Re: [rtcweb] WG adoption call: draft-mdns-ice-candidates

[Christer Holmberg <[e-mail]>]

Hi,

> Regarding DNS resolution and associated complexity, I think we can sidestep most of that here in rtcweb given
> that we will be mandating 1:1 mapping between foo.local names and IP addresses.

If that’s the case, it should be explicitly indicated.

Others (Cullen etc) also raised issues in MMUSIC, but I'll let them speak for themselves whether they think it affects the RTCWEB usage.

Regards,

Christer


On Sat, Jul 28, 2018 at 3:10 AM Christer Holmberg <[e-mail]> wrote:
Hi,

In Montreal this was discussed in MMUSIC, and the outcome was that this will require more work, in MMUSIC or ICE.

I have also given some input why I think ICE support of FQDNs in general (not specific to mDNS) requires more work.

For example, as an FQDN can be associated with multiple IP addresses, does that mean that the endpoint providing the FQDN will create separate "sub candidates" for each IP address that the FQND can resolve to (as a candidate per definition is associated with ONE transport (IP address + port + protocol))?. If so, each of those local candidates may end up in different foundations, some may be pruned (or removed because of other reasons). In addition, is the endpoint supposed to send checks on each of these candidates? For how long will it maintain them? Etc etc etc.

The concept of "multi-address candidates" is a new thing, currently not covered by the ICE specifications.

Now, IF we assume a "FQDN candidate" will only resolve to one IP address, the issue is easier to solve, but based on comments from others we cannot make that assumption.

So, while I do not object to working on support of mDNS in ICE, my suggestion would be that the ADs, and the RTCWEB/MMUSIC/ICE chairs, discuss on how to move forward, before we adopt this draft.

Regards,

Christer


-----Original Message-----
From: rtcweb [mailto:[e-mail]] On Behalf Of Sean Turner
Sent: 28 July 2018 03:43
To: RTCWeb IETF <[e-mail]>
Subject: [rtcweb] WG adoption call: draft-mdns-ice-candidates

The consensus in the RFCWEB@IETF102 room was that the WG should adopt  https://datatracker.ietf.org/doc/draft-mdns-ice-candidates/ as a WG item. But, we need to confirm this on list.  If you would like for this draft to become a WG document and you are willing to review it as it moves through the process, then please let the list know by 2359UTC 20180810.  If you are opposed to this being a WG document, please say so (and say why).

Note that the draft has been marked as a “Call for Adoption by WG Issued” in the datatracker.

Thanks - spt
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