IETF Logo Mail Archive

Re: [rtcweb] [MMUSIC] Dummy ports

Martin Thomson <martin.thomson@gmail.com> Wed, 02 July 2014 23:36 UTC

Return-Path: <martin.thomson@gmail.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A1E401A03FD; Wed, 2 Jul 2014 16:36:53 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rR1NaB1ko3xO; Wed, 2 Jul 2014 16:36:52 -0700 (PDT)
Received: from mail-wg0-x230.google.com (mail-wg0-x230.google.com [IPv6:2a00:1450:400c:c00::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 26F801A0387; Wed, 2 Jul 2014 16:36:52 -0700 (PDT)
Received: by mail-wg0-f48.google.com with SMTP id n12so11641416wgh.19 for <multiple recipients>; Wed, 02 Jul 2014 16:36:50 -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=b4+tOolvxcpd0ktMD30/K729vkqmjdPEA4F1+Fpsg6w=; b=JDlohnSSetoe3JOG7z1ompZcU6sDYzjEQbul+o0XDn6g+fiZHSCjwmqqwMPXachmMB /p961G+3BEqtWJR6CUssszYr/+4AkgNTAA7hEX6U+lX+iq2IXJOc9rT0/CCGMFtzEoT+ Ih0LWXLryh90ysGWugjNemMhcH5pGl2PKqc73RIOD7neRVsZRU59CDlSUcMLItofP+JS JqCniqhnbn6OszEqaO6RsN9g63/Tvl/aP78ZCP3xNv/rDXF/IX41BlCE7IcEmDm6llNe y1apwEYe/kGK6Ax2GOxEoo230LtSIKQ2lmWDC4h8RCMsS0hfkwWlpbsgNido5JdjKbpg rHbQ==
MIME-Version: 1.0
X-Received: by 10.180.101.39 with SMTP id fd7mr7072565wib.65.1404344210753; Wed, 02 Jul 2014 16:36:50 -0700 (PDT)
Received: by 10.194.110.6 with HTTP; Wed, 2 Jul 2014 16:36:50 -0700 (PDT)
In-Reply-To: <CABcZeBMC=SAVX1Ji71yg9bmbmoDFAeKkZER9gOVsFa51Jvk_HA@mail.gmail.com>
References: <CABcZeBMC=SAVX1Ji71yg9bmbmoDFAeKkZER9gOVsFa51Jvk_HA@mail.gmail.com>
Date: Wed, 02 Jul 2014 16:36:50 -0700
Message-ID: <CABkgnnWTikckH=5=NfwJYdcfHjcOi5ggzhLR+=CVaXeACLcdKw@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Eric Rescorla <ekr@rtfm.com>
Content-Type: text/plain; charset="UTF-8"
Archived-At: http://mailarchive.ietf.org/arch/msg/rtcweb/IKu4mcxIZEtG-p3cuBGFEfOEfww
Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>, mmusic WG <mmusic@ietf.org>
Subject: Re: [rtcweb] [MMUSIC] Dummy ports
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.15
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, 02 Jul 2014 23:36:53 -0000

On 2 July 2014 16:22, Eric Rescorla <ekr@rtfm.com> wrote:
>
> 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.

I'm not sure that this is actually a problem, unless I've missed something.

The reason for having different ports is to make it clear that the m=
section will have distinct transport endpoints and can be unbungled if
the answerer wants that.  But the presence (or absence) of
a=bungle-only is sufficient to distinguish those m= sections.

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

WFM.

v2.23.0 | Report a Bug | By Email