<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=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-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;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.m-2940071027920571956msolistparagraph, li.m-2940071027920571956msolistparagraph, div.m-2940071027920571956msolistparagraph
{mso-style-name:m_-2940071027920571956msolistparagraph;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.m-2940071027920571956m128766250028595583msolistparagraph, li.m-2940071027920571956m128766250028595583msolistparagraph, div.m-2940071027920571956m128766250028595583msolistparagraph
{mso-style-name:m_-2940071027920571956m128766250028595583msolistparagraph;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.m-2940071027920571956gmailsignatureprefix
{mso-style-name:m_-2940071027920571956gmailsignatureprefix;}
span.E-MailFormatvorlage22
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.E-MailFormatvorlage24
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:923147096;
mso-list-template-ids:-1958312258;}
@list l0:level1
{mso-level-tab-stop:36.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-tab-stop:72.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-tab-stop:108.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level4
{mso-level-tab-stop:144.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-tab-stop:180.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-tab-stop:216.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level7
{mso-level-tab-stop:252.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-tab-stop:288.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-tab-stop:324.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1
{mso-list-id:1106534235;
mso-list-template-ids:-314555894;}
@list l1:level1
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:36.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level2
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:72.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level3
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:108.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level4
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:144.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level5
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:180.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level6
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:216.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level7
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:252.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level8
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:288.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level9
{mso-level-number-format:alpha-upper;
mso-level-tab-stop:324.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l2
{mso-list-id:1915242657;
mso-list-type:hybrid;
mso-list-template-ids:-2121886494 1282996710 67567619 67567621 67567617 67567619 67567621 67567617 67567619 67567621;}
@list l2:level1
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;
mso-fareast-font-family:Calibri;
mso-bidi-font-family:"Times New Roman";}
@list l2:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l2:level3
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l2:level4
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l2:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l2:level6
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l2:level7
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l2:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l2:level9
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></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="DE" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Personally I see them as two separated threads, 1) BP sockets and 2) IP islands within an e2e BP architecture, whose idea was pushed by Nanjing university at the last Fall meeting. I
also see point 1) more implementation oriented than actually driving any specific standardization action (unless we target at some point a green book to report about DTN implementations). Point 2) could be something for the SIS (but not SIS-DTN) or SEA area
(but with the support of SIS-DTN).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Tomaso
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b>Von:</b> SIS-DTN <sis-dtn-bounces@mailman.ccsds.org> <b>Im Auftrag von
</b>Deaton, Joshua E. (MSFC-HP27)[MOSSI2] via SIS-DTN<br>
<b>Gesendet:</b> Montag, 11. März 2024 16:54<br>
<b>An:</b> sburleig.sb@gmail.com; Mayer, Jeremy <Jeremy.Mayer@dlr.de>; Felix.Flentge@esa.int; vint@google.com<br>
<b>Cc:</b> sis-dtn@mailman.ccsds.org<br>
<b>Betreff:</b> Re: [Sis-dtn] [EXTERNAL] [BULK] Re: BP Sockets [was RE: IP networking within DTN-based protocol architectures]<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">While this does look interesting and would definitely have merit in existing I’m not sure what standardization would be needed. This really just looks like another implementation at this point. Also, I’m not sure how
this relates to the original question of creating a group for how to handle IP over BP. In that regard I do think a new group would be good as we’ve stated several times that we think it is outside the scope of the SIS-DTN group. I do think there needs to
