Re: [rtcweb] Translating Plan A into No Plan (Was: No Plan)

Martin Thomson <martin.thomson@gmail.com> Mon, 03 June 2013 20:56 UTC

Return-Path: <martin.thomson@gmail.com>
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 554C421F965A for <rtcweb@ietfa.amsl.com>; Mon, 3 Jun 2013 13:56:25 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, NO_RELAYS=-0.001]
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 M3khIyvQm7U1 for <rtcweb@ietfa.amsl.com>; Mon, 3 Jun 2013 13:56:15 -0700 (PDT)
Received: from mail-wg0-x22a.google.com (mail-wg0-x22a.google.com [IPv6:2a00:1450:400c:c00::22a]) by ietfa.amsl.com (Postfix) with ESMTP id 23B0A11E8116 for <rtcweb@ietf.org>; Mon, 3 Jun 2013 13:49:38 -0700 (PDT)
Received: by mail-wg0-f42.google.com with SMTP id n12so3126443wgh.3 for <rtcweb@ietf.org>; Mon, 03 Jun 2013 13:49:38 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=adRfkSGeM950JqDsejZVo2+cIQrKhV2Sgh8Qzpj5rd0=; b=zfV2CsYv96LTwosSGhBL28+ODihM9SX69jJgnNDDWvisyy7i1BvgDroaYue595hPzb FfrkQY8pxS5lbHpZnyQum0h09OdWB2lUGz9HXqrthEfESJL9w7omwm1+1UM9HWNI/TCH e7uV8SH7Im83h8+5sNh+/lUSUYUSC+DiH2TycG1GnEKfj/d0istnZViOd1Vnt7IyFqi9 W/ocudXpcL3pRXVREJTqaTUnpPUgZ64BYGdJUrDpruGEWnPj7645edt1eI7RBjplHYW0 srsb0KbQiHVPO28O9YmEpO4zR0rCL7HpYKxfmhPYQJrjE7YM2HEQrW6eqYkhDu8HXLhu c49g==
MIME-Version: 1.0
X-Received: by 10.194.249.231 with SMTP id yx7mr10251203wjc.13.1370292578323; Mon, 03 Jun 2013 13:49:38 -0700 (PDT)
Received: by 10.194.250.10 with HTTP; Mon, 3 Jun 2013 13:49:38 -0700 (PDT)
In-Reply-To: <CABcZeBNp72QirKG1WPaX0HFjCFC+WRJ4Zh-H9L8zaVmmb4Yuog@mail.gmail.com>
References: <51A65017.4090502@jitsi.org> <51A65DB8.9060702@alum.mit.edu> <51A880A7.7010908@jitsi.org> <C5E08FE080ACFD4DAE31E4BDBF944EB113528171@xmb-aln-x02.cisco.com> <51A8EAB7.8080206@jitsi.org> <C5E08FE080ACFD4DAE31E4BDBF944EB11352940B@xmb-aln-x02.cisco.com> <51ACD224.8080100@jitsi.org> <CABcZeBNp72QirKG1WPaX0HFjCFC+WRJ4Zh-H9L8zaVmmb4Yuog@mail.gmail.com>
Date: Mon, 3 Jun 2013 13:49:38 -0700
Message-ID: <CABkgnnVe1GBmDk0Ys6zuL1=9feC+YukT1u7zLK4hgFLpPJVO6g@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Eric Rescorla <ekr@rtfm.com>
Content-Type: text/plain; charset=UTF-8
Cc: "Cullen Jennings \(fluffy\)" <fluffy@cisco.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Translating Plan A into No Plan (Was: No Plan)
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: Mon, 03 Jun 2013 20:56:25 -0000

On 3 June 2013 11:33, Eric Rescorla <ekr@rtfm.com> wrote:
>
> I'm really not following how this works in "No Plan". Ignoring Plan A and
> Plan B, can you just
> walk through a complete example of what happens in your plan? I.e., how does
> browser
> B learn learn that Browser A wants to send 3 streams instead of one?

I think that I've reached the same conclusion.  At some point, the
browser needs to be told what to do.  At browser A, this is fairly
obvious: streams are added to the RTCPeerConnection instance.  But
what happens at browser B?

I think that there are a couple of alternatives, and we might need to
enable more than one of those, but I don't think that Section 7 has
enough information yet.