User guide

DC 900-1303C

Preface

Purpose of Document

This document describes the packets that are exchanged between a client and a Freeway

server. It aids the client application developer in the construction of the data packets

necessary to open and close sessions to the Freeway server and communicate with the

ICP protocol logic. It is intended for use in the development of client applications that

choose not to use the Data Link Interface (DLI) provided by Simpact. Developers who

may or may not choose to use the Transport Subsystem Interface (TSI) provided by

Simpact also need to use this document to establish communications to the ICP proto-

col logic.

The information in this document supplements that in the programmer’s guide for

your particular protocol software running on the Freeway ICP. Users of the TSI pro-

vided by Simpact also need to reference the TSI Reference Guide in conjunction with

this document. All developers should become familiar with the

Freeway User Guide

sec-

tions on server conﬁguration of its TSI.

Intended Audience

This document should be read by application programmers. You should understand the

concepts of the client-server interface and be familiar with the C programming lan-

guage. You should also be familiar with your particular protocol programmer’s guide,

the

Freeway Transport Subsystem Interface Reference Guide

, and the

Freeway User Guide

(see the “Simpact References” section below).