🚀 go-pugleaf

[BOB's Question]
>  code that I can't seem to find the answers to.  Some of these are:
>  What do I screw up if I accidentally send the host two consecutive
>  NOTIFYs?  In this case, is the reception of a sense message good
>  enough to continue or am I hosed up from then on?  (I. e, pending
>  my fixing that particular problem, is the rest of what I see okay?)
>  What do I do if the reserved bit of byte0 of the RH is set sometimes
>  and not others?  What exactly is the meaning of the DR1 bit?
>  There are more.
>

 Bob,

 One document you need is the old SNA format and protocol reference 
manual (FAP).  It is IBM document number SC30-3112 file code S370-30.
This document attempts to describe the SNA flow, THs, RHs, RUs, etc. 
Notify is a request pertaining to the reporting the status of the session
initiation or temination of the LU.   I would expect the host to respond to 
second (identical) Notify with a NSPE (Network Services Procedure error) 
indicating failure if the notify was from an ILU (init-self LU) or TLU
(Term-self LU) Otherwise you should see a Notify -RSP with a vector key 
of X'03' returned.   See Chapter 8.  Session services under NSPE, NOTIFY.

DR1 is the definate response indicator.  

If you can give me a trace I'll break it down for you and let you know what
you need to do.

  Louis