From: Ron Bonica <rbonica@juniper.net>
To: Tal Mizrahi <tal.mizrahi.phd@gmail.com>, Xiao Min <xiao.min2@zte.com.cn>,
        Xiaoming He <hexm4@chinatelecom.cn>, int-area <int-area@ietf.org>,
        "Eric
 Vyncke (evyncke)" <evyncke@cisco.com>
Thread-Topic: New Version Notification for
 draft-ietf-intarea-icmp-exten-hdr-len-05.txt
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Date: Tue, 5 Aug 2025 17:29:45 +0000
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Updated to address Joe Touch's IETF Last Call comments




Juniper Business Use Only

________________________________
From: internet-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Tuesday, August 5, 2025 1:12 PM
To: Ron Bonica <rbonica@juniper.net>; Tal Mizrahi <tal.mizrahi.phd@gmail.co=
m>; Xiao Min <xiao.min2@zte.com.cn>; Xiaoming He <hexm4@chinatelecom.cn>
Subject: New Version Notification for draft-ietf-intarea-icmp-exten-hdr-len=
-05.txt

[External Email. Be cautious of content]


A new version of Internet-Draft draft-ietf-intarea-icmp-exten-hdr-len-05.tx=
t
has been successfully submitted by Ron Bonica and posted to the
IETF repository.

Name:     draft-ietf-intarea-icmp-exten-hdr-len
Revision: 05
Title:    ICMP Extension Structure Length Field
Date:     2025-08-05
Group:    intarea
Pages:    6
URL:     https://www.ietf.org/archive/id/draft-ietf-intarea-icmp-exten-hdr-=
len-05.txt
Status:   https://datatracker.ietf.org/doc/draft-ietf-intarea-icmp-exten-hd=
r-len/
HTML:   https://www.ietf.org/archive/id/draft-ietf-intarea-icmp-exten-hdr-l=
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HTMLized: https://datatracker.ietf.org/doc/html/draft-ietf-intarea-icmp-ext=
en-hdr-len
Diff:   https://author-tools.ietf.org/iddiff?url2=3Ddraft-ietf-intarea-icmp=
-exten-hdr-len-05

Abstract:

   The ICMP Extension Structure (RFC4884) does not have a length field.
   Therefore, unless the length of the Extension Structure can be
   inferred from other data in the ICMP message, the Extension Structure
   must be the last item in the ICMP message.

   This document updates RFC 4884 to define a length field for the ICMP
   Extension Structure.  When length information is provided, receivers
   can use it to parse ICMP messages.  Specifically, receivers can use
   length information to determine the offset at which the item after
   the ICMP Extension Structure begins.



The IETF Secretariat



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<b>From:</b>&nbsp;internet-drafts@ietf.org &lt;internet-drafts@ietf.org&gt;=
<br>
<b>Sent:</b>&nbsp;Tuesday, August 5, 2025 1:12 PM<br>
<b>To:</b>&nbsp;Ron Bonica &lt;rbonica@juniper.net&gt;; Tal Mizrahi &lt;tal=
.mizrahi.phd@gmail.com&gt;; Xiao Min &lt;xiao.min2@zte.com.cn&gt;; Xiaoming=
 He &lt;hexm4@chinatelecom.cn&gt;<br>
<b>Subject:</b>&nbsp;New Version Notification for draft-ietf-intarea-icmp-e=
xten-hdr-len-05.txt
</div>
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<br>
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<div style=3D"font-size: 11pt;">[External Email. Be cautious of content]<br=
>
<br>
<br>
A new version of Internet-Draft draft-ietf-intarea-icmp-exten-hdr-len-05.tx=
t<br>
has been successfully submitted by Ron Bonica and posted to the<br>
IETF repository.<br>
<br>
Name:&nbsp;&nbsp;&nbsp;&nbsp; draft-ietf-intarea-icmp-exten-hdr-len<br>
Revision: 05<br>
Title:&nbsp;&nbsp;&nbsp; ICMP Extension Structure Length Field<br>
Date:&nbsp;&nbsp;&nbsp;&nbsp; 2025-08-05<br>
Group:&nbsp;&nbsp;&nbsp; intarea<br>
Pages:&nbsp;&nbsp;&nbsp; 6</div>
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s://www.ietf.org/archive/id/draft-ietf-intarea-icmp-exten-hdr-len-05.html</=
a></span></div>
<div style=3D"font-size: 11pt;" class=3D"elementToProof">HTMLized: <span st=
yle=3D"color: rgb(0, 0, 0);">
<a id=3D"LPlnk396235" href=3D"https://datatracker.ietf.org/doc/html/draft-i=
etf-intarea-icmp-exten-hdr-len">https://datatracker.ietf.org/doc/html/draft=
-ietf-intarea-icmp-exten-hdr-len</a></span></div>
<div style=3D"font-size: 11pt;" class=3D"elementToProof">Diff:&nbsp; &nbsp;=
<span style=3D"color: rgb(0, 0, 0);"><a id=3D"LPlnk937340" href=3D"https://=
author-tools.ietf.org/iddiff?url2=3Ddraft-ietf-intarea-icmp-exten-hdr-len-0=
5">https://author-tools.ietf.org/iddiff?url2=3Ddraft-ietf-intarea-icmp-exte=
n-hdr-len-05</a></span></div>
<div style=3D"font-size: 11pt;" class=3D"elementToProof"><br>
</div>
<div style=3D"font-size: 11pt;">Abstract:<br>
<br>
&nbsp;&nbsp; The ICMP Extension Structure (RFC4884) does not have a length =
field.<br>
&nbsp;&nbsp; Therefore, unless the length of the Extension Structure can be=
<br>
&nbsp;&nbsp; inferred from other data in the ICMP message, the Extension St=
ructure<br>
&nbsp;&nbsp; must be the last item in the ICMP message.<br>
<br>
&nbsp;&nbsp; This document updates RFC 4884 to define a length field for th=
e ICMP<br>
&nbsp;&nbsp; Extension Structure.&nbsp; When length information is provided=
, receivers<br>
&nbsp;&nbsp; can use it to parse ICMP messages.&nbsp; Specifically, receive=
rs can use<br>
&nbsp;&nbsp; length information to determine the offset at which the item a=
fter<br>
&nbsp;&nbsp; the ICMP Extension Structure begins.<br>
<br>
<br>
<br>
The IETF Secretariat<br>
<br>
<br>
</div>
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