Re: [rtcweb] Proposal to break the ICE impasse

Roman Shpount <roman@telurix.com> Tue, 29 January 2019 13:36 UTC

Return-Path: <roman@telurix.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 EFBE1124408 for <rtcweb@ietfa.amsl.com>; Tue, 29 Jan 2019 05:36:29 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.031
X-Spam-Level:
X-Spam-Status: No, score=-2.031 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.142, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, T_SPF_PERMERROR=0.01] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=telurix-com.20150623.gappssmtp.com
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 ikdEzXbaxhte for <rtcweb@ietfa.amsl.com>; Tue, 29 Jan 2019 05:36:28 -0800 (PST)
Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 343D71200D7 for <rtcweb@ietf.org>; Tue, 29 Jan 2019 05:36:28 -0800 (PST)
Received: by mail-pg1-x529.google.com with SMTP id n2so8764401pgm.3 for <rtcweb@ietf.org>; Tue, 29 Jan 2019 05:36:28 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telurix-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=9ExgYsMkyfs2qGjR/5rRrWGw4LS6yvNBqXHtio/HgXo=; b=CaodpApa3iWC45XAqfVqjVoNNYn7P1zk+FQLllDmCqHw9r0++i2k5glFUT0m5ALo/A sycia1vcxqnpaAZzVmX9+JSvRbEFIZiu9li5k48/Qn/m7CEvXS8Z7dNBUDWYl2wrpEYY TAt5xZMgah4/myua9AKvKcn4GHW7sSEFitJ77GH9oAtE627XNokLMzvCToQLR4bo1Hro mhyYoqHmMgFzd3eaKsWSM/ytF0KybltZ8Oi+Gf8e7BAKQteGqTcWJr9Ei4g7FzliE37p t6V2gBuunJh/be8xtGID9Gj9GrqrCqRZPV/HSaOA4X6ZnLHFLpSrOb7h6Tj5F6zDKTnU dWcg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=9ExgYsMkyfs2qGjR/5rRrWGw4LS6yvNBqXHtio/HgXo=; b=Ivq5r7mmJjvAeAmkQNAmU6R0UDIbFl8LYhogF2UXNY9RLgeH9fgy2uHlOd4g/PqBzw A33Mpzs6jEC9zgsH20OXsQtcTNr4y0HrIooK87afGRIsx6hYPxyWs8JUXzr9m5uTBgZm EDPW/CKbWSmOixUX8R0AdEIEfDnL/FVvn4eFqFpTl1neGVfApaTFqBm9ploYalgAirjN FHoAhrRHdooGt/nvT9AGBzIKSuvg5ofq0jHJ2vXVZp6Ptx3I8+KVTU/5WAoa6vMLMu5f FQi+RQUP6no211gy0+YC2+us3Cf9So6DGIpPiuELrYv3S3wufx8XVfRF6CUsAaHZiXNd VCfg==
X-Gm-Message-State: AJcUuke8BuwvjWvsI46mhlfY/IjO+qMx400+tebWniYcm5DlE5tHUTa6 r3lb+1YrKuYhSl4Qbvv65sepEG1Qn9A=
X-Google-Smtp-Source: ALg8bN7dUPU5XqkM63VoNECMKcvrhqH7FKEpmcwP9Yz4Ztm3CAAf2DuBWm8BSCzIBnksRDSfK2fEOw==
X-Received: by 2002:a62:c302:: with SMTP id v2mr26452616pfg.155.1548768986969; Tue, 29 Jan 2019 05:36:26 -0800 (PST)
Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com. [209.85.214.181]) by smtp.gmail.com with ESMTPSA id l184sm48350295pfc.112.2019.01.29.05.36.26 for <rtcweb@ietf.org> (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jan 2019 05:36:26 -0800 (PST)
Received: by mail-pl1-f181.google.com with SMTP id b5so9350493plr.4 for <rtcweb@ietf.org>; Tue, 29 Jan 2019 05:36:26 -0800 (PST)
X-Received: by 2002:a17:902:2f03:: with SMTP id s3mr25511025plb.277.1548768985749; Tue, 29 Jan 2019 05:36:25 -0800 (PST)
MIME-Version: 1.0
