New Technologies

  • Java
  • Javascript
  • DTML
  • Dot Net
  • ASP .Net
  • C# .Net
  • PHP
Your Ad Here

Monday, December 15, 2008

Function to Convert given IP to Decimal


  • INET_ATON(expr)

Given the dotted-quad representation of a network address as a string, returns an integer that represents the numeric value of the address. Addresses may be 4- or 8-byte addresses.

mysql> SELECT INET_ATON('');
        -> 3520061480

The generated number is always in network byte order. For the example just shown, the number is calculated as 209×2563 + 207×2562 + 224×256 + 40.

INET_ATON() also understands short-form IP addresses:

mysql> SELECT INET_ATON(''), INET_ATON('127.1');
        -> 2130706433, 2130706433


When storing values generated by INET_ATON(), it is recommended that you use an INT UNSIGNED column. If you use a (signed) INT column, values corresponding to IP addresses for which the first octet is greater than 127 cannot be stored correctly. See Section 10.2, "Numeric Types".

  • To match a exact given IP range
  • select * from Customer_IP where
    ) and INET_ATON(IP_Start)<=INET_ATON('
  • INET_NTOA(expr)

Given a numeric network address (4 or 8 byte), returns the dotted-quad representation of the address as a string.

mysql> SELECT INET_NTOA(3520061480);
        -> '′


No comments:

Your Ad Here