jist.swans.trans
Class TransTcp

java.lang.Object
  jist.swans.trans.TransTcp

All Implemented Interfaces:

JistAPI.Proxiable, JistAPI.Timeless, NetInterface.NetHandler, TransInterface, TransInterface.TransTcpInterface

public class TransTcp
extends java.lang.Object
implements TransInterface.TransTcpInterface

Implementation of TCP Transport Layer.

Since:

SWANS1.0

Version:

$Id: TransTcp.java,v 1.49 2004/04/06 16:07:51 barr Exp $

Author:

Kelwin Tamtoro <kt222@cs.cornell.edu>, Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

static class	TransTcp.TcpMessage Data structure for TCP Message.
static class	TransTcp.TcpOptions Implementation for TCP Options.

Nested classes/interfaces inherited from interface jist.swans.trans.TransInterface

TransInterface.SocketHandler, TransInterface.TransMessage, TransInterface.TransTcpInterface, TransInterface.TransUdpInterface

Field Summary

private static int	DROP_PROBABILITY probability (in percent) that a message will not be sent
private java.util.HashMap	handlers Hashmap to hold references to socket callbacks.
private NetInterface	netEntity Entity reference to network layer.
private TransInterface.TransTcpInterface	self Entity reference to itself.

Constructor Summary

TransTcp()
Constructor.

Method Summary

void	addSocketHandler(int port, TransInterface.SocketHandler socketCallback) Register socket handler.
boolean	checkSocketHandler(int port) Return whether socket bound to port.
void	delSocketHandler(int port) Unregister socket handler.
TransInterface.TransTcpInterface	getProxy() Returns an entity reference to this object.
void	receive(Message msg, NetAddress src, MacAddress lastHop, byte macId, NetAddress dst, byte priority, byte ttl) Receive a message from network layer.
void	send(Message msg, NetAddress dst, int dstPort, int srcPort, byte priority) Send message (from APPLICATON).
void	setNetEntity(NetInterface netEntity) Sets the reference to the network layer.

Methods inherited from class java.lang.Object

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

Field Detail

DROP_PROBABILITY

private static final int DROP_PROBABILITY

probability (in percent) that a message will not be sent. (0 --> no packets are dropped; 100 --> no packets are transmitted)

See Also:

Constant Field Values

self

private TransInterface.TransTcpInterface self

Entity reference to itself.

netEntity

private NetInterface netEntity

Entity reference to network layer.

handlers

private java.util.HashMap handlers

Hashmap to hold references to socket callbacks.

Constructor Detail

TransTcp

public TransTcp()

Constructor.

Method Detail

getProxy

public TransInterface.TransTcpInterface getProxy()

Returns an entity reference to this object.

Returns:

entity reference to TransTcp itself

setNetEntity

public void setNetEntity(NetInterface netEntity)

Sets the reference to the network layer.

Parameters:

netEntity - entity reference to network layer

addSocketHandler

public void addSocketHandler(int port,
                             TransInterface.SocketHandler socketCallback)

Register socket handler.

Specified by:

addSocketHandler in interface TransInterface

Parameters:

port - bound socket port

socketCallback - callback handler

delSocketHandler

public void delSocketHandler(int port)

Unregister socket handler.

Specified by:

delSocketHandler in interface TransInterface

Parameters:

port - bound socket port

checkSocketHandler

public boolean checkSocketHandler(int port)

Return whether socket bound to port.

Specified by:

checkSocketHandler in interface TransInterface.TransTcpInterface

Parameters:

port - port to check

Returns:

whether socket bound to port

receive

public void receive(Message msg,
                    NetAddress src,
                    MacAddress lastHop,
                    byte macId,
                    NetAddress dst,
                    byte priority,
                    byte ttl)

Receive a message from network layer.

Specified by:

receive in interface NetInterface.NetHandler

Parameters:

msg - message received

src - source network address

lastHop - source link address

macId - incoming interface

dst - destination network address

priority - packet priority

ttl - packet time-to-live

send

public void send(Message msg,
                 NetAddress dst,
                 int dstPort,
                 int srcPort,
                 byte priority)

Send message (from APPLICATON).

Specified by:

send in interface TransInterface

Parameters:

msg - packet payload (usually from application layer)

dst - packet destination address

dstPort - packet destination port

srcPort - packet source port

priority - packet priority