INTERNATIONAL STANDARD. Technologies de I in forma tion - Interconnexjon de systemes ouverts (OS/) - Appel de procedures 2 distance (RPC)

Transcription

1 INTERNATIONAL STANDARD ISO/IEC First edition Dit document mag slechts op een stand-alone PC worden geinstalleerd. Gebruik op een netwerk is alleen. toestaan als een aanvullende licentieovereenkomst voor netwerkgebruik met NEN is afgesloten. This document may only be used on a stand-alone PC. Use in a network is only permitted when a supplementary license agreement for us in a network with NEN has been concluded. Information technology - Open Systems Interconnection - Remote Procedure Cal1 (RW Technologies de I in forma tion - Interconnexjon de systemes ouverts (OS/) - Appel de procedures 2 distance (RPC) Reference number ISO/IEC 11578:1996(E)

2 ISO/IEC 11!578:1996(E) Contents Section 1 General 11 Scope 1:2 Normative references 1.3 Informative References 1.4 Definitions Reference model definitions Application Layer Structure definitions Service conventions definitions 1.5 Abbreviations 1.6 Portability 1.7 Services and Protocols 1.8 Conformance Requirements Section 2 Introduction to the RPC API 21 RPC Programming Model Overview 2:1.1 CIienVServer Model Interfaces Remoteness Binding Name Services Resource Models Security Services Server lmplementation Application/Stub/Run-time System RPC Run Time Stubs Application Code 2.2 API Operations Binding-related Operations Name Service Operations Endpoint Operations Security Operations Stub Memory Management Operations Management Operations UUID Operations 2.3 Binding Binding Handles Client and Server Binding Handles Obtaining Binding Handles String Bindings Binding Steps Server Binding Steps Client Binding Steps Cal1 Routing Algorithms Binding Methods IO ISO/IEC 1996 All rights reserved. Unless otherwise specified, no part of thrs publication may be reproduced or utilized in any form or by any means, electronrc or mechanrcal, rncluding photocopying and microfilm, without permtssron In wntlng from the publisher. ISO/IEC Copyright Office l Case postale 56 l CH Geneve 20 l Swrtzerland Printed in Switzerland

3 0 ISO/IEC ISO/IEC 11578:1996(E) lO 2.11.ll Section l Name Service Interface 30 Name Service Model 30 Name Syntax Tags 30 Name Service Attributes 31 Server Entries 31 Group Entries 31 Profiles 31 Binding Searches 32 Search Algorithm 33 Name Service Caching 34 Server Model 35 Server Concurrency and Request Buffering 35 Management Interface 35 Server Resource Models 36 The Server-Oriented Model 36 The Service-Oriented Model 36 The Object-Oriented Model 36 Secu rity 37 Error Handling 37 Cancel Notification 37 Stubs 39 IDL to Stub Data Type Mappings 39 Manager EPVs 39 Interface Handles 39 Stub Memory Management 39 RPC API Routine Taxonomy 40 Binding Operations 40 Interface Operations 40 Protocol Sequence Operations 41 Local Endpoint Operations 41 Object Operations 41 Name Service Interface Operations 42 NSI Binding Operations 42 NSI Entry Operations 42 NSI Group Operations 42 NSI Profile Operations 43 Authentication Operations 43 The Server Listen Operation 43 The String Free Operation 43 UUID Operations 43 Stub Memory Management 44 Endpoint Management Operations 44 Name Service Management Operations 44 Local Management Services 45 Local/Remote Management Services 45 Error Messages 45 RPC API Manual Pages 47 RPC Data Types 47 Unsigned Integer Types 47 Signed Integer Type 47 Unsigned Character String 47 Binding Handle 48 Binding Vector 49 Boolean Type 49 Endpoint Mag Inquiry Handle 49 Interface Handle 50 Interface tidentifier 50 Interface Identifier Vector 51 Manager Entry Point Vector 51

