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Bug #42512 ip2long('255.255.255.255') should return 4294967295 on 64-bit PHP
Submitted: 2007-09-01 18:10 UTC Modified: 2007-09-01 18:38 UTC
From: jr-php2 at quo dot to Assigned: derick (profile)
Status: Closed Package: Network related
PHP Version: 5.2.4 OS: Linux x86-64
Private report: No CVE-ID: None
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 [2007-09-01 18:10 UTC] jr-php2 at quo dot to 
Description:
------------
On 64-bit platforms, ip2long() returns a positive result for IP addresses >= 128.0.0.0. This is expected.

However, there is *one* case in which it will return a negative result: when the specified address is 255.255.255.255.

This inconsistency doesn't make sense. Yes, the documentation does say that ip2long() returns -1 for 255.255.255.255, but that should only be the case on 32-bit platforms, where all addresses >= 128.0.0.0 return a negative result.

Reproduce code:
---------------
echo "ip2long('255.255.255.254') = ", ip2long('255.255.255.254'), "\n";
echo "ip2long('255.255.255.255') = ", ip2long('255.255.255.255'), "\n";

Expected result:
----------------
ip2long('255.255.255.254') = 4294967294
ip2long('255.255.255.255') = 4294967295

Actual result:
--------------
ip2long('255.255.255.254') = 4294967294
ip2long('255.255.255.255') = -1

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 [2007-09-01 18:29 UTC] derick@php.net 
Confirmed, and testing a patch.
 [2007-09-01 18:38 UTC] derick@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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