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+<chapter id="rpc-plugin">
+<chapterinfo>
+	<author>
+		<firstname>Anthony</firstname><surname>Liguori</surname>
+		<affiliation>
+			<orgname>IBM</orgname>
+			<address><email>aliguor@us.ibm.com</email></address>
+		</affiliation>
+	</author>
+	<author>
+		<firstname>Jelmer</firstname><surname>Vernooij</surname>
+		<affiliation>
+			<orgname>Samba Team</orgname>
+			<address><email>jelmer@samba.org</email></address>
+		</affiliation>
+	</author>
+	<pubdate>January 2003</pubdate>
+</chapterinfo>
+
+<title>RPC Pluggable Modules</title>
+
+<sect1>
+<title>About</title>
+
+<para>
+This document describes how to make use the new RPC Pluggable Modules features
+of Samba 3.0.  This architecture was added to increase the maintainability of
+Samba allowing RPC Pipes to be worked on separately from the main CVS branch.
+The RPM architecture will also allow third-party vendors to add functionality
+to Samba through plug-ins.
+</para>
+
+</sect1>
+
+<sect1>
+<title>General Overview</title>
+
+<para>
+When an RPC call is sent to smbd, smbd tries to load a shared library by the
+name <filename>librpc_&lt;pipename&gt;.so</filename> to handle the call if
+it doesn't know how to handle the call internally.  For instance, LSA calls
+are handled by <filename>librpc_lsass.so</filename>..
+These shared libraries should be located in the <filename>&lt;sambaroot&gt;/lib/rpc</filename>.  smbd then attempts to call the init_module function within
+the shared library. Check the chapter on modules for more information.
+</para>
+
+<para>
+In the init_module function, the library should call 
+rpc_pipe_register_commands().  This function takes the following arguments:
+</para>
+
+<para><programlisting>
+int rpc_pipe_register_commands(const char *clnt, const char *srv,
+                               const struct api_struct *cmds, int size);
+</programlisting></para>
+
+<variablelist>
+
+<varlistentry><term>clnt</term>
+<listitem><para>the Client name of the named pipe</para></listitem>
+</varlistentry>
+
+<varlistentry><term>srv</term>
+<listitem><para>the Server name of the named pipe</para></listitem>
+</varlistentry>
+
+<varlistentry><term>cmds</term>
+<listitem><para>a list of api_structs that map RPC ordinal numbers to function calls</para></listitem>
+</varlistentry>
+
+<varlistentry><term>size</term>
+<listitem><para>the number of api_structs contained in cmds</para></listitem>
+</varlistentry>
+
+</variablelist>
+
+<para>
+See rpc_server/srv_reg.c and rpc_server/srv_reg_nt.c for a small example of
+how to use this library.
+</para>
+
+</sect1>
+</chapter>