Re: [MMUSIC] Empty candidate lists in ice-sip-sdp offers and answers
Suhas Nandakumar <suhasietf@gmail.com> Thu, 16 May 2019 20:58 UTC
Return-Path: <suhasietf@gmail.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6183B120332 for <mmusic@ietfa.amsl.com>; Thu, 16 May 2019 13:58:17 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 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, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.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 xQ2Q-AIA0giy for <mmusic@ietfa.amsl.com>; Thu, 16 May 2019 13:58:14 -0700 (PDT)
Received: from mail-vs1-xe33.google.com (mail-vs1-xe33.google.com [IPv6:2607:f8b0:4864:20::e33]) (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 D8E34120347 for <mmusic@ietf.org>; Thu, 16 May 2019 13:58:12 -0700 (PDT)
Received: by mail-vs1-xe33.google.com with SMTP id e2so3205319vsc.13 for <mmusic@ietf.org>; Thu, 16 May 2019 13:58:12 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=tG33QlKxUzRuyhK5ey8nN0vPj/KT7ewHSbWlAflKiC4=; b=fsCTeLWaQKbBY1OEY07Ii3GLqwVW9Z2O/7skM1vCM4oyHAnLnPSy0VrKVTIJBumAgS DmN1JVyYfrybXhglT25y6PtI27TmxJfIEMLBDaZgygQv86eX08rPucHRpgknB1ngHKEW iEmrbhd08buquJ48bjpwpdvscHKTO1vjOjfLOLsl3OUXF+LWryGbBZF4tSUTdorX+DvE lSJjEKPglCI7Q0tpY3x5xMYcNT0ow5kJPJsx5FgZRDsLy7OGLBsaE5s719IldY0riSpq JsxeTyxfrKAEig5kvFDoDolTzs7tldDkTOTO4VoP5rh1PWiaB118IDb+WARPTFA71tuw 9DEA==
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=tG33QlKxUzRuyhK5ey8nN0vPj/KT7ewHSbWlAflKiC4=; b=V/ym0bOjCDmfqMGDlUc1cZBdan8q6anasxuukA77V6Ofbscj7DnnkOcOuKtja0cpFo VS+/eZzviiLb9AqwSxr6b9boct/oRf71BMwEnDm6uxKP/YG4ECgGoE5zwFw80BWnjpn0 UCYNYvNoDzxB70s7D4107n6YD8zd+Tc1UY+FGMqbTwWxFBP6Bt5OKebFf4ExuD7JDOMy 58eGMBQL7yBHDsZyj9WXS5XUaGtn+M5E1C86tu+qsJf1EWNkcQ7UTot0xn5KtcRovsE7 aVI2fxYeuRWxXNjH//17jchBXRle7sBjKauK6yRHLPP/tSrdt0GHWa8j5tQ7Ar1gm/sV SgyQ==
X-Gm-Message-State: APjAAAVqPmG2xYNp8IepcxDKYdOKBY4Oj6FCZCq4uIbyFlPDLPoe/AjB l7yeCACLdZl2BjzzyVkireVnF+SEDIpS6Sil+QE=
X-Google-Smtp-Source: APXvYqzEb2kcAxl8DC+gDbRCP0sfcHg+y7kKqewjuV5j3N3mfLyIrFJUPPtq8cIe9z3B5eGPfW8txK7o32QLPL8Eyvo=
X-Received: by 2002:a67:c503:: with SMTP id e3mr16454324vsk.230.1558040291944; Thu, 16 May 2019 13:58:11 -0700 (PDT)
MIME-Version: 1.0
References: <CAD5OKxu=tqdoqBBL=qyT0KywAnzzxSEOc_f47TCBt9Qg63FB4A@mail.gmail.com> <HE1PR07MB3161C69040BF2BB9E518C2AF933F0@HE1PR07MB3161.eurprd07.prod.outlook.com> <CAD5OKxvMhFVju-UKttNb+3Bb2rxCJW=eVpaxaBRT_LC6khMabw@mail.gmail.com> <7cbe5d19-4a99-ae30-2c7a-ae75ef12aa75@cisco.com>
In-Reply-To: <7cbe5d19-4a99-ae30-2c7a-ae75ef12aa75@cisco.com>
From: Suhas Nandakumar <suhasietf@gmail.com>
Date: Thu, 16 May 2019 13:58:01 -0700
Message-ID: <CAMRcRGThh5jJUEZqYbpzWG_tkM_BuW2bYQMY+2OTETcnTA3AJQ@mail.gmail.com>
To: Flemming Andreasen <fandreas@cisco.com>
Cc: Roman Shpount <rshpount@turbobridge.com>, Christer Holmberg <christer.holmberg@ericsson.com>, mmusic WG <mmusic@ietf.org>
Content-Type: multipart/alternative; boundary="00000000000025b543058907864c"
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/P4GKKLYmDd07A-jIL-j_0XAxyUg>
Subject: Re: [MMUSIC] Empty candidate lists in ice-sip-sdp offers and answers
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/mmusic/>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 16 May 2019 20:58:25 -0000
