COMPAQ Software Product Description ___________________________________________________________________ PRODUCT NAME: DIGITAL[TM] SNA 3270 Data Stream SPD 26.87.08 Programming Interface for OpenVMS[TM], Version 1.6 This SPD describes DIGITAL[TM] SNA 3270 Data Stream Programming In- terface for OpenVMS[TM], which is available for the OpenVMS Alpha and OpenVMS VAX[TM] platforms. All information applies to both platforms unless otherwise indicated. DESCRIPTION DIGITAL SNA 3270 Data Stream Programming Interface for OpenVMS (3270 DS) is a layered software product that allows user-written applica- tions running on suitably configured OpenVMS systems within a DECnet[TM] or TCP/IP network or on suitably configured OpenVMS systems within an OpenVMS SNA environment to exchange messages with cooperating appli- cations on an IBM[R] host. The 3270 DS software exists in the OpenVMS system as a shareable image. Access between the cooperating Compaq and IBM applications is via one of the following products: TCP/IP or DECnet Connections o DIGITAL SNA Peer Server o DIGITAL SNA Domain Gateway o DIGITAL SNA Access Server for Windows NT[R] DECnet Only Connections o DECnet SNA Gateway for Synchronous Transport o DECnet SNA Gateway for Channel Transport November 1998 AE-ET78J-TE Single OpenVMS VAX System o OpenVMS SNA (VAX only), an OpenVMS VAX layered product that sup- ports local access as well as remote DECnet clients The 3270 DS programming interface is a collection of subroutines that provides an easy-to-use interface for the SNA Gateway or OpenVMS SNA application programmer who has a specific need to interface to an IBM application subsystem that uses the LU type 2 (LU2) protocol. The prod- uct can be used with many types of applications. As an example, a cus- tomized 3270 terminal emulator application can be written by a user and layered on top of 3270 DS. Applications can be event driven or syn- chronous in nature with no loss in available functions. Features The 3270 DS product is designed to insulate the OpenVMS application programmer from the inner workings of the SNA network environment as much as possible, thus allowing the user to concentrate on solving the application problem. The product performs the following SNA functions on the user's behalf: o Receives and interprets the bind o Accepts the bind and starts the session o Maintains the state machines for chaining, bracketing, and data flow control o Processes an Unbind Type 2 automatically o Allows, on supported SNA gateways and OpenVMS SNA systems, secured Logical Unit (LU) access via the SNA3270$REQUEST_CONNECT procedure call. As a result, the OpenVMS user is required to perform a minimum of SNA functions, including processing the CLEAR and CANCEL functions and han- dling contention. 2 This product is a set of subroutines used to perform such functions as establishing sessions, sending data, receiving data, and discon- necting sessions. In addition, the 3270 DS interface may be used to interpret the 3270 data stream and build a screen image. The OpenVMS application is then free to interact with the screen image. The 3270 DS product allows two modes of connection: Data Stream Mode and Field Mode. Data Stream Mode Data Stream Mode provides a means to send and receive uninterpreted 3270 data streams as defined by IBM. In this mode, the interface per- forms all SNA-specific functions. For example, the OpenVMS applica- tion is not required to handle chaining, brackets, RUs, or RHs. At the same time, this mode allows the interface to provide the OpenVMS ap- plication with the complete 3270 data stream. It is the OpenVMS user's responsibility to interpret the outbound data stream for 3270 orders and commands, and to build and manipulate a screen image (if desired). Similarly, it is the OpenVMS user's responsibility to build the in- bound data stream from the user's own screen image or from some other data structure. An OpenVMS application that needs to use extended attributes must use a Data Stream Mode connection. Extended attributes are extensions to the basic field attributes, namely: o Extended highlighting (blink, reverse video, underscore) o Color o Programmed symbols (selectable symbol set) o Screen partitions and windows Field Mode Field Mode performs a presentation service to provide a screen image interface. The screen image may be read field by field, or accessed 3 directly. The interface interprets 3270 commands