Re: [rtcweb] Future requirement: RTC-Web apps must work through interface switching

"Olle E. Johansson" <oej@edvina.net> Mon, 03 October 2011 12:30 UTC

Return-Path: <oej@edvina.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 2307521F8B24 for <rtcweb@ietfa.amsl.com>; Mon, 3 Oct 2011 05:30:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.786
X-Spam-Level:
X-Spam-Status: No, score=-1.786 tagged_above=-999 required=5 tests=[AWL=-0.437, BAYES_00=-2.599, HELO_EQ_SE=0.35, J_CHICKENPOX_24=0.6, MIME_8BIT_HEADER=0.3]
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 aLZqpDiLBq+d for <rtcweb@ietfa.amsl.com>; Mon, 3 Oct 2011 05:30:26 -0700 (PDT)
Received: from smtp7.webway.se (smtp7.webway.se [212.3.14.205]) by ietfa.amsl.com (Postfix) with ESMTP id 2BC0121F8B27 for <rtcweb@ietf.org>; Mon, 3 Oct 2011 05:30:26 -0700 (PDT)
Received: from [192.168.40.44] (ns.webway.se [87.96.134.125]) by smtp7.webway.se (Postfix) with ESMTPA id E4ACF754BD0D; Mon, 3 Oct 2011 12:33:22 +0000 (UTC)
Mime-Version: 1.0 (Apple Message framework v1244.3)
Content-Type: text/plain; charset=iso-8859-1
From: "Olle E. Johansson" <oej@edvina.net>
In-Reply-To: <CALiegfnbU4YhuNJ4AatR+0s8JJxp9uQR-x7pk1GmFwDAnnzQkw@mail.gmail.com>
Date: Mon, 3 Oct 2011 14:33:22 +0200
Content-Transfer-Encoding: quoted-printable
Message-Id: <16F2EE6F-78A8-4E77-BDD1-F3FE6CFAF2B5@edvina.net>
References: <E44893DD4E290745BB608EB23FDDB7620D3782@008-AM1MPN1-043.mgdnok.nokia.com> <77D2298D-49EF-4F11-A50C-F1EE17082ECD@edvina.net> <CALiegfnbU4YhuNJ4AatR+0s8JJxp9uQR-x7pk1GmFwDAnnzQkw@mail.gmail.com>
To: =?iso-8859-1?Q?I=F1aki_Baz_Castillo?= <ibc@aliax.net>
X-Mailer: Apple Mail (2.1244.3)
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Future requirement: RTC-Web apps must work through interface switching
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 Oct 2011 12:30:27 -0000

3 okt 2011 kl. 14:29 skrev Iñaki Baz Castillo:

> 2011/10/3 Olle E. Johansson <oej@edvina.net>et>:
>> THe SIP outbound extension has handling of IP address change during a registration/connection. But that doesn't imply IP address change during a call.
> 
> When a SIP client implementing the outbound extension (RFC 5626)
> detects that the TCP (or TLS or WebSocket) connection is
> terminated/down, it should re-register and should send a re-INVITE for
> established dialogs telling the peer about its new location and SDP
> address. In fact, the using RFC 5626 the client does not need to know
> its exact local IP:port, as the edge proxy would route back incoming
> in-dialog request using the new client connection.
Over UDP the client recognizes a new binding using STUN and determines that the connection has failed
and re-initializes.

> 
> 
>> Software like Asterisk has added protection on the RTP ports so after initial packets (handling symmetric RTP) Asterisk will not accept packets from an unknown IP.
> 
> It should allow a change in the source IP:port of the RTP packets in
> case a re-INVITE has been sent by the peer.
Always. Of course. But previously we always accepted it...
> 
> 
>> I would assume that if we had ICE support, ICE could re-initialize the session and the server could open new connections.
> 
> I expect this to be the same: the client would send a re-INVITE after
> detecting local address change and Asterisk should accept it and
> update the session information.
> 
Right.

/O