[avahi] Forward mDNS records to unicast DNS

[Tom Pusateri]

Just joined this list and saw this note in the archive:

>Hello everyone,
>
>I've been using Avahi for a while and find it useful. I have a rather
>unusual use case. I understand that Avahi can forward unicast DNS
>records to mDNS, but I would like to do the reverse (forward mDNS
>records to unicast.) Right now I just have a small DNS server that I
>wrote myself that gets its data from Avahi, but is there a better way?
>
>Kyle

Kyle,
	This is not such an unusual use case. The IETF has been working on a protocol that proxies between multicast DNS and unicast DNS. This is called a DNS Hybrid Proxy.

You can read about it here:

http://tools.ietf.org/html/draft-ietf-dnssd-hybrid-00

There’s a discussion about it on the DNS-SD mailing list:

https://www.ietf.org/mailman/listinfo/dnssd

Basically, it dynamically maps between a .local domain and a unique unicast name space. A subdomain is assigned to the local link that is delegated from the parent domain.

There is an implementation by Markus Stenberg and others involved with OpenWRT.
I also have a commercial implementation intended for bridges and routers that will automatically perform this mapping called hypd. I will be offering it for testing soon.

You could adapt your implementation to follow this spec.

Tom
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