This is the situation as I understand it. We have a mainframe program (not
CICS) that communicates with a CICS region using Enterprise Extender The
code that enables this is vendor provided so we don't have much
visibility of how that works,

On the CICS side there are a number of terminals defined that invoke
defined CICS transactions when traffic arrives from that mainframe program.


This pattern is being replaced by external messages coming in at our public
gateway in AS2805 format, that need to be routed to the CICS region.

https://arthurvandermerwe.com/2014/06/22/as2805-standards-for-eft/

So it seems like we need to write some CICS Socket code to receive and
process that traffic. And based on my limited research to date, since the
traffic is not in a standard protocol like http, sftp etc. we cannot use
CICS Socket Domain but have to use CICS Sockets,


On Fri, Dec 13, 2024 at 12:04 PM Frank Swarbrick <
[email protected]> wrote:

> Are you wanting to write custom protocols, or are you just going to use
> HTTP/S?  Does the client have a TN3270 emulator available?  If you want the
> connection to behave "as a terminal" it seems like this is your best bet.
>
> ________________________________
> From: IBM Mainframe Discussion List <[email protected]> on behalf
> of Laurence Chiu <[email protected]>
> Sent: Thursday, December 12, 2024 12:54 PM
> To: [email protected] <[email protected]>
> Subject: Re: Anybody with experience with CICS Sockets or CICS Sockets
> Domain?
>
> Thanks for that information. I already have the SHARE presentation but the
> manual was new to me so I have grabbed that to read.
>
> On Fri, Dec 13, 2024 at 4:02 AM Wendell Lovewell <
> [email protected]> wrote:
>
> > Code examples but that would depend on which language you're using.  I'd
> > expect an AI Copilot or monica.so to be able to come up with something.
> >
> > The SHARE presentation 'Connecting CICS with TCP' has a pretty thorough
> > coverage about TCP/IP and CICS, 'tho no code examples.
> >
> > The 'IP CICS Sockets Guide' SC27-3649 has some really helpful information
> > on socket programming under CICS.  Chapters 6 and 8 (I used the EZASOKET
> > interface with COBOL) were especially helpful.
> >
> > hth,
> > Wendell
> >
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