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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D">Hello Holger,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D">Thank you for the quick update. What you have noted sounds very good and I think we are indeed in agreement.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D">-Erik<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>From:</b> Holger.Dreihahn@esa.int <Holger.Dreihahn@esa.int>
<br>
<b>Sent:</b> Thursday, December 5, 2019 23:07<br>
<b>To:</b> Barkley, Erik J (US 3970) <erik.j.barkley@jpl.nasa.gov><br>
<b>Cc:</b> CCSDS_CSTSWG (css-csts@mailman.ccsds.org) <css-csts@mailman.ccsds.org>; CSS-CSTS <css-csts-bounces@mailman.ccsds.org>; EXTERNAL-Pietras, John V (US 332C-Affiliate) <john.pietras@gst.com>; CCSDS Service Mgmt WG <smwg@mailman.ccsds.org>; Wolfgang Hell
<wo_._he@t-online.de><br>
<b>Subject:</b> [EXTERNAL] Re: [Css-csts] Issue regarding initiator-identifier and responder-identifier<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi Erik,</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">For the business of the initiator identifier and responder identifier we noted yesterday the following:</span>
<br>
<br>
<i><span style="font-size:10.0pt;font-family:"Arial",sans-serif">The WG agrees that initiator ID, responder ID and responder port ID are in the FR model. Wolfgang will add them for SLE. A comment will be added in the semantic definition. John will use that
approach as well.</span></i> <o:p></o:p></p>
<p><i><span style="font-size:10.0pt;font-family:"Arial",sans-serif">The decision if these parameters (like all parameters) are used for a particular MD SI configuration within a service agreement / configuration profiles is left to Service Management.</span></i>
<o:p></o:p></p>
<p><br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">So the FRM will be complete and CSSM will take care when they are used. I think this should address your point and to me it feels right to go that way.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Best regards,</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Holger</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Holger Dreihahn<br>
European Spacecraft Operations Centre | European Space Agency | S-431<br>
+49 6151 90 2233 | </span><a href="http://www.esa.int/esoc"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">http://www.esa.int/esoc</span></a>
<br>
<br>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"Barkley, Erik J\(US 3970\) via CSS-CSTS" <<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"EXTERNAL-Pietras, John V (US 332C-Affiliate)" <<a href="mailto:john.pietras@gst.com">john.pietras@gst.com</a>>,
"CCSDS_CSTSWG (<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>)" <<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>>, "Wolfgang Hell" <<a href="mailto:wo_._he@t-online.de">wo_._he@t-online.de</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Cc: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"CCSDS Service Mgmt WG" <<a href="mailto:smwg@mailman.ccsds.org">smwg@mailman.ccsds.org</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">05/12/2019 23:09</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Re: [Css-csts] Issue regarding initiator-identifier and responder-identifier</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Sent by: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"CSS-CSTS" <<a href="mailto:css-csts-bounces@mailman.ccsds.org">css-csts-bounces@mailman.ccsds.org</a>></span>
<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080">John et al,</span>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080"> </span>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080">I think this is one of the issues that needs to be coordinated at the area level. As you have noted via your reference to the technote, the CSSM WG intends to essentially base the detailed
content of the configuration profile on the parameters stated in the FRM. It seems to me that it will be a substantially non-trivial enough job to pull off without having to resort to yet another mechanism other than FRs for stating the various initiator and
responder identifiers. I can appreciate the sensitive info/security concerns, but I think having the complete model is also important. From the CSSM perspective, it may in fact be more secure if this information is carried in the service package – SPDF book
-- (via modified result data set) such that you could in effect have “rolling” identifiers specific for instances that change tracking-pass to tracking-pass (assuming that the SP is itself encrypted signed and/or block-chained, etc). I think this might need
a broader discussion and so I am also copying the CSSM WG for cognizance. Unfortunately I was not able to attend the CSTS WG telecon scheduled for earlier today so perhaps this is overcome by events but I just wanted to see if we might come to a broader consensus
-- I tend to agree with your approach 3.</span> <br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080"> </span>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080">Best regards,</span>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080">-Erik </span>
<br>
<span style="font-size:12.0pt;font-family:"Georgia",serif;color:#004080"> </span>
<br>
<b><span style="font-size:12.0pt">From:</span></b><span style="font-size:12.0pt"> CSS-CSTS <<a href="mailto:css-csts-bounces@mailman.ccsds.org">css-csts-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>John Pietras<b><br>
Sent:</b> Tuesday, December 3, 2019 08:10<b><br>
To:</b> CCSDS_CSTSWG (<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>) <<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>>; Wolfgang Hell <<a href="mailto:wo_._he@t-online.de">wo_._he@t-online.de</a>><b><br>
Subject:</b> [EXTERNAL] [Css-csts] Issue regarding initiator-identifier and responder-identifier</span>
<br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">CSTSWG colleagues ---</span> <br>
<span style="font-size:12.0pt">Recently (perhaps in Darmstadt?) Wolfgang and I discussed whether the initiator-identifier and responder-identifier parameters of the Association Control procedure should be in the list of configuration parameters for a(n) SLE/CS
Transfer Service Provider FR. I had envisioned including them but Wolfgang has excluded them from his SLE TS Provider FRs (FCLTU, RAF, etc.). When we discussed it he stated his belief that they should not be in the FR definition because that is sensitive information
that should not be accessible by, for instance, MD-CSTS. Rather, Wolfgang argued, this information should be exchanged by some “other” (not specified by CCSDS) means. Conceptually, this other mechanism would contain these identifiers in a table that has as
a key into it the service-instance-identifier, which *<b>is</b>* in the FR definition. In particular Wolfgang said that he did not think that these parameters should be included in the configuration profiles that would be used for scheduling Service Packages.
