Subj : Re: ping netmail - Does M
To   : PSI-JACK
From : GRYPHON
Date : Thu Jan 31 2019 07:20 pm

On 09/02/14, Psi-Jack said the following...
 
 Ps> On 09/01/14, g00r00 said the following...
 Ps>  
 Ps>  g0> Let me make sure I understand exactly what you're asking for.
 Ps>  g0> 
 Ps>  g0> I've never heard of anything keying off of "ping" before.  If someone
 Ps>  g0> has a handle of "ping" then they would never get netmail!  What has t
 Ps>  g0> feature?  If I do something like this it probably wouldn't be ping bu
 Ps>  g0> something less likely to be someone's alias.
 Ps> 
 Ps> It's actually in the FTN spec for netmail, adopted about 15~20 years
 Ps> ago, to help locate routing issues. Learned about it just recently
 Ps> myself from Mark on Zone1 echomail conferences, as I'm trying to
 Ps> determine root cause for me not receiving netmail. 
 Ps> 
 Ps>  g0> Anyway...
 Ps>  g0> 
 Ps>  g0> You want a message sent to "ping" to be replied to automatically and
 Ps>  g0> include the PATH kludges, I get that part.  But then what happens to 
 Ps>  g0> What do you mean by continuing to send?  Send it to where?  Mystic
 Ps>  g0> shouldn't be touching netmails that aren't addressed to it ever, exce
 Ps>  g0> to reroute them if needed.
 Ps> 
 Ps> I mean, when I send a netmail to the username "ping" (w/o quotes), to an
 Ps> address, systems that get that netmail routed to it, if they follow the
 Ps> ping protocol spec, it creates a new netmail to send back to the
 Ps> origin's sender name and FTN address with the route path, while not
 Ps> touching the original netmail, allowing further routing, as necessary,
 Ps> to continue its due course to the final destination. 
 Ps> 
 Ps> I'll see if I can dig up more info on the actual spec... In fact, I just
 Ps> did..
 Ps> 
 Ps> http://ftsc.org/docs/fts-5001.002
 Ps> 
 Ps> Apparently there's also a PING flag as well in relation to this. 

According to those docs you posted, it all hinges on the fact as to whether or
not the dest node must fly the PING flag.  Presumably that flag is in the
nodelist.  What happens when nodes in the chain don't support the ping
function?

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