Re: Proper Deinit? ldap_unbind_ext: Assertion `( (ld)->ld_options.ldo_valid == 0x2 )' failed

[Michael B Allen <mba2000@ioplex.com>]

On Tue, 17 Oct 2006 00:38:46 -0700
Howard Chu <hyc@symas.com> wrote:

> > If the bind fails, the ldap_unbind_ext function asserts:
> > 
> >   unbind.c:49: ldap_unbind_ext: Assertion `( (ld)->ld_options.ldo_valid == 0x2 )' failed.
> >   Aborted
> > 
> > What am I doing wrong?
> 
> You're confusing your variables, for one thing. You set up ld and then 
> try to unbind lx->ld which is obviously something different.
> 
> Also you should not progress any further if ldap_initialize fails. Your 
> sample there just prints an error message and then keeps on going, using 
> an ld variable that is certainly unmodified by ldap_initialize, most 
> likely completely uninitialized by you. You should be returning after 
> printing that error message...

That's not it. I introduced those errors when I posted the code.

The code asserts if I do simply:

    ret = ldap_initialize(&lx->ld, "ldap://foo.example.com";);
    if (ret == 0)
        ldap_unbind_ext(lx->ld, NULL, NULL);

Note that if I hexdump the first 128 bytes of the LDAP pointer I see
the ld_options member which I estimate to be at offset 0x54 is a 0x01:

00000:  60 03 05 0a 02 00 00 00 00 00 00 00 00 00 00 00  |`...............|
00010:  00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  |................|
00020:  00 00 00 00 b8 03 05 0a 85 01 00 00 00 00 00 00  |................|
00030:  00 00 00 00 05 00 00 00 00 00 00 00 00 00 00 00  |................|
00040:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|
00050:  01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  |................|
                    ^
                    ld_options
00060:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|
00070:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|

which makes sense because it corresponds to LDAP_INITIALIZED (and from
looking at ldap_initizlize this looks like what the value should be):

#define LDAP_INITIALIZED	0x1
#define LDAP_VALID_SESSION	0x2

but the ldap_unbind_ext call checks for 0x2 (LDAP_VALID_SESSION). So
that seems like a possible bug.

However, clearly I don't understand everything going on here because it
does NOT assert if I simply do:

    LDAP *ld;
    ret = ldap_initialize(&ld, "ldap://foo.example.com";);
    if (ret == 0)
        ldap_unbind_ext(ld, NULL, NULL);

Mike