/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.net.mysql;
import java.nio.ByteBuffer;
import org.opencloudb.mysql.BufferUtil;
import org.opencloudb.mysql.MySQLMessage;
import org.opencloudb.net.FrontendConnection;
/**
* From server to client during initial handshake.
*
* <pre>
* Bytes Name
* ----- ----
* 1 protocol_version
* n (Null-Terminated String) server_version
* 4 thread_id
* 8 scramble_buff
* 1 (filler) always 0x00
* 2 server_capabilities
* 1 server_language
* 2 server_status
* 13 (filler) always 0x00 ...
* 13 rest of scramble_buff (4.1)
*
* @see http://forge.mysql.com/wiki/MySQL_Internals_ClientServer_Protocol#Handshake_Initialization_Packet
* </pre>
*
* @author mycat
*/
public class HandshakePacket extends MySQLPacket {
private static final byte[] FILLER_13 = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
public byte protocolVersion;
public byte[] serverVersion;
public long threadId;
public byte[] seed;
public int serverCapabilities;
public byte serverCharsetIndex;
public int serverStatus;
public byte[] restOfScrambleBuff;
public void read(BinaryPacket bin) {
packetLength = bin.packetLength;
packetId = bin.packetId;
MySQLMessage mm = new MySQLMessage(bin.data);
protocolVersion = mm.read();
serverVersion = mm.readBytesWithNull();
threadId = mm.readUB4();
seed = mm.readBytesWithNull();
serverCapabilities = mm.readUB2();
serverCharsetIndex = mm.read();
serverStatus = mm.readUB2();
mm.move(13);
restOfScrambleBuff = mm.readBytesWithNull();
}
public void read(byte[] data) {
MySQLMessage mm = new MySQLMessage(data);
packetLength = mm.readUB3();
packetId = mm.read();
protocolVersion = mm.read();
serverVersion = mm.readBytesWithNull();
threadId = mm.readUB4();
seed = mm.readBytesWithNull();
serverCapabilities = mm.readUB2();
serverCharsetIndex = mm.read();
serverStatus = mm.readUB2();
mm.move(13);
restOfScrambleBuff = mm.readBytesWithNull();
}
public void write(FrontendConnection c) {
ByteBuffer buffer = c.allocate();
BufferUtil.writeUB3(buffer, calcPacketSize());
buffer.put(packetId);
buffer.put(protocolVersion);
BufferUtil.writeWithNull(buffer, serverVersion);
BufferUtil.writeUB4(buffer, threadId);
BufferUtil.writeWithNull(buffer, seed);
BufferUtil.writeUB2(buffer, serverCapabilities);
buffer.put(serverCharsetIndex);
BufferUtil.writeUB2(buffer, serverStatus);
buffer.put(FILLER_13);
// buffer.position(buffer.position() + 13);
BufferUtil.writeWithNull(buffer, restOfScrambleBuff);
c.write(buffer);
}
@Override
public int calcPacketSize() {
int size = 1;
size += serverVersion.length;// n
size += 5;// 1+4
size += seed.length;// 8
size += 19;// 1+2+1+2+13
size += restOfScrambleBuff.length;// 12
size += 1;// 1
return size;
}
@Override
protected String getPacketInfo() {
return "MySQL Handshake Packet";
}
}