be discussion on what exactly we mean by IP over BP, whether we are going to simply encapsulate an IP packet vs removing the payload from the IP packet a.k.a terminating the transport layer at the bundle creation point.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Joshua Deaton<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> <a href="mailto:sburleig.sb@gmail.com">
sburleig.sb@gmail.com</a> <<a href="mailto:sburleig.sb@gmail.com">sburleig.sb@gmail.com</a>>
<br>
<b>Sent:</b> Monday, March 11, 2024 10:34 AM<br>
<b>To:</b> Deaton, Joshua E. (MSFC-HP27)[MOSSI2] <<a href="mailto:joshua.e.deaton@nasa.gov">joshua.e.deaton@nasa.gov</a>>; Mayer, Jeremy P. (JSC-OT/ESA)[EUROPEAN SPACE AGENCY] <<a href="mailto:jeremy.mayer@dlr.de">jeremy.mayer@dlr.de</a>>;
<a href="mailto:Felix.Flentge@esa.int">Felix.Flentge@esa.int</a>; <a href="mailto:vint@google.com">
vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: [EXTERNAL] [BULK] Re: [Sis-dtn] BP Sockets [was RE: IP networking within DTN-based protocol architectures]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" align="left" style="border:solid black 1.5pt">
<tbody>
<tr>
<td width="100%" style="width:100.0%;border:none;background:#FFEB9C;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly">
<b><span style="font-size:10.0pt;color:black">CAUTION:</span></b><span style="color:black">
</span><span style="font-size:10.0pt;color:black">This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.</span><span style="color:black">
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos">The way I conceive it is something like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">int bpFd;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">const void *serializedAdu;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">size_t aduLen;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">int flags;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">const struct sockaddr *destEid;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">socklen_t eidLen;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">bpFd = socket(AF_BP, SOCK_RAW, 0);<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">/* Maybe some sockopt() calls. */<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">/* Set destEid, eidLen, maybe flags. */<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">if (sendto(bpFd, serializedAdu, aduLen, flags, destEid, eidLen) < 0)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">{<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"> perror(“Failed to send application data.”);<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">}<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos">The implementation and configuration of BP in the sockets code would determine the means by which the data would be transferred. That implementation could be any BP implementation, configured
in the same general way that we configure BPAs now, so it would have a convergence layer interface that might invoke TCP or UDP or (directly) IP or LTP or CCSDS encapsulation packets protocol. No need to displace anything, no need even to forego the use of
TCP (under BP) for bundle transmission.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos">Scott<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Deaton, Joshua E. (MSFC-HP27)[MOSSI2] <<a href="mailto:joshua.e.deaton@nasa.gov">joshua.e.deaton@nasa.gov</a>>
<br>
<b>Sent:</b> Monday, March 11, 2024 7:40 AM<br>
<b>To:</b> <a href="mailto:sburleig.sb@gmail.com">sburleig.sb@gmail.com</a>; Mayer, Jeremy P. (JSC-OT/ESA)[EUROPEAN SPACE AGENCY] <<a href="mailto:jeremy.mayer@dlr.de">jeremy.mayer@dlr.de</a>>;
<a href="mailto:Felix.Flentge@esa.int">Felix.Flentge@esa.int</a>; <a href="mailto:vint@google.com">
vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: [EXTERNAL] [BULK] Re: [Sis-dtn] BP Sockets [was RE: IP networking within DTN-based protocol architectures]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Just to make sure I am following correctly; the current suggestion is to create a POSIX (BSD) Socket Specification for BP where we are putting BP directly on top of IP without TCP/UDP or are we trying to fully displace
IP all the way down and so BP replaces IP at layer 3.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Joshua Deaton<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>sburleig.sb--- via SIS-DTN<br>
<b>Sent:</b> Monday, March 11, 2024 9:22 AM<br>
<b>To:</b> Mayer, Jeremy P. (JSC-OT/ESA)[EUROPEAN SPACE AGENCY] <<a href="mailto:jeremy.mayer@dlr.de">jeremy.mayer@dlr.de</a>>;
<a href="mailto:Felix.Flentge@esa.int">Felix.Flentge@esa.int</a>; <a href="mailto:vint@google.com">
vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> [EXTERNAL] [BULK] Re: [Sis-dtn] BP Sockets [was RE: IP networking within DTN-based protocol architectures]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" align="left" style="border:solid black 1.5pt">
<tbody>
<tr>
<td width="100%" style="width:100.0%;border:none;background:#FFEB9C;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly">
<b><span style="font-size:10.0pt;color:black">CAUTION:</span></b><span style="color:black">
</span><span style="font-size:10.0pt;color:black">This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.</span><span style="color:black">
