mysql协议的processkill包及解析

来源：动视网责编：小采时间：2020-11-09 09:09:18

mysql协议的processkill包及解析

mysql协议的processkill包及解析:githttps://github.com/sea-boat/mysql-protocol概况mysql客户端可以用process kill命令让服务端终止某个连接，正常会返回ok包。mysql通信报文结构类型名字描述int<3>payload长度按照the least significant byte f

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导读mysql协议的processkill包及解析:githttps://github.com/sea-boat/mysql-protocol概况mysql客户端可以用process kill命令让服务端终止某个连接，正常会返回ok包。mysql通信报文结构类型名字描述int<3>payload长度按照the least significant byte f

git

https://github.com/sea-boat/mysql-protocol

概况

mysql客户端可以用process kill命令让服务端终止某个连接，正常会返回ok包。

mysql通信报文结构

类型	名字	描述
int<3>	payload长度	按照the least significant byte first存储，3个字节的payload和1个字节的序列号组合成报文头
int<1>	序列号
string	payload	报文体，长度即为前面指定的payload长度

process kill命令包

Payload

1 [0c] COM_PROCCESS_KILL4 connection id

更多详情： http://dev.mysql.com/doc/internals/en/com-process-kill.html

process kill命令包类

/**
 * 
 * <pre><b>mysql process kill packet.</b></pre>
 * @author 
 * <pre>seaboat</pre>
 * <pre><b>email: </b>849586227@qq.com</pre>
 * <pre><b>blog: </b>http://www.gxlcms.com/;/pre>
 * @version 1.0
 * @see http://www.gxlcms.com/
 */public class ProcessKillPacket extends MySQLPacket {

 public byte flag = (byte) 0xfe; public int connectionId; @Override
 public void read(byte[] data) {
 MySQLMessage mm = new MySQLMessage(data);
 packetLength = mm.readUB3();
 packetId = mm.read();
 flag = mm.read();
 connectionId = mm.readInt();
 } @Override
 public void write(ByteBuffer buffer) { int size = calcPacketSize();
 BufferUtil.writeUB3(buffer, size);
 buffer.put(packetId);
 buffer.put(COM_PROCESS_KILL);
 BufferUtil.writeInt(buffer, connectionId);
 } @Override
 public int calcPacketSize() { return 5;
 } @Override
 protected String getPacketInfo() { return "MySQL Process Kill Packet";
 }

}