[107153] in North American Network Operators' Group
RE: interger to I P address
daemon@ATHENA.MIT.EDU (Boyd, Benjamin R)
Wed Aug 27 12:38:33 2008
Date: Wed, 27 Aug 2008 11:38:27 -0500
From: "Boyd, Benjamin R" <Benjamin.R.Boyd@windstream.com>
To: "Andree Toonk" <andree+nanog@toonk.nl>, <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
>>> The harder way:
>>>
>>> Decimal: 1089055123
>>> Hex (dashes inserted at octals): 40-E9-A9-93 Decimal (of=20
>each octet):=20
>>> 64-233-169-147 IP Address: 64.233.169.147
>>
>> The Python way
>>
>> >>> import socket, struct
>> >>> socket.inet_ntoa(struct.pack('>l', 1089055123))
>> '64.233.169.147'
>
>The Perl way:
>
>sub ntoa
>{
> my $one =3D shift;
> my $four =3D $one & 0xff;
> $one >>=3D 8;
> my $three =3D $one & 0xff;
> $one >>=3D 8;
> my $two =3D $one & 0xff;
> $one >>=3D 8;
> return "$one.$two.$three.$four";
>}
>
>#or in one line, like ipcalc does:
>sub ntoa_in_one_line { join(".", unpack("CCCC", pack("N", $_[0]))); }
>
>print ntoa(1089055123) . "\n";
>print ntoa_in_one_line(1089055123) . "\n";
>
>
The PHP way:
function convertIntegerToIpv4($integer)=20
{
$max_value =3D pow(2,32); //4,294,967,296=20
$bug_fix =3D 0;
settype($integer, float);
if($integer > 2147483647) $bug_fix =3D 16777216;
=20=20=20=20
if(is_numeric($integer))=20
{=20
if ($integer >=3D $max_value || $integer < 0)
{
return ('Not a valid IPv4 integer');
}
$ip =3D (sprintf("%u.%u.%u.%u",
$integer / 16777216,
(($integer % 16777216) + $bug_fix) / 65536,
(($integer % 65536) + $bug_fix / 256) / 256,
($integer % 256) + $bug_fix / 256 / 256
)
);=20
return($ip);
}
else {
return('');
}
}
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