/*******************************************************************************
* Copyright (C) 2013 JMaNGOS <http://jmangos.org/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package org.jmangos.realm.network.decoder;
import java.math.BigInteger;
import java.nio.ByteOrder;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
import org.jmangos.commons.OpcodeTable;
import org.jmangos.realm.network.handler.RealmToClientChannelHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The Class PacketFrameEncoder.
*/
public class PacketFrameEncoder extends OneToOneEncoder {
/** The Constant log. */
private static final Logger log = LoggerFactory.getLogger(PacketFrameEncoder.class);
/*
* (non-Javadoc)
*
* @see
* org.jboss.netty.handler.codec.oneone.OneToOneEncoder#encode(org.jboss
* .netty.channel.
* ChannelHandlerContext, org.jboss.netty.channel.Channel, java.lang.Object)
*/
@Override
protected Object encode(final ChannelHandlerContext ctx, final Channel channel, final Object msg)
throws Exception {
final ChannelBuffer message = (ChannelBuffer) msg;
final RealmToClientChannelHandler channelHandler =
(RealmToClientChannelHandler) ctx.getPipeline().getLast();
final int opcode = message.readUnsignedShort();
final int size = message.readableBytes() + 2;
final byte[] header = new byte[4];
int index = 0;
if (size > 0x7FFF) {
header[index++] = (byte) (0x80 | (0xFF & (size >> 16)));
}
header[index++] = (byte) (0xFF & (size >> 8));
header[index++] = (byte) (0xFF & size);
header[index++] = (byte) (0xFF & opcode);
header[index] = (byte) (0xFF & (opcode >> 8));
final byte[] encryptHeader = channelHandler.getCrypt().decrypt(header);
final ChannelBuffer frame = ChannelBuffers.buffer(ByteOrder.LITTLE_ENDIAN, (size + index));
frame.writeBytes(encryptHeader, 0, index + 1);
final ChannelBuffer tmp = message.readBytes(message.readableBytes());
frame.writeBytes(tmp);
log.info(String.format("[SEND PACKET] : 0x%02X - %s", opcode,
OpcodeTable.getOpcode(opcode)));
final String d = toHex(tmp.array());
log.info(d);
return frame;
}
/**
*
* @param text
* the text
* @param chunkSize
* the chunk size
* @return the list
*/
public static String toHex(final byte[] bytes) {
if (bytes.length == 0) {
return "";
}
final BigInteger bi = new BigInteger(1, bytes);
return String.format("%0" + (bytes.length << 1) + "X", bi);
}
}