<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="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 11 (filtered medium)">
<style>
<!--
 /* Style Definitions */
 p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:12.0pt;
        font-family:"Times New Roman";}
h1
        {margin-top:12.0pt;
        margin-right:0in;
        margin-bottom:3.0pt;
        margin-left:0in;
        page-break-after:avoid;
        font-size:16.0pt;
        font-family:Arial;}
h2
        {margin-top:12.0pt;
        margin-right:0in;
        margin-bottom:3.0pt;
        margin-left:.5in;
        text-indent:-.25in;
        page-break-after:avoid;
        mso-list:l3 level1 lfo4;
        font-size:14.0pt;
        font-family:Arial;
        font-weight:normal;
        font-style:italic;}
a:link, span.MsoHyperlink
        {color:blue;
        text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
        {color:purple;
        text-decoration:underline;}
p.Style1, li.Style1, div.Style1
        {margin-top:12.0pt;
        margin-right:0in;
        margin-bottom:3.0pt;
        margin-left:.5in;
        text-indent:-.25in;
        page-break-after:avoid;
        mso-list:l2 level1 lfo6;
        font-size:16.0pt;
        font-family:Arial;
        font-weight:bold;}
span.EmailStyle18
        {mso-style-type:personal-compose;
        font-family:Arial;
        color:windowtext;}
@page Section1
        {size:8.5in 11.0in;
        margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
        {page:Section1;}
 /* List Definitions */
 @list l0
        {mso-list-id:967319784;
        mso-list-type:hybrid;
        mso-list-template-ids:1571166384 1214559656 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
        {mso-level-tab-stop:.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level2
        {mso-level-tab-stop:1.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level3
        {mso-level-tab-stop:1.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level4
        {mso-level-tab-stop:2.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level5
        {mso-level-tab-stop:2.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level6
        {mso-level-tab-stop:3.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level7
        {mso-level-tab-stop:3.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level8
        {mso-level-tab-stop:4.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l0:level9
        {mso-level-tab-stop:4.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l1
        {mso-list-id:1066757276;
        mso-list-template-ids:-1113959296;}
@list l1:level1
        {mso-level-start-at:2;
        mso-level-tab-stop:.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2
        {mso-list-id:1402632689;
        mso-list-type:hybrid;
        mso-list-template-ids:-403671720 -17909492 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l2:level1
        {mso-level-style-link:Style1;
        mso-level-tab-stop:.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level2
        {mso-level-tab-stop:1.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level3
        {mso-level-tab-stop:1.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level4
        {mso-level-tab-stop:2.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level5
        {mso-level-tab-stop:2.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level6
        {mso-level-tab-stop:3.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level7
        {mso-level-tab-stop:3.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level8
        {mso-level-tab-stop:4.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l2:level9
        {mso-level-tab-stop:4.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3
        {mso-list-id:1906723304;
        mso-list-type:hybrid;
        mso-list-template-ids:1063930220 -837144636 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l3:level1
        {mso-level-style-link:"Heading 2";
        mso-level-tab-stop:.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level2
        {mso-level-tab-stop:1.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level3
        {mso-level-tab-stop:1.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level4
        {mso-level-tab-stop:2.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level5
        {mso-level-tab-stop:2.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level6
        {mso-level-tab-stop:3.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level7
        {mso-level-tab-stop:3.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level8
        {mso-level-tab-stop:4.0in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l3:level9
        {mso-level-tab-stop:4.5in;
        mso-level-number-position:left;
        text-indent:-.25in;}
@list l4
        {mso-list-id:2052412781;
        mso-list-template-ids:448533782;}
ol
        {margin-bottom:0in;}
ul
        {margin-bottom:0in;}
-->
</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=Section1>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We have an RTSP server application running on the ADI
Blackfin DSP processor BF561, using VDK (Visual DSP Kit) as the operating
system, and Lwip for the TCP/IP stack. We are able to transfer data
successfully over the internet<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Now we need to add VPN/IPSec to the same setup to make the
data-transfer secure.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We have already been able to install Openswan IPSec and
setup a tunnel between 2 linux machines.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<ol style='margin-top:0in' start=1 type=1>
 <li class=MsoNormal style='mso-list:l0 level1 lfo9'><font size=2 face=Arial><span
     style='font-size:10.0pt;font-family:Arial'>Can we follow the same
     procedure to install openswan and setup a tunnel over uCLinux ?<o:p></o:p></span></font></li>
</ol>

<p class=MsoNormal style='margin-left:.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<ol style='margin-top:0in' start=2 type=1>
 <li class=MsoNormal style='mso-list:l0 level1 lfo9'><font size=2 face=Arial><span
     style='font-size:10.0pt;font-family:Arial'>How would our embedded
     application communicate with the IPsec module while sending and receiving
     data? Are there any APIs to get a handle to the IPSec module from our
     application? <o:p></o:p></span></font></li>
</ol>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Aparna<o:p></o:p></span></font></p>

</div>

</body>

</html>