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My apologies for #2 below; what I said is wrong. The smallest
message will be 8 bytes, as the messageSpecification is not FEC
encoded. I will repair the doc as there are some issues with the
spec and layout...done. Once again the link is: <a
class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/zj2i1votg432b2p/FrameTypes.pptx?dl=0"><a class="moz-txt-link-freetext" href="https://www.dropbox.com/s/zj2i1votg432b2p/FrameTypes.pptx?dl=0">https://www.dropbox.com/s/zj2i1votg432b2p/FrameTypes.pptx?dl=0</a></a>
<ul>
<li>MessageSpecification is 8 bytes binary encoded.</li>
<li>Header is always asn.1 encoded</li>
<li>All messages may be FEC encoded with the FEC header asn.1
encoded.<br>
</li>
<li>Data Message payload is encrypted.</li>
</ul>
<br>
<br>
Change query:<br>
Regarding the Message Specification, with a hdrSize...I don't think
we need it. The message size includes everything + the 8 bytes spec.
The hdrType will specify the kind of message and header. The
specific header knows it's own size and layout. Therefor, we have
16bits free if we keep an 8 byte msgSpec. Let's rework it to a 7
byte msgSpec as below. Perhaps it is useful to be 64bit aligned, so
leave it at 8. Thoughts? Does this work?<br>
<br>
<br>
<small><b><big><big><big><font face="DejaVu Serif">msgSpec: 7 bytes
binary encoded</font></big></big></big></b></small><br>
<ul>
<li><big>HeaderSpecification: 3 bytes</big></li>
<ul>
<li>multicastSymbol: 6 bits</li>
<li>sanguinity: 7 bits</li>
</ul>
<ul>
<li>msgVersion: 5 bits</li>
<li>hdrType: 6 bits</li>
</ul>
<li><big>msgSize: 2nd word, 4 bytes</big></li>
<ul>
<li>4 bytes (total size with msgSpec, header, payload sizes)</li>
</ul>
</ul>
<br>
regards,<br>
robert<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/20/2015 07:01 AM, Robert Withers
wrote:<br>
</div>
<blockquote cite="mid:5676989D.8020201@gmail.com" type="cite">
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
Good morning, just a few comments and questions..<br>
<br>
<blockquote> 1) current 4bits for msgVersion and 4bits for
hdrType. With 14 messages and some not implemented
(suspend/resume/...) we have little headroom in 4bits of
hdrType. Shall I make the msgVersion 3bits and the hdrType
5bits?<br>
<br>
2) the smallest interleaved FEC encoded msg is 30 bytes. With 8
bytes of data: a msgSpec, using RS(15,9) with 4bit symbols, and
4 symbol block interleaving, the smallest on the wire is 30
bytes. Without FEC enabled is it 8 bytes.<br>
<br>
3) when run to the end of hdrType room, we can add a jump tag
and have a second hdrType field as the 9th byte.<br>
</blockquote>
<br>
Again, the valid document link is: <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/zj2i1votg432b2p/FrameTypes.pptx?dl=0">https://www.dropbox.com/s/zj2i1votg432b2p/FrameTypes.pptx?dl=0</a><br>
<br>
Thank you,<br>
robert<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/20/2015 06:20 AM, Clément Bera
wrote:<br>
</div>
<blockquote
cite="mid:CAJrdCbUzA=X3s3FmW+pF09P5iqJ7q=DWp9am-i=xcf1czxGzkQ@mail.gmail.com"
type="cite">
<pre wrap=""> </pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<div dir="ltr">
<div>Hello,</div>
<div><br>
</div>
I tried to get your document but I got:
<div><br>
</div>
<div>Dropbox - error</div>
<div><br>
</div>
<div>Is it only me ?</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-12-20 11:31 GMT+01:00 Robert
Withers <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:robert.w.withers@gmail.com" target="_blank">robert.w.withers@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Excuse me for failing to complete this email./ I wanted to
ask for feedback on these structures, especially the
header specification word structure. So these fields make
sense?<br>
<br>
thank you,<br>
robert
<div class="HOEnZb">
<div class="h5"><br>
<br>
On 12/20/2015 05:27 AM, Robert Withers wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"> I
wrote up the various SecureSession frame types in
presentation document, which you can get here: <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/3xfa5oqs8ihj88v/FrameTypes.pptx?dl=0"><a class="moz-txt-link-freetext" href="https://www.dropbox.com/s/3xfa5oqs8ihj88v/FrameTypes.pptx?dl=0">https://www.dropbox.com/s/3xfa5oqs8ihj88v/FrameTypes.pptx?dl=0</a></a><br>
<br>
These are not yet implemented, but it is
progressing. Ne quid nemis.<br>
<br>
thanks,<br>
</blockquote>
<br>
-- <br>
. .. .. ^,^ robert<br>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<div align="left">. .. .. ^,^ robert </div>
</div>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<div align="left">. .. .. ^,^ robert
</div>
</div>
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