4 ISCMEC 11578:1996(E) 0 ISOAEC Name Service Handle 51 Protocol Sequence String 52 Protocol Sequence Vector 52 Statistics Vector 53 String Binding 53 String UUID 54 UUIDs 54 UUID Vector 54 rpc-binding-copy() 56 rpc-binding-free() 57 rpc-binding-from-string-binding ( ) 58 rpc-binding-inqauth-client ( ) 59 rpc-binding-inq-auth-info() 61 rpc-binding-inq-object ( ) 63 rpc-binding-reset ( ) 64 rpc-binding-serverfrom-client ( ) 65 rpc-binding-set-auth-info ( ) 66 rpc-binding-set-object ( ) 68 rpc-binding-to-string-binding ( ) 69 rpc-binding-vector-free ( ) 70 rpc-ep-register ( ) 71 rpc-ep-register-no-replace ( ) 74 rpc-ep-resolve-binding ( ) 76 rpc-ep-unregister ( ) 78 rpc-if-id-vector-free ( ) 79 rpc-if-inq-id ( ) 80 rpc~mgmt~ep~elt~inq~begin ( ) 81 rpc~mgmt~ep~elt~inq~done ( ) 84 rpc~mgmt~ep~elt~inq~next ( ) 85 rpc-mgmt-ep-unregister ( ) 87 rpc~mgmt~inq~com~timeout () 89 rpc~mgmt~inq~dfit~protect~level( ) 90 rpc-mgmt-inq-if-ids ( ) 91 rpc~mgmt~inq~server~princ_name ( ) 93 rpc-mgmt-inq-stats ( ) 95 rpc~mgmt~is~server~listening ( ) 97 rpc-mgmt-set-authorizationfn () 99 rpc~mgmt~set~cancel~timeout ( ) 101 rpc-mgmt-set-comfimeout ( ) 102 rpc-mgmt-set-server-stack-size ( ) 104 rpc-mgmt-stats-vector-free ( ) 105 rpc-mgmt-stop-server-listening ( ) 106 rpc-network-inq-protseqs ( ) 107 rpc-network-is-protseq-valid ( ) 108 rpc-ns-binding-export ( ) 110 rpc-ns-binding-import-begin () 112 rpc-ns-binding-import-done ( ) 114 rpc-ns-binding-import-next () 115 rpc-ns-binding-inq-entry-name ( ) 118 rpc-ns-binding-lookup-begin ( ) 120 rpc-ns-binding-lookup-done() 122 rpc-ns-binding-lookup-next ( ) 123 rpc-ns-binding-select ( ) 126 rpc-ns-binding-unexport ( ) 127 rpc-ns-entry-expand-name ( ) 129 rpc-nsentry-inq-resojution ( ) 130 rpc-ns-entry-object-inq-begin ( ) 132 rpc-nsentry-object-inq-done ( ) 133 rpc-ns-entry-object-inq-next ( ) 134

5 0 ISWIEC 11578:1996(E) rpc-ns-group-delete ( ) 136 rpc-ns-group-mbr-add ( ) 137 rpc-ns-group-mbr-inq-begin ( ) 139 rpc-ns-group-mbr-inq-done ( ) 141 rpc---ns-group-mbr-inq-next ( ) 142 rpc-ns-group-mbr-remove() 144 rpc-ns-mgmt-binding-unexport ( ) 146 rpc-ns-mgmt-entry-create ( ) 149 rpc-ns-mgmtentry-delete ( ) 150 rpc-ns-mgmtentry-inq-if-ids ( ) 151 rpc-ns-mgmt-handle-setexp_age() 153 rpc~ns~mgmt~inq~exp~age() 154 rpc-ns-mgmt-set-exp-age( ) 156 rpc-ns-profile-delete() 158 rpc-ns-profile-elt-add ( ) 159 rpc-ns-profile-elt-inq-begin ( ) 161 rpc-ns-profile-elt-inq-done ( ) 164 rpc~ns~profile~elt~inq~next ( ) 165 rpc~ns~profile~elt~remove ( ) 167 rpc-object-inqfype ( ) 169 rpc-object-set-inq-fn ( ) 171 rpc-object-setfype ( ) 172 rpc-protseq-vectorfree ( ) 174 rpc-server-inq-bindings ( ) 175 rpc-server-inq-if ( ) 177 rpc-server-listen ( ) 178 rpc-server-register-auth-info ( ) 180 rpc-server-register-if ( ) 182 rpc-server-unregister-if () 185 rpc-server-use-all-protseqs ( ) 187 rpc-server-use-all-protseqs-if ( ) 189 rpc-server-use-protseq ( ) 191 rpc-server-use-protseq-ep ( ) 193 rpc-server-use-protseq-if ( ) 195 rpc-sm-allocate ( ) 197 rpc-sm-client-free ( ) 198 rpc-sm-destroy-client-context ( ) 199 rpc-sm-enable-allocate ( ) 200 rpc-sm-free ( ) 201 rpc-sm-getfhread-handle ( ) 202 rpc~sm~set~client~alloc~free() 203 rpc-sm-set-thread-handle ( ) 204 rpc~sm~swap~client~alloc~free() 205 rpc-string-binding-compose ( ) 206 rpc-string-binding-parse ( ) 207 rpc-stringfree() 209 uuid-compare() 211 uuid-create() 212 uuid-create-nil() 213 uuid-equal( ) 214 uuidfrom-string ( ) 215 uuid-is-nil() 216 uuidfo-string () 217 Section 4 Interface Definition Language Notation IDL Language Specification IDL Lexemes Keywords and Reserved Words Identifiers 220

