[jcifs] SMB URL
Christopher R. Hertel
crh at ubiqx.mn.org
Sun Jul 7 10:35:09 EST 2002
On Sat, Jul 06, 2002 at 08:03:16PM -0400, Michael B. Allen wrote:
> On Sat, 6 Jul 2002 15:47:15 -0500
> "Christopher R. Hertel" <crh at ubiqx.mn.org> wrote:
>
> > I need to get a new SMB URL draft into the IETF. The current is set to
> > expire.
> >
> > Some quick thoughts:
> >
> > - I went over the list of parameters that can be set using the ?<query>
> > syntax and removed a few (per Mike's suggestion, IIRC). The current
> > list is:
> >
> > nbt_param = ( ( "NBNS=" | "WINS=" ) host )
> > | ( "NBDD=" host )
> > | ( "SCOPE=" hostname )
> > | ( "CALLED=" netbiosname )
> > | ( "CALLING=" netbiosname )
> > | ( ( "WORKGROUP=" | "NTDOMAIN=" ) nbtname )
> > | ( "RESOLVE=" nbt_resorder )
>
> I would rather you introduce only the obviously useful parameters so that
> we can incorporate that functionality into clients and then gradually
> determine what other parameters would be useful. It would be much better to
> add additional parameters later rather than have to remove some after
> realizing they weren't appropriate. For example it's not clear that NBDD
> would be useful or even applicable
I agree about NBDD. No one implements it, and NBT browsing works better
without it.
> whereas parameters to specify the local
> interface to bind to or an lmhosts file to use are examples of parameters
> that might be necessary for the client to function properly.
How so? That sound's like really dangerous ground. Also, recall that a
URL is supposed to be something that someone else can give you. Eg. you
should be able to click on an SMB link on the jCIFS page and get a file,
just as you would with an FTP URL.
If we set up a "public" (read "nailed down, unchangeable, static") WINS
server we could even supply the NBNS parameter. Just about everything in
the list is highly portable. The exception *might* be the WORKGROUP
option, but even that... I am working on that one...
> Also, the
> RESOLVE parameter suggests that clients must provide resolve order
> functionality which is more sophisticated than I think most clients would
> be willing to support. I'd say only NBNS/WINS and SCOPE would be the minmum
> introductory set although CALLED *might* be useful for clients that do not
> have sophisticated resource resoultion.
jCIFS and smbclient allow specification of resolve order, and so do
several other tools I've seen. You would need to be able, at minimum, to
specify B, P, M, or H mode. All clients do that (as far as I know).
The other option is simply a way to include DNS into the ordering.
As for CALLED and CALLING, I doubt that people will use them much, but
they might. Adding CALLED is important because, for example, I might be
connecting to a W/95 box across the country. I have the DNS name but not
the CALLED name, and W/95 doesn't support *SMBSERVER. What do I do?
> The WORKGROUP/NTDOMAIN parameters
> are redundant (and thus confusing) because you can specify the ntdomain in
> the authentiocation credentials and the workgroup in the overloaded
> authority component.
Different purpose. We talked previously about the fact that you can
authenticate in one domain but access services in another. Not a big
deal, since the server name is independent of the authentication domain.
Anyway, the purpose of the ?WORKGROUP= parameter is to designate the
default workgroup (or NTDOMAIN) for browsing.
> > - In the current draft, you can specify:
> >
> > smb://<NetBIOS_NAME>.<ScopeID>
> >
> > I'm thinking that it would be better to disallow the specification of
> > the scope in the server field. Instead, you would have to write the
> > above as:
> >
> > smb://<NetBIOS_NAME>?SCOPE=<ScopeID>
>
> DEFINATELY. Supporting both DNS and NetBIOS is tough enough. Add Active
> Directory and a legacy scopeid and they just won't implement it (hint,
> hint).
Hmmm.... you like that idea. Okay. ;)
> > - This is the controversial one...
> > In the current draft, you can type:
> >
> > smb://<name>
> >
> > and if <name> resolves to a workgroup name you will get the browselist
> > for that workgroup (assuming it's available somewhere). I am thinking
> > that we could change that to:
> >
> > smb://?WORKGROUP=<name>
> >
> > to get the browselist for that workgroup.
>
> Why? I don't understand. Where did you get this from? Doesn't USENET use
> something like news:GROUP. If you're going to change it I would do that.
> But I think it's been established that the current scheme works and that
> there are no fundamental issues with it so ...
That was one of the suggestions from the RFC2396 authors. Could do... I
figured that, since we already had the ?<keyword>= syntax going why not
put it there?
Still, I do like that... It may also work for the LDAP query to get the
AD server list. Thinking...
Can *anyone* show me how to do an LDAP query to get the server list from
Active Directory?!?!
I have to get the new draft in by Monday. I will do so, but it is a
draft. Change is likely.
Chris -)-----
--
Samba Team -- http://www.samba.org/ -)----- Christopher R. Hertel
jCIFS Team -- http://jcifs.samba.org/ -)----- ubiqx development, uninq.
ubiqx Team -- http://www.ubiqx.org/ -)----- crh at ubiqx.mn.org
OnLineBook -- http://ubiqx.org/cifs/ -)----- crh at ubiqx.org
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