netibios name len
Christopher R. Hertel
crh at ubiqx.mn.org
Thu Nov 21 17:01:41 GMT 2002
On Thu, Nov 21, 2002 at 03:17:05PM +0100, Paolo Abeni wrote:
> hi there,
> I had some troubles while configuring a samba printer. The "host"
> component of the netbios resource name was longer than 15 bytes and my
> smbclient (version 2.2.5) truncates the netbois host name at that
NetBIOS names are 16 bytes maximum, and Microsoft reserves the 16th byte
for special use.
> Looking at rfc 1002 I have found a 64 byte limit for resource name, but
> apparently there is no strict constraint for the host name, so I thought
> it could be useful to remove this hard-coded limit and admit 64 byte
> long netbios names. is it right???
I'm afraid not.
As I said above, NetBIOS names are 16 bytes maximum and always have been.
They are encoded to a format that is 32-bytes long and then encoded again
before they are sent on the wire. Check your Ethereal traces.
The 63-byte limit is for a label in the scope ID. It is the same limit
that was originally imposed upon DNS labels. It's 63 bytes because the
value must fit into a 6-bit field. The two additional bits are used as
See the docs at http://ubiqx.org/cifs/NetBIOS.html
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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