6 ISOAEC 11578:1996(E) 0 ISO/IEC vi IDL Punctuation Alternate Representation of Braces White Spate Comments Interface Definition Structure Interface Header The uuid Attribute The version Attribute The endpoint Attribute The local Attribute The pointer default Attribute Interface Body Import Declaration Constant Declaration Syntax Semantics and Restrittions Type Declarations and Tagged Declarations Base Types Syntax Integer Types The char Types The boolean Type The byte Type The void Type The handle-t Type Constructed Types Structures Unions Syntax Semantics and Restrittions Enumerated Types Pipes Syntax Semantics and Restrittions Arrays Syntax Semantics and Restrittions Arrays of Arrays Type Attributes Syntax Semantics and Restrittions The transmit as Attribute The handle Attribute The string Attribute The context handle Attribute Field Attributes Syntax Semantics and Restrittions The ignore Attribute Field Attributes in Array Declarations Conformant Arrays Varying and Conformant Varying Arrays Relationships Between Attributes Negative Size and Length Specifications Field Attributes in String Declarations The first is, last is and iength is Attributes The max is Attribute The size -is Attribute Pointers

7 0 ISO/IEC ISO/IEC 11578:1996(E) Section Syntax Semantics and Restrittions Attributes Applicable to Pointers Varying Arrays of Pointers Restrittions on Pointers Pointers as Arrays Pointers with the string Attribute Possible Ambiguity Resolved Operations The idempotent Attribute The broadcast Attribute The maybe Attribute Parameter Declarations Syntax Semantics and Restrittions Directional Attributes Aliasing in Parameter Lists Predefined Types The error-status-t Type International Character Types Anonymous Types The Attribute Configuration Source Comments Identifiers Syntax Include Declaration Specifying Binding Handles The explicit handle Attribute The implicit-handle Attribute The auto handle Attribute The represent as Attribute The code andiocode Attributes The in line and out of line Attributes Returrktatuses - - The comm Status Attribute The fault Status Attribute Interactioi of the comm Status and fault - Status Attributes The heap Attribute - The enable allocate Attribute IDL Grammakynopsis Grammar Synopsis Alphabetic Listing of Productions IDL Constructed Identifiers IDL and ACS Reserved Words Stubs The Application/Stub Interface Parameters Parameter Memory Management Client-side Allocation Server-side Allocation Aliasing Default Manager EPVs Interface Handle Pipes Processing of in Pipes Processing of out Pipes Processing of in,out Pipes IDL and ACS Type Attributes The IDL transmit - as Attribute vii

8 ISO/lEC 11578:1996(E) 0 ISO/IEC Section 6 Section 7 Section : ' : The IDL handle Attribute Interaction of IDL transmit as and IDL handle Attributes The ACS represent as Attribute Interaction of the ACS represent - as Attribute and the IDL handle Attribute Interaction of the ACS represent as Attribute with the IDL transmit as Attribute - Context Hand6 Rundown Interoperability Requirements on Stubs Operation Numbers Error Handling During Floating-Point Unmarshalling Remote Procedure Call Model CIientKerver Execution Model RPC Interface and RPC Object RPC Interfaces RPC Objects Interface Version Numbering Rules for Changing Version Numbers Definition of an Upwardly Compatible Change Non-upwardly Compatible Changes Remote Procedure Calls Nested RPCs Execution Semantics Context Handles Threads Cancels Binding, Addressing and Name Services Binding Endpoints and the Endpoint Mapper Client Operation Server Operation NSI Interface Common Declarations Protocol Towers The server name Object Attributes The group Object Attributes The Profile Object Attributes Encoding Name Service Class Values Error Handling Model RPC Service Definition Call Representation Data Structure Service Primitives Invoke Result Cancel Error Reject Statechart Specification Language Semantics The Elements of Statecharts State Hierarchies Concurrency Graphical Expressions Default Entrances Conditional Connectors Terminal Connectors Semantics that Require Special Consideration Implicit Exits and Entrances (Scope of Transitions) Conflicting Transitions

