<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
h4
{mso-style-priority:9;
mso-style-link:"Heading 4 Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.Heading4Char
{mso-style-name:"Heading 4 Char";
mso-style-priority:9;
mso-style-link:"Heading 4";
font-family:"Times New Roman","serif";
font-weight:bold;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:"Courier New";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-line-height-alt:0pt;page-break-before:always">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-line-height-alt:0pt;page-break-before:always">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white">Please suggest if our understanding is correct for the below scenario.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-line-height-alt:0pt;page-break-before:always">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white">We had doubt regarding behavior of Responder during initial tunnel setup where IKE_AUTH request’s proposal substructure(in SA Payload) does not contain SPI for child-sa
creation.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-line-height-alt:0pt;page-break-before:always">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white">From RFC 5996 :</span><b><span style="font-size:12.0pt;font-family:"Courier New";color:black"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-line-height-alt:0pt;page-break-before:always">
<a href="http://tools.ietf.org/search/rfc5996#section-3.3.1"><b><span style="font-size:12.0pt;font-family:"Courier New";color:black">3.3.1</span></b></a><b><span style="font-size:12.0pt;font-family:"Courier New";color:black">. Proposal Substructure<o:p></o:p></span></b></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> 1 2 3<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> | 0 (last) or 2 | RESERVED | Proposal Length |<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> | Proposal Num | Protocol ID | SPI Size |Num Transforms|<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> ~ SPI (variable) ~<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> | |<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> ~ <Transforms> ~<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> | |<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span style="font-size:12.0pt;font-family:"Courier New";color:black"> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If the above header in IKE_AUTH REQ from the Initiator, contains “</span><span style="font-size:12.0pt;font-family:"Courier New";color:black">SPI Size”
</span><span style="color:#1F497D">as zero and SPI is not present, what should be the behavior of responder.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="color:#1F497D">In our opinion it should return “INVALID_SYNTAX” in the notify payload of the IKE_AUTH Response with no other payload present in it</span></b><span style="color:#1F497D">. Below is RFC reference.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Again, from the RFC 5996 :<o:p></o:p></span></p>
<h4 style="mso-line-height-alt:0pt;page-break-before:always"><a name="section-3.10.1"></a><a href="http://tools.ietf.org/search/rfc5996#section-3.10.1"><span style="font-family:"Courier New";color:black">3.10.1</span></a><span style="font-family:"Courier New";color:black">.
Notify Message Types<o:p></o:p></span></h4>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"><snip><o:p></o:p></span></pre>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"> INVALID_SYNTAX 7<o:p></o:p></span></pre>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"> Indicates the IKE message that was received was invalid because<o:p></o:p></span></pre>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"> some type, length, or value was out of range or because the<o:p></o:p></span></pre>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"> request was rejected for policy reasons.<o:p></o:p></span></pre>
<pre style="page-break-before:always"><span style="font-size:12.0pt;color:black"><snip><o:p></o:p></span></pre>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Navneet<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>