From:             mikerushton at hotmail dot co dot uk
Operating system: Windows Vista
PHP version:      5.3.1
PHP Bug Type:     Filter related
Bug description:  FILTER_VALIDATE_IP incorrectly validates a compressed 
IPv4-mapped IPv6 address

Description:
------------
FILTER_VALIDATE_IP validates the incorrect 0:::255.255.255.255 and does 
not validate the correct 0::255.255.255.255

According to RFC 5321, the correct syntax is:

[IPv6-hex *3(":" IPv6-hex)] "::" [IPv6-hex *3(":" IPv6-hex) ":"] IPv4-
address-literal

This does not allow for three consecutive colons.

Reproduce code:
---------------
// First

filter_var('FFFF:::255.255.255.255', FILTER_VALIDATE_IP);

// Second

filter_var('FFFF::255.255.255.255', FILTER_VALIDATE_IP);

Expected result:
----------------
// First

bool(false)

// Second

string(21) 'FFFF::255.255.255.255'

Actual result:
--------------
// First

string(22) 'FFFF:::255.255.255.255'

// Second

bool(false)

-- 
Edit bug report at http://bugs.php.net/?id=50830&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=50830&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=50830&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=50830&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=50830&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=50830&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=50830&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=50830&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=50830&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=50830&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=50830&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=50830&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=50830&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=50830&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=50830&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=50830&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=50830&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=50830&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=50830&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=50830&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=50830&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=50830&r=mysqlcfg

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