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos">Right, the service interface in the CCSDS BP specification -- like all service specifications -- is abstract; it defines the properties of a BP API for the purpose of explaining the required
behavior of a Bundle Protocol Agent. Any number of existing and future BP implementations with very different APIs can be wholly conformant to that specification. But a BP sockets specification would enable any application that currently communicates over
POSIX (BSD) sockets to use BP instead of UDP without extensive code changes; the syntax is already in place. That’s the compelling advantage of the idea.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos">Scott<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> <a href="mailto:Jeremy.Mayer@dlr.de">
Jeremy.Mayer@dlr.de</a> <<a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a>>
<br>
<b>Sent:</b> Monday, March 11, 2024 3:48 AM<br>
<b>To:</b> <a href="mailto:Felix.Flentge@esa.int">Felix.Flentge@esa.int</a>; <a href="mailto:sburleig.sb@gmail.com">
sburleig.sb@gmail.com</a>; <a href="mailto:vint@google.com">vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: BP Sockets [was RE: [Sis-dtn] IP networking within DTN-based protocol architectures]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">In the abstract, I’d say so, but (let’s be honest) many developers tend to ignore the abstract notion of the service interface and prefer to have a tangible set of API operations.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Jeremy<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Felix Flentge <<a href="mailto:Felix.Flentge@esa.int">Felix.Flentge@esa.int</a>>
<br>
<b>Sent:</b> Montag, 11. März 2024 11:46<br>
<b>To:</b> <a href="mailto:sburleig.sb@gmail.com">sburleig.sb@gmail.com</a>; Mayer, Jeremy <<a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a>>;
<a href="mailto:vint@google.com">vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> BP Sockets [was RE: [Sis-dtn] IP networking within DTN-based protocol architectures]<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I like the idea but isn’t this already covered (partially) by the CCSSDS BP service interface, eg:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Bind – register EID in passive state<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Listen – </span>register EID in active state<span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Connect – sets a default destination for future send.request<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Send – send.request <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Recv – poll.request<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-GB">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Felix<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>sburleig.sb--- via SIS-DTN<br>
<b>Sent:</b> Saturday, March 9, 2024 6:56 PM<br>
<b>To:</b> <a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a>; <a href="mailto:vint@google.com">
vint@google.com</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">Thanks for that analysis, Jeremy. We’ve been talking about at least since STINT several years ago, and I really think it’s an idea whose time has come.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos">Scott<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Aptos"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US">From:</span></b><span lang="EN-US">
<a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a> <<a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a>>
<br>
<b>Sent:</b> Saturday, March 9, 2024 8:01 AM<br>
<b>To:</b> <a href="mailto:vint@google.com">vint@google.com</a>; <a href="mailto:sburleig.sb@gmail.com">
sburleig.sb@gmail.com</a><br>
<b>Cc:</b> <a href="mailto:Tomaso.deCola@dlr.de">Tomaso.deCola@dlr.de</a>; <a href="mailto:sis-dtn@mailman.ccsds.org">
sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> RE: [Sis-dtn] IP networking within DTN-based protocol architectures<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB">That’s a fair point. Generally, I’d say that BP-POSIX could work with the following:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Bind – works: sets source EID.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Listen – works; sets source EID and opens reception.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Connect – UDP style, sets default destination address.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Send – only valid for connected bundlesocks.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Sendto/sendmsg – works.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Recv – works.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Recvfrom/recvmsg – works, probably should support “wildcard” EIDs, at least for services.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Getaddrinfo and friends – not required<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo2">
<![if !supportLists]><span lang="EN-GB" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">Select – Works, highly implementation dependent.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB">BSD sockets really do work for everything!<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB">Jeremy<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-GB"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Vint Cerf <<a href="mailto:vint@google.com">vint@google.com</a>>
