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\f

\chapter       {A Complete Example}\label{cook:example}
Now, let's consider a complete example.
Our application is modeled after the example given in \cite{Courier.BSD}.
In short,
we wish to implement a remote lookup facility of the \unix/ \file{/etc/passwd}
database.

\f

\section	{Service Definitions}
We begin by defining the mundane naming and addressing information for the
service.
Using the ``standard'' approach described in Section~\ref{service:define},
we select:
\begin{describe}
\item[abstract syntax:]	defined in the \man isobjects(5) file as:
\begin{quote}\small\begin{verbatim}
"local service pci"      1.17.2.n.1
\end{verbatim}\end{quote}
If we select \verb"n" as the lowest unassigned number in the \verb"1.17.2"
subtree, e.g., \verb"7", we might have:
\begin{quote}\small\begin{verbatim}
"isode passwd lookup pci"      1.17.2.7.1
\end{verbatim}\end{quote}

\item[application context name:] defined in the \man isobjects(5) file as:
\begin{quote}\small\begin{verbatim}
"local service"          1.17.2.n.2
\end{verbatim}\end{quote}
Similarly, for a value of \verb"7" for \verb"n", we have:
\begin{quote}\small\begin{verbatim}
"isode passwd lookup"          1.17.2.7.2
\end{verbatim}\end{quote}

\item[{\small application-entity information/presentation address:}]
defined with:
\begin{quote}\small\begin{verbatim}
default servicestore    1.17.4.1.n  ""  ""  #p
\end{verbatim}\end{quote}
in the \man isoentities(5) file.
If we select \verb"p" as the lowest unassigned TSAP ID between \verb"1024"
and \verb"2047" inclusive, e.g., \verb"1040", we might have:
\begin{quote}\small\begin{verbatim}
default passwdstore     1.17.4.1.7  ""  ""  #1040
\end{verbatim}\end{quote}

\item[local program:] defined in the \man isoservices(5) file as:
\begin{quote}\small\begin{verbatim}
"tsap/local service"    #p  program arg1 arg2 ... argN
\end{verbatim}\end{quote}
If we select \pgm{ros.lookup} as the \unix/ program implementing this
service,
we might have something like:
\begin{quote}\small\begin{verbatim}
"tsap/isode passwd"     #1040 /usr/etc/ros.lookup
\end{verbatim}\end{quote}
\end{describe}

\f

\section	{Remote Operations Module}
The remote operations module for the service is placed in \file{lookup.ry}.
This file shown in Figure~\ref{passwd:rom} starting on
page~\pageref{passwd:rom}.

The \file{Makefile} for the service is shown in Figure~\ref{passwd:make}
starting on page~\pageref{passwd:make}.

\newpage
\tagrindfile{passwd-ops}%
	{Remote Operations Module for the Password Lookup Service}{passwd:rom}
\newpage
\tagrindfile{passwd-make}{Makefile for the Password Lookup Service}%
	{passwd:make}
\newpage

\f

\section	{Interactive Initiator}\label{passwd:initiator}
The interactive initiator of the service is placed in \file{lookup.c}.
This file is shown in Figure~\ref{passwd:init} starting on
page~\pageref{passwd:init}.

\tagrindfile{passwd-init}{Initiator for the Password Lookup Service}%
	{passwd:init}
\newpage

\f

\section	{Responder}\label{passwd:responder}
The responder for the service is placed in \file{lookupd.c}.
This file is shown in Figure~\ref{passwd:resp} starting on
page~\pageref{passwd:resp}.
Note that if actual network addresses were associated with the service
definitions made earlier,
then the responder could operate using the static discipline.

\tagrindfile{passwd-resp}{Responder for the Password Lookup Service}%
	{passwd:resp}