Inside Macintosh: Networking /

Chapter 4 - Zone Information Protocol (ZIP)

This chapter describes the Zone Information Protocol (ZIP) that maintains mappings of zone names to network numbers on internet routers. ZIP is primarily implemented by routers. A small portion of ZIP is implemented on nodes that are not routers to allow you to obtain zone information from a router node. This chapter describes only the portion of ZIP that is implemented on a node that is not a router.

You should read this chapter if you want to obtain

• the name of the zone to which the node belongs that is running your application
• the names of the zones for the local network to which your application's node
  is connected
• the names of all the zones that exist throughout the AppleTalk internet to which your local network belongs

The portion of ZIP that is implemented on nodes that are not routers uses the AppleTalk Transaction Protocol (ATP) to send requests for zone information to a router node. To better understand how ZIP handles your requests for information and returns to you responses to those requests, you should read the chapter "AppleTalk Transaction Protocol (ATP)" in this book.

For an overview of the Zone Information Protocol and how it fits within the AppleTalk protocol stack, read the chapter "Introduction to AppleTalk" in this book, which also introduces and defines some of the terminology used in this chapter. For a description of the Zone Information Protocol specification, see Inside AppleTalk, second edition.

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Chapter Contents

About ZIP

Using ZIP

Getting the Name of Your Application's Zone

Getting a List of Zone Names for Your Local Network or Its Internet

ZIP Reference

Data Structures

The XPP Parameter Block for ZIP

Routines

Obtaining Zone Information

Summary of ZIP

Pascal Summary

Constants

Data Types

The XPP Parameter Block for ZIP

Routines

Obtaining Zone Information

C Summary

Constants

Data Types

The XPP Parameter Block for ZIP

Routines

Obtaining Zone Information

Assembly-Language Summary

Constants

XPP csCode

XPP Driver Unit Reference Number

XPP xCall Subcodes for ZIP Commands

Data Structures

XPP Parameter Block Common Fields for ZIP Routines

GetMyZone

GetLocalZones

GetZoneList

Result Codes