Re: [rtcweb] Support for websockets

Matthew Kaufman <matthew.kaufman@skype.net> Wed, 07 September 2011 22:09 UTC

Return-Path: <matthew.kaufman@skype.net>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 96FCE21F8D6C for <rtcweb@ietfa.amsl.com>; Wed, 7 Sep 2011 15:09:54 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -5.491
X-Spam-Level:
X-Spam-Status: No, score=-5.491 tagged_above=-999 required=5 tests=[AWL=1.108, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6Mql2hODnBSk for <rtcweb@ietfa.amsl.com>; Wed, 7 Sep 2011 15:09:53 -0700 (PDT)
Received: from mx.skype.net (mx.skype.net [78.141.177.88]) by ietfa.amsl.com (Postfix) with ESMTP id AFCF821F8D21 for <rtcweb@ietf.org>; Wed, 7 Sep 2011 15:09:52 -0700 (PDT)
Received: from mx.skype.net (localhost [127.0.0.1]) by mx.skype.net (Postfix) with ESMTP id 3A2BE7FD; Thu, 8 Sep 2011 00:11:35 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=skype.net; h=message-id :date:from:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; s=mx; bh=BQMIYpQX1mjDi2 ZUp5diHZ42c1c=; b=gu9E8wAv7PLhQrDtSYQPiXpe6bv0rsDOuQYWVJIVU5wL6t NxM7UvVLvOMgB5gfpx+fwXRP/Xk4/U68EtjrB7bbhaZx2KSBjaYzi8dn7nGmKNqA 9FkOMcBx9kPy2P/20XO1bP6edEZu956xVcrw7tFrHME+MkMZDv6K1FZE+L5A0=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=skype.net; h=message-id:date:from :mime-version:to:cc:subject:references:in-reply-to:content-type: content-transfer-encoding; q=dns; s=mx; b=RqY0ClanewlVnar3E/Lz0L i62vA5/EIMPc/eRXJxxP8mnJErg2zHIPotgEkgcU0mzLsA8sR796l5Rn2J8V/0qj H+Y1aYsiFb7DpqYCMljm8tZQDlvBWEjOKkPSg10rIT/wXfeVTt28/ZQTsuCzZjxk 3Ycr8GvIKPAksjbhLQOV4=
Received: from zimbra.skype.net (zimbra.skype.net [78.141.177.82]) by mx.skype.net (Postfix) with ESMTP id 38AB57F6; Thu, 8 Sep 2011 00:11:35 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1]) by zimbra.skype.net (Postfix) with ESMTP id 1AC2135080AD; Thu, 8 Sep 2011 00:11:35 +0200 (CEST)
X-Virus-Scanned: amavisd-new at lu2-zimbra.skype.net
Received: from zimbra.skype.net ([127.0.0.1]) by localhost (zimbra.skype.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hjI6IrtYTPw8; Thu, 8 Sep 2011 00:11:34 +0200 (CEST)
Received: from Matthew-Kaufman-Air.local (50-0-2-20.static.sonic.net [50.0.2.20]) by zimbra.skype.net (Postfix) with ESMTPSA id 0233A350787D; Thu, 8 Sep 2011 00:11:33 +0200 (CEST)
Message-ID: <4E67EC14.8050808@skype.net>
Date: Wed, 07 Sep 2011 15:11:32 -0700
From: Matthew Kaufman <matthew.kaufman@skype.net>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:6.0.2) Gecko/20110902 Thunderbird/6.0.2
MIME-Version: 1.0
To: Harald Alvestrand <harald@alvestrand.no>
References: <4E259484.20509@ericsson.com>, <37897D97-85A9-4B21-85C3-A7E9BE1EF3E7@cisco.com>, <4E26B742.6050606@jitsi.org>, <62C71813-83B4-44D3-8E54-28262311CDB3@cisco.com> <BLU152-W38359A17A67825B59CD5D0934C0@phx.gbl> <4E27BE02.7090606@ericsson.com> <9F9278CB1892FB48BF35CB5CC3992478A5395C720E@HKGMBOXPRD01.polycom.com> <4E2EB82C.30709@alvestrand.no> <4E643E39.8020205@skype.net> <4E665588.5000700@mozilla.com> <F2636DC8-94B1-4C17-8A82-B4ED745C913E@cisco.com> <4E678D22.4060203@alvestrand.no>
In-Reply-To: <4E678D22.4060203@alvestrand.no>
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Support for websockets
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/rtcweb>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 07 Sep 2011 22:09:55 -0000

On 9/7/11 8:26 AM, Harald Alvestrand wrote:
> On 09/07/11 17:04, Cullen Jennings wrote:
>> Sooner or later, I do think we should talk about how to spoof RTP 
>> through firewalls that only allow HTTP traffic. Certainly websockets 
>> would be worth looking at but I suspect we will find that it was not 
>> designed for transfer of large high bandwidth material (like video) 
>> and that something similar but different is needed.
> The huge difference between websockets and a real-time RTP connection 
> is that in a real-time connection, you drop packets if you get behind. 
> In websockets, you deliver everything that made it to the "send" call.

This is also true of TURN-over-TLS-over-TCP, as is in the current spec 
for the TCP fallback.

However TURN-over-TLS-over-TCP doesn't look like HTTP to firewalls that 
only allow HTTP traffic.

Matthew Kaufman