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Subject: Re: timeout in LDAP access
From: Denis Excoffier <cygwin AT Denis-Excoffier DOT org>
In-Reply-To: <20140707110714.GJ1803@calimero.vinschen.de>
Date: Tue, 8 Jul 2014 21:22:02 +0200
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References: <20140618083304 DOT GV23700 AT calimero DOT vinschen DOT de> <20140618180102 DOT GA27055 AT calimero DOT vinschen DOT de> <FEEBC1A4-B147-45C1-A5AC-F5B9108E998F AT Denis-Excoffier DOT org> <20140623090959 DOT GA1803 AT calimero DOT vinschen DOT de> <C2FB35D9-AE47-4461-8A94-20605D5EB996 AT Denis-Excoffier DOT org> <20140624155851 DOT GJ1803 AT calimero DOT vinschen DOT de> <20140625101526 DOT GO1803 AT calimero DOT vinschen DOT de> <E760D646-FFCB-434C-B990-7783DC011326 AT Denis-Excoffier DOT org> <20140625211355 DOT GA25116 AT calimero DOT vinschen DOT de> <E3509AAC-C4A0-4293-988F-E94BF2421180 AT free DOT fr> <20140707110714 DOT GJ1803 AT calimero DOT vinschen DOT de>
To: cygwin AT cygwin DOT com


On 2014-07-07 13:07, Corinna Vinschen wrote:

> 
> For enumerating a non-primary domain, I get exactly two calls to
> cyg_ldap::open which actually do a connect.  The first call opens the
> domain for enumeration.  The second call opens the primary domain (NULL)
> to fetch the POSIX offset value for the foreign domain (see my document
> explaining the POSIX offset stuff), unless the application or one of
> its parent processes already fetched the POSIX offset for this domain.
> 
> I don't observer any further calls to connect in this scenario.
> 
> 
In your preliminary documentation (your message dated 2014-06-25, please
correct "seet" in it), trustPosixOffset is "some arbitrary 32 bit value",
ie including 0.

In your code (fetch_posix_offset), td->PosixOffset is used to record the
value and also (when 0) to record that the value has still not been
fetched.

I have encountered this case in real life. The domain admins have set
the trustPosixOffset of the secondary domain to zero. This value is therefore
never recorded and the cldap->open occurs again and again.

Hope this helps.

Regards,

Denis Excoffier.


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