anon.tor.cells
Class RelayCell

java.lang.Object
  anon.tor.cells.Cell
      anon.tor.cells.RelayCell

Direct Known Subclasses:

ExtendCell, ExtendedCell

public class RelayCell
extends Cell

Author:

stefan

Field Summary

private boolean	m_digestGenerated
private byte	m_relayCommand
private java.lang.Integer	m_streamID
static byte	RELAY_BEGIN
static byte	RELAY_CONNECTED
static byte	RELAY_DATA
static byte	RELAY_DROP
static byte	RELAY_END
static byte	RELAY_EXTEND
static byte	RELAY_EXTENDED
static byte	RELAY_RESOLVE
static byte	RELAY_RESOLVED
static byte	RELAY_SENDME
static byte	RELAY_TRUNCATE
static byte	RELAY_TRUNCATED

Fields inherited from class anon.tor.cells.Cell

CELL_PAYLOAD_SIZE, CELL_SIZE, m_payload

Constructor Summary

RelayCell()
Constructor for a relay cell

RelayCell(int circID)
Constructor for a relay cell

RelayCell(int circID, byte[] payload, int offset)
Constructor for a relay cell

RelayCell(int circID, byte relaycommand, int streamid, byte[] data)
Constructor

Method Summary

void	checkDigest(org.bouncycastle.crypto.digests.SHA1Digest digest) checks if the digest of the relay cell is correct
private static byte[]	createPayload(byte relaycommand, int streamid, byte[] data)
void	doCryptography(MyAES engine) encode the cell
void	generateDigest(org.bouncycastle.crypto.digests.SHA1Digest digest) generates the digest for the relay cell
byte[]	getCellData() creates a fixed-sized cell 2 bytes - circID 1 byte - command 509 bytes - payload
byte	getRelayCommand() gets the command of the relay cell
byte[]	getRelayPayload() gets the payload of the relay cell
java.lang.Integer	getStreamID() gets the streamID of the relay cell

Methods inherited from class anon.tor.cells.Cell

createCell, getCircuitID, getCommand, getPayload, setPayload

Methods inherited from class java.lang.Object

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

Field Detail

RELAY_BEGIN

public static final byte RELAY_BEGIN

See Also:

Constant Field Values

RELAY_DATA

public static final byte RELAY_DATA

See Also:

Constant Field Values

RELAY_END

public static final byte RELAY_END

See Also:

Constant Field Values

RELAY_CONNECTED

public static final byte RELAY_CONNECTED

See Also:

Constant Field Values

RELAY_SENDME

public static final byte RELAY_SENDME

See Also:

Constant Field Values

RELAY_EXTEND

public static final byte RELAY_EXTEND

See Also:

Constant Field Values

RELAY_EXTENDED

public static final byte RELAY_EXTENDED

See Also:

Constant Field Values

RELAY_TRUNCATE

public static final byte RELAY_TRUNCATE

See Also:

Constant Field Values

RELAY_TRUNCATED

public static final byte RELAY_TRUNCATED

See Also:

Constant Field Values

RELAY_DROP

public static final byte RELAY_DROP

See Also:

Constant Field Values

RELAY_RESOLVE

public static final byte RELAY_RESOLVE

See Also:

Constant Field Values

RELAY_RESOLVED

public static final byte RELAY_RESOLVED

See Also:

Constant Field Values

m_relayCommand

private byte m_relayCommand

m_streamID

private java.lang.Integer m_streamID

m_digestGenerated

private boolean m_digestGenerated

Constructor Detail

RelayCell

public RelayCell()

Constructor for a relay cell

RelayCell

public RelayCell(int circID)

Constructor for a relay cell

Parameters:

circID - circID

RelayCell

public RelayCell(int circID,
                 byte[] payload,
                 int offset)

Constructor for a relay cell

Parameters:

circID - circID

payload - payload

offset - offset

RelayCell

public RelayCell(int circID,
                 byte relaycommand,
                 int streamid,
                 byte[] data)

Constructor

Parameters:

circID - circID

relaycommand - relaycommand

streamid - streamID

data - data

Method Detail

getRelayCommand

public byte getRelayCommand()

gets the command of the relay cell

Returns:

command

getStreamID

public java.lang.Integer getStreamID()

gets the streamID of the relay cell

Returns:

streamID

generateDigest

public void generateDigest(org.bouncycastle.crypto.digests.SHA1Digest digest)

generates the digest for the relay cell

Parameters:

digest - digest

checkDigest

public void checkDigest(org.bouncycastle.crypto.digests.SHA1Digest digest)
                 throws java.lang.Exception

checks if the digest of the relay cell is correct

Parameters:

digest - digest

Throws:

java.lang.Exception - if an error occurs

doCryptography

public void doCryptography(MyAES engine)
                    throws java.lang.Exception

encode the cell

Parameters:

engine - a cipher

Throws:

java.lang.Exception

createPayload

private static byte[] createPayload(byte relaycommand,
                                    int streamid,
                                    byte[] data)

getCellData

public byte[] getCellData()

Description copied from class: Cell

creates a fixed-sized cell

2 bytes - circID
1 byte - command
509 bytes - payload

Overrides:

getCellData in class Cell

Returns:

composed cell

getRelayPayload

public byte[] getRelayPayload()

gets the payload of the relay cell

Returns:

payload