org.jnetpcap.protocol.vpn
Class L2TP

java.lang.Object
  org.jnetpcap.nio.JMemory
      org.jnetpcap.nio.JBuffer
          org.jnetpcap.packet.JHeader
              org.jnetpcap.protocol.vpn.L2TP

All Implemented Interfaces:

JByteBuffer, JPayloadAccessor

@Header
public class L2TP
extends JHeader

Layer 2 Tunneling Protocol header definition

Author:

Mark Bednarczyk, Sly Technologies, Inc.

Nested Class Summary

Nested classes/interfaces inherited from class org.jnetpcap.packet.JHeader

JHeader.State

Nested classes/interfaces inherited from class org.jnetpcap.nio.JMemory

JMemory.Type

Field Summary

static int	FLAG_L
static int	FLAG_O
static int	FLAG_P
static int	FLAG_S
static int	FLAG_T
static int	ID
static int	MASK_FLAGS
static int	MASK_VERSION

Fields inherited from class org.jnetpcap.packet.JHeader

annotatedHeader, EMPTY_HEADER_ARRAY, isSubHeader, packet, state

Fields inherited from class org.jnetpcap.nio.JMemory

JNETPCAP_LIBRARY_NAME

Constructor Summary

L2TP()

Method Summary

void	decodeHeader() Allows a header to decode its complex fields
int	flags()
boolean	hasLength()
boolean	hasN()
boolean	hasOffset()
static int	headerLength(JBuffer buffer, int offset)
int	length()
int	lengthOffset()
int	nr()
int	nrOffset()
int	ns()
int	nsOffset()
int	offset()
int	offsetOffset()
int	pad()
int	padOffset()
int	sessionId()
int	sessionIdOffset()
int	tunnelId()
int	tunnelIdOffset()
int	version()

Methods inherited from class org.jnetpcap.packet.JHeader

addAnalysis, decode, getAnalysis, getAnalysisIterable, getAnnotatedHeader, getDescription, getFields, getId, getLength, getName, getNicname, getOffset, getPacket, getParent, getPayload, getState, getSubHeaders, getType, hasAnalysis, hasAnalysis, hasAnalysis, hasDescription, hasSubHeaders, peer, peer, peerPayloadTo, setPacket, setSubHeaders, sizeof, toString, transferPayloadTo, transferPayloadTo, transferPayloadTo, validateHeader

Methods inherited from class org.jnetpcap.nio.JBuffer

findUTF8String, getByte, getByteArray, getByteArray, getDouble, getFloat, getInt, getLong, getShort, getUByte, getUInt, getUShort, getUTF8Char, getUTF8String, getUTF8String, getUTF8String, getUTF8String, isReadonly, order, order, peer, peer, peer, peer, setByte, setByteArray, setByteBuffer, setDouble, setFloat, setInt, setLong, setShort, setUByte, setUInt, setUShort, transferFrom, transferFrom, transferFrom, transferTo, transferTo, transferTo

Methods inherited from class org.jnetpcap.nio.JMemory

check, cleanup, finalize, isInitialized, isJMemoryBasedOwner, isOwner, peer, setSize, size, toDebugString, toHexdump, toHexdump, totalActiveAllocated, totalAllocateCalls, totalAllocated, totalAllocatedSegments0To255Bytes, totalAllocatedSegments256OrAbove, totalDeAllocateCalls, totalDeAllocated, transferFrom, transferFrom, transferFromDirect, transferOwnership, transferTo, transferTo, transferTo, transferTo, transferTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jnetpcap.nio.JByteBuffer

size

Field Detail

FLAG_L

public static final int FLAG_L

See Also:

Constant Field Values

FLAG_O

public static final int FLAG_O

See Also:

Constant Field Values

FLAG_P

public static final int FLAG_P

See Also:

Constant Field Values

FLAG_S

public static final int FLAG_S

See Also:

Constant Field Values

FLAG_T

public static final int FLAG_T

See Also:

Constant Field Values

ID

public static final int ID

See Also:

Constant Field Values

MASK_VERSION

public static final int MASK_VERSION

See Also:

Constant Field Values

MASK_FLAGS

public static final int MASK_FLAGS

See Also:

Constant Field Values

Constructor Detail

L2TP

public L2TP()

Method Detail

headerLength

@HeaderLength
public static int headerLength(JBuffer buffer,
                                            int offset)

decodeHeader

public void decodeHeader()

Description copied from class: JHeader

Allows a header to decode its complex fields

Overrides:

decodeHeader in class JHeader

flags

@Field(offset=0,
       length=12,
       format="%x")
public int flags()

hasLength

@Dynamic(value=CHECK)
public boolean hasLength()

hasN

@Dynamic(value=CHECK)
public boolean hasN()

hasOffset

@Dynamic(value=CHECK)
public boolean hasOffset()

lengthOffset

@Dynamic(value=OFFSET)
public int lengthOffset()

length

@Field(length=16)
public int length()

nrOffset

@Dynamic(value=OFFSET)
public int nrOffset()

nr

@Field(length=16)
public int nr()

nsOffset

@Dynamic(value=OFFSET)
public int nsOffset()

ns

@Field(length=16)
public int ns()

offsetOffset

@Dynamic(value=OFFSET)
public int offsetOffset()

offset

@Field(length=16)
public int offset()

padOffset

@Dynamic(value=OFFSET)
public int padOffset()

pad

@Field(length=16)
public int pad()

sessionIdOffset

@Dynamic(value=OFFSET)
public int sessionIdOffset()

sessionId

@Field(length=16)
public int sessionId()

tunnelIdOffset

@Dynamic(value=OFFSET)
public int tunnelIdOffset()

tunnelId

@Field(length=16)
public int tunnelId()

version

@Field(offset=13,
       length=3)
public int version()