Oracle Audio Technologies Oracle Tuxedo manual Requests from within Cics

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to the remote system. Also, when remote systems respond, TMA TCP gateway transforms these responses into replies that local client programs can process.

The TMA TCP for CICS software is implemented as an ordinary CICS program which communicates with the Sockets Interface. It accepts connection requests from the TMA TCP gateway and returns standard replies.

Simultaneous socket connections can exist between one TMA TCP for CICS gateway (a set of TMA Handlers within a single CICS region) and all remote TMA TCP gateway Requesters. Each socket connection is established automatically when a new TMA TCP gateway Requester in the Oracle Tuxedo domain establishes communication with the TMA TCP for CICS gateway.

Requests from within CICS

The mechanism used to send requests initiated from a CICS program to a remote Oracle Tuxedo domain is invisible to the user and significantly abstracted from the CICS programmer. Your company’s CICS program issues an EXEC CICS LINK command to the Oracle TMA gateway. In the data passed with the EXEC CICS LINK command, the programmer supplies the name of the service and the data to be used as input to that service. When the EXEC CICS LINK command returns, the reply to the request is placed in that same data area. If there was a problem satisfying the service request, meaningful return codes are sent back.

1-8	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 Introducing Tuxedo Mainframe Adapter for TCP Cics What You Need to KnowOracle TMA TCP Functionality Oracle TMA TCP for Cics ArchitectureDomains-based Gateway Connectivity Oracle TMA TCP for Cics Components TMA TCP for Cics Handler TMA TCP for Cics Application HandlerTMA TCP for Cics Pre-requester TMA TCP for Cics RequesterIBM TCP/IP Sockets Interface IBM TCP/IP Sockets for Cics Supplied ListenerProcessing Scenarios Requests from within an Oracle Tuxedo DomainOracle Tuxedo to TMA TCP for Cics Routing TMA TCP for CicsRequests from within Cics Oracle TMA Client Gateway Configuration Getting Started with TMA TCP for Cics Understanding How Oracle TMA TCP for Cics Works Starting the Listener ProgramRunning Oracle TMA TCP for Cics Processing Remote Service RequestsInitializing the Handler Shutting Down the Handler Using Bdwn to Shut Down the Handler Listing 2-1 Bdwn Command Line Syntax for HandlersStarting the Requester Program Shutting Down the RequesterUsing Bdwn to Shut Down the Requester Listing 2-2 Bdwn Command Line Syntax for RequestersTranslating Data with TMA TCP gateway Oracle Tuxedo TerminologyData Translation Rules Oracle Tuxedo TerminologyTerm Definition Field Type Translation RulesRemote Data Type Description View Field Type/LengthStrings and Numeric Data a Closer Look Including Null Characters in String Length CalculationsConfiguring the TMA TCP Security Service Request Processing with SecuritySecurity Checking from Unix to Mainframe Security Checking for Unix to Mainframe TransactionsSecurity Checking from Mainframe to Unix Security Checking for Mainframe to Unix TransactionsSecuring 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 Usage Main Menu Beam Sub-menu Codes Area of OperationEnter This Code To Access This Screen Main Menu Beam Operation Codes Allowable OperationBrowse Requester Update Connection Screen C2 Connection ScreensPF Keys Function Keys DefinitionsFields Field Name DescriptionInquire Connection Screen C3 This name is the gateway ID. Specify a unique name up to Browse Connection Screen C5 Requester Screens Insert Requester Screen R1 Function KeyConfiguring the TMA TCP Security section Used on the Oracle Tuxedo-side configuration. Coordinate Update Requester Screen R2 TMA TCP Security Cics Inquire Requester Screen R3 Queue NameIs 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 Insert Outbound Service Information Screen S1 Function KeysService 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 Browse Outbound Service Information Screen S5 User Connection Account ScreensInsert 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 Update Inbound Service Information Screen Cics sectionFields Inquire Inbound Service Information Screen TCP Cics sectionFields Delete Inbound Service Information Screen Fields Browse Inbound Service Screen Message resultsHandler 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 Buffer Layout Issues Client Application ConsiderationsListing 5-1 Cobol Record Making Calls from a Cics Client ProgramListing 5-2 C Structures Request Codes Return Codes Value Examples Listing 5-3 Cobol Cics Client Program ExampleListing 5-4 C Cics Client Program Example Error Handling Exec Cics Link ProgramprereqApplication Errors Server Application ConsiderationsProgramming Services without a Response Programming Services with a ResponseModifying the Length of the Return Message Oracle Tuxedo Mainframe Adapter for TCP Cics User Guide Messages Returned to the Remote Gateway Message DescriptionDisconnect 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 Codes Returned to a Cics Client Program Connection already existsValue 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