[TYPO3-core] RFC: #8588: Admin tools -> User Admin -> List users online broken when [BE][lockIP] is set to < 4

[Uschi Renziehausen]

Steffen Kamper wrote:
Hi,

+1 by reading and testing

Uschi
> Hi,
> 
> Type: Bugfix
> 
> Bugtracker references:
> http://bugs.typo3.org/view.php?id=8588
> 
> Branches: 4.1, 4.2, trunk
> 
> Problem:
> I've set [BE][lockIP] to 0. Then Admin tools -> User Admin -> List users 
> online is broken:
> 
> Warning: gethostbyaddr() [function.gethostbyaddr]: Address is not a 
> valid IPv4 or IPv6 address in 
> /typo3_src-4.2.0/typo3/sysext/beuser/mod/index.php on line 1558
> 
> In the column "host", the IP adress is shown truncated (see attached 
> screenshot).
> 
> Furthermore the drop down list to get back to Compare User Settings is 
> inaccessibile then.
> 
> Solution:
> check if gethostbyaddr() fails with
> $hostByAddr = @gethostbyaddr($session['ses_iplock']) ? 
> gethostbyaddr($session['ses_iplock']) : $session['ses_iplock'];
> 
> Maybe it should be documented better, as setting to 0 is invalid and 
> results in 1
> 
> vg Steffen
>