9 0 lso/iec ISO/IEC 11578:1996(E) Section : ' '3. 2 9'3 3 9:3: '6. 1 9'6 2 9:6: Execution Steps and Time 295 Synchronisation and Rate Conditions 296 Summary of Language Elements 297 Event Expressions 297 Condition Expressions 298 Action Expressions 298 Data Item Expressions 300 Atomic Numeric Expressions 300 Compound Numeric Expressions 300 String Expressions 300 RPC Protocol Definitions 301 Conformance 301 RPC Stub to Run-time Protocol Machine Interactions 302 Client Protocol Machines 302 Server Protocol Machines 303 Connection-oriented Protocol 304 CIient/Server 304 Association Group 304 Association 304 Association Management Policy 305 Primary and Secondary Endpoint Addresses 305 Call 305 Transport Service Requirements 305 Connection-oriented Protocol Machines 306 CO CLIENT ALLOC 306 CO-CLIENT-GROUP 306 CO-CLIENT- 306 ASSOCIATION 307 CONTROL 307 CANCEL 307 CALL 307 CO SERVER GROUP 307 CO-SERVER- 307 ASSOCIATION 308 CONTROL 308 CANCEL 308 WORKING 308 Connectionless Protocol 309 Clientkerver 309 Activity 309 Call 309 Maintaining Execution Context and Monitoring Liveness 309 Serial Numbers 310 Transport Service Requirements 310 Connectionless Protocol Machines 311 RPC Stub to Run Time Protocol Machine Interactions 311 CL CLIENT 311 CÖNTROL 311 AUTHENTICATION 311 CALLBACK 311 PING 311 CANCEL 311 DATA 312 CL SERVER 312 CÖNTROL 312 AUTHENTICATION 312 CANCEL 312 WORKING 312 Naming Conventions 313 ix

10 ISO/IEC 11578:1996(E) 0 ISOAEC Section 10 Connectionless RPC Protocol Machines CL CLIENT Machine cl CLIENT Activities CL-CLIENT States CL-CLIENT Events CL-CLIENT Conditions CL-CLIENT Actions CL-CLIENT Data-ltems CL SERVER Machine C?L SERVER Activities CL-SERVER States CL-SERVER Events CL-SERVER Actions CL-SERVER Conditions CL-SERVER Data-ltems 369 Section 11 Connktion-oriented RPC Protocol Machines CO CLIENT Machine CÖ CLIENT Activities CO-CLIENT States CO-CLIENT Events CO-CL1 ENT Actions CO-CLIENT Conditions CO-CLIENT Data-Items CO CLIENT ALLOC Machine CÖ CLIENT ALLOC Activities CO-CL1 ENT-ALLOC States CO-CLIENT-ALLOC Events CO-CLIENT-ALLOC Actions CO-CLIENT-ALLOC Conditions CO-CLIENT-ALLOC Data-ltems CO CL~ENT GROUP Machine CÖ CLIEN? GROUP States CO-CLIENT-GROUP Events CO-CLIENT-GROUP Data-ltems CO SERVER Machine CÖ SERVER Activities CO-SERVER States CO-SERVER Events CO-SERVER Actions CO-SERVER Conditions CO-SERVER Data-ltems CO SERVER GROUP Machine CÖ SERVER GROUP States CO-SERVER-GROUP Events CO-SERVER-GROUP Actions CO-SERVER-GROUP Data-ltems 463 Section 12 RPC PDU EncÖdings Generic PDU Structure Encoding Conventions Alignment Common Fields PDU Types Protocol Version Numbers Data Representation Format Labels Reject Status Codes Connectionless RPC PDUs Connectionless PDU Structure Header Encoding Protocol Version Number 469 X