and orders in an out- bound data stream to build the screen. In addition, it produces an in- bound 3270 data stream from the updated screen image. As with the Data Stream Mode, Field Mode insulates the OpenVMS user from the SNA protocol. Extended attributes are not supported by the Field Mode connection. Asynchronous Event Notification The 3270 DS product provides a mechanism for an OpenVMS user appli- cation to receive control when an asynchronous "network event" occurs, such as disconnection of a DECnet logical link, an SNA circuit fail- ure, or the receipt of an Unbind Type 2 from IBM. The OpenVMS appli- cation is called at a notification entry point defined by the appli- cation at connection time; an indication of the event that occurred is reported. User Interface Users of the 3270 DS product should be experienced OpenVMS applica- tion programmers. They can use any of the OpenVMS programming languages that conform to the OpenVMS Calling Standard to create application pro- grams that interact with application programs on an IBM system. The user documentation provides example segments written in the follow- ing languages: o MACRO-32 o BLISS-32 Implementation Language o C o COBOL o FORTRAN o PASCAL o PL/I 4 Users of the 3270 DS product are not required to have extensive knowl- edge of SNA. INSTALLATION Installation services from Compaq are recommended for a customer's first purchase of this software product. These services provide for instal- lation of the software product by an experienced software specialist. Customer Responsibilities Before installation of the software, the customer must: o Previously have installed all prerequisite software and hardware, including terminals. o Have demonstrated, to Compaq's satisfaction, any necessary IBM host software that will be communicating with the SNA gateway and the 3270 DS programming interface. o Make available for a reasonable period of time, as mutually agreed by Compaq and the customer, all hardware, communications facili- ties, and terminals that are to be used during installation. Installation service is available on a time and material basis. Con- tact your local Compaq office for more detailed information. HARDWARE REQUIREMENTS Processors Supported DIGITAL Alpha, VAX, MicroVAX[TM], VAXstation[TM], or VAXserver[TM] con- figuration as specified in the OpenVMS Operating System for Alpha and VAX Software Product Description (SPD 25.01.xx). 5 Disk Space Requirements (Block Cluster Size = 1) Disk space required for installation: OpenVMS Alpha 18,000 blocks (9.0 MB) OpenVMS VAX 17,900 blocks (9.0 MB) Disk space required for use (permanent): OpenVMS Alpha 7,900 blocks (4.0 MB) OpenVMS VAX 8,800 blocks (4.4 MB) These counts refer to the disk space required on the system disk. The sizes are approximate; actual sizes may vary depending on the user's system environment, configuration, and software options. SOFTWARE REQUIREMENTS For OpenVMS Alpha Systems o OpenVMS Operating System for Alpha and VAX, Version 6.2 or 7.1 with Y2K Patches (SPD 25.01.xx) o DECnet for OpenVMS AXP[TM] (SPD 42.25.xx) o DIGITAL TCP/IP Services for OpenVMS (SPD 46.46.xx) For VAX Systems in a DECnet SNA Gateway Environment o OpenVMS Operating System for Alpha and VAX, Version 6.2 or 7.1 with Y2K Patches (SPD 25.01.xx) o DECnet for OpenVMS VAX and Alpha (SPD 48.48.xx) o DEC[TM] TCP/IP Services for OpenVMS VAX, (SPD 25.A4.xx) 6 Required SNA Gateway One of the following SNA gateways is required: o DECnet SNA Gateway for Channel Transport (SPD 29.76.xx) o DECnet SNA Gateway for Synchronous Transport (SPD 25.C6.xx) o DIGITAL SNA Domain Gateway (SPD 38.69.xx) o DIGITAL SNA Peer Server (SPD 51.08.xx) o DIGITAL SNA Access Server for Windows NT (SPD 64.79.xx) For VAX Systems in an OpenVMS SNA Environment o OpenVMS Operating System for Alpha and VAX, Version 6.2 or 7.1 with Y2K Patches (SPD 25.01.xx) o OpenVMS SNA Software (SPD 27.01.xx) SOFTWARE LICENSING This software is furnished only under a license. For more information about Compaq's licensing terms and policies, contact your local Compaq office. License Management Facility Support This layered product supports the OpenVMS License Management Facil- ity. License units for this product are allocated on a CPU-capacity basis. For more information on the License Management Facility, re- fer to the OpenVMS Operating System for Alpha and VAX Software Prod- uct Description (SPD 25.01.xx) or the License Management Facility man- ual of the OpenVMS Operating System documentation set. For more information about Compaq's licensing terms and policies, con- tact your local Compaq office. GROWTH CONSIDERATIONS The minimum hardware and software requirements for any future version of this product may be different from the requirements for the cur- rent version. 