@Override
public void channelRead0(ChannelHandlerContext ctx,
		SocksRequest socksRequest) throws Exception {
	switch (socksRequest.requestType()) {
	case INIT: {
		logger.info("localserver init");
		ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
		ctx.write(new SocksInitResponse(SocksAuthScheme.NO_AUTH));
		break;
	}
	case AUTH:
		ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
		ctx.write(new SocksAuthResponse(SocksAuthStatus.SUCCESS));
		break;
	case CMD:
		SocksCmdRequest req = (SocksCmdRequest) socksRequest;
		if (req.cmdType() == SocksCmdType.CONNECT) {
			logger.info("localserver connect");
			ctx.pipeline().addLast(new SocksServerConnectHandler(config));
			ctx.pipeline().remove(this);
			ctx.fireChannelRead(socksRequest);
		} else {
			ctx.close();
		}
		break;
	case UNKNOWN:
		ctx.close();
		break;
	}
}
 

@Override
public void channelRead0(ChannelHandlerContext ctx, SocksRequest socksRequest) throws Exception {
    switch (socksRequest.requestType()) {
        case INIT: {
            // auth support example
            //ctx.pipeline().addFirst(new SocksAuthRequestDecoder());
            //ctx.write(new SocksInitResponse(SocksAuthScheme.AUTH_PASSWORD));
            ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
            ctx.write(new SocksInitResponse(SocksAuthScheme.NO_AUTH));
            break;
        }
        case AUTH:
            ctx.pipeline().addFirst(new SocksCmdRequestDecoder());
            ctx.write(new SocksAuthResponse(SocksAuthStatus.SUCCESS));
            break;
        case CMD:
            SocksCmdRequest req = (SocksCmdRequest) socksRequest;
            if (req.cmdType() == SocksCmdType.CONNECT) {
                ctx.pipeline().addLast(new SocksServerConnectHandler());
                ctx.pipeline().remove(this);
                ctx.fireChannelRead(socksRequest);
            } else {
                ctx.close();
            }
            break;
        case UNKNOWN:
            ctx.close();
            break;
    }
}
 

private ByteBuf buildInit() {
	ByteBuf buf = Unpooled.buffer();
	new SocksInitResponse(SocksAuthScheme.NO_AUTH).encodeAsByteBuf(buf);
	return buf;
}