[jcifs] Issue listing "smb://"

[Eric Glass]

> 
> If given "SMB://"
> 
> 1) Look for the __MSBROWSE__ name and choose one of the responding nodes.
>    Cross your fingers and hope that it's been up long enough that it has
>    achieved a reasonable degree of convergence.
> 

Currently, jCIFS just does #1 (__MSBROWSE__).  I don't know that we
have any means of specifying we are in "P" mode, so I don't think we'd
ever skip this; the earlier patch just catches the
UnknownHostException that occurs if no __MSBROWSE__ is found.

> 2) If #1 fails, contact the NBNS for a DMB (any DMB... If you've got a
>    default workgroup name, try that.  Else, try *<1B> which may also fail.
> 
> 3) If in 'P' mode skip step 1, if in 'B' mode skip step 2.
> 
> 4) If none of that works the query fails.
> 

The patch falls back to doing:


    String host = Config.getProperty("jcifs.smb.client.domain");
    return UniAddress.getByName(host, true);


This eventually winds up calling UniAddress.lookupServerOrWorkgroup;
this gets kind of funky since it loops through the defined
"jcifs.resolveOrder" list.  So depending on how the resolve order is
specified, this could give mixed results.

I think this fallback could probably be better refined to something
like this (and I think this more-or-less captures Chris' process):


    String host = Config.getProperty("jcifs.smb.client.domain", "*");
    NbtAddress address = NbtAddress.getByName(host, 0x1b, null,
            NbtAddress.getWINSAddress());
    return new UniAddress(address);


So if the __MSBROWSE__ fails, the NBNS is queried using <1B> for
"jcifs.smb.client.domain" if set, or "*" otherwise.  I *think* this
should wind up getting the DMB for the default workgroup, or any DMB
(if no default workgroup is specified and the NBNS is Samba).

Sound good?


Eric