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SubjectRe: [linux-cifs-client] Re: SMB support still missing?
Shirish S Pargaonkar wrote:
> This is what Steve had mailed me once, a while ago....
> Win9x and Windows ME and OS/2 only listen on port 139
> WindowsNT 4 (?) and later listen on port 445 and port 139.
> When you connect on the older port 139, you are supposed to send a
> RFC1001 (NBSS Session Request to indicate your client netbios name, but
> the problem is that you don't know the target netbios name of the server
> - which is why the either needs to support the fake name "*SMBSERVER" or
> the client needs to specify the "servernetbiosname=<name>" option on
> mount to identify which name on the server to try to connect to.
> So
> 1) try tcp connection on 445,
> then if it works send SMB negprot
> 2) else try tcp connection on port 139
> then if it works send nbss request to *SMBSERVER or to the name
> specified on servernetbiosname
> (cifs really should do an ASTAT command and list the valid names and
> find one if that approach fails but we don't have code for this yet)

This is all correct, and also note that W/9x systems do not support the
"*SMBSERVER" name.

On the other hand, the name was resolved somehow. The typical work-arounds
to not knowning the NBT name of the server are:
1) Use the name you just resolved (in this case, "CL0").
2) Send a Node Status Query and look for the first unique <20> name.

The second (as Steve explained to me a long time ago) is less reliable
because there are some applications out there which (incorrectly) register
names with a suffix byte of <20>.

Chris -)-----

"Implementing CIFS - the Common Internet FileSystem" ISBN: 013047116X
Samba Team -- -)----- Christopher R. Hertel
jCIFS Team -- -)----- ubiqx development, uninq.
ubiqx Team -- -)-----
OnLineBook -- -)-----
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