References: <97ed2641-8a7e-19a9-be38-a3458ca9212e@nostrum.com> <CABcZeBP9t0SgsHAuENo99D6ffKd7Mw0Xs1vzUCOzSS=WJN5z8A@mail.gmail.com> <HE1PR07MB3161B0F1D2B5AC9DA72DDFAD93950@HE1PR07MB3161.eurprd07.prod.outlook.com> <CAOJ7v-3KHi0TUDsQvG6qq-qeNGBsqLxg+NC1c+Nxvgy0ks0d0g@mail.gmail.com> <CABcZeBNL=sWFfh=zwiuib80HPsno=GzF18gU+z3DrCZTK_PquA@mail.gmail.com> <CA+9kkMDh56CeXRGNSk_r-HrLkDNT5DnYc_FguXOdeccfq=LEMA@mail.gmail.com> <CABcZeBPboLf0bLUDTyJArxsPYSnUrULArmsZ9YshQCX+rEvexA@mail.gmail.com> <CA+9kkMCwCBHWEEADxVHT2ZbvWEi=bUBJ22icKHpA2p8Kg1fF9A@mail.gmail.com> <CALiegfnpj+Pu0Hg05iqHXCwhTefxn_Em7gTnzOXK897fzcyuwg@mail.gmail.com> <CAD5OKxvmQHT3TAt_=xCd_JKnPzXfnc=Mej-mr6KMsaKVoBkuSg@mail.gmail.com> <CALiegfm_jtv1bV3Ok6j20hkim8e6QxMYPrbbHejqoHnCHjMXpA@mail.gmail.com>
In-Reply-To: <CALiegfm_jtv1bV3Ok6j20hkim8e6QxMYPrbbHejqoHnCHjMXpA@mail.gmail.com>
From: Roman Shpount <roman@telurix.com>
Date: Tue, 29 Jan 2019 08:36:13 -0500
X-Gmail-Original-Message-ID: <CAD5OKxsMWEE39O6hSc+UFjwTAa=z1A+XD5X2BY=Q7PEUdYE4UA@mail.gmail.com>
Message-ID: <CAD5OKxsMWEE39O6hSc+UFjwTAa=z1A+XD5X2BY=Q7PEUdYE4UA@mail.gmail.com>
To: =?UTF-8?Q?I=C3=B1aki_Baz_Castillo?= <ibc@aliax.net>
Cc: Ted Hardie <ted.ietf@gmail.com>, RTCWeb IETF <rtcweb@ietf.org>
Content-Type: multipart/alternative; boundary="0000000000003c1fa1058098e1ec"
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtcweb/9oAEIwjujtOiQJlCS9X99cHXQhM>
Subject: Re: [rtcweb] Proposal to break the ICE impasse
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.29
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: <https://mailarchive.ietf.org/arch/browse/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: Tue, 29 Jan 2019 13:36:30 -0000

1-4 are for initial connection. 5 is for the new offer. It can be a "fix
up" offer or simply an offer which happened not to change transport
parameters and is simply adding a codec.

I can write this up in more detail if you need.

Roman Shpount

On Tue, Jan 29, 2019, 7:02 AM Iñaki Baz Castillo <ibc@aliax.net wrote:

> Hi, Roman.
>
> In SIP world (and in many others) 5 will happen before 3, so I don't
> understand. Do I miss something?
>
> El mar., 29 ene. 2019 10:10, Roman Shpount <roman@telurix.com> escribió:
>
>> Iñaki,
>>
>> Please consider the following:
>>
>> 1. Browser client is placed behind the firewall which only allows TCP
>> connections
>>
>> 2. No TURN servers are configured
>>
>> 3. Client establishes connection to a server which supports ICE TCP
>>
>> 4. ICE nomination completes
>>
>> 5. Client browser app calls createOffer with no options (ICE restart
>> option is not present)
>>
>> Based on the current set of specifications, in this case ICE nomination
>> is complete and the TCP candidate is nominated. No other candidates should
>> be present in the offer.
>>
>> Roman Shpount
>>
>