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Octet Sequences for Upper-Layer OSI to Support Basic Communications Applications (RFC1698)

IP.com Disclosure Number: IPCOM000002536D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 29 page(s) / 41K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Furniss: AUTHOR

Related Documents

10.17487/RFC1698: DOI

Abstract

This document states particular octet sequences that comprise the OSI upper-layer protocols (Session, Presentation and ACSE) when used to support applications with "basic communications requirements". This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group P. Furniss Request for Comments: 1698 Consultant Category: Informational October 1994

Octet Sequences for Upper-Layer OSI to Support Basic Communications Applications

Status of this Memo

This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Abstract

This document states particular octet sequences that comprise the OSI upper-layer protocols (Session, Presentation and ACSE) when used to support applications with "basic communications requirements". These include OSI application protocols such as X.400 P7 and Directory Access Protocol, and "migrant" protocols, originally defined for use over other transports.

As well as the octet sequences which are the supporting layer headers (and trailers) around the application data, this document includes some tutorial material on the OSI upper layers.

An implementation that sends the octet sequences given here, and interprets the equivalent protocol received, will be able to interwork with an implementation based on the base standard, when both are being used to support an appropriate application protocol.

Table of Contents

1. Introduction ...................................................2 2. General ........................................................3 2.1 Subdivisions of "basic communication applications" ...........3 2.2 Conformance and interworking .................................5 2.3 Relationship to other documents ..............................5 3. Contexts and titles ............................................6 3.1 The concepts of abstract and transfer syntax .................6 3.2 Use of presentation context by cookbook applications..........7 3.3 Processing Presentation-context-definition-list ..............8 3.4 Application context ..........................................9 3.5 APtitles and AEqualifiers ....................................9 4. What has to be sent and received ..............................10 4.1 Sequence of OSI protocol data units used ....................10 4.2 Which OSI fields are used ...................................12

Furniss [Page 1]

RFC 1698 ThinOSI Upper-Layers Cookbook October 1994

4.3 Encoding methods and length fields ..........................14 4.3.1 Session items .............................................14 4.3.2 ASN.1/BER items (Presentation and ACSE) ...................14 4.4 BER Encoding of values for primitive datatypes ..............15 4.5 Unnecessary constructed encodings ...........................16 5. Notation ......................................................16 6. Octet sequences ...............................................17 6.1 Connection request message ..................................17 6.2 Successful reply to connection setup ........................20 6.3 Connection rejection ........................................22 6.4 Data-phase TSDU .............................................23 6.5 Closedown -...

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