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Re: How get more detailed error information than the provided by ldap_err2string?
closing thread::
Hi P,
I would like to thank you and Howard for your help/direction and all others for the hard work on openldap.
Thanx for not simply giving the code and instead instigating the investigation process.
I've got the additionally info using ldap_get_option/ LDAP_OPT_DIAGNOSTIC_MESSAGE.
will evaluate and try rewriting it using async calls. But for now, i'm very happy i got it working.
Appreciated for the patience and help.
-wm
On 09/03/2014, at 05:46, Pierangelo Masarati <pierangelo.masarati@polimi.it> wrote:
> On 03/08/2014 11:39 PM, Werner M wrote:
>>
>> On 08/03/2014, at 18:01, Pierangelo Masarati <pierangelo.masarati@polimi.it> wrote:
>>
>>> On 03/08/2014 09:27 PM, Werner - Google wrote:
>>>> Hi,
>>>>
>>>> I've the sample code bellow, and when i intentionally put the wrong
>>>> credentials, i get from "ldap_err2string( rc ) the error message:
>>>> "Invalid credentials".
>>>>
>>>> But monitoring network traffic with wireshark, i can see that on the
>>>> bindResponse packet that returns from the server, i also get a more
>>>> detailed message. In my/this test case,
>>>>
>>>> "errorMessage: 80090308: LdapErr: DSID-0C0903AA, comment:
>>>> AcceptSecurityContext error, data 525, v1772"
>>>>
>>>> attached is also an image of the wireshark showing what i mean.
>>>
>>> ldap_err2string() (deprecated, BTW, like most of the functions you're using in your example code) maps an error code onto a static string. What you're looking for is the contents of the diagnosticMessage in a LDAP result. You can get it with ldap_parse_result(), but you need a LDAPMessage first.
>>>
>>> See the client tools for an example of usage of non-deprecated functions that return the contents of the diagnosticMessage.
>>>
>>> p.
>>>
>>
>> Hi Pierangelo,
>> I have looking a lot at the client tools, but all of them use the asynchronous functions/metodoly (ldap_bind/ldap_search_ext()..), and the code i'm trying to fix , has it's entire logic written based on the synchronous versions of bind/search.
>>
>> And i could not find a way of using ldap_parse_result in this situation. I'm probably overlooking and/or not understanding how this works correctly. If you could point me in the correct direction if it's doable with the synchronous versions, i would appreciate it much.
>
> If the LDAP handle is being used exclusively for one operation at a time (as it is presumably, since it uses synchronous operations) you can get that message using ldap_get_option() with LDAP_OPT_DIAGNOSTIC_MESSAGE after the operation completed, as already indicated by Howard.
>
> We already pointed you in the right direction: look at the client tools, they usually do everything is worth doing in what is thought to be the right way. If you want a quick'n'dirty answer, use the synchronous calls. If you want more information, it's a lot of work to collect it using calls like ldap_get_option(), which is basically a workaround. Asynchronous calls are way much powerful. Yes, you'll probably have to redesign and then rewrite your code.
>
> p.
>
>>
>> Thanks
>> -wm
>>
>>
>>
>>>>
>>>> Question is, is there a way i could retrieve this more detailed message?
>>>>
>>>> Thanks in advance for any help
>>>> Regards.
>>>>
>>>> ---
>>>> sample code:
>>>>
>>>>
>>>> if ( (ld = (LDAP *)ldap_init( pHostName, iPortNum )) == NULL ) {
>>>> perror( "ldap_init failed. Reason?:" );
>>>> exit ( 1 );
>>>> }
>>>>
>>>> if ( (rc=ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version)) !=
>>>> LDAP_SUCCESS ){
>>>> fprintf( stderr, "ldap_set_option(LDAP_OPT_PROTOCOL_VERSION): %s\n",
>>>> ldap_err2string( rc ) );
>>>> exit( 1 );
>>>> }
>>>>
>>>> if ( (rc=ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_OFF)) !=
>>>> LDAP_SUCCESS){
>>>> fprintf( stderr, "ldap_set_option(LDAP_OPT_REFERRALS): %s\n",
>>>> ldap_err2string( rc ));
>>>> exit( 1 );
>>>> }
>>>>
>>>> rc = ldap_simple_bind_s( ld, "auth_dn", "auth_pw" );
>>>>
>>>>
>>>> if ( rc != LDAP_SUCCESS ) {
>>>> fprintf( stderr, "ldap_simple_bind_s() Failed: %s [%d]\n",
>>>> ldap_err2string(rc), rc);
>>>> ldap_unbind_s(ld); /* try unbind the failed connection anyway */
>>>> exit ( 1 );
>>>> }
>>>>
>>>>
>>>
>>>
>>> --
>>> Pierangelo Masarati
>>> Associate Professor
>>> Dipartimento di Scienze e Tecnologie Aerospaziali
>>> Politecnico di Milano
>>>
>>
>>
>>
>
>
> --
> Pierangelo Masarati
> Associate Professor
> Dipartimento di Scienze e Tecnologie Aerospaziali
> Politecnico di Milano
>