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[rtcweb] Dummy ports

Eric Rescorla <ekr@rtfm.com> Wed, 02 July 2014 23:23 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 02 Jul 2014 16:22:36 -0700
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To: mmusic WG <mmusic@ietf.org>, "rtcweb@ietf.org" <rtcweb@ietf.org>
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Subject: [rtcweb] Dummy ports
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Folks,

https://github.com/rtcweb-wg/jsep/issues/41


We ran into a place where bundle and trickle conflict.

Trickle requires that you use port 9 for the c-line if you are doing full
trickle:
http://tools.ietf.org/html/draft-ietf-mmusic-trickle-ice-01#section-5.1


However, JSEP explicitly requires that we use distinct ports for
each m= line:
http://tools.ietf.org/html/draft-ietf-rtcweb-jsep-06#section-5.2.1

Obviously 9 is equal to itself, so this isn't going to work.


The JSEP editors got together and came to the conclusion that
we probably needed to use sequential numbers < 1024. Does
anyone object to this? If not, perhaps Emil can edit this into Trickle.


Also, JSEP uses the term "null" for these ports. We propose that
instead we use the term "dummy".

-Ekr

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