11 0 ISOhEC ISO/lEC 11578:1996(E) PDU Type Flags Fields Data Representation Format Label Serial Number Object Identifier Interface Identifier Activity Identifier Server Boot Time Interface Version Sequence Number Operation Number Interface Hint Activity Hint PDU Body Length Fragment Number Authentication Protocol Identifier Connectionless PDU Definitions The ack PDU The cancel ack PDU The cancel>du The fack PDU The fault PDU The nocall PDU The ping PDU The reject PDU The request PDU The response PDU The working PDU Connection-oriented RPC PDUs Connection-oriented PDU Structure Fragmentation and Reassembly Connection-oriented PDU Data Types Declarations Connection-Oriented Protocol Versions The frag length Field Context identifiers The call id Field The assoc group id Field The alloc hint Field Authentication Data Optional Connect Reject and Disconnect Connection-oriented PDU Definitions The alter context PDU The alter-context resp PDU The bindpdu - The bind ack PDU The bind-nak PDU The cancel PDU The fault PDU The orphaned PDU The request PDU The response PDU The shutdown PDU Section 13 Security 13.1 The Generic RPC Security Model 13.1.l Generic Operation Generic Encodings Protection Levels Authentication Services Data xi

12 ISO/IEC 11578:1996(E) 0 lso/iec Authorisation Services Underlying Security Services Required Security Services for Connection-oriented Protocol Client Association State Machine Server Association State Machine Sequence Numbers The auth context id Field Integrity Protectioi Connection-oriented Encodings Common Authentication Verifier Encodings Encoding for Per-PDU Services Credentials Encoding Security Services for Connectionless Protocol Server Receive Processing Client Receive Processing Conversation Manager Encodings Challenge Request Data Encoding Response Data Encoding Authentication Verifier Encodings dce c authn level none dce-c-authn-level-connect dce-c-authn-level-cal dce-c-authn-ievelipkt dce~c~authnilevei_integrity dce-c-authn-level-privacy 507 Section 14 Transfer Syntax NDR Data Representation Format Label NDR Primitive Types Representation Conventions Alignment of Primitive Types Booleans Characters Integers and Enumerated Types Enumerated Types Floating-Point Numbers IEEE Format VAX Format Cray Format IBM Format Uninterpreted Octets NDR Constructed Types Representation Conventions Arrays Uni-dimensional Fixed Arrays Uni-dimensional Conformant Arrays Uni-dimensional Varying Arrays Uni-dimensional Conformant-varying Arrays Ordering of Elements in Multi-dimensional Arrays Multi-dimensional Fixed Arrays Multi-dimensional Conformant Arrays Multi-dimensional Varying Arrays Multi-dimensional Conformant and Varying Arrays Strings Varying Strings Conformant and Varying Strings Arrays of Strings Structures Alignment of Constructed Types Structures Containing Arrays 526 xii

13 0 ISO/IEC ISO/IEC 11578:1996(E) l A Al A:2 A.2.1 A.2.2 A.2.3 A.2.4 A.2.5 A3 A 4. B C D Dl. D2. D3. D D6. D7. E El. E2 E-2. 1 E F Fl. F2. G H I J K L Ll. M N NI. N2. N3. Q P PI. Structures Containing a Conformant Array 526 Structures Containing a Conformant and Varying Array 527 Unions Pipes Pointers Top-level Pointers Top-level Full Pointers Top-level Reference Pointers 529 Embedded Pointers 530 Embedded Full Pointers 530 Embedded Reference Pointers 531 Algorithm for Deferral of Referents 531 NDR Input and Output Streams 532 Universal Unique Identifier 533 Format 534 Algorithms for Creating a UUID 536 Glock Sequence 536 System Reboot 536 Glock Adjustment 537 Glock Overrun 537 UUID Generation 537 String Representation of UUIDs 538 Comparing UUIDs 539 Protocol Sequence Strings 541 Name Syntax Constants 543 Authentication, Authorisation and Protection-level 545 Arguments The authn svc Argument 545 The authzsvc Argument 545 The prote; level Argument 546 The privs Argument 547 The server princ name Argument 547 The auth identityargument 547 Key Func%ons 547 Reject Status Codes and Parameters 549 Reject Status Codes 549 Possible Failures 551 comm-status Parameter 551 fault Status Parameter 551 IDL to%-language Mappings 553 Data Type Bindings 553 Syntax Mappings 556 Portable Character Set 559 Endpoint Mapper Weil-known Ports 561 Protocol Identifiers 563 DCE CDS Attribute Names 565 Architected and Default Values for Protocol 567 Machines Protocol Tower Encoding 569 Protocol Tower Contents 570 The dce error inq text Manual Page 571 dce-errorinqtet ( ) IDL Data Type Declarations 573 Basic Type Declarations 573 Status Codes 575 RP@-specific Data Types 577 Endpoint Mapper Interface Definition 579 Conversation Manager Interface Definition 583 Server Interface 583

