Oracle Audio Technologies Oracle Tuxedo manual Understanding How Oracle TMA TCP for Cics Works

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C H A P T E R 2

Understanding How Oracle TMA TCP for CICS Works

To understand how the Oracle Tuxedo Mainframe Adapter for TCP (CICS) (hereafter referenced as TMA TCP for CICS) product works, you should know how the product performs the following functions:

zStarting the Listener Program

zRunning Oracle TMA TCP for CICS

–Initializing the Handler

–Processing Remote Service Requests

–Shutting Down the Handler

–Starting the Requester Program

–Processing TMA TCP for CICS Originated Service Requests

–Shutting Down the Requester

zTranslating Data with TMA TCP gateway

Each of these operations is described in the following sections. Additionally, this document describes some programming considerations that may be useful when you develop or change programs that interoperate with TMA TCP for CICS.

Starting the Listener Program

The Listener program is supplied by IBM and is part of the Sockets for CICS software product which must be purchased from IBM.

Oracle Tuxedo Mainframe Adapter for TCP CICS User Guide

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Contents

Oracle Tuxedo Mainframe Adapter for TCP Page Contents Understanding How Oracle TMA TCP for Cics Works Configuring and Administering Oracle TMA TCP for Cics Vi OracleTuxedo Mainframe Adapter for TCP Cics User Guide Programming Oracle Tuxedo Mainframe Adapter for TCP Cics Error and Informational Messages What You Need to Know Introducing Tuxedo Mainframe Adapter for TCP CicsOracle TMA TCP Functionality Oracle TMA TCP for Cics ArchitectureDomains-based Gateway Connectivity Oracle TMA TCP for Cics Components TMA TCP for Cics Application Handler TMA TCP for Cics HandlerIBM TCP/IP Sockets for Cics Supplied Listener TMA TCP for Cics Pre-requesterTMA TCP for Cics Requester IBM TCP/IP Sockets InterfaceRequests from within an Oracle Tuxedo Domain Processing Scenarios TMA TCP for Cics Oracle Tuxedo to TMA TCP for Cics RoutingRequests from within Cics Oracle TMA Client Gateway Configuration Getting Started with TMA TCP for Cics Starting the Listener Program Understanding How Oracle TMA TCP for Cics WorksRunning Oracle TMA TCP for Cics Processing Remote Service RequestsInitializing the Handler Shutting Down the Handler Listing 2-1 Bdwn Command Line Syntax for Handlers Using Bdwn to Shut Down the HandlerShutting Down the Requester Starting the Requester ProgramListing 2-2 Bdwn Command Line Syntax for Requesters Using Bdwn to Shut Down the RequesterOracle Tuxedo Terminology Translating Data with TMA TCP gatewayField Type Translation Rules Data Translation RulesOracle Tuxedo Terminology Term DefinitionView Field Type/Length Remote Data Type DescriptionIncluding Null Characters in String Length Calculations Strings and Numeric Data a Closer LookService Request Processing with Security Configuring the TMA TCP SecuritySecurity Checking for Unix to Mainframe Transactions Security Checking from Unix to MainframeSecurity Checking for Mainframe to Unix Transactions Security Checking from Mainframe to UnixSecuring Inbound Services Setting Up Security for TMA TCP for CicsSecuring User Connections Securing Outbound Connections from Cics to Cics Securing Outbound Connections from Cics to UnixSecuring Outbound Connections from Cics to IMS Securing Outbound Services Configuring and Administering Oracle TMA TCP for Cics Main Menu Menu NavigationMenu Type Use Main Menu Beam Sub-menu Codes Area of Operation UsageMain Menu Beam Operation Codes Allowable Operation Enter This Code To Access This ScreenBrowse Requester Function Keys Definitions Update Connection Screen C2Connection Screens PF KeysField Name Description FieldsInquire Connection Screen C3 This name is the gateway ID. Specify a unique name up to Browse Connection Screen C5 Requester Screens Function Key Insert Requester Screen R1Configuring the TMA TCP Security section Used on the Oracle Tuxedo-side configuration. Coordinate Update Requester Screen R2 TMA TCP Security Cics Queue Name Inquire Requester Screen R3Is a unique name up to 16 characters. Example bankmach1 On the Oracle Tuxedo-side configuration. Coordinate with Delete Requester Screen R4 This name is a unique name up to 16 characters. Example An eight-character ID. This name must be the same ID Browse Requester Screen R5 Outbound Service Information Screens Function Keys Insert Outbound Service Information Screen S1Service name as it is known to the Cics programmer Update Outbound Service Information Screen S2 Inquire Outbound Service Information Screen S3 Delete Outbound Service Information Screen S4 This name is a symbolic name as it was defined on the Delete User Connection Account Screens Browse Outbound Service Information Screen S5Insert User Connection Account Screen U1 Update User Connection Account Screen U2 Inquire User Connection Account Screen U3 Delete User Connection Account Screen U4 Browse User Connection Account Screen U5 Inbound Service Information Screens Insert Inbound Service Information Screen Service name as it is known in the remote Oracle Tuxedo Cics section Update Inbound Service Information ScreenFields TCP Cics section Inquire Inbound Service Information ScreenFields Delete Inbound Service Information Screen Fields Message results Browse Inbound Service ScreenHandler Configuration Screens Update Handler Configuration Screen H2 Inquire Handler Configuration Screen H3 Fields Modifying Outbound Services Dynamically Configuring TMA TCP for CicsModifying User Connection Accounts Modifying Connections Administering the GatewaysDeleting Requester LMIDs Oracle Tuxedo Mainframe Adapter for TCP Cics User Guide Client Application Considerations Buffer Layout IssuesListing 5-1 Cobol Record Making Calls from a Cics Client ProgramListing 5-2 C Structures Request Codes Return Codes Value Listing 5-3 Cobol Cics Client Program Example ExamplesListing 5-4 C Cics Client Program Example Exec Cics Link Programprereq Error HandlingServer Application Considerations Application ErrorsProgramming Services without a Response Programming Services with a ResponseModifying the Length of the Return Message Oracle Tuxedo Mainframe Adapter for TCP Cics User Guide Message Description Messages Returned to the Remote GatewayDisconnect process has completed successfully Messages Written to the TMA TCP for Cics Log Password specified in the TMA TCP gateway configuration File control function with the Fgetfl option failed Handler is verifying that the account and password codes Connection already exists Codes Returned to a Cics Client ProgramValue Lmid Informational Process Messages Data Field Error MessagesMessage Description Action Entered is not valid MAX MSG Size entered is Enter a valid MAX MSG Size i.e System Error Messages Invreq