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Re: [MMUSIC] Dummy ports

Emil Ivov <emcho@jitsi.org> Wed, 23 July 2014 22:42 UTC

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Date: Wed, 23 Jul 2014 18:42:44 -0400
From: Emil Ivov <emcho@jitsi.org>
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To: Justin Uberti <juberti@google.com>, Martin Thomson <martin.thomson@gmail.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>
Subject: Re: [MMUSIC] Dummy ports
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On 23.07.14, 15:49, Justin Uberti wrote:
> The JSEP authors discussed a bit more and agreed that using port 9s on
> all m= lines when doing full trickle is the right solution to this problem.

Great news! Then we are pretty much ready for WGLC.

Emil

>
> On Fri, Jul 11, 2014 at 2:34 PM, Martin Thomson
> <martin.thomson@gmail.com <mailto:martin.thomson@gmail.com>> wrote:
>
>     On 11 July 2014 11:17, Emil Ivov <emcho@jitsi.org
>     <mailto:emcho@jitsi.org>> wrote:
>      >
>      >
>      > On 11.07.14, 19:51, Martin Thomson wrote:
>      >>
>      >> On 11 July 2014 09:33, Justin Uberti <juberti@google.com
>     <mailto:juberti@google.com>> wrote:
>      >>>
>      >>> a) We require unique 'dummy' ports in the initial trickle offer.
>      >>> b) We allow use of the same dummy port (9) in the initial
>     trickle offer.
>      >>> (This is what Chrome does, although it currently uses port 1).
>      >>>
>      >>> We had been leaning towards (a) based on the legacy equipment case
>      >>> mentioned
>      >>> above. However, if nobody can provide details on this case, I
>     agree we
>      >>> should end up with (b).
>      >>
>      >>
>      >> As a general rule, if accommodating legacy equipment is particularly
>      >> hard for us here, then we should leave the fixups needed for that
>      >> legacy equipment to application code.  This seems like a good
>      >> candidate for that.  It's not like non-9 ports will work with all
>      >> legacy equipment anyway.
>      >
>      > Also note that, in the case of trickle, port 9s would only occur
>     if the
>      > offerer expects (knows) it would be supported. In other cases it
>     would just
>      > do half trickle and the problem wouldn't exist.
>
>     Yeah, that's even more reason to do the right thing (as opposed to the
>     safe thing).
>
>

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