14 ISO/IEC 11578:1996(E) 0 ISO/IEC 82 6 R Rl. R2. R3 R 3. 1 R 32. R List of Figures Client Interface 585 Remote Management Interface 587 Mapping of RPC Protocol to an OSI Infrastructure 589 Abstract Syntax name 589 Transfer Syntax name 589 Simple RPC application context 590 Application context name 590 Component ASEs 590 Mapping to supporting Services l l 6-2 IO-1 1 o Information Required to Complete an RPC 20 Server Binding Relationships 24 Decisions in Looking Up an Endpoint 27 Decisions for Selecting a Manager 28 Execution Phases of an RPC Thread 272 Concurrent Call Threads Executing in Shared Execution Context 273 CL CLIENT Statechart 316 CL-SERVER Statechart 344 CÖ CLIENT Statechart 382 CO-CLIENT ALLOC Statechart 413 CO-CLIENT-GROUP Statechart 423 CO-SERVER Statechart 427 CO-SERVER GROUP Statechart 459 NDR Format Label The Boolean Data Type Character Data Type 512 NDR Integer Formats IEEE Single-precision Floating-Point Format IEEE Double-precision Floating-Point Format 515 VAX Single-precision (F) Floating-Point Format 515 VAX Double-precision (G) Floating-Point Format 516 Cray Floating-Point Formats 517 IBM Floating-Point Formats 517 Uninterpreted Octet Representation 518 Uni-dimensional Fixed Array Representation 520 Uni-dimensional Conformant Array Representation 520 Uni-dimensional Varying Array Representation 520 Uni-dimensional Conformant and Varying Array Representation 521 Multi-dimensional Fixed Array Representation 521 Multi-dimensional Conformant Array Representation 522 Multi-dimensional Varying Array Representation 522 Multi-dimensional Conformant and Varying Array Representation 523 Varying String Representation 523 Conformant and Varying String Representation 524 Multi-dimensional Conformant and Varying Array of Strings 525 Structure Representation 525 Representation of a Structure Containing a Conformant Array 526 Representation of a Structure Containing a Conformant and Varying Array 527 Union Representation 527 Pipe Representation 528 Top-level Full Pointer Representation 529 Top-level Reference Pointer Representation 530 Embedded Full Pointer Representations 531 Embedded Reference Pointer Representation 531 NDR Input Stream 532 NDR Output Stream 532 xiv

15 0 ISO/IEC lso/lec 11578:1996(E) List of Tables 3-I l I l l l A-l A-2 A-3 A-4 A-5 B-l C-l D-l D-2 E-l E-2 E-3 F-l F-2 G-l H-l l-l l-2 J-l K-l L-l L-2 L-3 Client and Server Binding Handles Rules for Returning an Object s Type Integer Base Types IDL Directional Attributes Alphabetic Listing of Productions Constructed Identifier Classes Transmitted Type Routines Transferred Type Routines Floating Point Error Handling Execution Semantics Protocol Tower Structure The server name Object Attributes RPC-specific Protocol Tower Layers Example Protocol Tower Service Group Object Attributes Configuration Profile Object Attributes Invoke Parameters Result Parameters Cancel Parameters Error Parameters Reject Parameters Events Related to Other Elements Compound Events Conditions Related to Other Elements Compound Conditions Actions Related to Other Elements Compound Actions RPC Protocol Data Units The First Set of PDU Flags Second Set of PDU Flags Authentication Protocol Identifiers NDR Format Label Values NDR Floating Point Types UUID Format UUID version Field UUID variant Field The 4 Msb of clock seq hi and reserved Field Order and Type RPC Protocol Sequence Strings RPC Name Syntax Defined Constants Casts for Authorisation Information RPC Key Acquisition for Authentication Services Reject Status Codes Failures Returned in a comm Status Parameter Failures Returned in a fault Status Parameter IDL/NDR/C Type Mappings- Recommended Boolean Constant Values Portable Character Set NDR Encodings Endpoint Mapper Weil-known Ports NDR Transfer Syntax Identifier Registered Single Octet Protocol Identifiers DCE CDS Attribute Names Default Protocol Machine Values Floors l to 3 lnclusive Floors 4 and 5 for TCP/IP Protocols Floors 4, 5 and 6 for DECnet ProtocoP xv

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