HP SNA APPC/LU6.2 Programming Inteface for OpenVMS

Software
Product
Description
PRODUCT NAME: HP SNA APPC/LU6.2 Programming SPD 26.88.12
Interface for OpenVMS, Version 2.6
This SPD describes the HP SNA APPC/LU6.2 Program-
ming Interface for OpenVMS, which is available for the
OpenVMS Operating System for OpenVMS I64, Open-
VMS Alpha and OpenVMS VAX platforms. All informa-
tion applies to all the platforms unless otherwise indi-
cated.
DESCRIPTION
The HP SNA Advanced Program-to-Program Commu-
nications/Logical Unit 6.2 (APPC/LU6.2) Programming
Interface for OpenVMS (the APPC product) is a lay-
ered software product that allows user-written applica-
tions running on suitably congured OpenVMS systems,
either within a DECnet or TCP/IP network or on suit-
ably congured OpenVMS systems within an OpenVMS
SNA environment to exchange messages with cooper-
ating applications in an IBM® host. The APPC software
exists in the OpenVMS system as a shareable image.
Access between the cooperating HP and IBM applica-
tions is via one of the following products:
TCP/IP or DECnet Connections
HP SNA Peer Server
HP SNA Domain Gateway
HP SNA Access Server for Windows NT®
HP SNA Server for OpenVMS Alpha, a layered prod-
uct that supports local access as well as TCP/IP and
DECnet clients
DECnet Only Connections
HP SNA Gateway for Synchronous Transport
HP DECnet SNA Gateway for Channel Transport
HP SNA Server for OpenVMS VAX, a layered prod-
uct that supports local access as well as remote
DECnet clients
The APPC product is a set of subroutines that are called
by OpenVMS programs which act as LU6.2 transac-
tion application programs. These subroutines allow an
OpenVMS transaction application to:
Activate and deactivate sessions
Allocate and deallocate LU6.2 basic and mapped
conversations
Send and receive data
Request conrmation and conrm transactions
Send and receive error information
•Dene and delete local LU names and TP names
Supply program initialization parameters
Supply session-level security and inbound conversa-
tion level security
Allow outbound conversation allocation
Notify the user application of session failure
Notify the user application of conversation dealloca-
tion (not applicable to HP SNA Access Server for
Windows NT®)
Features
The APPC product provides features to assist the user
in writing and executing the OpenVMS transaction pro-
gram. The APPC product performs the SNA commu-
nications function on the programmer’s behalf, allow-
ing the user to concentrate on solving the application
December 2006

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