Re: [rtcweb] Call for review

Roman Shpount <roman@telurix.com> Tue, 05 March 2019 21:32 UTC

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From: Roman Shpount <roman@telurix.com>
Date: Tue, 5 Mar 2019 16:31:55 -0500
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To: Justin Uberti <juberti@google.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 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.

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.

Regards,
_____________
Roman Shpount