/*
* TeleStax, Open Source Cloud Communications
* Copyright 2011-2016, TeleStax Inc. and individual contributors
* by the @authors tag.
*
* This program is free software: you can redistribute it and/or modify
* under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package org.jdiameter.client.impl.transport.tcp.netty;
import java.util.List;
import org.jdiameter.api.AvpDataException;
import org.jdiameter.client.api.parser.IMessageParser;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
/**
*
* @author <a href="mailto:jqayyum@gmail.com"> Jehanzeb Qayyum </a>
*/
public class DiameterMessageDecoder extends ByteToMessageDecoder {
protected final IMessageParser parser;
protected final TCPClientConnection parentConnection;
public DiameterMessageDecoder(TCPClientConnection parentConnection, IMessageParser parser) {
this.parser = parser;
this.parentConnection = parentConnection;
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
if (in.readableBytes() >= 4) {
int first = in.getInt(in.readerIndex());
byte version = (byte) (first >> 24);
if (version != 1) {
return;
}
int messageLength = (first & 0xFFFFFF);
if (in.readableBytes() < messageLength) {
return;
}
byte[] bytes = new byte[messageLength];
in.readBytes(bytes);
try {
out.add(this.parser.createMessage(bytes));
} catch (AvpDataException e) {
this.parentConnection.onAvpDataException(e);
}
}
}
}