Class EthernetPacket

java.lang.Object

org.pcap4j.packet.AbstractPacket

org.pcap4j.packet.EthernetPacket

All Implemented Interfaces:

Serializable, Iterable<Packet>, Packet

public final class EthernetPacket
extends AbstractPacket

This Class handles from DA to data. Both preamble, SFD, and FCS are not contained.

Since:

pcap4j 0.9.1

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	EthernetPacket.Builder
static final class	EthernetPacket.EthernetHeader

Nested classes/interfaces inherited from class AbstractPacket

AbstractPacket.AbstractBuilder, AbstractPacket.AbstractHeader

Nested classes/interfaces inherited from interface Packet

Packet.Header

Field Summary

Fields

Modifier and Type	Field	Description
private final EthernetPacket.EthernetHeader	header
private static final int	MIN_ETHERNET_PAYLOAD_LENGTH
private final byte[]	pad
private final Packet	payload
private static final long	serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	EthernetPacket(byte[] rawData, int offset, int length)
private	EthernetPacket(EthernetPacket.Builder builder)

Method Summary

Modifier and Type	Method	Description
protected byte[]	buildRawData()	This method builds the value getRawData() will return by concatenating the header's raw data and the payload's raw data.
protected String	buildString()	This method builds the value toString() will return by concatenating the header's string representation and the payload's string representation.
protected int	calcHashCode()	This method calculates the value hashCode() will return using the header's hash code and the payload's hash code.
protected int	calcLength()	This method calculates the value length() will return by adding up the header length and the payload length.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
EthernetPacket.Builder	getBuilder()	Returns a new Builder object populated with this object's fields' values.
EthernetPacket.EthernetHeader	getHeader()	Returns the Header object representing this packet's header.
byte[]	getPad()
Packet	getPayload()	Returns the Packet object representing this packet's payload.
static EthernetPacket	newPacket(byte[] rawData, int offset, int length)	A static factory method.

Methods inherited from class AbstractPacket

buildHexString, contains, get, getOuterOf, getRawData, hashCode, iterator, length, toHexString, toString

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Iterable

forEach, spliterator

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

MIN_ETHERNET_PAYLOAD_LENGTH

private static final int MIN_ETHERNET_PAYLOAD_LENGTH

See Also:

• Constant Field Values

header

private final EthernetPacket.EthernetHeader header

payload

private final Packet payload

pad

private final byte[] pad

Constructor Details

EthernetPacket

private EthernetPacket(byte[] rawData,
 int offset,
 int length)
                throws IllegalRawDataException

Throws:

IllegalRawDataException

EthernetPacket

private EthernetPacket(EthernetPacket.Builder builder)

Method Details

newPacket

public static EthernetPacket newPacket(byte[] rawData,
 int offset,
 int length)
                                throws IllegalRawDataException

A static factory method. This method validates the arguments by ByteArrays.validateBounds(byte[], int, int), which may throw exceptions undocumented here.

Parameters:

rawData - rawData

offset - offset

length - length

Returns:

a new EthernetPacket object.

Throws:

IllegalRawDataException - if parsing the raw data fails.

getHeader

public EthernetPacket.EthernetHeader getHeader()

Description copied from class: AbstractPacket

Returns the Header object representing this packet's header. This subclass have to override this method if the packet represented by the subclass has a header.

Specified by:

getHeader in interface Packet

Overrides:

getHeader in class AbstractPacket

Returns:

the Header object representing this packet's header. May be null if the header doesn't exist

getPayload

public Packet getPayload()

Description copied from class: AbstractPacket

Returns the Packet object representing this packet's payload. This subclass have to override this method if the packet represented by the subclass has a payload.

Specified by:

getPayload in interface Packet

Overrides:

getPayload in class AbstractPacket

Returns:

the Packet object representing this packet's payload. May be null if the payload doesn't exist

getPad

public byte[] getPad()

Returns:

pad

calcLength

protected int calcLength()

Description copied from class: AbstractPacket

This method calculates the value length() will return by adding up the header length and the payload length. If you write this subclass which represents a packet with extra parts (e.g. a trailer), you need to override this method.

Overrides:

calcLength in class AbstractPacket

Returns:

a calculated length

buildRawData

protected byte[] buildRawData()

Description copied from class: AbstractPacket

This method builds the value getRawData() will return by concatenating the header's raw data and the payload's raw data. If you write this subclass which represents a packet with extra parts (e.g. a trailer), you need to override this method.

Overrides:

buildRawData in class AbstractPacket

Returns:

a raw data built

buildString

protected String buildString()

Description copied from class: AbstractPacket

This method builds the value toString() will return by concatenating the header's string representation and the payload's string representation. If you write this subclass which represents a packet with extra parts (e.g. a trailer), you need to override this method.

Overrides:

buildString in class AbstractPacket

Returns:

a string representation of this object

getBuilder

public EthernetPacket.Builder getBuilder()

Description copied from interface: Packet

Returns a new Builder object populated with this object's fields' values.

Specified by:

getBuilder in interface Packet

Specified by:

getBuilder in class AbstractPacket

Returns:

a new Builder object populated with this object's fields values

equals

public boolean equals(Object obj)

Description copied from class: AbstractPacket

Indicates whether some other object is "equal to" this one. This method firstly compares this packet's header using the header's equals(Object) method, then compares this packet's payload using the payload's equals(Object) method. If you write this subclass with fields which represent somethings other than header or payload, you need to override this method.

Overrides:

equals in class AbstractPacket

calcHashCode

protected int calcHashCode()

Description copied from class: AbstractPacket

This method calculates the value hashCode() will return using the header's hash code and the payload's hash code. If you write this subclass which represents a packet with extra parts (e.g. a trailer), you need to override this method.

Overrides:

calcHashCode in class AbstractPacket

Returns:

a calculated hash code value for the object