Package org.drasyl.peer.connection.handler

Class SignatureHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.channel.SimpleChannelInboundHandler<I>

org.drasyl.peer.connection.handler.SimpleChannelDuplexHandler<Message,Message>

org.drasyl.peer.connection.handler.SignatureHandler

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler, io.netty.channel.ChannelOutboundHandler

public class SignatureHandler
extends SimpleChannelDuplexHandler<Message,Message>

Acts as a guard for in- and outbound messages.
Signs automatically outbound messages.
Validates automatically inbound messages and drops them, iff a signature is invalid or if a validation is impossible, e.g. the public key of the sender is unknown. In this case, drop information is written to the log.

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SIGNATURE_HANDLER

Constructor Summary

Constructors

Constructor	Description
SignatureHandler(int networkId, Identity identity)

Method Summary

Modifier and Type	Method	Description
protected void	channelRead0(io.netty.channel.ChannelHandlerContext ctx, Message msg)	Is called for each message of type SimpleChannelDuplexHandler on inbound channel.
protected void	channelWrite0(io.netty.channel.ChannelHandlerContext ctx, Message msg, io.netty.channel.ChannelPromise promise)	Is called for each message of type SimpleChannelDuplexHandler on the outbound channel.

Methods inherited from class org.drasyl.peer.connection.handler.SimpleChannelDuplexHandler

acceptOutboundMessage, bind, close, connect, deregister, disconnect, flush, read, write

Methods inherited from class io.netty.channel.SimpleChannelInboundHandler

acceptInboundMessage, channelRead

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Field Details

SIGNATURE_HANDLER

public static final String SIGNATURE_HANDLER

See Also:

• Constant Field Values

Constructor Details

SignatureHandler

public SignatureHandler(int networkId,
 Identity identity)

Method Details

channelRead0

protected void channelRead0(io.netty.channel.ChannelHandlerContext ctx,
 Message msg)

Description copied from class: SimpleChannelDuplexHandler

Is called for each message of type SimpleChannelDuplexHandler on inbound channel.

Specified by:

channelRead0 in class SimpleChannelDuplexHandler<Message,Message>

Parameters:

ctx - the ChannelHandlerContext which this SimpleChannelDuplexHandler belongs to

msg - the message to handle

channelWrite0

protected void channelWrite0(io.netty.channel.ChannelHandlerContext ctx,
 Message msg,
 io.netty.channel.ChannelPromise promise)

Description copied from class: SimpleChannelDuplexHandler

Is called for each message of type SimpleChannelDuplexHandler on the outbound channel.

Specified by:

channelWrite0 in class SimpleChannelDuplexHandler<Message,Message>

Parameters:

ctx - the ChannelHandlerContext which this SimpleChannelDuplexHandler belongs to

msg - the message to handle

promise - the corresponding promise