Re: [rtcweb] Is rtcweb the right place for draft-ietf-rtcweb-mdns-ice-candidates?
Justin Uberti <juberti@google.com> Thu, 04 July 2019 15:12 UTC
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From: Justin Uberti <juberti@google.com>
Date: Thu, 04 Jul 2019 08:12:25 -0700
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To: Bernard Aboba <bernard.aboba@gmail.com>
Cc: Nils Ohlmeier <nohlmeier@mozilla.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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https://tools.ietf.org/html/rfc4566#section-9 ; sub-rules of 'c=' connection-address = multicast-address / unicast-address ... unicast-address = IP4-address / IP6-address / FQDN / extn-addr On Wed, Jul 3, 2019 at 11:08 PM Bernard Aboba <bernard.aboba@gmail.com> wrote: > Nils said: > > "assuming it includes using mDNS in the connection line, will break > interop" > > [BA] Can someone provide a legacy citation relating to FQDNs in the > connection line? I am struggling to find one. > > draft-ietf-mmusic-rfc4566bis > <https://tools.ietf.org/html/draft-ietf-mmusic-rfc4566bis> Section 5.7 > only talks about IPv4 and IPv6 addresses. I do not see mention of FQDNs. > > draft-ietf-mmusic-ice-sip-sdp does not mention FQDNs in the "c=" line and > all examples show IPv4 or IPv6 addresses. > > RFC 3264 does not mention FQDNs in c= lines in the text, although it uses > FQDNs within examples (such as Sections 10.1 and 10.2). > > JSEP does not mention FQDNs in "c=" lines as far as I can tell. > > Also in these documents, I do not see instructions on how a legacy > implementation should gracefully react to FQDNs in the connection line > (e.g. ignoring it). > > 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 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