Re: [MMUSIC] ICE/DTLS optimization (was: Merging ICE aggressive and regular nomination)

Iñaki Baz Castillo <ibc@aliax.net> Mon, 04 August 2014 13:31 UTC

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From: =?UTF-8?Q?I=C3=B1aki_Baz_Castillo?= <ibc@aliax.net>
Date: Mon, 4 Aug 2014 15:31:27 +0200
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To: Simon Perreault <sperreault@jive.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] ICE/DTLS optimization (was: Merging ICE aggressive and regular nomination)
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2014-08-04 15:22 GMT+02:00 Simon Perreault <sperreault@jive.com>om>:
> Le 2014-08-04 09:11, Iñaki Baz Castillo a écrit :
>
>>> Another idea: put the DTLS and STUN next to each other. Since the STUN
>>> header contains the STUN message length, you can put data after it in the
>>> same UDP packet.
>>>
>>> Not saying it's a better idea, just something we could consider doing.
>>
>>
>> Please don't forget STUN and DTLS over TCP, which is carried as per
>> http://tools.ietf.org/html/rfc4571.
>
>
> Assuming you meant RTP over TCP...
>
> As this optimization would be for DTLS, I was assuming UDP only...

No, I mean STUN, DTLS and RTP over TCP.

http://tools.ietf.org/html/rfc6544

Section 3:

                     +----------+
                     |          |
                     |    App   |
          +----------+----------+     +----------+----------+
          |          |          |     |          |          |
          |   STUN   |  (D)TLS  |     |   STUN   |    App   |
          +----------+----------+     +----------+----------+
          |                     |     |                     |
          |      RFC 4571       |     |      RFC 4571       |
          +---------------------+     +---------------------+
          |                     |     |                     |
          |         TCP         |     |         TCP         |
          +---------------------+     +---------------------+
          |                     |     |                     |
          |         IP          |     |         IP          |
          +---------------------+     +---------------------+

           Figure 1: ICE TCP Stack with and without (D)TLS



-- 
Iñaki Baz Castillo
<ibc@aliax.net>