7 DISTRIBUTION MEDIA For Alpha Systems This product is available as part of the OpenVMS Alpha Software Prod- uct Library on CD-ROM. The software documentation for this product is available as part of the OpenVMS Alpha Online Documentation Library on CD-ROM. Documenta- tion in hardcopy format can be ordered separately. For VAX Systems This product is available as part of the OpenVMS VAX Software Product Library on CD-ROM. The software documentation for this product is available as part of the OpenVMS VAX Online Documentation Library on CD-ROM. Documentation in hardcopy format can be ordered separately. YEAR 2000 READY The product was installed on a test machine and the system date was set so that the rollover to 1-JAN-2000 and date handling in the twenty- first century were observed to work correctly. SOFTWARE WARRANTY This software is provided by Compaq with a 90-day conformance warranty in accordance with the Compaq warranty terms applicable to the license purchase. 8 WARRANTY LIMITATIONS IBM Supported Configurations This software has been tested and is warranted against IBM System/370[TM] and IBM System/390[R] (includes 9xxx, 30xx, and 43xx series) class pro- cessor systems configured with the following IBM software. While this software may function correctly with other IBM software and equipment, and with software other than that supported by IBM, Compaq cannot of- fer its standard warranty for this software unless it has been tested with such equipment and software configurations. The 3270 DS software interoperates with the following IBM software: ___________________________________________________________________ Software Product Version Release ___________________________________________________________________ CICS/VSE[R] 2 All CICS/ESA[R] 4 1.0 Transaction Server All All IMS/ESA[R] All All NetView[R] 3 2.0 TME[R] 10 NetView All All TSO/E All All CMS/ESA 2 All ___________________________________________________________________ Since the introduction of this software, other configurations may have been tested. Please contact your local Compaq office for up-to-date information regarding listed configurations. NOTE: Compaq will support IBM software configurations, version and re- lease numbers, as long as support for such configurations is gener- ally available from IBM. 9 ORDERING INFORMATION For OpenVMS Alpha systems Software Licenses: QL-10XA*-** Software Documentation: QA-363AA-GZ Software Product Services: QT-10XA*-** Media and documentation for this product are available on the OpenVMS Alpha Software Product Library and Online Documentation Library on CD-ROM. Documentation in hardcopy format can be ordered separately. For OpenVMS VAX systems Software Licenses: QL-363A*-** Software Media: QA-363A*-** Software Documentation: QA-363AA-GZ Software Product Services: QT-363A*-** Media and documentation for this product are also available on the OpenVMS VAX Software Product Library and Online Documentation Library on CD-ROM. Documentation in hardcopy format can be ordered separately. * Denotes variant fields. For additional information on available li- censes, services, and media refer to the appropriate price book. SOFTWARE PRODUCT SERVICES A variety of service options are available. For more information on these or other services, please contact your local Compaq office. [R] IBM, CICS/ESA, CICS/VSE, IMS/ESA, NetView, and System/390 are registered trademarks of International Business Machines Corporation. [R] TME is a registered trademark of Tivoli Systems Inc., an IBM company. 10 [R] Windows NT is a registered trademark of Microsoft Corporation. [TM] System/370 is a trademark of International Business Machines Corporation. [TM] AXP, DEC, DECnet, DIGITAL, MicroVAX, OpenVMS, VAX, VAXserver, VAXstation, and VMS are trademarks of Compaq Computer Corporation. Compaq and the Compaq logo are registered in the United States Patent and Trademark Office. Other product names mentioned herein may be trademarks and /or registered trademarks of their respective companies. © 1998 Compaq Computer Corporation. All rights reserved. 11