Class SslClientHelloHandler<T>

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.ssl.SslClientHelloHandler<T>

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler, ChannelOutboundHandler

Direct Known Subclasses:

AbstractSniHandler

public abstract class SslClientHelloHandler<T>
extends ByteToMessageDecoder
implements ChannelOutboundHandler

ByteToMessageDecoder which allows to be notified once a full ClientHello was received.

Nested Class Summary

Nested classes/interfaces inherited from class ByteToMessageDecoder

ByteToMessageDecoder.Cumulator

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MAX_CLIENT_HELLO_LENGTH	The maximum length of client hello message as defined by RFC5246.

Fields inherited from class ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Modifier	Constructor	Description
	SslClientHelloHandler()
protected	SslClientHelloHandler(int maxClientHelloLength)

Method Summary

Modifier and Type	Method	Description
void	bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise)	Called once a bind operation is made.
void	close(ChannelHandlerContext ctx, ChannelPromise promise)	Called once a close operation is made.
void	connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise)	Called once a connect operation is made.
protected void	decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)	Decode the from one ByteBuf to an other.
void	deregister(ChannelHandlerContext ctx, ChannelPromise promise)	Called once a deregister operation is made from the current registered EventLoop.
void	disconnect(ChannelHandlerContext ctx, ChannelPromise promise)	Called once a disconnect operation is made.
void	flush(ChannelHandlerContext ctx)	Called once a flush operation is made.
protected void	handlerRemoved0(ChannelHandlerContext ctx)	Gets called after the ByteToMessageDecoder was removed from the actual context and it doesn't handle events anymore.
protected abstract Future<T>	lookup(ChannelHandlerContext ctx, ByteBuf clientHello)	Kicks off a lookup for the given ClientHello and returns a Future which in turn will notify the onLookupComplete(ChannelHandlerContext, Future) on completion.
protected abstract void	onLookupComplete(ChannelHandlerContext ctx, Future<T> future)	Called upon completion of the lookup(ChannelHandlerContext, ByteBuf) Future.
void	read(ChannelHandlerContext ctx)	Intercepts ChannelHandlerContext.read().
void	write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise)	Called once a write operation is made.

Methods inherited from class ByteToMessageDecoder

actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggered

Methods inherited from class ChannelInboundHandlerAdapter

channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, handlerAdded, isSharable

Methods inherited from class Object

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

Methods inherited from interface ChannelHandler

handlerAdded, handlerRemoved

Field Details

MAX_CLIENT_HELLO_LENGTH

public static final int MAX_CLIENT_HELLO_LENGTH

The maximum length of client hello message as defined by RFC5246.

See Also:

• Constant Field Values

Constructor Details

SslClientHelloHandler

public SslClientHelloHandler()

SslClientHelloHandler

protected SslClientHelloHandler(int maxClientHelloLength)

Method Details

decode

protected void decode(ChannelHandlerContext ctx,
 ByteBuf in,
 List<Object> out)
               throws Exception

Description copied from class: ByteToMessageDecoder

Decode the from one ByteBuf to an other. This method will be called till either the input ByteBuf has nothing to read when return from this method or till nothing was read from the input ByteBuf.

Specified by:

decode in class ByteToMessageDecoder

Parameters:

ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

in - the ByteBuf from which to read data

out - the List to which decoded messages should be added

Throws:

Exception - is thrown if an error occurs

handlerRemoved0

protected void handlerRemoved0(ChannelHandlerContext ctx)
                        throws Exception

Description copied from class: ByteToMessageDecoder

Gets called after the ByteToMessageDecoder was removed from the actual context and it doesn't handle events anymore.

Overrides:

handlerRemoved0 in class ByteToMessageDecoder

Throws:

Exception

lookup

protected abstract Future<T> lookup(ChannelHandlerContext ctx,
 ByteBuf clientHello)
                             throws Exception

Kicks off a lookup for the given ClientHello and returns a Future which in turn will notify the onLookupComplete(ChannelHandlerContext, Future) on completion. See https://tools.ietf.org/html/rfc5246#section-7.4.1.2

struct {
   ProtocolVersion client_version;
   Random random;
   SessionID session_id;
   CipherSuite cipher_suitesinvalid input: '<'2..2^16-2>;
   CompressionMethod compression_methodsinvalid input: '<'1..2^8-1>;
   select (extensions_present) {
       case false:
           struct {};
       case true:
           Extension extensionsinvalid input: '<'0..2^16-1>;
   };
} ClientHello;

Throws:

Exception

See Also:

• onLookupComplete(ChannelHandlerContext, Future)

onLookupComplete

protected abstract void onLookupComplete(ChannelHandlerContext ctx,
 Future<T> future)
                                  throws Exception

Called upon completion of the lookup(ChannelHandlerContext, ByteBuf) Future.

Throws:

Exception

See Also:

• lookup(ChannelHandlerContext, ByteBuf)

read

public void read(ChannelHandlerContext ctx)
          throws Exception

Description copied from interface: ChannelOutboundHandler

Intercepts ChannelHandlerContext.read().

Specified by:

read in interface ChannelOutboundHandler

Throws:

Exception

bind

public void bind(ChannelHandlerContext ctx,
 SocketAddress localAddress,
 ChannelPromise promise)
          throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a bind operation is made.

Specified by:

bind in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the bind operation is made

localAddress - the SocketAddress to which it should bound

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

connect

public void connect(ChannelHandlerContext ctx,
 SocketAddress remoteAddress,
 SocketAddress localAddress,
 ChannelPromise promise)
             throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a connect operation is made.

Specified by:

connect in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the connect operation is made

remoteAddress - the SocketAddress to which it should connect

localAddress - the SocketAddress which is used as source on connect

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

disconnect

public void disconnect(ChannelHandlerContext ctx,
 ChannelPromise promise)
                throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a disconnect operation is made.

Specified by:

disconnect in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the disconnect operation is made

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

close

public void close(ChannelHandlerContext ctx,
 ChannelPromise promise)
           throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a close operation is made.

Specified by:

close in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the close operation is made

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

deregister

public void deregister(ChannelHandlerContext ctx,
 ChannelPromise promise)
                throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a deregister operation is made from the current registered EventLoop.

Specified by:

deregister in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the close operation is made

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

write

public void write(ChannelHandlerContext ctx,
 Object msg,
 ChannelPromise promise)
           throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a write operation is made. The write operation will write the messages through the ChannelPipeline. Those are then ready to be flushed to the actual Channel once Channel.flush() is called

Specified by:

write in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the write operation is made

msg - the message to write

promise - the ChannelPromise to notify once the operation completes

Throws:

Exception - thrown if an error occurs

flush

public void flush(ChannelHandlerContext ctx)
           throws Exception

Description copied from interface: ChannelOutboundHandler

Called once a flush operation is made. The flush operation will try to flush out all previous written messages that are pending.

Specified by:

flush in interface ChannelOutboundHandler

Parameters:

ctx - the ChannelHandlerContext for which the flush operation is made

Throws:

Exception - thrown if an error occurs