org.jnetpcap.protocol.lan
Class IEEE802dot3

java.lang.Object
  org.jnetpcap.nio.JMemory
      org.jnetpcap.nio.JBuffer
          org.jnetpcap.packet.JHeader
              org.jnetpcap.protocol.lan.IEEE802dot3

All Implemented Interfaces:

JPayloadAccessor

@Header(length=14,
        dlt=IEEE802)
public class IEEE802dot3
extends JHeader

IEEE 802.3 data link 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

ID The Constant ID.

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

IEEE802dot3()

Method Summary

long	calculateChecksum() Calculates a checksum using protocol specification for a header.
long	checksum() Retrieves the header's checksum.
boolean	checksumCheck() Checks if FCS is available for this Ethernet frame.
java.lang.String	checksumDescription() Checksum description.
int	checksumOffset() Calculates the offset of the FCS field within the Ethernet frame.
byte[]	destination() Destination.
void	destination(byte[] array) Destination.
byte[]	destinationToByteArray(byte[] array) Destination to byte array.
int	length() Length.
void	length(int len) Length.
byte[]	source() Source.
void	source(byte[] array) Source.
byte[]	sourceToByteArray(byte[] array) Source to byte array.

Methods inherited from class org.jnetpcap.packet.JHeader

decode, decodeHeader, 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

ID

public static final int ID

The Constant ID.

See Also:

Constant Field Values

Constructor Detail

IEEE802dot3

public IEEE802dot3()

Method Detail

destination

@Field(offset=0,
       length=48,
       format="#mac#")
public byte[] destination()

Destination.

Returns:

the byte[]

destinationToByteArray

public byte[] destinationToByteArray(byte[] array)

Destination to byte array.

Parameters:

array - the array

Returns:

the byte[]

destination

public void destination(byte[] array)

Destination.

Parameters:

array - the array

source

@Field(offset=48,
       length=48,
       format="#mac#")
public byte[] source()

Source.

Returns:

the byte[]

source

public void source(byte[] array)

Source.

Parameters:

array - the array

sourceToByteArray

public byte[] sourceToByteArray(byte[] array)

Source to byte array.

Parameters:

array - the array

Returns:

the byte[]

length

@Field(offset=96,
       length=16,
       format="%d")
public int length()

Length.

Returns:

the int

length

public void length(int len)

Length.

Parameters:

len - the len

checksumCheck

@Dynamic(field="checksum",
         value=CHECK)
public boolean checksumCheck()

Checks if FCS is available for this Ethernet frame. FCS is typically stripped by the OS and not provided to Libpcap/jNetPcap on most platforms.

Returns:

true if FCS is present, otherwise false

checksumOffset

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

Calculates the offset of the FCS field within the Ethernet frame.

Returns:

offset, in bits, from the start of the packet buffer

checksumDescription

@Dynamic(value=DESCRIPTION)
public java.lang.String checksumDescription()

Checksum description.

Returns:

the string

checksum

@Field(length=32,
       format="%x",
       display="FCS")
public long checksum()

Retrieves the header's checksum.

Returns:

header's stored checksum

calculateChecksum

public long calculateChecksum()

Calculates a checksum using protocol specification for a header. Checksums for partial headers or fragmented packets (unless the protocol allows it) are not calculated.

Returns:

header's calculated checksum