
int	holdTimer The hold timer.
static int	HORIZONTAL_LEFT Bridge port is horizonal at the left of the bridge.
static int	HORIZONTAL_RIGHT Bridge port is horizonal at the right of the bridge.
private int	id The ID of this bridge port.
private java.util.HashSet<LAN>	lans The LANs connected to this bridge port.
static int	LEARNING Bridge port learning state.
static int	LISTENING Bridge port listening state.
static int	MAX_ID Maximum bridge port ID.
int	messageAgeTimer The message age timer.
private java.util.HashSet<Packet>	packets The packets on this bridge port.
private int	pathCost The path cost of this bridge port.
private int	state The state of this bridge port.
static java.lang.String[]	STATES The port states as strings.
boolean	topologyChangeAcknowledge Topology change acknowledgement flag.
static int	VERTICAL_BOTTOM Bridge port is vertical at the bottom of the bridge.
static int	VERTICAL_TOP Bridge port is vertical at the top of the bridge.
private int	x The X co-ordinate position of this bridge port.
private int	y The Y co-ordinate position of this bridge port.

Constructor Summary

BridgePort(Bridge bridge, int x, int y)
Creates a new BridgePort.

Method Summary

void	addPacket(Packet p) Adds a packet to this bridge port.
private void	checkConnect() Check if the bridge is connected to anything and enable the port if possible.
private void	checkDisconnect() Check if the bridge is connected to anything and disable the port if neccessary.
void	connect(BridgePort b) Connects to a bridge port.
void	connect(LAN l) Connects to LAN.
void	disable() Disable the port.
void	disconnect(BridgePort b) Disconnects from a bridge port.
void	disconnect(LAN l) Disconnects from a LAN.
void	disconnectAll() Disconnects from all LANs and bridge ports and removes all packets.
void	enable() Enable the port (only if it is connected to something).
Bridge	getBridge() Gets the bridge this port is connected to.
java.util.Vector<BridgePort>	getBridgePorts() Gets all bridge ports connected to this bridge port.
int	getID() Gets this bridge port's ID.
java.util.HashSet<LAN>	getLANs() Get all LANs connected to this bridge port.
java.util.Vector<Packet>	getPackets() Gets all the packets on this bridge port.
int	getPathCost() Gets the path cost of this bridge port.
int	getState() Gets the state of this bridge port.
int	getType() Gets the type of this port.
int	getX() Gets the X position of this port.
int	getXoffset() Gets the X offset position of this port.
int	getY() Gets the Y position of this port.
int	getYoffset() Gets the Y offset position of this port.
boolean	isConnected() Find out if this bridge port is connected to any LANs or bridge ports.
boolean	isConnectedTo(BridgePort b) Find out if this bridge port is connected to another bridge port.
boolean	isConnectedTo(LAN l) Find out if this bridge port is connected to a LAN.
void	presetID(int id) Presets this bridge port's ID (before it has been connected to anything).
java.util.Vector<Packet>	processPacket(Packet p) Processes a packet received by this bridge port.
void	removeAllPackets() Removes all packets from this bridge port.
void	removePacket(Packet p) Removes a packet from this bridge port.
void	setID(int id) Sets this bridge port's ID.
void	setPathCost(int pathCost) Sets the path cost of this bridge port.
void	setState(int newState) Sets the state of the bridge port.

Methods inherited from class java.lang.Object

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

Field Detail

HORIZONTAL_LEFT

public static final int HORIZONTAL_LEFT

Bridge port is horizonal at the left of the bridge.

See Also:

Constant Field Values

HORIZONTAL_RIGHT

public static final int HORIZONTAL_RIGHT

Bridge port is horizonal at the right of the bridge.

See Also:

Constant Field Values

VERTICAL_TOP

public static final int VERTICAL_TOP

Bridge port is vertical at the top of the bridge.

See Also:

Constant Field Values

VERTICAL_BOTTOM

public static final int VERTICAL_BOTTOM

Bridge port is vertical at the bottom of the bridge.

See Also:

Constant Field Values

DISABLED

public static final int DISABLED

Bridge port disabled state.

See Also:

Constant Field Values

LISTENING

public static final int LISTENING

Bridge port listening state.

See Also:

Constant Field Values

LEARNING

public static final int LEARNING

Bridge port learning state.

See Also:

Constant Field Values

FORWARDING

public static final int FORWARDING

Bridge port forwarding state.

See Also:

Constant Field Values

BLOCKING

public static final int BLOCKING

Bridge port blocking state.

See Also:

Constant Field Values

STATES

public static final java.lang.String[] STATES

The port states as strings.

MAX_ID

public static final int MAX_ID

Maximum bridge port ID.

