org.elasticsearch.transport.netty.SizeHeaderFrameDecoder Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of elasticsearch

ElasticSearch - Open Source, Distributed, RESTful Search Engine

There is a newer version: 8.14.1

package org.elasticsearch.transport.netty;

import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.monitor.jvm.JvmInfo;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.frame.FrameDecoder;
import org.jboss.netty.handler.codec.frame.TooLongFrameException;

import java.io.StreamCorruptedException;

/**
 */
public class SizeHeaderFrameDecoder extends FrameDecoder {

    private static final long NINETY_PER_HEAP_SIZE = (long) (JvmInfo.jvmInfo().mem().heapMax().bytes() * 0.9);

    @Override
    protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer) throws Exception {
        if (buffer.readableBytes() < 6) {
            return null;
        }

        int readerIndex = buffer.readerIndex();
        if (buffer.getByte(readerIndex) != 'E' || buffer.getByte(readerIndex + 1) != 'S') {
            throw new StreamCorruptedException("invalid internal transport message format");
        }

        int dataLen = buffer.getInt(buffer.readerIndex() + 2);
        if (dataLen <= 0) {
            throw new StreamCorruptedException("invalid data length: " + dataLen);
        }
        // safety against too large frames being sent
        if (dataLen > NINETY_PER_HEAP_SIZE) {
            throw new TooLongFrameException(
                    "transport content length received [" + new ByteSizeValue(dataLen) + "] exceeded [" + new ByteSizeValue(NINETY_PER_HEAP_SIZE) + "]");
        }

        if (buffer.readableBytes() < dataLen + 6) {
            return null;
        }
        buffer.skipBytes(6);
        return buffer;
    }
}