Re: [dispatch] draft-winterbottom-dispatch-locparam

Paul Kyzivat <> Thu, 16 July 2015 14:51 UTC

Return-Path: <>
Received: from localhost ( []) by (Postfix) with ESMTP id C1FDF1A00DC for <>; Thu, 16 Jul 2015 07:51:38 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -0.035
X-Spam-Status: No, score=-0.035 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, J_CHICKENPOX_37=0.6, J_CHICKENPOX_39=0.6, SPF_SOFTFAIL=0.665] autolearn=no
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id IMD8ghHcYazG for <>; Thu, 16 Jul 2015 07:51:37 -0700 (PDT)
Received: from ( [IPv6:2001:558:fe21:29:69:252:207:39]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id E99B91A0364 for <>; Thu, 16 Jul 2015 07:51:21 -0700 (PDT)
Received: from ([]) by with comcast id t2pd1q0092JGN3p012rMqo; Thu, 16 Jul 2015 14:51:21 +0000
Received: from Paul-Kyzivats-MacBook-Pro.local ([]) by with comcast id t2rL1q00j3Ge9ey012rMD4; Thu, 16 Jul 2015 14:51:21 +0000
Message-ID: <>
Date: Thu, 16 Jul 2015 10:51:19 -0400
From: Paul Kyzivat <>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
References: <>
In-Reply-To: <>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Transfer-Encoding: 8bit
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=q20140121; t=1437058281; bh=QT7X8Dz+hyItDyAA+urBhSXIjthzdD7ClStjkBnzfAc=; h=Received:Received:Message-ID:Date:From:MIME-Version:To:Subject: Content-Type; b=XtB3ax3ZDXiSkQBrzpL8m5AGhIzIgImX0t/Hsn+WMl3O5EzTifkAY/KI3AqfFhbGn qaqO7QnnhAgVgCfEnOfyBQWNTN95cNJzgfW0oIgCGtS4XGkLkul7K3OOhlF1h71TpC u6LtVbFcc5zcWAY/qPgGTlh2paS33zM8Pvt9JJBeHEAwz9kh4cI02NnzL6NxsS7vcn DMOIsc/JYjpD71ovyYt/nrE70Evd/2jgu0i8NOn0FDBxPs5apIeTdKxs0iy+OjrYKM 5RWhjd5092Y3Gp1g/NoPik7CEsovQqH4ZsLwehFEENNbXfnf417TKRO+nWAx+8IdRK p9SNTwulRYTRQ==
Archived-At: <>
Subject: Re: [dispatch] draft-winterbottom-dispatch-locparam
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DISPATCH Working Group Mail List <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Thu, 16 Jul 2015 14:51:38 -0000


I was just looking at this draft. I don't understand what assumptions it 
is making regarding trust model. Is this intended specifically for 3gpp 
and its trust model? Section 4 says:

    If a proxy receives a message
    from an untrusted source with the loc-src parameter set then it MUST
    remove the loc-src parameter before passing the message into a
    trusted network.

Are we assuming a Spec(t) as defined in 3325?

And is that enough? The obvious issue is the potential for somebody to 
lie about the location source.

Also, the location is specified as a 'host'. I assume you mean that as 
defined in 3261, where it is defined as:

   host = hostname / IPv4address / IPv6reference

Is it really meaningful to use an IP?

Is the expectation that the recipient will simply use these with a 
whitelist or blacklist to determine preferences? Or else how will it be 


On 6/23/15 5:11 AM, James Winterbottom wrote:
> Hi All,
> I a notice about this draft a few weeks ago but haven’t seen and follow up discussion.
> This work is required in ETSI and I believe that as I understand from some 3GPP folks they would like something similar to this also.
> I am just not sure where the right final home for it is.
> Cheers
> James
> _______________________________________________
> dispatch mailing list