Folks,
With the latest round of tweaks, I think the next version of the draft
will be essentially complete.
Except for needing to cover URI RRsets (RFC7553).
Unfortunately I'm stumped and am not sure what text to include to handle
it. Help!
The 'global' (right-most) label appears to be permitted from two
different sources, one is the same as for SRV (_proto) but the other is
from based on an "ENUM Service Parameter", although I can't find am
explicit definition of what that means. (Nor of "ENUMService
Parameter".) I assume it is meant to draw from
https://www.iana.org/assignments/enum-services/enum-services.xhtml#enum-services-1
but I can't figure exactly how, nor how to resolve drawing the global
value from two independent namespaces...
The relevant RFC7553 text is:
4.1. Owner Name, Class, and Type
The URI owner name is subject to special conventions.
Just like the SRV RR [RFC2782], the URI RR has service information
encoded in its owner name. In order to encode the service for a
specific owner name, one uses service parameters. Valid service
parameters are those registered by IANA in the "Service Name and
Transport Protocol Port Number Registry" [RFC6335] or as "Enumservice
Registrations [RFC6117]. The Enumservice Registration parameters are
reversed (i.e., subtype(s) before type), prepended with an underscore
(_), and prepended to the owner name in separate labels. The
underscore is prepended to the service parameters to avoid collisions
with DNS labels that occur in nature, and the order is reversed to
make it possible to do delegations, if needed, to different zones
(and therefore providers of DNS).
The easy part of this is to add entries to the global attrleaf trable for:
<c>URI</c>
<c>_dccp</c>
<c>
<xref target="RFC7553" />
</c>
<!-- -->
<c>URI</c>
<c>_sctp</c>
<c>
<xref target="RFC7553" />
</c>
<!-- -->
<c>URI</c>
<c>_tcp</c>
<c>
<xref target="RFC7553" /></c>
<!-- -->
<c>URI</c>
<c>_udp</c>
<c>
<xref target="RFC7553" />
</c>
<!-- -->
But this ignores handling names from enumservice.
Thoughts? Suggestion? Text?
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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