Subject: RE: [NSIS] End node detection in GIST for Messages relayed on behalf ofthe NSLP?

From: "Hancock, Robert" <[email-masked]>
Date: Fri, 9 Dec 2005 15:37:34 -0000

hi all,

my personal view is that it is the responsibility of the
NSLP (or other implementation support code) to detect that
there is no point in invoking GIST to send a message 
because the destination for the message is known to be inside 
the same node as the origin. there are actually several 
circumstances where it makes sense to be able to do this,
but i'd rather focus the GIST specification on the node
external aspects.

robert h.

> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]] On 
> Behalf Of Thomas Herzog
> Sent: 11 November 2005 11:27
> To: [email-masked]
> Subject: [NSIS] End node detection in GIST for Messages 
> relayed on behalf ofthe NSLP?
> 
> 
> Hi, together,
> 
> as a result of having implemented the GIST level relaying on 
> behalf of the 
> NSLP, it occured to me, that if we are on the End Node of the 
> flow and NSLP 
> would indicate to "relay", the message would basically 
> "cycle", i.e. the NSLP 
> would get it delivered again and again. (if it is the actual 
> flow endpoint, 
> if it is the last GIST hop and the flow endpoint is not 
> GIST-aware, it would 
> simply be lost)
> 
> Is a NSLP supposed to do no such nonsense (it should know it 
> is the end node), 
> or is GIST supposed to do End Node detection in this case 
> also (as it does 
> for pure GIST relaying if there is no NSLP for the message)?
> 
> GIST could do End Node detection and provide a MessageStatus 
> for the message, 
> but there is no status code defined yet for such an event.
> 
> Or GIST could deliver the message again (being relayed to 
> itself, it will come 
> back) and NSLP could then detect that it is the actual End 
> Node by the fact 
> of receiving a already relayed Message?
> 
> Cheers, Thomas
> 
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