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MockServer NeoLight Netty Server

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/*
 * Copyright © 2024 XDEV Software (https://xdev.software)
 *
 * Licensed 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 software.xdev.mockserver.netty.proxy.socks;

import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.socksx.v4.DefaultSocks4CommandResponse;
import io.netty.handler.codec.socksx.v4.Socks4CommandRequest;
import io.netty.handler.codec.socksx.v4.Socks4CommandStatus;
import io.netty.handler.codec.socksx.v4.Socks4CommandType;
import software.xdev.mockserver.configuration.ServerConfiguration;
import software.xdev.mockserver.lifecycle.LifeCycle;


@ChannelHandler.Sharable
public class Socks4ProxyHandler extends SocksProxyHandler
{
	public Socks4ProxyHandler(final ServerConfiguration configuration, final LifeCycle server)
	{
		super(configuration, server);
	}
	
	@Override
	protected void channelRead0(final ChannelHandlerContext ctx, final Socks4CommandRequest commandRequest)
	{
		if(commandRequest.type().equals(Socks4CommandType.CONNECT))
		{
			this.forwardConnection(
				ctx,
				new Socks4ConnectHandler(this.configuration,
					this.server, commandRequest.dstAddr(), commandRequest.dstPort()));
			ctx.fireChannelRead(commandRequest);
		}
		else
		{
			ctx.writeAndFlush(new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED))
				.addListener(ChannelFutureListener.CLOSE);
		}
	}
}