Package net.i2p.data.i2np

Class DataMessage

java.lang.Object

net.i2p.data.i2np.I2NPMessageImpl

net.i2p.data.i2np.FastI2NPMessageImpl

net.i2p.data.i2np.DataMessage

All Implemented Interfaces:

I2NPMessage

public class DataMessage
extends FastI2NPMessageImpl

Defines a message containing arbitrary bytes of data This is what goes in a GarlicClove. It was also previously used for generating test messages.

Author:

jrandom

Nested Class Summary

Nested classes/interfaces inherited from class net.i2p.data.i2np.I2NPMessageImpl

I2NPMessageImpl.Builder

Field Summary

Fields

Modifier and Type	Field	Description
static int	MESSAGE_TYPE

Fields inherited from class net.i2p.data.i2np.FastI2NPMessageImpl

_checksum, _hasChecksum

Fields inherited from class net.i2p.data.i2np.I2NPMessageImpl

_context, _expiration, _log, CHECKSUM_LENGTH, DEFAULT_EXPIRATION_MS, HEADER_LENGTH

Fields inherited from interface net.i2p.data.i2np.I2NPMessage

MAX_ID_VALUE, MAX_SIZE

Constructor Summary

Constructors

Constructor	Description
DataMessage(I2PAppContext context)

Method Summary

Modifier and Type	Method	Description
protected int	calculateWrittenLength()	calculate the message body's length (not including the header and footer
boolean	equals(Object object)
byte[]	getData()
int	getSize()
int	getType()	Return the unique identifier for this type of I2NP message, as defined in the I2NP spec
int	hashCode()
void	readMessage(byte[] data, int offset, int dataSize, int type)	Read the body into the data structures, after the initial type byte and the uniqueId / expiration, using the current class's format as defined by the I2NP specification
void	setData(byte[] data)
String	toString()
protected int	writeMessageBody(byte[] out, int curIndex)	write the message body to the output array, starting at the given index

Methods inherited from class net.i2p.data.i2np.FastI2NPMessageImpl

readBytes, toByteArray, toByteArrayWithSavedChecksum

Methods inherited from class net.i2p.data.i2np.I2NPMessageImpl

createMessage, fromRawByteArray, fromRawByteArrayNTCP2, getMessageExpiration, getMessageSize, getRawMessageSize, getUniqueId, readBytes, readBytes, readMessage, registerBuilder, setMessageExpiration, setUniqueId, toByteArray, toByteArray, toRawByteArray, toRawByteArrayNTCP2, writeBytes

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

MESSAGE_TYPE

public static final int MESSAGE_TYPE

See Also:

Constant Field Values

Constructor Detail

DataMessage

public DataMessage(I2PAppContext context)

Method Detail

getData

public byte[] getData()

setData

public void setData(byte[] data)

Throws:

IllegalStateException - if data previously set, to protect saved checksum

getSize

public int getSize()

readMessage

public void readMessage(byte[] data,
                        int offset,
                        int dataSize,
                        int type)
                 throws I2NPMessageException

Description copied from interface: I2NPMessage

Read the body into the data structures, after the initial type byte and the uniqueId / expiration, using the current class's format as defined by the I2NP specification

Parameters:

data - data to read from

offset - where to start in the data array

dataSize - how long into the data to read

type - I2NP message type

Throws:

I2NPMessageException - if the stream doesn't contain a valid message that this class can read.

calculateWrittenLength

protected int calculateWrittenLength()

calculate the message body's length (not including the header and footer

Specified by:

calculateWrittenLength in class I2NPMessageImpl

writeMessageBody

protected int writeMessageBody(byte[] out,
                               int curIndex)

write the message body to the output array, starting at the given index

Specified by:

writeMessageBody in class I2NPMessageImpl

Returns:

the index into the array after the last byte written (NOT the length)

getType

public int getType()

Description copied from interface: I2NPMessage

Return the unique identifier for this type of I2NP message, as defined in the I2NP spec

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object