In message <20130226223612.40b74301a...@drugs.dv.isc.org>, Mark Andrews writes: > > In message <512cc4fd.2020...@si6networks.com>, Fernando Gont writes: > > On 02/26/2013 09:19 AM, Ted Lemon wrote: > > > Homenets aren't zeroconf--there has to be a way, at a minimum, to > > > communicate a prefix and a DNS server address. This can be done > > > with RA, or with RA+stateless DHCPv6, or with stateful DHCPv6. So > > > in a homenet we can expect that there _will_ be a mechanism that > > > _could_ be made to work for setting up DNS; the questions are: > > > > > > (1) Which ways do we support, if any? > > > > Stupid question: > > Can we enforce requirements on host implementations as a result of > > homenet? (e.g., among all the nice pieces of DDNS, how many of them are > > widely implemented? and if not widely implemented, can we push changes > > in this area?) > > Windows and MacOS both support DDNS. You have to turn the latter on. > Thats well over half of homenet boxes. > > > If we cannot do that, but can spec functionality in, say, home routers, > > then something along the lines of what I sketched in my previous email > > might make more sense. > > > > > > > (2) How do we resolve the question of who is the local DNS server? > > > > You mean the authoritative DNS server for nodes in the local network? > > You make a SOA query for the name you want to add. You remove > labels until you get a SOA response (there are optimisations that > can be applied to make this quicker). You lookup the NS RRset now > that you have the containing zone. If the master server (see the > SOA record) is in the NS RRset you send to it otherwise you try all > the NS's until you get SUCCESS or REFUSED. If you get NOTIMP you > move onto the next server. When you have exhausted all the servers > you stop. > > NOTIMP indicates that update / update forwarding is not supported/enabled. > REFUSED means you hit a acl. > SUCCESS means you update was accepted. > > This is bog standard update processing. It works with split namespaces.
Code to do the above has been part of libresolv/libbind since 1997. nsupdate calls that code to do its work. > If you are updating PTR records you look for CNAME records with the > initial SOA query in case RFC 2317 delegations are present and you > update the owner name of the PTR to match the target of the CNAME. > You then restart the process. > > > > As far as I can tell, this whole notion has been punted in favor of > > > multi-subnet mDNS; my concern is that we are going to wind up with a > > > new protocol that's a weird amalgam of mDNS and DNS but shares little > > > code with existing implementations of either protocol/ > > > > Since I was not involved in such discussions, just double-checking: I > > guess the whole argument for DNS had to do with > > * No need for authoritative servers? > > * Availability of "local" zones, as opposed to global zones? > > * Something (technical :-) ) else? > > > > I think that it shouldn't be hard to come up with something to make DNS > > work with local zones, without relying on multicast (and thus avoiding > > the need to do mDNS). If there's interest in exploring this path, I > > could give this some thought -- just checking the mDNS thing is not > > casted into stone, such that I avoid wasting time unnecessarily... > > > > Thanks! > > > > Best regards, > > -- > > Fernando Gont > > e-mail: ferna...@gont.com.ar || fg...@si6networks.com > > PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1 > > > > > > > > > > -- > > Fernando Gont > > SI6 Networks > > e-mail: fg...@si6networks.com > > PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 > > > > > > > > > > _______________________________________________ > > homenet mailing list > > homenet@ietf.org > > https://www.ietf.org/mailman/listinfo/homenet > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org > _______________________________________________ > homenet mailing list > homenet@ietf.org > https://www.ietf.org/mailman/listinfo/homenet -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
