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+RPC Pluggable Modules How-To
+----------------------------
+
+About
+-----
+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.
+
+General Overview
+----------------
+When an RPC call is sent to smbd, smbd tries to load a shared library by the
+name librpc_<pipename>.so to handle the call if it doesn't know how to handle
+the call internally. For instance, LSA calls are handled by librpc_lsass.so.
+These shared libraries should be located in the <sambaroot>/lib/rpc. smbd then
+attempts to call the rpc_pipe_init function within the shared library.
+
+In the rpc_pipe_init function, the library should call
+rpc_pipe_register_commands(). This function takes the following arguments:
+
+int rpc_pipe_register_commands(const char *clnt, const char *srv,
+ const struct api_struct *cmds, int size);
+
+clnt - the Client name of the named pipe.
+srv - the Server name of the named pipe.
+cmds - a list of api_structs that map RPC ordinal numbers to function calls.
+size - the number of api_structs contained in cmds.
+
+See rpc_server/srv_reg.c and rpc_server/srv_reg_nt.c for a small example of
+how to use this library.
+
+- Anthony Liguori <aliguor@us.ibm.com>