Class Socks4ServerDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.codec.ReplayingDecoder<Socks4ServerDecoder.State>

io.netty.handler.codec.socksx.v4.Socks4ServerDecoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class Socks4ServerDecoder
extends ReplayingDecoder<Socks4ServerDecoder.State>

Decodes a single Socks4CommandRequest from the inbound ByteBufs. On successful decode, this decoder will forward the received data to the next handler, so that other handler can remove this decoder later. On failed decode, this decoder will discard the received data, so that other handler closes the connection later.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Socks4ServerDecoder.State

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
private java.lang.String	dstAddr
private int	dstPort
private static final int	MAX_FIELD_LENGTH
private Socks4CommandType	type
private java.lang.String	userId

Fields inherited from class ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Constructor	Description
Socks4ServerDecoder()

Method Summary

Modifier and Type	Method	Description
protected void	decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out)	Decode the from one ByteBuf to an other.
private void	fail(java.util.List<java.lang.Object> out, java.lang.Exception cause)
private static java.lang.String	readString(java.lang.String fieldName, ByteBuf in)	Reads a variable-length NUL-terminated string as defined in SOCKS4.

Methods inherited from class ReplayingDecoder

callDecode, checkpoint, checkpoint, state, state

Methods inherited from class ByteToMessageDecoder

actualReadableBytes, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, 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 java.lang.Object

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

Methods inherited from interface ChannelHandler

handlerAdded

Field Details

MAX_FIELD_LENGTH

private static final int MAX_FIELD_LENGTH

See Also:

• Constant Field Values

type

private Socks4CommandType type

dstAddr

private java.lang.String dstAddr

dstPort

private int dstPort

userId

private java.lang.String userId

Constructor Details

Socks4ServerDecoder

public Socks4ServerDecoder()

Method Details

decode

protected void decode(ChannelHandlerContext ctx,
 ByteBuf in,
 java.util.List<java.lang.Object> out)
               throws java.lang.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:

java.lang.Exception - is thrown if an error occurs

fail

private void fail(java.util.List<java.lang.Object> out,
 java.lang.Exception cause)

readString

private static java.lang.String readString(java.lang.String fieldName,
 ByteBuf in)

Reads a variable-length NUL-terminated string as defined in SOCKS4.