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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.codec.socks;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ReplayingDecoder;
import io.netty.handler.codec.socks.SocksCmdResponseDecoder.State;
import io.netty.util.NetUtil;
import io.netty.util.internal.UnstableApi;

import java.util.List;

/**
 * Decodes {@link ByteBuf}s into {@link SocksCmdResponse}.
 * Before returning SocksResponse decoder removes itself from pipeline.
 */
public class SocksCmdResponseDecoder extends ReplayingDecoder {

    private SocksCmdStatus cmdStatus;
    private SocksAddressType addressType;

    public SocksCmdResponseDecoder() {
        super(State.CHECK_PROTOCOL_VERSION);
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf byteBuf, List out) throws Exception {
        switch (state()) {
            case CHECK_PROTOCOL_VERSION: {
                if (byteBuf.readByte() != SocksProtocolVersion.SOCKS5.byteValue()) {
                    out.add(SocksCommonUtils.UNKNOWN_SOCKS_RESPONSE);
                    break;
                }
                checkpoint(State.READ_CMD_HEADER);
            }
            case READ_CMD_HEADER: {
                cmdStatus = SocksCmdStatus.valueOf(byteBuf.readByte());
                byteBuf.skipBytes(1); // reserved
                addressType = SocksAddressType.valueOf(byteBuf.readByte());
                checkpoint(State.READ_CMD_ADDRESS);
            }
            case READ_CMD_ADDRESS: {
                switch (addressType) {
                    case IPv4: {
                        String host = NetUtil.intToIpAddress(ByteBufUtil.readIntBE(byteBuf));
                        int port = ByteBufUtil.readUnsignedShortBE(byteBuf);
                        out.add(new SocksCmdResponse(cmdStatus, addressType, host, port));
                        break;
                    }
                    case DOMAIN: {
                        int fieldLength = byteBuf.readByte();
                        String host = SocksCommonUtils.readUsAscii(byteBuf, fieldLength);
                        int port = ByteBufUtil.readUnsignedShortBE(byteBuf);
                        out.add(new SocksCmdResponse(cmdStatus, addressType, host, port));
                        break;
                    }
                    case IPv6: {
                        byte[] bytes = new byte[16];
                        byteBuf.readBytes(bytes);
                        String host = SocksCommonUtils.ipv6toStr(bytes);
                        int port = ByteBufUtil.readUnsignedShortBE(byteBuf);
                        out.add(new SocksCmdResponse(cmdStatus, addressType, host, port));
                        break;
                    }
                    case UNKNOWN: {
                        out.add(SocksCommonUtils.UNKNOWN_SOCKS_RESPONSE);
                        break;
                    }
                    default: {
                        throw new Error();
                    }
                }
                break;
            }
            default: {
                throw new Error();
            }
        }
        ctx.pipeline().remove(this);
    }

    @UnstableApi
    public enum State {
        CHECK_PROTOCOL_VERSION,
        READ_CMD_HEADER,
        READ_CMD_ADDRESS
    }
}
    

    

    

            

    

            



    
    






    
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