net.clackrouter.component.tcp
Class SendWindowCheck

java.lang.Object
  net.clackrouter.component.base.ClackComponent
      net.clackrouter.component.tcp.SendWindowCheck

All Implemented Interfaces:

Alarm

public class SendWindowCheck
extends ClackComponent

Class that monitors the sending of TCP data segments, and makes sure it is within the valid sending window.

Since congestion control is not currently implemented, this window is a static size.

Nested Class Summary

Nested classes/interfaces inherited from class net.clackrouter.component.base.ClackComponent

ClackComponent.Waiter

Field Summary

static int	NUM_PORTS
static int	PORT_APP_IN
static int	PORT_NET_OUT

Fields inherited from class net.clackrouter.component.base.ClackComponent

componentCell, m_has_error, m_log, m_name, m_num_ports, m_packetcount_in, m_packetcount_out, m_ports, mListeners, mRouter, pendingError, SIGNAL_ERROR_LEN_MSEC, UNIQUE_COUNT, view

Constructor Summary

SendWindowCheck(TCB t, Router router, java.lang.String name)

Method Summary

void	app_close_request() Used to notify the TCP stack that the application has called close on the socket.
void	poll() Checks to see if the component can send any data right now, and if data exists and the window and TCP state allows, this data is sent.
void	send_empty_packet(int flags) Creates and sends a packet with no data
protected void	setupPorts(int numports) Allocates an array of ClackPort objects to be used by this component

Methods inherited from class net.clackrouter.component.base.ClackComponent

acceptPacket, createCopy, createInputPullPort, createInputPushPort, createOutputPullPort, createOutputPushPort, error, fireListeners, getColor, getComponentCell, getHierarchicalView, getLog, getName, getNumPorts, getPacketCountIn, getPacketCountOut, getPendingError, getPort, getPropertiesView, getRouter, getSerializableProperties, getTime, getTypeName, getUniqueCount, getView, handlePullRequest, hasError, initializeProperties, isHierarchical, isModifying, log, notifyAlarm, registerListener, sendOutPort, setAlarm, setComponentCell, setName, setPendingError, setView, showErrorDialog, signalError, try_repaint, unregisterListener

Methods inherited from class java.lang.Object

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

Field Detail

PORT_NET_OUT

public static final int PORT_NET_OUT

See Also:

Constant Field Values

PORT_APP_IN

public static final int PORT_APP_IN

See Also:

Constant Field Values

NUM_PORTS

public static final int NUM_PORTS

See Also:

Constant Field Values

Constructor Detail

SendWindowCheck

public SendWindowCheck(TCB t,
                       Router router,
                       java.lang.String name)

Method Detail

setupPorts

protected void setupPorts(int numports)

Description copied from class: ClackComponent

Allocates an array of ClackPort objects to be used by this component

Overrides:

setupPorts in class ClackComponent

Parameters:

numports - the number of ports to create

poll

public void poll()

Checks to see if the component can send any data right now, and if data exists and the window and TCP state allows, this data is sent.

Overrides:

poll in class ClackComponent

send_empty_packet

public void send_empty_packet(int flags)

Creates and sends a packet with no data

Parameters:

flags - header flags for this packet

app_close_request

public void app_close_request()

Used to notify the TCP stack that the application has called close on the socket.