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- .\" Copyright (c) 1986, 1988 Regents of the University of California.
- .\" All rights reserved.
- .\"
- .\" Redistribution and use in source and binary forms are permitted
- .\" provided that this notice is preserved and that due credit is given
- .\" to the University of California at Berkeley. The name of the University
- .\" may not be used to endorse or promote products derived from this
- .\" software without specific prior written permission. This software
- .\" is provided ``as is'' without express or implied warranty.
- .\"
- .\" @(#)build.me 6.3 (Berkeley) 9/19/89
- .\"
- .sh 1 "Building A System with a Name Server"
- .pp
- BIND is comprised of two parts. One is the user interface called the
- \fIresolver\fP
- which consists of a group of routines that reside in the C library
- \fI/lib/libc.a\fP.
- Second is the actual server called \fInamed\fP.
- This is a daemon that runs in the background and services queries on a
- given network port. The standard port for UDP and TCP is specified in
- \fI/\|etc/\|services\fP.
- .sh 2 "Resolver Routines in libc"
- .pp
- When building your 4.3BSD system you may either
- build the C library to use the name server resolver routines
- or use the host table lookup routines to do host name and address resolution.
- The default resolver for 4.3BSD uses the name server.
- .pp
- Building the C library to use the name server changes the way
- \fIgethostbyname\fP\|(3N), \fIgethostbyaddr\fP\|(3N), and \fIsethostent\fP\|(3N)
- do their functions.
- The name server renders \fIgethostent\fP\|(3N) obsolete,
- since it has no concept of a next line in the database.
- These library calls are built with the resolver routines needed
- to query the name server.
- .pp
- The \fIresolver\fP is comprised of a few routines that build query
- packets and exchange them with the name server.
- .pp
- Before building the C library, set the variable \fIHOSTLOOKUP\fP
- equal to \fInamed\fP in \fI/\|usr/\|src/\|lib/\|libc/\|Makefile\fP.
- You then make and install the C library and compiler and then
- compile the rest of the 4.3BSD system. For more information
- see section 6.6 of ``Installing and Operating 4.3BSD on the VAX\(dd''.
- .(f
- \(ddVAX is a Trademark of Digital Equipment Corporation
- .)f
-
- .sh 2 "The Name Service"
- .pp
- The basic function of the name server is to provide information about network
- objects by answering queries. The specifications for this name server
- are defined in RFC1034, RFC1035 and RFC974.
- These documents can be found in \fI/usr/src/etc/named/doc\fP in 4.3BSD
- or \fIftp\fPed from nic.ddn.mil. It is also recommeded that
- you read the related
- manual pages, \fInamed\fP\|(8),
- \fIresolver\fP\|(3),
- and \fIresolver\fP\|(5).
- .pp
- The advantage of using a name server over the host table lookup for
- host name resolution is to avoid the need
- for a single centralized clearinghouse for all names.
- The authority for this information can be delegated
- to the different organizations on the network responsible for it.
- .pp
- The host table lookup routines require that the master file
- for the entire network be maintained at a central location by a few people.
- This works fine for small networks where there are only a few machines and the
- different organizations responsible for them cooperate.
- But this does not work well for large networks where machines
- cross organizational boundaries.
- .pp
- With the name server, the network can be broken into a hierarchy of domains.
- The name space is organized as a tree according to organizational or
- administrative boundaries.
- Each node, called a \fIdomain\fP, is given a label, and the name of the
- domain is the concatenation of all the labels of the domains from
- the root to the current domain, listed from right to left separated by dots.
- A label need only be unique within its domain.
- The whole space is partitioned into several areas called \fIzones\fP,
- each starting at a domain and extending down to the leaf domains or to
- domains where other zones start.
- Zones usually represent administrative boundaries.
- An example of a host address for a host at the University of California,
- Berkeley would look as follows:
- .(b
- \fImonet\fP\|\fB.\fP\|\fIBerkeley\fP\|\fB.\fP\|\fIEDU\fP
- .)b
- The top level domain for educational organizations is EDU;
- Berkeley is a subdomain of EDU and monet is the name of the host.
-