[manet] Clarification on DLEP RFC 8175

Eugene Reznik <ujenreznik@gmail.com> Mon, 07 January 2019 17:52 UTC

Return-Path: <ujenreznik@gmail.com>
X-Original-To: manet@ietfa.amsl.com
Delivered-To: manet@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A6032130FD0 for <manet@ietfa.amsl.com>; Mon, 7 Jan 2019 09:52:38 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 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] 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 KUgk8tYlvVpW for <manet@ietfa.amsl.com>; Mon, 7 Jan 2019 09:52:37 -0800 (PST)
Received: from mail-lf1-x12b.google.com (mail-lf1-x12b.google.com [IPv6:2a00:1450:4864:20::12b]) (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 1001B130FCA for <manet@ietf.org>; Mon, 7 Jan 2019 09:52:37 -0800 (PST)
Received: by mail-lf1-x12b.google.com with SMTP id v5so934828lfe.7 for <manet@ietf.org>; Mon, 07 Jan 2019 09:52:36 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=dEQ0vwwHJt3sqdFIRCJqYqno2lWu++EUDne0c8pe/BM=; b=GRjtMSoenCXPmXtEW3X63ZnPSds68fgRD8LifBeNQaQ47c/pv3IHNomR4ki0h+Kgyv /1p1ZzOjRHTiOTTjhjBV5WdMODjq2QAGgfD6zwG0hw1Om1sy9HxpgkOGwHnd1aCnZmIe cxweCHyOAj0DKEOY2BC8NVBpNR/Cd6fhJIOB3RyD0xGr29Ydc0pbovRYXnyEhJ8BrvB4 OZbv32TSqz3hwN1wng9jjfZwzSq99i0PXn3pfO4Xb8QxOjcJLGBSr+0EeDNU2Q/6QLhk AFLA4zaI396QG/GN6p0l9hN+tQiTk9zVFh444iTq7JRYevFOeUYuvvQ16eFDu2iF2BzC YuPA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=dEQ0vwwHJt3sqdFIRCJqYqno2lWu++EUDne0c8pe/BM=; b=oo5TmADgOXgZR/o++wbymksCA6ouIsaaUuyPnwD7Hlicuh6LFn1DMKB8IQZ2HjFB+I xR/oyT/NgD+d4nk0jcExgxn3eP00uRV796FFn7DlfKbwbWcsZRjf2K1oo0aJmQQVdzk4 k8ZShUGYuUobauIZKqRlt1jn7C3vCUqvt+U7+KX4gVNn77JtFSFLlYF1GAeLZLlC0pb5 q1GZZ/Tn04PnGfERMEjSS0le/v5MT98BV9KmHQIMv59tGWndbfmAtZhSydC5hGM8XJ3I +Ye8wvJ9qxAsmsON1jGKzTbsjHEykCYXDhHJzBm989kf8SG+BNJlUnwpyVd3tVDVaDaU idhg==
X-Gm-Message-State: AA+aEWZUx+FiPQJaSbxzr3T0BMwD7P3pvvRvsBQCkiudkx3Tu7CEraa7 umuSC3HEWSVRjFjAYwyuZwdNc2AQHKCi9Yu2QIWSTA==
X-Google-Smtp-Source: AFSGD/UKdmU16AOtBE4J9jsikKhd/6FDcSJdIvUiaDj6N5ZNmnyAzn+ZSR3FJZ5wZHr5qos+rPT3XTh419rsNGmZ7QM=
X-Received: by 2002:a19:574d:: with SMTP id l74mr30531731lfb.5.1546883555030; Mon, 07 Jan 2019 09:52:35 -0800 (PST)
MIME-Version: 1.0
From: Eugene Reznik <ujenreznik@gmail.com>
Date: Mon, 7 Jan 2019 19:52:24 +0200
Message-ID: <CANs5VwfTkuvWFyQ7xe3yPAz4t4y+kdc8rWaW1DtMQQiSzmSwGw@mail.gmail.com>
To: manet@ietf.org
Content-Type: multipart/alternative; boundary="000000000000ce7ab8057ee1e48e"
Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/wbRoOV7GrY9tPxJ0z4tvxednywo>
Subject: [manet] Clarification on DLEP RFC 8175
X-BeenThere: manet@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Mobile Ad-hoc Networks <manet.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/manet>, <mailto:manet-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/manet/>
List-Post: <mailto:manet@ietf.org>
List-Help: <mailto:manet-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/manet>, <mailto:manet-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 07 Jan 2019 17:52:39 -0000

Hello,

I have a question about the DLEP RFC and specifically about the discovery
process.
In paragraph 12.3 Peer Discovery signal RFC says:
" A Peer Discovery Signal MUST be encoded within a UDP packet. The
destination MUST be set to the DLEP well-known address and port number. "

In paragraph 12.4 Peer Offer Signal RFC says:
" A Peer Offer Signal MUST be encoded within a UDP packet. The IP source
and destination fields in the packet MUST be set by swapping the values
received in the Peer Discovery Signal. "

In paragraph 15.15 RFC says:
"DLEP IPv4 Link-Local Multicast Address IANA has assigned the IPv4
multicast address 224.0.0.117 in the registry found at ..."

As far as I understand, these rules essentially lead to the following
situation: the modem MUST form a UDP packet where the source IP address is
multicast 224.0.0.117.
Can you please clarify if this is the intention of RFC or did I
misunderstand it?

Regards,
Evgeniy Reznik.