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 | 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 | 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
/** * *mysql process kill packet.* @author *seaboat*email: 849586227@qq.com*blog: http://www./;/pre> * @version 1.0 * @see http://www./ */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"; } }
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