perl-ldap-dev

Net::LDAP and mod_perl

[Michael F. <mf...@ho...>]

Hi,

I am using Net::LDAP under a mod_perl environment and have one Problem:
the Socket is alive as long as the apache-child is alive.

I tried several things to fix it:

- calling unbind at finalization does not help (netstat-status
CLOSE_WAIT). 

- i tried to close the socket in the Net::LDAP Module after unbinding:
------------  
 my $msg = $ldap->_sendmesg($mesg);
  $ldap->{net_ldap_socket}->shutdown(2);
  return $msg;
}
------------
The netstat-status after this is close, but the entry does not
disappear.


Have you got any ideas that could help me? 


thanks
Michael

Re: Net::LDAP and mod_perl

[Graham B. <gb...@po...>]

On Thu, Feb 28, 2002 at 05:00:55PM +0100, Michael Frankl wrote:
> Hi,
> 
> I am using Net::LDAP under a mod_perl environment and have one Problem:
> the Socket is alive as long as the apache-child is alive.

Sounds like you are storing $ldap in a global variable.

> I tried several things to fix it:
> 
> - calling unbind at finalization does not help (netstat-status
> CLOSE_WAIT). 

CLOSE_WAIT is the normal thing to happen.

The kernel puts all sockets into CLOSE_WAIT upon close. THis is to
prevent reuse of the port number and then getting some rouge packets
from the net that were actually sent to the previous process.

Graham.


> 
> - i tried to close the socket in the Net::LDAP Module after unbinding:
> ------------  
>  my $msg = $ldap->_sendmesg($mesg);
>   $ldap->{net_ldap_socket}->shutdown(2);
>   return $msg;
> }
> ------------
> The netstat-status after this is close, but the entry does not
> disappear.
> 
> 
> Have you got any ideas that could help me? 
> 
> 
> thanks
> Michael
> 
> 
> 

Re: Net::LDAP and mod_perl

[Chris R. <chr...@me...>]

Graham Barr <gb...@po...> wrote:
> On Thu, Feb 28, 2002 at 05:00:55PM +0100, Michael Frankl wrote:
>> Hi,
>> 
>> I am using Net::LDAP under a mod_perl environment and have one Problem:
>> the Socket is alive as long as the apache-child is alive.
> 
> Sounds like you are storing $ldap in a global variable.
> 
>> I tried several things to fix it:
>> 
>> - calling unbind at finalization does not help (netstat-status
>> CLOSE_WAIT). 
> 
> CLOSE_WAIT is the normal thing to happen.
> 
> The kernel puts all sockets into CLOSE_WAIT upon close. THis is to
> prevent reuse of the port number and then getting some rouge packets

Rouge, or rogue? ;-)

> from the net that were actually sent to the previous process.
> 
> Graham.

Some LDAP servers treat an unbind as a request to close the socket, but
others do not. I suspect you need to close the socket in the client, and
you would do that by setting $ldap to undef; or letting $ldap go out of
scope so that the destructor gets called, as it is the destructor that
closes the socket. (If memory serves.)

Cheers,

Chris