nl.sidnlabs.pcap.decoder

Class TCPDecoder

java.lang.Object

nl.sidnlabs.pcap.decoder.TCPDecoder

public class TCPDecoder
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static byte[]	EMPTY_PAYLOAD
protected com.google.common.collect.Multimap<TCPFlow,SequencePayload>	flows
protected com.google.common.collect.Multimap<TCPFlow,Long>	flowseq
static int	PROTOCOL_HEADER_TCP_ACK_OFFSET
static int	PROTOCOL_HEADER_TCP_SEQ_OFFSET
static int	PROTOCOL_HEADER_WINDOW_SIZE_OFFSET
static int	TCP_HEADER_DATA_OFFSET

Constructor Summary

Constructors

Constructor and Description
TCPDecoder()

Method Summary

Modifier and Type	Method and Description
byte[]	decode(Packet packet, byte[] packetData, int ipStart, int ipHeaderLen, int totalLength)
byte[]	reassemble(Packet packet, int ipHeaderLen, int totalLength, int ipStart, byte[] packetData) decode the packetdata

Methods inherited from class java.lang.Object

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

Field Detail

PROTOCOL_HEADER_TCP_SEQ_OFFSET

public static final int PROTOCOL_HEADER_TCP_SEQ_OFFSET

See Also:

Constant Field Values

PROTOCOL_HEADER_TCP_ACK_OFFSET

public static final int PROTOCOL_HEADER_TCP_ACK_OFFSET

See Also:

Constant Field Values

TCP_HEADER_DATA_OFFSET

public static final int TCP_HEADER_DATA_OFFSET

See Also:

Constant Field Values

PROTOCOL_HEADER_WINDOW_SIZE_OFFSET

public static final int PROTOCOL_HEADER_WINDOW_SIZE_OFFSET

See Also:

Constant Field Values

EMPTY_PAYLOAD

public static final byte[] EMPTY_PAYLOAD

flows

protected com.google.common.collect.Multimap<TCPFlow,SequencePayload> flows

flowseq

protected com.google.common.collect.Multimap<TCPFlow,Long> flowseq

Constructor Detail

TCPDecoder

public TCPDecoder()

Method Detail

decode

public byte[] decode(Packet packet,
                     byte[] packetData,
                     int ipStart,
                     int ipHeaderLen,
                     int totalLength)

reassemble

public byte[] reassemble(Packet packet,
                         int ipHeaderLen,
                         int totalLength,
                         int ipStart,
                         byte[] packetData)

decode the packetdata

Parameters:

packet -

ipHeaderLen -

totalLength -

ipStart -

packetData -

Returns:

payload bytes or null if not a valid packet