Re: [rtcweb] Call for review

Justin Uberti <juberti@google.com> Wed, 06 March 2019 03:08 UTC

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From: Justin Uberti <juberti@google.com>
Date: Tue, 5 Mar 2019 19:08:08 -0800
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To: Roman Shpount <roman@telurix.com>
Cc: Ted Hardie <ted.ietf@gmail.com>, RTCWeb IETF <rtcweb@ietf.org>
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Subject: Re: [rtcweb] Call for review
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On Tue, Mar 5, 2019 at 1:32 PM Roman Shpount <roman@telurix.com>; wrote:

> On Tue, Mar 5, 2019 at 4:12 PM Justin Uberti <juberti@google.com>; wrote:
>
>> Roman, was there specific text in mdns-ice-candidates that you think is
>> contradicted by ip-handling-ex-mdns? The goal was for the former document
>> to describe the technique and the latter to describe when it should be
>> applied.
>>
>
> According to Section 3.1 of ietf-rtcweb-mdns-ice-candidates (
> https://tools.ietf.org/html/draft-ietf-rtcweb-mdns-ice-candidates-02#section-3.1)
> all host candidates are replaced with mDNS names. Based on
> draft-uberti-ip-handling-ex-mdns,  RFC4941 IPv6 addresses in mode 2.1 can
> be skipped and left as is. Some language likely need to be added to ietf-rtcweb-mdns-ice-candidates
> section 3.1 to specify that mDNS encoding is optional, at least for RFC4941
> IPv6 address.
>

This has been addressed in the editor's copy of the mdns-ice-candidates
draft - see
https://rtcweb-wg.github.io/mdns-ice-candidates/draft-ietf-rtcweb-mdns-ice-candidates.html#rfc.section.3.1
.


> Furthermore, mdns-ice-candidates section 3.1 specifies that mDNS names can
> be re-used. These re-used mDNS names could be used for fingerprinting. For
> your draft, it is probably a good idea to limit re-use only to the same
> browser session.
>

I believe this is covered by
https://tools.ietf.org/html/draft-ietf-rtcweb-mdns-ice-candidates-02#section-5.3
.