Package net.i2p.router.transport.udp

Class SSU2Payload

java.lang.Object

net.i2p.router.transport.udp.SSU2Payload

class SSU2Payload
extends Object

SSU2 Payload generation and parsing

Since:

0.9.54

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SSU2Payload.AckBlock
static class	SSU2Payload.AddressBlock
static class	SSU2Payload.Block	Base class for blocks to be transmitted.
static class	SSU2Payload.DateTimeBlock
static class	SSU2Payload.FirstFragBlock	Same format as I2NPBlock
static class	SSU2Payload.FollowFragBlock
static class	SSU2Payload.I2NPBlock
static class	SSU2Payload.NewTokenBlock
static class	SSU2Payload.OptionsBlock
static class	SSU2Payload.PaddingBlock
static class	SSU2Payload.PathChallengeBlock
static class	SSU2Payload.PathResponseBlock
static interface	SSU2Payload.PayloadCallback	For all callbacks, recommend throwing exceptions only from the handshake.
static class	SSU2Payload.PeerTestBlock
static class	SSU2Payload.RelayIntroBlock
static class	SSU2Payload.RelayRequestBlock
static class	SSU2Payload.RelayResponseBlock
static class	SSU2Payload.RelayTagBlock
static class	SSU2Payload.RelayTagRequestBlock
static class	SSU2Payload.RIBlock
static class	SSU2Payload.TerminationBlock

Field Summary

Fields

Modifier and Type	Field	Description
static int	BLOCK_HEADER_SIZE
static int	BLOCK_TERMINATION

Constructor Summary

Constructors

Constructor	Description
SSU2Payload()

Method Summary

Modifier and Type	Method	Description
static int	processPayload(I2PAppContext ctx, SSU2Payload.PayloadCallback cb, byte[] payload, int off, int length, boolean isHandshake, RemoteHostId from)	Incoming payload.
static int	writePayload(byte[] payload, int off, List<SSU2Payload.Block> blocks)

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_HEADER_SIZE

public static final int BLOCK_HEADER_SIZE

See Also:

Constant Field Values

BLOCK_TERMINATION

public static final int BLOCK_TERMINATION

See Also:

Constant Field Values

Constructor Detail

SSU2Payload

SSU2Payload()

Method Detail

processPayload

public static int processPayload(I2PAppContext ctx,
                                 SSU2Payload.PayloadCallback cb,
                                 byte[] payload,
                                 int off,
                                 int length,
                                 boolean isHandshake,
                                 RemoteHostId from)
                          throws IOException,
                                 DataFormatException,
                                 I2NPMessageException

Incoming payload. Calls the callback for each received block.

Parameters:

isHandshake - true for Token Req, Retry, Sess Req, Sess Created; false for Sess Confirmed

from - for path challenge/response only, may be null

Returns:

number of blocks processed

Throws:

IOException - on major errors

DataFormatException - on parsing of individual blocks

I2NPMessageException - on parsing of I2NP block

writePayload

public static int writePayload(byte[] payload,
                               int off,
                               List<SSU2Payload.Block> blocks)

Parameters:

payload - writes to it starting at off

Returns:

the new offset