Class AbstractPppPacket.AbstractPppHeader

java.lang.Object

org.pcap4j.packet.AbstractPacket.AbstractHeader

org.pcap4j.packet.AbstractPppPacket.AbstractPppHeader

All Implemented Interfaces:

Serializable, Packet.Header

Direct Known Subclasses:

HdlcPppPacket.HdlcPppHeader, PppPacket.PppHeader

Enclosing class:

AbstractPppPacket

abstract static class AbstractPppPacket.AbstractPppHeader
extends AbstractPacket.AbstractHeader

Since:

pcap4j 1.4.0

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	PPP_HEADER_SIZE
private final PppDllProtocol	protocol
private static final int	PROTOCOL_OFFSET
private static final int	PROTOCOL_SIZE
private static final long	serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractPppHeader(byte[] rawData, int offset, int length)
protected	AbstractPppHeader(AbstractPppPacket.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().
PppDllProtocol	getProtocol()
protected List<byte[]>	getRawFields()	Returns a list of byte arrays which represents this header's fields.
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

PROTOCOL_OFFSET

private static final int PROTOCOL_OFFSET

See Also:

• Constant Field Values

PROTOCOL_SIZE

private static final int PROTOCOL_SIZE

See Also:

• Constant Field Values

PPP_HEADER_SIZE

static final int PPP_HEADER_SIZE

See Also:

• Constant Field Values

protocol

private final PppDllProtocol protocol

Constructor Details

AbstractPppHeader

protected AbstractPppHeader(byte[] rawData,
 int offset,
 int length)
                     throws IllegalRawDataException

Throws:

IllegalRawDataException

AbstractPppHeader

protected AbstractPppHeader(AbstractPppPacket.Builder builder)

Method Details

getProtocol

public PppDllProtocol getProtocol()

Returns:

protocol

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