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[dnssd] SRP: how to remove all published services?

Esko Dijk <esko.dijk@iotconsultancy.nl> Fri, 15 September 2023 14:17 UTC

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From: Esko Dijk <esko.dijk@iotconsultancy.nl>
To: "dnssd@ietf.org" <dnssd@ietf.org>
Thread-Topic: SRP: how to remove all published services?
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Date: Fri, 15 Sep 2023 14:17:25 +0000
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Subject: [dnssd] SRP: how to remove all published services?
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A question - in 3.2.5.5.1., Removing all published services, we have:

   To remove all the services registered to a particular host, the SRP requestor retransmits its most recent update with an Update Lease option that has a LEASE value of zero.

I wonder how this exactly works in the following case. If I've registered service A, and 10 minutes later registered service B in addition (without mentioning A in the second SRP Update), then both services A and B are actively registered.  Now I send the "most recent SRP Update" which has only service B to the SRP registrar, with a LEASE value of zero.
Wouldn't it be that only service B is removed (lease set to 0) while service A stays active?

If so, we may need to clarify this text I think. Because it's not always the "most recent SRP Update" then.
(If not so, I'm having trouble understanding how the LEASE value in the SRP Update does apply to all currently registered services....)

Esko

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