/*
* Copyright (c) [2016] [ <ether.camp> ]
* This file is part of the ethereumJ library.
*
* The ethereumJ library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ethereumJ library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
*/
package org.ethereum.net.rlpx;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import org.ethereum.net.server.Channel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.List;
/**
* The Netty handler responsible for decrypting/encrypting RLPx frames
* with the FrameCodec crated during HandshakeHandler initial work
*
* Created by Anton Nashatyrev on 15.10.2015.
*/
public class FrameCodecHandler extends NettyByteToMessageCodec<FrameCodec.Frame> {
private static final Logger loggerWire = LoggerFactory.getLogger("wire");
private static final Logger loggerNet = LoggerFactory.getLogger("net");
public FrameCodec frameCodec;
public Channel channel;
public FrameCodecHandler(FrameCodec frameCodec, Channel channel) {
this.frameCodec = frameCodec;
this.channel = channel;
}
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws IOException {
if (in.readableBytes() == 0) {
loggerWire.trace("in.readableBytes() == 0");
return;
}
loggerWire.trace("Decoding frame (" + in.readableBytes() + " bytes)");
List<FrameCodec.Frame> frames = frameCodec.readFrames(in);
// Check if a full frame was available. If not, we'll try later when more bytes come in.
if (frames == null || frames.isEmpty()) return;
for (int i = 0; i < frames.size(); i++) {
FrameCodec.Frame frame = frames.get(i);
channel.getNodeStatistics().rlpxInMessages.add();
}
out.addAll(frames);
}
@Override
protected void encode(ChannelHandlerContext ctx, FrameCodec.Frame frame, ByteBuf out) throws Exception {
frameCodec.writeFrame(frame, out);
channel.getNodeStatistics().rlpxOutMessages.add();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
if (channel.isDiscoveryMode()) {
loggerNet.trace("FrameCodec failed: " + cause);
} else {
if (cause instanceof IOException) {
loggerNet.debug("FrameCodec failed: " + ctx.channel().remoteAddress() + ": " + cause);
} else {
loggerNet.warn("FrameCodec failed: ", cause);
}
}
ctx.close();
}
}