More questions about WINS, interfaces, etc
Philip A. Prindeville
philipp at enteka.com
Thu Sep 18 18:21:55 GMT 1997
> On Thu, 18 Sep 1997, Philip A. Prindeville wrote:
> > I have yet another question about WINS and DNS... Why can't the
> > DNS be used as the database of reference for name-to-address
> > mappings when using NB over TCP/IP?
> we're working on that, for samba-2.
I would be interested in collaborating on that.
> > Assuming you could easily
> > make incremental changes to the name server and propagate them
> > out to all of the secondaries, then why bother having nmbd (or
> > whatever) keep in-memory tables at all?
> cacheing, to reduce network traffic. also, nmbd is a single process.
> we'd need to add a non-blocking, state-based way to resolve dns names.
> (gethostbyname() is blocking...)
At least under Solaris, there is a thread-safe gethostbyname_r()
function that could be used. I don't know how portable this is,
> > On the subject of that, who would be responsible for adding the
> > name to the DNS: Samba or the DHCP server? What about
> > deletions?
> the DNS administrator. NOT samba. and NOT the DHCP server. samba has
> nothing directly to do with DHCP daemons or named daemons.
I'm assuming that a machine, say that has a network identity of
"FIDO", gets an address lease from a DHCP server, and then tries to
defend the name via NetBIOS. Having succeeded, the name should
probably be re-integrated into the DNS with the leased address.
Of course, this happens too often and too dynamically to involve
the intervention of a hostmaster.
> > I've modified source/interface.c to handle interface names instead
> > of addresses/netmasks... I thought this might be nicer since if
> > you renumber a network or change a host's address, the fewer
> > places you have to change its IP address the better. So with these
> > patches (I'm working with 1.9.16p11 -- sorry)
> i don't care: the samba team deals with patches from different versions
> all the time. we prefer diff -u, if you can generate it. patch <
> diff_file usually deals with things automatically, and creates .rej files
> for rejected bits, which have to be added by hand - no problem there.
Hmmmm... My diff doesn't understand -u. Where can I get one that
> > you can say something
> > like:
> > interfaces = le0 le1
> > or
> > interfaces = all
> oh, _good_! an excellent addition.
I'm just not sure about one thing, however: in the original code
they seem to ignore the broadcast address and force the address to
be the all-ones host address. Which is what the broadcast address
should be anyway, unless you have misconfigured or incredibly old
> Luke Kenneth Casson Leighton (lkcl at switchboard.net)
> "Deal with difficult problems while they are still easy"
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