On Sun, May 12, 2019 at 8:40 PM Flemming Andreasen <fandreas@cisco.com> wrote: > > > On 4/29/19 5:27 PM, Roman Shpount wrote: > > On Sat, Apr 27, 2019 at 2:02 PM Christer Holmberg < > christer.holmberg@ericsson.com> wrote: > >> ... >> >> >NOTE: Since it is possible that no candidates were provided in the >> offer, or that all candidates in the offer >> >where skipped due to unsupported address type or FQDN name resolution >> failure, ICE nomination process >> >can start with no remote candidates. This, however, does not indicate >> an immediate ICE nomination failure. >> >See <<draft-holmberg-ice-pac>> for more details. >> > >> >In the Receiving the Initial Answer section I have added the following: >> > >> >NOTE: Since it is possible that no candidates were provided in the >> answer, or that all candidates in the answer >> >where skipped due to unsupported address type or FQDN name resolution >> failure, ICE nomination process can >> >start with no remote candidates. This, however, does not indicate an >> immediate ICE nomination failure. >> >See <<draft-holmberg-ice-pac>> for more details. >> >> I think the text is confusing, because it starts talking about the ICE >> nomination process. There are other things that happen before, including >> the creation of candidate pairs. >> >> So, I think the text should say that the agent will not be able to create >> candidate pairs, and it will not be able to start sending connectivity >> checks. Instead it will wait for the peer agent to start sending >> connectivity checks, that the agent will then process as peer reflexive >> candidates. >> > > I will try to come up with some text that uses the same terminology as RFC > 8445. > > Do you have the suggested text ? > [Suhas] Roman, do you happen to have the suggested text ? > > >I wanted to get the group's opinion regarding: >> > >> >1. Allowing offers and answers with no candidates >> >> I am ok with the principle. There seem to be use-cases for it, so... >> >> Agreed. > > >2. Adding a reference to draft-holmberg-ice-pac regarding how such >> session descriptions or session descriptions where all candidates were >> rejected are handled. >> >> The reference in the text above is misleading, because to me it sounds >> like PAC describes how to process offers/answers without candidates. PAC is >> only about a timer. >> >> > Maybe this draft should cover the situation when session description > processing did not generate any candidates. The fact that ICE has some > minimal run timer is not enough. We still need something that explicitly > states that it is acceptable to run ICE nomination process without > candidates since, as far as I know, nothing in RFC 8445 specifies if this > is allowed or not. > > I am not in favor of adding a normative dependency to ice-pac at this late > stage. Why do we need that ? > > Thanks > > -- Flemming (with chair hat on) > > > Regards, > ___________________________________________ > Roman Shpount | CTO | Cell: +1(202) 262-8672 > 4905 Del Ray Ave, Suite 300 | Bethesda, MD 20814 > TurboBridge > > > > > _______________________________________________ > mmusic mailing listmmusic@ietf.orghttps://www.ietf.org/mailman/listinfo/mmusic > > > _______________________________________________ > mmusic mailing list > mmusic@ietf.org > https://www.ietf.org/mailman/listinfo/mmusic >
- [MMUSIC] Empty candidate lists in ice-sip-sdp off… Roman Shpount
- Re: [MMUSIC] Empty candidate lists in ice-sip-sdp… Christer Holmberg
- Re: [MMUSIC] Empty candidate lists in ice-sip-sdp… Roman Shpount
- Re: [MMUSIC] Empty candidate lists in ice-sip-sdp… Flemming Andreasen
- Re: [MMUSIC] Empty candidate lists in ice-sip-sdp… Suhas Nandakumar