Re: Port communication problems

Dave - is this a sockets program via tcp or a asynch or bisynch program
via rpg or similar? In a asynch program I do with a credit card co, when
they send a packet, I send back an ACK (a 1 character hex value). If
they are done, they send an EOT (finish ack?) and I send a final ACK.
All the signals are 1 character hex values, which when converted to
ascii, equal the ascii value the other server is looking for. Below is
a list of hex values I use (don't need all of them).
D* communication characters
d* warning: this table works with tables QASCII & QEBCDIC only
D  Soh            S              1A   inz(x'01')
start of header
D  Stx            S              1A   inz(x'02')
start of text
D  Etx            S              1A   inz(x'03')
end of text
D  Etb            S              1A   inz(x'26')
end transmit block
D  Enq            S              1A   inz(x'2D')
enquiry
D  Syn            S              1A   inz(x'16')
synchronization
D  Eot            S              1A   inz(x'37')
end of transmit
D  Ack            S              1A   inz(x'2E')
acknowledgement
D  Nak            S              1A   inz(x'3D')
negative acknowledge
D  Fs             S              1A   inz(x'1C')
field seperator
D  Plus           S              1A   inz(x'4E')
hangup

hth
jim franz


----- Original Message -----
From: "Dave Snyder" <dsnyder@blcnet.com>
To: <midrange-l@midrange.com>
Sent: Thursday, July 25, 2002 4:41 PM
Subject: Port communication problems


A shot in the dark...

We are having a very strange and trouble-some problem with communications
with another site that I was wondering if anyone would have any insight
into. The site on the other end (servers of some type) claims that they are
sending us (an AS400) a Finish Acknowledgment packet when the communication
is complete They then say the host should be responding with just an
Acknowledgment packet, instead, the host is responding with a Reset
Acknowledgment packet - this is unexpected and causing a packet to be
dropped that it is not expecting. From what I understand, the Reset
Acknowledgment is the Hosts way of saying that its killing communications
and doesn't want to talk any more.
We are on v4r5 and talking via a T1.

Anybody have any ideas what might be causing something like this?

Dave

This is the best I could describe...does it make any sense or shed any light
on our dilemma?...TM

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