<br>
<b>Sent:</b> Samstag, 9. März 2024 16:51<br>
<b>To:</b> Scott Burleigh <<a href="mailto:sburleig.sb@gmail.com">sburleig.sb@gmail.com</a>><br>
<b>Cc:</b> Mayer, Jeremy <<a href="mailto:Jeremy.Mayer@dlr.de">Jeremy.Mayer@dlr.de</a>>; de Cola, Tomaso <<a href="mailto:Tomaso.deCola@dlr.de">Tomaso.deCola@dlr.de</a>>; Dr. Keith L Scott via SIS-DTN <<a href="mailto:sis-dtn@mailman.ccsds.org">sis-dtn@mailman.ccsds.org</a>><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">Yes generally speaking<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">On Sat, Mar 9, 2024, 10:43 <<a href="mailto:sburleig.sb@gmail.com">sburleig.sb@gmail.com</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US" style="font-family:Aptos">I think we get closer to BSD/POSIX if we use UDP as a model. The attenuated UDP notion of connect() would work for BP, I think.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US" style="font-family:Aptos"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US" style="font-family:Aptos">Scott</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US" style="font-family:Aptos"> </span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<b><span lang="EN-US">From:</span></b><span lang="EN-US"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Jeremy Mayer via SIS-DTN<br>
<b>Sent:</b> Saturday, March 9, 2024 12:35 AM<br>
<b>To:</b> <a href="mailto:vint@google.com" target="_blank">vint@google.com</a>; <a href="mailto:Tomaso.deCola@dlr.de" target="_blank">
Tomaso.deCola@dlr.de</a><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">Hi,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">I’m tempted to agree. I’ve seen limited utility in IP->BP encap, as (other than some unidirectional UDP-based applications), the assumptions made in IP networks (especially TCP) do not scale well to DTN environments. The two largest issues
I see are:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="m-2940071027920571956msolistparagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo4">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">A.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">The assumption that relatively low-latency and bidirectional communication is available.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="m-2940071027920571956msolistparagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo4">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">B.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-GB">The layering of stream and message-based semantics.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">Almost every TCP-ish application which I’ve seen run over BP winds up with exceptionally low performance, unless some sort of PEP is integrated, which adds complexity, failure points, and fragility.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">+1 for the notion of a standard API though, with the additional caveat that we should standardize nomenclature across implementations. We could likely reuse about 80% of the BSD/POSIX interface for BP, with the notable exception of connect.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">Thanks,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB">Jeremy</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-GB"> </span><span lang="EN-US"><o:p></o:p></span></p>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<b><span lang="EN-US">From:</span></b><span lang="EN-US"> SIS-DTN <<a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target="_blank">sis-dtn-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Vint Cerf via SIS-DTN<br>
<b>Sent:</b> Freitag, 8. März 2024 12:31<br>
<b>To:</b> de Cola, Tomaso <<a href="mailto:Tomaso.deCola@dlr.de" target="_blank">Tomaso.deCola@dlr.de</a>><br>
<b>Cc:</b> <a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sis-dtn] IP networking within DTN-based protocol architectures<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
The more I think about this, the less I like trying to manage off-Earth IP networks remotely. I think I would much rather see native applications running over BP. In any case we need to develop standard APIs for BP, such as the Sockets interface for Linux/Unix/Posix. <span lang="EN-US"><o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
We do need to figure out how IP-based and BP-based applications interwork. What do Domain Names mean in the BP context for example. <span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
v<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
On Fri, Mar 8, 2024 at 4:24 AM Tomaso de Cola via SIS-DTN <<a href="mailto:sis-dtn@mailman.ccsds.org" target="_blank">sis-dtn@mailman.ccsds.org</a>> wrote:<span lang="EN-US"><o:p></o:p></span></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
Dear All,<span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">as mentioned yesterday during our DTN weekly, during the past Fall meeting a presentation was given by University of Nanjing with the support of Chinese agency about IP-networking within DTN-based protocol stacks, especially for planetary
