jist.swans.mac
Class MacMessage

java.lang.Object
  jist.swans.mac.MacMessage

All Implemented Interfaces:

JistAPI.Timeless, Message

Direct Known Subclasses:

MacMessage.Ack, MacMessage.Cts, MacMessage.Data, MacMessage.Rts

public abstract class MacMessage
extends java.lang.Object
implements Message

Defines the various message used by the Mac entity.

Since:

SWANS1.0

Version:

$Id: MacMessage.java,v 1.17 2005/03/13 16:11:55 barr Exp $

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

static class	MacMessage.Ack An 802_11 Acknowlege packet.
static class	MacMessage.Cts An 802_11 Clear-To-Send packet.
static class	MacMessage.Data An 802_11 Data packet.
static class	MacMessage.Rts An 802_11 Request-To-Send packet.

Field Summary

private boolean	retry packet retry bit.
private byte	type packet type.
static byte	TYPE_ACK ACK packet constant: type = 01, subtype = 1101.
static byte	TYPE_CTS CTS packet constant: type = 01, subtype = 1100.
static byte	TYPE_DATA DATA packet constant: type = 10, subtype = 0000.
static byte	TYPE_RTS RTS packet constant: type = 01, subtype = 1011.

Fields inherited from interface jist.swans.misc.Message

NULL

Constructor Summary

protected

MacMessage(byte type, boolean retry) Create a mac packet.

Method Summary

abstract MacAddress	getDst() Return packet destination address.
abstract int	getDuration() Return packet transmission duration.
boolean	getRetry() Return retry bit.
byte	getType() Return packet type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface jist.swans.misc.Message

getBytes, getSize

Field Detail

TYPE_RTS

public static final byte TYPE_RTS

RTS packet constant: type = 01, subtype = 1011.

See Also:

Constant Field Values

TYPE_CTS

public static final byte TYPE_CTS

CTS packet constant: type = 01, subtype = 1100.

See Also:

Constant Field Values

TYPE_ACK

public static final byte TYPE_ACK

ACK packet constant: type = 01, subtype = 1101.

See Also:

Constant Field Values

TYPE_DATA

public static final byte TYPE_DATA

DATA packet constant: type = 10, subtype = 0000.

See Also:

Constant Field Values

type

private byte type

packet type.

retry

private boolean retry

packet retry bit.

Constructor Detail

MacMessage

protected MacMessage(byte type,
                     boolean retry)

Create a mac packet.

Parameters:

type - packet type

retry - packet retry bit

Method Detail

getType

public byte getType()

Return packet type.

Returns:

packet type

getRetry

public boolean getRetry()

Return retry bit.

Returns:

retry bit

getDst

public abstract MacAddress getDst()

Return packet destination address.

Returns:

packet destination address

getDuration

public abstract int getDuration()

Return packet transmission duration.

Returns:

packet transmission duration