Sun RPC for Python?, xdrlib

[Sameer Ajmani]

I'm looking for an implementation of Sun RPC for Python.  In particular, 
I'm hoping to find the equivalent of rpcgen, which takes an XDR 
specification of an RPC protocol and generates the marshalling and 
unmarshalling code.  I cannot use XML-RPC for this application, because 
I need compatibility with legacy Sun RPC programs.

Also, has anyone implemented a version of xdrlib.Unpacker and Packer 
that reads/writes directly to file objects, rather than to buffers?  It 
would be more efficient to be able to pack data directly to a socket, 
rather than using an intermediate buffer.

Thanks!
Sameer