Class AbstractSniHandler<T>

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

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

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

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler, ChannelOutboundHandler

Direct Known Subclasses:

SniHandler

public abstract class AbstractSniHandler<T>
extends SslClientHelloHandler<T>

Enables SNI (Server Name Indication) extension for server side SSL. For clients support SNI, the server could have multiple host name bound on a single IP. The client will send host name in the handshake data so server could decide which certificate to choose for the host name.

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
protected final long	handshakeTimeoutMillis

Fields inherited from class SslClientHelloHandler

MAX_CLIENT_HELLO_LENGTH

Fields inherited from class ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Modifier	Constructor	Description
	AbstractSniHandler()
protected	AbstractSniHandler(int maxClientHelloLength, long handshakeTimeoutMillis)
protected	AbstractSniHandler(long handshakeTimeoutMillis)

Method Summary

Modifier and Type	Method	Description
void	channelActive(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelActive() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	handlerAdded(ChannelHandlerContext ctx)	Do nothing by default, sub-classes may override this method.
protected 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 SslClientHelloHandler.onLookupComplete(ChannelHandlerContext, Future) on completion.
protected abstract Future<T>	lookup(ChannelHandlerContext ctx, String hostname)	Kicks off a lookup for the given SNI value and returns a Future which in turn will notify the onLookupComplete(ChannelHandlerContext, String, Future) on completion.
protected void	onLookupComplete(ChannelHandlerContext ctx, Future<T> future)	Called upon completion of the SslClientHelloHandler.lookup(ChannelHandlerContext, ByteBuf) Future.
protected abstract void	onLookupComplete(ChannelHandlerContext ctx, String hostname, Future<T> future)	Called upon completion of the lookup(ChannelHandlerContext, String) Future.

Methods inherited from class SslClientHelloHandler

bind, close, connect, decode, deregister, disconnect, flush, handlerRemoved0, read, write

Methods inherited from class ByteToMessageDecoder

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

Methods inherited from class ChannelInboundHandlerAdapter

channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, isSharable

Methods inherited from class Object

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

Methods inherited from interface ChannelHandler

handlerRemoved

Field Details

handshakeTimeoutMillis

protected final long handshakeTimeoutMillis

Constructor Details

AbstractSniHandler

protected AbstractSniHandler(long handshakeTimeoutMillis)

Parameters:

handshakeTimeoutMillis - the handshake timeout in milliseconds

AbstractSniHandler

protected AbstractSniHandler(int maxClientHelloLength,
 long handshakeTimeoutMillis)

Parameters:

handshakeTimeoutMillis - the handshake timeout in milliseconds

AbstractSniHandler

public AbstractSniHandler()

Method Details

handlerAdded

public void handlerAdded(ChannelHandlerContext ctx)
                  throws Exception

Description copied from class: ChannelHandlerAdapter

Do nothing by default, sub-classes may override this method.

Specified by:

handlerAdded in interface ChannelHandler

Overrides:

handlerAdded in class ChannelHandlerAdapter

Throws:

Exception

channelActive

public void channelActive(ChannelHandlerContext ctx)
                   throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelActive() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelActive in interface ChannelInboundHandler

Overrides:

channelActive in class ChannelInboundHandlerAdapter

Throws:

Exception

lookup

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

Description copied from class: SslClientHelloHandler

Kicks off a lookup for the given ClientHello and returns a Future which in turn will notify the SslClientHelloHandler.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;

Specified by:

lookup in class SslClientHelloHandler<T>

Throws:

Exception

See Also:

• SslClientHelloHandler.onLookupComplete(ChannelHandlerContext, Future)

onLookupComplete

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

Description copied from class: SslClientHelloHandler

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

Specified by:

onLookupComplete in class SslClientHelloHandler<T>

Throws:

Exception

See Also:

• SslClientHelloHandler.lookup(ChannelHandlerContext, ByteBuf)

lookup

protected abstract Future<T> lookup(ChannelHandlerContext ctx,
 String hostname)
                             throws Exception

Kicks off a lookup for the given SNI value and returns a Future which in turn will notify the onLookupComplete(ChannelHandlerContext, String, Future) on completion.

Throws:

Exception

See Also:

• onLookupComplete(ChannelHandlerContext, String, Future)

onLookupComplete

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

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

Throws:

Exception

See Also:

• lookup(ChannelHandlerContext, String)