本文介绍了MySQL查询将CIDR转换为IP范围的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个表,其中包含一列作为CIDR值,如1.0.85.128/25
,我还有另外2列(start_ip_range和end_ip_range),我想填充那2列FROM CIDR列
I have a table which contains a column as CIDR values like 1.0.85.128/25
, I have 2 other columns (start_ip_range and end_ip_range), I want to populate those 2 column FROM CIDR column
Java代码可能如下所示:
Java code might look like as follows:
String[] parts = cidr.split("/");
String ip = parts[0];
int prefix;
if (parts.length < 2) {
prefix = 0;
} else {
prefix = Integer.parseInt(parts[1]);
}
String[] ipParts = ip.split("\\.");
int address = ((new Integer(ipParts[0]) << 24) & 0xFF000000)
| ((new Integer(ipParts[1]) << 16) & 0xFF0000)
| ((new Integer(ipParts[2]) << 8) & 0xFF00)
| (new Integer(ipParts[3]) & 0xFF);
int mask = (-1) << (32 - prefix);
int start = address & mask;
int end = start + (~mask);
如何将其转换为MySql查询.
How this can be transformed into MySql Query.
推荐答案
您可以进行转换
查询
SELECT
INET_NTOA(INET_ATON( SUBSTRING_INDEX(val, '/', 1))
& 0xffffffff ^ ((0x1 << ( 32 - SUBSTRING_INDEX(val, '/', -1)) ) -1 )) from_ip,
INET_NTOA(INET_ATON( SUBSTRING_INDEX(val, '/', 1))
| ((0x100000000 >> SUBSTRING_INDEX(val, '/', -1) ) -1 )) to_ip
FROM cidr;
样品表
CREATE TABLE `cidr` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`val` varchar(32) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `cidr` (`id`, `val`)
VALUES
(1, '192.168.2.12/24'),
(2, '192.168.2.12/25'),
(3, '1.0.85.128/25'),
(4, '192.168.2.12/32');
或者您可以在虚拟列中使用它.这样您就可以直接获得正确的值.
Or you can use it in virtual Columns. So you get direct the correct Value.
虚拟字段
CREATE TABLE `cidr1` (
`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
`val` VARCHAR(32) DEFAULT NULL,
`from_ip` VARCHAR(15) AS ( INET_NTOA(INET_ATON( SUBSTRING_INDEX(val, '/', 1)) & 0xffffffff ^ ((0x1 << ( 32 - SUBSTRING_INDEX(val, '/', -1)) ) -1 ))) PERSISTENT ,
`to_ip` VARCHAR(15) AS ( INET_NTOA(INET_ATON( SUBSTRING_INDEX(val, '/', 1)) | ((0x100000000 >> SUBSTRING_INDEX(val, '/', -1) ) -1 ))) PERSISTENT ,
PRIMARY KEY (`id`)
) ENGINE=INNODB DEFAULT CHARSET=utf8;
INSERT INTO `cidr1` (`id`, `val`)
VALUES
(1, '192.168.2.12/24'),
(2, '192.168.2.12/25'),
(3, '1.0.85.128/25'),
(4, '192.168.2.12/32');
MariaDB []> select * from cidr1;
+----+-----------------+--------------+---------------+
| id | val | from_ip | to_ip |
+----+-----------------+--------------+---------------+
| 1 | 192.168.2.12/24 | 192.168.2.0 | 192.168.2.255 |
| 2 | 192.168.2.12/25 | 192.168.2.0 | 192.168.2.127 |
| 3 | 1.0.85.128/25 | 1.0.85.128 | 1.0.85.255 |
| 4 | 192.168.2.12/32 | 192.168.2.12 | 192.168.2.12 |
+----+-----------------+--------------+---------------+
4 rows in set (0.00 sec)
MariaDB []>
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