Re: [rtcweb] Is rtcweb the right place for draft-ietf-rtcweb-mdns-ice-candidates?
Justin Uberti <juberti@google.com> Thu, 04 July 2019 05:41 UTC
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From: Justin Uberti <juberti@google.com>
Date: Wed, 03 Jul 2019 22:41:20 -0700
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To: Nils Ohlmeier <nohlmeier@mozilla.com>
Cc: Roman Shpount <roman@telurix.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>
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Subject: Re: [rtcweb] Is rtcweb the right place for draft-ietf-rtcweb-mdns-ice-candidates?
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As I understand it, mdns in the c= line will only occur in edge cases, i.e., when there are no other candidates. As such I don’t see this as a showstopper. We have measured the connectivity impact of this change in significant detail and feel increasingly confident there are no egregious latent issues. On Wed, Jul 3, 2019 at 9:50 PM Nils Ohlmeier <nohlmeier@mozilla.com> wrote: > Probably not the ideal forum to point this out, but I hope the Chrome team > is aware that rolling out this feature, assuming it includes using mDNS in > the connection line, will break interop with Firefox. > So I have to concur that rolling this out appears to be premature to me. > > Best > Nils Ohlmeier > > On 3Jul, 2019, at 17:58, Justin Uberti < > juberti=40google.com@dmarc.ietf.org> wrote: > > Hmm, that's unfortunate. I think this is a mistake, given that we are > about to throw the switch to enable mDNS for 100% of Chrome endpoints; > Chrome (and soon all browsers) will have to ignore ice-sip-sdp until this > extension spec is written. > > ice-sip-sdp isn't published yet, so it seems an update to that document > could still be a possibility. If that's not an option, putting forth #1 as > a specific extension that allows FQDN candidates to be generated in certain > situations seems like the right path. > > > > On Wed, Jul 3, 2019 at 5:40 PM Roman Shpount <roman@telurix.com> wrote: > >> Part of the problem is that mmusic have decided to punt on the FQDN >> support. In the current mmusic-ice-sip-sdp the final language that was >> included: >> >> <connection-address>: is taken from RFC 4566 [RFC4566]. It is the IP >> address of the candidate, allowing for IPv4 addresses, IPv6 addresses, and >> fully qualified domain names (FQDNs). When parsing this field, an agent >> can differentiate an IPv4 address and an IPv6 address by presence of a >> colon in its value - the presence of a colon indicates IPv6. *An agent >> generating local candidates MUST NOT use FQDN addresses. An agent >> processing remote candidates MUST ignore candidate lines that include >> candidates with FQDN *or IP address versions that are not supported or >> recognized. *The procedures for generation and handling of FQDN >> candidates, as well as, how agents indicate support for such procedures, >> need to be specified in an extension specification.* >> >> So, at this point we have two options: >> 1. draft-ietf-rtcweb-mdns-ice-candidates can update ice-sip-sdp and >> define how FQDN candidates generated by mdns are handled >> 2. write a new draft in mmusic which defines FQDN handling >> >> In any case some sort of mmusic discussion is needed to reconcile this. >> >> Best Regards, >> _____________ >> Roman Shpount >> >> >> On Wed, Jul 3, 2019 at 8:28 PM Justin Uberti <juberti@google.com> wrote: >> >>> The problem this draft is trying to solve is fairly RTCWEB-specific. If >>> there are individual issues to resolve, we can send them out to mmusic for >>> discussion, but AFAIK no changes to existing ICE specs are needed. >>> >>> On Wed, Jul 3, 2019 at 4:26 PM Roman Shpount <roman@telurix.com> wrote: >>> >>>> Hi All, >>>> >>>> Is rtcweb the right place for draft-ietf-rtcweb-mdns-ice-candidates? >>>> This entire draft seems to be ICE/SDP specific and not limited to rtcweb. >>>> Also, there are significant interop implications for this draft >>>> between browser and non-browser end points which probably warrant larger >>>> discussion outside of rtcweb group. I would think mmusic would be a much >>>> better place for this draft. I know there is an incentive to complete this >>>> draft quickly but this has a potential to break a lot of things (it already >>>> did break interop with almost every existing ICE implementation). >>>> >>>> Regards, >>>> _____________ >>>> Roman Shpount >>>> _______________________________________________ >>>> rtcweb mailing list >>>> rtcweb@ietf.org >>>> https://www.ietf.org/mailman/listinfo/rtcweb >>>> >>> _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb > > >
- [rtcweb] Request for status update Harald Alvestrand
- Re: [rtcweb] Request for status update Sean Turner
- [rtcweb] Is rtcweb the right place for draft-ietf… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Bernard Aboba
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Nils Ohlmeier
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Bernard Aboba
- Re: [rtcweb] Request for status update Harald Alvestrand
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Harald Alvestrand
- Re: [rtcweb] Is rtcweb the right place for draft-… Philipp Hancke
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Harald Alvestrand
- Re: [rtcweb] Request for status update Adam Roach
- Re: [rtcweb] Request for status update Colin Perkins
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Justin Uberti
- Re: [rtcweb] Is rtcweb the right place for draft-… Adam Roach
- Re: [rtcweb] Is rtcweb the right place for draft-… Roman Shpount
- Re: [rtcweb] Is rtcweb the right place for draft-… Christer Holmberg