Package org.apache.mina.filter.ssl

Class SslHandler

java.lang.Object

org.apache.mina.filter.ssl.SslHandler

Direct Known Subclasses:

SSLHandlerG0

public abstract class SslHandler
extends Object

Default interface for SSL exposed to the SslFilter

Author:

Jonathan Valliere, Apache MINA Project

Field Summary

Fields

Modifier and Type	Field	Description
protected static Logger	LOGGER	Static logger
protected Deque<WriteRequest>	mAckQueue	Requests which have been sent to the socket and waiting acknowledgment
protected static int	MAX_ENCODER_BUFFER_PACKETS	Maximum size of encoder buffer in packets
protected IoBuffer	mDecodeBuffer	Progressive decoder buffer
protected Deque<WriteRequest>	mEncodeQueue	Write Requests which are enqueued prior to the completion of the handshaking
protected SSLEngine	mEngine	SSL Engine
protected Executor	mExecutor	Task executor
protected static int	MIN_ENCODER_BUFFER_PACKETS	Minimum size of encoder buffer in packets
protected IoSession	mSession	Socket session
protected static IoBuffer	ZERO	Zero length buffer used to prime the ssl engine

Constructor Summary

Constructors

Constructor	Description
SslHandler(SSLEngine p, Executor e, IoSession s)	Instantiates a new handler

Method Summary

Modifier and Type	Method	Description
abstract void	ack(IoFilter.NextFilter next, WriteRequest request)	Acknowledge that a WriteRequest has been successfully written to the IoSession
protected IoBuffer	allocate_app_buffer(int estimate)	Allocates the default decoder buffer for the given source size
protected IoBuffer	allocate_encode_buffer(int estimate)	Allocates the default encoder buffer for the given source size
abstract void	close(IoFilter.NextFilter next, boolean linger)	Closes the encryption session and writes any required messages
abstract boolean	isConnected()
abstract boolean	isOpen()
abstract void	open(IoFilter.NextFilter next)	Opens the encryption session, this may include sending the initial handshake message
abstract void	receive(IoFilter.NextFilter next, IoBuffer message)	Decodes encrypted messages and passes the results to the next filter.
protected IoBuffer	resume_decode_buffer(IoBuffer source)	Combines the received data with any previously received data
protected void	suspend_decode_buffer(IoBuffer source)	Stores data for later use if any is remaining
String	toString()
abstract void	write(IoFilter.NextFilter next, WriteRequest request)	Encrypts and writes the specified WriteRequest to the IoSession or enqueues it to be processed later.

Methods inherited from class java.lang.Object

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

Field Detail

MIN_ENCODER_BUFFER_PACKETS

protected static final int MIN_ENCODER_BUFFER_PACKETS

Minimum size of encoder buffer in packets

See Also:

Constant Field Values

MAX_ENCODER_BUFFER_PACKETS

protected static final int MAX_ENCODER_BUFFER_PACKETS

Maximum size of encoder buffer in packets

See Also:

Constant Field Values

ZERO

protected static final IoBuffer ZERO

Zero length buffer used to prime the ssl engine

LOGGER

protected static final Logger LOGGER

Static logger

mEncodeQueue

protected final Deque<WriteRequest> mEncodeQueue

Write Requests which are enqueued prior to the completion of the handshaking

mAckQueue

protected final Deque<WriteRequest> mAckQueue

Requests which have been sent to the socket and waiting acknowledgment

mEngine

protected final SSLEngine mEngine

SSL Engine

mExecutor

protected final Executor mExecutor

Task executor

mSession

protected final IoSession mSession

Socket session

mDecodeBuffer

protected IoBuffer mDecodeBuffer

Progressive decoder buffer

Constructor Detail

SslHandler

public SslHandler(SSLEngine p,
                  Executor e,
                  IoSession s)

Instantiates a new handler

Parameters:

p - engine

e - executor

s - session

Method Detail

isOpen

public abstract boolean isOpen()

Returns:

true if the encryption session is open

isConnected

public abstract boolean isConnected()

Returns:

true if the encryption session is connected and secure

open

public abstract void open(IoFilter.NextFilter next)
                   throws SSLException

Opens the encryption session, this may include sending the initial handshake message

Parameters:

next - The next filter

Throws:

SSLException - The thrown exception

receive

public abstract void receive(IoFilter.NextFilter next,
                             IoBuffer message)
                      throws SSLException

Decodes encrypted messages and passes the results to the next filter.

Parameters:

next - The next filter

message - the received message

Throws:

SSLException - The thrown exception

ack

public abstract void ack(IoFilter.NextFilter next,
                         WriteRequest request)
                  throws SSLException

Acknowledge that a WriteRequest has been successfully written to the IoSession

This functionality is used to enforce flow control by allowing only a specific number of pending write operations at any moment of time. When one WriteRequest is acknowledged, another can be encoded and written.

Parameters:

next - The next filter

request - The request to ack

Throws:

SSLException - The thrown exception

write

public abstract void write(IoFilter.NextFilter next,
                           WriteRequest request)
                    throws SSLException,
                           WriteRejectedException

Encrypts and writes the specified WriteRequest to the IoSession or enqueues it to be processed later.

The encryption session may be currently handshaking preventing application messages from being written.

Parameters:

next - The next filter

request - The request to write

Throws:

SSLException - The thrown exception

WriteRejectedException - when the session is closing

close

public abstract void close(IoFilter.NextFilter next,
                           boolean linger)
                    throws SSLException

Closes the encryption session and writes any required messages

Parameters:

next - The next filter

linger - if true, write any queued messages before closing

Throws:

SSLException - The thrown exception

toString

public String toString()

Overrides:

toString in class Object

resume_decode_buffer

protected IoBuffer resume_decode_buffer(IoBuffer source)

Combines the received data with any previously received data

Parameters:

source - received data

Returns:

buffer to decode

suspend_decode_buffer

protected void suspend_decode_buffer(IoBuffer source)

Stores data for later use if any is remaining

Parameters:

source - the buffer previously returned by resume_decode_buffer(IoBuffer)

allocate_encode_buffer

protected IoBuffer allocate_encode_buffer(int estimate)

Allocates the default encoder buffer for the given source size

Parameters:

estimate - The estimated remaining size

Returns:

buffer The allocated buffer

allocate_app_buffer

protected IoBuffer allocate_app_buffer(int estimate)

Allocates the default decoder buffer for the given source size

Parameters:

estimate - The estimated remaining size

Returns:

buffer The allocated buffer