[dnssd] Paul Wouters' Discuss on draft-ietf-dnssd-update-lease-08: (with DISCUSS and COMMENT)

Paul Wouters via Datatracker <noreply@ietf.org> Wed, 09 August 2023 16:47 UTC

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Subject: [dnssd] Paul Wouters' Discuss on draft-ietf-dnssd-update-lease-08: (with DISCUSS and COMMENT)
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Paul Wouters has entered the following ballot position for
draft-ietf-dnssd-update-lease-08: Discuss

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I wonder why there is no method for a "leaving client" to cleanup and delete
its record. Eg a laptop's "lid down" event could be used to delete the records
it has a LEASE on. It could do this without any wire changes by requesting a
LEASE value of 0. It could even use a KEY_LEASE value of non-zero to still keep
a claim to the name but signal that it is currently not available. Is there a
reason this was left out of the draft? As the stated goal of the draft is a
more up to date DNS zone, this seems like a logical part of the solution to me.


        The Update Lease option SHOULD specify a time interval that is no
        shorter than 1800 seconds (30 minutes). Requestors MAY specify a
        shorter lease if they anticipate that the records being updated
        will change sooner than 30 minutes.

I feel this section tries to impose a restriction that it immediately breaks.
As implementer there is nothing I can do with this section except ignore this

There is also no way of deleting by setting an update with 0 seconds (as one
"SHOULD" not use < 3600).

        If the Update Lease of a resource record elapses without being
        refreshed, the server MUST NOT return the expired record in
        answers to queries. The server MAY delete the record from its

The meaning here is open to interpretation. If the record is in the "database",
one could assume it is also being served. And if the record must not be returned
why is there a MAY to keep it in a "database". I think the second sentence is better
just removed and left to implementations to handle.

NIT: [I-D.ietf-dnssd-srp]  is not pointing to the latest version