[dnssd] draft-ietf-core-rd-dns-sd
Dave Thaler <dthaler@microsoft.com> Thu, 19 July 2018 17:33 UTC
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From: Dave Thaler <dthaler@microsoft.com>
To: "dnssd@ietf.org" <dnssd@ietf.org>
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Date: Thu, 19 Jul 2018 17:33:08 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dnssd/g81ZZSYJ0hFqgFh41GrA0nTDWyk>
Subject: [dnssd] draft-ietf-core-rd-dns-sd
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Regarding the problem with mapping rt values to information in DNS-SD records...
Example from doc:
> An example of this more specific <ServiceType> is "light._sub._oic._udp".
Would this work:
1) Service type name ("_oic" above): change "exp" to have the value to copy it from, instead of exp simply being Boolean
2) Make the subtype ("light" above): make this be some hash of the full rt value. This works for URIs as well as arbitrary length rt values, at the expense of a tiny risk of collision.
3) Put the actual rt value into a TXT record just like the if value (which can also be a URI btw) already is. In the rare case of collision, and app could use this to do further filtering.
?
Dave
- [dnssd] draft-ietf-core-rd-dns-sd Dave Thaler