[Samba4] Making Samba4 winbind compatible to Samba3 winbind

[Gerald (Jerry) Carter]

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Kai,

> as a first step in my SoC project, I'm looking into 
> making libnss_winbind from  samba 3 working with Samba4.
> In order to do so, I'm looking into porting the
> changes from Samba3's nsswitch/winbindd_nss.h to Samba4's 
> nsswitch/winbindd_nss.h.

I don't see a reason to use the libnss_winbind from
Samba 3 with winbindd in Samba 4.  The client and server
are two halves of the same coin.


> Some changes are straightforward as they're just some 
> new features I need to add. Sometimes however,
> the types are different.
> 
> Examples are the lm_resp_len and the nt_resp_len, both 
> are uint32 in samba3  and uint16_t in samba4. Another
> example is the require_membership_of_sid  string, which
> is a winbind_string (char[256]) in samba4 and a pstring
> (char[1024]) in samba3.

A lot of this goes back to the discussion about using
IDL for the pipe protocol.  I've had to on several
occassions work to ensure that a 32bit libnss_winbindd
could communicate with a 64bit winbindd.  This is a
big pain.

> Should I just change those? Is there a rationale in
> the types in samba4?

There's usually a very good reason for the diffeences
in Samnba 3.  The pstring/fstring change is just to
support a list of group names rather than a single one.
Should be a marshalled string in reality but until we nove
to IDL, static sized structures are the rule of the day.





cheers, jerry
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