Chapter 8:

Registration and Name Resolution (RNR)

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What do we have in this chapter?

1. Background

Name Space Models

Enumerating Name Spaces

2. Registering a Service

Installing a Service Class

Service Registration

3. Service Registration Example

4. WSALookupServiceBegin() and WSALookupServiceNext() Example

Querying a Service

Forming a Query

5. Querying DNS

Another Example: HOSTENT, gethostbyname() and gethostbyaddr()

6. Querying Network Location Awareness (NLA)

Summary

The registration and name resolution (RNR) functions might seem overly complicated, but they offer great flexibility in writing client/server applications. The real limitation of name registration lies with the name space. It's rather amazing that even with the popularity of TCP/IP, the only name resolution method available is been DNS, which is not very flexible. With the Windows 2000, Windows XP, and Windows NT domain spaces, a persistent, protocol-independent method of name resolution is available, offering the necessary flexibility to write robust applications. In addition, other name spaces (such as SAP) are available for IPX/SPX-based applications, offering many of the same capabilities of the Windows NT domain space (except for protocol independence).

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