org.onlab.packet

Class TCP

java.lang.Object

org.onlab.packet.BasePacket

org.onlab.packet.TCP

All Implemented Interfaces:

IPacket

public class TCP
extends BasePacket

Implements TCP packet format.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	acknowledge
protected short	checksum
protected byte	dataOffset
protected short	destinationPort
protected short	flags
protected byte[]	options
protected int	sequence
protected short	sourcePort
protected short	urgentPointer
protected short	windowSize

Fields inherited from class org.onlab.packet.BasePacket

parent, payload

Constructor Summary

Constructors

Constructor and Description
TCP()

Method Summary

Modifier and Type	Method and Description
IPacket	deserialize(byte[] data, int offset, int length) Deserializes this packet layer and all possible payloads.
boolean	equals(Object obj)
int	getAcknowledge() Gets acknowledge number.
short	getChecksum() Gets checksum.
byte	getDataOffset() Gets offset.
short	getDestinationPort() Gets TCP destination port.
short	getFlags() Gets TCP flags.
byte[]	getOptions() Gets TCP options.
int	getSequence() Gets sequence number.
short	getSourcePort() Gets TCP source port.
short	getUrgentPointer() Gets urgent pointer.
short	getWindowSize() Gets TCP window size.
int	hashCode()
void	resetChecksum() Reset any checksums as needed, and call resetChecksum on all parents.
byte[]	serialize() Serializes the packet.
TCP	setAcknowledge(int ack) Sets acknowledge number.
TCP	setChecksum(short checksum) Sets checksum.
TCP	setDataOffset(byte offset) Sets offset.
TCP	setDestinationPort(short destinationPort) Sets TCP destination port.
TCP	setFlags(short flags) Sets TCP flags.
TCP	setOptions(byte[] options) Sets TCP options.
TCP	setSequence(int seq) Sets sequence number.
TCP	setSourcePort(short sourcePort) Sets TCP source port.
TCP	setUrgentPointer(short urgentPointer) Sets urgent pointer.
TCP	setWindowSize(short windowSize) Sets TCP window size.

Methods inherited from class org.onlab.packet.BasePacket

clone, getParent, getPayload, setParent, setPayload

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

sourcePort

protected short sourcePort

destinationPort

protected short destinationPort

sequence

protected int sequence

acknowledge

protected int acknowledge

dataOffset

protected byte dataOffset

flags

protected short flags

windowSize

protected short windowSize

checksum

protected short checksum

urgentPointer

protected short urgentPointer

options

protected byte[] options

Constructor Detail

TCP

public TCP()

Method Detail

getSourcePort

public short getSourcePort()

Gets TCP source port.

Returns:

TCP source port

setSourcePort

public TCP setSourcePort(short sourcePort)

Sets TCP source port.

Parameters:

sourcePort - the sourcePort to set

Returns:

this

getDestinationPort

public short getDestinationPort()

Gets TCP destination port.

Returns:

the destinationPort

setDestinationPort

public TCP setDestinationPort(short destinationPort)

Sets TCP destination port.

Parameters:

destinationPort - the destinationPort to set

Returns:

this

getChecksum

public short getChecksum()

Gets checksum.

Returns:

the checksum

setChecksum

public TCP setChecksum(short checksum)

Sets checksum.

Parameters:

checksum - the checksum to set

Returns:

this

getSequence

public int getSequence()

Gets sequence number.

Returns:

the sequence number

setSequence

public TCP setSequence(int seq)

Sets sequence number.

Parameters:

seq - the sequence number to set

Returns:

this

getAcknowledge

public int getAcknowledge()

Gets acknowledge number.

Returns:

the acknowledge number

setAcknowledge

public TCP setAcknowledge(int ack)

Sets acknowledge number.

Parameters:

ack - the acknowledge number to set

Returns:

this

getDataOffset

public byte getDataOffset()

Gets offset.

Returns:

the offset

setDataOffset

public TCP setDataOffset(byte offset)

Sets offset.

Parameters:

offset - the offset to set

Returns:

this

getFlags

public short getFlags()

Gets TCP flags.

Returns:

the TCP flags

setFlags

public TCP setFlags(short flags)

Sets TCP flags.

Parameters:

flags - the TCP flags to set

Returns:

this

getWindowSize

public short getWindowSize()

Gets TCP window size.

Returns:

the TCP window size

setWindowSize

public TCP setWindowSize(short windowSize)

Sets TCP window size.

Parameters:

windowSize - the TCP window size to set

Returns:

this

resetChecksum

public void resetChecksum()

Description copied from interface: IPacket

Reset any checksums as needed, and call resetChecksum on all parents.

Specified by:

resetChecksum in interface IPacket

Overrides:

resetChecksum in class BasePacket

getUrgentPointer

public short getUrgentPointer()

Gets urgent pointer.

Returns:

the urgent pointer

setUrgentPointer

public TCP setUrgentPointer(short urgentPointer)

Sets urgent pointer.

Parameters:

urgentPointer - the urgent pointer to set

Returns:

this

getOptions

public byte[] getOptions()

Gets TCP options.

Returns:

the TCP options

setOptions

public TCP setOptions(byte[] options)

Sets TCP options.

Parameters:

options - the options to set

Returns:

this

serialize

public byte[] serialize()

Serializes the packet. Will compute and set the following fields if they are set to specific values at the time serialize is called: -checksum : 0 -length : 0

Returns:

a byte[] containing this packet and payloads

hashCode

public int hashCode()

Overrides:

hashCode in class BasePacket

equals

public boolean equals(Object obj)

Overrides:

equals in class BasePacket

deserialize

public IPacket deserialize(byte[] data,
                           int offset,
                           int length)

Description copied from interface: IPacket

Deserializes this packet layer and all possible payloads.

Parameters:

data - bytes to deserialize

offset - offset to start deserializing from

length - length of the data to deserialize

Returns:

the deserialized data