Wolfgang’s argument made sense to me and I agreed with his logic, and planned to remove those parameters from the CSTS Provider FRs for which I am responsible – Forward Frame, Monitored Data, and Tracking Data.</span>
<br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">HOWEVER, I now realize that the FF, MD, and TD books *<b>all</b>* identify these two parameters as “service management” parameters and assign them their service-specific classifiers. The assignment of the classifiers implies that
these are to be registered as configuration parameters of the respective FRs, and there is *<b>no</b>* indication in any of the documentation that they are to be treated in a special manner – i.e., be excluded from the definition of the FRs that are registered
in SANA. </span><br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">Off the top of my head, I can think of several ways that we might remedy this problem:</span>
<o:p></o:p></p>
<ol start="1" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
<span style="font-size:12.0pt">Somehow redefine them as some sort of “special” configuration parameters (nor “normal” service management parameters) in the FF, TD, and MD service specifications. E.g., no classifiers would be specified. This would involve tweaking
the FF book (relatively easy), TD book (a bit harder since it’s already been submitted to the Secretariat) and the MD book (involves a TC since it has already been published).</span>
<o:p></o:p></li></ol>
<ol start="2" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo3">
<span style="font-size:12.0pt">Leave them as configuration parameters of the FRs and add them to the SANA Registry FR definitions, but include caveats on their definitions that recommend that they not be included in configuration profile and GET-able only under
highly secure circumstances. This approach (a) has no impact on the CSTS books and (b) allows whatever mechanisms that *<b>are</b>* used to leverage the existing information architecture – e.g., a privileged, secure instance of MD-CSTS could be implemented
that would be permitted to read these values (e.g., to confirm their real-time setting if the service user is having problems binding).</span>
<o:p></o:p></li></ol>
<ol start="3" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo4">
<span style="font-size:12.0pt">Similar to option 2, leave them as configuration parameters of the FRs and add them to the SANA Registry FR definitions, but let the SMWG decide on and enforce the restrictions in the Configuration Profile specification, and let
the Agencies/Providers decide who can read these parameters.</span><o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt">My preference would be for something along the lines of options 2 or 3.
</span><br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">In a somewhat related topic, there is also the responder-port-id parameter that is specified in the existing CSTS specifications as a service management parameter. Whatever we decide to do about the initiator-identifier and responder-identifier
parameters, we need to include the responder-port-id parameter as a parameter of FR because it *<b>does</b>* need to be in the configuration profiles in order to support the dynamic allocation method of TCP Socket scheduling that the SMWG wants to support
(see section 3.4.2 of </span><a href="https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Tech%20Note%20Development/Config%20Profile%20Svc%20Agreement%20Tech%20Note/Simplified%20ConfigProfilesAndSvcAgreements_TechNote-v1x4-clean.docx?Web=1"><span style="font-size:12.0pt;color:#0082BF">https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Tech%20Note%20Development/Config%20Profile%20Svc%20Agreement%20Tech%20Note/Simplified%20ConfigProfilesAndSvcAgreements_TechNote-v1x4-clean.docx?Web=1</span></a><span style="font-size:12.0pt">)</span>
<br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">I don’t know if we’ll have time to discuss this on Thursday but we do need to resolve these issues.</span>
<br>
<span style="font-size:12.0pt"> </span> <br>
<span style="font-size:12.0pt">Best regards,</span> <br>
<span style="font-size:12.0pt">John</span> <br>
<span style="font-size:12.0pt"> </span><tt><span style="font-size:10.0pt">_______________________________________________</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
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