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:

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 The Constant FLAG_L.
static int	FLAG_O The Constant FLAG_O.
static int	FLAG_P The Constant FLAG_P.
static int	FLAG_S The Constant FLAG_S.
static int	FLAG_T The Constant FLAG_T.
static int	ID The Constant ID.
static int	MASK_FLAGS The Constant MASK_FLAGS.
static int	MASK_VERSION The Constant MASK_VERSION.

Fields inherited from class org.jnetpcap.packet.JHeader

annotatedHeader, BYTE, EMPTY_HEADER_ARRAY, isSubHeader, packet, state

Fields inherited from class org.jnetpcap.nio.JMemory

JNETPCAP_LIBRARY_NAME, MAX_DIRECT_MEMORY_DEFAULT, POINTER

Constructor Summary

L2TP()

Method Summary

void	decodeHeader() Decode header.
int	flags() Flags.
boolean	hasLength() Checks for length.
boolean	hasN() Checks for n.
boolean	hasOffset() Checks for offset.
static int	headerLength(JBuffer buffer, int offset) Header length.
int	length() Length.
int	lengthOffset() Length offset.
int	nr() Nr.
int	nrOffset() Nr offset.
int	ns() Ns.
int	nsOffset() Ns offset.
int	offset() Offset.
int	offsetOffset() Offset offset.
int	pad() Pad.
int	padOffset() Pad offset.
int	sessionId() Session id.
int	sessionIdOffset() Session id offset.
int	tunnelId() Tunnel id.
int	tunnelIdOffset() Tunnel id offset.
int	version() Version.

Methods inherited from class org.jnetpcap.packet.JHeader

decode, getAnnotatedHeader, getDescription, getFields, getGap, getGapLength, getGapOffset, getHeader, getHeaderLength, getHeaderOffset, getId, getIndex, getLength, getName, getNextHeaderId, getNextHeaderOffset, getNicname, getOffset, getPacket, getParent, getPayload, getPayloadLength, getPayloadOffset, getPostfix, getPostfixLength, getPostfixOffset, getPrefix, getPrefixLength, getPrefixOffset, getPreviousHeaderId, getPreviousHeaderOffset, getState, getSubHeaders, hasDescription, hasGap, hasNextHeader, hasPayload, hasPostfix, hasPrefix, hasPreviousHeader, hasSubHeaders, isFragmented, isGapTruncated, isHeaderTruncated, isPayloadTruncated, isPostfixTruncated, isPrefixTruncated, peer, peer, peerPayloadTo, setPacket, setSubHeaders, sizeof, toString, transferPayloadTo, transferPayloadTo, transferPayloadTo, validateHeader

Methods inherited from class org.jnetpcap.nio.JBuffer

findUTF8String, getByte, getByteArray, 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, setShort0, setUByte, setUInt, setUShort, transferFrom, transferFrom, transferFrom, transferTo, transferTo, transferTo

Methods inherited from class org.jnetpcap.nio.JMemory

availableDirectMemory, check, cleanup, createReference, isInitialized, isJMemoryBasedOwner, isOwner, maxDirectMemory, peer, reservedDirectMemory, setSize, size, softDirectMemory, toDebugString, toHexdump, toHexdump, totalActiveAllocated, totalAllocateCalls, totalAllocated, totalAllocatedSegments0To255Bytes, totalAllocatedSegments256OrAbove, totalDeAllocateCalls, totalDeAllocated, transferFrom, transferFrom, transferFromDirect, transferOwnership, transferTo, transferTo, transferTo, transferTo, transferTo, transferTo0

Methods inherited from class java.lang.Object

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

Field Detail

FLAG_L

public static final int FLAG_L

The Constant FLAG_L.

See Also:

Constant Field Values

FLAG_O

public static final int FLAG_O

The Constant FLAG_O.

See Also:

Constant Field Values

FLAG_P

public static final int FLAG_P

The Constant FLAG_P.

See Also:

Constant Field Values

FLAG_S

public static final int FLAG_S

The Constant FLAG_S.

See Also:

Constant Field Values

FLAG_T

public static final int FLAG_T

The Constant FLAG_T.

See Also:

Constant Field Values

ID

public static final int ID

The Constant ID.

See Also:

Constant Field Values

MASK_VERSION

public static final int MASK_VERSION

The Constant MASK_VERSION.

See Also:

Constant Field Values

MASK_FLAGS

public static final int MASK_FLAGS

The Constant MASK_FLAGS.

See Also:

Constant Field Values

Constructor Detail

L2TP

public L2TP()

Method Detail

headerLength

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

Header length.

Parameters:

buffer - the buffer

offset - the offset

Returns:

the int

decodeHeader

public void decodeHeader()

Decode header.

Overrides:

decodeHeader in class JHeader

See Also:

JHeader.decodeHeader()

flags

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

Flags.

Returns:

the int

hasLength

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

Checks for length.

Returns:

true, if successful

hasN

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

Checks for n.

Returns:

true, if successful

hasOffset

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

Checks for offset.

Returns:

true, if successful

lengthOffset

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

Length offset.

Returns:

the int

length

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

Length.

Returns:

the int

nrOffset

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

Nr offset.

Returns:

the int

nr

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

Nr.

Returns:

the int

nsOffset

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

Ns offset.

Returns:

the int

ns

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

Ns.

Returns:

the int

offsetOffset

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

Offset offset.

Returns:

the int

offset

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

Offset.

Returns:

the int

padOffset

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

Pad offset.

Returns:

the int

pad

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

Pad.

Returns:

the int

sessionIdOffset

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

Session id offset.

Returns:

the int

sessionId

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

Session id.

Returns:

the int

tunnelIdOffset

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

Tunnel id offset.

Returns:

the int

tunnelId

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

Tunnel id.

Returns:

the int

version

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

Version.

Returns:

the int