network segments (i.e. what is often referred to as IP-islands). <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">The link to that presentation is as follows:<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><a href="https://cwe.ccsds.org/sis/docs/SIS-DTN/Meeting%20Materials/2023/Fall%202023%20SIS-DTN/Possible%20BOF%20Discussion.pptx?d=w44d31f0b3be649e4bf24ec4ae50479a1" target="_blank">https://cwe.ccsds.org/sis/docs/SIS-DTN/Meeting%20Materials/2023/Fall%202023%20SIS-DTN/Possible%20BOF%20Discussion.pptx?d=w44d31f0b3be649e4bf24ec4ae50479a1</a><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">The proposal made there was for a BOF (i.e. towards a WG formation), which I see however too premature. On the contrary, I’d be more in favour for a SIG (Special Interest Group), happening outside the DTN WG.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">As discussed yesterday, key points to clarify/agree are:<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="m-2940071027920571956m128766250028595583msolistparagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo6">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Is the proposal sound and meaningful to be addressed?<o:p></o:p></span></p>
<p class="m-2940071027920571956m128766250028595583msolistparagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo6">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Is appropriate for the SIS area or should be better addressed at architectural level in SEA (maybe it can be even a cross-area initiative)?<o:p></o:p></span></p>
<p class="m-2940071027920571956m128766250028595583msolistparagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo6">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">In the case of SIS, is there significant support to start this? In other words, which agencies have interest in contributing to this activity?<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">Thank you for sharing comments/objections/suggestions.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">Have a nice weekend,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US">Tomaso<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">————————————————————————</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif">
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">Deutsches Zentrum für Luft- und Raumfahrt</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray"> (DLR)</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">German Aerospace Center</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">Institute of Communications and Navigation | Satellite Networks | Oberpfaffenhofen | 82234 Wessling | Germany</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D">
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<b><span lang="IT" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">Tomaso de Cola, Ph.D.</span></b><span lang="IT" style="color:#1F497D"> |
</span><b><span lang="IT" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">Integrated Satellite Systems (INS) Team Leader<br>
</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:dimgray">Telefon
<a href="tel:+49%208153%20282156" target="_blank">+49 8153 28-2156</a> | Telefax
<a href="tel:+49%208153%20282844" target="_blank">+49 8153 28-2844</a> |</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">
</span><span lang="EN-US" style="color:#1F497D"><a href="mailto:sandro.scalise@dlr.de" target="_blank"><span lang="DE" style="font-size:10.0pt;font-family:"Arial",sans-serif">tomaso.decola@dlr.de</span></a></span><span style="color:#1F497D">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><a href="http://www.dlr.de/kn/institut/abteilungen/san" target="_blank"><span lang="DE">http://www.dlr.de/kn/institut/abteilungen/san</span></a></span><span lang="EN-US" style="color:#1F497D">
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
_______________________________________________<br>
SIS-DTN mailing list<br>
<a href="mailto:SIS-DTN@mailman.ccsds.org" target="_blank">SIS-DTN@mailman.ccsds.org</a><br>
<a href="https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-dtn" target="_blank">https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-dtn</a><span lang="EN-US"><o:p></o:p></span></p>
</div>
</blockquote>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<br clear="all">
<span lang="EN-US"><o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span class="m-2940071027920571956gmailsignatureprefix">-- </span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
Please send any postal/overnight deliveries to:<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
Vint Cerf<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
Google, LLC<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
1900 Reston Metro Plaza, 16th Floor<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
Reston, VA 20190<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
+1 (571) 213 1346<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
until further notice<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class="MsoNormal"><span lang="EN-GB">This message is intended only for the recipient(s) named above. It may contain proprietary information and/or protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have
received this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (<a href="mailto:dpo@esa.int">dpo@esa.int</a>).
<o:p></o:p></span></p>
</div>
</div>
</div>
</body>
</html>