io.aos.netty5.socksproxy.SocksPortUnificationServerHandler.java Source code

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Here is the source code for io.aos.netty5.socksproxy.SocksPortUnificationServerHandler.java

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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:
 *
 *   http://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.aos.netty5.socksproxy;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.socksx.SocksProtocolVersion;
import io.netty.handler.codec.socksx.v4.Socks4CmdRequestDecoder;
import io.netty.handler.codec.socksx.v4.Socks4MessageEncoder;
import io.netty.handler.codec.socksx.v5.Socks5InitRequestDecoder;
import io.netty.handler.codec.socksx.v5.Socks5MessageEncoder;

import java.util.List;

public class SocksPortUnificationServerHandler extends ByteToMessageDecoder {
    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        ChannelPipeline p = ctx.pipeline();
        SocksProtocolVersion version = SocksProtocolVersion.valueOf(in.readByte());
        System.out.println(version);
        in.resetReaderIndex();
        switch (version) {
        case SOCKS4a:
            p.addLast(new Socks4CmdRequestDecoder());
            p.addLast(Socks4MessageEncoder.INSTANCE);

            break;
        case SOCKS5:
            p.addLast(new Socks5InitRequestDecoder());
            p.addLast(Socks5MessageEncoder.INSTANCE);

            break;
        case UNKNOWN:
            in.clear();
            ctx.close();
            return;
        }
        p.addLast(SocksServerHandler.INSTANCE);
        p.remove(this);
    }
}