Class EthernetPacket.EthernetHeader

java.lang.Object

org.pcap4j.packet.AbstractPacket.AbstractHeader

org.pcap4j.packet.EthernetPacket.EthernetHeader

All Implemented Interfaces:

Serializable, Packet.Header

Enclosing class:

EthernetPacket

public static final class EthernetPacket.EthernetHeader
extends AbstractPacket.AbstractHeader

Since:

pcap4j 0.9.1

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	DST_ADDR_OFFSET
private static final int	DST_ADDR_SIZE
private final MacAddress	dstAddr
private static final int	ETHERNET_HEADER_SIZE
private static final long	serialVersionUID
private static final int	SRC_ADDR_OFFSET
private static final int	SRC_ADDR_SIZE
private final MacAddress	srcAddr
private final EtherType	type
private static final int	TYPE_OFFSET
private static final int	TYPE_SIZE

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected String	buildString()	This method builds the value toString() will return.
protected int	calcHashCode()	This method builds the value hashCode() will return using the byte array getRawData() returns.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one using return values of getRawData().
MacAddress	getDstAddr()
protected List<byte[]>	getRawFields()	Returns a list of byte arrays which represents this header's fields.
MacAddress	getSrcAddr()
EtherType	getType()
int	length()	Returns the header length in bytes.

Methods inherited from class AbstractPacket.AbstractHeader

buildHexString, buildRawData, calcLength, getRawData, hashCode, toHexString, toString

Methods inherited from class Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

DST_ADDR_OFFSET

private static final int DST_ADDR_OFFSET

See Also:

• Constant Field Values

DST_ADDR_SIZE

private static final int DST_ADDR_SIZE

See Also:

• Constant Field Values

SRC_ADDR_OFFSET

private static final int SRC_ADDR_OFFSET

See Also:

• Constant Field Values

SRC_ADDR_SIZE

private static final int SRC_ADDR_SIZE

See Also:

• Constant Field Values

TYPE_OFFSET

private static final int TYPE_OFFSET

See Also:

• Constant Field Values

TYPE_SIZE

private static final int TYPE_SIZE

See Also:

• Constant Field Values

ETHERNET_HEADER_SIZE

private static final int ETHERNET_HEADER_SIZE

See Also:

• Constant Field Values

dstAddr

private final MacAddress dstAddr

srcAddr

private final MacAddress srcAddr

type

private final EtherType type

Constructor Details

EthernetHeader

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

Throws:

IllegalRawDataException

EthernetHeader

private EthernetHeader(EthernetPacket.Builder builder)

Method Details

getDstAddr

public MacAddress getDstAddr()

Returns:

dstAddr

getSrcAddr

public MacAddress getSrcAddr()

Returns:

srcAddr

getType

public EtherType getType()

Returns:

type

getRawFields

protected List<byte[]> getRawFields()

Description copied from class: AbstractPacket.AbstractHeader

Returns a list of byte arrays which represents this header's fields. This method is called by calcLength() and buildRawData().

Specified by:

getRawFields in class AbstractPacket.AbstractHeader

Returns:

a list of byte arrays which represents this header's fields

length

public int length()

Description copied from class: AbstractPacket.AbstractHeader

Returns the header length in bytes. This method calls calcLength() and caches the return value when it is called for the first time, and then, this method returns the cached value from the second time.

Specified by:

length in interface Packet.Header

Overrides:

length in class AbstractPacket.AbstractHeader

Returns:

the length of the byte stream of the header represented by this object in bytes

buildString

protected String buildString()

Description copied from class: AbstractPacket.AbstractHeader

This method builds the value toString() will return.

Overrides:

buildString in class AbstractPacket.AbstractHeader

Returns:

a string representation of this object

equals

public boolean equals(Object obj)

Description copied from class: AbstractPacket.AbstractHeader

Indicates whether some other object is "equal to" this one using return values of getRawData(). This method should be overridden so that it does more strict comparisons more efficiently.

Overrides:

equals in class AbstractPacket.AbstractHeader

calcHashCode

protected int calcHashCode()

Description copied from class: AbstractPacket.AbstractHeader

This method builds the value hashCode() will return using the byte array getRawData() returns. This method may be better to be overridden for performance reason.

Overrides:

calcHashCode in class AbstractPacket.AbstractHeader

Returns:

a calculated hash code value for the object