See Also:

Constant Field Values

bridge

private Bridge bridge

The bridge this port is part of.

packets

private java.util.HashSet<Packet> packets

The packets on this bridge port.

lans

private java.util.HashSet<LAN> lans

The LANs connected to this bridge port.

bridgePorts

private java.util.HashSet<BridgePort> bridgePorts

The bridge ports connected to this brigde port.

x

private int x

The X co-ordinate position of this bridge port.

y

private int y

The Y co-ordinate position of this bridge port.

id

private int id

The ID of this bridge port. Negative if not connected to anything.

state

private int state

The state of this bridge port.

pathCost

private int pathCost

The path cost of this bridge port.

messageAgeTimer

public int messageAgeTimer

The message age timer.

forwardDelayTimer

public int forwardDelayTimer

The forward delay timer.

holdTimer

public int holdTimer

The hold timer.

designatedRoot

public int designatedRoot

The designated root on the LAN.

designatedBridge

public int designatedBridge

The designated bridge on the LAN.

designatedPort

public int designatedPort

The designated port on the LAN.

designatedCost

public int designatedCost

The designated cost on the LAN.

topologyChangeAcknowledge

public boolean topologyChangeAcknowledge

Topology change acknowledgement flag.

configPending

public boolean configPending

Configuration message pending flag.

Constructor Detail

BridgePort

public BridgePort(Bridge bridge,
                  int x,
                  int y)

Creates a new BridgePort.

Parameters:

bridge - The Bridge this port is part of.

x - The X co-ordinate position of this port.

y - The Y co-ordinate position of this port.

Method Detail

getX

public int getX()

Gets the X position of this port.

Returns:

The X co-ordinate position of this port.

getY

public int getY()

Gets the Y position of this port.

Returns:

The Y co-ordinate position of this port.

getXoffset

public int getXoffset()

Gets the X offset position of this port.

Returns:

The X co-ordinate offset from the bridge.

getYoffset

public int getYoffset()

Gets the Y offset position of this port.

Returns:

The Y co-ordinate offset from the bridge.

getType

public int getType()

Gets the type of this port.

Returns:

The type (based on the position around the bridge) of this port.

getID

public int getID()

Gets this bridge port's ID.

Returns:

The port ID.

setID

public void setID(int id)

Sets this bridge port's ID.

Parameters:

id - The new ID.

presetID

public void presetID(int id)

Presets this bridge port's ID (before it has been connected to anything).

Parameters:

id - The new ID.

getState

public int getState()

Gets the state of this bridge port.

Returns:

The current state of the bridge port.

setState

public void setState(int newState)

Sets the state of the bridge port.

Parameters:

newState - The new state of the bridge port.

getPathCost

public int getPathCost()

Gets the path cost of this bridge port.

Returns:

The path cost of the bridge port.

setPathCost

public void setPathCost(int pathCost)

Sets the path cost of this bridge port.

Parameters:

pathCost - The new path cost of the bridge port.

getBridge

public Bridge getBridge()

Gets the bridge this port is connected to.

Returns:

The Bridge this port is on.

isConnected

public boolean isConnected()

Find out if this bridge port is connected to any LANs or bridge ports.

Returns:

true if connected to something.

getLANs

public java.util.HashSet<LAN> getLANs()

Get all LANs connected to this bridge port.

Returns:

All connected LANs.

connect

public void connect(LAN l)

Connects to LAN.

Parameters:

l - The LAN to connect to.

isConnectedTo

public boolean isConnectedTo(LAN l)

Find out if this bridge port is connected to a LAN.

Parameters:

l - The LAN.

Returns:

true if connected to l.

disconnect

public void disconnect(LAN l)

Disconnects from a LAN.

Parameters:

l - The LAN to disconnect from.

getBridgePorts

public java.util.Vector<BridgePort> getBridgePorts()

Gets all bridge ports connected to this bridge port.

Returns:

All connected bridge ports.

connect

public void connect(BridgePort b)

Connects to a bridge port.

Parameters:

b - The BridgePort to connect to.

isConnectedTo

public boolean isConnectedTo(BridgePort b)

Find out if this bridge port is connected to another bridge port.

Parameters:

b - The other BridgePort.

Returns:

true if connected to b.

disconnect

public void disconnect(BridgePort b)

Disconnects from a bridge port.

Parameters:

b - The BridgePort to disconnect from.

disconnectAll

public void disconnectAll()

Disconnects from all LANs and bridge ports and removes all packets.

addPacket

public void addPacket(Packet p)

Adds a packet to this bridge port.

Specified by:

addPacket in interface PacketTransport

Parameters:

p - The Packet to add.

removePacket

public void removePacket(Packet p)

Removes a packet from this bridge port.

Specified by:

removePacket in interface PacketTransport

Parameters:

p - The Packet to remove.

getPackets

public java.util.Vector<Packet> getPackets()

Gets all the packets on this bridge port.

Returns:

The packets on this bridge port.

removeAllPackets

public void removeAllPackets()

Removes all packets from this bridge port.

processPacket

public java.util.Vector<Packet> processPacket(Packet p)

Processes a packet received by this bridge port.

Specified by:

processPacket in interface PacketDestination

Parameters:

p - The Packet to process.

Returns:

Any new packets that the processing caused.

checkConnect

private void checkConnect()

Check if the bridge is connected to anything and enable the port if possible.

checkDisconnect

private void checkDisconnect()

Check if the bridge is connected to anything and disable the port if neccessary.

enable

public void enable()

Enable the port (only if it is connected to something).

disable

public void disable()

Disable the port.